Battery device, energy storage device and power utilization device

Abstract

The embodiment of the utility model provides a battery device, an energy storage device and a power utilization device. The battery device comprises a box body assembly, a battery monomer assembly and a supporting assembly, a containing cavity is formed in the box body assembly. And the battery monomer assembly is arranged in the accommodating cavity. The supporting assembly is arranged in the containing cavity and extends in the first direction, and a cavity is formed in the supporting assembly. And the supporting assembly is positioned on at least one side of the battery monomer assembly along the second direction and is positioned between the battery monomer assembly and the box body assembly. At least part of the supporting assembly comprises continuous fibers and a base body, the base body is attached to the continuous fibers, and the extending direction of the continuous fibers is the first direction. The first direction intersects with the second direction, and the first direction is the front-back direction of the battery device. According to the battery device provided by the embodiment of the invention, the connection strength of the mounting structure can be improved to a certain extent, and the stability and reliability of the battery device are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device, an energy storage device, and an electrical device. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] In new energy vehicles equipped with battery systems, these systems can provide full or partial propulsion. The housing assembly is a crucial component of the battery system, housing and protecting the internal battery cells. In the development of battery systems, in addition to improving their performance, enhancing their compression and collision resistance is also a critical issue. Utility Model Content

[0004] In view of this, embodiments of the present application hope to provide a battery device, an energy storage device, and an electrical device that can improve the anti-extrusion performance and anti-collision performance of the battery device.

[0005] To this end, a first aspect of an embodiment of the present application provides a battery device, including:

[0006] A box assembly, wherein the box assembly has a receiving cavity inside;

[0007] a battery cell assembly, wherein the battery cell assembly is disposed in the accommodating cavity;

[0008] A support assembly, wherein the support assembly is arranged in the accommodating cavity, the support assembly extends along a first direction, and has a cavity inside the support assembly; the support assembly is located on at least one side of the battery cell assembly along a second direction, and is located between the battery cell assembly and the box assembly; at least a portion of the support assembly includes continuous fibers and a matrix, the matrix is ​​attached to the continuous fibers, and the extension direction of the continuous fibers is the first direction; wherein the first direction intersects with the second direction, and the first direction is the front-to-back direction of the battery device.

[0009] The battery device provided in an embodiment of the present application includes a housing assembly, a battery cell assembly, and a support assembly. The battery cell assembly is disposed within the housing cavity of the housing assembly, and the housing assembly protects the battery cell assembly. Furthermore, by disposing a support assembly on at least one side of the battery cell assembly along the second direction, the support assembly is located between the battery cell assembly and the housing assembly. That is, when subjected to side extrusion and side collision, the support assembly can disperse the local impact force on the battery device. This helps disperse the force applied to the battery device, i.e., reduces the local pressure on the battery device, thereby improving the battery device's anti-extrusion and anti-collision performance to a certain extent, thereby improving the battery device's reliability. Furthermore, by providing a cavity within the support assembly, while reducing the weight of the support assembly, it also helps provide a certain buffer space for the support assembly, further improving the battery device's anti-extrusion and anti-collision performance.

[0010] Furthermore, by configuring at least a portion of the support assembly to comprise continuous fibers and a matrix, with the matrix attached to the continuous fibers, the support member can be a composite plate, resulting in low density, light weight, and high strength. This reduces the weight of the support member, thereby reducing the weight of the battery device, while also improving its structural strength. Furthermore, by configuring the continuous fibers to extend in a first direction, i.e., the front-to-back direction of the battery device, the support member's resistance to extrusion and collision is further enhanced.

[0011] In some embodiments, the support assembly includes a support member, the support member extends along the first direction, the support member has the cavity inside, and the support member includes the continuous fiber and the matrix;

[0012] The support member has a first side wall and a second side wall arranged opposite to each other along the second direction, the first side wall is used to support and cooperate with the battery monomer assembly, and the second side wall is used to support and cooperate with the box assembly.

[0013] In this embodiment, the support member is provided with a first side wall and a second side wall opposite to each other along the second direction to respectively support and cooperate with the battery cell assembly and the box assembly, so that when subjected to side extrusion and side collision, the support assembly can disperse the local impact force on the battery device.

[0014] In some embodiments, the support member has a third side wall and a fourth side wall arranged opposite to each other along the height direction of the battery device, and the first side wall, the third side wall, the second side wall and the fourth side wall are connected end to end and surround to form the cavity.

[0015] That is to say, in the cross section perpendicular to the extension direction of the support member, the cross section of the support member is roughly polygonal, which is beneficial to improving the supporting stability of the support member.

[0016] In some embodiments, a dimension of the first sidewall in a height direction of the battery device is greater than a dimension of the second sidewall in the height direction of the battery device.

[0017] In this way, on the one hand, by increasing the size of the first side wall in the height direction of the battery device, it is beneficial to increase the contact area between the first side wall and the battery cell assembly, which can disperse the local impact force on the battery cell. This is beneficial to disperse the force on the battery cell, that is, reduce the local pressure of the battery cell, and further improve the anti-extrusion performance and anti-collision performance of the battery device; on the other hand, by setting the size of the second side wall in the height direction of the battery device to be smaller than the size of the first side wall in the height direction of the battery device, it is beneficial to reduce the space occupied by the support and can have an avoidance effect on the box assembly.

[0018] In some embodiments, the support member includes a support body and reinforcing ribs, the support body has the cavity inside, and the reinforcing ribs are arranged in the cavity and divide the cavity into a plurality of sub-cavities.

[0019] In this embodiment, by configuring the support member to include a support body and reinforcing ribs, and arranging the reinforcing ribs in the cavity, the reinforcing ribs can support the support body, thereby improving the structural strength of the support member and further improving the extrusion resistance and collision resistance of the battery device.

[0020] In some embodiments, on a cross section perpendicular to the first direction, an extension direction of the reinforcing rib intersects with a height direction of the battery device.

[0021] In this embodiment, by setting the extension direction of the reinforcing rib to intersect with the height direction of the battery device, the structural strength of the reinforcing rib to the supporting body in the second direction is improved, thereby further improving the anti-extrusion performance and anti-collision performance of the battery device.

[0022] In some embodiments, the support assembly further includes a filling member; the filling member is disposed between the support assembly and the battery cell assembly.

[0023] That is, the filling member is disposed between the support member and the battery cell assembly, and can fill the gap between the support member and the battery cell assembly.

[0024] In some embodiments, the filling member is disposed between the support member and the box assembly.

[0025] The filling piece is arranged between the support piece and the box assembly and can fill the gap between the support piece and the box assembly.

[0026] In this embodiment, the support assembly improves the shaking of the support member in the box assembly by providing a filler, and providing the filler between the support member and the battery cell assembly, and / or providing the filler between the support member and the box assembly, thereby improving the support effect of the support assembly, and further improving the extrusion resistance and collision resistance of the battery device. In other words, the assembly tolerance can be absorbed by the filler, which is conducive to improving the versatility of the support assembly, that is, the support assembly can be applicable to different types of battery devices, thereby reducing costs.

[0027] In some embodiments, the filling member includes at least one of a buffer member and an adhesive layer.

[0028] In the embodiment where the filling member comprises a buffer member, the filling member can absorb assembly tolerances and also play a buffering role.

[0029] Exemplarily, the buffer member is, for example, foam.

[0030] In the embodiment where the filling member includes an adhesive layer, the filling member can absorb assembly tolerances and also play a bonding role, which is beneficial to improving connection stability and facilitating production and manufacturing.

[0031] In some embodiments, the box assembly includes a box body and a reinforcement member, and the support assembly is located between the battery cell assembly and the reinforcement member.

[0032] In this embodiment, the box assembly is configured to include a box body and a reinforcement, which not only improves the structural strength of the box assembly through the reinforcement, but also facilitates the assembly of the support assembly by positioning the support assembly between the battery cell assembly and the reinforcement.

[0033] In some embodiments, the box assembly includes a plate-shaped structural member formed by extrusion or stamping, and the support assembly is located between the battery cell assembly and the plate-shaped structural member.

[0034] The box assembly of the embodiment of the present application is configured to include a plate-like structural member formed by extrusion or stamping, and the support assembly is located between the battery cell assembly and the plate-like structural member. This structure not only reduces the weight of the box assembly and reduces costs, but also helps to improve the anti-extrusion and anti-collision performance of the battery device, thereby improving the reliability of the battery device.

[0035] In some embodiments, the support assembly further includes a biaxial cloth, and the biaxial cloth is disposed on the surface of the support member.

[0036] In this embodiment, by arranging the biaxial cloth on the surface of the support member, the structural strength of the support member in a direction perpendicular to the first direction is improved.

[0037] In some embodiments, the support assembly further includes a triaxial cloth, and the triaxial cloth is arranged on the surface of the support member.

[0038] In this embodiment, by arranging the biaxial cloth on the surface of the support member, the structural strength of the support member in a direction perpendicular to the first direction is improved.

[0039] A second aspect of an embodiment of the present application provides an energy storage device, comprising a plurality of the battery devices described above, wherein the battery devices are used to store or provide electrical energy.

[0040] The battery device of the energy storage device provided in the embodiment of the present application includes a case assembly, a battery cell assembly, and a support assembly. The battery cell assembly is arranged in the accommodating cavity of the case assembly, and the case assembly protects the battery cell assembly. In addition, by arranging a support assembly on at least one side of the battery cell assembly along the second direction, the support assembly is located between the battery cell assembly and the case assembly. That is, when subjected to side extrusion and side collision, the support assembly can disperse the local impact force on the battery device. This is conducive to dispersing the force on the battery device, that is, reducing the local pressure on the battery device, thereby improving the anti-extrusion performance and anti-collision performance of the battery device to a certain extent, and thus improving the reliability of the battery device. In addition, by arranging a cavity inside the support assembly, while reducing the weight of the support assembly, it is also conducive to providing a certain buffer space for the support assembly, further improving the anti-extrusion performance and anti-collision performance of the battery device.

[0041] Furthermore, by configuring at least a portion of the support assembly to comprise continuous fibers and a matrix, with the matrix attached to the continuous fibers, the support member can be a composite plate, resulting in low density, light weight, and high strength. This reduces the weight of the support member, thereby reducing the weight of the battery device, while also improving its structural strength. Furthermore, by configuring the continuous fibers to extend in a first direction, i.e., the front-to-back direction of the battery device, the support member's resistance to extrusion and collision is further enhanced.

[0042] A third aspect of an embodiment of the present application provides an electrical device, comprising the battery device described above or the energy storage device described above, wherein the battery device is used to store or provide electrical energy.

[0043] The battery device of an electrical device provided in an embodiment of the present application includes a case assembly, a battery cell assembly, and a support assembly. The battery cell assembly is disposed within the accommodating cavity of the case assembly, and the case assembly protects the battery cell assembly. In addition, by disposing a support assembly on at least one side of the battery cell assembly along the second direction, the support assembly is located between the battery cell assembly and the case assembly. That is, when subjected to side extrusion and side collision, the support assembly can disperse the local impact force on the battery device. This is conducive to dispersing the force on the battery device, that is, reducing the local pressure on the battery device, thereby to a certain extent improving the anti-extrusion performance and anti-collision performance of the battery device, and thus improving the reliability of the battery device. In addition, by providing a cavity inside the support assembly, while reducing the weight of the support assembly, it is also conducive to providing a certain buffer space for the support assembly, further improving the anti-extrusion performance and anti-collision performance of the battery device.

[0044] Furthermore, by configuring at least a portion of the support assembly to comprise continuous fibers and a matrix, with the matrix attached to the continuous fibers, the support member can be a composite plate, resulting in low density, light weight, and high strength. This reduces the weight of the support member, thereby reducing the weight of the battery device, while also improving its structural strength. Furthermore, by configuring the continuous fibers to extend in a first direction, i.e., the front-to-back direction of the battery device, the support member's resistance to extrusion and collision is further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic structural diagram of a vehicle provided in one embodiment of the present application;

[0046] Figure 2 The schematic structural diagram of the box assembly provided in one embodiment of the present application omits the top cover;

[0047] Figure 3 for Figure 2 A top view of

[0048] Figure 4 for Figure 3 Cross-sectional view in the AA direction;

[0049] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0050] Figure 6 A schematic structural diagram of a support member provided in one embodiment of the present application.

[0051] Description of Reference Numerals

[0052] 10. Battery cell assembly; 11. Battery cell; 20. Box assembly; 21. Box body; 211. Second box; 22. Reinforcement member; 30. Support assembly; 31. Support member; 311. Cavity; 312. First side wall; 313. Second side wall; 314. Third side wall; 315. Fourth side wall; 316. Reinforcement rib; 32. Filler; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. DETAILED DESCRIPTION

[0053] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0054] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0055] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting this application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0056] It should also be noted that, in the description of this application, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0057] With the development of clean energy, more and more devices are using electricity as a driving force. Consequently, power batteries, such as lithium-ion batteries, that can store large amounts of electricity and undergo multiple charge and discharge cycles are rapidly developing. These batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields.

[0058] An embodiment of the present application provides an electrical device, including a battery device according to any embodiment of the present application or an energy storage device according to any embodiment of the present application, wherein the battery device is used to store or provide electrical energy.

[0059] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0060] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0061] Please refer to Figure 1 , a controller 200, a motor 300 and a battery device 100 may be provided inside the vehicle 1000, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, the battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but may also be used as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0062] An embodiment of the present application provides an energy storage device, comprising a plurality of battery devices 100 according to any embodiment of the present application, wherein the battery devices 100 are used to store or provide electrical energy.

[0063] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it at the appropriate time. For example, an energy storage device can store electrical energy during periods of low electricity consumption and provide it to relevant users or electrical equipment during periods of peak electricity consumption. The energy storage system provided in the embodiments of the present application can be any power system that requires an energy storage device.

[0064] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0065] See also Figure 2 , an embodiment of the present application provides a battery device 100, which includes a case assembly 20, a battery cell assembly 10 and a support assembly 30. The case assembly 20 has a accommodating cavity inside. The battery cell assembly 10 is arranged in the accommodating cavity. The support assembly 30 is arranged in the accommodating cavity, and the support assembly 30 extends along the first direction. The support assembly 30 has a cavity 311 inside. The support assembly 30 is located on at least one side of the battery cell assembly 10 along the second direction, and is located between the battery cell assembly 10 and the case assembly 20. At least a portion of the support assembly 30 includes continuous fibers and a matrix, the matrix is ​​attached to the continuous fibers, and the extension direction of the continuous fibers is the first direction. The first direction intersects with the second direction, and the first direction is the front-to-back direction of the battery device 100.

[0066] The battery apparatus 100 mentioned in the embodiments of the present application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or hybrid via a busbar.

[0067] In the embodiment of the present application, the battery cell 11 may be a secondary battery. A secondary battery refers to a battery cell 11 that can be continuously used by activating active materials by charging after the battery cell 11 is discharged.

[0068] The battery cell 11 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiment of the present application.

[0069] A battery cell 11 typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charge and discharge process of the battery cell 11, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing the active ions to pass through.

[0070] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0071] In some embodiments, a battery cell assembly 10 is generally formed by arranging a plurality of battery cells 11 .

[0072] As an example, the battery cell assembly 10 may be a battery module, which is formed by arranging and fixing a plurality of battery cells 11 to form an independent module. As an example, the battery module may be formed by bundling the plurality of battery cells 11 with a cable tie.

[0073] In some embodiments, the battery device 100 may be a battery pack, which includes a case assembly 20 and one or more battery cell assemblies 10 . The battery cell assembly 10 is housed in the case assembly 20 .

[0074] As an example, the battery cell assembly 10 may be a battery module, and the battery cell assembly 10 may be accommodated in the box assembly 20 by fixing the battery module in the box assembly 20 .

[0075] As an example, the battery cell assembly 10 may also be housed in the box assembly 20 by directly fixing the plurality of battery cells 11 to the box assembly 20 .

[0076] As an example, see Figure 2 The box assembly 20 may include a box body 21, which may include a first box body (not shown) and a second box body 211. The first box body and the second box body 211 engage to form a closed chamber within the box assembly 20 for accommodating the battery cell assembly 10. "Enclosed" here means covered or closed, and may be sealed or unsealed. The first box body may be a top cover or a bottom plate.

[0077] As an example, the box assembly 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed receiving cavity is formed inside the box assembly 20 to accommodate the battery cell assembly 10.

[0078] In some embodiments, the box assembly 20 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the box assembly 20 may form at least a portion of the floor of the vehicle 1000, or a portion of the box assembly 20 may form at least a portion of a cross member or a longitudinal member of the vehicle 1000.

[0079] See also Figure 3 The support assembly 30 extends along a first direction, which is the front-to-back direction of the battery device 100 . That is, the support assembly 30 extends along the front-to-back direction of the battery device 100 .

[0080] The support assembly 30 is located on at least one side of the battery cell assembly 10 along the second direction. The support assembly 30 may be provided on one side of the battery cell assembly 10 along the second direction, or on both sides of the battery cell assembly 10 along the second direction.

[0081] Here, the first direction intersecting the second direction means that the first direction and the second direction are not parallel. For example, the first direction and the second direction are perpendicular to each other.

[0082] For example, the first direction is the front-to-back direction of the battery device 100, and the second direction is the left-to-right direction of the battery device 100. Figure 3 and Figure 4 As shown, the first direction is represented by X, the second direction is represented by Y, and the height direction of the battery device 100 is represented by Z.

[0083] See also Figure 3 and Figure 4 The support assembly 30 is located between the battery cell assembly 10 and the box assembly 20. That is, when the battery device 100 is subjected to side extrusion and side collision, the support assembly 30 can disperse the local impact force on the battery device 100. This is conducive to dispersing the force on the battery device 100, that is, reducing the local pressure on the battery device 100.

[0084] The support assembly 30 has a cavity 311 therein. Exemplarily, the extension direction of the cavity 311 is the same as the extension direction of the support assembly 30 , that is, the cavity 311 also extends along the first direction.

[0085] Here, by providing the cavity 311 inside the support assembly 30 , it is beneficial to reduce the weight of the support assembly 30 and also beneficial to provide a certain buffer space for the support assembly 30 .

[0086] The battery device 100 provided in an embodiment of the present application includes a housing assembly 20, a battery cell assembly 10, and a support assembly 30. The battery cell assembly 10 is disposed within the housing cavity of the housing assembly 20, and the housing assembly 20 protects the battery cell assembly 10. Furthermore, by disposing the support assembly 30 on at least one side of the battery cell assembly 10 along the second direction, the support assembly 30 is located between the battery cell assembly 10 and the housing assembly 20. This allows the support assembly 30 to disperse the local impact force on the battery device 100 when subjected to side extrusion or side collision. This helps disperse the force applied to the battery device 100, i.e., reduces the local pressure on the battery device 100, thereby improving the battery device 100's anti-extrusion and anti-collision performance to a certain extent, thereby enhancing the battery device 100's reliability. Furthermore, by providing a cavity 311 within the support assembly 30, the weight of the support assembly 30 is reduced while providing a buffer space for the support assembly 30, further improving the battery device 100's anti-extrusion and anti-collision performance.

[0087] In some embodiments, see Figures 3 to 5The support assembly 30 includes a support member 31, the support member 31 extends along a first direction, and the interior of the support member 31 has a cavity 311. The support member includes continuous fibers and a matrix.

[0088] That is to say, the support member 31 is the main structure of the support assembly 30 and plays a major supporting role.

[0089] It should be noted that the specific structural form of the support member 31 is not limited here.

[0090] For example, see Figures 5 and 6 The support member 31 has a first side wall 312 and a second side wall 313 that are oppositely disposed along the second direction. The first side wall 312 is used to support and cooperate with the battery cell assembly 10, and the second side wall 313 is used to support and cooperate with the box assembly 20.

[0091] The first side wall 312 is used to support and cooperate with the battery cell assembly 10 , which means that the first side wall 312 may directly abut against the battery cell assembly 10 or indirectly abut against the battery cell assembly 10 , thereby achieving support for the battery cell assembly 10 .

[0092] The second side wall 313 is used to support and cooperate with the box assembly 20, which means that the second side wall 313 is used to directly abut against the box assembly 20, or it can be indirectly abutted against the box assembly 20, thereby achieving support for the box assembly 20.

[0093] In this embodiment, the support member 31 is provided with a first side wall 312 and a second side wall 313 opposite to each other along the second direction to respectively support and cooperate with the battery cell assembly 10 and the box assembly 20, so that when subjected to side extrusion and side collision, the support assembly 30 can disperse the local impact force on the battery device 100.

[0094] It should be noted that the specific shape of the support member 31 is not limited here.

[0095] In some embodiments, see Figures 5 and 6 The support member 31 has a third side wall 314 and a fourth side wall 315 arranged opposite to each other along the height direction of the battery device 100 . The first side wall 312 , the third side wall 314 , the second side wall 313 and the fourth side wall 315 are connected end to end and enclose a cavity 311 .

[0096] Here, the first side wall 312, the third side wall 314, the second side wall 313 and the fourth side wall 315 are connected end to end and enclosed to form a cavity 311. That is to say, in the cross-section perpendicular to the extension direction of the support member 31, the cross-section of the support member 31 is roughly polygonal, which is beneficial to improving the supporting stability of the support member 31.

[0097] Exemplarily, the first side wall 312 is substantially planar or completely planar, which helps to improve the supporting stability of the first side wall 312 and the battery cell assembly 10 .

[0098] Exemplarily, the second side wall 313 is substantially planar or completely planar, which helps to improve the supporting stability of the second side wall 313 and the box assembly 20 .

[0099] Exemplarily, the third side wall 314 is configured to contact the bottom wall of the box assembly 20. Here, the third side wall 314 is substantially planar or completely planar, or at least the area where the third side wall 314 is connected to the box assembly 20 is planar, thereby improving the stability and reliability of the connection between the support member 31 and the box assembly 20.

[0100] Exemplarily, the fourth side wall 315 is substantially planar or completely planar, and the fourth side wall 315 is connected to the top ends of the first side wall 312 and the second side wall 313 .

[0101] In some embodiments, please refer to Figures 5 and 6 , a dimension of the first side wall 312 in the height direction of the battery device 100 is greater than a dimension of the second side wall 313 in the height direction of the battery device 100 .

[0102] In this way, on the one hand, by increasing the size of the first side wall 312 in the height direction of the battery device 100, it is beneficial to increase the contact area between the first side wall 312 and the battery cell assembly 10, and can disperse the local impact force on the battery cell 11. This is beneficial to disperse the force on the battery cell 11, that is, reduce the local pressure of the battery cell 11, and further improve the anti-extrusion performance and anti-collision performance of the battery device 100; on the other hand, by setting the size of the second side wall 313 in the height direction of the battery device 100 to be smaller than the size of the first side wall 312 in the height direction of the battery device 100, it is beneficial to reduce the space occupied by the support member 31, and can have an avoidance effect on the box assembly 20.

[0103] In some embodiments, please refer to Figures 5 and 6 The support member 31 includes a support body and a reinforcing rib 316. The interior of the support body has a cavity 311. The reinforcing rib 316 is arranged in the cavity 311 and divides the cavity 311 into a plurality of sub-cavities.

[0104] The support body has a cavity 311 therein, that is, the support body forms the outline shape of the support member 31 .

[0105] Exemplarily, the support body has a first side wall 312 , a third side wall 314 , a second side wall 313 and a fourth side wall 315 .

[0106] Here, the specific number of the reinforcing ribs 316 is not limited, and can be one or more.

[0107] In the embodiments of the present application, a plurality refers to a number of two or more.

[0108] In this embodiment, by configuring the support member 31 to include a support body and a reinforcing rib 316, and arranging the reinforcing rib 316 in the cavity 311, the reinforcing rib 316 can support the support body, thereby improving the structural strength of the support member 31, and further improving the anti-extrusion performance and anti-collision performance of the battery device 100.

[0109] It should be noted that there are many specific ways to configure the reinforcing ribs 316.

[0110] In some embodiments, see Figures 4 to 6 In a cross section perpendicular to the first direction, the extending direction of the reinforcing rib 316 intersects with the height direction of the battery device 100 .

[0111] The extending direction of the reinforcing rib 316 intersecting the height direction of the battery device 100 means that the extending direction of the reinforcing rib 316 is not parallel to the height direction of the battery device 100 .

[0112] Exemplarily, the reinforcing rib 316 extends along the second direction.

[0113] Exemplarily, one end of the reinforcing rib 316 close to the battery cell assembly 10 is connected to the first side wall 312 , and one end away from the battery cell assembly 10 is connected to the second side wall 313 , the third side wall 314 or the fourth side wall 315 .

[0114] In this embodiment, by setting the extension direction of the reinforcing rib 316 to intersect with the height direction of the battery device 100, it is beneficial to improve the structural strength of the reinforcing rib 316 on the supporting body in the second direction, thereby further improving the anti-extrusion performance and anti-collision performance of the battery device 100.

[0115] In some embodiments, see Figure 5 , the support assembly 30 also includes a filling piece 32.

[0116] Here, the filling member 32 may be disposed between the support member 31 and the battery cell assembly 10 ; or may be disposed between the support member 31 and the box assembly 20 .

[0117] That is, the filling member 32 is disposed between the support member 31 and the battery cell assembly 10 , and can fill the gap between the support member 31 and the battery cell assembly 10 .

[0118] Likewise, the filling member 32 is disposed between the support member 31 and the box assembly 20 to fill the gap between the support member 31 and the box assembly 20 .

[0119] Here, the filling member 32 is arranged between the support member 31 and the box assembly 20, which may mean that the filling member 32 is arranged between the side of the support member 31 away from the battery cell 11 along the second direction and the side wall of the accommodating cavity, or it may mean that the filling member 32 is arranged between the bottom wall of the support member 31 and the bottom wall of the box assembly 20.

[0120] In this embodiment, the support assembly 30 improves the shaking of the support member 31 in the box assembly 20 by providing a filler 32, and providing the filler 32 between the support member 31 and the battery cell assembly 10, and / or providing the filler 32 between the support member 31 and the box assembly 20, thereby improving the support effect of the support assembly 30, and further improving the anti-extrusion performance and anti-collision performance of the battery device 100. In other words, the assembly tolerance can be absorbed by the filler 32, which is beneficial to improving the versatility of the support assembly 30, that is, the support assembly 30 can be applicable to different types of battery devices 100, thereby reducing costs.

[0121] It should be noted that the specific type of the filling member 32 is not limited here.

[0122] In some embodiments, see Figure 5 The filling member 32 includes at least one of a buffer member and an adhesive layer.

[0123] That is to say, the filling member 32 may be a buffer member, or an adhesive layer, or may include both a buffer member and an adhesive layer.

[0124] Here, the adhesive layer may be an adhesive layer formed by applying glue between the filler 32 and the battery cell assembly 10 or between the filler 32 and the box assembly 20 and solidifying the glue, or may be solid glue, etc.

[0125] Illustratively, the adhesive layer may be at least one of polyurethane, epoxy, and pressure-sensitive adhesive.

[0126] In the embodiment where the filling member 32 comprises a buffer member, the filling member 32 can absorb assembly tolerances and also play a buffering role.

[0127] Exemplarily, the buffer member is, for example, foam.

[0128] In the embodiment where the filling member 32 includes an adhesive layer, the filling member 32 can absorb assembly tolerances and also play a bonding role, which is beneficial to improving connection stability and facilitating production and manufacturing.

[0129] Here, the bottom wall of the support member 31 and the bottom wall of the box assembly 20 may also be connected via an adhesive layer.

[0130] In some embodiments, please refer to Figure 5 The box assembly 20 includes a box body 21 and a reinforcement 22 , and the support assembly 30 is located between the battery cell assembly 10 and the reinforcement 22 .

[0131] Here, the specific type of the reinforcement member 22 is not limited. Exemplarily, the reinforcement member 22 is, for example, a sheet metal member.

[0132] In this embodiment, the box assembly 20 is configured to include a box body 21 and a reinforcement 22, so that the structural strength of the box assembly 20 is improved by the reinforcement 22, and the support assembly 30 is located between the battery cell assembly 10 and the reinforcement 22, which is conducive to improving the assembly convenience of the support assembly 30.

[0133] Here, the specific type of the box assembly 20 is not limited.

[0134] In some embodiments, see Figures 3 to 5 The box assembly 20 includes a plate-shaped structural member formed by extrusion or stamping, and the support assembly 30 is located between the battery cell assembly 10 and the plate-shaped structural member.

[0135] Here, the plate-like structural member refers to a member similar to a metal plate, that is, the box body 21 is formed by directly extruding the metal plate, or the box body 21 is formed by stamping the metal plate.

[0136] The box assembly 20 of the embodiment of the present application is configured to include a plate-like structural member formed by extrusion or stamping, and is located between the battery cell assembly 10 and the plate-like structural member through the support assembly 30. This structure not only reduces the weight of the box assembly 20 and reduces costs, but also helps to improve the anti-extrusion performance and anti-collision performance of the battery device 100, thereby improving the reliability of the battery device 100.

[0137] In some embodiments, the support member 31 is a non-metallic member.

[0138] It can be understood that, compared with metal parts, the sealing of non-metal parts is smaller. Therefore, given the size of the box, the non-metal parts are lighter, which is beneficial to reducing the weight.

[0139] For example, the non-metallic part may be an injection molded part or a composite part.

[0140] In this embodiment, by configuring the support member 31 as a non-metallic member, the weight of the support member 31 is reduced, thereby reducing the weight of the battery device 100 .

[0141] In some embodiments, the support member 31 includes continuous fibers and a matrix, the matrix is ​​attached to the continuous fibers, and the extending direction of the continuous fibers is a first direction.

[0142] Specifically, the continuous fiber is a flexible long strip structure with a certain width and thickness, but the length can be extended and bent according to actual conditions.

[0143] Illustratively, the continuous fiber is, for example, a continuous glass fiber, and has insulating properties.

[0144] Here, the matrix is, for example, a thermoplastic resin. Thermoplastic resins soften upon heating and harden upon cooling, and they are chemically non-reactive, maintaining this property regardless of repeated heating and cooling cycles. Thermoplastic resins, due to their excellent toughness, high damage tolerance, and good dielectric constant, have an unlimited shelf life, do not require low-temperature storage, and do not require large, specialized equipment such as autoclaves for molding. Furthermore, their recyclability, recoverability, and environmental friendliness make them well-suited to the current trend of environmentally friendly materials.

[0145] Of course, in other embodiments, the matrix may also be a thermosetting resin.

[0146] In this embodiment, the support member 31 is configured to include continuous fibers and a matrix, with the matrix attached to the continuous fibers. This means that the support member 31 can be a composite plate, which exhibits low density, light weight, and high strength. This reduces the weight of the support member 31, thereby reducing the weight of the battery device 100, while also improving the structural strength of the support member 31. Furthermore, by configuring the continuous fibers to extend in a first direction, i.e., the front-to-back direction of the battery device 100, the support member 31's anti-extrusion and anti-collision properties are further improved.

[0147] In some embodiments, the support assembly 30 further includes a biaxial cloth, which is disposed on the surface of the support member 31 .

[0148] Biaxial fabric is made of two perpendicular warp and weft yarns. The warp and weft yarns are interwoven horizontally to form a mesh structure, while running parallel to each other vertically. Biaxial fabric has excellent elasticity and wrinkle resistance, while also being soft and comfortable.

[0149] In this embodiment, by providing a biaxial cloth on the surface of the support member 31 , the structural strength of the support member 31 in a direction perpendicular to the first direction is improved.

[0150] In some embodiments, the support assembly 30 further includes a triaxial cloth, which is disposed on the surface of the support member 31 .

[0151] Triaxial fabric is composed of three perpendicular warp, weft, and tension cords. These threads are interwoven horizontally to form a mesh structure, while remaining parallel to each other longitudinally. This gives triaxial fabric greater strength and abrasion resistance, while also being stiff and durable.

[0152] In this embodiment, by arranging a triaxial cloth on the surface of the support member 31 , the structural strength of the support member 31 in a direction perpendicular to the first direction is improved.

[0153] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A battery device, characterized in that: include: A box assembly, wherein the box assembly has a receiving cavity inside; A battery cell assembly, wherein the battery cell assembly is disposed in the accommodating cavity; A support assembly, the support assembly is arranged in the accommodating cavity, the support assembly extends along a first direction, and the interior of the support assembly has a cavity; The support assembly is located on at least one side of the battery cell assembly along the second direction, and is located between the battery cell assembly and the box assembly; at least a portion of the support assembly includes continuous fibers and a matrix, the matrix is ​​attached to the continuous fibers, and the extension direction of the continuous fibers is the first direction; wherein the first direction intersects with the second direction, and the first direction is the front-to-back direction of the battery device.

2. The battery device according to claim 1, characterized in that: The support assembly comprises a support member, the support member extends along the first direction, the interior of the support member has the cavity, and the support member comprises the continuous fiber and the matrix; The support member has a first side wall and a second side wall that are arranged opposite to each other along the second direction. The first side wall is used for supporting and cooperating with the battery monomer assembly, and the second side wall is used for supporting and cooperating with the box assembly.

3. The battery device according to claim 2, characterized in that: The support member has a third side wall and a fourth side wall which are arranged opposite to each other along the height direction of the battery device. The first side wall, the third side wall, the second side wall and the fourth side wall are connected end to end and surround the cavity.

4. The battery device according to claim 2, characterized in that: A dimension of the first side wall in a height direction of the battery device is greater than a dimension of the second side wall in the height direction of the battery device.

5. The battery device according to claim 2, characterized in that: The support member comprises a support body and reinforcing ribs. The support body has the cavity inside. The reinforcing ribs are arranged in the cavity and divide the cavity into a plurality of sub-cavities.

6. The battery device according to claim 5, characterized in that: On a cross section perpendicular to the first direction, an extending direction of the reinforcing rib intersects with a height direction of the battery device.

7. The battery device according to claim 2, characterized in that: The support assembly further includes a filling member; the filling member is arranged between the support member and the battery cell assembly; and / or, The filling member is arranged between the supporting member and the box assembly.

8. The battery device according to claim 7, characterized in that: The filling member includes at least one of a buffer member and an adhesive layer.

9. The battery device according to claim 1, characterized in that: The box assembly includes a box body and a reinforcement member, and the support assembly is located between the battery cell assembly and the reinforcement member.

10. The battery device according to claim 1, characterized in that: The box assembly includes a plate-shaped structural member formed by extrusion or stamping, and the support assembly is located between the battery cell assembly and the plate-shaped structural member.

11. The battery device according to claim 2, characterized in that: The support assembly further comprises a biaxial cloth, wherein the biaxial cloth is arranged on the surface of the support member; and / or, The support assembly further comprises a three-axis cloth, and the three-axis cloth is arranged on the surface of the support member.

12. An energy storage device, characterized in that: The invention comprises a plurality of battery devices according to any one of claims 1 to 11, wherein the battery devices are used to store or provide electrical energy.

13. An electrical device, characterized in that: It comprises the battery device according to any one of claims 1 to 11 or the energy storage device according to claim 12, wherein the battery device is used to store or provide electrical energy.

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