A battery device and an electric device

Abstract

The application discloses a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a battery monomer assembly, a mounting box and a hanger. The battery monomer assembly comprises a battery monomer. The mounting box comprises a box body, the box body comprises a support body and a cladding layer cladded on the outer surface of the support body, the material of the cladding layer is a reinforced composite material, the cladding layer is surrounded to form a containing cavity, and the battery monomer is located in the containing cavity. The hanger is mounted on the box body, and the hanger is used for hanging the box body. The battery device and the power utilization device of the embodiment of the application can better install the box body of the battery device to the device main body of the power utilization device in the case that the original structure of the support body and the cladding layer is changed little or even hardly changed, and the problems caused by different structures of the box body are relieved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery device and an electrical device. Background Technology

[0002] Batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are increasingly being used in the field of energy storage.

[0003] In related technologies, the battery pack housing is suspended and installed on the main body of the electrical device at the receiving hole. However, it is difficult to install the battery pack housing well onto the main body of the electrical device while minimizing modifications to the support and the covering layer. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application provides a battery device and an electrical device, so that the battery device housing can be better installed on the main body of the electrical device with minimal changes to the support and the covering layer.

[0005] This application is achieved through the following technical solution.

[0006] A first aspect of this application provides a battery device, comprising:

[0007] Battery cell assembly, including battery cells;

[0008] The mounting box includes a box body, the box body includes a support body and a covering layer covering the outer surface of the support body, the covering layer is made of reinforced composite material, the covering layer surrounds a receiving cavity, and the battery cell is located in the receiving cavity;

[0009] A hanger is installed on the enclosure, and the hanger is used to suspend the enclosure.

[0010] In this embodiment, by adding additional mounts to the housing, different mounts are adapted to address the different problems exhibited by housings with different structures under the load applied by the main body of the device. By using different mounts to bear part of the load applied by the main body of the electrical device, the different problems exhibited by housings with different structures are alleviated, and the housing is better installed on the main body of the electrical device. The original structural modifications to the support and the covering layer are minimal or even unnecessary. It is almost unnecessary to replace the original support and the covering layer of the housing. This allows the battery housing to be better installed on the main body of the electrical device with minimal modifications to the support and the covering layer.

[0011] In some embodiments, the housing has a receiving hole penetrating the support and the covering layer. The outer surface of the covering layer that coincides with the openings at both ends of the receiving hole along the axial direction of the receiving hole is a first surface. At least one of the mounters is a mounting mounting component. The mounting mounting component includes a main pad layer and a first sleeve. The receiving hole is provided with the main pad layer at both opposite ends along the axial direction of the receiving hole. The first surface at both ends is located between the two main pad layers. The first sleeve passes through the receiving hole, and the two ends of the first sleeve are respectively connected to the corresponding main pad layer.

[0012] In this embodiment, a main pad layer is provided at both ends of the receiving hole along the axial direction of the receiving hole. The first surfaces at both ends are located between the two main pad layers. The two main pad layers cover the first surfaces at both ends of the covering layer, so that the two main pad layers can separate the covering layer and the threaded connection structure that locks the box. The force applied by the threaded connection structure that locks the box mainly acts on the main pad layer and is supported by the first sleeve. The force applied by the threaded connection structure that locks the box mainly bears the load through the mounting bracket, which reduces the load borne by the covering layer near the first surface at the receiving hole. This helps to reduce the possibility of creep in the covering layer made of reinforced composite material, thereby suppressing the torque attenuation of the threaded connection structure that locks the box and making it easier for the threaded connection structure to lock the box more firmly. By adding additional mounting components to the enclosure, the load is mainly applied to the main padding layer of the mounting components. This reduces creep of the covering layer to suppress torque attenuation of the threaded connection structure that locks the enclosure. The original structural modifications to the support and covering layer are minimal or even unnecessary. It is almost unnecessary to replace the original support and covering layer of the enclosure. This allows the battery enclosure to be installed well onto the main body of the electrical device with minimal modifications to the support and covering layer.

[0013] In some embodiments, the hardness of the main pad layer is greater than or equal to 32HB, and the hardness of the first sleeve is greater than or equal to 32HB.

[0014] In this embodiment, the hardness of the main pad layer is greater than or equal to 32HB, and the hardness of the first sleeve is greater than or equal to 32HB. This results in a relatively high hardness of the main pad layer and the first sleeve, which allows the first sleeve to better support the main pad layer. This helps to reduce the creep of the main pad layer under long-term action and can better suppress the torque attenuation of the threaded connection structure that locks the housing. The threaded connection structure that locks the housing can more firmly lock the housing.

[0015] In some embodiments, the material of the main pad layer is a copper alloy, aluminum alloy, or steel; and / or, the material of the first sleeve is a copper alloy, aluminum alloy, or steel.

[0016] In this embodiment, materials such as copper alloy, aluminum alloy, or steel exhibit relatively small creep under prolonged external force, and the main pad layer is made of copper alloy, aluminum alloy, or steel; and / or, the first sleeve is made of copper alloy, aluminum alloy, or steel, which helps to suppress torque attenuation of the threaded connection structure that locks the housing.

[0017] In some embodiments, the first sleeve includes two sub-sleeves arranged axially along the receiving hole, each sub-sleeve being connected to the main pad layer at a corresponding end, and when the mounting bracket is in a locked state, the two sub-sleeves abut against each other at their adjacent ends.

[0018] In this embodiment, when the mounting component is in a locked state, the two sub-sleeves abut against each other at their closest ends. The locking force of the threaded connection structure that locks the housing acts on the main pad layer. The two abutting sub-sleeves exert a reaction force on the main pad layer to support it. The locking force of the threaded connection structure that locks the housing is transmitted through the main pad layer to the abutting sub-sleeves. By bearing the load through the abutting sub-sleeves, the transmission of the locking force of the threaded connection structure that locks the housing to the covering layer is reduced, thus inhibiting the creep of the covering layer. Each sub-sleeve is connected to the main pad layer at its corresponding end. The two sub-sleeves can be separated from each other, and each sub-sleeve can be inserted into the receiving hole from its corresponding end, making it relatively easy to install each sub-sleeve and the main pad layer connected to the sub-sleeves.

[0019] In some embodiments, each of the sub-sleeves is integrally formed with the corresponding main pad layer.

[0020] In this embodiment, each sub-sleeve is integrally formed with the corresponding main pad layer, and the sub-sleeve and the main pad layer have good integrity, so the main pad layer can be well supported by the sub-sleeve.

[0021] In some embodiments, the two sub-sleeves abut at their close ends, and at least one end of the main pad layer is spaced apart from the covering layer along the axial direction of the receiving hole.

[0022] In this embodiment, when the two sub-sleeves are in contact at their close ends, the main pad layer is arranged at least once along the axial direction of the receiving hole and the covering layer, so that there is a certain distance between the main pad layer and the covering layer. This provides a certain buffer space for the processing error of the mounting component, so that when the mounting component is released from the locking state, the close ends of the two sub-sleeves can also fully contact each other.

[0023] In some embodiments, the main pads at both ends are arranged at intervals from the covering layer along the axial direction of the receiving hole.

[0024] In this embodiment, the two main pads are arranged at intervals with the covering layer along the axial direction of the receiving hole. Both main pads have reserved space to buffer processing errors, which facilitates the installation of each main pad and the sub-sleeve connected to the main pad.

[0025] In some embodiments, the minimum distance between the main pad layer at each end and the covering layer along the axial direction of the receiving hole is a preset distance, which is less than or equal to 0.5 mm.

[0026] In this embodiment, the preset distance is less than or equal to 0.5mm. The preset distance is appropriate and can reduce the possibility of the mounting component swaying relative to the box in the locked state due to an excessively large preset distance.

[0027] In some embodiments, when the mounting component is disengaged, the two sub-sleeves are arranged axially spaced along the receiving hole, and the main pads at both ends are in contact with the covering layer.

[0028] In this embodiment, the two main pads are in contact with the covering layer. The machining error of the mounting component is buffered by the space between the two sub-sleeves along the axial spacing of the receiving hole, so that each terminal sleeve and the main pad connected to the sub-sleeve can be connected relatively easily.

[0029] In some embodiments, the outer surface of the covering layer includes a second surface, which is connected to the first surfaces at both ends. The dimension of the second surface along the axial direction of the receiving hole is a first dimension. The minimum distance between the end face of the sub-sleeve at one end away from the corresponding main pad and the corresponding main pad along the axial direction of the receiving hole is a second dimension. The minimum distance between the end face of the sub-sleeve at the other end away from the corresponding main pad and the corresponding main pad along the axial direction of the receiving hole is a third dimension. The difference between the first dimension and the second dimension and the third dimension is the gap dimension, which is less than or equal to 0.4 mm.

[0030] In this embodiment, the gap size is less than or equal to 0.4mm, which makes the gap size more suitable. This provides a certain buffer space for the processing error of the mounting component, facilitates the installation of the sub-sleeve and the main pad layer connected to the sub-sleeve, and reduces the possibility that the two sub-sleeves will be difficult to abut when the mounting component is in a locked state due to the excessive gap size.

[0031] In some embodiments, the outer surface of the first sleeve is spaced apart from the inner surface of the receiving hole, and the distance between the outer surface of the first sleeve and the inner surface of the receiving hole is less than or equal to 0.4 mm.

[0032] In this embodiment, the outer surface of the first sleeve and the inner surface of the receiving hole are spaced apart, and there is a gap between the outer surface of the first sleeve and the inner surface of the receiving hole, which facilitates the smooth installation of the first sleeve into the receiving hole. The distance between the outer surface of the first sleeve and the inner surface of the receiving hole is less than or equal to 0.4 mm, which can reduce the possibility of the mounting component swaying relative to the housing due to an excessively large distance between the outer surface of the first sleeve and the inner surface of the receiving hole.

[0033] In some embodiments, the mounting component further includes a first adhesive layer disposed between the main pad layer and the cover layer, the first adhesive layer being bonded to the main pad layer and the cover layer respectively.

[0034] In this embodiment of the application, the mounting component can be fixed to the box in a relatively simple way by using the first adhesive layer.

[0035] In some embodiments, the main pad layer has a retaining edge that protrudes from the main pad layer toward the first adhesive layer along the axial direction of the receiving hole.

[0036] In this embodiment, the main pad layer is enclosed by a protruding baffle to form a space that can accommodate the cavity layer, which can reduce the escape of the first adhesive layer to a certain extent.

[0037] In some embodiments, the retaining edge is located on the side of the main pad layer opposite to the receiving hole along the radial direction of the receiving hole.

[0038] In this embodiment, along the radial direction of the receiving hole, the retaining edge is located on the side of the main pad layer away from the receiving hole, so that there is a large space between the retaining edge and the first sleeve along the radial direction of the receiving hole to accommodate the first adhesive layer, which is beneficial to the firm bonding between the main pad layer and the covering layer.

[0039] In some embodiments, the minimum distance between the outline of the receiving hole and the outer outline of the covering layer is greater than or equal to 3 mm when projected along the axial direction of the receiving hole.

[0040] In this embodiment, the minimum distance between the outline of the receiving hole and the outer outline of the covering layer is greater than or equal to 3mm, and the box has sufficient thickness between the inner and outer surfaces of the receiving hole for support, reducing the possibility of the box being crushed when the mounting components are in a locked state.

[0041] In some embodiments, the mounting box further includes a cover disposed on the box body, wherein the wall thickness of the covering layer corresponding to the first surface of the receiving hole on the side facing the cover along the axial direction of the receiving hole is greater than the wall thickness of the covering layer at other locations.

[0042] In this embodiment, the wall thickness of the covering layer corresponding to the first surface on the side of the receiving hole facing the box cover along the axial direction of the receiving hole is greater than the wall thickness of the covering layer at other locations. By increasing the wall thickness of the covering layer corresponding to the first surface on the side of the receiving hole facing the box cover along the axial direction of the receiving hole, the main pad layer on the side of the first sleeve facing the box cover is arranged in a more suitable position.

[0043] In some embodiments, the support includes:

[0044] An expansion beam having at least one slot located on the side of the expansion beam opposite to the battery cell;

[0045] Each of the slots is provided with a cover, at least one of the covers is a lifting cover, the shell wall of the lifting cover includes a lifting side wall, the lifting side wall is located on the side of the cover facing away from the receiving hole along the radial direction of the receiving hole, the lifting side wall forms a lifting hole, the thickness of the lifting side wall is greater than the thickness of the shell walls of all the covers except the lifting side wall, the receiving hole penetrates the cover and the expansion beam, and the axial direction of the receiving hole is arranged intersecting the axial direction of the lifting hole.

[0046] In this embodiment, the hollow structure formed by the expansion beam of the casing helps reduce the weight of the support. The lifting sidewall has lifting holes, through which the battery pack can be lifted to the corresponding hanging installation position. The thicker lifting sidewall helps to bear the load during the lifting process. The receiving hole penetrates the casing and the expansion beam, allowing the load of the battery pack being hung at the receiving hole to be transferred to the casing and the expansion beam. Sharing the load of the pack at the receiving hole by the casing and the expansion beam improves the load-bearing capacity of the pack. The axial direction of the receiving hole intersects with the axial direction of the lifting hole, reducing the mutual influence between the two. When the pack is lifted and held in the corresponding hanging installation position through the lifting hole, the battery pack can be locked at the receiving hole.

[0047] In some embodiments, at least one of the slots is a lifting slot, the lifting cover is located within the lifting slot, and the expansion beam includes:

[0048] Main support, wherein the slot is formed on the side of the main support opposite to the battery cell;

[0049] An end plate is connected to the side of the main support away from the battery cell. The end plate is provided at both ends of the receiving hole along the axial direction of the receiving hole, and the receiving hole penetrates at least through both ends of the end plate.

[0050] A support plate is connected between the end plates at both ends, and the support plate, the main support, and the end plates at both ends form the hoisting groove.

[0051] In this embodiment, the support plate, main support, and end plates at both ends form a lifting groove. The lifting side wall of the lifting cover inside the lifting groove is relatively thick and has a good load-bearing capacity. The receiving hole penetrates through the end plates at both ends, so that the load borne by the mounting component installed at the receiving hole can be transferred through the end plate to the main support and the relatively thick lifting side wall on the cover. The support plate is connected between the end plates at both ends to enhance the load-bearing capacity of the end plates at both ends, so that the box can better bear the load transferred by the mounting component.

[0052] In some embodiments, the support plate, the main support, and the end plates at both ends are further configured to form a slot located on the side of the support plate opposite to the lifting groove, and the receiving hole further penetrates the support plate.

[0053] In this embodiment, the two end plates are supported by the support plates, and the two end plates have good load-bearing capacity near the support plates. The receiving hole penetrates the two end plates and the support plates, so that the load borne by the mounting component installed in the receiving hole can be well borne by the end plates and the support plates, thereby improving the load-bearing capacity of the box at the receiving hole.

[0054] In some embodiments, the support is made of foamed material or reinforced composite material.

[0055] In this embodiment, the support made of reinforced composite material has good support strength, which is beneficial to improving the load-bearing capacity of the box.

[0056] In some embodiments, the covering layer includes:

[0057] A first covering layer surrounds the receiving cavity, and the material of the first covering layer is an insulating reinforced composite material;

[0058] The second cover layer, the support body is located in the space enclosed by the first cover layer and the second cover layer, the material of the second cover layer is a reinforced composite material, the density of the second cover layer is less than the density of the first cover layer, and the receiving hole penetrates the support body and the second cover layer.

[0059] In this embodiment, the first coating layer forms a cavity, and the battery cell assembly located within the cavity is close to, and may even be in contact with, the first coating layer. The first coating layer has good insulation properties, which is beneficial for insulating the battery cells within the cavity. The density of the second coating layer is lower than that of the first coating layer, which is beneficial for the overall lightweighting of the casing. The denser first coating layer is beneficial for improving insulation performance.

[0060] In some embodiments, the hardness of the main pad layer and the hardness of the first sleeve are both greater than the hardness of the covering layer.

[0061] In this embodiment, the main pad layer and the first sleeve have relatively high hardness, and the creep of the main pad layer and the first sleeve is small under long-term load, which is beneficial to suppressing the torque attenuation of the threaded connection structure that locks the housing.

[0062] In some embodiments, the mounting box further includes a cover over the box body, the box body and the cover being arranged in a first direction, the box body further includes a base, the base being connected to the support body along the first direction towards the cover, the surface of the base along the first direction towards the cover being at least partially exposed on the support body, the base being made of metal, and the battery device further includes a preset connector, the preset connector being installed on the base along the first direction towards the cover.

[0063] In this embodiment, since the base and the support are connected along the first direction toward the side of the box cover, and the surface of the base along the first direction toward the side of the box cover is at least partially exposed to the support, the metal base can provide a foundation for the box body to be installed and locked on the side of the box cover. The preset connector can be installed on the base, so that the side of the box body toward the box cover can be assembled well. The assembly structure located on the side of the box body toward the box cover along the arrangement direction of the box body and the box cover can be assembled well onto the box body through the preset connector.

[0064] In some embodiments, the base includes:

[0065] Mounting plate with mounting holes;

[0066] The second sleeve is installed on the mounting plate, the second sleeve passes through the mounting hole, the second sleeve protrudes from the mounting plate on the side opposite to the box cover along the axial direction of the mounting hole, the second sleeve has an internal thread, the preset connector is threadedly connected to the internal thread of the second sleeve, the second sleeve and / or the mounting plate are connected to the support body, and the surface of the mounting plate facing the box cover along the first direction and / or the surface of the second sleeve facing the box cover along the first direction are at least partially exposed on the support body.

[0067] In this embodiment, the pre-connector and the second sleeve are threaded together, making installation between them easier. The second sleeve protrudes from the side of the mounting plate opposite to the cover along the axial direction of the mounting hole. This design allows for a sufficient length of thread along the axial direction of the mounting hole, ensuring a more secure installation between the pre-connector and the second sleeve. Furthermore, it reduces the axial dimension of the mounting plate along the mounting hole, resulting in a thinner mounting plate and reduced weight. The structure of the second sleeve and the mounting plate effectively achieves both a secure connection and reduced weight of the mounting plate.

[0068] In some embodiments, the second sleeve includes:

[0069] A cylindrical body is connected to the mounting plate, and the cylindrical body passes through the mounting hole;

[0070] The threaded sleeve is threaded to the cylinder and has an internal thread that is threaded to the preset connector.

[0071] In this embodiment, by setting a threaded sleeve, the internal thread of the cylinder can be protected to a certain extent. When the threaded sleeve is worn due to repeated disassembly and reassembly between the preset connector and the threaded sleeve, the threaded sleeve can be unscrewed from the cylinder and replaced with a new threaded sleeve. Maintenance is convenient and does not require replacement of the entire mounting base, which helps to reduce maintenance costs.

[0072] In some embodiments, the thickness of the mounting plate is 1mm to 5mm.

[0073] In this embodiment, the thickness of the mounting plate is 1mm to 5mm, which ensures that the mounting plate has a certain thickness to meet the basic strength requirements, and the thickness of the mounting plate is not too thick, which helps to reduce costs.

[0074] In some embodiments, the thickness of the mounting plate is 2mm to 3mm.

[0075] In this embodiment, the thickness of the mounting plate is 2mm to 3mm, which ensures that the mounting plate has a certain thickness to meet the basic strength requirements, and the thickness of the mounting plate is not too thick, which helps to reduce costs.

[0076] In some embodiments, at least one of the bases is a first base, a preset connector connected to the first base is a first connector, the support body has a side beam for supporting the box cover, the first base is connected to the side beam along the first direction toward the box cover, and the first connector passes through the box cover to install the box cover onto the box body.

[0077] In this embodiment, the first base made of metal can provide better support for the installation of the lid. When the first connector passing through the lid is connected to the first base to install the lid on the box, the first base made of metal can reduce deformation, provide better support for the installation of the lid, and improve the sealing between the lid and the box.

[0078] In some embodiments, the first base is annular in shape and surrounds the housing circumferentially around the receiving cavity.

[0079] In this embodiment, the first base made of annular metal material surrounds the box body around the circumference of the receiving cavity, so that the box body can be well supported, which helps to improve the sealing between the box body and the box cover.

[0080] In some embodiments, the first base is in the shape of a closed ring.

[0081] In this embodiment, the first base is in the shape of a closed ring, which is conducive to the more uniform load-bearing of the first base as a whole, providing a full-circle sealing support for the box, making the box and the lid press more tightly together, and improving the sealing performance between the box and the lid.

[0082] In some embodiments, at least one of the bases is a second base, and a preset connector connected to the second base is a second connector. The support has an expansion beam, and the second base is connected to the expansion beam along a first direction toward the side of the box cover. The expansion beams are provided on opposite sides of the battery cell assembly to withstand the expansion force of the battery cell. The battery device also includes a pull plate spanning the expansion beams on both sides. The pull plate is provided with the second connector at both ends along the arrangement direction of the expansion beams on both sides. The second connector at each end passes through the corresponding pull plate so that the pull plate is installed in the box at the position corresponding to the expansion beam.

[0083] In this embodiment, a second metal base provides support for the mounting and locking of the pull plate at the expansion beam. A second connector, passing through the pull plate and connected to the second base, securely locks the pull plate near the expansion beam. With both ends of the pull plate locked to the expansion beam via corresponding second bases and second connectors, deformation of the two expansion beams away from each other is suppressed, allowing the two expansion beams to better resist the expansion force of the battery cell assembly and inhibit the expansion of the battery cells.

[0084] In some embodiments, the surface of the base facing the lid along the first direction is adhered to the covering layer.

[0085] In this embodiment, since the surface of the base facing the lid along the first direction is bonded to the covering layer, the pre-set connector passes through the pull plate, transmitting the force of the pull plate pressing against the covering layer to the base bonded to the covering layer through the covering layer. The base provides support for the pull plate to be installed and locked. The covering layer can cover the surface of the base facing the lid along the first direction, reducing the exposure of the base.

[0086] In some embodiments, the mounting box further includes a cover over the box body, the box body further includes a preset support, at least one of the mounters is a hanging device, the preset support is located on the side of the covering layer facing the support body, the preset support is connected to the support body, the preset support is laid on the side of the receiving cavity away from the box cover to support the battery cell assembly, the hanging device has a mounting hole for hanging the box body, the hanging device includes a mounting member, the mounting member is connected to the preset support so that the load borne by the mounting hole is transmitted to the preset support through the mounting member.

[0087] In this embodiment, a pre-set support is laid on the side of the receiving cavity away from the box cover to support the battery cell assembly. The pre-set support has a good load-bearing capacity. The mounting part of the hanging device is connected to the pre-set support so that the load on the mounting hole of the hanging device can be well transferred to the pre-set support through the mounting part. Thus, the load at the mounting hole is shared by the pre-set support, which helps to improve the load-bearing capacity of the box and allows the battery device to be well hung on the electrical device.

[0088] In some embodiments, the arrangement direction of the housing and the lid is a first direction, at least one of the mounting members is a first mounting member, the first mounting member and the receiving cavity are arranged along a second direction, the second direction and the first direction are arranged intersecting, the preset support is connected to the first mounting member on both sides along the second direction, and the first mounting member has the mounting hole formed.

[0089] In this embodiment, the preset support is connected to the first mounting members on both sides of the opposite sides along the second direction. The first mounting members on both sides bear the hanging load at the corresponding mounting holes, so that the battery device is subjected to relatively uniform force on both sides along the second direction.

[0090] In some embodiments, the support has expansion beams, and the battery cell assembly is provided with expansion beams on opposite sides along a third direction, the third direction being arranged to intersect the first direction and the second direction respectively.

[0091] In this embodiment, the arrangement direction of the two expansion beams is a third direction, which intersects with the first direction and the second direction respectively. This makes the arrangement direction of the two expansion beams and the arrangement direction of the two first mounting parts bearing the hanging load in two different directions. The hanging load at the two first mounting parts has less interference with the force exerted by the expansion beams on the battery cell assembly to resist the expansion of the battery cell.

[0092] In some embodiments, the first mounting member has locking surfaces on opposite sides along the axial direction of the mounting hole, and the projection area of ​​the locking surfaces along the axial direction of the mounting hole is offset from the projection area of ​​the covering layer along the axial direction of the mounting hole.

[0093] In this embodiment, since the projection area of ​​the locking surface along the axial direction of the mounting hole is offset from the projection area of ​​the covering layer along the axial direction of the mounting hole, the locking surface of the first mounting member is exposed in the covering layer. This allows the force applied to the box by the fastener used to hang the box to act on the locking surface to avoid the covering layer, reducing the possibility that the covering layer will creep under the locking force of the fastener, causing the torque of the fastener to lock the box to decrease.

[0094] In some embodiments, the arrangement direction of the housing and the lid is a first direction, at least one of the mounting members is a second mounting member, the second mounting member and the receiving cavity are arranged along a third direction, the third direction is intersected with the first direction, the preset support is connected to the second mounting member on at least one side along the third direction, the hanging device further includes a hanging bracket, the hanging bracket is installed on the side of the covering layer away from the second mounting member, the projection area of ​​the hanging bracket along the third direction and the projection area of ​​the second mounting member along the third direction at least partially overlap, and the hanging bracket forms the mounting hole.

[0095] In this embodiment, the hanging bracket is installed on the side of the covering layer opposite to the second mounting member, facilitating the installation of the mounting holes on the hanging bracket onto the corresponding hanging structure. The projection area of ​​the hanging bracket along a third direction and the projection area of ​​the second mounting member along a third direction at least partially overlap. The second mounting member can better support the hanging bracket, which is beneficial for better transferring the load borne by the hanging bracket at the mounting hole to the preset support through the second mounting member. The load borne by the hanging bracket at the mounting hole is shared by the preset support, improving the load-bearing capacity of the enclosure.

[0096] In some embodiments, the battery device further includes an assembly connector that passes through the hanging bracket, the covering layer, and the second mounting member to mount the hanging bracket to the covering layer at the position corresponding to the second mounting member.

[0097] In this embodiment, the assembly connector is connected to the second mounting component, which enables the assembly connector to securely lock the hanging bracket at the corresponding position of the second mounting component. This facilitates the better transfer of the load on the hanging bracket at the mounting hole to the second mounting component.

[0098] In some embodiments, the second mounting component includes:

[0099] The mounting body has two opposite surfaces along the third direction as target surfaces, and both target surfaces are in contact with the covering layer.

[0100] The transition member is connected to the mounting body and the preset support respectively. The surface of the transition member away from the receiving cavity along the third direction contacts the covering layer. The surface of the transition member facing the receiving cavity along the third direction is at least partially spaced from the covering layer.

[0101] In this embodiment, the target surfaces on both sides of the mounting body along a third direction are in contact with the covering layer, enabling the mounting body to provide better support for the hanging bracket installed at the corresponding position on the covering layer, which is beneficial for the hanging bracket to bear the load better. The load at the mounting hole of the hanging bracket is transferred to the mounting body, and the load transferred to the mounting body can be transferred to the preset support through the transition piece, thereby sharing the load at the mounting hole through the preset support.

[0102] In some embodiments, the transition member extends along the third direction from one side of the target surface of the mounting body to the other side of the target surface; or, the hanging bracket is located on the side of the mounting body away from the receiving cavity along the third direction, and the transition member is located on the side of the mounting body away from the receiving cavity along the third direction.

[0103] In this embodiment, since the transition member extends from one target surface of the mounting body to the other target surface along a third direction, its larger size along the third direction is beneficial for supporting the mounting body. This allows the load transferred from the mounting hole of the hanger bracket to the mounting body to be effectively transferred to the preset support through the transition member. The transition member is located on the side of the mounting body away from the receiving cavity along the third direction, and its smaller size along the third direction helps reduce weight and increase mass energy density. Because the hanger bracket is located on the side of the mounting body away from the receiving cavity along the third direction, placing the transition member on this side allows it to better support the mounting body and the hanger bracket, enabling the load at the mounting hole of the hanger bracket to be effectively transferred to the preset support.

[0104] In some embodiments, the preset support is plate-shaped, and grooves are formed on both sides of the preset support along the arrangement direction of the box body and the box cover. The number of grooves is at least two, and the at least two grooves are arranged sequentially. The grooves on both sides are arranged alternately along the arrangement direction of the at least two grooves.

[0105] In this embodiment, the grooves on both sides are arranged alternately along the arrangement direction of at least two grooves, so that the plate-shaped preset support changes concave and convex alternately, which is beneficial to improve the rigidity of the preset support and make the preset support have better load-bearing capacity.

[0106] In some embodiments, the materials of the hanging device and the preset support are both metal, and / or the material of the support body is foam material.

[0107] In this embodiment, the use of a metal pre-support enhances its load-bearing capacity. The metal hanging device provides better load-bearing capacity, facilitating the transfer of load from the mounting hole to the pre-support via the mounting components. The support body is made of foam material, which has a low density, allowing the support body to fill the internal space of the covering layer with minimal weight, thus reducing the weight of the enclosure.

[0108] In some embodiments, the hanging device is made of steel or aluminum, and / or the preset support is made of steel or aluminum.

[0109] In some embodiments, the stiffness of the preset support is greater than the stiffness of the support body, and the strength of the preset support is greater than the strength of the support body.

[0110] In this embodiment, the pre-support has a large strength, which is beneficial to improving the load-bearing capacity of the pre-support.

[0111] A second aspect of this application provides an electrical device including any of the above-described battery devices, the battery device being used to store or provide electrical energy.

[0112] In some embodiments, the electrical device includes an aircraft.

[0113] Beneficial effects

[0114] The battery device according to the embodiments of this application adds an additional mount to the casing. Different mounts are adapted to address the different problems exhibited by casings with different structures under the load applied by the device body. These mounts bear part of the load applied to the device body of the power-consuming device. While alleviating the different problems of casings with different structures and allowing the casing to be better installed on the device body of the power-consuming device, the original structural modifications to the support and covering layer are minimal or even unnecessary. It almost eliminates the need to replace the original support and covering layer of the casing as a whole. This allows the battery device casing to be better installed on the device body of the power-consuming device with minimal modifications to the support and covering layer. Attached Figure Description

[0115] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0116] Figure 1 This is an assembly diagram of the box body and mounting components according to an embodiment of this application. The diagram shows the side of the box body facing the box cover.

[0117] Figure 2 for Figure 1 A magnified view at position A in the middle;

[0118] Figure 3 This is an assembly drawing of the box body and mounting bracket according to an embodiment of this application. The drawing shows the side of the box body away from the box cover. The drawing shows the cut position. The mounting bracket shown does not represent a specific embodiment.

[0119] Figure 4 for Figure 3 The cross-sectional view at position BB in the middle is shown in the figure, which is an enlarged view. The mounting components shown in the figure do not represent a specific embodiment.

[0120] Figure 5 for Figure 4 An enlarged view at position D shows two sub-sleeves abutting each other, with at least one main pad layer spaced apart from the first surface.

[0121] Figure 6 for Figure 5 A magnified view at position E in the middle;

[0122] Figure 7 for Figure 4 An enlarged view at position D shows two sub-sleeves arranged at intervals in the unlocked state, with the main pads at both ends in contact with the first surface.

[0123] Figure 8 This is an assembly drawing of the housing and mounting components according to an embodiment of this application. The first covering layer is not shown in the drawing, and the second covering layer is not shown either.

[0124] Figure 9 for Figure 8 A magnified view at position F in the middle;

[0125] Figure 10 This is a schematic diagram of the structure of the housing according to an embodiment of this application;

[0126] Figure 11 for Figure 10 A cross-sectional view at position GG in the middle;

[0127] Figure 12 for Figure 3 Sectional view at position CC;

[0128] Figure 13 for Figure 12 A magnified view at position H in the middle;

[0129] Figure 14 for Figure 13 Sectional view at position II in the middle;

[0130] Figure 15 This is an assembly drawing of the second base plate body, the second rivet nut, the fourth connector, and the box cover of the box body according to an embodiment of this application;

[0131] Figure 16 This is an assembly drawing of the box body, box cover, and bottom protective plate according to an embodiment of this application;

[0132] Figure 17 This is an isometric view of the housing according to an embodiment of this application;

[0133] Figure 18 This is an exploded view of the housing according to an embodiment of this application;

[0134] Figure 19 This is a schematic diagram of the structure of the box according to an embodiment of this application, showing the cross-sectional position of the box;

[0135] Figure 20 for Figure 19 A cross-sectional view at position JJ in the middle;

[0136] Figure 21 for Figure 20 A magnified view at position L in the middle;

[0137] Figure 22 This is a schematic diagram of the structure of the first base according to an embodiment of this application;

[0138] Figure 23 for Figure 22 A cross-sectional view at position MM in the middle;

[0139] Figure 24 This is a schematic diagram of the installation box according to an embodiment of this application. The internal structure of the box is cut out in the figure, but the box cover is not cut out.

[0140] Figure 25 for Figure 24 An enlarged view at position N in the middle. The first connector shown in the figure is a bolt. Only the head of the bolt is shown in the figure, not the entire bolt.

[0141] Figure 26 for Figure 19 A cross-sectional view at position KK in the middle;

[0142] Figure 27 for Figure 26 A magnified view at position O in the middle;

[0143] Figure 28 for Figure 26 An enlarged view at position P in the middle. The second connector shown in the figure is a bolt. Only the head of the bolt is shown in the figure, not the entire bolt.

[0144] Figure 29 This is a schematic diagram of the structure of the second base according to an embodiment of this application;

[0145] Figure 30 for Figure 29 A cross-sectional view at position QQ in the middle.

[0146] Figure 31 This is a schematic diagram of the structure of the box according to an embodiment of this application, showing the cross-sectional position of the box;

[0147] Figure 32 This is an isometric view of the housing according to an embodiment of this application; the hanging bracket and connectors are not shown in the figure.

[0148] Figure 33 This is an exploded view of the housing according to an embodiment of this application;

[0149] Figure 34 for Figure 33 A magnified view at position U in the middle;

[0150] Figure 35 for Figure 31 Sectional view at position RR in the middle;

[0151] Figure 36 for Figure 35 A magnified view at position V in the middle;

[0152] Figure 37 for Figure 31The cross-sectional view at position SS in the middle shows that the specific structure of the second mounting component at position F (enlarged in the figure) differs in different embodiments.

[0153] Figure 38 for Figure 37 An enlarged view at position W in the middle. The transition piece in the figure is a metal plate located on the side of the mounting body facing away from the receiving cavity along the third direction. The connecting piece is not shown in the figure.

[0154] Figure 39 for Figure 37 An enlarged view at position W in the middle. The transition piece in the figure is a square steel profile. The transition piece extends from a preset surface on one side of the mounting body along a third direction to a preset surface on the other side. The connecting piece is not shown in the figure.

[0155] Figure 40 for Figure 37 A magnified view at position X in the middle;

[0156] Figure 41 for Figure 31 A magnified view at position T in the middle;

[0157] Figure 42 This is a schematic diagram of the installation box according to an embodiment of this application. The diagram shows the internal cross-sectional structure of the box, but the box cover is not cut in the diagram.

[0158] Figure 43 This application provides schematic diagrams of the structure of fiber fabrics in some battery devices.

[0159] Figure 44 Schematic diagrams of the structure of fiber fabrics in other battery devices provided in embodiments of this application;

[0160] Figure 45 A schematic diagram of the structure of the battery device provided in the embodiments of this application, including a pull plate;

[0161] Figure 46 This is a schematic diagram showing the arrangement of pull plates in some battery devices provided in the embodiments of this application;

[0162] Figure 47 A schematic diagram showing the arrangement of pull plates in some other battery devices provided in the embodiments of this application;

[0163] Figure 48 This is a top view of the pull plate in the battery device provided in the embodiment of this application;

[0164] Figure 49 Provided for the embodiments of this application Figure 48 A schematic diagram of the cross-sectional structure of the YY section.

[0165] Explanation of reference numerals in the attached figures

[0166] 100. Mounting box; 1. Box body; 11. Support body; 111. Expansion beam; 1111. Slot; 1112. Main support; 1113. End plate; 1114. Support plate; 112. Cover; 1121. Lifting side wall; 1122. Lifting hole; 12. Covering layer; 121. First surface; 122. Second surface; 123. First covering layer; 124. Second covering layer; 13. Receiving cavity; 14. Receiving hole; 2. Mounting component; 21. Main pad layer; 211. Edge retainer; 22. First sleeve; 221. Sub-sleeve; 23. First adhesive layer; 3. Box cover;

[0167] 113. Side beam; 125. Bearing part; 1141. Mounting plate; 11411. Mounting hole; 1142. Second sleeve; 11421. Cylinder body; 11422. Threaded sleeve; 115. First base; 116. Second base; 41. First connector; 42. Second connector; 5. Pull plate; 6. Pre-set support; 61. Groove;

[0168] 15. Hanging device; 16. Mounting hole; 161. First hole; 162. Second hole; 17. First mounting component; 171. Locking surface; 172. Annular groove; 173. Weight reduction cavity; 18. Second mounting component; 181. Mounting body; 182. Target surface; 183. Transition component; 19. Hanging bracket;

[0169] 901. First rivet nut; 904. Substrate assembly; 902. First substrate body; 903. Riveting hole; 905. Third connector; 906. Bottom guard plate; 907. Second adhesive layer; 908. Main substrate; 909. Auxiliary substrate; 910. Adhesive storage cavity; 911. First bonding surface; 912. Preset surface; 913. Second bonding surface; 914. Target groove; 915. First wall; 916. Second wall; 917. Second substrate body; 918. Second rivet nut; 919. Fourth connector; 920. Third adhesive layer; 921. Limiting surface;

[0170] C11, First fiber fabric; C111, First fiber; C12, First substrate; C21, Second fiber fabric; C211, Second fiber; C22, Second substrate; 210, Battery cell; 120, Third wall; 610, Main body; 620, Connecting part; 630, First pull plate; 640, Second pull plate. Detailed Implementation

[0171] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0172] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0173] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0174] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0175] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0176] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0177] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0178] In related technologies, when a box-shaped structure consisting of a support and a reinforcing composite material covering is suspended and installed on the main body of an electrical device, different box-shaped structures will exhibit different problems under the suspension load applied by the main body of the device. Replacing the original support and covering of the box as a whole may cause significant changes to the original structure of the support and covering.

[0179] This application embodiment adds an additional mounting device to the enclosure. To address the different problems exhibited by enclosures with different structures under the load applied by the main body of the device, different mounting devices are adapted to each structure. By using different mounting devices, part of the load applied by the main body of the electrical device is supported. In order to alleviate the different problems exhibited by enclosures with different structures and to ensure that the enclosure is well installed on the main body of the electrical device, the original structural modifications to the support and covering layer are minimal or even unnecessary. It is almost unnecessary to replace the original support and covering layer of the enclosure.

[0180] The solutions in this application are not limited to battery devices, but can also be applied to electrical devices that include battery devices.

[0181] This application provides an electrical device, which includes a battery device, and the electrical device stores or provides electrical energy through the battery device.

[0182] In one embodiment, the electrical device further includes a device body, and a battery device is mounted on the device body to supply power to the device body.

[0183] Electrical devices are devices that use electrical energy as their energy source to perform corresponding functions by consuming electrical energy. For example, electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, space shuttles, and spacecraft, etc.

[0184] In some embodiments, the electrical device includes an aircraft.

[0185] Aircraft generally refer to machines that fly within or outside the atmosphere (space), and can include aircraft flying within the atmosphere and spacecraft flying in space. Aircraft can include airplanes, airships, etc., and for example, low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional aircraft, etc. Spacecraft can include airplanes, space shuttles, and spacecraft.

[0186] The main body of a device refers to the main structure that consumes electrical energy to perform its corresponding functions. For example, an electrical device can be a mobile phone, where the main body is the part that enables communication and other functions, powered by individual battery cells or battery packs. Similarly, an electrical device can be a car, where the main body is the part that provides seating and allows the vehicle to move on the road, powered by individual battery cells or battery packs.

[0187] In one embodiment, the battery device may be a battery pack.

[0188] In one embodiment, the battery device may be an energy storage device.

[0189] The battery device in this application embodiment includes a single battery cell. Electrical energy is stored or released through the single battery cell.

[0190] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0191] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0192] A single battery cell includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator disposed between the negative and positive electrodes. During the charging and discharging process of the battery cell, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, disposed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing active ions to pass through. In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0193] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0194] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0195] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0196] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0197] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0198] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0199] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0200] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0201] In some embodiments, the negative electrode can be made of foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode, the surface of the foamed metal may or may not contain a negative electrode active material.

[0202] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0203] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0204] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0205] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0206] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0207] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0208] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0209] Liquid electrolytes include electrolyte salts and solvents.

[0210] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0211] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0212] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell, such as additives that improve the overcharge / fast charge performance of the battery cell, additives that improve the high-temperature performance of the battery cell, and additives that improve the low-temperature performance of the battery cell.

[0213] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0214] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0215] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0216] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0217] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0218] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0219] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0220] In some implementations, the electrode assembly is a stacked structure.

[0221] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0222] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0223] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0224] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0225] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0226] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0227] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0228] For the battery device in this application embodiment, please refer to [link / reference]. Figures 1-16 as well as Figures 31-42 The battery device includes a battery cell assembly, a mounter, and a mounting box 100. The battery cell assembly includes battery cells. The mounting box 100 includes a box body 1, which includes a support body 11 and a covering layer 12 covering the outer surface of the support body 11. The covering layer 12 is made of a reinforced composite material and forms a receiving cavity 13 in which the battery cells are located. The mounter is mounted on the box body 1 and has features for suspending the box body 1.

[0229] At least two battery cells can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration means that at least two battery cells can be connected in both series and parallel configurations.

[0230] The mounting box 100 is a container mainly used to hold individual battery cells. The individual battery cells are located inside the mounting box 100, which serves to protect them.

[0231] Box 1 is the main structure that carries the battery cells.

[0232] For example, the mounting box 100 also includes a cover 3, which is a structure that covers the box body 1. The box body 1 and the cover 3 are manufactured independently and then assembled together. The cover 3 covers the box body 1, and the battery cells are located within the space enclosed by the box body 1 and the cover 3. The fact that the box body 1 and the cover 3 are manufactured independently and then assembled together facilitates the installation of the battery cells into the space enclosed by the box body 1 and the cover 3.

[0233] For example, the box body 1 and the box cover 3 are arranged in the vertical direction.

[0234] The covering layer 12 covers the outer surface of the support 11, and the support 11 fills the covering layer 12 to a certain extent, providing support for the covering layer 12.

[0235] Reinforced composite materials consist of a matrix phase and a reinforcing phase. The matrix phase acts as a bonder, protects the reinforcing phase, and transfers stress caused by external loads to the reinforcing phase. The reinforcing phase is mainly used for load-bearing.

[0236] For example, the matrix phase can be a metal matrix, a resin matrix, or a ceramic matrix.

[0237] For example, the resin matrix can be a thermosetting resin such as epoxy resin or polyurethane.

[0238] For example, the resin matrix can be a thermoplastic resin such as nylon or polypropylene.

[0239] For example, the reinforcing phase can have various shapes, such as fibrous, granular, or flake-like.

[0240] For example, the reinforcing phase may be carbon fiber, glass fiber, aramid fiber or basalt fiber.

[0241] For example, the reinforced composite material can be a continuous fiber reinforced composite material.

[0242] For example, the lid 3 is made of reinforced composite material.

[0243] For example, the support 11 is made of foam material.

[0244] For example, the material of the support 11 can be a thermosetting foam material such as polyurethane or epoxy.

[0245] For example, the material of the support 11 can be a thermoplastic foam material such as polyethylene terephthalate, polyphenylene ether, polypropylene or nylon.

[0246] For example, the mounter is installed on the main body of the electrical appliance.

[0247] For example, the mounting box 100 is suspended and mounted on the main body of the electrical device by means of corresponding locking structures connected to the mounter and the main body of the electrical device respectively.

[0248] It should be noted that, in response to the different problems exhibited by the different structures of the enclosure 1 under the load applied by the main body of the device, different mounting devices are adapted. This mainly means that the corresponding mounting devices are installed on the enclosure 1 during the production stage to address the possible problems of different enclosure 1, rather than replacing different mounting devices for different problems.

[0249] In this embodiment, by adding an additional mount to the housing 1, different mounts are adapted to address the different problems exhibited by housing 1 with different structures under the load applied by the device body. By using different mounts to bear part of the load applied by the device body of the electrical device, the different problems exhibited by housing 1 with different structures are alleviated, and the housing 1 is better installed on the device body of the electrical device. The original structural modifications to the support 11 and the covering layer 12 are small or even almost unnecessary. It is almost unnecessary to replace the original support 11 and the covering layer 12 of the housing 1 as a whole. This allows the housing 1 of the battery device to be better installed on the device body of the electrical device with minimal modifications to the support 11 and the covering layer 12.

[0250] In some embodiments, please refer to Figures 1-11 The housing 1 has a receiving hole 14 that penetrates the support body 11 and the covering layer 12. The outer surface of the covering layer 12 that coincides with the openings at both ends of the receiving hole 14 along the axial direction of the receiving hole 14 is the first surface 121. At least one mount is a mounting mounting component 2. The mounting mounting component 2 includes a main pad layer 21 and a first sleeve 22. The receiving hole 14 is provided with main pad layers 21 at both ends along the axial direction of the receiving hole 14. The first surface 121 at both ends is located between the two main pad layers 21. The first sleeve 22 passes through the receiving hole 14. The two ends of the first sleeve 22 are respectively connected to the corresponding main pad layer 21.

[0251] The mounting component 2 is mainly used to bear the force applied by the threaded connection structure that locks the housing 1 to the housing 1.

[0252] The main pad layer 21 is used to separate the threaded connection structure that locks the housing 1 from the covering layer 12 of the housing 1. The force applied by the threaded connection structure that locks the housing 1 to lock the housing 1 is applied to the main pad layer 21.

[0253] The first sleeve 22 is used to support the main pads 21 at both ends of the first sleeve 22.

[0254] For example, the threaded connection structure that locks the housing 1 can be a bolt.

[0255] For example, the main pad 21 and the first sleeve 22 are both made of metal.

[0256] The first sleeve 22 passes through the mounting hole, and its two ends are respectively connected to the corresponding main padding layer 21. When the mounting device 2 is in the locked state, the first sleeve 22 supports the two main padding layers 21. The support of the two main padding layers 21 by the first sleeve 22 prevents the two main padding layers 21 from getting closer to each other. For example, the hardness of the main padding layer 21 and the hardness of the first sleeve 22 are both greater than the hardness of the covering layer 12.

[0257] It should be noted that when the mounting component 2 is in the locked state, the first sleeve 22 supports the two main pads 21 to prevent the two main pads 21 from getting closer to each other.

[0258] In this embodiment, a main pad layer 21 is provided at both ends of the receiving hole 14 along the axial direction of the receiving hole 14. The first surfaces 121 at both ends are located between the two main pad layers 21. The two main pad layers 21 cover the first surfaces 121 at both ends of the covering layer 12, so that the two main pad layers 21 can separate the covering layer 12 and the threaded connection structure that locks the box 1. The force applied by the threaded connection structure that locks the box 1 mainly acts on the main pad layer 21 and is supported by the first sleeve 22. The force applied by the threaded connection structure that locks the box 1 is mainly borne by the mounting bracket 2, which reduces the load on the covering layer 12 near the first surface 121 at the receiving hole 14. This helps to reduce the possibility of creep in the covering layer 12, which is made of reinforced composite material, thereby suppressing the torque attenuation of the threaded connection structure that locks the box 1 and making it easier for the threaded connection structure that locks the box 1 to lock the box 1 more firmly. By adding an additional mounting component 2 to the housing 1, the load is mainly applied to the main pad layer 21 of the mounting component 2. While reducing the creep of the covering layer 12 to suppress the torque attenuation of the threaded connection structure that locks the housing 1, the original structural modifications to the support body 11 and the covering layer 12 are minimal or even unnecessary. It is almost unnecessary to replace the original support body 11 and the covering layer 12 of the housing 1 as a whole. This allows the housing 1 of the battery device to be installed well onto the main body of the electrical device with minimal modifications to the support body 11 and the covering layer 12.

[0259] In some embodiments, please refer to Figures 5-7 The hardness of the main pad layer 21 is greater than or equal to 32HB, and the hardness of the first sleeve 22 is greater than or equal to 32HB.

[0260] HB is the unit of Brinell hardness.

[0261] For example, the hardness of the main padding layer 21 can be 32HB, 33HB, 35HB, 38HB, 40HB, 45HB, 50HB or 60HB.

[0262] In this embodiment, the hardness of the main pad layer 21 is greater than or equal to 32HB, and the hardness of the first sleeve 22 is greater than or equal to 32HB. This results in a relatively high hardness for both the main pad layer 21 and the first sleeve 22. The first sleeve 22 can better support the main pad layer 21, which helps to reduce the creep of the main pad layer 21 under long-term action. It can also better suppress the torque attenuation of the threaded connection structure that locks the housing 1, and the threaded connection structure that locks the housing 1 can more firmly lock the housing 1.

[0263] It is understandable that the hardness of the main pad layer 21 and the hardness of the first sleeve 22 can be adjusted appropriately. For example, the hardness of the main pad layer 21 can be less than 32HB, and the hardness of the first sleeve 22 can be less than 32HB.

[0264] In some embodiments, please refer to Figures 5-7 The main pad 21 is made of copper alloy, aluminum alloy or steel; and / or the first sleeve 22 is made of copper alloy, aluminum alloy or steel.

[0265] For example, the material of the main pad layer 21 is copper alloy, aluminum alloy or steel.

[0266] For example, the first sleeve 22 is made of copper alloy, aluminum alloy or steel.

[0267] For example, the main pad layer 21 is made of copper alloy, aluminum alloy or steel, and the first sleeve 22 is made of copper alloy, aluminum alloy or steel.

[0268] In this embodiment, materials such as copper alloy, aluminum alloy, or steel exhibit relatively small creep under prolonged external force. The main pad layer 21 is made of copper alloy, aluminum alloy, or steel; and / or the first sleeve 22 is made of copper alloy, aluminum alloy, or steel, which helps to suppress torque attenuation of the threaded connection structure that locks the housing 1.

[0269] It is understandable that the materials of the main pad layer 21 and the first sleeve 22 are not specifically limited, as long as they can suppress creep and reduce torque attenuation to a certain extent.

[0270] In some embodiments, please refer to Figures 5-7 The first sleeve 22 includes two sub-sleeves 221 arranged axially along the receiving hole 14. Each sub-sleeve 221 is connected to the main pad layer 21 at the corresponding end. When the mounting bracket 2 is in the locked state, the two sub-sleeves 221 abut against each other at their close ends.

[0271] The two sub-sleeves 221 abut against each other at their close ends, the two sub-sleeves 221 are in contact but not connected together, the two sub-sleeves 221 are not fixed together, and the two sub-sleeves 221 can be separated.

[0272] The locked state is the state in which a force is applied to the mounting component 2 along the axial direction of the receiving hole 14, so that the mounting component 2 is pressed tightly along the axial direction of the receiving hole 14.

[0273] For example, the locking state can be a state in which a threaded connection structure for locking the housing 1 tightens and locks the housing 1 through a threaded connection, so that the housing 1 is installed on the main body of the electrical device.

[0274] For example, each sub-sleeve 221 is cylindrical in shape.

[0275] In this embodiment, when the mounting component 2 is in a locked state, the two sub-sleeves 221 abut against each other at their close ends. The locking force of the threaded connection structure that locks the housing 1 acts on the main pad layer 21. The two abutting sub-sleeves 221 exert a reaction force on the main pad layer 21 to support it. The locking force of the threaded connection structure that locks the housing 1 is transmitted through the main pad layer 21 to the abutting sub-sleeves 221. The abutting sub-sleeves 221 bear the load, reducing the transmission of the locking force of the threaded connection structure that locks the housing 1 to the covering layer 12 and suppressing the creep of the covering layer 12. Each sub-sleeve 221 is connected to the corresponding end of the main pad layer 21. The two sub-sleeves 221 can be separated from each other. Each sub-sleeve 221 can be inserted into the receiving hole 14 from the corresponding end of the receiving hole 14, making it easier to install each sub-sleeve 221 and the main pad layer 21 connected to the sub-sleeve 221.

[0276] It is understood that the specific structure of the first sleeve 22 is not limited. Exemplarily, the first sleeve 22 is a one-piece molded structure, extending from one end of the main pad 21 to the other end of the main pad 21 along the axial direction of the receiving hole 14. Exemplarily, the first sleeve 22 is a one-piece molded structure, extending from one end of the main pad 21 to the other end of the main pad 21 along the axial direction of the receiving hole 14. The first sleeve 22 can be integrally molded with one end of the main pad 21, and the first sleeve 22 can be welded to the other end of the main pad 21.

[0277] In some embodiments, please refer to Figures 5-7 Each sub-sleeve 221 is integrally formed with the corresponding main pad layer 21.

[0278] In this embodiment of the application, each sub-sleeve 221 is integrally formed with the corresponding main pad 21. The sub-sleeve 221 and the main pad 21 have good integrity and can support the main pad 21 well.

[0279] It is understood that the connection method between the sub-sleeve 221 and the main pad 21 is not limited. Exemplarily, each sub-sleeve 221 is welded to the main pad 21 at the corresponding end. Exemplarily, one sub-sleeve 221 is welded to the main pad 21 at the corresponding end, and the other sub-sleeve 221 is integrally formed with the main pad 21 at the corresponding end.

[0280] In some embodiments, please refer to Figure 5 and Figure 6 Two sub-sleeves 221 abut against each other at their close ends, and at least one main pad layer 21 is arranged at intervals with the covering layer 12 along the axial direction of the receiving hole 14.

[0281] There is no defined state when the two sub-sleeves 221 are in contact with each other at their closest ends. Regardless of whether the mounting component 2 is in a locked state, the two sub-sleeves 221 are in contact with each other at their closest ends.

[0282] For example, the main pad layer 21 and the first surface 121 of the covering layer 12 are arranged at intervals.

[0283] In this embodiment, when the two sub-sleeves 221 are abutting at their close ends, the main pad 21 is arranged at least one end along the axial direction of the receiving hole 14 and the covering layer 12 at intervals, so that the main pad 21 and the covering layer 12 are spaced at a certain distance, leaving a certain buffer space for the processing error of the mounting component 2, so that when the mounting component 2 is untied, the close ends of the two sub-sleeves 221 can also fully abut.

[0284] In some embodiments, please refer to Figure 5 and Figure 6 The main pads 21 at both ends are arranged at intervals with the covering layer 12 along the axial direction of the receiving hole 14.

[0285] In this embodiment, the two main pads 21 are arranged at intervals with the covering layer 12 along the axial direction of the receiving hole 14. Both main pads 21 have reserved space to buffer processing errors, which facilitates the installation of each main pad 21 and the sub-sleeve 221 connected to the main pad 21.

[0286] It is understood that the arrangement of the main pad layer 21 is not limited. For example, along the axial direction of the receiving hole 14, the main pad layer 21 at one end is arranged at a distance from the covering layer 12, and the main pad layer 21 at the other end can contact the covering layer 12.

[0287] In some embodiments, please refer to Figure 5 and Figure 6 The minimum distance between the main pad layer 21 at each end and the covering layer 12 along the axial direction of the receiving hole 14 is a preset distance, which is less than or equal to 0.5mm.

[0288] The minimum distance between the main pad layer 21 at each end and the covering layer 12 along the axial direction of the receiving hole 14 is a preset distance. The main pad layer 21 and the covering layer 12 are arranged at intervals, and this preset distance is greater than zero.

[0289] For example, please refer to Figure 6 The minimum distance between the main pad layer 21 at each end and the covering layer 12 along the axial direction of the receiving hole 14 is a preset distance, which is D1, and D1≤0.5mm.

[0290] For example, the preset distance can be 0.1mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm or 0.5mm.

[0291] In this embodiment, the preset distance is less than or equal to 0.5mm. The preset distance is appropriate and can reduce the possibility of the mounting component 2 swaying relative to the box 1 in the locked state due to an excessively large preset distance.

[0292] It is understood that the preset distance is not specifically limited. For example, the preset distance may be greater than 0.5mm, depending on the circumstances.

[0293] In some embodiments, please refer to Figure 7 When the mounting component 2 is unsecured, the two sub-sleeves 221 are arranged axially at intervals along the receiving hole 14, and the main pads 21 at both ends are in contact with the covering layer 12 respectively.

[0294] Two sub-sleeves 221 are arranged at intervals, with a certain distance between them, and there is no contact between the two sub-sleeves 221.

[0295] In this embodiment, the two main pads 21 at both ends are in contact with the covering layer 12. The machining error of the mounting bracket 2 is buffered by the space between the two sub-sleeves 221 along the axial spacing of the receiving hole 14, so that each terminal sleeve 221 and the main pad 21 connected to the sub-sleeve 221 can be connected relatively easily.

[0296] In some embodiments, please refer to Figure 7 The outer surface of the covering layer 12 includes a second surface 122, which is connected to the first surfaces 121 at both ends. The dimension of the second surface 122 along the axial direction of the receiving hole 14 is the first dimension. The minimum distance between the end face of one terminal sleeve 221 away from the corresponding main pad 21 and the corresponding main pad 21 along the axial direction of the receiving hole 14 is the second dimension. The minimum distance between the end face of the other terminal sleeve 221 away from the corresponding main pad 21 and the corresponding main pad 21 along the axial direction of the receiving hole 14 is the third dimension. The difference between the first dimension and the second and third dimensions is the gap dimension, which is less than or equal to 0.4 mm.

[0297] It should be explained that the dimension of the second surface 122 along the axial direction of the receiving hole 14 is the first dimension, and the intersection line of the first surface 121 and the second surface 122 is the preset intersection line. The preset intersection line at each end is located at the position where the edge of the corresponding first surface 121 along the radial direction of the receiving hole 14 toward the second surface 122 is at the position where the axial distance between the corresponding first surface 121 and the other end of the first surface 121 along the receiving hole 14 is the largest.

[0298] For example, please refer to Figure 7 The dimension of the second surface 122 along the axial direction of the receiving hole 14 is the first dimension, which is D2. The minimum distance between the end face of one terminal sleeve 221 away from the corresponding main pad 21 and the corresponding main pad 21 along the axial direction of the receiving hole 14 is the second dimension, which is D3. The minimum distance between the end face of the other terminal sleeve 221 away from the corresponding main pad 21 and the corresponding main pad 21 along the axial direction of the receiving hole 14 is the third dimension, which is D4. The gap dimension is D5, where D5 = D2 - D3 - D4, and D5 ≤ 0.4 mm.

[0299] For example, please refer to Figure 7 The second surface 122 has rounded corners, transitioning to the first surface 121 through these rounded corners. The intersection line of the rounded corners and the first surface 121 is a preset intersection line. Near the edge of each end of the first surface 121 along the radial direction of the receiving hole 14 towards the second surface 122, the distance between the preset intersection line and the other end of the first surface 121 along the axial direction of the receiving hole 14 is the largest. The rounded corners belong to the second surface 122, not the first surface 121. The first dimension of the second surface 122 along the axial direction of the receiving hole 14 is the maximum span of the rounded corners at both ends of the second surface 122 along the axial direction of the receiving hole 14.

[0300] For example, the first surface 121 and the second surface 122 can both be planar, and the first surface 121 and the second surface 122 can have no rounded corner transition.

[0301] For example, the second surface 122 is arranged radially from the main pad layer 21 along the receiving hole 14.

[0302] With the mounting component 2 unsecured, the two sub-sleeves 221 are arranged axially at intervals along the receiving hole 14, with a gap dimension greater than zero.

[0303] For example, the gap size can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm or 0.4mm.

[0304] For example, the minimum distance between the end face of one end of the terminal sleeve 221 away from the corresponding main pad 21 and the corresponding main pad 21 along the axial direction of the receiving hole 14 is: the distance between the end face of one end of the terminal sleeve 221 away from the corresponding main pad 21 and the retaining edge 211 of the corresponding main pad 21 along the axial direction of the receiving hole 14.

[0305] In this embodiment, the gap size is less than or equal to 0.4 mm, which makes the gap size more suitable. This provides a certain buffer space for the processing error of the mounting component 2, which facilitates the installation of the sub-sleeve 221 and the main pad 21 connected to the sub-sleeve 221. It also reduces the possibility that the two sub-sleeves 221 may not be able to abut each other when the mounting component 2 is in a locked state due to the excessive gap size.

[0306] It is understood that there are no specific limitations on the gap size. For example, the gap size may be greater than 0.4 mm, depending on the circumstances.

[0307] In some embodiments, please refer to Figure 6 The outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 are arranged at intervals, and the distance between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 is less than or equal to 0.4 mm.

[0308] The outer surface of the first sleeve 22 is spaced apart from the inner surface of the receiving hole 14, and a certain distance is separated between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14. The distance between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 is greater than zero.

[0309] For example, please refer to Figure 6 The distance between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 is D6, where D6≤0.4mm.

[0310] For example, the distance between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 can be 0.1mm, 0.13mm, 0.18mm, 0.2mm, 0.23mm, 0.28mm, 0.3mm, 0.33mm, 0.38mm or 0.4mm.

[0311] In this embodiment, the outer surface of the first sleeve 22 is spaced apart from the inner surface of the receiving hole 14, and a gap exists between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14, which facilitates the smooth installation of the first sleeve 22 into the receiving hole 14. The distance between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 is less than or equal to 0.4 mm, which can reduce the possibility of the mounting component 2 swaying relative to the housing 1 due to an excessively large distance between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14.

[0312] It is understood that the arrangement of the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 is not limited. Exemplarily, the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 can be in contact. Exemplarily, the distance between the outer surface of the first sleeve 22 and the inner surface of the receiving hole 14 can be greater than 0.4 mm.

[0313] In some embodiments, please refer to Figure 6 The mounting component 2 also includes a first adhesive layer 23 disposed between the main pad layer 21 and the covering layer 12, the first adhesive layer 23 being bonded to the main pad layer 21 and the covering layer 12 respectively.

[0314] For example, the first adhesive layer 23 may be formed by solidifying liquid adhesive.

[0315] For example, the first adhesive layer 23 may be a solid adhesive.

[0316] In this embodiment of the application, the mounting component 2 can be fixed to the box body 1 in a relatively simple way by bonding with the first adhesive layer 23.

[0317] The method of fixing the main pad layer 21 to the housing 1 is not limited. Exemplarily, the first sleeve 22 is interference-fitted with the wall of the receiving hole 14. Exemplarily, a portion of the structure of the mounting bracket 2 is embedded in the support body 11.

[0318] In some embodiments, please refer to Figure 6 The main pad layer 21 has a retaining edge 211, which protrudes from the main pad layer 21 on the side facing the first adhesive layer 23 along the axial direction of the receiving hole 14.

[0319] The main cushion layer 21 has a retaining edge 211, which is part of the main cushion layer 21.

[0320] For example, the flange 211 is annular in shape.

[0321] For example, the guard 211 surrounds the main pad layer 21.

[0322] For example, the flange 211 is annular in shape.

[0323] In this embodiment, the main pad layer 21 is enclosed by a protruding baffle 211 to form a space that can accommodate the cavity 13 layer, which can reduce the leakage of the first adhesive layer 23 to a certain extent.

[0324] It is understood that the specific structure of the main pad layer 21 is not limited. For example, the main pad layer 21 may not have a protruding retaining edge 211, and the surface of the main pad layer 21 facing the first adhesive layer 23 along the axial direction of the receiving hole 14 may be a plane.

[0325] In some embodiments, please refer to Figure 6 Along the radial direction of the receiving hole 14, the retaining edge 211 is located on the side of the main pad layer 21 opposite to the receiving hole 14.

[0326] For example, the outer surface of the main pad layer 21 along the radial direction of the receiving hole 14 is flush with the outer surface of the retaining edge 211 along the radial direction of the receiving hole 14.

[0327] In this embodiment, along the radial direction of the receiving hole 14, the retaining edge 211 is located on the side of the main pad layer 21 away from the receiving hole 14, so that there is a large space between the retaining edge 211 and the first sleeve 22 along the radial direction of the receiving hole 14 to accommodate the first adhesive layer 23, which is beneficial to the firm bonding between the main pad layer 21 and the covering layer 12.

[0328] It is understood that the specific structure of the retaining edge 211 is not limited. For example, the retaining edge 211 may be located at the center of the main pad layer 21 along the radial direction of the receiving hole 14, close to the center of the main pad layer 21. For example, the retaining edge 211 may be located on the side of the main pad layer 21 facing the first sleeve 22 along the radial direction of the receiving hole 14.

[0329] In some embodiments, please refer to Figure 6 The minimum distance between the outline of the receiving hole 14 and the outer outline of the covering layer 12 is greater than or equal to 3 mm when projected along the axial direction of the receiving hole 14.

[0330] For example, please refer to Figure 6 The minimum distance between the outline of the receiving hole 14 and the outer outline of the covering layer 12 is D7, where D7 ≥ 3 mm.

[0331] For example, the minimum distance between the outline of the receiving hole 14 and the outer outline of the covering layer 12 can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or 11mm.

[0332] In this embodiment, the minimum distance between the outline of the receiving hole 14 and the outer outline of the covering layer 12 is greater than or equal to 3mm. The box 1 has sufficient thickness between the inner and outer surfaces of the receiving hole 14 to provide support, reducing the possibility of the box 1 being crushed when the mounting component 2 is in a locked state.

[0333] In some embodiments, please refer to Figure 6 The mounting box 100 also includes a cover 3 covering the box body 1. The wall thickness of the covering layer 12 located on the first surface 121 of the receiving hole 14 facing the cover 3 along the axial direction of the receiving hole 14 is greater than the wall thickness of the covering layer 12 at other locations.

[0334] For example, the wall thickness of the covering layer 12 located on the first surface 121 of the receiving hole 14 facing the box cover 3 along the axial direction of the receiving hole 14 is D8.

[0335] For example, when the housing 1 of the mounting box 100 is locked to the device body of the electrical device at the receiving hole 14, the receiving hole 14 faces the side of the box cover 3 along its axial direction, i.e., the side of the receiving hole 14 faces the device body along its axial direction. By increasing the wall thickness of the covering layer 12 corresponding to the first surface 121 facing the box cover 3 along the axial direction of the receiving hole 14, the side of the mounting member 2 facing the device body can abut against the device body as much as possible, which is beneficial for the housing 1 to be more firmly installed on the device body.

[0336] In this embodiment, the wall thickness of the covering layer 12 located on the first surface 121 of the receiving hole 14 facing the box cover 3 along the axial direction of the receiving hole 14 is greater than the wall thickness of the covering layer 12 at other locations. By increasing the wall thickness of the covering layer 12 located on the first surface 121 of the receiving hole 14 facing the box cover 3 along the axial direction of the receiving hole 14, the main pad layer 21 of the first sleeve 22 facing the box cover 3 is arranged in a more suitable position.

[0337] In some embodiments, please refer to Figures 8-11 The support 11 includes an expansion beam 111 and a cover 112. The expansion beam 111 has at least one slot 1111, which is located on the side of the expansion beam 111 away from the battery cell. Each slot 1111 contains a cover 112, at least one of which is a lifting cover 112. The wall of the lifting cover 112 includes a lifting sidewall 1121, which is located on the side of the cover 112 away from the receiving hole 14 along the radial direction of the receiving hole 14. The lifting sidewall 1121 forms a lifting hole 1122. The thickness of the lifting sidewall 1121 is greater than the thickness of the other walls of all the covers 112 except for the lifting sidewall 1121. The receiving hole 14 penetrates the cover 112 and the expansion beam 111, and the axial direction of the receiving hole 14 is arranged intersecting the axial direction of the lifting hole 1122.

[0338] For example, please refer to Figure 2 , Figures 5-7 ,as well as Figure 9 The axial direction of the receiving hole 14 is perpendicular to the axial direction of the lifting hole 1122.

[0339] For example, please refer to Figure 10 and Figure 11 The thickness of the hoisting side wall 1121 is D9.

[0340] The expansion beam 111 is mainly used to bear the expansion force of the battery cell during operation.

[0341] For example, at least two battery cells are sandwiched between two expansion beams 111, with the expansion beams 111 bearing the expansion force of the battery cells to suppress battery cell expansion.

[0342] The cover 112 is used to insert into the slot 1111 of the expansion beam 111 to form a hollow structure with the expansion beam 111.

[0343] For example, the expansion beam 111 is made of reinforced composite material.

[0344] For example, the material of the housing 112 is a reinforced composite material.

[0345] In this embodiment, the hollow structure formed by the expansion beam 111 surrounding the casing 112 helps reduce the weight of the support 11. The lifting sidewall 1121 has a lifting hole 1122, through which the battery device housing 1 can be lifted to the corresponding hanging installation position. The relatively thick lifting sidewall 1121 helps to bear the load during the lifting process. The receiving hole 14 penetrates the casing 112 and the expansion beam 111, allowing the load of the battery device housing 1 being suspended at the receiving hole 14 to be transferred to the casing 112 and the expansion beam 111. Sharing the load of the housing 1 being suspended at the receiving hole 14 through the casing 112 and the expansion beam 111 improves the load-bearing capacity of the housing 1. The axial arrangement of the receiving hole 14 and the lifting hole 1122 is intersecting, which can reduce the mutual influence between the lifting hole 1122 and the receiving hole 14. When the box 1 is lifted and held in the corresponding hanging installation position through the lifting hole 1122, the box 1 of the battery device can be locked and installed at the receiving hole 14.

[0346] It is understood that the specific structure of the support 11 is not limited. For example, the cover 112 may not be provided, and the expansion beam 111 may be a solid structure.

[0347] In some embodiments, please refer to Figure 9 At least one slot 1111 is a lifting slot, and a lifting cover 112 is located within the lifting slot. The expansion beam 111 includes a main support 1112, an end plate 1113, and a support plate 1114. The slot 1111 is formed on the side of the main support 1112 opposite to the battery cell. The end plate 1113 is connected to the side of the main support 1112 opposite to the battery cell. An end plate 1113 is provided at both opposite ends of the receiving hole 14 along the axial direction of the receiving hole 14, and the receiving hole 14 penetrates at least through both end plates 1113. The support plate 1114 is connected between the two end plates 1113, and the support plate 1114, the main support 1112, and the two end plates 1113 form a lifting slot.

[0348] The main support 1112 is the main structure of the expansion beam 111.

[0349] End plates 1113 are provided at both ends of the accommodating hole 14 along the axial direction of the accommodating hole 14. The accommodating hole 14 penetrates at least through the end plates 1113. The load of the mounting component 2 installed at the accommodating hole 14 can be transferred to the main support 1112 through the end plates 1113.

[0350] The support body 11 connects the two end plates 1113 and is mainly used to strengthen the end plates 1113.

[0351] For example, both the end plate 1113 and the support 11 are flat plates.

[0352] In this embodiment, the support plate 1114, the main support 1112, and the two end plates 1113 form a hoisting groove. The hoisting sidewall 1121 of the hoisting cover 112 in the hoisting groove is relatively thick and has a good load-bearing capacity. The receiving hole 14 penetrates the two end plates 1113 so that the load borne by the mounting component 2 installed at the receiving hole 14 can be transferred through the end plate 1113 to the main support 1112 and the relatively thick hoisting sidewall 1121 on the cover 112. The support plate 1114 is connected between the two end plates 1113 to enhance the load-bearing capacity of the two end plates 1113, so that the box 1 can better bear the load transferred by the mounting component 2.

[0353] It is understood that the specific structure of the expansion beam 111 with slot 1111 is not limited. Exemplarily, the expansion beam 111 may have a main support 1112 and an end plate 1113, but no support plate 1114, with the main support 1112 and end plate 1113 forming a hoisting groove. Exemplarily, the expansion beam 111 may have a main support 1112 and a support plate 1114, but no end plate 1113, with the main support 1112 and support plate 1114 forming a hoisting groove. Exemplarily, the expansion beam 111 may have a main support 1112 but no end plate 1113 or support plate 1114, with the hoisting groove formed in the expansion beam 111.

[0354] In some embodiments, please refer to Figure 9 The support plate 1114, the main support 1112 and the two end plates 1113 are also arranged to form a slot 1111 located on the side of the support plate 1114 away from the hoisting groove, and the receiving hole 14 also penetrates the support plate 1114.

[0355] For example, the first sleeve 22 spans across the opposite sides of the support body 11, and the first sleeve 22 spans the lifting groove on one side of the support plate 1114 and the slot 1111 on the other side of the support plate 1114.

[0356] In this embodiment, the two end plates 1113 are supported by the support plate 1114. The two end plates 1113 have good load-bearing capacity near the support plate 1114. The receiving hole 14 penetrates the two end plates 1113 and the support plate 1114, so that the load borne by the mounting component 2 installed in the receiving hole 14 can be well borne by the end plates 1113 and the support plate 1114, thereby improving the load-bearing capacity of the box 1 at the receiving hole 14.

[0357] It is understood that the arrangement position of the receiving hole 14 is not limited. For example, the receiving hole 14 can be offset from the support plate 1114, and the receiving hole 14 does not penetrate the support plate 1114.

[0358] In some embodiments, the support 11 is made of a reinforced composite material.

[0359] In this embodiment, the support 11 made of reinforced composite material has good support strength, which is beneficial to improving the load-bearing capacity of the box 1.

[0360] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 4 and Figure 8 The covering layer 12 includes a first covering layer 123 and a second covering layer 124. The first covering layer 123 forms a receiving cavity 13, and the material of the first covering layer 123 is an insulating reinforced composite material. The support body 11 is located within the space enclosed by the first covering layer 123 and the second covering layer 124. The material of the second covering layer 124 is a reinforced composite material, and the density of the second covering layer 124 is less than that of the first covering layer 123. The receiving hole 14 penetrates through the support body 11 and the second covering layer 124.

[0361] For example, the reinforcing phase of the first cladding 123 is glass fiber.

[0362] For example, the reinforcing phase of the second cladding 124 is carbon fiber.

[0363] For example, the second cladding 124 partially covers the outer surface of the end plate 1113.

[0364] For example, the second covering 124 partially covers the outer surface of the housing 112.

[0365] For example, the second cladding 124 partially covers the outer surface of the support plate 1114.

[0366] For example, the outer surface of the expansion beam 111 spans the first cladding 123 and the second cladding 124.

[0367] In this embodiment, the first covering layer 123 surrounds a receiving cavity 13. The battery cell assembly located within the receiving cavity 13 is close to the first covering layer 123 and may even be in contact with it. The first covering layer 123 has good insulation properties, which is beneficial for insulating the battery cells within the receiving cavity 13. The density of the second covering layer 124 is lower than that of the first covering layer 123. The second covering layer 124 is beneficial for the overall lightweighting of the housing 1, while the denser first covering layer 123 is beneficial for improving insulation performance.

[0368] It is understood that the specific structure of the cladding layer 12 is not limited. For example, the material of the cladding layer 12 can be a reinforced composite material with the same reinforcing phase.

[0369] In some embodiments, please refer to Figures 5-7 The hardness of the main pad layer 21 and the hardness of the first sleeve 22 are both greater than the hardness of the covering layer 12.

[0370] For example, the hardness of the main pad layer 21 and the hardness of the first sleeve 22 can be the same.

[0371] For example, the hardness of the main pad layer 21 and the hardness of the first sleeve 22 may be different.

[0372] In this embodiment, the main pad layer 21 and the first sleeve 22 have relatively high hardness, and the creep of the main pad layer 21 and the first sleeve 22 under long-term load is small, which is beneficial to suppressing the torque attenuation of the threaded connection structure that locks the housing 1.

[0373] In some embodiments, please refer to Figure 17 , Figure 18 , Figure 24 , Figure 25 , Figure 26 and Figure 28 The battery device also includes a pre-installed connector. The mounting box 100 also includes a cover 3 that covers the box body 1. The box body 1 and the cover 3 are arranged in a first direction. The box body 1 also includes a base, which is connected to the support body 11 along the first direction towards the cover 3. At least part of the surface of the base along the first direction towards the cover 3 is exposed above the support body 11. The base is made of metal. The pre-installed connector is installed on the side of the base along the first direction towards the cover 3.

[0374] For example, the number of battery cells in the battery cell assembly is at least two.

[0375] For example, at least two battery cells in a battery cell assembly can be connected in series, in parallel, or in a hybrid configuration, where a hybrid configuration means that at least two battery cells are connected in both series and parallel configurations.

[0376] The mounting box 100 is a container mainly used to house battery cell modules. The battery cell modules are located inside the mounting box 100, which serves to protect the battery cell modules.

[0377] Box 1 is the main structure that carries the battery cells.

[0378] The cover 3 is a structure that covers the box body 1. The box body 1 and the cover 3 are manufactured independently and then assembled together. The cover 3 covers the box body 1, and the battery cell assembly is located within the space enclosed by the box body 1 and the cover 3. The box body 1 and the cover 3 are manufactured independently and then assembled together, which facilitates the installation of the battery cell assembly within the space enclosed by the box body 1 and the cover 3.

[0379] The covering layer 12 covers the outer surface of the support 11, and the support 11 fills the covering layer 12 to a certain extent, providing support for the covering layer 12.

[0380] The pre-set support 6 is located on the side of the receiving cavity 13 away from the cover 3 to support the battery cell assembly. The battery cell assembly is the main load-bearing component in the battery device. The pre-set support 6 located on the side of the receiving cavity 13 away from the cover 3 is used to support the battery cell assembly. The pre-set support 6 has good load-bearing capacity.

[0381] Reinforced composite materials consist of a matrix phase and a reinforcing phase. The matrix phase acts as a bonder, protects the reinforcing phase, and transfers stress caused by external loads to the reinforcing phase. The reinforcing phase is mainly used for load-bearing.

[0382] For example, please refer to Figure 19 , Figure 20 , Figure 24 as well as Figure 26 The first direction is the direction shown by arrow R1 in the figure.

[0383] For example, the matrix phase can be a metal matrix, a resin matrix, or a ceramic matrix.

[0384] For example, the resin matrix can be a thermosetting resin such as epoxy resin or polyurethane.

[0385] For example, the resin matrix can be a thermoplastic resin such as nylon or polypropylene.

[0386] For example, the reinforcing phase can have various shapes, such as fibrous, granular, or flake-like.

[0387] For example, the reinforcing phase may be carbon fiber, glass fiber, aramid fiber or basalt fiber.

[0388] For example, the reinforced composite material can be a continuous fiber reinforced composite material.

[0389] For example, the lid 3 is made of reinforced composite material.

[0390] For example, please refer to Figure 21 , Figure 25 as well as Figure 28 The base is exposed on the surface of the support 11 and in contact with the covering layer 12 along the first direction toward the box cover 3.

[0391] For example, the base is exposed on the surface of the support 11 and the covering layer 12 along the first direction toward the box cover 3.

[0392] For example, the assembly structure is installed on the side of the housing 1 facing the cover 3 along the first direction. The assembly structure can be the cover 3 or other structures installed on the housing 1.

[0393] For example, the preset connector can be a bolt or a screw.

[0394] For example, the box body 1 and the box cover 3 are arranged in the vertical direction, and the first direction is arranged in the vertical direction.

[0395] For example, the upper surface of the mounting plate 1141 is at least partially exposed to the support 11, and / or the upper surface of the second sleeve 1142 is at least partially exposed to the support 11.

[0396] In this embodiment, since the base and the support 11 are connected along the first direction toward the side of the box cover 3, and the surface of the base along the first direction toward the side of the box cover 3 is at least partially exposed on the support 11, the metal base can provide a foundation for the installation and locking of the box 1 toward the side of the box cover 3. The preset connector can be installed on the base, so that the side of the box 1 toward the side of the box cover 3 can be well assembled. The assembly structure located on the side of the box 1 toward the side of the box cover 3 along the arrangement direction of the box 1 and the box cover 3 can be well assembled onto the box 1 through the preset connector.

[0397] In some embodiments, please refer to Figure 22 , Figure 23 , Figure 29 and Figure 30The base includes a mounting plate 1141 and a second sleeve 1142. The mounting plate 1141 has a mounting hole 11411. The second sleeve 1142 is mounted on the mounting plate 1141, and the second sleeve 1142 passes through the mounting hole 11411. The second sleeve 1142 protrudes from the mounting plate 1141 on one side away from the cover 3 along the axial direction of the mounting hole 11411. The second sleeve 1142 has an internal thread, and a pre-set connector is threadedly connected to the internal thread of the second sleeve 1142. The second sleeve 1142 and / or the mounting plate 1141 are connected to the support body 11. At least part of the surface of the mounting plate 1141 facing the cover 3 in a first direction and / or the surface of the second sleeve 1142 facing the cover 3 in the first direction are exposed in the support body 11.

[0398] The mounting plate 1141 and the second sleeve 1142 are both made of metal.

[0399] For example, the mounting plate 1141 may be made of steel or aluminum.

[0400] For example, mounting plate 1141 can be a flat plate.

[0401] For example, the number of second sleeves 1142 is one or at least two.

[0402] For example, at least two second sleeves 1142 are arranged sequentially along the extension direction of the mounting plate 1141.

[0403] For example, the second sleeve 1142 is welded to the mounting plate 1141.

[0404] For example, the second sleeve 1142 is interference-fitted with the mounting plate 1141.

[0405] For example, the second sleeve 1142 can be made of steel or aluminum.

[0406] Mounting plate 1141 has mounting holes 11411 that penetrate the mounting plate 1141 along its thickness direction.

[0407] In this embodiment, the pre-connector and the second sleeve 1142 are threaded together, making installation between them easier. The second sleeve 1142 protrudes from the side of the mounting plate 1141 opposite to the cover 3 along the axial direction of the mounting hole 11411. This design allows for a sufficient length of thread along the axial direction of the mounting hole 11411, facilitating a more secure installation between the pre-connector and the second sleeve 1142. Furthermore, it reduces the size of the mounting plate 1141 along the axial direction of the mounting hole 11411, resulting in a smaller thickness and reduced weight. The structure of the second sleeve 1142 and the mounting plate 1141 effectively achieves both a secure connection and reduced weight for the mounting plate 1141.

[0408] It is understood that the specific structure of the base is not limited. Exemplarily, both ends of the mounting plate 1141 can be flush with the second sleeve 1142. Exemplarily, the preset connector can be snapped into the second sleeve 1142.

[0409] In some embodiments, please refer to Figure 22 , Figure 23 , Figure 29 and Figure 30 The second sleeve 1142 includes a cylinder body 11421 and a threaded sleeve 11422. The cylinder body 11421 is connected to the mounting plate 1141 and passes through the mounting hole 11411. The threaded sleeve 11422 is threadedly connected to the cylinder body 11421, and the internal thread for threaded connection with the preset connecting member is formed on the threaded sleeve 11422.

[0410] For example, the cylinder 11421 is cylindrical in shape.

[0411] The threaded insert 11422 is an internal thread fastener. The threaded insert 11422 has both internal and external threads. The threaded insert 11422 is threadedly connected to the cylinder 11421 through the external thread. The pre-set connector is connected to the internal thread of the threaded insert 11422.

[0412] For example, the threaded sleeve 11422 is made of steel, while the cylindrical body 11421 can be made of aluminum or steel.

[0413] For example, there is an interference fit between the cylinder 11421 and the mounting plate 1141.

[0414] In this embodiment, by setting the threaded sleeve 11422, the internal thread of the cylinder 11421 can be protected to a certain extent. When the thread of the threaded sleeve 11422 is worn due to repeated disassembly and reassembly between the preset connector and the threaded sleeve 11422, the threaded sleeve 11422 can be unscrewed from the cylinder 11421 and replaced with a new threaded sleeve 11422. The maintenance is convenient and does not require the replacement of the entire mounting base, which helps to reduce maintenance costs.

[0415] It is understood that the specific structure of the second sleeve 1142 is not limited. For example, the second sleeve 1142 may not be provided with a threaded sleeve 11422, and a pre-set connector may be threadedly connected to the cylinder body 11421.

[0416] In some embodiments, the second sleeve 1142 is a rivet nut.

[0417] The second sleeve 1142 is a rivet nut, and the second sleeve 1142 is riveted to the mounting plate 1141.

[0418] For example, the second sleeve 1142 can be a rivet nut.

[0419] For example, the second sleeve 1142 can be a press-fit nut.

[0420] In this embodiment, the second sleeve 1142 is a rivet nut, and the connection between the second sleeve 1142 and the mounting plate 1141 is riveting, which makes the connection between the second sleeve 1142 and the mounting plate 1141 relatively firm. The rivet nut, as the second sleeve 1142, can be easily installed on thin plates.

[0421] It is understood that the connection method between the cylinder 11421 and the mounting plate 1141 is not limited. Exemplarily, the cylinder 11421 and the mounting plate 1141 can be welded. Exemplarily, the cylinder 11421 and the mounting plate 1141 can be integrally formed.

[0422] In some embodiments, please refer to Figure 23 and Figure 30 The thickness of mounting plate 1141 is 1mm~5mm.

[0423] For example, please refer to Figure 23 and Figure 30 The thickness of mounting plate 1141 is D14, where 1mm ≤ D14 ≤ 5mm.

[0424] For example, the thickness of the mounting plate 1141 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm.

[0425] In this embodiment, the thickness of the mounting plate 1141 is 1mm to 5mm, which ensures that the mounting plate 1141 has a certain thickness to meet the basic strength requirements, and the thickness of the mounting plate 1141 is not too thick, which helps to reduce costs.

[0426] In some embodiments, please refer to Figure 23 and Figure 30 The thickness of mounting plate 1141 is 2mm~3mm.

[0427] For example, please refer to Figure 23 and Figure 30 The thickness of mounting plate 1141 is D14, where 2mm ≤ D14 ≤ 3mm.

[0428] For example, the thickness of the mounting plate 1141 can be 2mm, 2.1mm, 2.2mm, 2.4mm, 2.5mm, 2.7mm, 2.9mm or 3mm.

[0429] In this embodiment of the application, the thickness of the mounting plate 1141 is 2mm to 3mm, which ensures that the mounting plate 1141 has a certain thickness to meet the basic strength requirements, and the thickness of the mounting plate 1141 is not too thick, which helps to reduce costs.

[0430] In some embodiments, please refer to Figures 18-25 At least one of the bases is a first base 115, and the pre-set connector connected to the first base 115 is a first connector 41. The support body 11 has a side beam 113 for supporting the box cover 3. The first base 115 is connected to the side beam 113 along a first direction toward the side of the box cover 3. The first connector 41 passes through the box cover 3 so that the box cover 3 is installed on the box body 1.

[0431] One of the bases is the first base 115, and the pre-set connector connected to the first base 115 is the first connector 41. The assembly structure installed on the side of the box 1 facing the box cover 3 along the first direction through the first base 115 and the first connector 41 is the box cover 3.

[0432] For example, please refer to Figure 24 The first connector 41 is inserted through the box cover 3 to connect with the first base 115.

[0433] For example, please refer to Figure 21 and Figure 25 The surface of the first base 115 facing the box cover 3 along the first direction is in contact with the covering layer 12.

[0434] For example, the surface of the first base 115 facing the lid 3 along the first direction is exposed in the covering layer 12.

[0435] For example, the mounting plate 1141 of the first base 115 and / or the second sleeve 1142 are connected to the side beam 113 of the support body 11.

[0436] For example, the surface of the mounting plate 1141 of the first base 115 facing the box cover 3 in the first direction is in contact with the covering layer 12.

[0437] For example, the surface of the second sleeve 1142 of the first base 115 facing the box cover 3 along the first direction is in contact with the covering layer 12.

[0438] For example, the surface of the mounting plate 1141 of the first base 115 facing the box cover 3 along the first direction is in contact with the covering layer 12, and the surface of the second sleeve 1142 of the first base 115 facing the box cover 3 along the first direction is in contact with the covering layer 12.

[0439] For example, the surface of the mounting plate 1141 of the first base 115 facing the box cover 3 in the first direction is exposed in the covering layer 12.

[0440] For example, the surface of the second sleeve 1142 of the first base 115 facing the box cover 3 along the first direction is exposed in the covering layer 12.

[0441] For example, the surface of the mounting plate 1141 of the first base 115 facing the box cover 3 along the first direction is exposed in the covering layer 12, and the surface of the second sleeve 1142 of the first base 115 facing the box cover 3 along the first direction is exposed in the covering layer 12.

[0442] For example, the battery assembly includes a sealing ring disposed between the cover 3 and the housing 1. A first base 115 provides support for mounting and locking, enabling the sealing ring to effectively seal between the cover 3 and the housing 1.

[0443] For example, the lid 3 and the body 1 can be in direct contact for sealing.

[0444] For example, the lid 3 can be made of reinforced composite material.

[0445] In this embodiment, the first base 115 made of metal can provide better support for the installation of the cover 3. When the first connector 41 passing through the cover 3 is connected to the first base 115 so that the cover 3 is installed on the box body 1, the first base 115 made of metal can reduce deformation, provide better support for the installation of the cover 3, and improve the sealing between the cover 3 and the box body 1.

[0446] In some embodiments, please refer to Figure 18 , Figure 19 as well as Figure 22The first base 115 is annular in shape and surrounds the housing 1 around the circumference of the receiving cavity 13.

[0447] For example, the mounting plate 1141 of the first base 115 is annular in shape, and at least two second sleeves 1142 of the first base 115 are arranged circumferentially at intervals along the receiving cavity 13.

[0448] In this embodiment, the annular metal base 115 surrounds the box 1 around the circumference of the receiving cavity 13, so that the box 1 can be well supported around its perimeter, which is beneficial to improving the sealing between the box 1 and the lid 3.

[0449] It is understood that the specific structure of the first base 115 is not limited. For example, the shape of the first base 115 may be elongated, and the number of elongated first bases 115 may be at least two, with at least two elongated first bases 115 arranged at circumferential intervals along the receiving cavity 13.

[0450] In some embodiments, please refer to Figure 18 , Figure 19 as well as Figure 22 The first base 115 is in the shape of a closed ring.

[0451] The first base 115 is in the shape of a closed ring, with the ring-shaped first base 115 connected end to end.

[0452] For example, the mounting plate 1141 of the first base 115 is in the shape of a closed ring, and the annular mounting plate 1141 of the first base 115 is connected end to end.

[0453] For example, the closed annular mounting plate 1141 of the first base 115 can be welded to both ends of the circumferential direction of the receiving cavity 13.

[0454] For example, the closed annular mounting plate 1141 of the first base 115 is an integrally formed ring.

[0455] In this embodiment, the first base 115 is in the shape of a closed ring, which is conducive to the more uniform load bearing of the first base 115 as a whole, providing a full circle of sealing support for the box 1, making the box 1 and the box cover 3 press more tightly, which is conducive to improving the sealing performance between the box 1 and the box cover 3.

[0456] It is understood that the specific structure of the annular first base 115 is not limited. Exemplarily, the shape of the annular first base 115 can be an open ring. Exemplarily, the two ends of the open-ring shaped first base 115 along the circumference of the receiving cavity 13 can be spaced apart. Exemplarily, the two ends of the open-ring shaped first base 115 along the circumference of the receiving cavity 13 can abut against each other, but the two ends of the open-ring shaped first base 115 along the circumference of the receiving cavity 13 are not connected together, and the end faces of the two ends of the open-ring shaped first base 115 along the circumference of the receiving cavity 13 can move relative to each other through deformation. Exemplarily, the mounting plate 1141 of the open-ring shaped first base 115 can be spaced apart along the two ends of the circumference of the receiving cavity 13.

[0457] In some embodiments, please refer to Figure 19 and Figure 26 ,as well as Figures 28-30 At least one of the bases is a second base 116, and the pre-set connector connected to the second base 116 is a second connector 42. The support body 11 has an expansion beam 111. The second base 116 and the expansion beam 111 are connected to the side of the box cover 3 along the first direction. Expansion beams 111 are provided on both sides of the battery cell assembly to withstand the expansion force of the battery cell. The battery device also includes a pull plate 5 spanning the expansion beams 111 on both sides. The pull plate 5 is provided with a second connector 42 at both ends along the arrangement direction of the expansion beams 111 on both sides. The second connector 42 at each end passes through the corresponding pull plate 5 so that the pull plate 5 is installed on the box body 1 at the corresponding position of the expansion beam 111.

[0458] One of the bases is the second base 116, and the pre-connected component connected to the second base 116 is the second connector 42. The assembly structure installed on the side of the box 1 facing the box cover 3 in the first direction through the second base 116 and the second connector 42 is the pull plate 5.

[0459] Expansion beams 111 are provided on both sides of the battery cell assembly, and the battery cell assembly is located between the two expansion beams 111 along the arrangement direction of the two expansion beams 111.

[0460] For example, the battery cell assembly is located along the first direction on the side of the pull plate 5 away from the box cover 3.

[0461] For example, the second connector 42 passes through the corresponding pull plate 5 to connect with the second base 116.

[0462] For example, please refer to Figure 26 and Figure 28 The surface of the second base 116 facing the box cover 3 along the first direction is in contact with the covering layer 12.

[0463] For example, the surface of the second base 116 facing the lid 3 along the first direction is exposed in the covering layer 12.

[0464] For example, the mounting plate 1141 and / or the second sleeve 1142 of the second base 116 are connected to the expansion beam 111 of the support body 11.

[0465] For example, the surface of the mounting plate 1141 of the second base 116 facing the box cover 3 in the first direction is in contact with the covering layer 12.

[0466] For example, the surface of the second sleeve 1142 of the second base 116 facing the box cover 3 in the first direction is in contact with the covering layer 12.

[0467] For example, the surface of the mounting plate 1141 of the second base 116 facing the box cover 3 in the first direction is in contact with the covering layer 12, and the surface of the second sleeve 1142 of the second base 116 facing the box cover 3 in the first direction is in contact with the covering layer 12.

[0468] For example, the surface of the mounting plate 1141 of the second base 116 facing the box cover 3 in the first direction is exposed in the covering layer 12.

[0469] For example, the surface of the second sleeve 1142 of the second base 116 facing the box cover 3 in the first direction is exposed in the covering layer 12.

[0470] For example, the surface of the mounting plate 1141 of the second base 116 facing the box cover 3 in the first direction is exposed in the covering layer 12, and the surface of the second sleeve 1142 of the second base 116 facing the box cover 3 in the first direction is exposed in the covering layer 12.

[0471] For example, the material of the pull plate 5 can be metal.

[0472] For example, the material of the pull plate 5 can be aluminum or steel.

[0473] For example, please refer to Figure 29 and Figure 30 The second base 116 is elongated, and its length is arranged along the length of the expansion beam 111, intersecting the arrangement direction of the two expansion beams 111. The elongated shape of the second base 116 helps to improve the stiffness of the housing 1 near the expansion beam 111 and suppresses the deformation of the housing 1 caused by the expansion force of the battery cell assembly near the expansion beam 111.

[0474] For example, please refer to Figure 29 and Figure 30The mounting plate 1141 of the second base 116 is elongated, and its length is arranged along the length of the expansion beam 111. The length of the mounting plate 1141 intersects with the arrangement direction of the expansion beams 111 on both sides. At least two second sleeves 1142 of the second base 116 are arranged at intervals along the length of the mounting plate 1141.

[0475] For example, please refer to Figure 19 , Figure 26 , Figure 29 and Figure 30 The length direction of the second base 116 is as shown by arrow R3 in the figure.

[0476] For example, please refer to Figure 19 , Figure 26 , Figure 29 and Figure 30 The length direction of the expansion beam 111 is as shown by arrow R3 in the figure.

[0477] For example, please refer to Figure 19 , Figure 26 , Figure 29 and Figure 30 The length direction of the mounting plate 1141 of the second base 116 is as shown by arrow R3 in the figure.

[0478] For example, the covering layer 12 has a support portion 125 located between the expansion beams 111 and the battery cell assembly along the arrangement direction of the two expansion beams 111. The expansion beams 111 of the support 11 apply compressive force to the battery cell assembly through the support portion 125 of the covering layer 12 to suppress the expansion of the battery cells in the battery cell assembly.

[0479] In this embodiment, the second metal base 116 provides support for the mounting and locking of the pull plate 5 at the expansion beam 111. The second connector 42 passes through the pull plate 5 and connects to the second base 116, securing the pull plate 5 firmly to the vicinity of the expansion beam 111. With both ends of the pull plate 5 secured to the expansion beam 111 via the corresponding second base 116 and second connector 42, deformation of the two expansion beams 111 can be suppressed, allowing them to better resist the expansion force of the battery cell assembly and inhibit the expansion of the battery cells.

[0480] In some embodiments, please refer to Figure 21 and Figure 28 The surface of the base facing the box cover 3 along the first direction is bonded to the covering layer 12.

[0481] For example, the surface of the first base 115 facing the box cover 3 along the first direction is attached to the covering layer 12.

[0482] For example, the surface of the second base 116 facing the box cover 3 along the first direction is attached to the covering layer 12.

[0483] For example, the upper surface of the first base 115 is attached to the covering layer 12.

[0484] For example, the upper surface of the second base 116 is attached to the covering layer 12.

[0485] In this embodiment, since the surface of the base facing the lid 3 along the first direction is in contact with the covering layer 12, the pre-set connector passes through the pull plate 5, and the force that presses the pull plate 5 against the covering layer 12 is transmitted through the covering layer 12 to the base that is in contact with the covering layer 12. The base provides support for the pull plate 5 to be installed and locked. The surface of the base facing the lid 3 along the first direction is in contact with the covering layer 12, and the covering layer 12 can cover the surface of the base facing the lid 3 along the first direction, reducing the exposure of the base.

[0486] In some embodiments, please refer to Figure 21 and Figure 28 The covering layer 12 includes a first covering layer 123 and a second covering layer 124. The first covering layer 123 surrounds a receiving cavity 13, and the material of the first covering layer 123 is a reinforced composite material, with glass fiber as the reinforcing phase. The support 11 is located within the space surrounded by the first covering layer 123 and the second covering layer 124, and the material of the second covering layer 124 is a reinforced composite material, with carbon fiber as the reinforcing phase.

[0487] For example, the first cover 123 and the second cover 124 are connected.

[0488] For example, please refer to Figure 17 , Figure 19 and Figure 28 The supporting part 125 is formed on the first covering layer 123.

[0489] In this embodiment, the first cladding layer 123 surrounds a receiving cavity 13. The battery cell assembly located within the receiving cavity 13 is close to the first cladding layer 123 and may even be in contact with it. The reinforcing phase of the first cladding layer 123 is glass fiber, which gives it good insulation properties, thus facilitating insulation of the battery cells within the receiving cavity 13. The reinforcing phase of the second cladding layer 124 is carbon fiber, giving it high strength and reducing weight.

[0490] It is understood that the specific structure of the covering layer 12 is not limited. For example, the entire covering layer 12 is made of the same reinforced composite material.

[0491] In some embodiments, the battery device further includes a preset support 6 connected to the support body 11. The preset support 6 is made of metal and is at least partially laid on the side of the receiving cavity 13 opposite to the cover 3 to support the battery cell assembly.

[0492] The pre-set support 6 is at least partially laid on the side of the receiving cavity 13 away from the box cover 3. The pre-set support 6 is used to improve the load-bearing capacity of the box 1 for the battery cells.

[0493] For example, the preset support 6 is located at least partially below the battery cell assembly.

[0494] For example, the preset support 6 is located on the side of the covering layer 12 facing the support body 11.

[0495] For example, the material of the preset support 6 is aluminum or steel.

[0496] In this embodiment, the preset support 6 is at least partially laid on the side of the receiving cavity 13 away from the box cover 3 to support the battery cell. The preset support 6, made of metal and connected to the support body 11, helps to improve the load-bearing capacity of the box body 1, so that the box body 1 can better support the battery cell assembly.

[0497] It is understood that the specific structure of the battery device is not limited. For example, the battery device may not have the preset support 6.

[0498] In some embodiments, please refer to Figure 19 , Figure 26 as well as Figure 27 The preset support 6 is plate-shaped and is surrounded by at least two grooves 61. The at least two grooves 61 are arranged in the third direction. The preset support 6 has grooves 61 on both sides along the first direction, and the grooves 61 on both sides are arranged alternately along the third direction.

[0499] For example, the cross-sectional shape of the groove 61 can be square.

[0500] For example, the cross-sectional shape of the groove 61 can be V-shaped.

[0501] For example, a pre-defined support in the shape of a plate is bent into shape.

[0502] For example, the preset support 6 can be formed by splicing together multiple plates.

[0503] For example, please refer to Figure 19 , Figure 26 as well as Figure 27 The third direction is the direction shown by arrow R2 in the figure.

[0504] In this embodiment, the grooves 61 on both sides are arranged alternately along the arrangement direction of at least two grooves 61, so that the plate-shaped preset support 6 has alternating concave and convex shapes, which is beneficial to improving the rigidity of the preset support 6 and giving the preset support 6 a better load-bearing capacity.

[0505] It is understood that the specific structure of the preset support 6 is not limited. For example, the preset support 6 can be a flat plate.

[0506] In some embodiments, the support 11 may be made of foam material.

[0507] For example, the foaming material can be a thermosetting foaming material such as polyurethane or epoxy.

[0508] For example, the foaming material can be a thermoplastic foaming material such as polyethylene terephthalate, polyphenylene ether, polypropylene, or nylon.

[0509] In this embodiment, the foam material has a low density. The material of the support 11 is foam material, which can reduce the weight and provide support for the box 1 to a certain extent.

[0510] In some embodiments, the support 11 may be made of reinforced composite material.

[0511] For the battery device in this application embodiment, please refer to [link / reference]. Figures 17-30The battery device includes a battery cell assembly, a mounting box 100, and pre-installed connectors. The battery cell assembly includes battery cells. The mounting box 100 includes a box body 1 and a cover 3 covering the box body 1. The box body 1 and the cover 3 are arranged in a first direction. The box body 1 includes a support 11, a base, and a covering layer 12 covering the outer surface of the support 11. The covering layer 12 is made of reinforced composite material and forms a receiving cavity 13. The battery cells are located within the receiving cavity 13. The base is connected to the support 11 along the first direction towards the cover 3. At least part of the surface of the base along the first direction towards the cover 3 is exposed above the support 11. The base is made of metal. Pre-installed connectors are installed on the side of the base along the first direction towards the cover 3. At least one of the bases is a first base 115, and a pre-defined connector connected to the first base 115 is a first connector 41. The support body 11 has a side beam 113 for supporting the box cover 3. The first base 115 is connected to the side beam 113 along a first direction towards the box cover 3. The first connector 41 passes through the box cover 3 so that the box cover 3 is installed on the box body 1. The base includes a mounting plate 1141 and a second sleeve 1142. The mounting plate 1141 has a mounting hole 11411. The second sleeve 1142 is mounted on the mounting plate 1141, passing through the mounting hole 11411. The second sleeve 1142 protrudes from the mounting plate 1141 along the axial direction of the mounting hole 11411, away from the cover 3. The second sleeve 1142 has internal threads, and a pre-set connector is threadedly connected to the internal threads of the second sleeve 1142. The second sleeve 1142 and / or the mounting plate 1141 are connected to the support body 11. At least partially, the surface of the mounting plate 1141 facing the cover 3 along the first direction and / or the surface of the second sleeve 1142 facing the cover 3 along the first direction are exposed on the support body 11. The surface of the base facing the cover 3 along the first direction is in contact with the covering layer 12. The support body 11 is made of foam material. The mounting plate 1141 is a steel strip or steel plate. The first base 115 is in the shape of a closed ring, and the mounting plate 1141 of the first base 115 is in the shape of a closed ring. The closed ring mounting plate 1141 of the first base 115 is an integrally formed ring, and the box body 1 has good flatness on the side of the first base 115 facing the box cover 3 along the first direction.

[0512] The second sleeve 1142, by way of example, includes a cylindrical body 11421 and a threaded sleeve 11422. The cylindrical body 11421 is connected to the mounting plate 1141 and passes through the mounting hole 11411. The threaded sleeve 11422 is threadedly connected to the cylindrical body 11421, and the internal thread for threaded connection with the preset connecting member is formed on the threaded sleeve 11422. A hole for installing the threaded sleeve 11422 is machined on the cylindrical body 11421, and a corresponding thread for installing the threaded sleeve 11422 is machined on the inner surface of the hole. The threaded sleeve 11422 is then screwed into the machined cylindrical body 11421. The cylindrical body 11421 can be made of aluminum or steel.

[0513] For example, the second sleeve 1142 can be a rivet nut.

[0514] For the battery device in this application embodiment, please refer to [link / reference]. Figures 31-33 The mounting box 100 also includes a cover 3 covering the box body 1. The box body 1 also includes a preset support 6. At least one hanger is a hanging device 15. The preset support 6 is located on the side of the covering layer 12 facing the support body 11. The preset support 6 is connected to the support body 11. The preset support 6 is laid on the side of the receiving cavity 13 away from the cover 3 to support the battery cell assembly. The hanging device 15 has a mounting hole 16 for hanging the box body 1. The hanging device 15 includes a mounting member. The mounting member is connected to the preset support 6 so that the load borne by the mounting hole 16 is transmitted to the preset support 6 through the mounting member.

[0515] For example, the number of battery cells in a battery cell assembly can be one or at least two.

[0516] For example, at least two battery cells in a battery cell assembly can be connected in series, in parallel, or in a hybrid configuration, where a hybrid configuration means that at least two battery cells are connected in both series and parallel configurations.

[0517] The mounting box 100 is a container mainly used to house battery cell modules. The battery cell modules are located inside the mounting box 100, which serves to protect the battery cell modules.

[0518] Box 1 is the main structure that carries the battery cells.

[0519] The cover 3 is a structure that covers the box body 1. The box body 1 and the cover 3 are manufactured independently and then assembled together. The cover 3 covers the box body 1, and the battery cell assembly is located within the space enclosed by the box body 1 and the cover 3. The box body 1 and the cover 3 are manufactured independently and then assembled together, which facilitates the installation of the battery cell assembly within the space enclosed by the box body 1 and the cover 3.

[0520] The covering layer 12 covers the outer surface of the support 11, and the support 11 fills the covering layer 12 to a certain extent, providing support for the covering layer 12.

[0521] The pre-set support 6 is located on the side of the receiving cavity 13 away from the cover 3 to support the battery cell assembly. The battery cell assembly is the main load-bearing component in the battery device. The pre-set support 6 located on the side of the receiving cavity 13 away from the cover 3 is used to support the battery cell assembly. The pre-set support 6 has good load-bearing capacity.

[0522] Reinforced composite materials consist of a matrix phase and a reinforcing phase. The matrix phase acts as a bonder, protects the reinforcing phase, and transfers stress caused by external loads to the reinforcing phase. The reinforcing phase is mainly used for load-bearing.

[0523] For example, the matrix phase can be a metal matrix, a resin matrix, or a ceramic matrix.

[0524] For example, the resin matrix can be a thermosetting resin such as epoxy resin or polyurethane.

[0525] For example, the resin matrix can be a thermoplastic resin such as nylon or polypropylene.

[0526] For example, the reinforcing phase can have various shapes, such as fibrous, granular, or flake-like.

[0527] For example, the reinforcing phase may be carbon fiber, glass fiber, aramid fiber or basalt fiber.

[0528] For example, the reinforced composite material can be a continuous fiber reinforced composite material.

[0529] For example, the lid 3 is made of reinforced composite material.

[0530] The mounting hole 16 on the hanging device 15 is used to hang the housing 1. For example, the electrical device is a car or an aircraft. A sling is connected to the bottom of the car or aircraft. The sling passes through the mounting hole 16 to hang the battery device as a whole. The sling can be fixed to the housing 1 at the mounting hole 16 by a nut.

[0531] For example, the support 11 covers the outside of the preset support 6, and the preset support 6 is located inside the support 11.

[0532] For example, the axial direction of the mounting hole 16 is arranged along the arrangement direction of the housing 1 and the cover 3.

[0533] In this embodiment, a pre-set support 6 is laid on the side of the receiving cavity 13 away from the box cover 3 to support the battery cell assembly. The pre-set support 6 has a good load-bearing capacity. The mounting part of the hanging device 15 is connected to the pre-set support 6 so that the load on the mounting hole 16 of the hanging device 15 can be well transferred to the pre-set support 6 through the mounting part. Thus, the load at the mounting hole 16 is shared by the pre-set support 6, which is beneficial to improve the load-bearing capacity of the box 1 and enables the battery device to be well hung on the electrical device.

[0534] In some embodiments, please refer to Figures 31-34 , Figure 36 , Figure 38 as well as Figure 39 The materials of the hanging device 15 and the preset support 6 are both metal, and / or the material of the support body 11 is foam material.

[0535] For example, the materials of the hanging device 15 and the preset support 6 are both metal.

[0536] For example, the support 11 is made of foam material.

[0537] For example, the hanging device 15 and the preset support 6 are both made of metal, and the support body 11 is made of foam material.

[0538] For example, the material of the preset support 6 can be steel or aluminum.

[0539] For example, the hanging device 15 can be made of steel or aluminum.

[0540] For example, the mounting component is made of metal.

[0541] For example, the mounting component is made of steel or aluminum.

[0542] For example, the material of the support 11 can be a thermosetting foam material such as polyurethane or epoxy.

[0543] For example, the material of the support 11 can be a thermoplastic foam material such as polyethylene terephthalate, polyphenylene ether, polypropylene or nylon.

[0544] For example, the mounting component is welded to the preset support 6.

[0545] In this embodiment, the metal-based pre-support 6 enhances its load-bearing capacity. The metal hanging device 15 provides good load-bearing capacity, facilitating the transfer of load at the mounting hole 16 to the pre-support 6 via the mounting component. The support body 11 is made of foamed material, which has a low density, allowing it to fill the space inside the covering layer 12 with minimal weight, thus reducing the weight of the box 1.

[0546] It is understood that the material of the support 11 is not limited. For example, the material of the support 11 can be a reinforced composite material.

[0547] In some embodiments, please refer to Figures 31-34 , Figure 36 , Figure 38 as well as Figure 39 The hanging device 15 is made of steel or aluminum, and / or the preset support 6 is made of steel or aluminum.

[0548] For example, the material of the hanging device 15 and the material of the preset support 6 are both aluminum.

[0549] For example, the material of the hanging device 15 and the material of the preset support 6 are both steel.

[0550] For example, the hanging device 15 is made of steel, and the preset support 6 is made of aluminum.

[0551] For example, the hanging device 15 is made of aluminum, and the preset support 6 is made of steel.

[0552] For example, the mounting component is made of steel or aluminum.

[0553] In some embodiments, please refer to Figures 31-36 The arrangement direction of the box body 1 and the box cover 3 is the first direction. At least one mounting component is the first mounting component 17. The first mounting component 17 and the receiving cavity 13 are arranged along the second direction. The second direction and the first direction are arranged intersectingly. The preset support 6 is connected to the first mounting component 17 on both sides of the second direction. The first mounting component 17 forms a mounting hole 16.

[0554] The first mounting member 17 has a mounting hole 16. The structure for suspending the battery device on the main body of the electrical device is installed in the mounting hole 16. The first mounting member 17 is connected to the structure for suspending the battery device, and the load at the mounting hole 16 directly acts on the first mounting member 17.

[0555] For example, the first mounting component 17 is block-shaped.

[0556] For example, the first mounting component 17 is cube-shaped.

[0557] For example, please refer to Figure 35 , Figure 37 and Figure 42 The first direction is the direction shown by arrow R1 in the figure.

[0558] For example, please refer to Figure 31 , Figure 32 , Figure 33 , Figure 35 and Figure 42 The second direction is the direction indicated by arrow R3 in the figure.

[0559] For example, the first direction is perpendicular to the second direction.

[0560] For example, the electrical device is a vehicle or an aircraft, and the second direction can be the width direction of the vehicle or the width direction of the aircraft.

[0561] For example, the first mounting component 17 is made of metal.

[0562] For example, the first mounting component 17 is welded to the preset support 6.

[0563] In this embodiment, the preset support 6 is connected to the first mounting member 17 on both sides of the second direction. The first mounting member 17 on both sides bears the hanging load at the corresponding mounting hole 16, so that the battery device is subjected to relatively uniform force on both sides of the second direction.

[0564] It is understood that the arrangement of the first mounting component 17 is not limited. For example, the first mounting component 17 is located on one side of the preset support 6 along the second direction, and no hanging structure is provided on the other side of the preset support 6 along the second direction.

[0565] In some embodiments, please refer to Figures 31-37 The support body 11 has an expansion beam 111. The battery cell assembly has expansion beams 111 on both sides along the third direction. The third direction is arranged to intersect with the first direction and the second direction respectively.

[0566] An expansion beam 111 is provided on both sides of the battery cell assembly along the third direction. During normal operation, the battery cells in the battery cell assembly expand and exert an expansion force on the expansion beam 111. The expansion beams 111 on both sides exert a corresponding reaction force to suppress the expansion of the battery cells in the battery cell assembly.

[0567] For example, please refer to Figure 31 , Figure 32 , Figure 33 and Figure 37 The third direction is the direction shown by arrow R2 in the figure.

[0568] For example, the third direction is arranged to intersect with the first direction.

[0569] For example, the third direction is perpendicular to the first direction.

[0570] For example, the third direction is arranged to intersect with the second direction.

[0571] For example, the third direction is perpendicular to the second direction.

[0572] In this embodiment, the arrangement direction of the two expansion beams 111 is a third direction, which is intersected with the first direction and the second direction respectively. This makes the arrangement direction of the two expansion beams 111 and the arrangement direction of the two first mounting parts 17 bearing the hanging load in two different directions. The hanging load at the two first mounting parts 17 has less interference with the force exerted by the expansion beams 111 on the battery cell assembly to resist the expansion of the battery cell.

[0573] It is understood that the arrangement of the expansion beams 111 on both sides and the arrangement of the first mounting members 17 on both sides are not limited. For example, the arrangement direction of the expansion beams 111 on both sides can be consistent with the arrangement direction of the first mounting members 17 on both sides, that is, the third direction is parallel to the second direction.

[0574] In some embodiments, please refer to Figure 36 The first mounting member 17 has locking surfaces 171 on opposite sides along the axial direction of the mounting hole 16. The projection area of ​​the locking surfaces 171 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16.

[0575] The projection area of ​​the binding surface 171 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16, and the projection areas of the binding surface 171 and the covering layer 12 do not overlap in region.

[0576] For example, the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 and the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16 can be spaced apart by a certain distance, so as to achieve that the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 and the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16 are staggered.

[0577] For example, the outer contour line of the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 can contact the outer contour line of the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16, but there is no overlapping area between the outer contour line of the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 and the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16, so as to achieve that the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 and the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16 are staggered.

[0578] The projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16. Here, the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16 specifically refers to the projection area of ​​the covering layer 12 on the side of the first mounting member 17 facing the corresponding locking surface 171 along the axial direction of the mounting hole 16. For example, please refer to... Figure 35 , Figure 36 and Figure 42For the locking surface 171 of the first mounting member 17 facing the box cover 3 along the axial direction of the mounting hole 16, the projection area of ​​the covering layer 12 on the part of the first mounting member 17 facing the locking surface 171 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the locking surface 171. That is, the projection area of ​​the covering layer 12 on the part of the first mounting member 17 facing the box cover 3 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16. The positional relationship between the projection area of ​​the covering layer 12 on the part of the first mounting member 17 facing away from the locking surface 171 along the axial direction of the mounting hole 16 and the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 is not restricted. For example, please see Figure 35 , Figure 36 and Figure 42 For the locking surface 171 of the first mounting member 17 on the side opposite to the cover 3 along the axial direction of the mounting hole 16, the projection area of ​​the covering layer 12 on the portion of the first mounting member 17 facing the locking surface 171 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the locking surface 171. That is, the projection area of ​​the covering layer 12 on the portion of the first mounting member 17 facing away from the cover 3 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16. The positional relationship between the projection area of ​​the covering layer 12 on the portion of the first mounting member 17 facing away from the locking surface 171 along the axial direction of the mounting hole 16 and the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 is not restricted.

[0579] For example, please refer to Figure 35 , Figure 36 and Figure 42 The projection area of ​​the upper locking surface 171 along the axial direction of the mounting hole 16 in the figure is offset from the projection area of ​​the portion of the covering layer 12 located on the upper side of the first mounting member 17 along the axial direction of the mounting hole 16. The positional relationship between the projection area of ​​the upper locking surface 171 along the axial direction of the mounting hole 16 in the figure and the projection area of ​​the portion of the covering layer 12 located on the lower side of the first mounting member 17 along the axial direction of the mounting hole 16 is not limited.

[0580] For example, please refer to Figure 35 , Figure 36 and Figure 42The projection area of ​​the locking surface 171 at the bottom of the figure along the axial direction of the mounting hole 16 is offset from the projection area of ​​the portion of the covering layer 12 located on the lower side of the first mounting member 17 along the axial direction of the mounting hole 16. The positional relationship between the projection area of ​​the locking surface 171 at the bottom of the figure along the axial direction of the mounting hole 16 and the projection area of ​​the portion of the covering layer 12 located on the upper side of the first mounting member 17 along the axial direction of the mounting hole 16 is not limited.

[0581] For example, the battery device is suspended to the electrical device by fasteners, and the fasteners exert a locking force on the battery device on the locking surface 171. The fasteners can apply a locking force to the battery device housing 1 without avoiding the covering layer 12.

[0582] For example, the fasteners for suspending the battery device can be bolts, which are inserted through the mounting holes 16 to tighten the battery device housing 1 onto the device body of the electrical device.

[0583] For example, the fasteners for suspending the battery device may include a rod connected to the lower part of the device body of the power device and a nut threadedly connected to the rod. The rod passes through the mounting hole 16. The housing 1 is fixed to the rod by the nut screwed on the rod, so that the battery device is suspended below the device body through the housing 1. The locking force applied by the nut on the rod to the housing 1 can act on the locking surface 171 to avoid the covering layer 12.

[0584] For example, the first mounting member 17 may be located on the side of the covering layer 12 facing the support 11.

[0585] For example, the first mounting member 17 may be located at least partially on the side of the covering layer 12 opposite to the support 11.

[0586] For example, the first mounting member 17 may be made of metal, and the locking surface 171 may be a metal surface.

[0587] For example, the first mounting component 17 may be made of steel or aluminum.

[0588] In this embodiment, since the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16, the locking surface 171 of the first mounting member 17 is exposed in the covering layer 12. This allows the force exerted by the fasteners used to hang the box 1 on the box 1 to act on the locking surface 171 to avoid the covering layer 12, reducing the possibility that the covering layer 12 will creep under the locking force of the fasteners, causing the torque of the fasteners locking the box 1 to decrease.

[0589] It is understood that the arrangement of the first mounting member 17 is not limited. Exemplarily, the surfaces of the first mounting member 17 on opposite sides along the axial direction of the mounting hole 16 are covered with a covering layer 12, and the locking surfaces 171 of the covering layer 12 are not exposed on opposite sides along the axial direction of the mounting hole 16.

[0590] In some embodiments, please refer to Figures 33-36 The first mounting member 17 has an annular groove 172 formed at one end of the mounting hole 16 facing the cover 3. The annular groove 172 surrounds the outer side of the locking surface 171 on the side of the first mounting member 17 facing the cover 3 along the axial direction of the mounting hole 16.

[0591] For example, the covering layer 12 is partially located within the annular groove 172.

[0592] In this embodiment, the projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16. The portion of the covering layer 12 located on the first mounting member 17 facing the cover 3 along the axial direction of the mounting hole 16 is outside the locking surface 171. The groove wall of the annular groove 172 can block the covering layer 12 to a certain extent, which can reduce the possibility of the covering layer 12 covering the locking surface 171 during the manufacturing process of the box body 1.

[0593] It is understood that the specific structure of the first mounting member 17 is not limited. For example, the first mounting member 17 may not have an annular groove 172. The surface of the first mounting member 17 facing the cover 3 along the axial direction of the mounting hole 16 is flush with the locking surface 171. The surface of the first mounting member 17 facing the cover 3 along the axial direction of the mounting hole 16 is a plane.

[0594] In some embodiments, please refer to Figure 36 The mounting hole 16 includes a first hole 161 and a second hole 162 that are interconnected. The second hole 162 is located on the side of the first hole 161 away from the cover 3 along the axial direction of the first hole 161. The projection area of ​​the first hole 161 along the axial direction of the first hole 161 is located in the projection area of ​​the second hole 162 along the axial direction of the first hole 161. The side of the second hole 162 away from the first hole 161 penetrates the covering layer 12. Both ends of the first hole 161 are provided with a locking surface 171. The opening at each end of the first hole 161 is located on the locking surface 171.

[0595] For example, the shape of the first hole 161 and the shape of the second hole 162 are both cylindrical.

[0596] In this embodiment, the projection area of ​​the first hole 161 along the axial direction of the first hole 161 is located within the projection area of ​​the second hole 162 along the axial direction of the first hole 161, making the second hole 162 larger. The structure for locking the locking surface 171 located at the end of the first hole 161 away from the box cover 3 can be accommodated in the second hole 162, reducing the degree to which the structure for locking the locking surface 171 located at the end of the first hole 161 away from the box cover 3 protrudes from the side of the first mounting member 17 away from the box cover 3.

[0597] It is understood that the specific structure of the mounting hole 16 is not limited. For example, the mounting hole 16 may not have a second hole 162, and the first hole 161 may have both ends of the covering layer 12 penetrating along the axial direction of the first hole 161.

[0598] In some embodiments, please refer to Figure 33 and Figure 34 The dimension of the first mounting member 17 along the second direction is larger than the dimension of the first mounting member 17 along the third direction. The third direction is arranged to intersect with the first direction and the second direction respectively. The first mounting member 17 forms a weight reduction cavity 173, which is located between the mounting holes 16 of the two sides of the first mounting member 17.

[0599] For example, the third direction is arranged to intersect with the first direction.

[0600] For example, the third direction is arranged to intersect with the second direction.

[0601] For example, the third direction is perpendicular to the first direction.

[0602] For example, the third direction is perpendicular to the second direction.

[0603] For example, please refer to Figure 33 and Figure 34 The dimension of the first mounting member 17 along the second direction is D10, and the dimension of the first mounting member 17 along the third direction is D11, where D10>D11.

[0604] In this embodiment, since the preset support 6 is connected to the first mounting members 17 on both sides along the second direction, the torque formed by the load borne by the first mounting members 17 at the mounting holes 16 causes the preset support 6 to have a certain bending tendency. The dimension of the first mounting member 17 along the second direction is larger than the dimension of the first mounting member 17 along the third direction, which is beneficial to strengthen the corresponding position of the preset support 6 along the second direction, improves the rigidity, and can suppress the degree of deformation of the preset support 6 under the action of the torque formed by the load at the mounting holes 16 of the first mounting members 17 on both sides. The first mounting member 17 forms a weight reduction cavity 173. The setting of the weight reduction cavity 173 makes the first mounting member 17 hollow in the weight reduction cavity 173, which is beneficial to reduce the weight of the battery device and improve the mass energy density. The weight-reducing cavity 173 is located between the mounting holes 16 of the first mounting members 17 on both sides. The weight-reducing cavity 173 and the mounting holes 16 are arranged in a larger space along the second direction of the first mounting members 17, which is conducive to saving space. Moreover, the mounting holes 16 are relatively close to the outside of the box 1 relative to the weight-reducing cavity 173, which facilitates the hanging installation of the box 1.

[0605] It is understood that the specific structure of the first mounting member 17 is not limited. Exemplarily, the dimension of the first mounting member 17 along the second direction may be less than or equal to the dimension of the first mounting member 17 along the third direction. Exemplarily, the first mounting member 17 may not have the weight-reducing cavity 173, and the first mounting member 17 may be a solid structure. Exemplarily, the weight-reducing cavity 173 may be located outside the mounting holes 16 on both sides of the first mounting member 17.

[0606] In some embodiments, please refer to Figure 35 and Figure 36 The support 11 is partially located inside the weight reduction cavity 173, and the density of the support 11 is less than the density of the first mounting member 17.

[0607] The density here refers to the density of the solid part of the component itself, without considering the volume ratio of the hollow space. For example, if the material of the first mounting component 17 is aluminum, the density of the first mounting component 17 is the density of aluminum, and the density of the first mounting component 17 does not take into account the volume ratio of the weight reduction cavity 173.

[0608] For example, the support 11 fills the weight reduction cavity 173.

[0609] In this embodiment, the less dense support 11 is partially located within the weight reduction cavity 173, which can both support the first mounting member 17 to a certain extent and help reduce weight.

[0610] It is understood that the specific structure of the battery device is not limited. For example, the weight reduction cavity 173 of the first mounting member 17 is empty and is not filled with the support body 11.

[0611] In some embodiments, please refer to Figures 31-33 , Figures 37-39 ,as well as Figure 41 The arrangement direction of the box body 1 and the box cover 3 is the first direction. At least one mounting member is the second mounting member 18. The second mounting member 18 and the receiving cavity 13 are arranged along a third direction. The third direction and the first direction are arranged intersecting. The preset support 6 is connected to the second mounting member 18 on at least one side along the third direction. The hanging device 15 also includes a hanging bracket 19. The hanging bracket 19 is installed on the side of the covering layer 12 away from the second mounting member 18. The projection area of ​​the hanging bracket 19 along the third direction and the projection area of ​​the second mounting member 18 along the third direction at least partially overlap. The hanging bracket 19 forms a mounting hole 16.

[0612] The hanging bracket 19 has a mounting hole 16. The load at the mounting hole 16 is transmitted to the second mounting member 18 through the hanging bracket 19, and then to the preset support 6 connected to the second mounting member 18 through the second mounting member 18.

[0613] For example, the hanging device 15 is made of metal, and the second mounting part 18 and the hanging bracket 19 are both made of metal.

[0614] For example, the second mounting component 18 and the hanging bracket 19 are both made of aluminum.

[0615] For example, the second mounting component 18 and the hanging bracket 19 are both made of steel.

[0616] For example, the second mounting component 18 is made of aluminum, and the hanging bracket 19 is made of steel.

[0617] For example, the second mounting component 18 is made of steel, and the hanging bracket 19 is made of aluminum.

[0618] In this embodiment, the hanging bracket 19 is installed on the side of the covering layer 12 opposite to the second mounting member 18, facilitating the mounting hole 16 on the hanging bracket 19 to be installed onto the corresponding hanging structure. The projection area of ​​the hanging bracket 19 along a third direction and the projection area of ​​the second mounting member 18 along a third direction at least partially overlap. The second mounting member 18 can better support the hanging bracket 19, which is beneficial for better transferring the load borne by the hanging bracket 19 at the mounting hole 16 to the preset support 6 through the second mounting member 18. The load borne by the hanging bracket 19 at the mounting hole 16 is shared by the preset support 6, improving the load-bearing capacity of the housing 1.

[0619] In some embodiments, please refer to Figures 31-33 , Figure 35 , Figures 37-39 ,as well as Figure 41At least one mounting component is a first mounting component 17. The first mounting component 17 and the receiving cavity 13 are arranged along a second direction. The second direction is arranged to intersect with the first direction and the third direction respectively. The preset support 6 is connected to the first mounting component 17 on both sides along the second direction. The first mounting component 17 has a mounting hole 16.

[0620] The first mounting member 17 with mounting holes 16 is mainly used for hanging installation of the housing 1 on opposite sides along the second direction.

[0621] The second mounting component 18 and the hanging bracket 19 with mounting holes 16 are mainly used for hanging installation of the housing 1 on at least one side along a third direction.

[0622] In this embodiment, the first mounting component 17, the hanging bracket 19, and the second mounting component 18 respectively meet the hanging installation requirements at different positions in different directions of the box 1.

[0623] In some embodiments, the hanging bracket 19 is bonded to the covering layer 12.

[0624] In this embodiment, the hanging bracket 19 is bonded to the covering layer 12, and the connection method of the hanging bracket 19 is relatively simple.

[0625] In some embodiments, please refer to Figure 38 and Figure 39 The battery device also includes an assembly connector that passes through the hanging bracket 19, the covering layer 12, and the second mounting member 18 to install the hanging bracket 19 to the corresponding position of the covering layer 12 on the second mounting member 18.

[0626] For example, the assembly connector is threadedly connected to the second mounting member 18.

[0627] For example, the assembly connector can be a bolt, screw, or bolt.

[0628] For example, the assembly connector passes through the hanging bracket 19, the covering layer 12 and the second mounting member 18, and the assembly connector can be interference-fitted with the second mounting member 18.

[0629] In this embodiment, the assembly connector is connected to the second mounting member 18, which enables the assembly connector to securely lock the hanging bracket 19 at the corresponding position of the second mounting member 18. This facilitates the better transfer of the load on the hanging bracket 19 at the mounting hole 16 to the second mounting member 18.

[0630] It is understood that the installation method of the hanging bracket 19 is not limited. For example, the hanging bracket 19 can be riveted to the second mounting member 18.

[0631] In some embodiments, please refer to Figures 37-39The second mounting component 18 includes a mounting body 181 and a transition component 183. The surfaces of the mounting body 181 on opposite sides along a third direction are target surfaces 182, both of which are in contact with the covering layer 12. The transition component 183 is connected to both the mounting body 181 and the pre-set support 6. The surface of the transition component 183 on the side facing away from the receiving cavity 13 along a third direction is in contact with the covering layer 12, while the surface of the transition component 183 on the side facing the receiving cavity 13 along a third direction is at least partially spaced from the covering layer 12.

[0632] The surface of the transition member 183 facing the receiving cavity 13 along the third direction is at least partially spaced from the covering layer 12, and the surface of the transition member 183 facing the receiving cavity 13 along the third direction is at least partially spaced from the covering layer 12 by a certain distance.

[0633] For example, the mounting body 181 is made of metal.

[0634] For example, the mounting body 181 is a metal block.

[0635] For example, the mounting body 181 can be made of steel or aluminum.

[0636] For example, the transition member 183 can be made of metal.

[0637] For example, the transition member 183 can be made of steel or aluminum.

[0638] For example, the transition piece 183 can be welded to the mounting body 181 and the preset support 6 respectively.

[0639] In this embodiment, the target surfaces 182 on both sides of the mounting body 181 along a third direction are in contact with the covering layer 12, so that the mounting body 181 can provide better support for the hanging bracket 19 installed at the corresponding position on the covering layer 12, which is beneficial for the hanging bracket 19 to bear the load better. The load of the hanging bracket 19 at the mounting hole 16 is transmitted to the mounting body 181, and the load transmitted to the mounting body 181 can be transmitted to the preset support 6 through the transition member 183, thereby sharing the load at the mounting hole 16 through the preset support 6.

[0640] It is understood that the specific structure of the second mounting component 18 is not limited. For example, the second mounting component 18 may not have a transition component 183, and the preset support 6 may be located close to the mounting body 181, and directly connected to the preset support 6 through the mounting body 181.

[0641] In some embodiments, please refer to Figure 39 The transition piece 183 extends along a third direction from one side target surface 182 of the mounting body 181 to the other side target surface 182.

[0642] For example, the transition member 183 can be a profile.

[0643] For example, the transition member 183 can be a block-shaped profile.

[0644] For example, the transition member 183 can be a metal profile.

[0645] For example, the transition piece 183 can be a hollow square steel.

[0646] For example, the hollow square steel serving as the transition piece 183 can be filled with a support body 11, the density of which is less than that of the transition piece 183.

[0647] The transition piece 183 extends along a third direction from one side target surface 182 of the mounting body 181 to the other side target surface 182, with the two opposite sides of the transition piece 183 along the third direction being approximately flush with the corresponding target surfaces 182.

[0648] In this embodiment, since the transition member 183 extends from one side target surface 182 to the other side target surface 182 of the mounting body 181 along a third direction, the larger size of the transition member 183 along the third direction is beneficial to supporting the mounting body 181, so that the load transmitted from the mounting hole 16 of the hanging bracket 19 to the mounting body 181 can be better transmitted to the preset support 6 through the transition member 183.

[0649] In some embodiments, please refer to Figure 38 The hanging bracket 19 is located on the side of the mounting body 181 away from the receiving cavity 13 along the third direction, and the transition piece 183 is located on the side of the mounting body 181 away from the receiving cavity 13 along the third direction.

[0650] In this embodiment, the transition member 183 is located on the side of the mounting body 181 facing away from the receiving cavity 13 along the third direction. The transition member 183 has a smaller dimension along the third direction, which helps to reduce weight and improve mass energy density. Since the hanging bracket 19 is located on the side of the mounting body 181 facing away from the receiving cavity 13 along the third direction, placing the transition member 183 on the side of the mounting body 181 facing away from the receiving cavity 13 along the third direction helps the transition member 183 to better support the mounting body 181 and the hanging bracket 19, so that the load of the hanging bracket 19 at the mounting hole 16 can be better transferred to the preset support 6.

[0651] In some embodiments, please refer to Figure 38 The transition piece 183 is plate-shaped.

[0652] For example, the thickness direction of the plate-shaped transition member 183 is arranged along a third direction.

[0653] In this embodiment, the plate-shaped transition member 183 has a simple shape and is easy to manufacture.

[0654] In some embodiments, the mounting body 181 and the transition piece 183 are integrally formed.

[0655] In this embodiment, the mounting body 181 and the transition piece 183 are integrally formed, which makes the transition piece 183 and the mounting body 181 have good integrity and is conducive to load bearing.

[0656] In some embodiments, please refer to Figure 31 , Figure 37 and Figure 40 The preset support 6 is plate-shaped. The preset support 6 has grooves 61 formed on both sides of the box body 1 and the box cover 3 along the arrangement direction. There are at least two grooves 61, and the at least two grooves 61 are arranged in sequence. The grooves 61 on both sides are arranged alternately along the arrangement direction of the at least two grooves 61.

[0657] For example, the preset support 6 is a metal plate.

[0658] For example, the preset support 6 is an aluminum plate.

[0659] For example, the cross-sectional shape of the groove 61 is square.

[0660] For example, the cross-sectional shape of the groove 61 is V-shaped.

[0661] In this embodiment, the grooves 61 on both sides are arranged alternately along the arrangement direction of at least two grooves 61, so that the plate-shaped preset support 6 has alternating concave and convex shapes, which is beneficial to improving the rigidity of the preset support 6 and giving the preset support 6 a better load-bearing capacity.

[0662] In some embodiments, please refer to Figure 31 , Figure 35 , Figure 36 , Figure 37 and Figure 40 The covering layer 12 includes a first covering layer 123 and a second covering layer 124. The first covering layer 123 surrounds a receiving cavity 13, and the material of the first covering layer 123 is a reinforced composite material, with glass fiber as the reinforcing phase. The support 11 is located within the space surrounded by the first covering layer 123 and the second covering layer 124, and the material of the second covering layer 124 is a reinforced composite material, with carbon fiber as the reinforcing phase.

[0663] For example, the second coating 124 is in contact with the target surface 182.

[0664] For example, the first mounting member 17 and the first cover 123 are arranged at a distance from each other, and the second cover 124 covers part of the surface of the first mounting member 17.

[0665] In this embodiment, the first cladding layer 123 surrounds a receiving cavity 13. The battery cell assembly located within the receiving cavity 13 is close to the first cladding layer 123 and may even be in contact with it. The reinforcing phase of the first cladding layer 123 is glass fiber, which gives it good insulation properties, thus facilitating insulation of the battery cells within the receiving cavity 13. The reinforcing phase of the second cladding layer 124 is carbon fiber, giving it high strength and reducing weight.

[0666] In some embodiments, the stiffness of the preset support 6 is greater than the stiffness of the support body 11, and the strength of the preset support 6 is greater than the strength of the support body 11.

[0667] In this embodiment, the pre-support 6 has greater stiffness and strength, which is beneficial to improving the load-bearing capacity of the pre-support 6.

[0668] For the battery device in this application embodiment, please refer to [link / reference]. Figures 31-42The battery device includes a battery cell assembly and a mounting box 100. The battery cell assembly includes battery cells, and the number of battery cell assemblies is at least two. The mounting box 100 includes a box body 1 and a box cover 3 covering the box body 1. The box body 1 includes a support body 11, a pre-support 6, a hanging device 15, and a covering layer 12 covering the outer surface of the support body 11. The covering layer 12 is made of reinforced composite material and forms a receiving cavity 13. The battery cells are located within the receiving cavity 13. The pre-support 6 is located on the side of the covering layer 12 facing the support body 11 and is connected to the support body 11. The pre-support 6 is laid on the side of the receiving cavity 13 away from the box cover 3 to support the battery cell assembly. The hanging device 15 has mounting holes 16 for hanging the box body 1. The hanging device 15 includes a mounting member that is connected to the pre-support 6 so that the load borne by the mounting holes 16 is transferred to the pre-support 6 through the mounting member. The support body 11 is made of foam material. The pre-support 6 is made of metal. The hanging device 15 is made of metal, and the mounting component is also made of metal. The covering layer 12 is made of reinforced composite material. The lid 3 is also made of reinforced composite material. The arrangement direction of the box body 1 and the lid 3 is a first direction. At least one mounting component is a first mounting component 17. The first mounting component 17 and the receiving cavity 13 are arranged along a second direction, which is intersecting the first direction. The preset support 6 is connected to the first mounting component 17 on both opposite sides along the second direction. The first mounting component 17 forms a mounting hole 16. The first mounting component 17 is made of metal. The first mounting component 17 is a metal block. The first mounting component 17 is welded to the preset support 6. The first mounting component 17 has a locking surface 171 on both opposite sides along the axial direction of the mounting hole 16. The projection area of ​​the locking surface 171 along the axial direction of the mounting hole 16 is offset from the projection area of ​​the covering layer 12 along the axial direction of the mounting hole 16. The locking surface 171 is planar. The arrangement direction of the housing 1 and the cover 3 is the first direction. At least one mounting component is a second mounting component 18. The second mounting component 18 and the receiving cavity 13 are arranged along a third direction, which intersects with the first direction. The pre-set support 6 is connected to the second mounting component 18 on at least one side along the third direction. The hanging device 15 also includes a hanging bracket 19, which is installed on the side of the covering layer 12 away from the second mounting component 18. The projection area of ​​the hanging bracket 19 along the third direction and the projection area of ​​the second mounting component 18 along the third direction at least partially overlap. The hanging bracket 19 forms a mounting hole 16. The second mounting component 18 includes a mounting body 181 and a transition component 183. The surfaces of the mounting body 181 on opposite sides along the third direction are target surfaces 182, and both target surfaces 182 are in contact with the covering layer 12. The transition member 183 is connected to the mounting body 181 and the preset support 6 respectively. The surface of the transition member 183 away from the receiving cavity 13 in the third direction contacts the covering layer 12. The surface of the transition member 183 facing the receiving cavity 13 in the third direction is at least partially spaced from the covering layer 12.The transition piece 183 extends along a third direction from one target surface 182 of the mounting body 181 to the other target surface 182. The hanging bracket 19 is located on the side of the mounting body 181 facing away from the receiving cavity 13 along a third direction, and the transition piece 183 is also located on the side of the mounting body 181 facing away from the receiving cavity 13 along a third direction. The housing 1 has good rigidity and strength at the mounting hole 16, which is beneficial for load-bearing. The hanging bracket 19 is bonded to the corresponding position of the covering layer 12, or the hanging bracket 19 is riveted to the second mounting member 18, or the hanging bracket 19 is threadedly connected to the second mounting member 18 via an assembly connector. The first mounting member 17 can be made of steel or aluminum. The second mounting member 18 can be made of steel or aluminum. The hanging bracket 19 can be made of steel or aluminum. The transition piece 183 can be made of steel plate.

[0669] In some embodiments, please refer to Figures 1-3 , Figures 12-16 The housing 1 also includes a substrate assembly 904, a rivet nut, and a target connector. The substrate assembly 904 is connected to the covering layer 12. The substrate assembly 904 includes a substrate body with a rivet hole 903. The rivet nut passes through the rivet hole 903 and is riveted to the substrate body. The target connector is threadedly connected to the rivet nut.

[0670] The substrate assembly 904 connected to the cladding layer 12 provides mounting support for the installation of the rivet nut. The substrate assembly 904 is connected to the cladding layer 12 and is fixed to the cladding layer 12.

[0671] The substrate body is the main structure of the substrate assembly 904, and the rivet nuts are riveted to the substrate body.

[0672] A rivet nut is a riveting structure with internal threads.

[0673] For example, the rivet nut can be a pull rivet nut.

[0674] For example, the rivet nut can be a press-fit nut.

[0675] For example, the target connector can be a bolt.

[0676] In this embodiment, the connection between the substrate assembly 904 and the cladding layer 12 made of reinforced composite material provides mounting support for the rivet nut. The substrate body, as the main structure of the substrate assembly 904, provides corresponding mounting support for the rivet nut, which is installed on the substrate body by riveting. The internal thread for the threaded connection with the target connector is located on the rivet nut. The plate-like substrate body does not need to provide an internal thread for connection with the target connector, and the thickness of the substrate body can be relatively thin, which helps to reduce the weight of the housing 1 and improve the mass energy density of the battery device.

[0677] In some embodiments, please refer to Figures 12-14 At least one substrate body is a first substrate body 902, a rivet nut riveted to the first substrate body 902 is a first rivet nut 901, and a target connector threaded to the first rivet nut 901 is a third connector 905. The first substrate body 902 is located in the space of the covering layer 12 facing the support body 11. The battery device also includes a bottom protective plate 906, which is located on the side of the housing 1 away from the cover 3. The third connector 905 passes through the bottom protective plate 906 to install the bottom protective plate 906 onto the housing 1.

[0678] At least one substrate body is a first substrate body 902, a rivet nut riveted to the first substrate body 902 is a first rivet nut 901, and a target connector threaded to the first rivet nut 901 is a third connector 905. The first rivet nut 901 is riveted to the first substrate body 902, and the third connector 905 is threaded to the first rivet nut 901.

[0679] For example, the first rivet nut 901 can be a pull rivet nut.

[0680] For example, the first rivet nut 901 can be a press-fit nut.

[0681] For example, the third connector 905 may be a bolt, screw, or stud.

[0682] The first substrate body 902 is located in the space of the cladding layer 12 facing the support 11. The cladding layer 12 is arranged to form a space for accommodating the support 11. The first substrate body 902 is located in the space of the cladding layer 12 facing the support 11.

[0683] For example, the first substrate body 902 and the first rivet nut 901 may be located outside the support body 11. The first substrate body 902 and the first rivet nut 901 are located in the space surrounding the support body 11 formed by the covering layer 12, but the support body 11 does not cover the first substrate body 902 and the first rivet nut 901.

[0684] For example, the first substrate body 902 and the first rivet nut 901 may be located inside the support body 11.

[0685] For example, the first rivet nut 901 may be partially located on the side of the covering layer 12 away from the support body 11.

[0686] For example, the axial direction of the first rivet nut 901 is arranged along the arrangement direction of the housing 1 and the housing cover 3, and the axial direction of the rivet hole 903 on the first base plate body 902 is arranged along the arrangement direction of the housing 1 and the housing cover 3.

[0687] For example, the bottom guard plate 906 may be made of a reinforced composite material.

[0688] For example, a third connector 905 passes through the bottom protective plate 906 to install the bottom protective plate 906 onto the housing 1. The bottom protective plate 906 is also bonded to the covering layer 12. The third connector 905 passes through the bottom protective plate 906 and is threadedly connected to the first rivet nut 901. The third connector 905 plays a role in the initial installation and positioning of the bottom protective plate 906. The bottom protective plate 906 is relatively firmly connected to the covering layer 12 by adhesive.

[0689] For example, the bottom protective plate 906 is coated with adhesive and bonded to the covering layer 12.

[0690] In this embodiment, the first substrate body 902 located in the space on the side of the covering layer 12 facing the support body 11 and the first rivet nut 901 riveted to the first substrate body 902 provide a mounting support for the installation of the bottom cover plate 906. The bottom cover plate 906 is installed on the housing 1 by means of a third connector 905 passing through the bottom cover plate 906 and being threadedly connected to the first rivet nut 901. The internal thread for threaded connection with the third connector 905 is located in the first rivet nut 901. The first substrate body 902 does not need to be provided with an internal thread for threaded connection with the third connector 905. The first substrate body 902 can be made thinner, which is beneficial for reducing the weight of the battery device and improving the mass energy density of the battery device.

[0691] In some embodiments, please refer to Figures 12-14 The substrate assembly 904 also includes a second adhesive layer 907, which is bonded to the first substrate body 902 and the covering layer 12 respectively.

[0692] For example, the second adhesive layer 907 can be formed by solidifying liquid adhesive.

[0693] For example, the second adhesive layer 907 can be a solid adhesive.

[0694] In this embodiment, the second adhesive layer 907 is bonded to the first substrate body 902 and the covering layer 12 respectively. By bonding with adhesive layers, the substrate assembly 904 including the first substrate body 902 can be connected to the covering layer 12 in a relatively simple way.

[0695] It is understood that the specific structure of the substrate assembly 904 is not limited. For example, the substrate assembly 904 includes a first substrate body 902 but does not include a second adhesive layer 907, and the first substrate body 902 is connected to the cover layer 12.

[0696] In some embodiments, please refer to Figures 12-14The first substrate body 902 includes a main substrate 908 and an auxiliary substrate 909. The main substrate 908 is riveted to a first rivet nut 901, and the main substrate 908 and the first rivet nut 901 are arranged axially intersectingly. A second adhesive layer 907 is partially located between the main substrate 908 and the covering layer 12 to bond the main substrate 908 and the covering layer 12 respectively. The auxiliary substrate 909 is connected to the main substrate 908, and the auxiliary substrate 909 protrudes from the main substrate 908 on one side along the axial direction of the first rivet nut 901 toward the bottom cover plate 906. The second adhesive layer 907 is partially located between the auxiliary substrate 909 and the covering layer 12 to bond the auxiliary substrate 909 and the covering layer 12 respectively.

[0697] The main base plate 908 is the main structure used to install the first rivet nut 901.

[0698] The auxiliary substrate 909 is connected to the main substrate 908 to increase the adhesive area of ​​the first substrate body 902.

[0699] The second adhesive layer 907 is partially located between the main substrate 908 and the cladding layer 12 to bond the main substrate 908 and the cladding layer 12 respectively. The second adhesive layer 907 is partially located between the auxiliary substrate 909 and the cladding layer 12 to bond the auxiliary substrate 909 and the cladding layer 12 respectively. The second adhesive layer 907 spans across the main substrate 908 and the auxiliary substrate 909.

[0700] For example, the main substrate 908 can be a flat panel.

[0701] For example, the auxiliary substrate 909 can be an arc-shaped plate.

[0702] For example, the auxiliary substrate 909 may be arranged to extend circumferentially along the main substrate 908.

[0703] For example, the main substrate 908 and the auxiliary substrate 909 are perpendicular.

[0704] In this embodiment, the auxiliary substrate 909 protrudes from the main substrate 908 along the axial direction of the first rivet nut 901 toward the bottom cover plate 906, so that the main substrate 908 and the auxiliary substrate 909 are arranged in a roughly cross shape. The second adhesive layer 907 spans the cross-arranged main substrate 908 and auxiliary substrate 909, so that the first substrate body 902 has a large adhesive area, which is beneficial to the first substrate body 902 and the covering layer 12 being bonded more firmly.

[0705] It is understood that the specific structure of the first substrate body 902 is not limited. For example, the first substrate body 902 may include a main substrate 908 but not an auxiliary substrate 909. For example, the first substrate body 902 may include an auxiliary substrate 909 but not a main substrate 908, and the auxiliary substrate 909 is riveted to a first rivet nut 901.

[0706] In some embodiments, please refer to Figures 12-14 The main substrate 908, the auxiliary substrate 909, and the covering layer 12 are arranged to form an adhesive storage cavity 910. The adhesive storage cavity 910 is located on the side of the main substrate 908 facing the bottom guard plate 906 along the axial direction of the first rivet nut 901. The surface of the first substrate body 902 facing the adhesive storage cavity 910 is the first bonding surface 911. The first bonding surface 911 spans the main substrate 908 and the auxiliary substrate 909. The second adhesive layer 907 is at least partially located in the adhesive storage cavity 910 to bond with the first bonding surface 911 and the covering layer 12 respectively.

[0707] The main substrate 908 and the auxiliary substrate 909 are arranged in a cross manner, and the first adhesive surface 911 spans the main substrate 908 and the auxiliary substrate 909. The cross-section of the first adhesive surface 911 is approximately L-shaped.

[0708] The second adhesive layer 907 is bonded to the first adhesive surface 911 and the covering layer 12 respectively, and the second adhesive layer 907 is at least partially located in the adhesive storage cavity 910.

[0709] In this embodiment, the direction of the first substrate body 902 toward the adhesive storage cavity 910 is approximately the thickness direction of the first substrate body 902. The first adhesive surface 911 on the side of the first substrate body 902 facing the adhesive storage cavity 910 spans the main substrate 908 and the auxiliary substrate 909, so that the first adhesive surface 911 has a large adhesive area. The second adhesive layer 907 is bonded to the first adhesive surface 911 and the covering layer 12 respectively, which is beneficial to the second adhesive layer 907 and the first substrate body 902 being bonded more firmly.

[0710] It is understood that the arrangement of the second adhesive layer 907 of the battery device is not limited. For example, the adhesive storage cavity 910 can be left empty, that is, the second adhesive layer 907 is located outside the adhesive storage cavity 910.

[0711] In some embodiments, please refer to Figures 12-14 The surface of the first substrate body 902 facing away from the adhesive storage cavity 910 is a preset surface 912. Among the surfaces of the first substrate body 902, the surface connecting the first adhesive surface 911 and the preset surface 912 is a second adhesive surface 913. The second adhesive layer 907 is bonded to the second adhesive surface 913 and the covering layer 12 respectively. The second adhesive layer 907 spans across the first adhesive surface 911 and the second adhesive surface 913.

[0712] For example, the second adhesive surface 913 spans across the main substrate 908 and the auxiliary substrate 909.

[0713] For example, the second adhesive surface 913 surrounds the first substrate body 902.

[0714] For example, the second adhesive surface 913 surrounds the first adhesive surface 911.

[0715] In this embodiment, the second adhesive layer 907 spans across the first adhesive surface 911 and the second adhesive surface 913. The first adhesive surface 911, the second adhesive surface 913, and the covering layer 12 are bonded to the second adhesive layer 907, increasing the bonding area between the second adhesive layer 907 and the first substrate body 902, thus making the first substrate body 902 and the second adhesive layer 907 bonded more firmly.

[0716] It is understood that the specific arrangement of the second adhesive layer 907 is not limited. For example, the adhesive storage cavity 910 can be empty, the second adhesive layer 907 is not in contact with the first adhesive surface 911, and the second adhesive layer 907 is bonded to both the second adhesive surface 913 and the covering layer 12. Alternatively, the second adhesive layer 907 may be completely located within the adhesive storage cavity 910, with the second adhesive layer 907 not in contact with the second adhesive surface 913 and bonded to both the first adhesive surface 911 and the covering layer 12.

[0717] In some embodiments, please refer to Figures 12-14 The area of ​​the first bonding surface 911 is 420 mm². 2 ~1000mm 2 .

[0718] For example, the area of ​​the first adhesive surface 911 can be 420 mm². 2 500mm 2 620mm 2 700mm 2 800mm 2 850mm 2 920mm 2 Or 1000mm 2 .

[0719] In this embodiment, the area of ​​the first adhesive surface 911 is 420 mm². 2 ~1000mm 2 On the one hand, this makes the area of ​​the first adhesive surface 911 large enough so that the first substrate body 902 and the covering layer 12 can be bonded more firmly. On the other hand, it can suppress the area of ​​the first adhesive surface 911 from being too large to a certain extent, reduce the amount of adhesive used in the second adhesive layer 907, and help save costs.

[0720] It is understood that the area of ​​the first adhesive surface 911 can be determined according to actual needs. For example, the area of ​​the first adhesive surface 911 can be less than 420 mm². 2 For example, the area of ​​the first adhesive surface 911 can be greater than 1000 mm². 2 .

[0721] In some embodiments, please refer to Figure 2 , Figures 12-14The covering layer 12 is configured to form a target groove 914. The target groove 914 is located on the side of the covering layer 12 away from the first substrate body 902. The groove wall of the target groove 914 protrudes from the side of the covering layer 12 facing the first substrate body 902. The groove wall of the target groove 914 includes a first wall 915 and a second wall 916 connected to each other. The first wall 915 and the main substrate 908 are arranged opposite to each other along the axial direction of the first rivet nut 901. The second wall 916 is arranged opposite to the auxiliary substrate 909 along the radial direction of the first rivet nut 901. The second wall 916 extends circumferentially along the first wall 915. The first wall 915, the second wall 916, the main substrate 908 and the auxiliary substrate 909 are configured to form an adhesive storage cavity 910. The second adhesive layer 907 is bonded to the first wall 915, the second wall 916 and the first adhesive surface 911 respectively.

[0722] The wall of the target groove 914 protrudes from the side of the covering layer 12 facing the first substrate body 902, so that the wall of the target groove 914 forms a structure that is arranged opposite to the corresponding part of the first substrate body 902.

[0723] The first wall 915 and the main substrate 908 are arranged opposite each other along the axial direction of the first rivet nut 901, and the second wall 916 is arranged opposite to the auxiliary substrate 909 along the radial direction of the first rivet nut 901. The main substrate 908 and the auxiliary substrate 909 are arranged intersectingly, and correspondingly the first wall 915 and the second wall 916 are arranged intersectingly.

[0724] Both the first wall 915 and the second wall 916 are bonded to the second adhesive layer 907 to achieve bonding between the covering layer 12 and the second adhesive layer 907.

[0725] For example, the first wall 915 and the second wall 916 are perpendicular.

[0726] For example, the bottom guard plate 906 partially protrudes into the target groove 914, through which the bottom guard plate 906 can be positioned.

[0727] In this embodiment, the first wall 915, the second wall 916, the main substrate 908, and the auxiliary substrate 909 form an adhesive storage cavity 910. The second adhesive layer 907 is bonded to the first wall 915, the second wall 916, and the first bonding surface 911. Since the first wall 915 and the main substrate 908 are arranged opposite each other along the axial direction of the first rivet nut 901, and the second wall 916 is arranged opposite to the auxiliary substrate 909 along the radial direction of the first rivet nut 901, the first wall 915 and the second wall 916 are arranged intersectingly, so that the first wall 915 and the second wall 916 have a large bonding area. Moreover, the first wall 915 and the second wall 916 are relatively close to the first bonding surface 911. This not only enables the second adhesive layer 907 to be bonded more firmly at the location of the first wall 915 and the second wall 916 of the covering layer 12, but also reduces the amount of adhesive used in the second adhesive layer 907 to a certain extent, thus saving costs.

[0728] It is understood that the specific structure of the covering layer 12 is not limited. For example, the covering layer 12 may not have a target groove 914 at the position corresponding to the first adhesive surface 911 of the first substrate body 902.

[0729] In some embodiments, please refer to Figures 12-14 The minimum wall thickness of the riveting hole 903 of the first substrate body 902 is greater than or equal to 3 mm.

[0730] For example, the minimum wall thickness of the riveting hole 903 of the first substrate body 902 is D12, where D12≤3mm.

[0731] For example, the minimum wall thickness of the riveting hole 903 of the first substrate body 902 can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm.

[0732] In this embodiment, the minimum wall thickness of the riveting hole 903 of the first substrate body 902 is sufficiently thick to reduce the possibility of the hole wall at the edge of the riveting hole 903 being crushed.

[0733] It is understood that the minimum wall thickness of the riveting hole 903 of the first substrate body 902 is not specifically limited. For example, the minimum wall thickness of the riveting hole 903 of the first substrate body 902 may be less than 3 mm depending on the circumstances.

[0734] In some embodiments, please refer to the figure, the first substrate body 902 is made of metal or reinforced composite material.

[0735] For example, the material of the first substrate body 902 is metal, specifically aluminum.

[0736] In some embodiments, please refer to Figures 12-14 The first substrate body 902 is made of metal and has a thickness of 1mm to 3mm.

[0737] For example, the thickness of the first substrate body 902 is D13, where 1mm ≤ D13 ≤ 3mm.

[0738] For example, the thickness of the first substrate body 902 can be 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.7 mm, 2 mm, 2.1 mm, 2.5 mm, 2.7 mm or 3 mm.

[0739] In this embodiment of the application, for the first substrate body 902 made of metal, the thickness of the first substrate body 902 is 1mm to 3mm, so that the first substrate body 902 can better bear the load transmitted by the first rivet nut 901, and the first substrate body 902 made of metal is not too thick, which is beneficial to saving costs.

[0740] In some embodiments, please refer to Figures 12-14 The material of the first substrate body 902 is an enhanced composite material, and the thickness of the first substrate body 902 is 1.5mm~3mm.

[0741] For example, the thickness of the first substrate body 902 can be 1.5mm, 1.7mm, 2mm, 2.1mm, 2.3mm, 2.5mm, 2.6mm, 2.7mm, 2.9mm or 3mm.

[0742] In this embodiment of the application, for the first substrate body 902 made of reinforced composite material, the thickness of the first substrate body 902 is 1.5mm to 3mm, which enables the first substrate body 902 to better bear the load transmitted by the first rivet nut 901, and the first substrate body 902 made of reinforced composite material is not too thick, which is beneficial to saving costs.

[0743] In some embodiments, please refer to Figures 12-14 Partial covering layer 12 covers the first rivet nut 901 on one side of the first rivet nut 901 toward the bottom guard plate 906 along the axial direction of the first rivet nut 901.

[0744] For example, a portion of the covering layer 12 covers the area beneath the first rivet nut 901.

[0745] In this embodiment, a portion of the covering layer 12 covers the side of the first rivet nut 901 facing the bottom guard plate 906 along the axial direction of the first rivet nut 901. The side of the first rivet nut 901 facing the bottom guard plate 906 is shielded by the covering layer 12, reducing the exposure of the rivet nut and reducing the corrosion of the rivet nut by the external environment.

[0746] It is understood that the specific arrangement of the first rivet nut 901 is not limited. For example, the side of the first rivet nut 901 facing the bottom guard plate 906 along the axial direction of the first rivet nut 901 is offset from the covering layer 12, so that the side of the first rivet nut 901 facing the bottom guard plate 906 along the axial direction of the first rivet nut 901 is exposed in the covering layer 12.

[0747] In some embodiments, please refer to Figure 2 and Figure 15At least one substrate body is a second substrate body 917. The second substrate body 917 is connected to the side of the covering layer 12 away from the support body 11. The rivet nut riveted to the second substrate body 917 is a second rivet nut 918. The target connector threaded to the second rivet nut 918 is a fourth connector 919. The fourth connector 919 passes through the cover 3 to install the cover 3 onto the box body 1.

[0748] At least one substrate body is a second substrate body 917, which is connected to the side of the cladding layer 12 away from the support body 11, and provides mounting support for the second rivet nut 918 through the second substrate body 917.

[0749] The second rivet nut 918 provides a locking position for the installation of the cover 3 and the body 1.

[0750] The fourth connector 919 is a structure that locks the box cover 3 and the box body 1 together.

[0751] For example, the second substrate body 917 is a flat plate.

[0752] For example, the second rivet nut 918 can be a pull rivet nut or a press rivet nut.

[0753] For example, the fourth connector 919 is a bolt, screw, or stud.

[0754] In this embodiment, the second substrate body 917 is connected to the side of the cladding layer 12 opposite to the support 11. The second substrate body 917 is exposed outside the cladding layer 12, facilitating the locking of the cover 3 by the second rivet nut 918 mounted on the second substrate body 917 via the fourth connector 919. The internal thread for threaded connection with the fourth connector 919 is located in the second rivet nut 918. The second substrate body 917 does not need to have an internal thread for threaded connection with the fourth connector 919, allowing the second substrate body 917 to be made thinner, which helps to reduce the weight of the battery device and improve the mass energy density of the battery device.

[0755] In some embodiments, please refer to Figure 2 and Figure 15 The second substrate body 917 is made of reinforced composite material.

[0756] In this embodiment, the material of the second substrate body 917 is a reinforced composite material. The second substrate body 917 has good support strength, which is beneficial for locking the box cover 3 well by means of the fourth connector 919 and the second rivet nut 918 installed on the second substrate body 917.

[0757] It is understandable that the material of the second substrate body 917 is not limited, and the second substrate body 917 may be made of materials other than reinforced composite materials, depending on the circumstances.

[0758] In some embodiments, please refer to Figure 2 and Figure 15 The second substrate body 917 and at least a portion of the structure of the covering layer 12 are integrally formed.

[0759] The second substrate body 917 is integrally formed with at least a portion of the structure of the cladding layer 12. The cladding layer 12 is made of reinforced composite material. The material of the second substrate body 917 is the same as that of at least a portion of the structure of the cladding layer 12. The material of the second substrate body 917 is also reinforced composite material.

[0760] For example, the second substrate body 917 and the second cover layer 124 are integrally formed.

[0761] In this embodiment, at least a portion of the structure of the second substrate body 917 and the cladding layer 12 is integrally formed, and the second substrate body 917 and the cladding layer 12 have good integrity, so that the second substrate body 917 has good load-bearing capacity.

[0762] It is understood that the mounting method of the second substrate body 917 is not limited. For example, the second substrate body 917 can be mounted to the cladding layer 12 by additional mounting components.

[0763] In some embodiments, please refer to Figure 2 and Figure 15 The thickness of the second substrate body 917 is 1.5mm to 3mm.

[0764] For example, the thickness of the second substrate body 917 can be 1.5mm, 1.6mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.5mm, 2.7mm or 3mm.

[0765] In this embodiment of the application, for the second substrate body 917 made of reinforced composite material, the thickness of the second substrate body 917 is 1.5mm to 3mm, which enables the second substrate body 917 to better bear the load transmitted through the second rivet nut 918, and the second substrate body 917 made of reinforced composite material is not too thick, which is beneficial to saving costs.

[0766] In some embodiments, please refer to Figure 2 and Figure 15 The battery assembly also includes a third adhesive layer 920, which is bonded to the inner surface of the rivet nut and between the target connector.

[0767] For example, the third adhesive layer 920 may be formed by solidifying a liquid adhesive.

[0768] For example, the third adhesive layer 920 can be a solid adhesive.

[0769] For example, the target connector can be a bolt, screw, or stud.

[0770] In this embodiment, the third adhesive layer 920 is bonded between the inner surface of the rivet nut and the target connector, so that the target connector and the rivet nut can be kept as tight as possible, reducing the possibility of the target connector and the rivet nut being loosened.

[0771] It is understood that the specific structure of the battery device is not limited. For example, the third adhesive layer 920 may not be provided between the inner surface of the rivet nut and the target connector.

[0772] In some embodiments, please refer to Figure 14 The cross-sectional shape of the rivet hole 903 is polygonal, and the outer surface of the rivet nut has a limiting surface 921 that contacts the plane corresponding to the edge of the polygon. The number of limiting surfaces 921 is at least two, and the at least two limiting surfaces 921 are arranged sequentially along the circumference of the rivet nut.

[0773] The cross-sectional shape of the rivet hole 903 is polygonal, and the cross-section of the rivet hole 903 is perpendicular to the axis of the rivet hole 903.

[0774] For example, the limiting surface 921 is a plane.

[0775] For example, the number of limiting faces 921 for each rivet nut is six.

[0776] In this embodiment of the application, the outer surface of the rivet nut is restricted from rotating by the limiting surface 921 contacting the plane corresponding to the edge of the polygon.

[0777] It is understood that the specific structure of the rivet hole 903 and the specific structure of the rivet nut are not limited. For example, the cross-sectional shape of the rivet hole 903 is circular, the surface of the hole wall of the rivet hole 903 can be a cylindrical surface, and the outer surface of the rivet nut can be a cylindrical surface.

[0778] In some embodiments, please refer to Figure 8 The support body 11 is made of reinforced composite material.

[0779] In this embodiment, the reinforced composite material has high strength, and the material of the support 11 is a reinforced composite material, which is beneficial to improving the strength of the box 1 and increasing the load-bearing capacity of the box 1.

[0780] In some embodiments, the support 11 is made of foam material.

[0781] In this embodiment, the foam material has a low density, and the material of the support 11 is foam material, which helps to reduce the weight of the box 1.

[0782] In some embodiments, the thickness of the covering layer 12 is greater than or equal to 1.4 mm.

[0783] For example, the thickness of the covering layer 12 can be 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2 mm.

[0784] In this embodiment of the application, the thickness of the covering layer 12 is greater than or equal to 1.4 mm, which makes the thickness of the covering layer 12 sufficiently thick, and the thickness of the covering layer 12 basically meets the load-bearing requirements of the box 1.

[0785] It is understood that the specific thickness of the covering layer 12 is not limited. For example, the thickness of the covering layer 12 may be less than 1.4 mm.

[0786] In some embodiments, please refer to Figure 1 and Figure 2 as well as Figure 8 The covering layer 12 includes a first covering layer 123 and a second covering layer 124. The first covering layer 123 surrounds a receiving cavity 13. The material of the first covering layer 123 is a reinforced composite material, and the reinforcing phase of the first covering layer 123 is glass fiber. The support 11 is located within the space surrounded by the first covering layer 123 and the second covering layer 124. The material of the second covering layer 124 is a reinforced composite material, and the reinforcing phase of the second covering layer 124 is carbon fiber. The substrate assembly 904 is connected to the second covering layer 124.

[0787] For example, please refer to Figure 13 The second adhesive layer 907 is bonded to the first substrate body 902 and the second cover layer 124 respectively.

[0788] For example, please refer to Figure 15 The second cladding layer 124 is connected to the second substrate body 917.

[0789] For example, the second cladding layer 124 is integrally formed with the second substrate body 917, the material of the second substrate body 917 is a reinforced composite material, and the reinforcing phase of the second substrate body 917 is carbon fiber.

[0790] In this embodiment, the first cladding layer 123 surrounds a receiving cavity 13. The battery cell assembly located within the receiving cavity 13 is close to the first cladding layer 123 and may even be in contact with it. The reinforcing phase of the first cladding layer 123 is glass fiber, which gives it good insulation properties, thus facilitating insulation of the battery cells within the receiving cavity 13. The reinforcing phase of the second cladding layer 124 is carbon fiber, giving it high strength and reducing weight. The substrate assembly 904 is connected to the high-strength second cladding layer 124, which helps the substrate assembly 904 better bear the load transmitted by the rivet nut.

[0791] It is understood that the specific structure of the cladding layer 12 is not limited. For example, the cladding layer 12 is made of the same type of reinforced composite material with the same reinforcing phase.

[0792] In some embodiments, the rivet nut and / or the target connector are made of corrosion-resistant materials.

[0793] For example, the rivet nut is made of a corrosion-resistant material.

[0794] For example, the target connector is made of a corrosion-resistant material.

[0795] For example, the rivet nut and the target connector are made of corrosion-resistant materials.

[0796] In this embodiment, the rivet nut is made of a corrosion-resistant material, which helps to suppress the electro-corrosion of the rivet nut caused by the potential difference between the coating layer 12 and the rivet nut. The target connector is also made of a corrosion-resistant material, which helps to suppress the electro-corrosion of the target connector caused by the potential difference between the coating layer 12 and the target connector.

[0797] In some embodiments, the corrosion-resistant material is stainless steel or titanium alloy.

[0798] In some embodiments, a corrosion-resistant protective layer is formed on the exterior of the rivet nut and / or the exterior of the target connector.

[0799] In this embodiment, an additional corrosion-resistant protective layer is added to the outside of the rivet nut, which helps to suppress the electro-corrosion of the rivet nut caused by the potential difference between the coating layer 12 and the rivet nut. The corrosion-resistant protective layer formed on the outside of the target connector helps to suppress the electro-corrosion of the target connector caused by the potential difference between the coating layer 12 and the target connector.

[0800] In some embodiments, the corrosion-resistant protective layer includes at least one of a zinc plating layer, a zinc-nickel plating layer, an electrophoretic treatment layer, and a Dacromet treatment layer.

[0801] For example, a zinc plating layer is first plated on the outer surface of the target connector, and then a zinc-nickel plating layer is plated on the outside of the zinc plating layer.

[0802] For example, a zinc plating layer is first plated on the outer surface of the target connector, and then an electrophoretic treatment layer is formed.

[0803] For the battery device in this application embodiment, please refer to [link / reference]. Figures 1-16The battery device includes a battery cell and a mounting box 100. The mounting box 100 includes a box body 1, which includes a support body 11 and a covering layer 12 covering the outer surface of the support body 11. The covering layer 12 is made of reinforced composite material and forms a receiving cavity 13. The battery cell is located within the receiving cavity 13. The box body 1 has a receiving hole penetrating the support body 11 and the covering layer 12. The outer surface of the covering layer 12 that coincides with the openings at both ends of the receiving hole along its axial direction is a first surface. A mounting component includes a main pad and a first sleeve 22. Main pads are provided at opposite ends of the receiving hole along its axial direction. The first surfaces at both ends are located between the two main pads. The first sleeve 22 passes through the receiving hole, and its two ends are connected to the corresponding main pads. The hardness of the main pad is greater than or equal to 32HB, and the hardness of the first sleeve 22 is greater than or equal to 32HB. The hardness of the main pad and the first sleeve 22 are both greater than the hardness of the covering layer 12. The main pad is made of copper alloy, aluminum alloy, or steel; and / or, the first sleeve 22 is made of copper alloy, aluminum alloy, or steel. The first sleeve 22 includes two sub-sleeves arranged axially along the receiving hole. Each sub-sleeve is connected to the main pad at its corresponding end. When the mounting component is in a locked state, the two sub-sleeves abut against each other at their adjacent ends. Each sub-sleeve is integrally formed with the corresponding main pad. The housing 1 also includes a base plate assembly 904, a rivet nut, and a target connector. The base plate assembly 904 is connected to the covering layer 12. The base plate assembly 904 includes a base plate body with a riveting hole 903. The rivet nut passes through the riveting hole 903 and is riveted to the base plate body. The target connector is threadedly connected to the rivet nut. The rivet nut is a pull rivet nut. The cross-sectional shape of the riveting hole 903 is hexagonal. At least one substrate body is a first substrate body 902, a rivet nut riveted to the first substrate body 902 is a first rivet nut 901, and a target connector threaded to the first rivet nut 901 is a third connector 905. The first substrate body 902 is located in the space on the side of the covering layer 12 facing the support body 11. The battery device also includes a bottom protective plate 906, which is located on the side of the housing 1 away from the cover 3. The third connector 905 passes through the bottom protective plate 906 to install the bottom protective plate 906 onto the housing 1. The substrate assembly 904 also includes a second adhesive layer 907, which is bonded to the first substrate body 902 and the covering layer 12 respectively. The first substrate body 902 is made of metal, specifically aluminum, and the second adhesive layer 907 is bonded to both the first substrate body 902 and the covering layer 12. At least one substrate body is a second substrate body 917. The second substrate body 917 is connected to the side of the covering layer 12 away from the support body 11. The rivet nut riveted to the second substrate body 917 is a second rivet nut 918. The target connector threaded to the second rivet nut 918 is a fourth connector 919. The fourth connector 919 passes through the cover 3 to install the cover 3 onto the box body 1.The rivet nut and / or the target connector are made of a corrosion-resistant material. The corrosion-resistant material is stainless steel or titanium alloy. A corrosion-resistant protective layer is formed on the exterior of the rivet nut and / or the target connector. The corrosion-resistant protective layer includes at least one of a zinc plating layer, a zinc-nickel plating layer, an electrophoretic treatment layer, and a Dacromet coating layer. The thickness of the coating layer 12 is greater than or equal to 1.4 mm.

[0804] For example, two sub-sleeves abut at their adjacent ends, with at least one main pad layer spaced apart from the covering layer 12 along the axial direction of the receiving hole. The main pad layers at both ends are also spaced apart from the covering layer 12 along the axial direction of the receiving hole.

[0805] For example, when the mounting component is unsecured, the two sub-sleeves are arranged axially spaced along the receiving hole, and the main pads at both ends are in contact with the covering layer 12.

[0806] Please see Figure 43 and Figure 44 In some embodiments, the first cover 123 includes a first fiber fabric C11, the second cover 124 includes a second fiber fabric C21, the first fiber fabric C11 includes a plurality of first fibers C111, the second fiber fabric C21 includes a plurality of second fibers C211, and the first fibers C111 are different from the second fibers C211.

[0807] In this embodiment, the fiber fabric can be a structure woven from multiple fibers, and the weaving can be plain weave, twill weave, satin weave, etc. Since the first cover 123 and the second cover 124 also include a substrate for bonding and curing, in some examples, the multiple fibers in the fiber fabric can also be arranged in a non-intersecting form, such as multiple fibers arranged in parallel.

[0808] In this embodiment, the first fiber fabric C11 and the second fiber fabric C21 may employ the same or different weaving methods. The difference between the first fiber C111 and the second fiber C211 specifically refers to the different materials of the first fiber C111 and the second fiber C211, and is not a limitation on the structure of the first fiber C111 and the second fiber C211.

[0809] In the technical solution of this application embodiment, the first covering layer 123 includes a first fiber fabric C11 woven from multiple first fibers C111, and the second covering layer 124 includes a second fiber fabric C21 woven from multiple second fibers C211. The fiber fabric has high structural strength and load-bearing capacity, which helps to improve the load-bearing and protective capacity of the box 1.

[0810] In some embodiments, the density of the second fiber C211 is less than the density of the first fiber C111.

[0811] In some examples, the first fiber C111 includes glass fiber, basalt fiber, aramid fiber, etc., and the second fiber C211 includes carbon fiber and polyethylene fiber. The densities of the various fibers, from smallest to largest, are polyethylene fiber density < aramid fiber density < carbon fiber density < glass fiber density < basalt fiber density.

[0812] In some examples, the second fiber C211 is polyethylene fiber, and the first fiber C111 is one or more of glass fiber, basalt fiber, and aramid fiber.

[0813] In some examples, the second fiber C211 is carbon fiber, and the first fiber C111 is one or more of glass fiber and basalt fiber.

[0814] In some examples, the first fiber C111 is made of a high-density material, such as carbon fiber, which has good insulation properties. The second fiber C211 is made of a low-density material, such as polyethylene fiber, which facilitates the lightweighting of the housing 1.

[0815] In some examples, the first cover 123 and the second cover 124 use the same substrate, and the first fiber C111 and the second fiber C211 use different sealing fibers; in other examples, the first cover 123 and the second cover 124 may also use substrates of different densities, for example, the density of the substrate in the first cover 123 is less than the density of the substrate in the composite layer, which helps to reduce the weight of the first cover 123.

[0816] In the technical solution of this application embodiment, the first coating 123 is made of a material with a higher density, which helps to improve insulation performance; the second coating 124 is made of a material with a lower density, which helps to reduce weight and facilitates the lightweight design of the battery device.

[0817] In some embodiments, the first fiber C111 includes at least one of glass fiber, basalt fiber, and aramid fiber; and / or, the second fiber C211 includes at least one of carbon fiber and polyethylene fiber.

[0818] In some examples, the first fiber C111 is glass fiber, and the second fiber C211 is carbon fiber. The second cladding 124 made of glass fiber has advantages such as high strength, light weight, good insulation, and corrosion resistance; the first cladding 123 made of carbon fiber has advantages such as high strength, low density, corrosion resistance, and good thermal stability.

[0819] In some examples, the first fiber C111 is glass fiber, and the second fiber C211 is polyethylene fiber. The second cladding 124 made of glass fiber has advantages such as high strength, light weight, good insulation, and corrosion resistance; the first cladding 123 made of polyethylene fiber has advantages such as high strength and toughness, low density, and ease of processing.

[0820] In some examples, the first fiber C111 is basalt fiber, and the second fiber C211 is carbon fiber. The second cladding 124 made of basalt fiber has advantages such as good mechanical properties, good fire resistance and flame retardancy, strong insulation and electromagnetic shielding capabilities, and corrosion resistance; the first cladding 123 made of carbon fiber has advantages such as high strength, low density, corrosion resistance, and good thermal stability.

[0821] In some examples, the first fiber C111 is basalt fiber, and the second fiber C211 is polyethylene fiber. The second cladding 124 made of basalt fiber has advantages such as good mechanical properties, good fire resistance and flame retardancy, strong insulation and electromagnetic shielding capabilities, and corrosion resistance; the first cladding 123 made of polyethylene fiber has advantages such as high strength and toughness, low density, and ease of processing.

[0822] In some examples, the first fiber C111 is aramid fiber, and the second fiber C211 is carbon fiber. The second cladding 124 made of aramid fiber has advantages such as high strength, low density, impact resistance, good insulation, high temperature resistance, and easy processing; the first cladding 123 made of carbon fiber has advantages such as high strength, low density, corrosion resistance, and good thermal stability.

[0823] In some examples, the first fiber C111 is aramid fiber, and the second fiber C211 is polyethylene fiber. The second coating 124 made of aramid fiber has advantages such as high strength, low density, impact resistance, good insulation, high temperature resistance, and easy processing; the first coating 123 made of polyethylene fiber has advantages such as high strength and toughness, low density, and easy processing.

[0824] In the technical solution of this application embodiment, the first fiber C111 and the second fiber C211 can be selected from suitable materials according to requirements, so as to be applied to a variety of different scenarios and improve the adaptability of the battery device.

[0825] In some embodiments, the first fiber C111 is glass fiber, and the second fiber C211 is carbon fiber. In the technical solution of this application embodiment, the first fiber C111 is glass fiber. The glass fiber prepreg has advantages such as excellent insulation performance, high structural strength, and lightweight, so that the first cladding 123 containing glass fiber has better insulation performance, higher structural strength, and higher elasticity, which can meet the impact resistance requirements and lightweight design of the housing 1. The second fiber C211 is carbon fiber. The second cladding 124 made of carbon fiber has advantages such as high strength, low density, corrosion resistance, and good thermal stability. It is lightweight and has good structural strength, which can meet the impact resistance requirements and lightweight design of the housing 1.

[0826] In some embodiments, the number of layers of the first fiber fabric C11 in the first cover 123 is less than or equal to the number of layers of the second fiber fabric C21 in the second cover 124.

[0827] In this embodiment, the number of layers of the first fiber fabric C11 at different positions of the box 1 corresponding to the first covering 123 may be the same or different, and the number of layers of the first fiber fabric C11 at different positions of the box 1 corresponding to the second covering 124 may be the same or different. In some examples, the bottom wall of the box 1 is a third wall 120, the number of layers of the first fiber fabric C11 in the first covering 123 of the third wall 120 is the same as that in the first covering 123 of the side wall of the box 1, and the number of layers of the second fiber fabric C21 in the second covering 124 of the third wall 120 is the same as that in the second covering 124 of the side wall, and the number of layers of the second fiber fabric C21 is greater than that of the first fiber fabric C11.

[0828] In some examples, the number of layers of the second fiber fabric C21 in the second cover 124 is equal to the number of layers of the first fiber fabric C11 in the first cover 123; in other examples, the number of layers of the first fiber fabric C11 in the first cover 123 is less than the number of layers of the second fiber fabric C21 in the second cover 124.

[0829] In the technical solution of this application embodiment, the first covering layer 123 is provided with a smaller number of first fiber fabric C11 layers, which helps to reduce material consumption and reduce the wall thickness of the box 1; the second covering layer 124 is provided with a larger number of second fiber fabric C21 layers, which helps to improve structural strength.

[0830] In some embodiments, the number of layers of the first fiber fabric C11 in the first cover 123 is 1-3; and / or, the number of layers of the second fiber fabric C21 in the second cover 124 is 2-15.

[0831] In this embodiment, the first fiber fabric C11 in the first covering 123 has a larger number of layers, which can provide better protective performance; the first fiber fabric C11 in the first covering 123 has a smaller number of layers, which helps to reduce the weight of the box 1.

[0832] In some examples, the first covering 123 includes one layer of first fiber fabric C11; in other examples, the first covering 123 includes two layers of first fiber fabric C11; in still other examples, the first covering 123 includes three layers of first fiber fabric C11; two or more layers of first fiber fabric C11 are joined together.

[0833] In this embodiment, the second fiber fabric C21 in the second cover 124 has a larger number of layers, which can provide better support performance; the second fiber fabric C21 in the second cover 124 has a smaller number of layers, which helps to reduce the weight of the box 1.

[0834] In some examples, the number of layers of the second fiber fabric C21 in the second covering layer 124 ranges from 2 to 15; for example, the second fiber fabric C21 has 2, 5, 7, 10, 13, or 15 layers, etc. The specific selection can be made according to the needs.

[0835] The technical solution of this application embodiment sets the number of layers of the first fiber fabric C11 in the first insulation layer within a suitable range. This allows for a significant reduction in the weight of the housing 1 while ensuring good insulation performance of the first covering layer 123, facilitating a lightweight design for the housing 1. Similarly, maintaining the number of layers of the second fiber fabric C21 in the second covering layer 124 within a suitable range allows for minimizing the total thickness and weight of the second covering layer 124 while ensuring its structural strength.

[0836] Reference Figure 43 and Figure 44 In some embodiments, the first fiber C111 is a continuous fiber, and at least some of the multiple first fibers C111 intersect each other; and / or, the second fiber C211 is a continuous fiber, and at least some of the multiple second fibers C211 intersect each other.

[0837] In this embodiment, the fiber is a connecting fiber, meaning that the fiber can extend to both opposite ends of the fiber fabric. Correspondingly, the first fiber C111 can extend to both opposite ends of the first fiber fabric C11; the second fiber C211 can extend to both opposite ends of the second fiber fabric C21.

[0838] In this embodiment of the application, the two fibers intersecting each other means that the two fibers extend in different directions (which can also be understood as the length direction of the fibers). The extension directions of the two fibers can be at right angle, acute angle or obtuse angle.

[0839] In this embodiment, at least some of the first fibers C111 intersect each other, as shown in the reference. Figure 43 It can be that in the same first fiber fabric C11, there are at least two intersecting first fibers C111, and the intersection of the two first fibers C111 can be a plain weave, twill weave, or satin weave, etc.; or, refer to Figure 44 In different first fiber fabrics C11, there are at least two intersecting first fibers C111.

[0840] In some examples, the first covering 123 includes one or more first fiber fabrics C11, each first fiber fabric C11 including at least two intersecting first fibers C111; in other examples, the first covering 123 includes two or more first fiber fabrics C11, multiple first fibers C111 in the same first fiber fabric C11 are arranged in parallel, and the first fibers C111 in at least two first fiber fabrics C11 are intersecting.

[0841] In this embodiment, at least some of the second fibers C211 intersect each other, as shown in the reference. Figure 43 It can be that in the same second fiber fabric C21, there are at least two intersecting second fibers C211, and the intersection of the two second fibers C211 can be a plain weave, twill weave, or satin weave, etc.; or, refer to Figure 44 In different second fiber fabrics C21, there are at least two intersecting second fibers C211.

[0842] In some examples, the second cover 124 includes one or more layers of second fiber fabric C21, each layer of second fiber fabric C21 including at least two intersecting second fibers C211; in other examples, the second cover 124 includes two or more layers of second fiber fabric C21, multiple second fibers C211 in the same second fiber fabric C21 are arranged in parallel, and the second fibers C211 in at least two second fiber fabrics C21 are intersecting.

[0843] In the technical solution of this application embodiment, the continuously arranged first fiber C111 and second fiber C211 have better structural integrity, so as to provide better structural strength for the first covering layer 123 or the second covering layer 124. The cross-arranged first fiber C111 and second fiber C211 can improve the structural strength of the first fiber fabric C11 / second fiber C211 woven fabric, provide load-bearing capacity in multiple directions, and also reduce the possibility of the first fiber fabric C11 / second fiber C211 woven fabric being torn.

[0844] Reference Figure 43 and Figure 44In some embodiments, the first coating 123 includes a first substrate C12 and a plurality of first fibers C111, wherein the first fibers C111 are continuous fibers and at least some of the plurality of first fibers C111 intersect each other; the first substrate C12 includes at least one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin; the first fibers C111 include at least one of glass fiber, basalt fiber, and aramid fiber; and / or, the second coating 124 includes a second substrate C22 and a plurality of second fibers C211, wherein the second fibers C211 are continuous fibers and at least some of the plurality of second fibers C211 intersect each other; the second substrate C22 includes at least one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin; the second fibers C211 include at least one of carbon fiber and polyethylene fiber.

[0845] In this embodiment of the application, at least some of the first fibers C111 intersect each other. This can be because there are at least two intersecting first fibers C111 in the same first fiber fabric C11; or, there are at least two intersecting first fibers C111 in different first fiber fabrics C11.

[0846] In some examples, the first covering 123 includes one or more first fiber fabrics C11, each first fiber fabric C11 including at least two intersecting first fibers C111; in other examples, the first covering 123 includes two or more first fiber fabrics C11, multiple first fibers C111 in the same first fiber fabric C11 are arranged in parallel, and the first fibers C111 in at least two first fiber fabrics C11 are intersecting.

[0847] In some examples, the first substrate C12 is one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin; in other examples, the first substrate C12 is composed of two or more of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin.

[0848] In some examples, the first fiber C111 is either carbon fiber or polyethylene fiber; in other examples, the first fiber C111 is a composite of carbon fiber and polyethylene fiber.

[0849] In some examples, the first substrate C12 includes polyurethane, and the first fiber C111 includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric C11, which is composed of polyurethane and the first fiber C111, has advantages such as high elasticity, abrasion resistance and high tear strength.

[0850] In some examples, the first substrate C12 includes epoxy resin, and the first fiber C111 includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric C11, which is composed of epoxy resin and first fiber C111, has advantages such as good adhesion, high mechanical strength and strong corrosion resistance.

[0851] In some examples, the first substrate C12 includes phenolic resin, and the first fiber C111 includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric C11, which is composed of phenolic resin and first fiber C111, has advantages such as good heat resistance and good flame retardancy.

[0852] In some examples, the first substrate C12 includes polyamide resin, and the first fiber C111 includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric C11, which is composed of polyamide resin and first fiber C111, has advantages such as high strength, good wear resistance, and good oil resistance.

[0853] In some examples, the first substrate C12 includes a ceramizable resin, and the first fiber C111 includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric C11, which is composed of the ceramizable resin and the first fiber C111, has advantages such as good structural stability, high temperature resistance, and good flame retardancy.

[0854] In some examples, the first fiber C111 includes carbon fiber, and the first substrate C12 includes polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin. The first fiber fabric C11, which is composed of carbon fiber and the first substrate C12, has advantages such as high strength, low density, corrosion resistance, and good thermal stability.

[0855] In some examples, the first fiber C111 includes polyethylene fiber, and the first substrate C12 includes polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin. The first fiber fabric C11, which is composed of polyethylene fiber and the first substrate C12, has advantages such as high strength and toughness, low density, and ease of processing.

[0856] In this embodiment of the application, at least some of the second fibers C211 intersect each other. This can be because there are at least two intersecting second fibers C211 in the same second fiber fabric C21, or at least two intersecting second fibers C211 in different second fiber fabrics C21.

[0857] In some examples, the second cover 124 includes one or more layers of second fiber fabric C21, each layer of second fiber fabric C21 including at least two intersecting second fibers C211; in other examples, the second cover 124 includes two or more layers of second fiber fabric C21, multiple second fibers C211 in the same second fiber fabric C21 are arranged in parallel, and the second fibers C211 in at least two second fiber fabrics C21 are intersecting.

[0858] In some examples, the second substrate C22 is one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin; in other examples, the second substrate C22 is composed of two or more of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin.

[0859] In some examples, the second fiber C211 is one of glass fiber, basalt fiber, and aramid fiber; in other examples, the second fiber C211 is composed of two or more of glass fiber, basalt fiber, and aramid fiber.

[0860] In some examples, the second substrate C22 includes polyurethane, and the second fiber C211 includes one or more of glass fiber, basalt fiber, and aramid fiber. The second fiber C211 prepreg composed of polyurethane and the second fiber C211 has advantages such as high elasticity, abrasion resistance and high tear strength.

[0861] In some examples, the second substrate C22 includes epoxy resin, and the second fiber C211 includes one or more of glass fiber, basalt fiber, and aramid fiber. The second fiber C211 prepreg composed of epoxy resin and second fiber C211 has advantages such as good adhesion, high mechanical strength, and strong corrosion resistance.

[0862] In some examples, the second substrate C22 includes phenolic resin, and the second fiber C211 includes one or more of glass fiber, basalt fiber, and aramid fiber. The second fiber C211 prepreg composed of phenolic resin and second fiber C211 has advantages such as good heat resistance and good flame retardancy.

[0863] In some examples, the second substrate C22 includes polyamide resin, and the second fiber C211 includes one or more of glass fiber, basalt fiber, and aramid fiber. The second fiber C211 prepreg composed of polyamide resin and second fiber C211 has advantages such as high strength, good wear resistance, and good oil resistance.

[0864] In some examples, the second substrate C22 includes a ceramizable resin, and the second fiber C211 includes one or more of glass fiber, basalt fiber, and aramid fiber. The second fiber C211 prepreg, which is composed of the ceramizable resin and the second fiber C211, has advantages such as good structural stability, high temperature resistance, and good flame retardancy.

[0865] In some examples, the second fiber C211 includes glass fiber, and the second substrate C22 includes polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin. The second fiber C211 prepreg, which is composed of glass fiber and the second substrate C22, has advantages such as high strength, light weight, good insulation, and corrosion resistance.

[0866] In some examples, the second fiber C211 includes basalt fiber, and the second substrate C22 includes polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin. The second fiber C211 prepreg, which is composed of basalt fiber and second substrate C22, has advantages such as good mechanical properties, good fire resistance and flame retardancy, strong insulation and electromagnetic shielding capabilities, and corrosion resistance.

[0867] In some examples, the second fiber C211 includes aramid fiber, and the second substrate C22 includes polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin. The second fiber C211 prepreg composed of aramid fiber and second substrate C22 has advantages such as high strength, low density, impact resistance, good insulation, high temperature resistance, and easy processing.

[0868] The technical solutions of this application embodiment use polyurethane, epoxy resin, phenolic resin, polyamide resin, ceramicizable resin, etc. as the first substrate C12, which has good wear resistance, high toughness, adhesion, corrosion resistance, and heat resistance. Using carbon fiber, polyethylene fiber, etc. as the second fiber C211 can reduce weight and provide higher strength. Using polyurethane, epoxy resin, phenolic resin, polyamide resin, ceramicizable resin, etc. as the second substrate C22, which has good wear resistance, high toughness, adhesion, corrosion resistance, and heat resistance, and using glass fiber, basalt fiber, aramid fiber, etc. as the first fiber C111, can obtain good structural strength and insulation properties.

[0869] In the technical solution of this application embodiment, the first covering layer 123 includes a first substrate C12 and a first fiber C111, and the second covering layer 124 includes a second substrate C22 and a second fiber C211. The first covering layer 123 made of the first fiber C111 has good insulation properties; the second covering layer 124 made of the second fiber C211 has the advantages of high support strength and lightweight. The combination of the two can facilitate the enclosure 1 to have both lightweight and protective performance.

[0870] In some embodiments, the thickness H1 of the first coating 123 is less than or equal to the thickness H2 of the second coating 124; and / or, the thickness H1 of the first coating 123 is in the range of 0.1 mm to 1.0 mm, and the thickness H2 of the second coating 124 is in the range of 1.0 mm to 2.5 mm.

[0871] In this embodiment, the thickness H1 of the first covering 123 is its dimension along its own thickness direction. The thickness directions of the first covering 123 at different positions of the housing 1 can be the same or different. For example, the thickness H1 of the first covering 123 provided on the third wall 120 is the dimension along the thickness direction of the third wall 120; the thickness H1 of the first covering 123 provided on the inner or outer side of the sidewall is the dimension in the thickness direction of the sidewall (third direction R2 or second direction R3).

[0872] In this embodiment, the thickness H1 of the first covering layer 123 is relatively large, which can provide better protective performance; the thickness H1 of the first covering layer 123 is relatively small, which helps to reduce the weight of the housing 1.

[0873] In some examples, the thickness H1 of the first coating 123 ranges from 0.1 mm to 1.0 mm. For example, the thickness H1 of the first coating 123 is 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, 1.0 mm, etc.

[0874] In this embodiment, the thickness H2 of the second covering 124 is its dimension along its own thickness direction. The thickness directions of the second covering 124 at different positions of the housing 1 can be the same or different. For example, the thickness H2 of the second covering 124 provided on the third wall 120 is the dimension along the thickness direction of the third wall 120. The thickness H2 of the second covering 124 provided on the inner or outer side of the side wall is the dimension in the thickness direction of the side wall.

[0875] In this embodiment, the thickness H2 of the second cladding 124 is relatively large, which can provide better support performance and resistance to deformation; the thickness H2 of the second cladding 124 is relatively small, which helps to reduce the weight of the housing 1.

[0876] In some examples, the thickness H2 of the second coating 124 ranges from 1.0 mm to 2.5 mm. For example, the thickness H2 of the second coating 124 is 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, etc.

[0877] In some examples, the thickness H1 of the first coating 123 is less than the thickness H2 of the second coating 124, for example, the thickness H1 of the first coating 123 is 0.5 mm and the thickness H2 of the second coating 124 is 1.0 mm; in other examples, the thickness H1 of the first coating 123 is equal to the thickness H2 of the second coating 124, for example, the thickness H1 of the first coating 123 and the thickness H2 of the second coating 124 are both 1.0 mm.

[0878] In the technical solution of this application embodiment, the thinner first coating 123 helps to reduce the wall thickness of the housing 1 and reduce the weight of the housing 1 while meeting the insulation requirements; the thicker second coating 124 helps to improve the structural strength so as to provide a more stable working environment for the battery cell 210.

[0879] Reference Figures 45-49 In some embodiments, there are multiple battery cell assemblies, and each battery cell assembly contains multiple battery cells 210. The multiple battery cells 210 in each battery cell assembly are arranged along a third direction. The housing 1 also includes multiple side walls. The third wall 120 and the multiple side walls define a receiving cavity 13. The side walls also include expansion beams 111 arranged opposite each other along a third direction. The battery device also includes a pull plate 5. The pull plate 5 includes a main body 610 and a connecting part 620. The connecting part 620 is connected to the main body 610 and located at both ends of the main body 610 along a third direction. The connecting part 620 is connected to the expansion beam 111.

[0880] For example, please refer to Figure 4 and Figure 8 as well as Figure 45 The covering layer 12 has a support portion 125, which is located between the expansion beam 111 and the battery cell assembly.

[0881] In this embodiment, the main body 610 can be the part that contacts the pull plate 5 with the battery cell 210 and limits the position of each battery cell 210 in the battery cell assembly. The main body 610 can contact the battery cell 210 directly or indirectly. In the battery cell assembly, multiple battery cells 210 are arranged sequentially along a third direction and connected to form an integral structure.

[0882] In this embodiment of the application, one or more surfaces of the battery cell assembly can be provided with the main body 610. The surface of the battery cell assembly can be a surface away from the third wall 120, or a surface parallel to the third direction or the second direction.

[0883] In some examples, the main body 610 is provided on the surface of the battery cell assembly facing away from the third wall 120 and on the surface of the battery cell assembly parallel to the third direction.

[0884] In this embodiment, the connecting part 620 is the part that connects the pull plate 5 to the box body 1. The connection between the connecting part 620 and the box body 1 can be welding, bonding, threaded connection, snap-fit, riveting, etc.

[0885] In this embodiment, the connecting portion 620 can be connected to one or more of the third wall 120 of the composite housing, the expansion beam 111, and the housing cover 3. In some examples, the connecting portion 620 is connected to the expansion beam 111 so that the expansion beam 111 provides good support for the pull plate 5.

[0886] In this embodiment, the connecting part 620 can be connected to the side of the expansion beam 111 near the receiving cavity 13, or it can be connected to the side of the expansion beam 111 away from the receiving cavity 13, or the connecting part 620 can be connected to both sides of the expansion beam 111 along a third direction. In some examples, the connecting part 620 is connected to the side of the expansion beam 111 away from the receiving cavity 13.

[0887] In the technical solution of this application embodiment, the battery device is provided with a pull plate 5. The pull plate 5 effectively limits the battery cell arrangement 220 through the main body 610 and the connecting part 620, which can limit the expansion of the battery cell assembly. The connecting part 620 of the pull plate 5 is connected to the expansion beam 111 so that part of the expansion force borne by the expansion beam 111 can be transmitted to the pull plate 5. In other words, the pull plate 5 can share the expansion force of the battery cell 210 with the expansion beam 111, thereby improving the modulus and strength of the housing 1, especially improving the modulus of the housing 1 along the third direction, and reducing the probability of the expansion beam 111 bending deformation and / or reducing the amount of deformation when the expansion beam 111 bends.

[0888] Reference Figures 45-49 In some embodiments, the pull plate 5 includes at least one first pull plate 630 that extends along a third direction and covers at least a portion of the battery cell assembly away from the third wall 120.

[0889] In this embodiment, the first pull plate 630 can cover the battery cell assembly from the side of the battery cell assembly away from the third wall 120. In other words, the first pull plate 630 and the third wall 120 are respectively disposed on both sides of the battery cell assembly along the first direction.

[0890] It should be noted that the first pull plate 630 covering the battery cell assembly can be a part of the battery cell assembly covered by the first pull plate 630, that is, when projected along the first direction, the projection of the first pull plate 630 overlaps with the projection of the battery cell assembly; or the first pull plate 630 covering the entire battery cell assembly, that is, when projected along the first direction, the projection of the first pull plate 630 overlaps with the projection of the battery cell assembly as a whole.

[0891] Furthermore, the first pull plate 630 can cover one or more battery cell modules, see reference. Figures 45-49 In some examples, the housing 1 is provided with multiple battery cell assemblies forming a battery cell array, and multiple adjacent battery cell assemblies in the battery cell array share a first pull plate 630. Alternatively, refer to... Figure 46 In other examples, the first pull plate 630 partially or completely covers a single battery cell assembly.

[0892] In some examples, the main body 610 of the first pull plate 630 covers the battery cell assembly, and the connecting part 620 of the first pull plate 630 is disposed at both ends of the main body 610 along a third direction and is respectively connected to the corresponding expansion beam 111. The main body 610 and the connecting part 620 of the first pull plate 630 can be bent into shape by the same component.

[0893] In the technical solution of this application embodiment, the first pull plate 630 covers the battery cell assembly along the thickness direction of the third wall 120, which can provide a limit for the battery cell assembly in the thickness direction of the third wall 120 so as to fix the battery cell assembly to the housing 1. The first pull plate 630 can also resist the expansion force of the battery cell 210 along the thickness direction of the third wall 120.

[0894] Reference Figures 45-49 In some embodiments, the pull plate 5 further includes at least one second pull plate 640, which extends in a third direction and covers at least a portion of the side of the battery cell assembly.

[0895] In this embodiment, the side of the battery cell assembly can be a surface that forms an angle between the battery cell assembly and the third wall 120, such as a surface of the battery cell assembly parallel to a third direction or a second direction.

[0896] In this embodiment, the second pull plate 640 covers at least a portion of the battery cell assembly along the second direction. This can be a projection along the second direction, where the projection of the second pull plate 640 partially overlaps with the projection of the battery cell assembly; or, the projection of the second pull plate 640 completely overlaps with the projection of the battery cell assembly.

[0897] In some examples, the main body 610 of the second pull plate 640 covers the battery cell assembly, and the connecting portions 620 of the second pull plate 640 are disposed at both ends of the main body 610 along a third direction and are respectively connected to the corresponding expansion beams 111. The main body 610 and the connecting portions 620 of the second pull plate 640 can be formed by bending the same component. The connecting portions 620 of the second pull plate 640 can be the same as or different from the connecting portions 620 of the first pull plate 630.

[0898] In the technical solution of this application embodiment, the second pull plate 640 extends along a third direction and can cover at least part of the battery cell assembly, thereby bearing the expansion force of the battery cell 210 along the second direction, thereby further improving the modulus and strength of the housing 1. The second pull plate 640 is connected to the expansion beam 111, which can further improve the deformation constraint force on the expansion beam 111, thereby further improving the structural strength of the housing 1.

[0899] Reference Figures 45-49 In some embodiments, multiple battery cell assemblies are arranged along a second direction to form a battery cell array, and the second direction is intersected with a third direction; there are at least two second pull plates 640, and the second pull plates 640 cover both sides of the third direction of the battery cell array.

[0900] In this embodiment of the application, the two sides of the third direction of the battery cell array, that is, the surfaces parallel to the third direction in the battery cell array, can be understood as the two sides being the surfaces of the two outermost battery cell groups that are opposite to each other in the battery cell array, since the battery cell array includes multiple battery cell assemblies.

[0901] In some examples, the second pull plate 640 may correspond to the surface arrangement of the battery cell array. In other examples, the second pull plate 640 may correspond to the surface arrangement of the battery cell assembly, that is, the second pull plate 640 is provided on one or both surfaces of the battery cell assembly parallel to a third direction.

[0902] In the technical solution of this application embodiment, the second pull plate 640 covers the surface of the battery cell array in a third direction parallel to the battery cell array. The second pull plate 640 and the first pull plate 630 form an enclosing structure, and the two can provide limiting for the battery cell array from multiple directions in order to improve the structural strength of the housing 1.

[0903] In some embodiments, the pull plate 5 includes a fourth substrate and a fourth fiber. The fourth fiber is a continuous fiber and its extension direction is consistent with a third direction. The fourth fiber includes at least one of glass fiber, basalt fiber, and aramid fiber. The fourth substrate includes at least one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin.

[0904] In this embodiment, the pull plate 5 is made of composite material. This means that at least a portion of the structure of the pull plate 5 may be made of composite material, or the entire structure of the pull plate 5 may be made of composite material. Composite materials are lightweight and high-strength, which helps to reduce the weight of the pull plate 5 and improve its structural strength.

[0905] In some examples, the pull plate 5 includes a fourth substrate and a fourth fiber, the fourth fiber being a continuous fiber and extending along a third direction, which helps to improve the structural strength of the pull plate 5 along the third direction and enhance the pull plate 5's ability to withstand expansion forces in the third direction.

[0906] It is understandable that the pull plate 5 is in contact with the battery cell 210 and needs to have insulating properties. In some examples, the pull plate 5 and the first cladding 123 use the same or similar structure / material.

[0907] In some examples, the first covering 123 includes one or more layers of fourth fiber fabric, each layer of fourth fiber fabric including at least two intersecting fourth fibers; in other examples, the first covering 123 includes two or more layers of fourth fiber fabric, multiple fourth fibers in the same fourth fiber fabric are arranged in parallel, and fourth fibers in at least two fourth fiber fabrics are intersecting.

[0908] In some examples, the fourth substrate is one of polyurethane, epoxy resin, phenolic resin, polyamide resin, or ceramizable resin; in other examples, the fourth substrate is composed of two or more of polyurethane, epoxy resin, phenolic resin, polyamide resin, or ceramizable resin.

[0909] In some examples, the fourth fiber is either carbon fiber or polyethylene fiber; in other examples, the fourth fiber is a composite of carbon fiber and polyethylene fiber.

[0910] In some examples, the fourth substrate includes polyurethane, and the fourth fiber includes one or more of carbon fiber and polyethylene fiber. The fourth fiber fabric composed of polyurethane and the fourth fiber has advantages such as high elasticity, abrasion resistance and high tear strength.

[0911] In some examples, the fourth substrate includes epoxy resin, and the fourth fiber includes one or more of carbon fiber and polyethylene fiber. The fourth fiber fabric composed of epoxy resin and fourth fiber has advantages such as good adhesion, high mechanical strength and strong corrosion resistance.

[0912] In some examples, the fourth substrate includes phenolic resin, and the fourth fiber includes one or more of carbon fiber and polyethylene fiber. The fourth fiber fabric composed of phenolic resin and fourth fiber has advantages such as good heat resistance and good flame retardancy.

[0913] In some examples, the fourth substrate includes polyamide resin, and the fourth fiber includes one or more of carbon fiber and polyethylene fiber. The fourth fiber fabric composed of polyamide resin and fourth fiber has advantages such as high strength, good abrasion resistance, and good oil resistance.

[0914] In some examples, the fourth substrate includes a ceramizable resin, and the fourth fiber includes one or more of carbon fiber and polyethylene fiber. The fourth fiber fabric composed of the ceramizable resin and the fourth fiber has advantages such as good structural stability, high temperature resistance, and good flame retardancy.

[0915] In some examples, the fourth fiber includes carbon fiber, and the fourth substrate includes polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin. The fourth fiber fabric composed of carbon fiber and the fourth substrate has advantages such as high strength, low density, corrosion resistance, and good thermal stability.

[0916] In some examples, the fourth fiber includes polyethylene fiber, and the fourth substrate includes polyurethane, epoxy resin, phenolic resin, polyamide resin, ceramizable resin. The fourth fiber fabric composed of polyethylene fiber and the fourth substrate has advantages such as high strength and toughness, low density, and ease of processing.

[0917] The technical solution of this application embodiment has the characteristics of lightweight and high strength in the composite material formed by the fourth substrate and the fourth fiber, which is beneficial to reduce the weight of the pull plate 5 and improve the structural strength of the pull plate 5. In addition, the fourth fiber extends along the third direction, which can improve the ability of the pull plate 5 to withstand the expansion force in the third direction.

[0918] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cell assembly, including battery cells; The mounting box includes a box body, the box body includes a support body and a covering layer covering the outer surface of the support body, the covering layer is made of reinforced composite material, the covering layer surrounds a receiving cavity, and the battery cell is located in the receiving cavity; A hanger is installed on the enclosure, and the hanger is used to suspend the enclosure.

2. The battery device according to claim 1, characterized in that, The housing has a receiving hole that penetrates the support and the covering layer. The outer surface of the covering layer that coincides with the openings at both ends of the receiving hole along the axial direction of the receiving hole is a first surface. At least one of the mounters is a mounting mounting component. The mounting mounting component includes a main pad layer and a first sleeve. The receiving hole has a main pad layer at each opposite end along the axial direction of the receiving hole. The first surface at both ends is located between the two main pad layers. The first sleeve passes through the receiving hole, and the two ends of the first sleeve are respectively connected to the corresponding main pad layer.

3. The battery device according to claim 2, characterized in that, The hardness of the main pad layer is greater than or equal to 32HB, and the hardness of the first sleeve is greater than or equal to 32HB.

4. The battery device according to claim 2, characterized in that, The main pad is made of copper alloy, aluminum alloy or steel; and / or the first sleeve is made of copper alloy, aluminum alloy or steel.

5. The battery device according to any one of claims 2 to 4, characterized in that, The first sleeve includes two sub-sleeves arranged axially along the receiving hole. Each sub-sleeve is connected to the main pad layer at the corresponding end. When the mounting component is in a locked state, the two sub-sleeves abut against each other at their close ends.

6. The battery device according to claim 5, characterized in that, Each of the sub-sleeves is integrally formed with the corresponding main pad layer.

7. The battery device according to claim 5, characterized in that, The two sub-sleeves abut against each other at their close ends, and at least one end of the main pad layer is arranged at a distance from the covering layer along the axial direction of the receiving hole.

8. The battery device according to claim 7, characterized in that, The main pads at both ends are arranged at intervals from the covering layer along the axial direction of the receiving hole.

9. The battery device according to claim 8, characterized in that, The minimum distance between the main pad layer at each end and the covering layer along the axial direction of the receiving hole is a preset distance, which is less than or equal to 0.5 mm.

10. The battery device according to claim 5, characterized in that, When the mounting component is released from its locked state, the two sub-sleeves are arranged axially spaced along the receiving hole, and the main pads at both ends are in contact with the covering layer.

11. The battery device according to claim 10, characterized in that, The outer surface of the covering layer includes a second surface, which is connected to the first surfaces at both ends. The dimension of the second surface along the axial direction of the receiving hole is a first dimension. The minimum distance between the end face of the sub-sleeve away from the corresponding main pad and the corresponding main pad along the axial direction of the receiving hole is a second dimension. The minimum distance between the end face of the sub-sleeve away from the corresponding main pad and the corresponding main pad along the axial direction of the receiving hole is a third dimension. The difference between the first dimension and the second dimension and the third dimension is the gap dimension, which is less than or equal to 0.4 mm.

12. The battery device according to any one of claims 2 to 4, characterized in that, The outer surface of the first sleeve is spaced apart from the inner surface of the receiving hole, and the distance between the outer surface of the first sleeve and the inner surface of the receiving hole is less than or equal to 0.4 mm.

13. The battery device according to any one of claims 2 to 4, characterized in that, The mounting component further includes a first adhesive layer disposed between the main pad layer and the covering layer, the first adhesive layer being bonded to both the main pad layer and the covering layer.

14. The battery device according to claim 13, characterized in that, The main pad layer has a retaining edge that protrudes from the main pad layer along the axial direction of the receiving hole toward the first adhesive layer.

15. The battery device according to claim 14, characterized in that, Along the radial direction of the receiving hole, the retaining edge is located on the side of the main pad layer opposite to the receiving hole.

16. The battery device according to any one of claims 2 to 4, characterized in that, The minimum distance between the outline of the receiving hole and the outer outline of the covering layer is greater than or equal to 3 mm when projected along the axial direction of the receiving hole.

17. The battery device according to any one of claims 2 to 4, characterized in that, The mounting box also includes a cover that is placed on the box body. The wall thickness of the covering layer located on the first surface of the receiving hole facing the cover along the axial direction of the receiving hole is greater than the wall thickness of the covering layer at other locations.

18. The battery device according to any one of claims 2 to 4, characterized in that, The support includes: An expansion beam having at least one slot located on the side of the expansion beam opposite to the battery cell; Each of the slots is provided with a cover, at least one of the covers is a lifting cover, the shell wall of the lifting cover includes a lifting side wall, the lifting side wall is located on the side of the cover facing away from the receiving hole along the radial direction of the receiving hole, the lifting side wall forms a lifting hole, the thickness of the lifting side wall is greater than the thickness of the shell walls of all the covers except the lifting side wall, the receiving hole penetrates the cover and the expansion beam, and the axial direction of the receiving hole is arranged intersecting the axial direction of the lifting hole.

19. The battery device according to claim 18, characterized in that, At least one of the slots is a lifting slot, the lifting cover is located within the lifting slot, and the expansion beam includes: Main support, wherein the slot is formed on the side of the main support opposite to the battery cell; An end plate is connected to the side of the main support away from the battery cell. The end plate is provided at both ends of the receiving hole along the axial direction of the receiving hole, and the receiving hole penetrates at least through both ends of the end plate. A support plate is connected between the end plates at both ends, and the support plate, the main support, and the end plates at both ends form the hoisting groove.

20. The battery device according to claim 19, characterized in that, The support plate, the main support, and the end plates at both ends are further configured to form a slot located on the side of the support plate opposite to the hoisting groove, and the receiving hole also penetrates the support plate.

21. The battery device according to any one of claims 1 to 4, characterized in that, The support is made of foamed material or reinforced composite material.

22. The battery device according to any one of claims 2 to 4, characterized in that, The coating layer includes: A first covering layer surrounds the receiving cavity, and the material of the first covering layer is an insulating reinforced composite material; The second cover layer, the support body is located in the space enclosed by the first cover layer and the second cover layer, the material of the second cover layer is a reinforced composite material, the density of the second cover layer is less than the density of the first cover layer, and the receiving hole penetrates the support body and the second cover layer.

23. The battery device according to any one of claims 2 to 4, characterized in that, The hardness of the main pad layer and the hardness of the first sleeve are both greater than the hardness of the covering layer.

24. The battery device according to any one of claims 1 to 4, characterized in that, The mounting box further includes a cover over the box body, the box body and the cover are arranged in a first direction, the box body also includes a base, the base is connected to the support body along the first direction towards the cover, the surface of the base along the first direction towards the cover is at least partially exposed on the support body, the base is made of metal, and the battery device further includes a preset connector, the preset connector is installed on the base along the first direction towards the cover.

25. The battery device according to claim 24, characterized in that, The base includes: Mounting plate with mounting holes; The second sleeve is installed on the mounting plate, the second sleeve passes through the mounting hole, the second sleeve protrudes from the mounting plate on the side opposite to the box cover along the axial direction of the mounting hole, the second sleeve has an internal thread, the preset connector is threadedly connected to the internal thread of the second sleeve, the second sleeve and / or the mounting plate are connected to the support body, and the surface of the mounting plate facing the box cover along the first direction and / or the surface of the second sleeve facing the box cover along the first direction are at least partially exposed on the support body.

26. The battery device according to claim 25, characterized in that, The second sleeve includes: A cylindrical body is connected to the mounting plate, and the cylindrical body passes through the mounting hole; The threaded sleeve is threaded to the cylinder and has an internal thread that is threaded to the preset connector.

27. The battery device according to claim 25, characterized in that, The thickness of the mounting plate is 1mm to 5mm.

28. The battery device according to claim 27, characterized in that, The thickness of the mounting plate is 2mm to 3mm.

29. The battery device according to claim 24, characterized in that, At least one of the bases is a first base, and a pre-set connector connected to the first base is a first connector. The support body has a side beam for supporting the box cover. The first base and the side beam are connected to one side of the box cover along the first direction. The first connector passes through the box cover so that the box cover is installed on the box body.

30. The battery device according to claim 29, characterized in that, The first base is annular in shape and surrounds the housing body circumferentially along the receiving cavity.

31. The battery device according to claim 30, characterized in that, The first base is in the shape of a closed ring.

32. The battery device according to claim 24, characterized in that, At least one of the bases is a second base, and a pre-set connector connected to the second base is a second connector. The support has an expansion beam. The second base is connected to the expansion beam along a first direction toward the box cover. The expansion beams are provided on opposite sides of the battery cell assembly to withstand the expansion force of the battery cell. The battery device also includes a pull plate spanning the expansion beams on both sides. The pull plate has the second connector at both ends along the arrangement direction of the expansion beams on both sides. The second connector at each end passes through the corresponding pull plate so that the pull plate is installed in the box at the position corresponding to the expansion beam.

33. The battery device according to claim 24, characterized in that, The surface of the base facing the lid along the first direction is adhered to the covering layer.

34. The battery device according to any one of claims 1 to 4, characterized in that, The mounting box further includes a cover over the box body, and the box body also includes a preset support. At least one of the mounters is a hanging device. The preset support is located on the side of the covering layer facing the support body. The preset support is connected to the support body. The preset support is laid on the side of the receiving cavity away from the box cover to support the battery cell assembly. The hanging device has a mounting hole for hanging the box body. The hanging device includes a mounting member. The mounting member is connected to the preset support so that the load borne by the mounting hole is transmitted to the preset support through the mounting member.

35. The battery device according to claim 34, characterized in that, The arrangement direction of the box body and the box cover is a first direction, at least one of the mounting members is a first mounting member, the first mounting member and the receiving cavity are arranged along a second direction, the second direction and the first direction are arranged intersecting, the preset support is connected to the first mounting member on both sides along the second direction, and the first mounting member has the mounting hole.

36. The battery device according to claim 35, characterized in that, The support has expansion beams, and the battery cell assembly has expansion beams on opposite sides along a third direction, the third direction being arranged to intersect the first direction and the second direction respectively.

37. The battery device according to claim 35, characterized in that, The first mounting member has locking surfaces on opposite sides along the axial direction of the mounting hole, and the projection area of ​​the locking surfaces along the axial direction of the mounting hole is offset from the projection area of ​​the covering layer along the axial direction of the mounting hole.

38. The battery device according to claim 34, characterized in that, The arrangement direction of the box body and the box cover is a first direction. At least one of the mounting members is a second mounting member. The second mounting member and the receiving cavity are arranged along a third direction. The third direction intersects with the first direction. The preset support is connected to the second mounting member on at least one side along the third direction. The hanging device also includes a hanging bracket. The hanging bracket is installed on the side of the covering layer away from the second mounting member. The projection area of ​​the hanging bracket along the third direction and the projection area of ​​the second mounting member along the third direction at least partially overlap. The hanging bracket forms the mounting hole.

39. The battery device according to claim 38, characterized in that, The battery device further includes an assembly connector that passes through the hanging bracket, the covering layer, and the second mounting member to install the hanging bracket onto the covering layer at the position corresponding to the second mounting member.

40. The battery device according to claim 38, characterized in that, The second mounting component includes: The mounting body has two opposite surfaces along the third direction as target surfaces, and both target surfaces are in contact with the covering layer. The transition member is connected to the mounting body and the preset support respectively. The surface of the transition member away from the receiving cavity along the third direction contacts the covering layer. The surface of the transition member facing the receiving cavity along the third direction is at least partially spaced from the covering layer.

41. The battery device according to claim 40, characterized in that, The transition member extends along the third direction from one side of the target surface of the mounting body to the other side of the target surface; or, the hanging bracket is located on the side of the mounting body away from the receiving cavity along the third direction, and the transition member is located on the side of the mounting body away from the receiving cavity along the third direction.

42. The battery device according to claim 34, characterized in that, The preset support is plate-shaped, and grooves are formed on both sides of the preset support along the arrangement direction of the box body and the box cover. There are at least two grooves, and the at least two grooves are arranged in sequence. The grooves on both sides are arranged alternately along the arrangement direction of the at least two grooves.

43. The battery device according to claim 34, characterized in that, The materials of the hanging device and the preset support are both metal, and / or the material of the support body is foam material.

44. The battery device according to claim 43, characterized in that, The hanging device is made of steel or aluminum, and / or the preset support is made of steel or aluminum.

45. The battery device according to claim 34, characterized in that, The stiffness of the preset support is greater than the stiffness of the support body, and the strength of the preset support is greater than the strength of the support body.

46. ​​An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1 to 45, the battery device being used to store or provide electrical energy.

47. The electrical appliance according to claim 46, characterized in that, The electrical equipment includes aircraft.

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