Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device. It relates to the technical field of batteries. The battery device comprises a box assembly, a battery monomer group, a pull plate device and a busbar. The box assembly is used for defining a containing cavity, and comprises a first wall. The battery monomer group is arranged in the containing cavity, and comprises a plurality of battery monomers. The plurality of battery monomers are stacked along a first direction, and the battery monomers are carried on the first wall. The pull plate device comprises at least one first pull plate. The first pull plate covers at least part of the pole of the battery monomer group from the side of the battery monomer group away from the first wall. The busbar is located between the battery monomer group and the first pull plate. The first pull plate is connected with the busbar and / or the shell of the battery monomer. The degree of wear of the battery monomer group is reduced.

Description

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to PCT patent application No. PCT / CN2025 / 082965, filed on March 17, 2025, entitled “Battery Device and Electric Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0004] 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.

[0005] In electrical devices equipped with battery units, the battery unit typically includes a housing assembly and a group of individual battery cells located within the housing assembly. When the battery unit vibrates, the individual battery cells may wear out. Utility Model Content

[0006] In view of this, embodiments of this application provide a battery device and an electrical device to reduce the degree of wear and tear on battery cells.

[0007] A first aspect of this application provides a battery device, comprising: a housing assembly for defining a receiving cavity, the housing assembly including a first wall; a battery cell group disposed within the receiving cavity, the battery cell group including a plurality of battery cells stacked along a first direction, the battery cells supported on the first wall; a pull plate device including at least one first pull plate, the first pull plate covering at least a portion of the terminal posts of the battery cell group from a side of the battery cell group away from the first wall; and a busbar located between the battery cell group and the first pull plate, the first pull plate being connected to the busbar and / or the housing of the battery cells.

[0008] In this embodiment, the first pull plate is connected to the busbar, which is electrically connected to the individual battery cells. This connection mitigates displacement of the battery cells within the battery pack during vibration, reducing wear on the battery pack. The first pull plate is also connected to the outer casing of the individual battery cells, further mitigating displacement and reducing wear on the battery pack. Additionally, the first pull plate provides protection for the busbar.

[0009] In some embodiments, the pull plate device includes a main body, and the main body of the first pull plate includes a support portion, which is connected to the busbar.

[0010] In this embodiment, the connection between the bearing portion and the busbar facilitates a more effective connection between the first pull plate and the busbar.

[0011] In some embodiments, the carrier is bonded to the busbar.

[0012] In this embodiment, the carrier is bonded to the busbar, which helps to improve the connection strength and connection area between the carrier and the battery cell assembly.

[0013] In some embodiments, the number of battery cell groups is multiple, and the multiple battery cell groups are arranged along a second direction to form a battery cell array, the second direction intersecting with the first direction; the battery device also includes a sampling component, which is electrically connected to the battery cell group, the thickness direction of the first wall is a third direction, which intersects with the first direction and the second direction respectively, and the sampling component is located between the battery cell group and the first pull plate along the third direction; the main body of the first pull plate also includes a clearance portion connected to at least one side of the corresponding support portion along the second direction, the clearance portion covering the sampling component, and the clearance portion protruding from the support portion along the third direction away from the first wall to avoid the sampling component.

[0014] In this embodiment, the sampling component is electrically connected to the battery cell group. The sampling component can collect physical quantities such as temperature and voltage of the battery cell group. Therefore, the battery cell group can be monitored and managed based on the collected physical parameters, ensuring that the battery cell group can work normally, which helps to extend the service life of the battery device and reduces the probability of thermal runaway of the battery cells. Moreover, the avoidance part protrudes from the support part along a third direction away from the first wall to avoid the sampling component. The avoidance part can avoid the sampling component and improve the structural compactness of the housing assembly.

[0015] In some embodiments, the clearance portion has a weight-reducing hole penetrating the clearance portion in a third direction; the main body portion of the first pull plate also includes a protective cover, which is connected to the side of the clearance portion away from the battery cell pack in a third direction, the protective cover covers the weight-reducing hole, and the density of the material of the protective cover is less than the density of the material of the clearance portion.

[0016] In this embodiment, since the clearance portion has a weight-reducing hole penetrating the clearance portion in a third direction, the weight of the clearance portion can be reduced, thereby reducing the weight of the plate-pulling device and improving the lightweighting of the battery device. Because the protective cover covers the weight-reducing hole, and the density of the protective cover material is less than that of the clearance portion material, the weight of the protective cover can be reduced while decreasing the probability of foreign objects entering the sampling assembly, thus reducing the weight of the plate-pulling device and improving the lightweighting of the battery device.

[0017] In some embodiments, the protective cover includes a plurality of protective walls surrounding a protective cavity, and the protective cover also has a protective opening communicating with the protective cavity, the protective opening facing the weight reduction hole in a first direction, and a portion of the sampling component passing through the protective opening and located within the protective cavity.

[0018] In this embodiment, since the sampling component passes through the protective opening and is located inside the protective cavity, the protective cover can avoid the sampling component, thereby improving the structural compactness of the housing assembly.

[0019] In some embodiments, the plurality of protective walls include a plurality of protective sidewalls that surround to form a protective opening. The protective cover also includes a protective connecting wall that is connected to the side of the protective sidewalls facing away from the protective cavity and is connected to the clearance portion.

[0020] In the embodiments of this application, since the protective connecting wall is connected to the avoidance part, the connection area between the protective cover and the avoidance part can be increased, thereby increasing the connection strength between the protective cover and the avoidance part.

[0021] In some embodiments, the battery device further includes a first connector, which connects the protective connection wall and the clearance portion along a third direction; and / or, the protective connection wall and the clearance portion are at least bonded together.

[0022] In the embodiments of this application, since the first connector connects the protective connecting wall and the clearance portion; and / or the protective connecting wall and the clearance portion are at least bonded, the degree of freedom in the connection form of the protective connecting wall and the clearance portion can be increased. Moreover, the above connection method is simple, which can simplify the manufacturing process of the first pull plate, thereby improving the production efficiency of the first pull plate and thus improving the production efficiency of the battery device.

[0023] In some embodiments, the battery device further includes: a wiring harness located within the housing assembly; and an electrical component located within the housing assembly, the electrical component being located on a side of the protective cover facing away from the battery cell pack along a third direction; wherein the protective cover has a wiring harness clearance opening through which the wiring harness passes, one end of the wiring harness being connected to a sampling component, and the other end of the wiring harness being connected to the sampling component and / or the electrical component.

[0024] In this embodiment, since the sampling component and the electrical component are connected, the working status of the battery cell group can be monitored and managed based on the physical parameters obtained by the sampling module. Moreover, since the protective cover has a wire harness avoidance opening, the wire harness passes through the wire harness avoidance opening to connect different sampling components or to connect the sampling component and the electrical component, thus facilitating the electrical connection between different sampling components or between the sampling component and the electrical component.

[0025] In some embodiments, the housing assembly includes two side beams disposed opposite each other along a first direction, the two side beams being used to constrain the battery cell assembly, the side beams being connected to opposite ends of a first wall along the first direction, and the pull plate device including a main body and a connecting part, the connecting part being located at both ends of the main body along the first direction, and the connecting part being connected to the side beams.

[0026] In this embodiment, since the connecting part is connected to the side beam, part of the expansion force of the battery cell pack borne by the side beam can be transmitted to the first pull plate. In other words, the first pull plate can share the expansion force of the battery cell pack with the side beam, thereby improving the modulus and strength of the housing assembly, especially improving the modulus of the housing assembly along the first direction, and reducing the probability of bending deformation of the side beam and / or reducing the amount of deformation when the side beam bends.

[0027] In some embodiments, the side beam includes a second wall and a reinforcing member disposed on the second wall, and the connecting portion is connected to the reinforcing member.

[0028] In this embodiment, the reinforcing member further strengthens the side beam, thereby reducing the probability or degree of deformation of the side beam due to the expansion of the battery cell assembly. The connecting part is connected to the reinforcing member, and the connecting part and the reinforcing member can jointly share the expansion force of the battery cell assembly, thereby further improving the modulus and strength of the housing assembly.

[0029] In some embodiments, the thickness direction of the first wall is a third direction, which intersects with the first direction; at least one reinforcing member is a first reinforcing member, at least one second wall is a first sub-wall, the first reinforcing member is connected to the side of the first sub-wall opposite to the first wall along the third direction, and the side of the first sub-wall opposite to the battery cell assembly along the first direction extends beyond the side of the first reinforcing member opposite to the battery cell assembly along the first direction; at least one connecting portion is a first connecting portion, which is connected to the side of the first reinforcing member opposite to the battery cell assembly along the first direction.

[0030] In this embodiment, since the first connecting portion is connected to the side of the first reinforcing member opposite to the battery cell along the first direction, it helps to increase the connection area between the first connecting portion and the first reinforcing member. This allows the expansion force borne by the first reinforcing member along the first direction to be better transmitted to the first pull plate, thereby further improving the modulus and strength of the housing assembly along the first direction. Furthermore, the first reinforcing member can provide support force to the first connecting portion along the first direction, more effectively supporting the first connecting portion. Also, the side of the first sub-wall opposite to the battery cell assembly along the first direction extends beyond the side of the first reinforcing member opposite to the battery cell assembly along the first direction. Therefore, it provides clearance space for the first connecting portion to be connected to the surface of the first reinforcing member opposite to the battery cell along the first direction, which is beneficial for a smaller overall size formed by the first pull plate and the first sub-wall, improving the miniaturization of the battery device.

[0031] In some embodiments, the first pull plate further includes a reinforcing portion connected to the first reinforcing member, the reinforcing portion being connected between the main body portion and the first connecting portion, and the thickness of the reinforcing portion along a third direction being greater than the thickness of the main body portion along a third direction.

[0032] In the embodiments of this application, the thickness of the reinforcing part along the third direction is greater than the thickness of the main body part along the third direction. As a result, the reinforcing part is thicker and stronger, which reduces the probability or degree of deformation of the reinforcing part due to stress concentration.

[0033] In some embodiments, the battery device further includes a second connector and a third connector. Along a third direction, the second connector connects the reinforcement portion and the first reinforcement member; along a first direction, the third connector connects the first connector portion and the first reinforcement member.

[0034] In this embodiment, along a third direction, the second connector connects the reinforcing portion and the first reinforcing member; along a first direction, the third connector connects the first connecting portion and the first reinforcing member. This improves the connection strength between the first pull plate and the first reinforcing member, reducing the probability of the first pull plate separating from the first reinforcing member due to the expansion force of the battery cell assembly.

[0035] In some embodiments, the battery device further includes a sampling component, with a side beam having at least one clearance groove, and a portion of the sampling component located within the clearance groove.

[0036] In this embodiment, since the side beam has at least one clearance groove, the side beam can avoid the sampling component, thus preventing interference between the side beam and the sampling component.

[0037] In some embodiments, the thickness direction of the first wall is a third direction, which intersects with the first direction; at least one reinforcing member is a second reinforcing member, at least one second wall is a second sub-wall, the second reinforcing member is connected to the side of the second sub-wall facing the battery cell assembly along the first direction, and at least one connecting portion is a second connecting portion, wherein the second connecting portion is connected to the side of the second reinforcing member away from the first wall along the third direction.

[0038] In this embodiment, the second connecting part is connected to the side of the second reinforcing member that is away from the first wall in a third direction, thus enabling the connection between the second connecting part and the second reinforcing member.

[0039] In some embodiments, along a third direction, the thickness of the second connecting portion is greater than the thickness of the main body portion.

[0040] In this embodiment, along the third direction, the thickness of the second connecting part is greater than the thickness of the main body. Therefore, the second connecting part is thicker and stronger, which reduces the probability of deformation of the second connecting part due to stress concentration or reduces the degree of deformation of the second connecting part due to stress concentration.

[0041] In some embodiments, the battery device further includes a fourth connector, which connects to the second connector and the second reinforcement in a third direction.

[0042] In this embodiment, along the third direction, the fourth connector connects the second connector and the second reinforcing member, which helps to improve the connection strength between the first pull plate and the second reinforcing member and reduce the probability of the first pull plate and the second reinforcing member separating due to the expansion force of the battery cell assembly.

[0043] In some embodiments, the battery device further includes: a support assembly located within the housing assembly, the support assembly including a support mounting portion and a support support portion connected to the support mounting portion, the support mounting portion being connected to the side of the support portion facing away from the battery cell pack in a third direction, the support support portion being further away from the battery cell pack in the third direction than the clearance portion, and the support support portion spanning opposite sides of the clearance portion in a second direction; and an electrical component located within the housing assembly, the electrical component being connected to the side of the support support portion facing away from the battery cell pack in a third direction.

[0044] In this embodiment, since the battery device also includes a bracket device, and the electrical components are connected to the bracket support of the bracket device, the electrical components can be assembled into the housing assembly, and the relative position of the electrical components and the bracket device can be fixed, reducing the probability of unstable electrical connection of the electrical components due to shaking.

[0045] In some embodiments, support brackets that support the same electrical component are spaced apart.

[0046] In this embodiment, since the support devices for supporting the same electrical component are spaced apart, the electrical component can be supported more effectively, making the electrical component more securely fixed.

[0047] In some embodiments, the battery device further includes a fifth connector located within the housing assembly, the fifth connector including a connector body and a flange connected to the outer peripheral surface of the connector body, at least a portion of the connector body passing through the bracket support and the electrical assembly, and the flange contacting the side of the bracket support facing the battery cell assembly in a third direction.

[0048] In this embodiment, since at least a portion of the connecting body passes through the bracket support and the electrical components, the fifth connector can be used to assemble the bracket support and the electrical components. The structure is simple, and the flange contacts the side of the bracket support facing the battery cell pack in the third direction. Therefore, the flange can connect with the bracket support, further improving the connection strength between the fifth connector and the bracket support, thereby improving the connection strength between the electrical components and the bracket device, and further reducing the probability of unstable electrical connection of the electrical components due to shaking.

[0049] In some embodiments, the flange is bonded to the side of the support portion facing the battery cell assembly in a third direction.

[0050] In this embodiment, since the flange and the bracket support are bonded to the side of the battery cell assembly in the third direction, the connection strength between the fifth connector and the bracket support can be further improved, thereby further improving the connection strength between the electrical components and the bracket device, and further reducing the probability of unstable electrical connection of the electrical components due to shaking.

[0051] In some embodiments, an adhesive is provided between the flange and the support portion, the flange having a through hole projected along a third direction, the projection of the through hole at least partially overlapping the projection of the adhesive.

[0052] In this embodiment, since there is an adhesive between the flange and the support portion, and the flange has a through hole, the bonding condition between the flange and the support portion can be observed through the through hole, and the adhesive can overflow into the through hole, thereby improving the effectiveness and strength of the connection between the flange and the support portion.

[0053] In some embodiments, the electrical components include a main control module; a plurality of support portions and clearance portions are alternately arranged in sequence along a second direction; at least one support device is a first support, the first support includes a plurality of support mounting portions and a plurality of support portions alternately arranged along the second direction, the first support spans the plurality of clearance portions along the second direction, and the plurality of support portions are connected to the main control module.

[0054] In this embodiment, since the first bracket spans multiple clearance portions along the second direction, and since the bracket support portion is connected to the load-bearing portion, multiple bracket support portions of the same first bracket can be connected to different load-bearing portions respectively, increasing the connection area between the first bracket and the load-bearing portion, thereby increasing the connection strength between the first bracket and the load-bearing portion. Moreover, since the first bracket includes multiple bracket mounting portions and multiple bracket support portions alternately arranged along the second direction, the strength of the first bracket can be improved, which is beneficial for the first bracket to more effectively support the main control module.

[0055] In some embodiments, the electrical component includes a high-voltage box; at least two support devices are second supports, and a plurality of support mounting portions in the second supports are arranged circumferentially at intervals along the support portion, and at least two second supports respectively support opposite ends of the high-voltage box.

[0056] In this embodiment, since at least two second brackets support opposite ends of the high-voltage box, the high-voltage box can be secured with fewer brackets while reducing material usage. Because multiple bracket mounting portions are arranged circumferentially along the bracket support portion, the connection area between the second bracket and the load-bearing portion is increased, thereby improving the connection strength between the second bracket and the load-bearing portion.

[0057] In some embodiments, a portion of the support portion of the second bracket has an opening.

[0058] In this embodiment, since the support portion of the second bracket has an opening, the weight of the second bracket can be improved, thereby improving the weight of the battery device.

[0059] In some embodiments, the battery device further includes a wiring harness and a plurality of wire fasteners connected to the support portion on the side opposite to the battery cell pack in a third direction. At least one wire fastener is a first wire fastener, which includes a base and a wire fastening portion. In a third direction, the base is connected between the wire fastening portion and the support portion. The wire fastening portion has a wire through hole through which the wiring harness passes and is fixed to the wire fastening portion. The third direction intersects the first direction.

[0060] In this embodiment, the battery device further includes a first wire fixing member, which can fix the relative position of the wire harness and improve the neatness of the wire harness in the battery device. Moreover, since the wire fixing part has a wire through hole, the wire harness passes through the wire through hole and is fixed to the wire fixing part. Therefore, the first wire fixing member can be used in areas with relatively small wiring space within the battery device.

[0061] In some embodiments, the battery device further includes a wiring harness and a plurality of wire fasteners connected to the support portion on the side of the battery cell assembly in a third direction. At least one wire fastener is a second wire fastener, which includes a first wire fastener wall, a second wire fastener wall, and a third wire fastener wall connected in sequence. The first wire fastener wall and the third wire fastener wall are disposed opposite each other in a third direction. The first wire fastener wall is connected to the support portion, and the wiring harness is fixed to the second wire fastener between the first wire fastener wall and the third wire fastener wall. The third direction intersects the first direction.

[0062] In this embodiment, the battery device further includes a second wire fixing member, which can fix the relative position of the wire harness and improve the neatness of the wire harness in the battery device. Furthermore, since the second wire fixing member includes a first wire fixing wall, a second wire fixing wall, and a third wire fixing wall connected in sequence, with the first and third wire fixing walls arranged opposite each other along a third direction, and the wire harness fixed to the second wire fixing member between the first and third wire fixing walls, the first wire fixing member can be used for wire harnesses with cable ties, facilitating the entry of the portion of the wire harness with cable ties into the second wire fixing member through its position relative to the second wire fixing wall.

[0063] In some embodiments, the battery device further includes a wiring harness and a plurality of wire fasteners connected to the support portion along a third direction away from the battery cell assembly. At least one wire fastener is a third wire fastener, which includes a wire fastener body portion and wire fastener connecting portions connected to opposite sides of the wire fastener body portion. The wire fastener connecting portions are connected to the support portion. Along the third direction, the wire fastener body portion protrudes relative to the wire fastener connecting portions along the side away from the support portion. The wire fastener body portion and the support portion form a through hole around each other. The wiring harness passes through the through hole and is fixed to the third wire fastener. The third direction intersects the first direction.

[0064] In this embodiment, the battery device further includes a third wire fixing member, which can fix the relative position of the wire harness and improve the regularity of the wire harness in the battery device. Furthermore, since the third wire fixing member includes a wire fixing main body and wire fixing connecting parts connected to opposite sides of the wire fixing main body, and the wire fixing connecting parts are connected to the support part, the connection strength between the third wire fixing member and the support part can be improved, reducing the probability that the wire harness fixed to the third wire fixing member will move due to insufficient fixing strength.

[0065] In some embodiments, the plate pulling device is a fiber composite plate pulling device.

[0066] In the embodiments of this application, the fiber composite sheet uses fiber composite material, which is lightweight and has high strength. This helps to improve the structural strength of the housing assembly while reducing the weight of the battery device and increasing the energy density of the battery device.

[0067] In some embodiments, the fiber composite sheet includes a first substrate and a first fiber, the first fiber being a continuous fiber, and the sheet-pulling device includes a main body in which the first fiber extends along a first direction.

[0068] In this embodiment of the application, the first fiber in the fiber composite sheet is configured to extend along a first direction, which can improve the modulus and strength of the fiber composite sheet along the first direction, thereby improving the modulus and strength of the housing assembly along the first direction.

[0069] In some embodiments, the first wall includes a laminated insulating structure layer and a fiber composite material layer, wherein the insulating structure layer is located between the fiber composite material layer and the battery cell assembly along the thickness direction of the first wall.

[0070] In the embodiments of this application, the insulating structure layer is used to support the battery cell pack and also to electrically isolate the battery cell pack from the outside world, reducing external interference to the battery cell pack. The combination of the insulating structure layer and the fiber composite material layer helps the housing assembly to take into account both structural strength and protective performance.

[0071] In some embodiments, the first pull plate is connected to the housing of the battery cell shoulder, which is exposed to the busbar.

[0072] In this embodiment, the degree of freedom in connecting the first pull plate to the battery cell is increased.

[0073] In some embodiments, an insulating layer is formed on the side of the first pull plate facing the battery cell.

[0074] In this embodiment, since the first pull plate may come into direct or indirect contact with the battery cell, an insulating layer is formed on the side of the first pull plate facing the battery cell, thereby improving the reliability of the battery device.

[0075] In some embodiments, the plate pulling device includes a main body, on the side of the main body facing the battery cell, an adhesive layer is disposed thereon.

[0076] In this embodiment, it helps to improve the connection strength between the first pull plate and the battery cell and reduce the connection difficulty.

[0077] In some embodiments, a second aspect of this application provides an electrical device, which includes the battery device described above.

[0078] This reduces the wear and tear on individual battery cells in electrical devices.

[0079] In some embodiments, the electrical device includes an aircraft.

[0080] This can reduce the degree of wear and tear on the battery cells in the aircraft. Attached Figure Description

[0081] Figure 1 This is a schematic diagram of the structure of the electrical device (aircraft) according to an embodiment of this application; Figure 2 This is an exploded perspective view of the battery device according to an embodiment of this application; Figure 3 This is a schematic diagram of one side structure of the battery device provided in the embodiments of this application; Figure 4 for Figure 3 A schematic diagram of the other side of the battery device; Figure 5 for Figure 3 A schematic diagram of the structure on another side of the battery device; Figure 6 for Figure 3 Explosion diagram of the battery device; Figure 7 This is an exploded view of the housing assembly according to an embodiment of this application; Figure 8 This is a cross-sectional structural diagram of the side beam according to an embodiment of this application; Figure 9 This is a schematic diagram of the structure of the first pull plate according to an embodiment of this application; Figure 10 for Figure 9 A schematic diagram of the AA cross-section; Figure 11 for Figure 10 Enlarged schematic diagram of part B; Figure 12 This is a schematic diagram showing the cooperation relationship between the third pull plate and the housing assembly in an embodiment of this application; Figure 13 An exploded perspective view of a portion of a battery device provided in another embodiment of this application; Figure 14 for Figure 13 Enlarged schematic diagram of region C; Figure 15 for Figure 13 Enlarged schematic diagram of region D; Figure 16 An exploded perspective view of the first pull plate and the part of the structure connected to the first pull plate provided in the embodiment of this application; Figure 17 for Figure 16 Enlarged schematic diagram of region E; Figure 18 for Figure 16 Enlarged schematic diagram of region F; Figure 19 An exploded perspective view of the support device and the fifth connector provided in the embodiments of this application; Figure 20 This is a three-dimensional exploded view of a battery cell provided in an embodiment of this application.

[0082] Explanation of reference numerals in the attached figures 1000. Aircraft; 100. Battery unit; 1. Battery cell array; 10. Battery cell group; 11. Battery cell; 111. Pressure relief mechanism; 112. Terminal post; 114. Electrode assembly; 1141. Tab; 115. Outer shell; 2. Housing assembly; 2a. Insulating structure layer; 2b. Fiber composite material layer; 21. Side beam; 21a. Clearance groove; 21b. Second positioning structure; 211. Hollow cavity; 212. Support structure; 213. First support body; 2131. Support plate; 2132. Extension plate; 2133. Reinforcing structure Structure; 214, Second support body; 215a, First sub-wall; 215b, Second sub-wall; 216a, First reinforcing member; 216b, Second reinforcing member; 22, First wall; 23, Side plate; 3, Fiber composite tension plate; 3a, Main body; 3b, Connecting part; 3c, Bending part; 3d, First positioning structure; 31, First tension plate; 31a, Clearance notch; 311, Bearing part; 312, Clearance part; 3121, Weight reduction hole; 313, Protective cover; 3131, Protective wall; 3134, Protective connecting wall; 3135, Wire harness clearance opening; 3 14. Reinforcing part; 314a. First aperture; 321. First connecting part; 321a. Third aperture; 322. Second connecting part; 322b. Fifth aperture; 32. Second pull plate; 33. Third pull plate; 200. Body; 4. Busbar; 5. Sampling assembly; 51. Output component; 52. Sampling transmission component; 53. Signal processing assembly; 62. Second connecting component; 63. Third connecting component; 64. Fourth connecting component; 65. Fifth connecting component; 651. Connecting body; 652. Flange; 6521. Through hole; 7. Electrical assembly; 71. Main control module; 72, high voltage box; 8, bracket device; 8a, first bracket; 8b, second bracket; 81, bracket mounting part; 82, bracket support part; 82a, seventh hole; 821, opening; 822, first support section; 823, second support section; 91, first wire fixing component; 911, base; 912, wire fixing part; 9121, wire through hole; 92, second wire fixing component; 921, first wire fixing wall; 922, second wire fixing wall; 923, third wire fixing wall; 93, third wire fixing component; 931, wire fixing body part; 932, wire fixing connection part. Detailed Implementation

[0083] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0084] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0085] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0086] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0087] In the description of this application, the orientation or positional relationship of "first direction", "second direction" and "third direction" are based on the orientation or positional relationship shown in the accompanying drawings. Among them, "first direction" is the direction indicated by arrow L1 in the accompanying drawings, "second direction" is the direction indicated by arrow L2 in the accompanying drawings, and "third direction" is the direction indicated by arrow L3 in the accompanying drawings. It should be understood that these orientation terms 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 orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0088] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0089] 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.

[0090] 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.

[0091] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power 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 cars, as well as in aerospace and other fields.

[0092] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0093] In some embodiments, a battery cell assembly is typically formed by multiple battery cells arranged in rows.

[0094] As an example, a battery cell assembly can be a battery module, which consists of multiple battery cells arranged and fixed together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0095] In some embodiments, the battery device may be a battery pack, which includes a housing assembly and one or more individual battery cells housed within the housing assembly.

[0096] As an example, the battery cell assembly can be a battery module, which can be housed in the housing by fixing the battery module in the housing assembly.

[0097] As an example, the battery cell assembly can also be housed within a housing by directly fixing multiple battery cells to the housing assembly. As an example, the housing assembly may include a first housing and a second housing. The first and second housings are fastened together, forming a closed space inside the housing assembly to house the battery cell assembly. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed. The first housing may be a top cover or a bottom plate.

[0098] As an example, the enclosure assembly may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are respectively connected to the frame, so that the interior of the enclosure assembly forms an enclosed space to house the individual battery cells.

[0099] In some embodiments, the housing assembly may be part of the vehicle's chassis structure. For example, a portion of the housing assembly may be at least a part of the vehicle / aircraft floor, or a portion of the housing assembly may be at least a part of the vehicle / aircraft's crossbeams and longitudinal beams.

[0100] 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.

[0101] 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.

[0102] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0103] In some embodiments, a battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0104] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0105] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided with one or more.

[0106] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0107] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and aircraft.

[0108] 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, rockets, space shuttles, and spacecraft.

[0109] In related technologies, battery devices typically include a housing assembly, a first pull plate, a busbar, and a battery cell assembly located within the housing assembly. The busbar is electrically connected to the battery cells in the battery cell assembly. The first pull plate abuts against the busbar, but is not connected to the busbar or the battery cell assembly. Neither the busbar nor the battery cells are fixed to the first pull plate. When the battery device vibrates, the vibrating first pull plate may have some displacement with respect to the battery cell assembly, resulting in wear of the battery cell assembly.

[0110] Research has shown that a pull plate device can be installed between the battery cell assembly and the housing assembly. The busbar is connected to the battery cell assembly and the first pull plate of the pull plate device, and / or the first pull plate is connected to the outer shell of the battery cell. In this way, the relative position of the battery cell assembly and the first pull plate is fixed, which alleviates the displacement between the first pull plate and the battery cell assembly during vibration and helps to reduce the wear of the battery cell assembly.

[0111] In view of this, embodiments of this application provide a battery device, the battery device comprising: a housing assembly for defining a receiving cavity, the housing assembly including a first wall; a battery cell group disposed within the receiving cavity, the battery cell group including a plurality of battery cells stacked along a first direction, the battery cells supported on the first wall; a pull plate device including at least one first pull plate, the first pull plate covering at least a portion of the terminal posts of the battery cell group from the side of the battery cell group away from the first wall; and a busbar located between the battery cell group and the first pull plate, the first pull plate being connected to the busbar and / or the housing of the battery cells.

[0112] In this embodiment, the first pull plate is connected to the busbar, which is electrically connected to the individual battery cells. This connection mitigates displacement of the battery cells within the battery pack during vibration, reducing wear on the battery pack. The first pull plate is also connected to the outer casing of the individual battery cells, further mitigating displacement and reducing wear on the battery pack. Additionally, the first pull plate provides protection for the busbar.

[0113] The technical solutions described in the embodiments of this application are applicable to electrical devices that use battery devices. The electrical device includes the battery device of any embodiment of this application, and the battery device is used to provide electrical energy.

[0114] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, aircraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Aircraft generally refer to devices that fly within or outside the atmosphere (space), including aircraft flying within the atmosphere and spacecraft flying in space. Aircraft can include airplanes, airships, etc., for example, low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional aircraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of this application do not impose any special limitations on the above-mentioned electrical devices.

[0115] It should be noted that the technical solutions described in the embodiments of this application are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices that include battery devices. However, for the sake of brevity, the following embodiments are all described using aircraft as examples.

[0116] Reference Figure 1 The aircraft 1000 typically includes a battery unit 100 and an airframe, with the battery unit 100 located in the airframe and providing electrical power to the airframe.

[0117] Reference Figure 2 To meet different power demands, the battery device 100 includes a battery cell group 10, which may include multiple battery cells 11. These multiple battery cells 11 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that some of the multiple battery cells 11 are connected in series while others are connected in parallel. The multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 11 is housed within a housing. Alternatively, the battery device 100 can also consist of multiple battery cells 11 first connected in series, parallel, or in a mixed configuration to form modules, and then these modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within a housing assembly.

[0118] Reference Figures 3-12 This application provides a battery device 100, which includes a battery cell assembly 10, a housing assembly 2, and a fiber composite pull plate 3. The battery cell assembly 10 includes a plurality of battery cells 11 stacked along a first direction. The housing assembly 2 defines a receiving cavity in which the battery cell assembly 10 is disposed. The fiber composite pull plate 3 includes a main body portion 3a and a connecting portion 3b, which are located at opposite ends of the main body portion 3a along the first direction. The housing assembly 2 includes two side beams 21 arranged opposite each other along the first direction, which constrain the battery cell assembly 10. The connecting portion 3b is connected to the side beams 21.

[0119] The box assembly 2 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or it can be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres.

[0120] The housing assembly 2 defines a receiving cavity in which the battery cell pack 10 is disposed. The battery cell pack 10 is mounted to the electrical device via the housing assembly 2. As an example, the housing assembly 2 is typically a cuboid structure. Both the length and width directions of the housing assembly 2 are parallel to the horizontal plane, and the length direction of the housing assembly 2 is parallel to the longest side of its cuboid structure. The height direction of the housing assembly 2 is perpendicular to the ground.

[0121] The battery cell group 10 includes a plurality of battery cells 11 stacked along a first direction. The battery device 100 may include only one battery cell group 10 or multiple battery cell groups 10. The multiple battery cell groups 10 are distributed along a second direction to form a battery cell array 1.

[0122] Here, the first direction and the second direction intersect. Taking the box assembly 2 as a cuboid as an example, one of the first direction and the second direction can be the length direction of the box assembly 2, and the other can be the width direction of the box assembly 2.

[0123] As an example, the large surface of the battery cell 11 is perpendicular to the first direction, and the large surfaces of adjacent battery cells 11 in the battery cell group are directly or indirectly connected along the first direction. Specifically, the large surface here refers to the surface with the largest area among all the surfaces of the battery cell 11.

[0124] The housing assembly 2 includes two side beams 21 arranged opposite each other along a first direction. The side beams 21 are specifically used to constrain the battery cell group 10 and bear the expansion force from the battery cells 11. The side beams 21 may directly or indirectly abut against the battery cells 11, or a gap may be formed between the side beams 21 and the battery cells 11, which is not limited.

[0125] As an example, in addition to the side beams 21, the housing assembly 2 may also include a first wall 22, with the two side beams 21 respectively connected to opposite ends of the first wall 22 along a first direction.

[0126] The first wall 22 is used to support the battery cell 11. Specifically, "supporting" here means bearing the weight of the battery cell 11; that is, the first wall 22 is located on the bottom side of the battery cell 11 along the direction of gravity. The thickness direction of the first wall 22 is the third direction. Taking the housing assembly 2 as an example of a cuboid structure, the third direction is the height direction of the housing assembly 2, which is also the height direction of the battery cell 11. In some embodiments, the first direction, the second direction, and the third direction are perpendicular to each other.

[0127] Furthermore, the housing assembly 2 may also include two side plates 23 disposed opposite to each other along the second direction. The two side plates 23 are respectively connected to the opposite ends of the first wall 22 along the second direction, and the opposite ends of the side beam 21 along the second direction are respectively connected to the two side plates 23. The side plates 23 are specifically used to constrain the battery cell pack 10 along the second direction.

[0128] The battery device 100 also includes a fiber composite tension plate 3, which includes a main body 3a and a connecting part 3b. The connecting part 3b is located at both ends of the main body 3a along the first direction and is connected to the side beam 21.

[0129] Here, fiber composite sheet 3 specifically refers to a structure in which at least a portion of the fiber composite sheet 3 is made of fiber composite material.

[0130] As an example, the fiber composite material of the fiber composite plate 3 includes a reinforcing phase and a matrix phase. The matrix phase bonds the reinforcing phase together, making the reinforcing phase and matrix phase form a whole, thereby giving the composite material continuity and integrity. The reinforcing phase is used to improve the strength and stiffness of the composite material, thereby enhancing its mechanical properties.

[0131] The reinforcing phase includes fibers selected from at least one of glass fibers, basalt fibers, and aramid fibers, while the matrix phase includes at least one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin. This gives the fiber composite sheet 3 good structural strength and insulation properties (the fiber composite sheet 3 may directly or indirectly contact the battery cell 11). In some examples, at least a portion of the fibers in the fiber composite material of the fiber composite sheet 3 are continuous fibers, and in the main body 3a, the fibers extend along a first direction; that is, at least a portion of the fibers in the fiber composite sheet 3 are formed as unidirectional bands, thereby improving the structural strength of the fiber composite sheet 3 along the first direction.

[0132] The main body 3a may be the portion that contacts the fiber composite tension plate 3 with the battery cell 11 and / or limits the position of each battery cell 11 in the battery cell group 10. The main body 3a may be in direct or indirect contact with the battery cell 11. Alternatively, the main body 3a may not be in contact with the battery cell 11.

[0133] One or more surfaces of the battery cell pack 10 may be provided with the main body portion 3a. Here, the surface of the battery cell pack 10 may be a surface that is away from the first wall 22 along the first direction, or it may be a surface along the first direction or the second direction.

[0134] As an example, the surface of the battery cell assembly 10 facing away from the first wall 22 and the surface of the battery cell assembly 10 along the second direction are both provided with a main body portion 3a.

[0135] The connecting part 3b is the part that connects the fiber composite pull plate 3 to the box assembly 2. The connection between the connecting part 3b and the box assembly 2 can be welding, bonding, threaded connection, snap-fit, riveting, etc.

[0136] The connecting part 3b can be connected to any position of the side beam 21, such as the side of the side beam 21 facing the battery cell 11 in the first direction, the side of the side beam 21 away from the battery cell 11 in the first direction, the side of the side beam 21 away from the first wall 22 in the third direction, etc.

[0137] In the battery device 100 of this embodiment, a fiber composite tension plate 3 is provided. The connecting portions 3b at both ends of the fiber composite tension plate 3 along the first direction are connected to the side beams 21 of the housing assembly 2, so that part of the expansion force borne by the side beams 21 can be transmitted to the fiber composite tension plate 3. In other words, the fiber composite tension plate 3 can share the expansion force of the battery cell 11 with the side beams 21, thereby improving the modulus and strength of the housing assembly 2, especially improving the modulus of the housing assembly 2 along the first direction, and reducing the probability of bending deformation of the side beams 21 and / or reducing the amount of deformation when bending deformation occurs. Furthermore, the fiber composite tension plate 3 is made of fiber composite material, which is lightweight and has high strength. This is beneficial for improving the structural strength of the housing assembly 2 while reducing the weight of the battery device 100 and increasing the energy density of the battery device 100.

[0138] In some embodiments, refer to Figure 2 and Figure 6 The housing assembly 2 includes a first wall 22, on which battery cells 11 are supported, and side beams 21 are connected to opposite ends of the first wall 22 along a first direction. The fiber composite pull plate 3 includes at least one first pull plate 31, which covers at least a portion of the terminal posts 112 of the battery cell assembly 10 from the side opposite to the first wall 22.

[0139] It should be noted that the first pull plate 31 covering the battery cell group 10 can be a part of the battery cell group 10 covered by the first pull plate 31, that is, when projected along a third direction, the projection of the first pull plate 31 overlaps with the projection of the battery cell group 10; or the first pull plate 31 covering the entire battery cell group 10, that is, when projected along a third direction, the projection of the first pull plate 31 overlaps with the projection of the battery cell group 10 as a whole.

[0140] Furthermore, the first pull plate 31 can cover one or more battery cell groups 10. In some examples, the housing assembly 2 is provided with multiple battery cell groups 10, which are distributed along the second direction to form a battery cell array 1. Adjacent battery cell groups 10 in the battery cell array 1 share a first pull plate 31. Alternatively, in other examples, the first pull plate 31 partially or completely covers a single battery cell group 10.

[0141] In this embodiment, the first pull plate 31 covers the terminal post 112 side of the battery cell assembly 10 from the side away from the first wall 22, and can provide a limit for the battery cell assembly 10 in the thickness direction (i.e., the third direction) of the first wall 22 so as to fix the battery cell assembly 10 to the housing assembly 2. The first pull plate 31 can also resist the expansion force of the battery cell 11 along the thickness direction (i.e., the third direction) of the first wall 22.

[0142] In some embodiments, the first pull plate 31 forms an insulating layer on the side facing the battery cell 11.

[0143] Here, the fibers and substrates used in the fiber composite material of the fiber composite plate 3 can be insulating materials. For example, the fibers are selected from glass fiber, basalt fiber, aramid fiber, etc., and the substrates are selected from polyurethane, epoxy resin, phenolic resin, polyamide resin, ceramicizable resin, etc., so that the fiber composite plate 3 is formed as an insulating structure, thereby forming an insulating layer on the side of the fiber composite plate 3 facing the battery cell 11.

[0144] Alternatively, the fibers used in the fiber composite material of the fiber composite sheet 3 can be non-insulating fibers, such as carbon fiber. The side of the fiber composite sheet 3 facing the battery cell 11 can form an insulating layer by coating with insulating materials, electroplating with insulating materials, or hot-pressing with insulating film.

[0145] Here, the side of the first pull plate 31 facing the battery cell 11 may include the main body 3a of the first pull plate 31 facing the battery cell 11, or it may include the connecting part 3b of the first pull plate 31 facing the battery cell 11.

[0146] In this embodiment, since the first pull plate 31 may come into direct or indirect contact with the battery cell 11, an insulating layer is formed on the side of the first pull plate 31 facing the battery cell 11, thereby improving the reliability of the battery device 100.

[0147] In some embodiments, refer to Figure 6 The battery device 100 also includes a busbar 4, which is located between the battery cell group 10 and the first pull plate 31, and the first pull plate 31 is bonded to the busbar 4.

[0148] Here, the busbar 4 can be used as a conductive component to electrically connect multiple battery cells 11, and to collect and transmit the current between the battery cells 11 to an external circuit, or to distribute the current input from the external circuit to each battery cell 11.

[0149] The busbar 4 can be made of rigid material or flexible material. The busbar 4 can be used for electrical connection of battery cells 11 in battery cell group 10, or to connect battery cells 11 in battery cell array 1 in a row.

[0150] In this embodiment, the busbar 4 is bonded to the first pull plate 31, which helps to improve the connection strength and connection area between the first pull plate 31 and the battery cell assembly 10. On the other hand, the first pull plate 31 can also insulate the busbar 4 from the external space, thereby improving the insulation performance of the battery device 100. The first pull plate 31 can also provide protection for the busbar 4, reducing the possibility of the busbar 4 cracking due to deformation or disconnecting from the battery cell 11.

[0151] In some embodiments, refer to Figure 4 , Figure 6 , Figure 9 The battery device 100 also includes a sampling component 5, which is located between the first pull plate 31 and the battery cell group 10. The sampling component 5 has at least one output component 51. The first pull plate 31 is provided with an avoidance notch 31a, which is positioned corresponding to the output component 51.

[0152] Here, the sampling component 5 can be used to detect parameters such as voltage, current, and temperature of the battery cell 11 or battery cell group 10. The output component 51 is used to electrically connect to an external controller, thereby outputting the data collected by the sampling component 5 to the external controller. The output component 51 can be a conductive post, conductive sheet, conductive wire, etc.

[0153] The first pull plate 31 includes a clearance notch 31a corresponding to the output member 51. The shape and position of the clearance notch 31a can be determined according to the specific shape and position of the output member 51. The clearance notch 31a can be a groove provided on the edge of the first pull plate 31 along the first direction, or it can be a hole opened in the first pull plate 31. The clearance notch 31a can be provided on the main body 3a and / or the connecting part 3b of the first pull plate 31.

[0154] In this embodiment, the avoidance notch 31a can avoid the output component 51, improve the structural compactness of the housing assembly 2, optimize the stress distribution of the first pull plate 31, and thus improve its structural strength.

[0155] In some embodiments, still refer to Figure 6 The side beam 21 has at least one clearance groove 21a, and the output member 51 is at least partially located in the clearance groove 21a.

[0156] Here, the specific position and shape of the clearance groove 21a can be determined according to the position and structure of the output member 51. It is only necessary to ensure that the output member 51 can extend through the clearance groove 21a to the side of the side beam 21 away from the receiving cavity.

[0157] In this embodiment, the side beam 21 may have one or more clearance grooves 21a. The clearance grooves 21a may correspond to a single output component 51 or multiple output components 51. In some examples, the side beam 21 is provided with multiple clearance grooves 21a along the second direction, and the clearance grooves 21a, output components 51 and battery cell packs 10 are correspondingly provided.

[0158] In this embodiment, by forming at least one clearance groove 21a in the side beam 21, the arrangement requirements of the sampling component 5 in the battery device 100 can be met, which facilitates the connection of the output component 51 with the external controller, and also improves the structural compactness of the housing component 2 and saves the internal space of the housing component 2.

[0159] In some embodiments, refer to Figure 6 The first pull plate 31 is connected to the side of the side beam 21 away from the battery cell 11 along the first direction. The battery device 100 includes a mounting bracket (not shown in the figure) for mounting electrical components. The mounting bracket is connected to the first pull plate 31 away from the side beam 21 along the first direction.

[0160] The mounting bracket is used to mount electrical components. The specific structure of the electrical components is not limited, but specifically refers to components used to control the battery cell 11. As an example, the electrical component includes a circuit board on which a control unit, including but not limited to a cell supervision circuit (CSC), is integrated. The electrical components can be electrically connected to the busbar 4 and / or the sampling component 5.

[0161] In this embodiment, the connecting part 3b of the first pull plate 31 and the mounting bracket are both located outside the receiving cavity of the housing assembly 2. This helps to save the internal space of the housing assembly 2 and increase the energy density of the battery device 100.

[0162] In some embodiments, a plurality of battery cell groups 10 are arranged along a second direction to form a battery cell array 1, the second direction intersecting with a first direction; the fiber composite sheet 3 includes at least one second sheet 32, the second sheet 32 ​​covering at least a portion of the battery cell array 1 along the second direction.

[0163] Here, the second pull plate 32 covers at least a portion of the battery cell array 1 along the second direction. This can be a projection along the second direction, where the projection of the second pull plate 32 partially overlaps with the projection of the battery cell array 1; or, the projection of the second pull plate 32 completely overlaps with the projection of the battery cell array 1.

[0164] As an example, there are at least two second pull plates 32, which cover both sides of the battery cell array 1 along the second direction.

[0165] In this embodiment, the second pull plate 32 can cover at least a portion of the battery cell array 1 along the second direction, thereby bearing the expansion force of the battery cell 11 along the second direction, further improving the modulus and strength of the housing assembly 2 along the second direction, and the second pull plate 32 is connected to the side beam 21, which can further improve the deformation constraint force on the side beam 21, thereby further improving the structural strength of the housing assembly 2.

[0166] In some embodiments, refer to Figure 5 and Figure 6The housing assembly 2 includes a first wall 22, on which the battery cell 11 is supported. Multiple side walls include two side plates 23, which are disposed at opposite ends of the first wall 22 along a second direction. The side plates 23 are used to constrain the battery cell assembly 10. A second pull plate 32 is located on the side of the side plate 23 away from the first wall 22 along the thickness direction (i.e., the third direction) of the first wall 22.

[0167] As an example, along the third direction, one end of the second pull plate 32 near the side plate 23 is connected to the side plate 23, or, the end of the second pull plate 32 near the side plate 23 forms a gap with the side plate 23. In some examples, when projected onto the same projection plane along the second direction, the projection of the second pull plate 32 and the projection of the side plate 23 together cover the projection of the battery cell array 1.

[0168] It is understandable that if the battery cell array 1 only has the second pull plate 32 on both sides along the second direction without the side plate 23, the second pull plate 32 would need to have a large thickness to provide constraint force for the battery cell assembly 10, resulting in increased cost and weight. If the battery cell array 1 only has the side plate 23 on both sides along the second direction without the second pull plate 32, the side plate 23 might need a large volume (for example, the top surface of the side plate 23 might need to be flush with the top surface of the battery cell 11), which would also lead to increased cost and weight. In this embodiment, the second pull plate 32 and the side plate 23 cooperate to jointly constrain the battery cell assembly 10. In this way, while meeting the structural strength requirements of the housing assembly 2, the weight and manufacturing cost of the housing assembly 2 can be reduced as much as possible, and the energy density can be improved.

[0169] In some embodiments, refer to Figure 7 and Figure 8 The side beam 21 includes an insulating structural layer 2a and a fiber composite material layer 2b stacked together, with at least a portion of the insulating structural layer 2a located between the fiber composite material layer 2b and the battery cell 11.

[0170] Here, the insulating structure layer 2a and the fiber composite material layer 2b are stacked, specifically, both the insulating structure layer 2a and the fiber composite material layer 2b are plate-shaped structures. When projected along the thickness direction of the plate-shaped structure, the projections of the insulating structure layer 2a and the fiber composite material layer 2b overlap at least partially, so that the insulating structure layer 2a and the fiber composite material layer 2b are stacked together to form an integral laminate.

[0171] It should be noted that, in addition to the side beam 21, other structural walls of the enclosure (e.g., the first wall 22), structural beams, and structural panels (e.g., side panels 23) can also adopt similar structures. Taking the side beam 21 as an example, the insulating structural layer 2a and the composite material layer included in the side beam 21 can be integrally bonded together, or they can be partially connected, forming gaps or cavities in some locations. Furthermore, the side beam 21 can also include one or more laminates, or be formed by bending a laminate to create different wall surfaces of the side beam 21.

[0172] In this embodiment and in other embodiments mentioned below, the insulating structure layer 2a can be made of a single material, or it can be made of fiber composite material or other composite materials. The fiber composite material layer 2b is made of fiber composite material.

[0173] The main difference between the insulating structural layer 2a and the fiber composite layer 2b is that the insulating structural layer 2a is insulating at least on the side surface facing the battery cell 11, while the fiber composite layer 2b may be non-insulating, or it may be partially or completely insulating.

[0174] In an example where both the insulating structure layer 2a and the fiber composite material layer 2b are made of fiber composite materials, the fibers in the insulating structure layer 2a and the fiber composite material layer 2b can be the same, such as at least one of glass fiber, basalt fiber, aramid fiber, ceramic fiber, carbon fiber, and polyethylene fiber. In this embodiment, if the fibers in the fiber composite material layer 2b of the insulating structure layer 2a include carbon fiber or other conductive fibers, an insulating coating can be applied to the surface of the insulating structure layer 2a facing the battery cell 11 to achieve insulation.

[0175] The fibers in the insulating structural layer 2a and the fiber composite material layer 2b can also be different. For example, the fibers of the fiber composite material in the insulating structural layer 2a may include at least one of glass fiber, basalt fiber, and aramid fiber. All of these fibers are insulating fibers. Therefore, in this embodiment, the insulating structural layer 2a may not require an insulating coating. The fibers of the fiber composite material in the fiber composite material layer 2b may include at least one of carbon fiber and polyethylene fiber.

[0176] The insulating structure layer 2a is located between the fiber composite material layer 2b and the battery cell 11. That is, the insulating structure layer 2a is located on the side of the first wall 22 facing the battery cell 11. Specifically, the insulating structure layer 2a can be provided as a whole on the side of the first wall 22 facing the battery cell 11, or the insulating structure layer 2a can be provided only on a part of the side of the first wall 22 facing the battery cell 11. It can be understood that the insulating layer provided as a whole has a better insulation effect.

[0177] In this embodiment, the side beam 21 includes an insulating structural layer 2a and a fiber composite material layer 2b stacked together. The fiber composite material layer 2b provides good structural strength. The insulating structural layer 2a is located between the fiber composite material layer 2b and the battery cell 11. The insulating structural layer 2a is used to support the battery cell 11 and also to electrically isolate the battery cell 11 from the outside world, reducing external interference to the battery cell 11. The combination of the insulating structural layer 2a and the fiber composite material layer 2b allows the housing assembly 2 to take into account both structural strength and protective performance.

[0178] In some embodiments, the side beam 21 is configured as a hollow structure having a hollow cavity 211 (not shown in the figure); the hollow cavity 211 is located between the insulating structural layer 2a and the fiber composite material layer 2b of the side beam 21.

[0179] The hollow cavity 211 formed by the side beam 21 can be formed by multiple layers of the side beam 21 enclosing each other to form a hollow structure, or it can be formed by the insulating structure layer 2a and the fiber composite material layer 2b of the side beam 21 enclosing each other to form a hollow structure.

[0180] The technical solution of this application embodiment, by setting the hollow cavity 211, can effectively reduce the weight of the side beam 21, which is beneficial to the lightweighting of the housing assembly 2. In addition, the hollow cavity 211 can also serve as a heat insulation layer, improving the thermal management performance of the battery device 100. The structure of the hollow cavity 211 can be flexibly set to adapt to different design requirements.

[0181] In some embodiments, the side beam 21 further includes a support structure 212 located in the hollow cavity 211 and abutting against at least one of the insulating structural layer 2a and the fiber composite material layer 2b of the side beam 21.

[0182] The supporting structure 212 can be a columnar structure, a ribbed structure, a shell structure, a plate structure, a mesh structure, a honeycomb structure, a filled structure, etc. One or more supporting structures 212 can be provided in the hollow cavity 211.

[0183] The support structure 212 can abut against the insulating structure layer 2a, or against the fiber composite material layer 2b, or one side of the support structure 212 abuts against the insulating structure layer 2a, and the other side of the support structure 212 abuts against the fiber composite material layer 2b.

[0184] The support structure 212 can also be connected to the corresponding insulating structure layer 2a and fiber composite material layer 2b by means of snap-fit, bonding, welding, fastener connection, riveting, etc., thereby improving the connection strength.

[0185] In this embodiment, a support structure 212 is provided in the hollow cavity 211. The support structure 212 provides support for the insulation layer 2a and the fiber composite material layer 2b, which can improve the deformation resistance of the insulation layer 2a and the fiber composite material layer 2b. The support structure 212 can also disperse impacts and improve the structural stability of the box assembly 2.

[0186] In some embodiments, refer to Figure 7 and Figure 8 The support structure 212 includes a first support body 213, which has a support plate 2131 facing the insulating structure layer 2a. The first direction is the thickness direction of the support plate 2131, and the support plate 2131 abuts against the insulating structure layer 2a along the first direction.

[0187] The first support 213 is used to provide support along the first direction. The first support 213 can be a block structure, column structure, plate structure or a combination of multiple structures.

[0188] The first direction can be the direction perpendicular to the large surface area of ​​the battery cell 11. In some examples, the large surface area of ​​the battery cell 11 is relatively large, making it prone to thermal expansion and deformation. In this case, the first direction is the direction in which the expansion force of the battery cell 11 is greater. The first support 213 is used to limit the deformation of the battery cell 11 caused by the expansion force.

[0189] The support plate 2131 abuts against the insulating structure layer 2a, which can be partial abutment or the surface of one side of the support plate 2131 can be fully attached to the surface of the insulating structure layer 2a.

[0190] In some examples, the support plate 2131 can also be connected to the corresponding insulating structure layer 2a. The support plate 2131 and the corresponding insulating structure layer 2a can be connected by means of snap-fit, bonding, welding, fastener connection, riveting, etc.

[0191] In this embodiment, the first support 213 includes a support plate 2131. The support surface of the support plate 2131 abuts against the insulating structure layer 2a, providing good support for the insulating structure layer 2a. The abutting direction of the support plate 2131 is along the first direction, which can effectively limit the deformation of the battery cell 11 caused by the expansion force in the first direction and improve the structural stability of the housing assembly 2.

[0192] In some embodiments, still refer to Figure 7 and Figure 8The first support 213 also includes an extension plate 2132 connected to the support plate 2131. The extension plate 2132 is connected to the side of the support plate 2131 facing the battery cell 11 and extends along the first direction. The extension plate 2132 is connected to the first wall 22 and projects onto the same projection plane along the thickness direction of the first wall 22. The projection of the extension plate 2132 overlaps with the projection of at least a portion of the battery cell 11.

[0193] Here, the specific structural form of the first wall 22 is not limited. The relative positional relationship between the extension plate 2132 and the first wall 22 is not limited. For example, the extension plate 2132 may be located on the side of the first wall 22 facing the battery cell 11 or away from the battery cell 11 along the thickness direction (i.e., the third direction). Alternatively, the first wall 22 may be formed as a structure with a cavity, and at least a portion of the extension plate 2132 may be located within the cavity of the first wall 22.

[0194] The connection method between the extension plate 2132 and the first wall 22 is not limited. For example, they can be connected by means of bonding, welding, snap-fitting, fastener connection, etc. Alternatively, the extension plate 2132 and the first wall 22 can form an integral structure, or the extension plate 2132 and the first wall 22 can only abut against each other without being fixedly connected.

[0195] The extension plate 2132 is connected to the support plate 2131. The two can form an integral structure, or they can be connected by means of bonding, welding, snap-fitting, fastener connection, etc. In some examples, the extension plate 2132 and the support plate 2131 form an integral structure and extend in different directions.

[0196] The extension plate 2132 can extend specifically along a first direction, and the specific length range of the extension plate 2132 extending along the first direction is not limited. As an example, when projected onto the same projection plane along the thickness direction (i.e., the third direction) of the first wall 22, the projection of the extension plate 2132 overlaps with the projection of 3-5 battery cells 11. As another example, the extension plates 2132 at corresponding positions of the first supports 213 of the two side beams 21 are interconnected.

[0197] In this embodiment, the extension plate 2132 can, on the one hand, jointly support the battery cell 11 with the first wall 22, thereby enhancing the support capacity of the housing assembly 2. On the other hand, the extension plate 2132 helps to balance the force on the support plate 2131, reduce the probability of the support plate 2131 tilting and deforming, and thus improve the deformation resistance of the side beam 21, meeting the expansion resistance requirements of the side beam 21.

[0198] In some embodiments, refer to Figure 7 The first support 213 also includes a reinforcing structure 2133 disposed on the side of the support plate 2131 away from the battery cell 11 along the first direction.

[0199] Here, the specific structural form of the reinforcing structure 2133 is not limited. As an example, the reinforcing structure 2133 includes one or more reinforcing ribs.

[0200] The reinforcement structure 2133 is connected to the support plate 2131. The two can form an integral structure, or they can be connected by means of bonding, welding, snap-fitting, fastener connection, etc.

[0201] In this embodiment, by providing a reinforcing structure 2133 on the side of the support plate 2131 away from the battery cell 11 along the first direction, the structural strength of the support plate 2131 can be further improved, thereby enhancing the deformation resistance of the side beam 21.

[0202] In some embodiments, the support structure 212 further includes a second support 214 located between the support plate 2131 and the fiber composite material layer 2b, the second support 214 including a foam layer; or, the second support is configured as a fiber composite material shell with an opening at at least one end facing the support plate 2131.

[0203] The second support 214 is used to provide support, and the second support 214 can be a block structure, column structure, plate structure or a combination of multiple structures.

[0204] The second support 214 is located between the support plate 2131 and the fiber composite material layer 2b. The second support 214 may be connected to the support plate 2131, or the second support 214 may be connected to the fiber composite material; or the second support 214 may be connected to both the support plate 2131 and the fiber composite material.

[0205] The second support 214 can be installed independently on the side beam 21, or it can cooperate with the first support 213. In some examples, the second support 214 and the first support 213 abut against each other.

[0206] The second support 214 includes a foam layer, which provides good support and is lightweight; the first support 213 is made of the same material as the fiber composite material layer 2b.

[0207] In some examples, the foam layer can be one or more of polyurethane foam, polystyrene foam, polypropylene foam, or metal foam. The support ribs of the first support 213 can be embedded in the foam layer.

[0208] In some examples, the second support 214 constitutes a fiber composite shell, which may be made of fiber-reinforced composite material. The fiber composite shell may include one or more chambers, each with an opening facing the support plate 2131, so that the second support 214 and the first support 213 cooperate to form a structure that closes the chambers.

[0209] In this embodiment, the multiple chambers of the fiber composite shell can adopt the same or different structures, and the multiple chambers can be distributed along a rectangular or circular array.

[0210] In this embodiment, the second support 214 enhances the structural strength of the side beam 21, and can also cooperate with other support structures 212 of the side beam 21 to further improve its structural strength. The second support 214 formed by the foam layer can mitigate impact, providing good support, and is lightweight, facilitating the lightweighting of the box structure. The second support 214 formed by the fiber composite shell has good structural strength and can also provide thermal insulation and corrosion resistance properties based on the matrix phase. The open cavity can reduce weight, facilitating the lightweighting of the box structure.

[0211] In the embodiment where the aforementioned side beam includes a layered fiber composite material layer 2b and an insulating structural layer 2a, refer to Figure 6 , Figure 9 and Figure 10 The fiber composite sheet 3 includes a bending part 3c, which connects the main body part 3a and the connecting part 3b. The connecting part 3b is connected to one side surface of the side beam 21 along the first direction, and an adhesive is provided between the connecting part 3b and the side beam 21.

[0212] Here, the bent portion 3c specifically refers to the section located between the main body portion 3a and the connecting portion 3b where a bend occurs. As an example, the bent portion 3c has a curved surface, and the boundary of this curved surface is the boundary of the bent portion 3c. The specific angle of the bend between the main body portion 3a and the connecting portion 3b is not limited. As an example, the included angle between the surface of the main body portion 3a along the thickness direction and the surface of the connecting portion 3b along the thickness direction can be 80°-110°.

[0213] The bent portion 3c can be integrated with the main body 3a and the connecting portion 3b into a single structure. In actual manufacturing, the main body 3a, the bent portion 3c, and the connecting portion 3b can be formed by compression molding, that is, the fiber composite material is placed in a mold cavity at the molding temperature, and then the mold is closed and pressure is applied to shape and solidify it. Alternatively, a flat structure can be manufactured first, and then shaped into the first tension plate 31.

[0214] As mentioned above, the fiber composite pull plate 3 may include a first pull plate 31 and a second pull plate 32. In this embodiment, only the first pull plate 31 may have a bending portion 3c, only the second pull plate 32 may have a bending portion 3c, or both the first pull plate 31 and the second pull plate 32 may have a bending portion 3c.

[0215] An adhesive is provided between the connecting part 3b and the side beam 21. That is, the connecting part 3b and the side beam 21 are fixed by adhesive bonding. The specific composition, coating thickness and coating area of ​​the adhesive are not limited, as long as they can meet the fixing strength requirements.

[0216] In this embodiment, the connecting portion 3b of the fiber composite pull plate 3 is bent relative to the main body portion 3a to connect to one side surface of the side beam 21 along the first direction. This helps to increase the connection area between the connecting portion 3b and the side beam 21, allowing the expansion force borne by the side beam along the first direction to be better transmitted to the fiber composite pull plate 3, thereby further improving the modulus and strength of the housing along the first direction. Furthermore, the connecting portion 3b of the fiber composite pull plate 3 is fixed to the side beam 21 by adhesive bonding. This minimizes or at least reduces the number of holes drilled in the fiber composite layer and / or insulation layer 2a of the side beam 21, improving the sealing performance and structural strength of the side beam 21.

[0217] In some embodiments, the connecting portion 3b is connected to the side surface of the side beam 21 facing away from the battery cell 11 along a first direction.

[0218] Here, only the connecting part 3b of the first pull plate 31 can be connected to the side surface of the side beam 21 facing away from the battery cell 11 along the first direction, or only the connecting part 3b of the second pull plate 32 can be connected to the side surface of the side beam 21 facing away from the battery cell 11 along the first direction, or both the connecting parts 3b of the first pull plate 31 and the second pull plate 32 can be connected to the side surface of the side beam 21 facing away from the battery cell 11 along the first direction.

[0219] In this embodiment, the connecting part 3b is connected to the side surface of the side beam 21 that is away from the battery cell pack 10 along the first direction, rather than the side surface that faces the battery cell pack 10. This helps to preferentially transfer the expansion force to the side beam 21 (which has higher strength in comparison), and also helps to save the internal space of the housing assembly 2 and improve the energy density.

[0220] In some embodiments, refer to Figure 4 and Figure 6 The connecting part 3b has a first positioning structure 3d, and the side beam 21 has a second positioning structure 21b. The first positioning structure 3d and the second positioning structure 21b are connected in cooperation.

[0221] In this embodiment, the first positioning structure 3d and the second positioning structure 21b can position and pre-fix the connecting part 3b and the side beam 21 before the colloid between the connecting part 3b and the side beam 21 is completely cured, reducing the possibility of the connecting part 3b and the side beam 21 shifting to each other before the colloid is cured, thereby improving the positioning accuracy and connection strength of the connecting part 3b and the side beam 21 and reducing the assembly difficulty.

[0222] The specific structural forms of the first positioning structure 3d and the second positioning structure 21b are not limited, as long as they can be connected.

[0223] The specific positions of the first positioning structure 3d and the second positioning structure 21b are not limited. As an example, at least one second positioning structure 21b can be provided at each of the opposite ends in the length direction of the side beam 21, and the first positioning structure 3d can be provided at the corresponding position of the connecting part 3b.

[0224] In some embodiments, one of the first positioning structure 3d and the second positioning structure 21b is a hole structure, and the other is a protrusion structure, with the protrusion structure located within the hole structure. Alternatively, both the first positioning structure 3d and the second positioning structure 21b are hole structures, with an external connecting structure passing through the first positioning structure 3d and the second positioning structure 21b.

[0225] In an embodiment where one of the first positioning structure 3d and the second positioning structure 21b is a hole structure and the other is a protrusion structure, preferably, the second positioning structure 21b is a protrusion structure to reduce the number of holes drilled in the side beam 21.

[0226] In embodiments where both the first positioning structure 3d and the second positioning structure 21b are hole structures, the external positioning structure can be a screw, rivet, etc. It is understood that since the first positioning structure 3d and the second positioning structure 21b are used for positioning and pre-fixing, their number is relatively small, and setting them as hole structures will not have a significant adverse impact on the sealing performance of the housing. As an example, one or two second positioning structures 21b can be provided at each of the opposite ends of the side beam 21 along its length.

[0227] In this embodiment, the first positioning structure 3d and the second positioning structure 21b can improve the positioning accuracy and reduce the possibility of mutual displacement between the connecting part 3b and the side beam 21 after the first positioning structure 3d and the second positioning structure 21b are connected.

[0228] In some embodiments, the housing assembly 2 includes a first wall 22, on which the battery cell 11 is supported. The first wall 22 includes an insulating structure layer 2a and a fiber composite material layer 2b stacked together. Along the thickness direction of the first wall 22, the insulating structure layer 2a is located between the fiber composite material layer 2b and the battery cell 11.

[0229] Here, the insulating structure layer 2a and the fiber composite material layer 2b are stacked, specifically, both the insulating structure layer 2a and the fiber composite material layer 2b are plate-shaped structures. When projected along the thickness direction of the plate-shaped structure, the projections of the insulating structure layer 2a and the fiber composite material layer 2b overlap at least partially, so that the insulating structure layer 2a and the fiber composite material layer 2b are stacked together to form an integral laminate.

[0230] As mentioned above, the insulating structural layer 2a can be made of a single material, or it can be made of fiber composite material or other composite materials. The fiber composite layer 2b is made of fiber composite material.

[0231] The main difference between the insulating structural layer 2a and the fiber composite layer 2b is that the insulating structural layer 2a is insulating at least on the side surface facing the battery cell 11, while the fiber composite layer 2b may be non-insulating, or it may be partially or completely insulating.

[0232] In an example where both the insulating structure layer 2a and the fiber composite material layer 2b are made of fiber composite materials, the fibers in the insulating structure layer 2a and the fiber composite material layer 2b can be the same, such as at least one of glass fiber, basalt fiber, aramid fiber, ceramic fiber, carbon fiber, and polyethylene fiber. In this embodiment, if the fibers in the fiber composite material layer 2b of the insulating structure layer 2a include carbon fiber or other conductive fibers, an insulating coating can be applied to the surface of the insulating structure layer 2a facing the battery cell 11 to achieve insulation.

[0233] The fibers in the insulating structural layer 2a and the fiber composite material layer 2b can also be different. For example, the fibers of the fiber composite material in the insulating structural layer 2a may include at least one of glass fiber, basalt fiber, and aramid fiber. All of these fibers are insulating fibers. Therefore, in this embodiment, the insulating structural layer 2a may not require an insulating coating. The fibers of the fiber composite material in the fiber composite material layer 2b may include at least one of carbon fiber and polyethylene fiber.

[0234] As mentioned above, in some embodiments, the side beam 21 includes an insulating structural layer 2a and a fiber composite material layer 2b stacked together. In this embodiment, the insulating structural layer 2a of the side beam 21 can be connected to the insulating structural layer 2a of the first wall 22, and / or the fiber composite material layer 2b of the side beam 21 can be connected to the fiber composite material layer 2b of the first wall 22. The specific implementation of the connection is not limited, such as bonding, welding, snap-fitting, etc., or the two can form an integral structure.

[0235] The insulating structure layer 2a is located between the fiber composite material layer 2b and the battery cell 11. That is, the insulating structure layer 2a is located on the side of the first wall 22 facing the battery cell 11. Specifically, the insulating structure layer 2a can be provided as a whole on the side of the first wall 22 facing the battery cell 11, or the insulating structure layer 2a can be provided only on a part of the side of the first wall 22 facing the battery cell 11. It can be understood that the insulating layer provided as a whole has a better insulation effect.

[0236] As mentioned above, in some embodiments, the side beam 21 includes a first support 213, which includes an extension plate 2132. In this embodiment, the extension plate 2132 may be specifically disposed between the insulating structural layer 2a and the fiber composite material layer 2b of the first wall 22, and the extension plate 2132 may be connected to at least one of the insulating structural layer 2a and the fiber composite material layer 2b of the first wall 22. This improves the positional stability of the extension plate 2132 and enhances the connection and integrity between the first wall 22 and the side beam 21, thus contributing to improved structural strength of the housing assembly 2.

[0237] In this embodiment, the insulating structure layer 2a is used to support the battery cell 11 and also to electrically isolate the battery cell 11 from the outside world, reducing external interference to the battery cell 11. The combination of the insulating structure layer 2a and the fiber composite material layer 2b helps the housing assembly 2 to take into account both structural strength and protective performance.

[0238] In some embodiments, the fiber composite sheet 3 is connected to the housing of the battery cell 11.

[0239] Here, the housing of the battery cell 11 includes, but is not limited to, the housing at the shoulder of the battery cell 11 and the housing on the side along the second direction. As an example, the first pull plate 31 is connected to the housing at the shoulder of the battery cell 11, and the second pull plate 32 is connected to the housing on the side along the second direction of the battery cell 11.

[0240] As mentioned above, in some embodiments, the first pull plate 31 is connected to the busbar 4. In this embodiment, the first pull plate 31 may also be further connected to the housing of the battery cell 11 exposed to the busbar 4.

[0241] In this embodiment, the fiber composite pull plate 3 is connected to the shell of the battery cell 11, which helps to improve the constraint force of the fiber composite pull plate 3 on the battery cell 11.

[0242] In some embodiments, an adhesive layer is provided on the side of the main body 3a facing the battery cell 11.

[0243] That is, the main body 3a is connected to the casing of the battery cell 11 by adhesive bonding. Here, the specific composition, thickness, and coating area of ​​the adhesive layer are not limited.

[0244] In this embodiment, it helps to improve the connection strength between the fiber composite sheet 3 and the casing of the battery cell 11 and reduce the connection difficulty.

[0245] In some embodiments, refer to Figure 10 and Figure 11As mentioned above, the fiber composite sheet 3 also includes a bending portion 3c, which connects the main body portion 3a and the connecting portion 3b. The thickness of the bending portion 3c is greater than the thickness of at least a portion of the main body portion 3a.

[0246] Here, the thickness of the bent portion 3c can be made greater than the thickness of at least part of the main body portion 3a by thickening the bent portion 3c during the manufacturing process. The material used for thickening the bent portion 3c can be a composite material or not.

[0247] As an example, during the manufacturing process, more composite material or other molding material can be provided at the position corresponding to the bending portion 3c in the molding die, thereby making the thickness of the bending portion 3c greater than the thickness of at least part of the main body portion 3a. As another example, a structure of uniform thickness can be prepared first, and then the thickening material can be attached to the position corresponding to the bending portion 3c.

[0248] It is understandable that the bending part 3c is subjected to more complex forces than the main body 3a. Therefore, in this embodiment, the bending part 3c is thickened, which can increase the modulus and strength of the bending part 3c, thereby improving the overall structural strength.

[0249] In some embodiments, the fiber composite sheet 3 includes a first substrate and a first fiber, wherein the first fiber is a continuous fiber and extends along a first direction in the main body portion 3a.

[0250] Here, the first fiber is formed as the reinforcing phase of the fiber composite material, and the first substrate is formed as the matrix phase of the fiber composite material. The specific selection of materials for both can be referred to the description in the relevant section above.

[0251] It is understood that in this embodiment, the first fiber is actually formed as a unidirectional fiber band structure.

[0252] In this embodiment, the first fiber in the fiber composite sheet 3 is configured to extend along the first direction, which can improve the modulus and strength of the fiber composite sheet 3 along the first direction, thereby improving the modulus and strength of the box assembly 2 along the first direction.

[0253] In some embodiments, the first fiber extends from one connecting portion 3b to another connecting portion 3b.

[0254] Here, the extension of the first fiber from one connecting portion 3b to another connecting portion 3b specifically means that the first fiber extends from one connecting portion 3b, through the main body portion 3a (and in some embodiments, through the bending portion 3c) to another connecting portion 3b.

[0255] In this embodiment, the main body 3a and the connecting part 3b are actually formed as an integral structure, which helps to further improve the structural strength of the fiber composite sheet 3.

[0256] In some embodiments, the first substrate includes at least one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin; and / or the first fiber includes at least one of glass fiber, basalt fiber, and aramid fiber.

[0257] In some examples, the first substrate is one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin; in other examples, the first substrate is composed of two or more of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin.

[0258] In some examples, the first fiber is either carbon fiber or polyethylene fiber; in other examples, the first fiber is a composite of carbon fiber and polyethylene fiber.

[0259] In some examples, the first substrate includes polyurethane, and the first fiber includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric composed of polyurethane and the first fiber has advantages such as high elasticity, abrasion resistance and high tear strength.

[0260] In some examples, the first substrate includes epoxy resin, and the first fiber includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric composed of epoxy resin and the first fiber has advantages such as good adhesion, high mechanical strength, and strong corrosion resistance.

[0261] In some examples, the first substrate includes phenolic resin, and the first fiber includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric composed of phenolic resin and the first fiber has advantages such as good heat resistance and good flame retardancy.

[0262] In some examples, the first substrate includes polyamide resin, and the first fiber includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric composed of polyamide resin and the first fiber has advantages such as high strength, good abrasion resistance, and good oil resistance.

[0263] In some examples, the first substrate includes a ceramizable resin, and the first fiber includes one or more of carbon fiber and polyethylene fiber. The first fiber fabric composed of the ceramizable resin and the first fiber has advantages such as good structural stability, high temperature resistance, and good flame retardancy.

[0264] In some examples, the first fiber includes carbon fiber, and the first substrate includes polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin. The first fiber fabric composed of carbon fiber and the first substrate has advantages such as high strength, low density, corrosion resistance, and good thermal stability.

[0265] In some examples, the first fiber includes polyethylene fiber, and the first substrate includes polyurethane, epoxy resin, phenolic resin, polyamide resin, ceramizable resin, etc. The first fiber fabric composed of polyethylene fiber and the first substrate has advantages such as high strength and toughness, low density, and easy processing.

[0266] The technical solution of this application embodiment has the characteristics of lightweight and high strength in the fiber composite material formed by the first substrate and the first fiber, which is beneficial to reduce the weight of the fiber composite plate 3 and improve the structural strength of the fiber composite plate 3.

[0267] In some embodiments, the fiber composite sheet 3 includes a second fiber, which is a woven fiber, and the second fiber and the first fiber are stacked together along the thickness direction of the fiber composite sheet 3.

[0268] Here, the second fiber and the first fiber can be the same type of fiber, the only difference being that the first fiber is a continuous fiber and the second fiber is a woven fiber. The second fiber and the first fiber may also be different types of fibers.

[0269] The second fiber can be located on the side of the first fiber facing the battery cell 11 along the thickness direction of the fiber composite sheet 3, or it can be located on the side away from the battery cell 11, or at least a portion of the second fiber can be located between the two layers of the first fiber.

[0270] The first fiber and the second fiber can be stacked only in a part of the fiber composite sheet 3 (e.g., the part corresponding to the bending part 3c), while only the first fiber is provided in another part of the part (e.g., the part corresponding to the main body part 3a and the connecting part 3b), thus achieving local thickening of the fiber composite sheet 3.

[0271] It is understandable that both the first fiber and the second fiber are bonded together with the help of the first substrate.

[0272] It is understood that in this embodiment, the thickness of the region where the first fiber and the second fiber are stacked will be greater than the thickness of the region where only the first fiber is present.

[0273] As an example, the number of layers of the first fiber is 2-6, such as 2, 3, 4, 5, or 6 layers.

[0274] The total thickness of the first fiber is 1-3mm, such as 1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, and 3mm.

[0275] The second fiber has 1-8 layers, such as 1, 2, 3, 4, 5, 6, 7, 8, etc.

[0276] The total thickness of the second fiber is 1-4mm, such as 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, etc.

[0277] In the region where the first and second fibers are stacked, the thickness ratio of the second fiber to the first fiber is 0.5-4. Examples include 0.5, 0.8, 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, and 4. The total thickness of the second and first fibers is 2.5mm-5mm. Examples include 2.5mm, 2.8mm, 3.0mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.5mm, 4.8mm, and 5mm.

[0278] In this embodiment, the fiber composite sheet 3 includes both a first fiber and a second fiber. The first fiber is a continuous fiber extending in one direction, and the second fiber is a woven fiber, thereby improving the structural strength of the fiber composite sheet 3.

[0279] In some embodiments, as mentioned above, the fiber composite sheet 3 includes a bent portion 3c, which connects the main body portion 3a and the connecting portion 3b. In this embodiment, a second fiber is provided at least at a position corresponding to the bent portion 3c.

[0280] In this embodiment, the second fiber may cover only a portion of the bent portion 3c, or it may cover the entire bent portion 3c. The second fiber may not extend to the main body portion 3a and the connecting portion 3b, or the second fiber may extend to the main body portion 3a and the connecting portion 3b.

[0281] As mentioned above, the stress on the bending portion 3c is relatively complex. Therefore, in this embodiment, a second fiber is provided at the position corresponding to the bending portion 3c. Since the second fiber is a braided fiber, it can improve the modulus and strength of the bending portion 3c in multiple directions, thereby improving the structural strength of the fiber composite sheet 3.

[0282] In some embodiments, the second fiber includes at least one selected from glass fiber, basalt fiber, and aramid fiber. This improves both the structural strength and insulation performance of the fiber composite sheet 3.

[0283] In some embodiments, a plurality of battery cell groups 10 are arranged along a second direction to form a battery cell array 1, the second direction intersecting with the first direction; refer to Figure 11The fiber composite pull plate 3 includes at least one third pull plate 33, which is disposed between two adjacent battery cell groups 10 and covers at least a portion of the battery cell group 10 along the second direction.

[0284] As an example, the connecting part 3b of the third pull plate 33 is connected to the side surface of the side beam 21 facing the battery cell pack 10 in the first direction.

[0285] In this embodiment, the third pull plate 33 can further enhance the modulus and strength of the housing assembly 2 along the first direction, and can also constrain the battery cell group 10 along the second direction and resist the expansion force of the battery cell 11 along the second direction.

[0286] In some embodiments, the housing assembly 2 includes a first wall 22, a battery cell 11 supported on the first wall 22, and a third pull plate 33 connected to the first wall 22.

[0287] Here, the specific connection method between the third pull plate 33 and the first wall 22 is not limited. It can be adhesive, welding, snap-fit, fastener connection, or the two can form an integral structure.

[0288] In this embodiment, the third pull plate 33 is connected to the first wall 22, which helps to improve the integrity of the box assembly 2 and thus improve the structural strength of the box assembly 2.

[0289] In some embodiments, the maximum distance between the third pull plate 33 and the first wall 22 is greater than or equal to the maximum distance between the shoulder of the battery cell 11 and the first wall 22.

[0290] In this embodiment, it helps to provide constraints and support for the battery cell 11 along its entire length in the height direction, thereby improving the structural strength of the housing assembly 2.

[0291] In some embodiments, the side beam 21, the first wall 22, and the third tie plate 33 are formed as an integral structure.

[0292] As an example, the side beam 21, the first wall 22 and the third tie plate 33 all include an insulating structural layer 2a, and at least a portion of the insulating structural layer 2a of the three are formed into an integral structure, thereby making the three into an integral structure.

[0293] In this embodiment, by forming the side beam 21, the first wall 22 and the third tie plate 33 into an integral structure, the connection strength between the side beam 21 and the first wall 22, as well as the connection strength between the third tie plate 33 and the first wall 22, and between the third tie plate 33 and the side beam 21, can be improved, thereby increasing the structural strength of the box assembly 2.

[0294] Embodiments of this application also provide an electrical device that includes the battery device 100 described in any of the above embodiments. The electrical device of this application has all the advantages of the battery device 100 described in any of the above embodiments, which will not be repeated here.

[0295] In some embodiments, the electrical device includes an aircraft, which generally refers to a device that flies within or outside the atmosphere (space), and may include aircraft flying within the atmosphere and spacecraft flying in space. Aircraft may include airplanes, airships, etc., and exemplary examples may include low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional aircraft, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0296] The battery device 100 and the power-consuming device in one or more of the embodiments described above will be described in more detail and specific way with reference to a specific embodiment.

[0297] Reference Figures 1-12 The electrical device in this application embodiment includes an aircraft. By installing a battery device 100 on the aircraft, the battery device 100 can provide electrical power to the aircraft, enabling it to fly.

[0298] In this context, "aircraft" generally refers to any device that flies within or outside the atmosphere (space), including both atmospheric aircraft and spacecraft. Aircraft can include airplanes, airships, etc., and for example, low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional jets, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft. For example, an aircraft could be a cargo drone.

[0299] The battery device 100 is installed on the aircraft and is used to provide electrical power to the aircraft. The battery device 100 includes a housing assembly 2 and a battery cell array 1. The housing assembly 2 forms a receiving cavity, and a cover can be connected to the housing assembly 2 to seal the receiving cavity. The battery cell array 1 is disposed in the receiving cavity.

[0300] The battery cell array 1 includes at least two battery cell groups 10, each battery cell group 10 including multiple battery cells 11. The at least two battery cell groups 10 are arranged sequentially along a second direction. Multiple battery cells 11 in the same battery cell group 10 are arranged along a first direction. The battery cells 11 are approximately cuboid in shape, and the surface of the battery cell 11 with the largest area is perpendicular to the first direction. The height direction of the battery cells 11 is set along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0301] The housing assembly 2 is approximately a cuboid structure, including a first wall 22, two side plates 23 and two side beams 21. The first wall 22 is used to support the battery cell array 1. The two side beams 21 are arranged on opposite sides of the first wall 22 along a first direction. The two side plates 23 are arranged on opposite sides of the first wall 22 along a second direction. Both the side plates 23 and the side beams 21 are connected to the first wall 22. Adjacent side plates 23 are connected to the side beams 21.

[0302] The first wall 22 includes an insulating structural layer 2a and a fiber composite material layer 2b stacked along a third direction, with the insulating structural layer 2a located on the side of the first wall 22 facing the battery cell 11; the side beam 21 includes an insulating structural layer 2a and a fiber composite material layer 2b stacked at least along a first direction, with the insulating structural layer 2a located on the side of the side beam 21 facing the battery cell 11, and in the beam member, the insulating structural layer 2a and the fiber composite material layer 2b form a butt joint or lap joint connection structure on the side of the side beam 21 away from the receiving cavity; the side plate 23 includes an insulating structural layer 2a and a fiber composite material layer 2b stacked at least along a second direction, with the insulating structural layer 2a located on the side of the side plate 23 facing the battery cell 11, and in the side plate 23, the insulating structural layer 2a and the fiber composite material layer 2b form an lap joint connection structure on the side of the side plate 23 member away from the first wall 22.

[0303] In some specific embodiments, the insulating structural layer 2a of the first wall 22, the insulating structural layer 2a of the side beam 21, and the insulating structural layer 2a of the side plate 23 are formed as an integral structure, and the fiber composite material layer 2b of the first wall 22, the fiber composite material layer 2b of the side beam 21, and the fiber composite material layer 2b of the side plate 23 are formed as an integral structure.

[0304] In some specific embodiments, a hollow cavity 211 is formed between the fiber composite material layer 2b and the insulation layer of the side beam 21, and the support structure 212 is disposed within the hollow cavity 211.

[0305] The support structure 212 includes a first support body 213, the first support body 213 having a support plate 2131 facing the first plate, the first direction being the thickness direction of the support plate 2131, and the support plate 2131 abutting against the first plate along the first direction.

[0306] The first support 213 also includes an extension plate 2132 connected to the support plate 2131. The extension plate 2132 is connected to the side of the support plate 2131 facing the battery cell 11 and extends along the first direction. The extension plate 2132 is connected to the first wall 22 and projects onto the same projection plane along the thickness direction of the first wall 22. The projection of the extension plate 2132 overlaps with the projection of at least a portion of the battery cell 11.

[0307] In some specific embodiments, the extension plate 2132 is located between the insulating structural layer 2a and the fiber composite material layer 2b of the first wall 22.

[0308] The battery device 100 also includes a fiber composite sheet 3, which includes a main body 3a, a bent portion 3c, and a connecting portion 3b. The connecting portion 3b is located at both ends of the main body 3a along a first direction. The connecting portion 3b is connected to the side surface of the side beam 21 that is opposite to the battery cell 11 along the first direction. An adhesive layer is provided between the connecting portion 3b and the side beam 21. The connecting portion 3b has a first positioning structure 3d, and the side beam 21 has a second positioning structure 21b. The first positioning structure 3d and the second positioning structure 21b are connected in a cooperating manner. Both the first positioning structure 3d and the second positioning structure 21b are hole structures.

[0309] The fiber composite sheet 3 includes a first substrate and a first fiber. The first fiber is a continuous fiber. In the main body 3a, the first fiber extends along a first direction. The first substrate includes at least one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin; and / or the first fiber includes at least one of glass fiber, basalt fiber, and aramid fiber.

[0310] The fiber composite sheet 3 also includes a second fiber, which is a woven fiber. The second fiber and the first fiber are stacked together along the thickness direction of the fiber composite sheet 3, and the second fiber is disposed at least at the position corresponding to the bending portion 3c. The second fiber includes at least one of glass fiber, basalt fiber, and aramid fiber.

[0311] The fiber composite pull plate 3 includes at least one first pull plate 31, which covers at least a portion of the terminal posts 112 of the battery cell assembly 10 from the side of the battery cell assembly 10 away from the first wall 22.

[0312] The fiber composite pull plate 3 includes at least two second pull plates 32, which cover both sides of the battery cell array 1 along the second direction. The second pull plates 32 are located on the side of the side plate 23 away from the first wall 22 along the thickness direction (i.e., the third direction).

[0313] The battery device 100 also includes a busbar 4, which is located between the battery cell group 10 and the first pull plate 31. The first pull plate 31 has an insulating layer on the side facing the battery cell 11 and is bonded to the busbar 4.

[0314] The battery device 100 also includes a sampling component 5, which is located between the first pull plate 31 and the battery cell group 10. The sampling component 5 has at least one output element 51. The first pull plate 31 has a clearance notch 31a, which is positioned corresponding to the output element 51. The side beam 21 has at least one clearance groove 21a, and the output element 51 is at least partially located within the clearance groove 21a.

[0315] The first aspect of this application provides a battery device 100, such as... Figure 13 , Figure 14 and Figure 20 As shown, the battery device 100 includes a housing assembly 2, a battery cell group 10, a pull plate device, and a busbar 4. The housing assembly 2 defines a receiving cavity and includes a first wall 22. The battery cell group 10 is disposed within the receiving cavity and includes a plurality of battery cells 11 stacked along a first direction, with the battery cells 11 supported by the first wall 22. The pull plate device includes at least one first pull plate 31 that covers at least a portion of the terminal posts 112 of the battery cell group 10 from the side of the battery cell group 10 opposite to the first wall 22. The busbar 4 is located between the battery cell group 10 and the first pull plate 31, and the first pull plate 31 is connected to the busbar 4 and / or the housing of the battery cells 11.

[0316] For example, such as Figure 13 and Figure 14 As shown, the first pull plate 31 and the busbar 4 can be directly connected or indirectly connected. In one specific embodiment, the first pull plate 31 and the busbar 4 are bonded together.

[0317] For example, the first pull plate 31 can be connected to the busbar 4, but the first pull plate 31 is not connected to the housing of the battery cell 11.

[0318] For example, the first pull plate 31 can be connected to the housing of the battery cell 11, but the first pull plate 31 is not connected to the busbar 4.

[0319] For example, both the first pull plate 31 and the busbar 4 are connected to the housing of the battery cell 11.

[0320] For example, when the first pull plate 31 is connected to the housing of the battery cell 11, the first pull plate 31 can be connected to the housing of the battery cell 11.

[0321] In some embodiments, the housing 115 includes an end cap and a housing, the housing having an opening and the end cap covering the opening.

[0322] In some embodiments, at least one terminal post 112 is provided on the housing 115, and the terminal post 112 is electrically connected to the tab 1141. The terminal post 112 can be directly connected to the tab 1141, or it can be indirectly connected to the tab 1141 through a current collector. The terminal post 112 can be provided on the end cap or on the housing.

[0323] In this embodiment, the first pull plate 31 is connected to the busbar 4 and / or the outer casing of the battery cell 11. The busbar 4 is electrically connected to the battery cell 11. The connection between the first pull plate 31 and the busbar 4 can alleviate the displacement of the battery cell 11 in the battery cell group 10 during vibration, reducing the wear of the battery cell group 10. The connection between the first pull plate 31 and the outer casing of the battery cell 11 can also alleviate the displacement of the battery cell 11 in the battery cell group 10 during vibration, reducing the wear of the battery cell group 10. The first pull plate 31 can also provide protection for the busbar 4.

[0324] In some embodiments, such as Figure 13 and Figure 14 As shown, the pull plate device includes a main body 3a. The main body 3a of the first pull plate 31 includes a support part 311, which is connected to the busbar 4.

[0325] In some embodiments, the pull plate device includes a first pull plate 31, and the first pull plate 31 includes a main body portion 3a.

[0326] In some embodiments, the first pull plate 31 includes a main body 3a and a connecting part 3b connected to the main body 3a. The main body 3a is connected to the busbar 4, and the connecting part 3b is connected to the housing assembly 2.

[0327] For example, the connecting portion 3b is connected to at least one side of the main body portion 3a along the first direction.

[0328] For example, the carrier portion 311 can be directly connected to the busbar 4 or indirectly connected. In one specific embodiment, the carrier portion 311 is bonded to the busbar 4.

[0329] For example, such as Figure 6 As shown, the pull plate device also includes a second pull plate 32, which includes a main body 3a and a connecting part 3b.

[0330] For example, the pull plate device also includes a second pull plate 32, which includes a main body portion 3a and a connecting portion 3b.

[0331] In this embodiment, the support portion 311 is connected to the busbar 4, which facilitates a more effective connection between the first pull plate 31 and the busbar 4.

[0332] In some embodiments, such as Figure 13and Figure 14 As shown, the bearing part 311 is bonded to the busbar 4.

[0333] The support portion 311 and the busbar 4 can be bonded together with an adhesive. For example, the adhesive can be a structural adhesive.

[0334] In this embodiment, the carrier 311 is bonded to the busbar 4, which helps to improve the connection strength and connection area between the carrier 311 and the battery cell pack 10.

[0335] It can be understood that the carrier 311 and the busbar 4 can also be connected in other ways.

[0336] In some embodiments, such as Figure 2 , Figure 13 and Figure 14 As shown, there are multiple battery cell groups 10, which are arranged along a second direction to form a battery cell array 1, intersecting with the first direction. The battery device 100 also includes a sampling component 5, which is electrically connected to the battery cell groups 10. The thickness direction of the first wall 22 is a third direction, which intersects with both the first and second directions. Along the third direction, the sampling component 5 is located between the battery cell groups 10 and the first pull plate 31. The main body 3a of the first pull plate 31 also includes a clearance portion 312 connected to at least one side of the corresponding support portion 311 along the second direction. The clearance portion 312 covers the sampling component 5 and protrudes from the support portion 311 along the third direction away from the first wall 22 to avoid the sampling component 5.

[0337] In some embodiments, such as Figure 13 As shown, the main body 3a of the first pull plate 31 has a relief portion 312 on both sides along the second direction of the bearing portion 311.

[0338] In some embodiments, the supporting portion 311 and the clearance portion 312 are arranged alternately along the second direction.

[0339] In some embodiments, such as Figure 14 As shown, the sampling component 5 is electrically connected to the busbar 4.

[0340] In some embodiments, within the same projection plane along a third direction, the projection of the sampling component 5 is located within the range of the projection of the avoidance portion 312, and the projection of the busbar 4 at least partially overlaps with the projection of the support portion 311.

[0341] In some embodiments, the avoidance portion 312 has a recessed space on the side facing the sampling component 5 in a third direction for avoiding the sampling component 5.

[0342] For example, the avoidance part 312 protrudes relative to the support part 311 along a third direction away from the sampling component 5.

[0343] In this embodiment, the sampling component 5 is electrically connected to the battery cell group 10. The sampling component 5 can collect physical quantities such as temperature and voltage of the battery cell group 10. Therefore, the battery cell group 10 can be monitored and managed based on the collected physical parameters, so that the battery cell group 10 can work normally, which is beneficial to extending the service life of the battery device 100 and reducing the probability of thermal runaway of the battery cell 11. Moreover, the avoidance part 312 protrudes from the bearing part 311 along a third direction away from the first wall 22 to avoid the sampling component 5. The avoidance part 312 can avoid the sampling component 5, which improves the structural compactness of the housing assembly 2.

[0344] It is understandable that the main body 3a may not include the avoidance part 312.

[0345] In some embodiments, such as Figure 14 and Figure 16 As shown, the clearance portion 312 has a weight reduction hole 3121 that penetrates the clearance portion 312 in a third direction; the main body portion 3a of the first pull plate 31 also includes a protective cover 313, which is connected to the side of the clearance portion 312 away from the battery cell pack 10 in a third direction. The protective cover 313 covers the weight reduction hole 3121, and the density of the material of the protective cover 313 is less than the density of the material of the clearance portion 312.

[0346] For example, such as Figure 16 As shown, at least a portion of the opening of the clearance portion 312 forms a weight reduction hole 3121.

[0347] For example, such as Figure 16 As shown, the same clearance portion 312 has at least two weight-reducing holes 3121. Furthermore, the plurality of weight-reducing holes 3121 in the same clearance portion 312 are spaced apart along a first direction.

[0348] For example, such as Figure 14 As shown, the sampling component 5 includes a sampling transmission component 52 and a signal processing component 53 electrically connected along the second direction. Along the third direction, the sampling transmission component 52 is located between the battery cell group 10 and the signal processing component 53. In the same projection plane projected along the third direction, the projection of the signal processing component 53 is located within the projection range of the weight reduction hole 3121.

[0349] For example, the sampling component 5 may include a sampling transmission component 52 and a signal processing component 53. The sampling transmission component 52 is mainly used for the acquisition and transmission of physical quantity signals, while the signal processing component 53 is mainly used for signal processing, control, and communication. It can be primarily used for local control and is sometimes referred to as a slave control module. Figure 13As shown, the battery device 100 also includes a battery management system, which may include a main control module 71. The main control module 71 is mainly used for overall control and can communicate with multiple signal processing components.

[0350] In some embodiments, such as Figure 14 and Figure 16 As shown, the protective cover 313 and the clearance portion 312 can be directly or indirectly connected. For example, the protective cover 313 and the clearance portion 312 can be indirectly connected by structural adhesive, and / or the protective cover 313 and the clearance portion 312 can be connected by bolts or rivets, etc.

[0351] For example, the protective cover 313 may be made of an insulating material.

[0352] In some embodiments, the protective cover 313 may be made of plastic. For example, the protective cover 313 may be made of polycarbonate (PC).

[0353] For example, such as Figure 16 As shown, within the same projection plane along the third direction, the projection of the weight reduction hole 3121 is located within the range of the projection of the protective cover 313.

[0354] In this embodiment, since the clearance portion 312 has a weight-reducing hole 3121 extending through the clearance portion 312 in a third direction, the weight of the clearance portion 312 can be reduced, thereby reducing the weight of the plate-pulling device and improving the lightweighting of the battery device 100. Since the protective cover 313 covers the weight-reducing hole 3121, and the material density of the protective cover 313 is less than that of the clearance portion 312, the weight of the protective cover 313 can be reduced while decreasing the probability of foreign objects entering the sampling assembly 5, thereby reducing the weight of the plate-pulling device and improving the lightweighting of the battery device 100.

[0355] It is understandable that the clearance part 312 may not include the weight reduction hole 3121.

[0356] It is understandable that the density of the material of the protective cover 313 can be greater than or equal to the density of the material of the clearance part 312.

[0357] In some embodiments, such as Figure 14 and Figure 16 As shown, the protective cover 313 includes multiple protective walls 3131, which surround to form a protective cavity. The protective cover 313 also has a protective opening communicating with the protective cavity. The protective opening faces the weight reduction hole 3121 in a first direction, and the part of the sampling component 5 passes through the protective opening and is located inside the protective cavity.

[0358] This application does not specifically limit the shape and size of the protective cavity and the protective opening, as long as the part of the sampling component 5 can pass through the protective opening and be located inside the protective cavity.

[0359] For example, the protective opening faces the battery cell group 10 in a third direction.

[0360] For example, the signal processing component 53 is located inside the protective cavity, and a portion of the sampling transmission component 52 is located inside the protective cavity.

[0361] In this embodiment, since the sampling component 5 passes through the protective opening and is located inside the protective cavity, the protective cover 313 can avoid the sampling component 5, thereby improving the structural compactness of the housing component 2.

[0362] In some embodiments, such as Figure 14 As shown, the multiple protective walls 3131 include multiple protective sidewalls, which surround to form a protective opening. The protective cover 313 also includes a protective connecting wall 3134, which is connected to the side of the protective sidewall facing away from the protective cavity. The protective connecting wall 3134 is connected to the clearance part 312.

[0363] For example, at least one of the plurality of protective sidewalls has a protective connecting wall 3134 connected to the side of the protective sidewall facing away from the protective cavity. Further, any one of the plurality of protective sidewalls has a protective connecting wall 3134 connected to the side of the protective sidewall facing away from the protective cavity.

[0364] For example, the protective connecting wall 3134 and the clearance part 312 can be directly connected or indirectly connected.

[0365] For example, the surface of the protective connecting wall 3134 facing the clearance portion 312 is a plane. Of course, the surface of the protective connecting wall 3134 facing the clearance portion 312 can also be a curved surface with a slight curvature.

[0366] In this embodiment, since the protective connecting wall 3134 is connected to the avoidance part 312, the connection area between the protective cover 313 and the avoidance part 312 can be increased, thereby increasing the connection strength between the protective cover 313 and the avoidance part 312.

[0367] It is understandable that the protective cover 313 may also exclude the protective connecting wall 3134.

[0368] In some embodiments, such as Figure 14 and Figure 16 As shown, the battery device 100 also includes a first connector (not shown), which connects the protective connecting wall 3134 and the clearance portion 312 along a third direction; and / or, the protective connecting wall 3134 and the clearance portion 312 are at least bonded together.

[0369] Optionally, along a third direction, the first connector connects the protective connecting wall 3134 and the clearance portion 312; or the protective connecting wall 3134 and the clearance portion 312 are bonded; or along a third direction, the first connector connects the protective connecting wall 3134 and the clearance portion 312 and the protective connecting wall 3134 and the clearance portion 312 are bonded.

[0370] For example, the protective connecting wall 3134 and the clearance portion 312 can be bonded together with structural adhesive.

[0371] For example, the first connection may be a bolt or rivet, etc.

[0372] In this embodiment, since the first connector connects the protective connecting wall 3134 and the clearance portion 312; and / or the protective connecting wall 3134 and the clearance portion 312 are at least bonded, the degree of freedom in the connection form of the protective connecting wall 3134 and the clearance portion 312 can be increased. Moreover, the above connection method is simple, which can simplify the manufacturing process of the first pull plate 31, thereby improving the production efficiency of the first pull plate 31 and thus improving the production efficiency of the battery device 100.

[0373] In some embodiments, such as Figure 13 and Figure 14 As shown, the battery device 100 also includes a wiring harness (not shown) and an electrical component 7. The wiring harness is located inside the housing assembly 2. The electrical component 7 is located inside the housing assembly 2, on the side of the protective cover 313 facing away from the battery cell pack 10 in a third direction. The protective cover 313 has a wiring harness clearance opening 3135 through which the wiring harness passes. One end of the wiring harness is connected to the sampling component 5, and the other end of the wiring harness is connected to the sampling component 5 and / or the electrical component 7.

[0374] For example, electrical component 7 includes a main control module 71 or a high-voltage box 72, etc. The high-voltage box 72 is mainly used for managing, distributing and protecting high-voltage electrical energy.

[0375] This application does not impose specific limitations on the shape and size of the wire harness clearance opening 3135, as long as it allows the wire harness to pass through.

[0376] like Figure 13 and Figure 14 As shown, a protective cover 313 has at least one wire harness clearance opening 3135.

[0377] In one specific embodiment, a protective cover 313 has two wire harness clearance openings 3135.

[0378] For example, the protective cover 313 has wire harness clearance openings 3135 on both opposite sides along the second direction. Furthermore, when projected along the second direction, the projections of the wire harness clearance openings 3135 on both opposite sides of the same protective cover 313 along the second direction have overlapping portions.

[0379] For example, the wire harness clearance opening 3135 may be located on at least one side of the protective cover 313 along the second direction or on at least one side of the protective cover 313 along the third direction.

[0380] In this embodiment, since the sampling component 5 and the electrical component 7 are connected, the working status of the battery cell pack 10 can be monitored and managed based on the physical parameters obtained by the sampling component 5. Moreover, since the protective cover 313 has a wire harness avoidance opening 3135, the wire harness passes through the wire harness avoidance opening 3135 to connect different sampling components 5 or to connect the sampling component 5 and the electrical component 7. Therefore, it is convenient to connect different sampling components 5 or the sampling component 5 and the electrical component 7.

[0381] In some embodiments, such as Figures 13 to 15 As shown, the housing assembly 2 includes two side beams 21 arranged opposite to each other along a first direction. The two side beams 21 are used to constrain the battery cell group 10. The side beams 21 are connected to the opposite ends of the first wall 22 along the first direction. The pull plate device includes a main body 3a and a connecting part 3b. The connecting part 3b is located at both ends of the main body 3a along the first direction and is connected to the side beams 21.

[0382] For example, the connecting part 3b can be directly or indirectly connected to the side beam 21. In a specific embodiment, the connecting part 3b is bonded to the side beam 21, and the connecting part 3b and the side beam 21 are connected by a connector.

[0383] In this embodiment, since the connecting part 3b is connected to the side beam 21, part of the expansion force of the battery cell pack 10 borne by the side beam 21 can be transmitted to the first pull plate 31. In other words, the first pull plate 31 can share the expansion force of the battery cell pack 10 with the side beam 21, thereby improving the modulus and strength of the housing assembly 2, especially improving the modulus of the housing assembly 2 along the first direction, and reducing the probability of bending deformation of the side beam 21 and / or reducing the amount of deformation when the side beam 21 bends.

[0384] In some embodiments, such as Figure 14 and Figure 15 As shown, the side beam 21 includes a second wall and a reinforcing member disposed on the second wall, and the connecting part 3b is connected to the reinforcing member.

[0385] For example, the connecting part 3b may be connected to one side of the reinforcing member along the first direction, or the connecting part 3b may be connected to one side of the reinforcing member along the third direction.

[0386] In this embodiment, the reinforcing member can further strengthen the side beam 21, thereby reducing the probability or degree of deformation of the side beam 21 due to the expansion of the battery cell assembly 10. The connecting part 3b is connected to the reinforcing member, and the connecting part 3b and the reinforcing member can jointly share the expansion force of the battery cell assembly 10, thereby further improving the modulus and strength of the housing assembly 2.

[0387] In some embodiments, such as Figure 13 and Figure 15 As shown, the thickness direction of the first wall 22 is a third direction, which intersects with the first direction; at least one reinforcing member is a first reinforcing member 216a, and at least one second wall is a first sub-wall 215a. The first reinforcing member 216a is connected to the side of the first sub-wall 215a facing away from the first wall 22 along the third direction, and the side of the first sub-wall 215a facing away from the battery cell group 10 along the first direction extends beyond the side of the first reinforcing member 216a facing away from the battery cell group 10 along the first direction; at least one connecting part 3b is a first connecting part 321, which is connected to the side of the first reinforcing member 216a facing away from the battery cell group 10 along the first direction.

[0388] For example, along the first direction, the first reinforcement 216a is located between the first connection portion 321 and the battery cell assembly 10.

[0389] For example, along a third direction, the first reinforcement 216a is connected to the first sub-wall 215a.

[0390] For example, along a third direction, the projection of the first reinforcement 216a is within the range of the projection of the first sub-wall 215a.

[0391] For example, the first connecting portion 321 is bent relative to the main body portion 3a, and the first connecting portion 321 is connected to the first reinforcing member 216a.

[0392] Since the first connecting portion 321 is connected to the side of the first reinforcing member 216a opposite to the battery cell 11 along the first direction, it helps to increase the connection area between the first connecting portion 321 and the first reinforcing member 216a, allowing the expansion force borne by the first reinforcing member 216a along the first direction to be better transmitted to the first pull plate 31, thereby further improving the modulus and strength of the housing assembly 2 along the first direction. Moreover, the first reinforcing member 216a can provide support force for the first connecting portion 321 along the first direction, more effectively supporting the first connecting portion 321. Furthermore, the side of the first sub-wall 215a opposite to the battery cell assembly 10 along the first direction extends beyond the side of the first reinforcing member 216a opposite to the battery cell assembly 10 along the first direction, thus providing clearance space for the first connecting portion 321 to be connected to the surface of the first reinforcing member 216a opposite to the battery cell 11 along the first direction. This is beneficial for the overall size of the first pull plate 31 and the first sub-wall 215a to be smaller, improving the miniaturization of the battery device 100.

[0393] In some embodiments, such as Figure 15 As shown, the first pull plate 31 also includes a reinforcing part 314 connected to the first reinforcing member 216a. The reinforcing part 314 is connected between the main body part 3a and the first connecting part 321. The thickness of the reinforcing part 314 along the third direction is greater than the thickness of the main body part 3a along the third direction.

[0394] In a specific embodiment, such as Figure 14 and Figure 15 As shown, along the third direction, the surface of the main body 3a facing the battery cell assembly 10 is flush with the surface of the reinforcement 314 facing the battery cell assembly 10, and along the third direction, the surface of the reinforcement 314 away from the battery cell assembly 10 is further away from the battery cell assembly 10 than the surface of the main body 3a away from the battery cell assembly 10.

[0395] In some embodiments, a portion of the reinforcement 314 protrudes along a third direction toward the side opposite to the battery cell pack 10, thereby enabling the portion of the reinforcement 314 to avoid the sampling assembly 5.

[0396] In some embodiments, the bent portion 3c is connected between the reinforcing portion 314 and the connecting portion 3b.

[0397] In this embodiment, the thickness of the reinforcing part 314 along the third direction is greater than the thickness of the main body part 3a along the third direction. As a result, the reinforcing part 314 is thicker and stronger, which reduces the probability of the reinforcing part 314 deforming due to stress concentration or reduces the degree of deformation of the reinforcing part 314 due to stress concentration.

[0398] It is understandable that the thickness of the reinforcing part 314 along the third direction may be less than or equal to the thickness of the main body part 3a along the third direction.

[0399] In some embodiments, such as Figure 15 As shown, the battery device 100 also includes a second connector 62 and a third connector 63. Along the third direction, the second connector 62 connects the reinforcing part 314 and the first reinforcing part 216a; along the first direction, the third connector 63 connects the first connecting part 321 and the first reinforcing part 216a.

[0400] For example, the second connector 62 can be a bolt or rivet, etc.

[0401] For example, the reinforcement 314 has a first hole 314a, the first reinforcing member 216a has a second hole, and a portion of the second connector 62 passes through the first hole and is inserted into the second hole.

[0402] For example, the third connector 63 can be a bolt or rivet, etc.

[0403] For example, the first connecting portion 321 has a third hole 321a, the first reinforcing member 216a has a fourth hole, and a portion of the third connecting member 63 passes through the third hole 321a and is inserted into the fourth hole.

[0404] In this embodiment, along a third direction, the second connector 62 connects the reinforcing portion 314 and the first reinforcing member 216a; along a first direction, the third connector 63 connects the first connecting portion 321 and the first reinforcing member 216a. This improves the connection strength between the first pull plate 31 and the first reinforcing member 216a, and reduces the probability of the first pull plate 31 separating from the first reinforcing member 216a due to the expansion force of the battery cell assembly 10.

[0405] In some embodiments, such as Figure 15 As shown, the battery device also includes a sampling component, and the side beam 21 has at least one clearance groove 21a, with a portion of the sampling component 5 located within the clearance groove 21a.

[0406] Here, the specific location and shape of the clearance groove 21a can be determined according to the location and structure of the sampling component 5. It is only necessary to make part of the sampling component 5 extend into the clearance groove 21a.

[0407] In some embodiments, the first reinforcement 216a is formed with at least one clearance groove 21a.

[0408] In this embodiment, the side beam 21 may have one or more clearance grooves 21a. The clearance grooves 21a may correspond to a single sampling component 5 or multiple sampling components 5. In some examples, the side beam 21 is provided with multiple clearance grooves 21a along the second direction, and the clearance grooves 21a, sampling components 5 and battery cell groups 10 are correspondingly arranged.

[0409] In this embodiment, since the side beam 21 has at least one clearance groove 21a, the side beam 21 can avoid the sampling component 5, thus preventing interference between the side beam 21 and the sampling component 5.

[0410] In some embodiments, such as Figure 14 As shown, the thickness direction of the first wall is a third direction, which intersects with the first direction; at least one reinforcing member is a second reinforcing member 216b, at least one second wall is a second sub-wall 215b, the second reinforcing member 216b is connected to the side of the second sub-wall 215b facing the battery cell group 10 along the first direction, and at least one connecting part 3b is a second connecting part 322, wherein the second connecting part 322 is connected to the side of the second reinforcing member 216b away from the first wall along the third direction.

[0411] In some embodiments, the second reinforcement 216b and the second subwall 215b are connected along a first direction.

[0412] In some embodiments, the second connecting portion 322 and the main body portion 3a are connected along a first direction.

[0413] In this embodiment, the second connecting part 322 is connected to the side of the second reinforcing member 216b that is away from the first wall 22 along a third direction, so that the second connecting part 322 and the second reinforcing member 216b can be connected, thereby connecting the second connecting part 322 to the measuring beam.

[0414] In some embodiments, along a third direction, the thickness of the second connecting portion 322 is greater than the thickness of the main body portion 3a.

[0415] In one specific embodiment, along a third direction, the surface of the main body 3a facing the battery cell group 10 is flush with the surface of the second connecting portion 322 facing the battery cell group 10, and along a third direction, the surface of the second connecting portion 322 away from the battery cell group 10 is further away from the battery cell group 10 than the surface of the main body 3a away from the battery cell group 10.

[0416] In some embodiments, a portion of the second connection portion 322 protrudes along a third direction toward the side opposite to the battery cell pack 10, thereby allowing the portion of the second connection portion 322 to avoid the sampling component 5.

[0417] In this embodiment, the thickness of the second connecting portion 322 along the third direction is greater than the thickness of the main body portion 3a along the third direction. As a result, the second connecting portion 322 is thicker and stronger, which reduces the probability of deformation of the second connecting portion 322 due to stress concentration or reduces the degree of deformation of the second connecting portion 322 due to stress concentration.

[0418] In some embodiments, the battery device 100 further includes a fourth connector 64, which connects to the second connector 322 and the second reinforcement 216b along a third direction.

[0419] For example, the fourth connector 64 can be a bolt or rivet, etc.

[0420] For example, such as Figure 14 and Figure 16 As shown, the second connecting part 322 has a fifth hole 322b, the second reinforcing member 216b has a sixth hole, and a portion of the fourth connecting member 64 passes through the fifth hole 322b and is inserted into the sixth hole.

[0421] In this embodiment, along a third direction, the fourth connector 64 connects the second connector 322 and the second reinforcing member 216b, which helps to improve the connection strength between the first pull plate 31 and the second reinforcing member 216b and reduce the probability of the first pull plate 31 and the second reinforcing member 216b separating due to the expansion force of the battery cell assembly 10.

[0422] In some embodiments, such as Figure 13 , Figures 16 to 18 As shown, the battery device 100 also includes a support device 8 and an electrical component 7. The support device 8 is located within the housing assembly 2 and includes a support mounting portion 81 and a support support portion 82 connected to the support mounting portion 81. The support mounting portion 81 is connected to the side of the support portion 311 facing away from the battery cell pack 10 in a third direction. In the third direction, the support support portion 82 is further away from the battery cell pack 10 than the clearance portion 312, and the support support portion 82 spans across the opposite sides of the clearance portion 312 in a second direction. The electrical component 7 is located within the housing assembly 2 and is connected to the side of the support support portion 82 facing away from the battery cell pack 10 in a third direction.

[0423] The bracket device 8 is used to support and fix the electrical components 7.

[0424] For example, such as Figure 17 or Figure 18 As shown, the bracket support part 82 includes a first support section 822 and a second support section 823. Along the third direction, the first support section 822 is further away from the first pull plate 31 than the bracket mounting part 81, and the second support section 823 connects the bracket mounting part 81 and the first support section 822.

[0425] For example, such as Figure 17 As shown, the bracket support part 82 and the bracket mounting part 81 are arranged alternately in sequence.

[0426] For example, such as Figure 18 As shown, the bracket mounting part 81 is arranged at intervals along the circumference of the bracket support part 82.

[0427] For example, the bracket mounting portion 81 and the support portion 311 can be directly connected or indirectly connected. In one specific embodiment, the bracket mounting portion 81 and the support portion 311 are bonded together.

[0428] For example, along a third direction, the first support segment 822 is further away from the battery cell group 10 than the avoidance portion 312, and the second support segment 823 connecting the opposite ends of the same first support segment 822 is located on opposite sides of the avoidance portion 312.

[0429] For example, along a third direction, the first support segment 822 is further away from the battery cell group 10 than the protective cover 313, and the second support segment 823 connecting the opposite ends of the same first support segment 822 is located on opposite sides of the protective cover 313.

[0430] For example, at least two second support sections 823 support the first support section 822, and the first support section 822 is located on the side of the avoidance section 312 away from the battery cell group 10.

[0431] For example, at least two second support sections 823 support the first support section 822, and the first support section 822 is located on the side of the protective cover 313 opposite to the battery cell pack 10.

[0432] For example, the support portion 82 and the clearance portion 312 are spaced apart.

[0433] For example, the bracket support 82 and the protective cover 313 are spaced apart.

[0434] For example, the electrical component 7 and the bracket support 82 can be directly or indirectly connected. In one specific embodiment, the electrical component 7 and the bracket support 82 are connected via a fifth connector 65.

[0435] In this embodiment, since the battery device 100 also includes a bracket device 8, and the electrical component 7 is connected to the bracket support portion 82 of the bracket device 8, the electrical component 7 can be assembled into the housing assembly, and the relative position of the electrical component 7 and the bracket device 8 can be fixed, reducing the probability of unstable electrical connection of the electrical component 7 due to shaking.

[0436] In some embodiments, the support devices 8 supporting the same electrical component 7 are spaced apart.

[0437] For example, such as Figure 13 and Figure 16 As shown, the electrical component 7 is supported by bracket devices 8 at its opposite ends.

[0438] In this embodiment, since the support devices 8 supporting the same electrical component 7 are spaced apart, the electrical component 7 can be supported more effectively, making the electrical component 7 more securely fixed.

[0439] In some embodiments, such as Figure 13 and Figure 19 As shown, the battery device 100 also includes a fifth connector 65 located within the housing assembly 2. The fifth connector 65 includes a connecting body 651 and a flange 652 connected to the outer peripheral surface of the connecting body 651. At least a portion of the connecting body 651 passes through the bracket support portion 82 and the electrical assembly 7. The flange 652 contacts the side of the bracket support portion 82 facing the battery cell group 10 in a third direction.

[0440] For example, the fifth connector 65 can be a bolt or rivet, etc.

[0441] For example, the bracket support 82 has a seventh hole 82a, the electrical component 7 has an eighth hole, and at least a portion of the connecting body 651 of the fifth connector 65 passes through the seventh hole 82a and is inserted into the eighth hole.

[0442] For example, the connecting body 651 has an external thread, and the portion of the electrical component 7 that contacts the eighth aperture has an internal thread, and the connecting body 651 and the electrical component 7 are connected by threads.

[0443] In this embodiment, since at least a portion of the connecting body 651 passes through the bracket support portion 82 and the electrical component 7, the fifth connector 65 can be used to assemble the bracket support portion 82 and the electrical component 7, resulting in a simple structure. Furthermore, the flange 652 contacts the side of the bracket support portion 82 facing the battery cell pack 10 in a third direction, thus enabling the flange 652 to connect with the bracket support portion 82. This further enhances the connection strength between the fifth connector 65 and the bracket support portion 82, thereby increasing the connection strength between the electrical component 7 and the bracket device 8 and further reducing the probability of unstable electrical connection of the electrical component 7 due to shaking.

[0444] In some embodiments, the flange 652 is bonded to the side of the bracket support 82 facing the battery cell pack 10 in a third direction.

[0445] For example, flange 652 is bonded to the side of first support segment 822 facing the battery cell assembly 10 in a third direction.

[0446] For example, the flange 652 and the bracket support 82 can be bonded together with structural adhesive.

[0447] In this embodiment, since the flange 652 is bonded to the side of the bracket support 82 facing the battery cell pack 10 in the third direction, the connection strength between the fifth connector 65 and the bracket support 82 can be further improved, thereby further improving the connection strength between the electrical component 7 and the bracket device 8, and further reducing the probability of unstable electrical connection of the electrical component 7 due to shaking.

[0448] In some embodiments, such as Figure 19 As shown, there is an adhesive between the flange 652 and the bracket support 82. The flange 652 has a through hole 6521 projected along a third direction. The projection of the through hole 6521 at least partially overlaps with the projection of the adhesive.

[0449] For example, the adhesive is a structural adhesive.

[0450] By way of example, the flange 652 has one or more through holes 6521. In one particular embodiment, the multiple through holes 6521 are arranged at circumferential intervals along the connecting body.

[0451] This application does not impose specific limitations on the shape, size, etc. of the through hole 6521, as long as the adhesive can overflow into the through hole 6521.

[0452] Optionally, the projection of the through hole 6521 and the projection of the adhesive can partially overlap or completely overlap.

[0453] In this embodiment, since there is an adhesive between the flange 652 and the bracket support portion 82, and the flange 652 has a through hole 6521, the bonding condition between the flange 652 and the bracket support portion 82 can be observed through the through hole 6521, and the adhesive can overflow into the through hole 6521, thereby improving the effectiveness and strength of the connection between the flange 652 and the bracket support portion 82.

[0454] In some embodiments, such as Figure 13 and Figure 17 As shown, the electrical component 7 includes a main control module 71; multiple bearing parts 311 and clearance parts 312 are alternately arranged along the second direction; at least one support device 8 is a first support 8a, the first support 8a includes multiple support mounting parts 81 and multiple support supporting parts 82 alternately arranged along the second direction, the first support 8a spans multiple clearance parts along the second direction, and the multiple support supporting parts 82 are connected to the main control module 71.

[0455] For example, multiple support portions 82 of the same first bracket 8a are connected to the main control module 71.

[0456] For example, multiple first brackets 8a are connected to the main control module 71.

[0457] For example, the main control module 71 is provided with first brackets 8a at its opposite ends.

[0458] For example, different first brackets 8a connected to the same main control module 71 are spaced apart. Further, different first brackets 8a connected to the same main control module 71 are spaced apart along a first direction.

[0459] In this embodiment, since the first bracket 8a is provided with multiple clearance portions 312 along the second direction, and since the bracket support portion 82 is connected to the bearing portion 311, multiple bracket support portions 82 of the same first bracket 8a can be connected to different bearing portions 311 respectively, thereby increasing the connection area between the first bracket 8a and the bearing portion 311 and thus improving the connection strength between the first bracket 8a and the bearing portion 311. Moreover, since the first bracket 8a includes multiple bracket mounting portions 81 and multiple bracket support portions 82 alternately arranged along the second direction, the strength of the first bracket 8a can be improved, which is beneficial for the first bracket 8a to more effectively support the main control module 71.

[0460] In some embodiments, such as Figure 13 and Figure 18 As shown, the electrical component 7 includes a high-voltage box 72; at least two support devices 8 are second supports 8b, and a plurality of support mounting portions 81 in the second supports 8b are arranged at intervals along the circumference of the support portion 82, and at least two second supports 8b respectively support the opposite ends of the high-voltage box 72.

[0461] For example, multiple second brackets 8b are connected to the high-voltage box 72.

[0462] For example, the high-voltage box 72 is provided with second brackets 8b at opposite ends.

[0463] For example, different second brackets 8b connected to the same high-voltage box 72 are spaced apart. Further, the different second brackets 8b connected to the same high-voltage box 72 are spaced apart along a second direction.

[0464] For example, the second bracket 8b is disposed at one end of the first pull plate 31 along the first direction.

[0465] For example, the second bracket 8b is provided with at least one protective cover 313 along the second direction.

[0466] In this embodiment, since at least two second brackets 8b respectively support the opposite ends of the high-voltage box 72, the high-voltage box 72 can be implemented with fewer bracket devices 8 while reducing material usage and achieving fixation. Because multiple bracket mounting portions 81 are arranged circumferentially along the bracket support portion 82, it is beneficial to increase the connection area between the second bracket 8b and the bearing portion 311, thereby improving the connection strength between the second bracket 8b and the bearing portion 311.

[0467] In some embodiments, such as Figure 18 As shown, the support portion 82 in the second bracket 8b has an opening 821.

[0468] This application does not specifically limit the size and shape of the opening 821.

[0469] For example, within the same projection plane along a third direction, the projection of the opening 821 at least partially overlaps with the projection of the protective cover 313.

[0470] In this embodiment, since the support portion 82 in the second bracket 8b has an opening 821, the weight of the second bracket 8b can be improved, thereby improving the weight of the battery device 100.

[0471] In some embodiments, such as Figure 13 and Figure 14 As shown, the battery device 100 also includes a wiring harness (not shown) and a plurality of wire fasteners connected to the support portion 311 along a third direction away from the side of the battery cell pack 10. At least one wire fastener is a first wire fastener 91, which includes a base 911 and a wire fastening portion 912. Along the third direction, the base 911 is connected between the wire fastening portion 912 and the support portion 311. The wire fastening portion 912 has a wire through hole 9121, through which the wiring harness passes and is fixed to the wire fastening portion 912. The third direction intersects with the first direction.

[0472] The wiring harness electrically connects various electrical components in the battery device 100.

[0473] For example, a plurality of fasteners are connected to the side of the support portion 311 facing away from the battery cell pack 10 along a third direction. Of course, the fasteners can also be connected to the side of the side beam 21 facing the battery cell pack 10. Of course, the fasteners can also be connected to the side of the bracket device 8 facing away from the battery cell pack 10.

[0474] The wire hole 9121 passes through the wire fixing part 912.

[0475] For example, the number of wire through holes 9121 is at least two, wherein at least one wire through hole 9121 penetrates the wire fixing portion 912 along a first direction, and at least another wire through hole 9121 penetrates the wire fixing portion 912 along a second direction.

[0476] For example, when projected along a third direction, the projection of the fixed part 912 is within the range of the projection of the base 911.

[0477] In this embodiment, since the battery device 100 also includes a first wire fixing member 91, the first wire fixing member 91 can fix the relative position of the wire harness, thereby improving the neatness of the wire harness in the battery device 100. Moreover, since the wire fixing part 912 has a wire through hole 9121, the wire harness passes through the wire through hole 9121 and is fixed to the wire fixing part 912. Therefore, the first wire fixing member 91 can be applied to areas with relatively small wiring space within the battery device 100.

[0478] In some embodiments, such as Figure 18As shown, the battery device 100 also includes a wiring harness and a plurality of wire fasteners connected to the support portion 311 on the side away from the battery cell pack 10 in a third direction. At least one wire fastener is a second wire fastener 92. The second wire fastener 92 includes a first wire fastener wall 921, a second wire fastener wall 922, and a third wire fastener wall 923 connected in sequence. The first wire fastener wall 921 and the third wire fastener wall 923 are arranged opposite each other in a third direction. The first wire fastener wall 921 is connected to the support portion 311. The wiring harness is located between the first wire fastener wall 921 and the third wire fastener wall 923 and fixed to the second wire fastener 92. The third direction intersects with the first direction.

[0479] In some embodiments, the second wire fastener 92 is C-shaped. Of course, the second wire fastener 92 can also be other shapes that conform to the above description.

[0480] In some embodiments, the first wire fixing wall 921 and the third wire fixing wall 923 are arranged opposite each other along a third direction, and the second wire fixing member 92 is not provided with a wire fixing wall at the position opposite to the second wire fixing wall 922.

[0481] For example, the surface of the first fixed wall 921 facing the support portion 311 in the third direction is a plane. Of course, the surface of the first fixed wall 921 facing the support portion 311 in the third direction can also be a curved surface with a slight curvature.

[0482] For example, the third fixed wall 923 has a first gap.

[0483] In this embodiment, since the battery device 100 also includes a second wire fixing member 92, the second wire fixing member 92 can fix the relative position of the wire harness, thereby improving the neatness of the wire harness in the battery device 100. Moreover, since the second wire fixing member 92 includes a first wire fixing wall 921, a second wire fixing wall 922, and a third wire fixing wall 923 connected in sequence, with the first wire fixing wall 921 and the third wire fixing wall 923 arranged opposite each other along a third direction, and the wire harness is fixed to the second wire fixing member 92 between the first wire fixing wall 921 and the third wire fixing wall 923, the first wire fixing member 91 can be used for wire harnesses with cable ties, making it convenient for the portion of the wire harness with cable ties to enter the second wire fixing member 92 through its position relative to the second wire fixing wall 922.

[0484] In some embodiments, such as Figure 14As shown, the battery device 100 also includes a wiring harness and a plurality of wire fasteners connected to the support portion 311 along a third direction away from the battery cell pack 10. At least one wire fastener is a third wire fastener 93. The third wire fastener 93 includes a wire fastener body portion 931 and wire fastener connecting portions 932 connected to opposite sides of the wire fastener body portion 931. The wire fastener connecting portions 932 are connected to the support portion 311. Along the third direction, the wire fastener body portion 931 protrudes relative to the wire fastener connecting portions 932 along the side away from the support portion 311. The wire fastener body portion 931 and the support portion 311 form a through hole. The wiring harness passes through the through hole and is fixed to the third wire fastener 93. The third direction intersects with the first direction.

[0485] In some embodiments, the third wire fastener 93 is U-shaped. Of course, the third wire fastener 93 can also be other shapes that conform to the above description.

[0486] For example, the main body portion 931 of the wire fixing has a second gap.

[0487] For example, the wire fixing body 931 includes a first wire fixing body segment and second wire fixing bodies connected to opposite ends of the first wire fixing body segment. The second wire fixing bodies are connected between the first wire fixing body segment and the wire fixing connection portion 932. In the third direction, the first wire fixing body segment is further away from the bearing portion 311 than the wire fixing connection portion 932.

[0488] For example, the first wire-fixing body segment, the second wire-fixing body, and the bearing portion 311 surround each other to form a through hole.

[0489] This application does not specify the exact shape and size of the through hole, as long as it allows the wire harness to pass through.

[0490] For example, the surface of the wire connection portion 932 facing the support portion 311 in the third direction is a plane. Of course, the surface of the wire connection portion 932 facing the support portion 311 in the third direction can also be a curved surface with a slight curvature.

[0491] In this embodiment, the battery device 100 further includes a third wire fixing member 93, which can fix the relative position of the wire harness and improve the regularity of the wire harness in the battery device 100. Furthermore, since the third wire fixing member 93 includes a wire fixing body portion 931 and wire fixing connecting portions 932 connected to opposite sides of the wire fixing body portion 931, and the wire fixing connecting portions 932 are connected to the support portion 311, the connection strength between the third wire fixing member 93 and the support portion 311 can be improved, reducing the probability that the wire harness fixed to the third wire fixing member 93 will move due to insufficient fixing strength.

[0492] In some embodiments, the plate pulling device is a fiber composite plate 3.

[0493] In this embodiment, the fiber composite plate 3 uses fiber composite material, which is lightweight and has high strength. This helps to reduce the weight of the battery device 100 while improving the structural strength of the housing component 2 and increasing the energy density of the battery device 100.

[0494] In some embodiments, the fiber composite sheet 3 includes a first substrate and a first fiber, the first fiber being a continuous fiber, and the sheet pulling device includes a main body 3a, in which the first fiber extends along a first direction.

[0495] In this embodiment of the application, the first fiber in the fiber composite sheet 3 is configured to extend along the first direction, which can improve the modulus and strength of the fiber composite sheet 3 along the first direction, thereby improving the modulus and strength of the box assembly 2 along the first direction.

[0496] In some embodiments, the first wall 22 includes an insulating structure layer 2a and a fiber composite material layer 2b stacked together, with the insulating structure layer 2a located between the fiber composite material layer 2b and the battery cell assembly 10 along the thickness direction of the first wall 22.

[0497] In this embodiment, the insulating structure layer 2a serves both to support the battery cell assembly 10 and to electrically isolate the battery cell assembly 10 from the outside world, reducing external interference to the battery cell assembly 10. The combination of the insulating structure layer 2a and the fiber composite material layer 2b helps the housing assembly 2 to balance structural strength and protective performance.

[0498] In some embodiments, the first pull plate 31 is connected to the housing of the battery cell 11 that is exposed to the busbar.

[0499] In this embodiment, the degree of freedom in connecting the first pull plate 31 and the battery cell 11 is increased.

[0500] In some embodiments, the first pull plate 31 forms an insulating layer on the side facing the battery cell 11.

[0501] In this embodiment, since the first pull plate 31 may come into direct or indirect contact with the battery cell 11, an insulating layer is formed on the side of the first pull plate 31 facing the battery cell 11, thereby improving the reliability of the battery device.

[0502] In some embodiments, the plate pulling device includes a main body 3a, and an adhesive layer is disposed on the side of the main body 3a facing the battery cell 11.

[0503] In this embodiment, it helps to improve the connection strength between the first pull plate 31 and the battery cell 11 and reduce the connection difficulty.

[0504] In some embodiments, a second aspect of this application provides an electrical device, which includes the battery device described above.

[0505] This reduces the wear and tear on the battery cell pack 10 in the electrical device.

[0506] In some embodiments, the electrical device includes the aircraft 1000.

[0507] This reduces the wear and tear on the battery cell packs 10 in the aircraft 1000.

[0508] In a specific embodiment, such as Figures 13 to 19 As shown, the first pull plate 31 is bonded to the busbar 4 with structural adhesive. The first pull plate 31 extends to the side beam 21 of the housing assembly 2 and is connected to the side beam 21. The first pull plate 31 is covered by the lower housing of the housing assembly 2 using structural adhesive and rivets to improve the ability of the battery cell pack 10 to resist expansion forces. The first pull plate 31 includes a supporting part 311, a clearance part 312, and a reinforcing part. The reinforcing part is thickened and reinforced, and the clearance part 312 is hollowed out so that the clearance part 312 can avoid the sampling component 5. A protective cover 313 is made of low-density material and covers the weight reduction hole 3121 of the clearance part 312.

[0509] To meet the installation requirements of the high-voltage box 72 and the main control module 71, the bracket assembly is disassembled into separate bracket devices 8. By combining multiple separate bracket devices 8, the installation strength of the high-voltage box 72 and the main control module 71 is improved. According to the different fixing scenarios such as wire harnesses and busbars 4, multiple bracket devices 8 are designed. The bracket devices 8 are bonded to the first pull plate 31 with structural adhesive.

[0510] The first pull plate 31 includes a main body 3a, which has a clearance part 312 and a support part 311. The first pull plate 31 also includes a reinforcing part 314 and a connecting part 3b. The connecting part 3b has a hole. The adhesive application area of ​​the support part 311 is correspondingly provided with the busbar 4. The busbar 4 is connected to the adhesive application area of ​​the support part 311. There is structural adhesive between the busbar 4 and the support part 311.

[0511] The area where the main body 3a and the connecting part 3b are connected is subjected to greater stress and is prone to breakage due to the tensile strength of the side beam 21. The reinforcing part 314 connects the main body 3a and the connecting part 3b, thereby improving the strength of the reinforcing part 314.

[0512] The weight reduction hole 3121 is set in correspondence with the sampling component 5. Due to the presence of the sampling transmission component and the signal processing component, the first pull plate 31 needs to be set with an empty area. Due to the protection requirements of the sampling component 5, the protective cover 313 covers the weight reduction hole 3121, thereby protecting the sampling component 5.

[0513] The protective cover 313 is bonded to the first pull plate 31 via double-sided adhesive on the flange surface. To further improve assembly accuracy and connection reliability, the protective cover 313 is designed with rivet holes and is riveted to the main body 3a using plastic rivets. The main body 3a integrates various support devices 8, including second supports 8b for supporting and fixing the high-voltage box 72, and wire harness fixing components. At least two first supports 8a are used to fix the main control module 71, and at least two second supports 8b are used to support the same high-voltage box 72. Since the main force path of the high-voltage box 72 is from the fifth connector 65 to the first pull plate 31, the non-load-bearing material in the middle of the second supports 8b is removed, resulting in a combination design of three second supports 8b. This design improves the lightweighting of the battery device 100 while meeting the installation and strength requirements of the high-voltage box 72. The support device 8 supporting the main control module 71 also adopts a split design. Considering the design flawless requirements, the structure of the support device 8 supporting the same main control module 71 is identical, and the position of the fifth connector 65 is designed according to the mounting hole position of the main control module 71. Considering the need to secure the low-voltage wiring harness above the battery cell pack 10 and the connecting busbar 4, several wiring fasteners were designed. The second wiring fastener 92 is suitable for wiring harnesses with plastic cable ties featuring cedar tips, and is suitable for scenarios with ample space along a third direction. The third wiring fastener 93 has a relatively large adhesive application surface, suitable for wiring harnesses requiring higher strength. The first wiring fastener 91 is suitable for securing wiring harnesses where space is limited and strength requirements are not high.

[0514] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0515] The above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, The battery device includes: A housing assembly for defining a receiving cavity, the housing assembly including a first wall; A battery cell assembly is disposed within the receiving cavity. The battery cell assembly includes multiple battery cells, which are stacked along a first direction and supported by the first wall. A plate-pulling device includes at least one first plate that covers at least a portion of the terminal posts of the battery cell group from the side of the battery cell group away from the first wall. A busbar is located between the battery cell assembly and the first pull plate; The first pull plate is connected to the busbar and / or the housing of the battery cell.

2. The battery device according to claim 1, characterized in that, The pull plate device includes a main body, and the main body of the first pull plate includes a support part, which is connected to the busbar.

3. The battery device according to claim 2, characterized in that, The supporting part is bonded to the manifold.

4. The battery device according to claim 2, characterized in that, The number of battery cell groups is multiple, and the multiple battery cell groups are arranged along the second direction to form a battery cell array, the second direction intersecting the first direction; The battery device further includes a sampling component, which is electrically connected to the battery cell group. The thickness direction of the first wall is a third direction, which intersects the first direction and the second direction respectively. Along the third direction, the sampling component is located between the battery cell group and the first pull plate. The main body of the first pull plate also includes a clearance portion connected to at least one side of the corresponding support portion along the second direction. The clearance portion covers the sampling component and protrudes from the support portion along the third direction away from the first wall to avoid the sampling component.

5. The battery device according to claim 4, characterized in that, The clearance portion has a weight-reducing hole that penetrates the clearance portion in a third direction; The main body of the first pull plate also includes a protective cover, which is connected to the side of the avoidance portion away from the battery cell pack in the third direction. The protective cover covers the weight reduction hole, and the density of the material of the protective cover is less than the density of the material of the avoidance portion.

6. The battery device according to claim 5, characterized in that, The protective cover includes multiple protective walls that surround to form a protective cavity. The protective cover also has a protective opening that communicates with the protective cavity. The protective opening faces the weight reduction hole along the first direction, and a portion of the sampling component passes through the protective opening and is located inside the protective cavity.

7. The battery device according to claim 6, characterized in that, The plurality of protective walls include a plurality of protective sidewalls, which surround to form the protective opening. The protective cover also includes a protective connecting wall, which is connected to the side of the protective sidewall facing away from the protective cavity, and the protective connecting wall is connected to the clearance part.

8. The battery device according to claim 7, characterized in that, The battery device further includes a first connector, which connects the protective connecting wall and the clearance portion along the third direction; and / or, the protective connecting wall and the clearance portion are at least bonded together.

9. The battery device according to any one of claims 5 to 8, characterized in that, The battery device also includes: The wiring harness is located inside the housing assembly; Electrical components are located within the housing assembly, and the electrical components are located on the side of the protective cover facing away from the battery cell pack along the third direction; The protective cover has a wire harness clearance opening through which the wire harness passes. One end of the wire harness is connected to the sampling component, and the other end of the wire harness is connected to the sampling component and / or the electrical component.

10. The battery device according to any one of claims 1 to 8, characterized in that, The housing assembly includes two side beams arranged opposite each other along a first direction. The two side beams are used to constrain the battery cell assembly. The side beams are connected to opposite ends of the first wall along the first direction. The pull plate device includes a main body and a connecting part. The connecting part is located at both ends of the main body along a first direction and is connected to the side beam.

11. The battery device according to claim 10, characterized in that, The side beam includes a second wall and a reinforcing member disposed on the second wall, and the connecting part is connected to the reinforcing member.

12. The battery device according to claim 11, characterized in that, The thickness direction of the first wall is a third direction, which intersects with the first direction; At least one of the reinforcing members is a first reinforcing member, and at least one of the second walls is a first sub-wall. The first reinforcing member is connected to the side of the first sub-wall facing away from the first wall in the third direction, and the side of the first sub-wall facing away from the battery cell group in the first direction extends beyond the side of the first reinforcing member facing away from the battery cell group in the first direction. At least one of the connecting portions is a first connecting portion, which is connected to the side of the first reinforcing member opposite to the battery cell assembly along the first direction.

13. The battery device according to claim 12, characterized in that, The first pull plate further includes a reinforcing portion connected to the first reinforcing member. The reinforcing portion is connected between the main body portion and the first connecting portion, and the thickness of the reinforcing portion along the third direction is greater than the thickness of the main body portion along the third direction.

14. The battery device according to claim 13, characterized in that, The battery device also includes a second connector and a third connector. Along the third direction, the second connector connects the reinforcement and the first reinforcement; Along the first direction, the third connector connects the first connecting part and the first reinforcing member.

15. The battery device according to claim 10, characterized in that, The battery device also includes a sampling component, and the side beam has at least one clearance groove, with a portion of the sampling component located within the clearance groove.

16. The battery device according to any one of claims 11 to 14, characterized in that, The thickness direction of the first wall is a third direction, which intersects with the first direction; At least one of the reinforcing members is a second reinforcing member, and at least one of the second walls is a second sub-wall. The second reinforcing member is connected to the side of the second sub-wall facing the battery cell assembly along the first direction. At least one of the connecting parts is a second connecting part. The second connecting portion is connected to the side of the second reinforcing member that is away from the first wall along the third direction.

17. The battery device according to claim 16, characterized in that, Along the third direction, the thickness of the second connecting portion is greater than the thickness of the main body portion.

18. The battery device according to claim 17, characterized in that, The battery device also includes a fourth connector. Along the third direction, the fourth connector connects the second connecting part and the second reinforcing member.

19. The battery device according to any one of claims 4 to 8, characterized in that, Also includes: A bracket device is located inside the housing assembly. The bracket device includes a bracket mounting part and a bracket support part connected to the bracket mounting part. The bracket mounting part is connected to the side of the bearing part away from the battery cell group along the third direction. Along the third direction, the bracket support part is further away from the battery cell group than the clearance part, and the bracket support part spans the opposite sides of the clearance part along the second direction. An electrical component is located within the housing assembly and is connected to the side of the bracket support portion facing away from the battery cell assembly along the third direction.

20. The battery device according to claim 19, characterized in that, Support brackets for the same electrical component are spaced apart.

21. The battery device according to claim 19, characterized in that, Also includes: A fifth connector, located within the housing assembly, includes a connecting body and a flange connected to the outer peripheral surface of the connecting body. At least a portion of the connecting body passes through the bracket support and the electrical assembly. The flange contacts the side of the bracket support facing the battery cell assembly in the third direction.

22. The battery device according to claim 21, characterized in that, The flange is bonded to the side of the bracket support portion facing the battery cell assembly along the third direction.

23. The battery device according to claim 22, characterized in that, An adhesive is used between the flange and the support portion of the bracket, and the flange has a through hole. Projecting along the third direction, the projection of the through hole at least partially overlaps with the projection of the adhesive.

24. The battery device according to claim 19, characterized in that, The electrical components include a main control module; The plurality of the bearing portions and the clearance portions are arranged alternately in sequence along the second direction; At least one support device is a first support, the first support includes a plurality of support mounting parts and a plurality of support supporting parts arranged alternately along a second direction, the first support spans a plurality of the clearance parts along the second direction, and the plurality of support supporting parts are connected to the main control module.

25. The battery device according to claim 19, characterized in that, The electrical components include a high-voltage box; At least two support devices are second supports, and a plurality of the support mounting portions in the second supports are arranged at circumferential intervals along the support portion, and at least two second supports respectively support the opposite ends of the high voltage box.

26. The battery device according to claim 25, characterized in that, The support portion of the second bracket has an opening.

27. The battery device according to any one of claims 2 to 8, characterized in that, It also includes wiring harnesses and multiple fasteners connected to the third-party side of the carrier portion away from the battery cell assembly. At least one wire fixing component is a first wire fixing component, the first wire fixing component includes a base and a wire fixing part. Along the third direction, the base is connected between the wire fixing part and the bearing part. The wire fixing part has a wire passing hole, and the wire bundle passes through the wire passing hole and is fixed to the wire fixing part. The third direction intersects the first direction.

28. The battery device according to any one of claims 2 to 8, characterized in that, It also includes wiring harnesses and multiple fasteners connected to the third-party side of the carrier portion away from the battery cell assembly. At least one wire fixing component is a second wire fixing component, the second wire fixing component includes a first wire fixing wall, a second wire fixing wall and a third wire fixing wall connected in sequence, the first wire fixing wall and the third wire fixing wall are arranged opposite each other along the third direction, the first wire fixing wall is connected to the bearing part, the wire harness is located between the first wire fixing wall and the third wire fixing wall and fixed to the second wire fixing component, the third direction intersects the first direction.

29. The battery device according to any one of claims 2 to 8, characterized in that, It also includes wiring harnesses and multiple fasteners connected to the third-party side of the carrier portion away from the battery cell assembly. At least one wire fixing component is a third wire fixing component, the third wire fixing component includes a wire fixing body portion and wire fixing connecting portions connected to opposite sides of the wire fixing body portion, the wire fixing connecting portions are connected to the bearing portion, along the third direction, the wire fixing body portion protrudes relative to the wire fixing connecting portion on the side away from the bearing portion, the wire fixing body portion and the bearing portion surround to form a through hole, the wire bundle passes through the through hole and is fixed to the third wire fixing component, the third direction intersects the first direction.

30. The battery device according to any one of claims 1 to 8, characterized in that, The plate pulling device is a fiber composite plate pulling device.

31. The battery device according to claim 30, characterized in that, The fiber composite sheet includes a first substrate and a first fiber, wherein the first fiber is a continuous fiber, and the sheet-pulling device includes a main body in which the first fiber extends along the first direction.

32. The battery device according to any one of claims 1 to 8, characterized in that, The first wall includes an insulating structural layer and a fiber composite material layer stacked together. Along the thickness direction of the first wall, the insulating structural layer is located between the fiber composite material layer and the battery cell assembly.

33. The battery device according to any one of claims 1 to 8, characterized in that, The first pull plate is connected to the housing on the shoulder of the battery cell, which is exposed to the busbar.

34. The battery device according to any one of claims 1 to 8, characterized in that, An insulating layer is formed on the side of the first pull plate facing the battery cell.

35. The battery device according to any one of claims 1 to 8, characterized in that, The plate pulling device includes a main body, and an adhesive layer is provided on the side of the main body facing the battery cell.

36. An electrical device comprising the battery device according to any one of claims 1 to 35.

37. The electrical appliance according to claim 36, characterized in that, The electrical equipment includes aircraft.

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