Battery device and electric device

Abstract

The application provides a battery device and a power utilization device. The battery device comprises a box body (20), a plurality of battery cell assemblies (300) and a busbar (50); the box body has a containing space (201); the plurality of battery cell assemblies are arranged along a first direction and are arranged in the containing space; at least one battery cell assembly comprises a real battery cell (301) and a false battery cell (302); the false battery cell is located at at least one end of the corresponding battery cell assembly along a second direction; the busbar comprises a first jumper row (51); at least part of the first jumper row is arranged in a third direction of the false battery cell; a fixing structure (41) is arranged on the false battery cell; and the fixing structure is connected with the first jumper row. By arranging the fixing structure on the false battery cell, the layout and arrangement of the fixing structure are facilitated, the first jumper row is fixed, and therefore, the fixing structure does not need to be secondarily processed and arranged on the beam body of the box body, and the manufacturing process of the battery device can be simplified.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and more particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] A fixing strap is often arranged on the limiting beam of the box body of the battery device to fix the cross-over bus bar, which is inconvenient to process and manufacture. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiments of the application is to provide a battery device and a power utilization device to improve the problem of inconvenient processing and manufacturing of straps on the beam body of the battery device in the related art.

[0005] In a first aspect, the embodiments of the application provide a battery device, comprising:

[0006] a box body having a containing space;

[0007] a plurality of battery cell assemblies arranged in the containing space, the plurality of battery cell assemblies are arranged along a first direction, at least one battery cell assembly comprises a real battery cell and a false battery cell arranged along a second direction, and the false battery cell is located at at least one end of the corresponding battery cell assembly along the second direction;

[0008] a bus member electrically connected to the plurality of real battery cells, the bus member comprising a first cross-over row, at least part of the first cross-over row is arranged in a third direction of the false battery cell, the first direction is perpendicular to the second direction, the first direction is perpendicular to the third direction, and the second direction is perpendicular to the third direction;

[0009] The false battery cell is provided with a fixing structure, the fixing structure is connected to the first cross-over row, and the fixing structure is used for fixing the first cross-over row.

[0010] In the technical scheme of the embodiments of the application, the fixing structure is arranged on the false battery cell, which facilitates the layout and arrangement of the fixing structure, and facilitates the fixing of the first cross-over row through the fixing structure on the false battery cell, so that the fixing structure does not need to be arranged on the beam body of the box body, and the manufacturing process of the battery device can be simplified.

[0011] In some embodiments, at least one end of each of two adjacent battery cell assemblies is provided with a false battery cell, the first cross-over row passes through the third direction of the two adjacent false battery cells, and the first cross-over row is used for electrically connecting two real battery cells adjacent to the two false battery cells along the second direction.

[0012] The first cross-connection row is used to electrically connect the adjacent two battery cell assemblies, and the fixing structure on the dummy battery cell at the end of the two battery cell assemblies can fix the first cross-connection row.

[0013] In some embodiments, the size of the dummy battery cell is greater than or equal to the size of one real battery cell along the first direction.

[0014] The length of the dummy battery cell is greater than or equal to the length of one real battery cell, which can facilitate the adaptation of the dummy battery cell to the size of the battery cell assembly along the first direction, so as to facilitate the arrangement and assembly of the battery cell assembly.

[0015] In some embodiments, at least one end of the adjacent two battery cell assemblies is provided with a dummy battery cell, the first cross-connection row passes through the third direction of the adjacent two dummy battery cells, and the first cross-connection row is used to electrically connect the two real battery cells adjacent to the two dummy battery cells along the second direction.

[0016] The first cross-connection row is used to electrically connect the adjacent two battery cell assemblies, and the fixing structure on the dummy battery cell at the end of the two battery cell assemblies can fix the first cross-connection row.

[0017] In some embodiments, the size of the dummy battery cell is greater than or equal to the size of one real battery cell along the first direction.

[0018] The length of the dummy battery cell is greater than or equal to the length of one real battery cell, which can facilitate the adaptation of the dummy battery cell to the size of the battery cell assembly along the first direction, so as to facilitate the arrangement and assembly of the battery cell assembly.

[0019] In some embodiments, the fixing structure includes a cable tie, and the cable tie is used to bundle and connect the first cross-connection row.

[0020] The cable tie is used to bundle and fix the first cross-connection row, which is simple in structure, low in cost, and convenient to assemble.

[0021] In some embodiments, the dummy battery cell is provided with a jack, the cable tie includes a socket and a cable tie body, the cable tie body is installed on the socket, the socket is inserted into the jack, and the cable tie body is used to bundle the first cross-connection row.

[0022] The cable tie body is provided to connect the first cross-connection row, the socket is provided to fix the cable tie body, the jack is provided on the dummy battery cell, and the socket is inserted into the jack, which can facilitate the fixation of the socket on the dummy battery cell, and further fix the cable tie body on the dummy battery cell, which is convenient to assemble.

[0023] In some embodiments, the first recess is arranged on the dummy battery monomer to accommodate the socket, and the socket is arranged at the bottom of the first recess.

[0024] By the above technical solution, the first recess is arranged on the dummy battery monomer, so that the part of the socket protruding out of the socket hole can be positioned in the first recess when the socket is inserted into the socket hole, so that the top surface of the dummy battery monomer along the third direction can have a larger area in contact with the first jumper row to stably support the first jumper row.

[0025] In some embodiments, the second recess is arranged on the dummy battery monomer, the first recess is arranged at the bottom of the second recess, the depth size of the first recess is greater than the depth size of the second recess, and the size of the first recess along the second direction is smaller than the size of the second recess.

[0026] By the above technical solution, the second recess is arranged on the dummy battery monomer, and the first recess is arranged at the bottom of the second recess, so that the depth of the first recess is greater than the depth of the second recess, and the size of the first recess along the second direction is smaller than the size of the second recess. A stepped structure can be formed on the first recess of the dummy battery monomer to improve the structural strength of the top surface of the dummy battery monomer.

[0027] In some embodiments, a strip-shaped baffle is protrudingly arranged on the side of the top surface of the dummy battery monomer facing the real battery monomer.

[0028] By the above technical solution, the strip-shaped baffle is arranged on the side of the dummy battery monomer facing the real battery monomer, so that the strip-shaped baffle protrudes out of the top surface of the real battery monomer, and the risk of cracking at the connection between the end cover and the shell of the real battery monomer can be reduced.

[0029] In some embodiments, a first dummy electrode terminal is protrudingly arranged on the top surface of the dummy battery monomer, and the first dummy electrode terminal is arranged on the side of the first jumper row away from the real battery monomer to limit the displacement of the first jumper row away from the real battery monomer.

[0030] By the above technical solution, the first dummy electrode terminal is arranged on the top surface of the dummy battery monomer, and the first dummy electrode terminal is arranged on the side of the first jumper row away from the real battery monomer, so that in the case of swelling deformation of the real battery monomer, the first dummy electrode terminal can resist the first jumper row, and then limit the swelling deformation of the real battery monomer.

[0031] In some embodiments, a second dummy electrode terminal is protrudingly arranged on the top surface of the dummy battery monomer, and the second dummy electrode terminal supports the first jumper row.

[0032] By the above technical solution, the second dummy electrode terminal is arranged on the dummy battery monomer, and the first jumper row passes above the second dummy electrode terminal, so that the first jumper row can be supported by the second dummy electrode terminal to be fixed.

[0033] In some embodiments, the fixing structure is located in the middle of the false battery cell along the first direction.

[0034] By the above technical solution, the fixing structure is arranged in the middle of the false battery cell along the first direction, so that the fixing structure can be conveniently positioned and the fixing structure can be conveniently arranged on the false battery cell.

[0035] In some embodiments, the false battery cell comprises a shell having an inner cavity, and the fixing structure is mounted on the shell.

[0036] By the above technical solution, the inner cavity is arranged in the false battery cell, so that the weight of the false battery cell can be reduced and the cost can be reduced.

[0037] In some embodiments, the false battery cell comprises a shell having an inner cavity, and the inner cavity is open on the side away from the real battery cell along the second direction.

[0038] By the above technical solution, the inner cavity of the false battery cell is arranged to be open on the side away from the real battery cell, so that the false battery cell can be conveniently processed and manufactured.

[0039] In some embodiments, the inner cavity is provided with a rib, and the rib is arranged to protrude from the side of the shell close to the real battery cell along the second direction towards the open side of the inner cavity.

[0040] By the above technical solution, the rib is arranged in the inner cavity, so that the structural strength of the false battery cell can be improved; and the rib extends from the bottom of the inner cavity towards the open side, so that the rib can be conveniently processed and manufactured.

[0041] In some embodiments, the rib is arranged in a grid shape.

[0042] By the above technical solution, the rib can be conveniently arranged and set, and the rib can be conveniently processed and manufactured.

[0043] In some embodiments, the rib comprises a plurality of first ribs arranged at intervals along the first direction, and each first rib extends along the third direction.

[0044] By the above technical solution, the plurality of first ribs extending along the third direction are arranged in the inner cavity, so that the structural strength of the false battery cell along the third direction can be improved.

[0045] In some embodiments, the rib comprises a plurality of second ribs arranged at intervals along the third direction, and each second rib extends along the first direction.

[0046] By the above technical solution, the plurality of second ribs extending along the first direction are arranged in the inner cavity, so that the structural strength of the false battery cell along the first direction can be improved.

[0047] In some embodiments, the shell is closed and flat towards the side wall of the real battery monomer.

[0048] By the above technical solution, the false battery monomer can be well supported by the real battery monomer to limit the expansion deformation of the real battery monomer.

[0049] In some embodiments, a buffer pad is arranged between the false battery monomer and the real battery monomer along the second direction.

[0050] By the above technical solution, the buffer pad arranged between the false battery monomer and the real battery monomer can play a good buffering effect, facilitating the packing of the false battery monomer and the real battery monomer.

[0051] In some embodiments, a glue layer is arranged on the side of the false battery monomer towards the real battery monomer along the second direction, and the glue layer is connected to the real battery monomer by adhesion.

[0052] By the above technical solution, the glue layer is arranged on the false battery monomer to be adhesively connected to the real battery monomer, and the glue layer is arranged on the periphery of the corresponding surface of the false battery monomer, which can more stably adhesively connect the false battery monomer to the real battery monomer.

[0053] In some embodiments, the glue layer is divided into four segments, and the four segments of the glue layer are arranged on the four edges of the false battery monomer, and the four segments of the glue layer are connected end to end to form a frame shape.

[0054] By the above technical solution, the glue layer is divided into four segments to be arranged on the four edges of the corresponding surface of the false battery monomer, which can facilitate the layout and arrangement of the glue layer.

[0055] In some embodiments, the size of the false battery monomer along the first direction is greater than or equal to the size of two real battery monomers.

[0056] By the above technical solution, the length of the false battery monomer is set to be greater than or equal to the length of two real battery monomers, which can facilitate the arrangement of the false battery monomer arranged at the end of the adjacent two battery monomer assemblies.

[0057] In some embodiments, a plurality of fixing structures are connected on the first cross-connection row along the first direction, and adjacent two fixing structures are arranged at intervals, and adjacent two fixing structures are arranged on adjacent two false battery monomers, respectively.

[0058] By the above technical solution, the first cross-connection row is fixed by using a plurality of fixing structures, which can stably fix the first cross-connection row; and adjacent two fixing structures are arranged on two false battery monomers, respectively, which can facilitate the layout of the fixing structures on the false battery monomers, and can make the structure of the false battery monomer stronger.

[0059] In some embodiments, the distance between the adjacent two fixing structures is in the range of 100mm-300mm.

[0060] By the above technical solution, the distance range of the two adjacent fixed structures is set to 100mm-300mm, so that the first jumper row can be stably fixed.

[0061] In some embodiments, the distance range between the two adjacent fixed structures is 150mm-200mm.

[0062] By the above technical solution, the first jumper row can be more stably fixed.

[0063] In some embodiments, along the second direction, the size of the dummy battery monomer is adapted to make the size of the battery monomer assembly where the dummy battery monomer is located equal to the size of the adjacent battery monomer assembly.

[0064] By the above technical solution, the overall size of the battery monomer assembly can be conveniently adjusted by the dummy battery monomer, so that the size of the two adjacent battery monomer assemblies is equal, so as to facilitate the assembly of the battery monomer assembly and the stable installation in the box.

[0065] In some embodiments, along the second direction or the third direction, the size of the dummy battery monomer is equal to the size of one real battery monomer.

[0066] By the above technical solution, the number of dummy battery monomers can be conveniently adjusted according to the accommodating space and the set capacity of the box, so as to adjust the capacity of the battery device.

[0067] In some embodiments, along the second direction, the size of the dummy battery monomer is greater than or equal to the size of two real battery monomers.

[0068] By the above technical solution, the width of the dummy battery monomer is set to be greater than or equal to the width of two real battery monomers, so that a smaller number of dummy battery monomers can be used to reduce the cost, and the dummy battery monomer has a larger width to install the fixed structure, which is convenient for the setting of the fixed structure.

[0069] In some embodiments, the first jumper row includes a conductive main body, the conductive main body is provided with a first insulating layer, and the conductive main body is wrapped with a second insulating layer at a position corresponding to the fixed structure.

[0070] By the above technical solution, the first insulating layer is arranged on the conductive main body of the first jumper row, which can play a good insulation protection effect, and the second insulating layer is arranged, and the fixed structure is connected to the second insulating layer, which can better protect the conductive main body and provide better insulation protection.

[0071] In some embodiments, the second insulating layer is arranged between the first insulating layer and the fixed structure.

[0072] And / or, the conductive body is provided with a third insulating layer, the third insulating layer is arranged between the first insulating layer and the conductive body.

[0073] Through the above technical scheme, the second insulating layer is arranged between the fixed structure and the first insulating layer, which can play a good protection effect and reduce the risk of the fixed structure wearing the first insulating layer; the third insulating layer arranged between the conductive body and the first insulating layer can improve the insulation performance.

[0074] In some embodiments, the dummy battery monomer is a plastic piece.

[0075] Through the above technical scheme, the dummy battery monomer uses a plastic piece, which is low in cost and convenient to process and manufacture.

[0076] In some embodiments, the box body includes a first beam, the first beam abuts the end of the battery monomer assembly in the second direction, and a buffer plate is arranged between the dummy battery monomer and the first beam.

[0077] Through the above technical scheme, the first beam is arranged to limit the expansion deformation of the battery monomer, and the buffer plate is arranged between the dummy battery monomer and the first beam to protect the dummy battery monomer.

[0078] In some embodiments, at least two adjacent battery monomer assemblies are provided with an end true battery monomer facing one end of the first beam in the second direction, the busbar includes a second jumper row, the second jumper row is used for electrically connecting the two adjacent end true battery monomers, the second jumper row is fixed on the first beam, and the size of the second jumper row is greater than the size of the first beam in the second direction.

[0079] Through the above technical scheme, the second jumper row is arranged to electrically connect the end true battery monomers of the two adjacent battery monomer assemblies, and the second jumper row is fixed on the first beam to facilitate the installation and fixation of the second jumper row.

[0080] In a second aspect, the embodiments of the present application provide a power consumption device, which includes the battery device as described in the above embodiments, and the battery device is used for storing or providing electric energy.

[0081] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0082] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or exemplary technical description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0083] Figure 1 Structure diagram of a vehicle according to some embodiments of the present application;

[0084] Figure 2 Structure diagram of a battery device according to some embodiments of the present application;

[0085] Figure 3 Structure diagram of a part of a battery device according to some embodiments of the present application;

[0086] Figure 4 Structure diagram of a real battery cell according to some embodiments of the present application;

[0087] Figure 5 Enlarged view of A in FIG. 1; Figure 3

[0088] Figure 6 Structure diagram of a part of a battery device according to some embodiments of the present application; Figure 3

[0089] Enlarged view of B in FIG. 1; Figure 7 Figure 6

[0090] Figure 8 Figure 6

[0091] Figure 9 Structure diagram of a part of a battery device according to some embodiments of the present application; Figure 3

[0092] Enlarged view of D in FIG. 1; Figure 10 Figure 9

[0093] Figure 11 Structure diagram of a part of a battery device according to some embodiments of the present application; Figure 3

[0094] Enlarged view of E in FIG. 1; Figure 12 Figure 11 Structure diagram of a part of a battery device according to some embodiments of the present application;

[0095] Figure 13

[0096] Figure 14 ​​​​​​​​​for Figure 13 Enlarged view of section F in the middle;

[0097] Figure 15 This is a schematic diagram of the structure of a dummy battery cell in some embodiments of this application;

[0098] Figure 16 for Figure 15 A rear view structural diagram of a single dummy battery cell;

[0099] Figure 17 This is a schematic diagram of the structure of a dummy battery cell in some other embodiments of this application;

[0100] Figure 18 This is a schematic diagram of the structure of the first crossbar in some embodiments of this application;

[0101] Figure 19 This is a front view schematic diagram of a portion of the structure of a battery device according to some embodiments of this application;

[0102] Figure 20 This is a schematic diagram of the structure of the pressure strip connecting the shoulders of two adjacent dummy battery cells in the battery device of some embodiments of this application.

[0103] The main markings in the attached figures are as follows:

[0104] 11. Vehicle; 111. Controller; 112. Motor;

[0105] 200. Battery assembly; 20. Housing; 201. Compartment space; 21. Top cover; 22. Base plate; 23. Frame; 24. Mounting beam; 25. Limiting beam; 26. Crossbeam; 27. First beam;

[0106] 300. Battery cell assembly; 3001. First battery cell cluster; 3002. Second battery cell cluster; 3011. Sub-battery module; 30. Battery cell; 301. Real battery cell; 302. Dummy battery cell; 31. Electrode assembly; 311. Main body; 312. Tab; 3121. Positive tab; 3122. Negative tab; 32. Outer shell; 321. Housing; 322. End cap; 3221. Separator; 3201. Liquid injection hole; 3202. Pressure relief mechanism; 33. Electrode terminal; 331. Real battery cell 3311 Positive terminal; 3312 Negative terminal; 332 Dummy electrode terminal; 3321 First dummy electrode terminal; 3322 Second dummy electrode terminal; 34 Current collector; 341 Positive current collector; 342 Negative current collector; 35 Insulating film; 36 Support plate; 37 Outer shell; 370 Inner cavity; 38 Rib; 381 First rib; 382 Second rib; 391 Socket; 392 First groove; 393 Second groove; 394 Strip baffle; 395 Receiving groove;

[0107] 41. Fixing structure; 410. Cable tie; 411. Cable tie body; 412. Socket; 42. Buffer pad; 43. Buffer plate; 44. Adhesive layer; 45. Partition;

[0108] 50. Busbar; 51. First bridging busbar; 511. Conductive body; 5111. First part; 5112. Second part; 512. First insulating layer; 513. Second insulating layer; 514. Third insulating layer; 52. Second bridging busbar; 53. First busbar; 54. Second busbar;

[0109] 60. Pressure strip; 601. Connecting part; 602. Protrusion; 61. First pressure strip; 611. First sub-strip; 612. Second sub-strip; 62. Second pressure strip; 63. Third pressure strip; 64. Sub-segment;

[0110] 71. Conductive busbar; 72. First buffer bar; 73. Second buffer bar;

[0111] X, length direction; Y, width direction; Z, height direction; M, first direction; N, second direction; G, third direction. Detailed Implementation

[0112] To make the technical problems, technical solutions, and beneficial effects to be solved by 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 are not intended to limit the scope of this application.

[0113] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0114] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0115] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0116] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0117] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0118] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0119] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces). "Several" means one or more, unless otherwise explicitly specified.

[0120] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0121] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0122] In the description of the embodiments of this application, unless otherwise expressly specified and limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it may be directly connected to or indirectly connected to the other element.

[0123] In the description of the embodiments in this application, unless otherwise expressly specified and limited, the technical term "proximity" refers to being close in location. For example, among three components A1, A2, and B, the distance between A1 and B is greater than the distance between A2 and B. Therefore, A2 is closer to B than A1, meaning A2 is adjacent to B, or B is adjacent to A2. Similarly, when there are multiple components C, namely C1, C2, ..., C... N If one of the C components, such as C2, is closer to the B component than the other C components, then B is adjacent to C2, or C2 is adjacent to B.

[0124] As the application fields of battery devices continue to expand, the market demand is also constantly increasing. Different electrical devices, especially different models of the same device, may require different battery capacities, and the number of individual battery cells in the battery pack will change with the required capacity. Furthermore, the external dimensions of the battery pack enclosure are often the same across different models of the same device. For models with smaller battery capacities, some battery cells need to be removed from the enclosure, creating empty spaces. These empty spaces not only lead to unstable installation of individual battery cells, but also cause problems. Since individual battery cells expand during charging and discharging, and the expansion cycles of cells within the same battery pack are roughly the same, when the enclosure is fully loaded, the expansion deformation of adjacent cells can interact and inhibit each other. However, if empty spaces exist, the cells around these empty spaces will lack constraint, leading to excessive expansion and damage, thus reducing the overall stability of the battery pack.

[0125] To reduce unused space while meeting the capacity requirements of the battery pack, it is necessary to redesign the shape of the casing, as well as the battery cell layout, processing equipment, and installation process, which greatly increases the cost of manufacturing.

[0126] In addition, multiple battery cells in a battery pack are often connected in series, parallel, or mixed connections using busbars. These busbars include bridging busbars, which electrically connect the battery cells at one end of two adjacent battery cell assemblies. Because bridging busbars are relatively long, their middle section often needs to be fixed when both ends of the bridging busbar are connected to the electrode terminals of two battery cells.

[0127] Currently, some battery devices typically use cable ties to secure the crossover busbars on a limiting beam within the housing. This requires secondary processing after the limiting beam is fabricated to accommodate the cable ties. However, this secondary processing of the limiting beam not only reduces its structural strength but also makes manufacturing inconvenient.

[0128] Based on the above considerations, in order to improve the problem of inconvenient processing and manufacturing of cable ties on the beam of battery devices in related technologies, this application provides a battery device that sets up multiple battery cell assemblies, and one or more of the battery cell assemblies include dummy battery cells. This allows for the selection of an appropriate number of real battery cells according to the design capacity, and dummy battery cells can be installed in the remaining empty spaces in the housing, thus eliminating the need to change the shape and size of the housing and reducing the manufacturing cost of the battery device. A busbar is provided to electrically connect the multiple real battery cells, enabling electrical connection between the real battery cells in the housing for outputting electrical energy or charging the real battery cells. The busbar uses a first bridging strip to achieve electrical connection between the end cells of two adjacent battery cell assemblies. The first bridging strip is positioned above the dummy battery cell along a third direction, and a fixing structure is provided on the dummy battery cell to fix the first bridging strip to the dummy battery cell, which in turn supports the first bridging strip. The fixing structure on the dummy battery cell facilitates the layout and installation of the fixing structure, and makes it easy to fix the first bridging strip through the fixing structure on the dummy battery cell. This eliminates the need for secondary processing and installation of the fixing structure on the beam of the housing, thereby simplifying the manufacturing process of the battery device.

[0129] The battery device disclosed in this application can be used in electrical devices, energy storage elements, energy storage systems, etc., that use a battery device as a power source. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0130] For ease of explanation, an electrical device is provided in one embodiment of this application, which is illustrated using a vehicle as an example.

[0131] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 11 provided in some embodiments of this application. The vehicle 11 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 200 is provided inside the vehicle 11, and the battery device 200 can be located at the bottom, front, or rear of the vehicle 11. The battery device 200 can be used to power the vehicle 11; for example, the battery device 200 can serve as the operating power source for the vehicle 11. The vehicle 11 may also include a controller 111 and a motor 112. The controller 111 is used to control the battery device 200 to supply power to the motor 112, for example, to meet the power needs of the vehicle 11 during starting, navigation, and driving.

[0132] In some embodiments, the battery device 200 can not only serve as the operating power source for the vehicle 11, but also as the driving power source for the vehicle 11, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 11.

[0133] Please refer to Figure 2 The battery device 200 mentioned in the embodiments of this application may include one or more battery cell assemblies 300 for providing voltage and capacity. The battery cell assembly 300 may include multiple battery cells 30, which are connected in series, parallel or mixed connection through a busbar.

[0134] In some embodiments, the battery cell assembly 300 is typically formed by arranging multiple battery cells 30.

[0135] As an example, the battery cell assembly 300 can be a battery module, which is formed by arranging and fixing multiple battery cells 30 together. As an example, the battery module can be formed by bundling multiple battery cells 30 together with cable ties.

[0136] In some embodiments, the battery device 200 may be a battery pack, which includes a housing 20 and one or more battery cell assemblies 300, the battery cell assemblies 300 being housed in the housing 20.

[0137] As an example, the battery cell assembly 300 can be a battery module, which can be housed in the housing 20 by fixing the battery module in the housing 20.

[0138] As an example, the battery cell assembly 300 can also be housed in the housing 20 by directly fixing multiple battery cells 30 to the housing 20.

[0139] As an example, the housing 20 may include a top cover 21, a frame 23, and a bottom plate 22. The top cover 21 and the bottom plate 22 are respectively connected to opposite sides of the frame 23, so that the interior of the housing 20 forms a closed space to accommodate the battery cells 30. Here, "closed" means covered or closed, which can be sealed or unsealed. The frame 23 refers to the partial structure forming the peripheral sidewall of the housing 20, the top cover 21 refers to the plate-like structure forming the top of the housing 20, and the bottom plate 22 refers to the plate-like structure forming the bottom of the housing 20.

[0140] As an example, the housing 20 may include a first housing and a second housing, which are fastened together to form a closed space inside the housing 20 to house the battery cells 30. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed. The first housing may be the top cover or the bottom plate of the housing 20. The first and second housings may also be hollow structures, each open on one side, with the opening side of the first housing fitting over the opening side of the second housing.

[0141] In some embodiments, the housing 20 includes a mounting beam 24, which is fixedly connected to the frame 23 for connecting external devices using the battery device 200 to support the battery device 200 on those devices. Additionally, the mounting beam 24 can also be a structural component that increases the structural strength of the housing 20.

[0142] In some embodiments, the housing 20 includes a limiting beam 25 installed inside the housing 20 to increase the structural strength of the housing 20 and to support the battery cells 30, thereby limiting the expansion deformation of the battery cells 30. In some embodiments, a frame can also be used directly to support the battery cells and limit their expansion deformation, thus eliminating the need for a separate limiting beam 25.

[0143] In some embodiments, the limiting beam 25 can also be connected to the bottom plate 22 of the box 20 to better fix the limiting beam 25 in the box 20.

[0144] In some embodiments, where the box 20 includes a frame 23, the frame 23 may be referred to as the beam of the box 20.

[0145] In some embodiments, when the box body 20 includes a limiting beam 25, the limiting beam 25 may be referred to as the beam of the box body 20.

[0146] In some embodiments, when the box body 20 includes a frame 23 and a limiting beam 25, the frame 23 and the limiting beam 25 can be collectively referred to as the beam body of the box body 20.

[0147] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0148] Please see Figure 2 The box 20 has length, width, and height directions, such as Figure 2 As shown, the X direction represents the length of the housing 20, the Y direction represents the width of the housing 20, and the Z direction represents the height of the housing 20. Since the housing 20 defines the shape of the battery device 200, the length direction X is also the length of the battery device 200, the width direction Y is also the width of the battery device 200, and the height direction Z is also the height of the battery device 200.

[0149] In some embodiments, please refer to Figure 2The battery device 200 includes a plurality of battery cell assemblies 300, which are arranged along a first direction M, and the battery cells 300 of each battery cell assembly 300 are arranged along a second direction N. The first direction M is perpendicular to the second direction N. For example, the second direction N can be parallel to the length direction X of the housing 20, meaning the battery cells 30 of the battery cell assembly 300 can be arranged along the length direction X of the housing 20. For example, the second direction N can be parallel to the width direction Y of the housing 20, meaning the battery cells 30 of the battery cell assembly 300 can be arranged along the width direction Y of the housing 20. For example, the second direction N can be inclined to the length direction X of the housing 20, meaning the battery cells 30 of the battery cell assembly 300 can be arranged inclined to the length direction X of the housing 20.

[0150] In some embodiments, the battery cell 30 has a height, a length, and a width. The length of the battery cell 30 is greater than or equal to the width of the battery cell 30. After the battery cell 30 is installed in the housing 20, the direction of the height of the battery cell 30 is the third direction G. When the battery cell 30 is installed in the housing 20, the third direction G is consistent with the height direction Z of the housing 20.

[0151] Please see Figures 3 to 19 According to some embodiments of this application, this application provides a battery device 200, including a housing 20, a plurality of battery cell assemblies 300, and a busbar 50; the housing 20 has a receiving space 201; the plurality of battery cell assemblies 300 are arranged along a first direction M and disposed in the receiving space 201, at least one battery cell assembly 300 includes a real battery cell 301 and a dummy battery cell 302 arranged along a second direction N, the dummy battery cell 302 being located at at least one end of the corresponding battery cell assembly 300 along the second direction N; the busbar 50 is electrically connected to the plurality of real battery cells 301; the busbar 50 includes a first crossbar 51, at least a portion of the first crossbar 51 being disposed in a third direction G of the dummy battery cell 302, the first direction M being perpendicular to the second direction N, the first direction M being perpendicular to the third direction G, and the second direction N being perpendicular to the third direction G; the dummy battery cell 302 is provided with a fixing structure 41, the fixing structure 41 being connected to the first crossbar 51 for fixing the first crossbar 51.

[0152] The housing 20 refers to the structure in the battery device 200 used to provide fixed support for the battery cell 30 or other structures; the material of the housing 20 may include metal, plastic or other materials. The specific structure of the housing 20 can be as described in the above embodiments, and will not be repeated here.

[0153] The accommodating space 201 refers to the space structure in the housing 20 used to accommodate the battery cell 30 and other structures. The accommodating space 201 is formed inside the housing 20.

[0154] Multiple refers to two or more items.

[0155] Multiple battery cell modules 300 refers to a number of two or more battery cell modules 300.

[0156] The busbar 50 refers to the conductive component in the battery device 200 used to conduct electrical energy. The busbar 50 can be a conductive component made of copper busbar, aluminum busbar, wire, or other conductive materials. The busbar 50 electrically connects multiple actual battery cells 301 in the battery device 200 to realize the output and input of electrical energy.

[0157] The arrangement of multiple battery cell modules 300 along the first direction M means that in any two battery cell modules 300 within the receiving space 201, one battery cell module 300 is located on one side of the other battery cell module 300 along the first direction M. That is, each battery cell module 300 is installed in the receiving space 201, and these battery cell modules 300 are arranged along the first direction M within the receiving space 201. The first direction M is perpendicular to the height direction.

[0158] Each battery cell assembly 300 includes a plurality of battery cells 30 arranged along a second direction N. That is, each battery cell assembly 300 includes a plurality of battery cells 30, and the plurality of battery cells 30 in each battery cell assembly 300 are arranged along the second direction N. The second direction N is perpendicular to the height direction. The second direction N is perpendicular to the first direction M.

[0159] At least one battery cell assembly 300 refers to one or more battery cell assemblies 300 among a plurality of battery cell assemblies 300.

[0160] At least one battery cell assembly 300 includes genuine battery cells 301 and dummy battery cells 302 arranged along the second direction N, meaning that a plurality of battery cells 30 in one or more battery cell assemblies 300 include genuine battery cells 301 and dummy battery cells 302, and these genuine battery cells 301 and dummy battery cells 302 are arranged along the second direction N.

[0161] True battery cell 301 refers to battery cell 30 that can be used to store and release electrical energy.

[0162] A dummy battery cell 302 refers to a structure in the battery cell assembly 300 that replaces a genuine battery cell 301 and occupies an empty space in the receiving space 201. One dummy battery cell 302 can be used to replace only one genuine battery cell 301. In this case, the outer contour shape of the dummy battery cell 302 can be similar to or partially similar to the outer contour shape of a genuine battery cell 301. One dummy battery cell 302 can also be used to replace two or more genuine battery cells 301.

[0163] The dummy battery cell 302 being located at at least one end of the corresponding battery cell assembly 300 along the second direction N means that: in a battery cell assembly 300 having a dummy battery cell 302, the dummy battery cell 302 is provided at one end of the battery cell assembly 300 along the second direction N, or the dummy battery cell 302 is provided at both ends of the battery cell assembly 300 along the second direction N.

[0164] The term "busbar 50 electrically connects multiple real battery cells 301" means that multiple real battery cells 301 of the battery device 200 are connected in series, in parallel, or in a mixed configuration using the busbar 50.

[0165] The first crossover 51 refers to two real battery cells 301 used to connect one end of two adjacent battery cell assemblies 300, and is a busbar 50 connected to two real electrode terminals 331 located at both ends along the first direction M on the two real battery cells 301.

[0166] "At least a portion of the first crossbar 51 is located on the third direction G of the dummy cell 302" means that a portion of one or more first crossbars 51 is located on the third direction G of the dummy cell 302.

[0167] The third direction G refers to the direction in which the height of the dummy battery cell 302 is located. When the dummy battery cell 302 is installed in the housing 20, the third direction G is parallel to the height direction Z. Therefore, the first crossover bar 51 is located at the top of the dummy battery cell 302 in the third direction G.

[0168] The fixing structure 41 refers to the structure used to fix the first crossover row 51. As an example, the fixing structure 41 can use a clip, cable tie, or other similar structure. As an example, the fixing structure 41 can also use fasteners such as screws, bolts, and rivets.

[0169] The dummy battery cell 302 is equipped with a fixing structure 41, which means that the fixing structure 41 is installed on the dummy battery cell 302 to stably confine the first crossover bar 51 to the top of the dummy battery cell 302, preventing it from shifting or loosening due to vibration or thermal expansion and contraction. The fixing structure 41 can be manufactured separately and then fixed to the dummy battery cell 302 with fasteners such as screws and rivets. Alternatively, the fixing structure 41 can be integrally formed with the dummy battery cell 302, for example, by pre-setting slots or mounting holes on the top or side wall of the dummy battery cell 302, so that the first crossover bar 51 can be directly snapped in or screwed in; this integrated design not only simplifies the assembly process but also improves the overall structural integrity and vibration resistance.

[0170] Multiple battery cell assemblies 300 are provided, and one or more of the battery cell assemblies 300 include dummy battery cells 302. This allows for the selection of a corresponding number of real battery cells 301 according to the design capacity, and the dummy battery cells 302 can be installed in the remaining empty spaces in the housing 20 without changing the shape and size of the housing 20, thereby reducing the manufacturing cost of the battery device 200.

[0171] A busbar 50 is configured to electrically connect multiple real battery cells 301 to achieve electrical connection between the real battery cells 301 in the housing 20, so as to output electrical energy or charge the real battery cells 301. The busbar 50 uses a first bridge bar 51 to achieve electrical connection between the end real battery cells 301 of two adjacent battery cell assemblies 300. The first bridge bar 51 is located above the dummy battery cell 302 along the third direction G, and a fixing structure 41 is provided on the dummy battery cell 302 to fix the first bridge bar 51 to the dummy battery cell 302, and the dummy battery cell 302 supports the first bridge bar 51.

[0172] In the technical solution of this application embodiment, by setting a fixing structure 41 on the dummy battery cell 302, the layout and setting of the fixing structure 41 are facilitated, and the first crossbar 51 is easily fixed by the fixing structure 41 on the dummy battery cell 302, so that the fixing structure 41 is not required to be set on the beam of the box 20, thereby simplifying the manufacturing process of the battery device 200.

[0173] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 7 and Figure 12 At least one end of two adjacent battery cell assemblies 300 is provided with a dummy battery cell 302. A first bridging bar 51 passes through the third direction G of the two adjacent dummy battery cells 302. The first bridging bar 51 is used to electrically connect two real battery cells 301 that are adjacent to the two dummy battery cells 302 along the second direction N.

[0174] Having a dummy battery cell 302 at one end of at least two adjacent battery cell modules 300 means that among multiple battery cell modules 300, two or more adjacent battery cell modules 300 have a dummy battery cell 302 at one end.

[0175] One end of the battery cell module 300 refers to the end of the battery cell module 300 along the second direction N, which is also the end of the battery cell module 300 in the direction of the arrangement of multiple battery cells 30.

[0176] The first crossbar 51 passing through the third direction G of the two adjacent dummy battery cells 302 means that the first crossbar 51 passes over the top of the two adjacent dummy battery cells 302 along the third direction G. That is, the first crossbar 51 is at least partially located at the top of the two adjacent dummy battery cells 302 along the third direction G, so that the two adjacent dummy battery cells 302 can support the first crossbar 51, and also facilitate the connection of the fixing structure 41 on the dummy battery cells 302 to the first crossbar 51.

[0177] The first bridging strip 51 is used to electrically connect two real battery cells 301 adjacent to the two dummy battery cells 302 along the second direction N. This means that in the two battery cell assemblies 300 where the two dummy battery cells 302 are located, the two real battery cells 301 close to the two dummy battery cells 302 are electrically connected through the first bridging strip 51.

[0178] The above technical solution allows for convenient electrical connection of two adjacent battery cell assemblies 300 using the first jumper bar 51, and also facilitates the fixing structure 41 on the dummy battery cell 302 at the ends of the two battery cell assemblies 300 to fix the first jumper bar 51.

[0179] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 7 and Figure 12 Along the first direction M, the size of the dummy battery cell 302 is greater than or equal to the size of a real battery cell 301.

[0180] Along the first direction M, the size of the dummy battery cell 302 being greater than or equal to the size of a real battery cell 301 means that the size of the dummy battery cell 302 in the first direction M can be equal to or greater than the size of a real battery cell 301 in the first direction M, that is, the length of the dummy battery cell 302 being greater than or equal to the length of a real battery cell 301.

[0181] As an example, if the size of the dummy battery cell 302 in the first direction M is equal to the size of the real battery cell 301 in the first direction M, the dummy battery cell 302 and the real battery cell 301 can be conveniently arranged along the second direction N to form a battery cell assembly 300, which facilitates the grouping of the battery cell assembly 300.

[0182] As an example, if the size of the dummy battery cell 302 in the first direction M is larger than the size of the real battery cell 301 in the first direction M, the projection of the dummy battery cell 302 in the second direction N can better cover the real battery cell 301 so as to support the real battery cell 301 and thus more effectively suppress the expansion deformation of the real battery cell 301 during the charging and discharging process.

[0183] By using the above technical solution, the length of the dummy battery cell 302 is set to be greater than or equal to the length of a real battery cell 301, which makes it easy for the dummy battery cell 302 to adapt to the size of the battery cell assembly 300 along the first direction M, so as to facilitate the setting and assembly of the battery cell assembly 300.

[0184] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 7 and Figure 12 When the size of the dummy battery cell 302 in the first direction M is equal to the size of the real battery cell 301 in the first direction M, each dummy battery cell 302 is provided with a fixing structure 41 to connect and fix the first crossover row 51.

[0185] Please see Figure 4 In this embodiment of the application, the real battery cell 301 can be a secondary battery. A secondary battery refers to a battery cell 30 that can be used again after the real battery cell 301 has been discharged, by recharging to activate the active material.

[0186] The actual battery cell 301 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.

[0187] As an example, the actual battery cell 301 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.

[0188] Please see Figure 4Each battery cell 301 includes one or more electrode assemblies 31, also known as bare cells, which are components for storing and releasing electrical energy. When there are multiple electrode assemblies 31, they are connected in parallel.

[0189] In some embodiments, please refer to Figure 4 The electrode assembly 31 includes a main body 311, on which tabs 312 are provided. The main body 311 is the main part of the electrode assembly 31. The tabs 312 are used in the electrode assembly 31 to connect to an external circuit so that current can flow through the main body 311 during charging and discharging. The tabs 312 include a positive tab 3121 and a negative tab 3122, which are used to connect to the positive and negative terminals of the external circuit, respectively. The positive tab 3121 and the negative tab 3122 can be located on the same side of the main body 311 or on different sides of the main body 311, such as on opposite sides of the main body 311.

[0190] In some embodiments, the actual battery cell 301 includes an outer casing 32, which provides a accommodating space to house the electrode assembly 31 and provides support and protection for it. The outer casing 32 can be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as a copper-aluminum composite outer casing 32), or aluminum-plastic film. In some embodiments, the outer casing 32 can be a sealed structure or a non-sealed structure. As an example, when the outer casing 32 is a non-sealed structure, it protects the electrode assembly 31, and a sealing bag is included between the outer casing 32 and the electrode assembly 31. The sealing bag is used to encapsulate the electrode assembly 31 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the outer casing 32 is a sealed structure, it encapsulates the electrode assembly 31 and the electrolyte, among other components.

[0191] In some embodiments, the outer casing 32 includes an end cap 322 and a housing 321, the housing 321 having an opening, and the end cap 322 covering the opening. The housing 321 may have one or more openings. The end cap 322 may also have one or more.

[0192] End cap 322 refers to a component that covers the opening of housing 321 to isolate the internal environment of the actual battery cell 301 from the external environment. The shape of end cap 322 can be adapted to the shape of housing 321 to fit onto housing 321. Optionally, end cap 322 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 322 is not easily deformed when subjected to compression and impact, so that the actual battery cell 301 can have higher structural strength and improved reliability. The material of end cap 322 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application does not impose any special restrictions on it.

[0193] The housing 321 is a component used to cooperate with the end cap 322 to form the internal environment of the actual battery cell 301. This internal environment can accommodate the electrode assembly 31, electrolyte, and other components. The housing 321 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 321 can be determined according to the specific shape and size of the actual battery cell 301. The material of the housing 321 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic; this application does not impose any special limitations on this.

[0194] In some embodiments, the end cap 322 is fitted with an isolator 3221, which can be used to isolate electrical connection components within the housing 321 from the end cap 322 to reduce the risk of short circuits. Exemplarily, the isolator 3221 can be made of plastic, rubber, or the like.

[0195] In some embodiments, the outer shell 32 is provided with an injection hole 3201. The injection hole 3201 refers to a hole structure for injecting electrolyte into the outer shell 32. After the electrode assembly 31 is manufactured, it needs to be installed in the shell 321 and electrolyte is injected so that the electrode assembly 31 is immersed in the electrolyte and can fully absorb the electrolyte. The electrolyte can provide some active ions for use as conductive ions during the charging and discharging process; in addition, the electrolyte provides ion channels, or carriers, so that ions can move freely in them to achieve electrical conduction between the electrodes. The outer shell 32 is provided with an injection hole 3201 to add electrolyte into the outer shell 32.

[0196] As an example, the injection port 3201 can be provided on the housing 321. Of course, the injection port 3201 can also be provided on the end cap 322.

[0197] In some implementations, please refer to Figure 4 The outer casing 32 is provided with a pressure relief mechanism 3202. The pressure relief mechanism 3202 is used to release the internal gas of the actual battery cell 301.

[0198] As an example, the internal pressure or temperature of the genuine battery cell 301 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the genuine battery cell 301 reaches the predetermined threshold, the pressure relief mechanism 3202 is activated or a weak structure provided in the pressure relief mechanism 3202 is destroyed, thereby forming an opening or channel for the release of internal pressure or temperature. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator 3221 in the battery cell 30.

[0199] As an example, the pressure relief mechanism 3202 can be integrally formed with the outer shell 32.

[0200] As an example, the pressure relief mechanism 3202 can also be separately configured and connected to the outer shell 32.

[0201] The term "actuation" as used in this application refers to the pressure relief mechanism 3202 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the actual battery cell 301. The actions of the pressure relief mechanism 3202 may include, but are not limited to: movement of components within the pressure relief mechanism 3202 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 3202, etc. When the pressure relief mechanism 3202 is actuated, the high-temperature, high-pressure substances inside the actual battery cell 301 are discharged outwards from the actuated portion as waste. This method enables pressure and temperature relief in the actual battery cell 301 under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0202] In some embodiments, when the outer shell 32 is a non-sealed structure, the pressure relief mechanism 3202 can be configured as a through hole to discharge the gas inside the real battery cell 301.

[0203] The emissions from the real battery cell 301 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator 3221, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0204] In some implementations, please refer to Figure 4 The outer casing 32 has at least one true electrode terminal 331, which is electrically connected to the tab 312. The true electrode terminal 331 can be directly connected to the tab 312 or indirectly connected to it via a current collector. The true electrode terminal 331 can be located on the end cap 322 or on the casing 321. The true electrode terminal 331 refers to a conductive element located on the outer casing 32. It is connected to the tab 312 of the electrode assembly 31 to output electrical energy from the true battery cell 301 or to charge the true battery cell 301. The true battery cell 301 typically has two true electrode terminals 331: a positive terminal 3311 and a negative terminal 3312. The positive terminal 3311 is connected to the positive tab 3121 of the electrode assembly 31, and the negative terminal 3312 is connected to the negative tab 3122 of the electrode assembly 31.

[0205] In some embodiments, the actual battery cell 301 further includes current collectors 34. Generally, there are two current collectors 34, each corresponding to one of the two actual electrode terminals 331. Each tab 312 is connected to its corresponding actual electrode terminal 331 via the current collector 34, facilitating a more stable connection between the tab 312 and the actual electrode terminal 331. The two current collectors 34 are a positive current collector 341 and a negative current collector 342. The positive current collector 341 connects the positive tab 3121 to the positive terminal 3311, and the negative current collector 342 connects the negative tab 3122 to the negative terminal 3312. The current collectors 34 can be in the shape of a sheet, plate, or strip.

[0206] In some embodiments, the actual battery cell 301 includes an insulating film 35 that surrounds the electrode assembly 31 to bind the electrode assembly 31, thereby facilitating its insertion into the outer casing 32. The insulating film 35 also protects the electrode assembly 31. The insulating film 35 can be made of insulating materials such as polypropylene or polyethylene to effectively insulate the electrode assembly 31 from the outer casing 32, reducing the risk of internal short circuits in the actual battery cell 301.

[0207] In some embodiments, the actual battery cell 301 further includes a support plate 36, which is mounted in the outer casing 32 to support the electrode assembly 31. The support plate 36 provides better support for the electrode assembly 31 and reduces deformation of the electrode assembly 31's edges caused by the rounded corners of the outer casing 32. The support plate 36 can be made of materials such as ceramic, plastic, or silicone.

[0208] In some embodiments, please refer to Figure 4 Each battery cell 30 has a length, width, and height, wherein the length of the battery cell 30 is greater than its width. When the battery cell 30 is installed in the housing 20, the height direction of the battery cell 30 is consistent with the height direction Z of the housing 20. When multiple battery cells 30 are arranged along the second direction N to form a battery cell assembly 300, the width direction of the battery cell 30 is consistent with the second direction N, while the length direction of the battery cell 30 is consistent with the first direction M. When the battery cell 30 includes a genuine battery cell 301, the length direction of the battery cell 30 is the same as the length direction of the genuine battery cell 301, the width direction of the battery cell 30 is the same as the width direction of the genuine battery cell 301, and the height direction of the battery cell 30 is the same as the height direction of the genuine battery cell 301. When the battery cell 30 includes a dummy battery cell 302, the length direction of the battery cell 30 is the same as the length direction of the dummy battery cell 302, the width direction of the battery cell 30 is the same as the width direction of the dummy battery cell 302, and the height direction of the battery cell 30 is the same as the height direction of the dummy battery cell 302.

[0209] In some embodiments, please refer to Figure 3 , Figures 5 to 7 , Figures 9 to 12 The fixing structure 41 includes cable ties 410, which are used to bind and connect the first crossover row 51.

[0210] Cable tie 410 refers to a flexible ring-shaped fastener, typically made of polyester, nylon, or metal, with adjustable length and self-locking function. One end has a snap-fit ​​structure, and the other end has a toothed adjustment band; unidirectional locking is achieved through the engagement of the toothed band and the snap-fit. The flexible ring-shaped structure of cable tie 410 not only adapts to different sizes of the first crossover strip 51, but also maintains a constant preload under vibration and thermal expansion / contraction conditions, preventing loosening of the connection due to stress relaxation.

[0211] The above technical solution uses cable ties 410 to bind and fix the first crossover row 51, which has a simple structure, low cost, and is easy to assemble.

[0212] In some embodiments, please refer to Figure 3 , Figures 5 to 7 , Figures 9 to 17 The dummy battery cell 302 has a socket 391. The cable tie 410 includes a socket 412 and a cable tie body 411. The cable tie body 411 is installed on the socket 412, and the socket 412 is inserted into the socket 391. The cable tie body 411 is used to bind the first crossover bar 51.

[0213] The socket 391 refers to the hole structure that is opened on the top surface of the dummy battery cell 302 along the third direction G.

[0214] The socket 412 refers to a structural component with a plug extending from one end of the seat with a hole. The cable tie body 411 passes through the hole of the seat to be installed on the socket 412. The plug matches the socket 391, which can achieve quick positioning and stable insertion, thereby accurately fixing the cable tie body 411 to the top surface of the dummy battery cell 302.

[0215] The cable tie body 411 refers to the flexible annular fastener in the cable tie 410. The cable tie 410 is combined with the cable tie body 411 and the socket 412 to form an insert-type cable tie 410 for installation and fixation.

[0216] The above technical solution involves setting a cable tie body 411 to connect to the first crossover bar 51, setting a socket 412 to fix the cable tie body 411, and setting a socket 391 on the dummy battery cell 302, into which the socket 412 is inserted. This allows the socket 412 to be easily fixed to the dummy battery cell 302, thereby fixing the cable tie body 411 to the dummy battery cell 302, making assembly convenient.

[0217] In some embodiments, the cable tie 410 may consist only of the cable tie body 411, that is, the cable tie 410 may consist only of a flexible annular fastener. The cable tie body 411 can be welded, bonded, or clamped to the top surface of the dummy battery cell 302 to achieve reliable fixation in a structure without insertion holes 391; welding can be performed using laser welding or ultrasonic welding. As an example, the cable tie body 411 can also be fixedly installed to the top surface of the dummy battery cell 302 using fasteners such as rivets and screws.

[0218] In some embodiments, please refer to Figure 5 , Figures 11 to 17 The dummy battery cell 302 has a first groove 392 for accommodating the socket 412, and the socket 391 is located at the bottom of the first groove 392.

[0219] The first groove 392 refers to the groove structure provided on the top of the dummy battery cell 302. The insertion hole 391 located at the bottom of the first groove 392 means that the insertion hole 391 is provided on the bottom surface at the depth of the first groove 392. The depth of the first groove 392 is parallel to the third direction G.

[0220] The first groove 392 not only provides embedding space for the socket 412, but also forms a circumferential limit on the socket 412 through the groove wall, improving the insertion stability. In addition, the setting of the first groove 392 can also improve the structural strength of the top surface of the dummy battery cell 302. Moreover, since the socket 412 is inserted into the socket 391, there will inevitably be a part protruding from the socket 391, such as the perforated body of the socket 412 protruding from the socket 391. The setting of the first groove 392 can accommodate the perforated body of the socket 412, so as to reduce the impact of the part of the socket 412 protruding from the top surface of the socket 391 on the support of the dummy battery cell 302 for the first jumper bar 51, and also facilitate the cable tie body 411 to fix the first jumper bar 51.

[0221] Through the above technical solution, a first groove 392 is provided on the dummy battery cell 302 so that when the socket 412 is inserted into the socket 391, the part of the socket 412 protruding from the socket 391 can be positioned in the first groove 392, so that the top surface of the dummy battery cell 302 along the third direction G can have a larger area to contact the first crossbar 51, so as to stably support the first crossbar 51.

[0222] In some embodiments, please refer to Figure 5 , Figures 11 to 17 The dummy battery cell 302 is provided with a second groove 393, and a first groove 392 is provided at the bottom of the second groove 393. The depth of the first groove 392 is greater than the depth of the second groove 393. Along the second direction N, the size of the first groove 392 is smaller than the size of the second groove 393.

[0223] The second groove 393 refers to the groove structure set on the top of the dummy battery cell 302.

[0224] The first groove 392 being located at the bottom of the second groove 393 means that the first groove 392 is located on the bottom surface at the depth of the second groove 393. The depth of the second groove 393 is parallel to the third direction G.

[0225] The depth dimension of the first groove 392 being greater than the depth dimension of the second groove 393 means that the depth of the first groove 392 along the third direction G is greater than the dimension of the second groove 393 along the third direction G. The dimension of the first groove 392 being smaller than the dimension of the second groove 393 along the second direction N means that the dimension of the first groove 392 in the second direction N is smaller than the dimension of the second groove 393 in the second direction N. This structure allows the opening area of ​​the second groove 393 to be larger than the opening area of ​​the first groove 392, and forms a stepped groove structure on the top of the dummy battery cell 302 on multiple sides of both the second groove 393 and the first groove 392, which can improve the structural strength of the top of the dummy battery cell 302. Setting the depth dimension of the second groove 393 to be smaller allows for higher strength of the stepped structure formed at the second groove 393 in the dummy battery cell 302, making it easier to set the first groove 392 at the bottom of the second groove 393. Additionally, a first groove 392 is provided at the bottom of the second groove 393. When the socket 412 of the cable tie 410 is inserted into the socket 391, the perforated seat of the cable tie 410 can be completely placed in the space formed by the first groove 392 and the second groove 393. Furthermore, the portion of the cable tie body 411 located on the side of the first crossbar 51 along the third direction G closer to the dummy battery cell 302 can be located in the space formed by the first groove 392 and the second groove 393. This allows the first crossbar 51 to be supported on the top surface of the dummy battery cell 302, facilitating the stable support of the dummy battery cell 302 on the first crossbar 51 and fixing the cable tie body 411 to the first crossbar 51.

[0226] Through the above technical solution, a second groove 393 is provided on the dummy battery cell 302, and the first groove 392 is provided at the bottom of the second groove 393, so that the depth of the first groove 392 is greater than the depth of the second groove 393, and the size of the first groove 392 along the second direction N is smaller than the size of the second groove 393. A stepped structure can be formed on multiple sides of the first groove 392 on the dummy battery cell 302 to improve the structural strength of the top surface of the dummy battery cell 302.

[0227] In some embodiments, please refer to Figure 5 , Figures 11 to 17 Along the second direction N, one side of the second groove 393 is flush with one side of the first groove 392 to facilitate the positioning of the second groove 393.

[0228] In some embodiments, along the second direction N, the two sides of the second groove 393 may be spaced apart from the corresponding sides of the first groove 392, thereby forming a stepped structure on all four sides of the first groove 392, further enhancing the rigidity and deformation resistance of the top of the dummy battery cell 302.

[0229] In some embodiments, please refer to Figure 5 , Figures 11 to 17 The top surface of the dummy battery cell 302 protrudes along the second direction N towards the side facing the real battery cell 301 and is provided with a strip-shaped baffle 394.

[0230] The top surface of the dummy battery cell 302 refers to the top surface of the dummy battery cell 302 along the third direction G.

[0231] Strip baffle 394 refers to a strip-shaped component whose length dimension is greater than its width dimension and whose length dimension is greater than its thickness dimension.

[0232] Since the outer shell 32 of the genuine battery cell 301 includes a housing 321 and an end cap 322, and the periphery of the end cap 322 is generally welded to the opening side of the housing 321, stress and thermal stress concentration will occur at the connection between the housing 321 and the end cap. Furthermore, under pressure at the connection between the housing 321 and the end cap 322, the connection is prone to cracking. However, by providing a strip-shaped baffle 394 on the top surface of the dummy battery cell 302 along the second direction N and close to the genuine battery cell 301, the side of the dummy battery cell 302 closest to the corresponding genuine battery cell 301 can be locally raised. This prevents the dummy battery cell 302 from directly compressing the application concentration area at the connection between the housing 321 and the end cap 322, thereby reducing the risk of cracking of the housing 321 and the end cap 322.

[0233] By using the above technical solution, a strip baffle 394 is provided on the side of the dummy battery cell 302 facing the real battery cell 301, which can make the strip baffle 394 protrude from the top surface of the real battery cell 301, thereby reducing the risk of cracking at the connection between the end cap 322 and the housing 321 of the real battery cell 301.

[0234] In some embodiments, the top surface of the dummy battery cell 302 may not be provided with a strip baffle 394, even if the top surface of the dummy battery cell 302 is flush with the top surface of the real battery cell 301, so that the dummy battery cell 302 can replace the real battery cell 301 to occupy the empty space in the housing 20.

[0235] In some embodiments, please refer to Figure 5 , Figure 7 , Figure 10 , Figure 12 , Figure 15 and Figure 17The top surface of the dummy battery cell 302 has a protruding first dummy electrode terminal 3321. The first dummy electrode terminal 3321 is located on the side of the first bridging bar 51 away from the real battery cell 301, and is used to limit the displacement of the first bridging bar 51 away from the real battery cell 301.

[0236] The dummy electrode terminal 332 refers to the structural part provided on the top surface of the dummy battery cell 302 that is similar in shape to the real electrode terminal 331 on the real battery cell 301.

[0237] The first dummy electrode terminal 3321 refers to the dummy electrode terminal 332 provided on the top surface of the dummy battery cell 302.

[0238] The first dummy electrode terminal 3321 is located on the side of the first bridging block 51 away from the real battery cell 301, meaning that the first dummy electrode terminal 3321 is located on the side of the first bridging block 51 away from the real battery cell 301 along the second direction N.

[0239] The first dummy electrode terminal 3321 is used to limit the displacement of the first bridging block 51 away from the real battery cell 301. This means that the real battery cell 301 will expand and deform during the charging and discharging process. Correspondingly, it will also drive the first bridging block 51 connected to the real electrode terminal 331 on the real battery cell 301 to move along the second direction N, that is, move towards the first dummy electrode terminal 3321, and be held by the first dummy electrode terminal 3321, thereby limiting the movement of the first bridging block 51 along the second direction N.

[0240] Through the above technical solution, a first dummy electrode terminal 3321 is provided on the top surface of the dummy battery cell 302, so that the first dummy electrode terminal 3321 is located on the side of the first bridging block 51 away from the real battery cell 301. Thus, when the real battery cell 301 expands and deforms, the first dummy electrode terminal 3321 can abut against the first bridging block 51, thereby limiting the expansion and deformation of the real battery cell 301.

[0241] In some embodiments, please refer to Figure 20 The top surface of the dummy battery cell 302 has a protruding second dummy electrode terminal 3322, which supports the first bridging row 51.

[0242] The second dummy electrode terminal 3322 refers to the dummy electrode terminal 332 set on the top surface of the dummy battery cell 302.

[0243] With the above technical solution, a second dummy electrode terminal 3322 is provided on the dummy battery cell 302. The first bridging bar 51 passes above the second dummy electrode terminal 3322, and the second dummy electrode terminal 3322 can support the first bridging bar 51 so as to fix the first bridging bar 51.

[0244] In some embodiments, please refer toFigure 5 , Figure 7 , Figures 11 to 17 The fixing structure 41 is located in the middle of the dummy battery cell 302 along the first direction M.

[0245] The middle part of the dummy battery cell 302 along the first direction M refers to the middle part along the length of the dummy battery cell 302, which is also the part of the dummy battery cell 302 along the first direction M excluding the two ends.

[0246] By using the above technical solution, the fixing structure 41 is located in the middle of the dummy battery cell 302 in the first direction M, which makes it easy to position the fixing structure 41 and facilitates the installation of the fixing structure 41 on the dummy battery cell 302.

[0247] In some embodiments, the fixing structure 41 may also be provided at one end of the dummy battery cell 302 along the first direction M. In some embodiments, the fixing structure 41 may be provided at both ends of the dummy battery cell 302 along the first direction M. In some embodiments, the fixing structure 41 may be provided only at one end of the dummy battery cell 302 along the first direction M.

[0248] In some embodiments, please refer to Figure 5 , Figure 7 , Figures 11 to 17 The dummy battery cell 302 includes a housing 37 with an inner cavity 370, and a fixing structure 41 is mounted on the housing 37.

[0249] The outer shell 37 refers to the shell structure that forms the outer contour shape of the dummy battery cell 302.

[0250] The inner cavity 370 refers to the space formed inside the outer casing 37. The outer casing 37 is used to form the outline of the dummy battery cell 302 to occupy the empty space in the housing 20, while the inner cavity 370 is formed in the outer casing 37, which can reduce the overall weight of the dummy battery cell 302, thereby reducing the overall weight of the battery device 200.

[0251] The mounting of the fixing structure 41 on the housing 37 means that the fixing structure 41 can be fixedly connected to the housing 37 by means of welding, screwing or snapping, so as to securely integrate the fixing structure 41 onto the dummy battery cell 302.

[0252] As an example, when the fixing structure 41 includes a cable tie 410, and the cable tie 410 includes a socket 412 and a cable tie body 411, the housing 37 is provided with a socket 391. The socket 391 connects the inner cavity 370 with the external space of the dummy battery cell 302. The socket 412 is inserted into the socket 391 and extends into the inner cavity 370 to fix the socket 412 to the housing 37, thereby fixing the cable tie body 411 to the housing 37. In some embodiments, a buckle may be provided on the socket 412. When the socket 412 is inserted into the socket 391, the buckle may extend into the inner cavity 370 and abut against one end of the socket 391 in the inner cavity 370. The buckle also engages with the portion of the socket 412 inserted outside the housing 37 to clamp the housing 37, thereby firmly fixing the socket 412 to the housing 37, thereby firmly installing the cable tie body 411 onto the housing 37.

[0253] By using the above technical solution, an inner cavity 370 is provided in the dummy battery cell 302, which can reduce the weight of the dummy battery cell 302 and reduce the cost.

[0254] In some embodiments, the dummy battery cell 302 can also be made into a solid structure to improve the structural strength of the dummy battery cell 302.

[0255] In some embodiments, please refer to Figure 5 , Figure 7 , Figures 11 to 17 The dummy battery cell 302 includes a housing 37 with an inner cavity 370, the inner cavity 370 being open along the second direction N away from the real battery cell 301.

[0256] The inner cavity 370 being open on the side away from the real battery cell 301 along the second direction N means that in a battery cell assembly 300, the dummy battery cell 302 at the end has no closed structure on the side away from the real battery cell 301, forming an open cavity so that the inner cavity 370 can be formed inside it when the dummy battery cell 302 is manufactured.

[0257] By using the above technical solution, the inner cavity 370 of the dummy battery cell 302 is set in an open shape on the side facing away from the real battery cell 301, which can facilitate the processing and manufacturing of the dummy battery cell 302.

[0258] In some embodiments, other sides of the inner cavity 370 of the dummy battery cell 302 are provided to be open. As an example, the bottom of the inner cavity 370 along the third direction G can be provided to be open. As an example, the side of the inner cavity 370 along the first direction M can be provided to be open.

[0259] In some embodiments, please refer to Figure 3 , Figures 15 to 17The inner cavity 370 is provided with a rib 38, which protrudes from the outer shell 37 along the second direction N towards the open side of the inner cavity 370 near the true battery cell 301.

[0260] Ribs 38 refer to the protruding strip-shaped structures on the inner surface of the inner cavity 370, used to enhance the structural rigidity and deformation resistance of the outer shell 37, thereby improving the structural strength of the outer shell 37 and thus the overall structural strength of the dummy battery cell 302. The cross-section of ribs 38 can be rectangular, trapezoidal, or arc-shaped, and their number, distribution density, and protrusion height are all set according to the stress on the outer shell 37.

[0261] The rib 38 is designed to protrude from the outer shell 37 along the second direction N towards the open side of the inner cavity 370, meaning that the rib 38 protrudes from the side wall of the inner cavity 370 away from its open side towards its open side. This structure facilitates the processing and manufacturing of the rib 38.

[0262] By using the above technical solution, the ribs 38 are provided in the inner cavity 370, which can improve the structural strength of the dummy battery cell 302; the ribs 38 extend from the bottom of the inner cavity 370 toward the opening, so as to facilitate the processing and manufacturing of the ribs 38.

[0263] In some embodiments, please refer to Figure 3 , Figures 15 to 17 The reinforcing bars 38 are arranged in a grid pattern.

[0264] The ribs 38 are arranged in a grid pattern, which means that multiple ribs 38 in the inner cavity 370 are arranged in a grid pattern so that the ribs 38 can support the outer shell 37 well and improve the structural strength of the dummy battery cell 302.

[0265] The above technical solution facilitates the layout and setting of the reinforcing bars 38, and also facilitates the processing and manufacturing of the reinforcing bars 38.

[0266] In some embodiments, please refer to Figure 3 , Figures 15 to 17 The rib 38 includes a plurality of first ribs 381 arranged at intervals along a first direction M, and each first rib 381 extends along a third direction G.

[0267] The first rib 381 refers to a rib 38 installed in the inner cavity 370.

[0268] The extension of each first rib 381 along the third direction G means that the length of each first rib 381 is parallel to the third direction G, that is, the length of each first rib 381 is parallel to the height direction Z of the box 20, or the length of each first rib 381 is approximately parallel to the third direction G. Approximately parallel means that the two directions are roughly parallel, allowing for a certain error, such as an angle of less than 5 degrees between the two directions.

[0269] The multiple first ribs 381 arranged at intervals along the first direction M refer to the multiple first ribs 381 in the inner cavity 370: two adjacent first ribs 381 are arranged at intervals along the first direction M.

[0270] Multiple first ribs 381 refer to two or more first ribs 381.

[0271] By using the above technical solution, multiple first ribs 381 extending along the third direction G are provided in the inner cavity 370, which can enhance the structural strength of the dummy battery cell 302 along the third direction G.

[0272] In some embodiments, please refer to Figure 3 , Figures 15 to 17 The rib 38 includes a plurality of second ribs 382 arranged at intervals along a third direction G, and each second rib 382 extends along a first direction M.

[0273] The second rib 382 refers to a rib 38 installed in the inner cavity 370.

[0274] The extension of each second rib 382 along the first direction M means that the length of each second rib 382 is parallel to the first direction M, or the length of each second rib 382 is approximately parallel to the first direction M.

[0275] The multiple second ribs 382 arranged at intervals along the third direction G refer to the multiple second ribs 382 in the inner cavity 370: two adjacent second ribs 382 are arranged at intervals along the third direction G, that is, two adjacent second ribs 382 are arranged at intervals at the height of the box 20.

[0276] Multiple second ribs 382 refer to two or more second ribs 382.

[0277] By using the above technical solution, multiple second ribs 382 extending along the first direction M are provided in the inner cavity 370, which can enhance the structural strength of the dummy battery cell 302 along the first direction M.

[0278] In some embodiments, please refer to Figure 3 , Figures 15 to 17 The sidewall of the outer casing 37 facing the actual battery cell 301 is a closed flat plate.

[0279] A closed flat plate refers to a continuous flat plate structure without any openings.

[0280] The sidewall of the outer casing 37 facing the true battery cell 301 refers to the portion of the sidewall of the outer casing 37 that is closer to the true battery cell 301.

[0281] As an example, the sidewall of the outer casing 37 near the genuine battery cell 301 along the second direction N is a closed flat plate, which facilitates the dummy battery cell 302 to hold the genuine battery cell 301, thereby limiting the expansion and deformation of the genuine battery cell 301. At the same time, the large contact area between the flat sidewall and the genuine battery cell 301 results in more uniform force distribution when holding the genuine battery cell 301, effectively dispersing expansion stress and reducing the risk of cracking of the outer casing 32 of the genuine battery cell 301.

[0282] As an example, the sidewalls of the outer shell 37 along the first direction M can also be made into closed flat plates to improve the structural rigidity of the outer shell 37 along the first direction M.

[0283] The above technical solution facilitates the dummy battery cell 302 to effectively support the real battery cell 301, thereby limiting the expansion and deformation of the real battery cell 301.

[0284] In some embodiments, please refer to Figure 3 and Figure 10 Along the second direction N, a buffer pad 42 is provided between the dummy battery cell 302 and the real battery cell 301.

[0285] Cushion 42 refers to a pad structure that can undergo elastic deformation to provide cushioning. Cushion 42 can be made of elastic rubber, silicone, or polymer foam material.

[0286] By using the above technical solution, a buffer pad 42 is set between the dummy battery cell 302 and the real battery cell 301, which can play a good buffering role and facilitate the packing of the dummy battery cell 302 and the real battery cell 301.

[0287] In some embodiments, along the second direction N, the dummy battery cell 302 may also be in direct contact with the real battery cell 301.

[0288] In some embodiments, please refer to Figure 3 , Figure 11 and Figure 16 Along the second direction N, the periphery of the side of the dummy battery cell 302 facing the real battery cell 301 is provided with an adhesive layer 44, which is bonded to the real battery cell 301.

[0289] Adhesive layer 44 refers to a structural layer made of an adhesive material with bonding properties. As an example, adhesive layer 44 can be made using a cured adhesive material. As an example, adhesive layer 44 can also be made using double-sided tape.

[0290] The side of the dummy battery cell 302 facing the real battery cell 301 refers to the side of the dummy battery cell 302 along the second direction N, facing the real battery cell 301.

[0291] Along the second direction N, the periphery of the side of the dummy battery cell 302 facing the real battery cell 301 is provided with an adhesive layer 44, which means that the four sides of this side are provided with an adhesive layer 44, so that the adhesive layer 44 on this side forms a frame-like structure as a whole.

[0292] An adhesive layer 44 is provided on the side of the dummy battery cell 302 along the second direction N to bond and connect it with the real battery cell 301, so as to achieve reliable fixation between the dummy battery cell 302 and the real battery cell 301, and also facilitate the grouping of the dummy battery cell 302 and the real battery cell 301.

[0293] An adhesive layer 44 is provided around the side of the dummy battery cell 302 along the second direction N and facing the real battery cell 301. This layer can be bonded to the periphery of the adjacent side of the real battery cell 301 to more stably bond the real battery cell 301 and the dummy battery cell 302.

[0294] Through the above technical solution, an adhesive layer 44 is provided on the dummy battery cell 302 so as to bond and fix it to the real battery cell 301. The adhesive layer 44 is set around the corresponding surface of the dummy battery cell 302, which can more stably bond and connect it to the real battery cell 301.

[0295] In some embodiments, please refer to Figure 3 , Figure 11 and Figure 16 The adhesive layer 44 is divided into four segments, and the four segments of adhesive layer 44 are respectively set on the four sides of the dummy battery cell 302, and the four segments of adhesive layer 44 are connected end to end to form a frame.

[0296] The adhesive layer 44 is divided into four segments, which means that the adhesive layer 44 connecting the dummy battery cell 302 and the real battery cell 301 consists of four independent segments. The four segments of adhesive layer 44 are respectively set on the four sides of the corresponding side of the dummy battery cell 302, so that adhesive layer 44 can be set on the four sides of the corresponding side of the dummy battery cell 302.

[0297] The four adhesive layers 44 connected end to end to form a frame means that after the corresponding side of the dummy battery cell 302, the adjacent ends of any two adjacent sides of the adhesive layers 44 are connected to each other, so that the four adhesive layers 44 are connected to form a closed frame structure.

[0298] By using the above technical solution, the adhesive layer 44 is divided into four segments, which are respectively set on the four sides of the corresponding surface of the dummy battery cell 302, which facilitates the layout and setting of the adhesive layer 44.

[0299] In some embodiments, along the first direction M, the size of the dummy battery cell 302 is greater than or equal to the size of two real battery cells 301.

[0300] Along the first direction M, the size of the dummy battery cell 302 being greater than or equal to the size of two real battery cells 301 means that the size of the dummy battery cell 302 in the first direction M can be equal to or greater than the size of two real battery cells 301 in the first direction M, that is, the length of the dummy battery cell 302 being greater than or equal to the length of two real battery cells 301.

[0301] As an example, when the size of the dummy battery cell 302 in the first direction M is equal to the size of the two real battery cells 301 in the first direction M, the real battery cells 301 of two adjacent battery cell assemblies 300 can be arranged on the same side of the dummy battery cell 302. Accordingly, in the two battery cell assemblies 300 corresponding to the dummy battery cell 302, the two real battery cells 301 close to the dummy battery cell 302 are connected by a first crossbar 51, and part of the first crossbar 51 is located on the top surface of the dummy battery cell 302 along the third direction G, thereby stably supporting the first crossbar 51 through the dummy battery cell 302. In addition, the number of dummy battery cells 302 can be reduced.

[0302] As an example, when the size of the dummy battery cell 302 in the first direction M is larger than the size of the two real battery cells 301 in the first direction M, the projection of the dummy battery cell 302 in the second direction N can better cover the corresponding two real battery cells 301, so as to support the real battery cells 301 and thus more effectively suppress the expansion deformation of the real battery cells 301 during the charging and discharging process.

[0303] By using the above technical solution, setting the length of the dummy battery cell 302 to be greater than or equal to the length of two real battery cells 301 can facilitate the setting of the dummy battery cell 302 at the ends of two adjacent battery cell assemblies 300.

[0304] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 7 and Figure 12 Along the first direction M, a plurality of fixed structures 41 are connected to the first cross-connection row 51. Two adjacent fixed structures 41 are spaced apart, and two adjacent fixed structures 41 are respectively set on two adjacent dummy battery cells 302.

[0305] "Multiple" refers to two or more. "Multiple fixed structures 41 connected to the first crossover row 51" means that there are two or more fixed structures 41 connected to the first crossover row 51. "Multiple fixed structures 41 connected to the first crossover row 51 along the first direction M" means that the multiple fixed structures 41 connected to the first crossover row 51 are arranged along the first direction M.

[0306] The interval between two adjacent fixed structures 41 means that there is a gap between two adjacent fixed structures 41 along the first direction M.

[0307] The phrase "two adjacent fixed structures 41 are respectively set on two adjacent dummy battery cells 302" means that among the two adjacent fixed structures 41 along the first direction M and the two adjacent dummy battery cells 302 along the first direction M, one fixed structure 41 is installed on one dummy battery cell 302 and the other fixed structure 41 is installed on the other dummy battery cell 302.

[0308] By using the above technical solution, multiple fixing structures 41 are used to fix the first crossover row 51, which can stably fix the first crossover row 51; and two adjacent fixing structures 41 are respectively set on two dummy battery cells 302, which can facilitate the layout of the fixing structures 41 on the dummy battery cells 302, and can make the structural strength of the dummy battery cells 302 higher.

[0309] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 7 and Figure 12 The distance between two adjacent fixed structures 41 ranges from 100mm to 300mm.

[0310] The distance between two adjacent fixed structures 41 refers to the distance between the two adjacent fixed structures 41 along the first direction M.

[0311] The distance between two adjacent fixed structures 41 is 100mm-300mm, which means that the distance between two adjacent fixed structures 41 along the first direction M is 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, etc.

[0312] By using the above technical solution, the distance between two adjacent fixed structures 41 is set to 100mm-300mm, which can stably fix the first cross-connection row 51.

[0313] In some embodiments, the distance between two adjacent fixed structures 41 ranges from 150mm to 200mm.

[0314] The distance between two adjacent fixed structures 41 is 150mm-200mm, which means that the distance between two adjacent fixed structures 41 along the first direction M is 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, etc.

[0315] The above technical solution can more stably fix the first cross-connection row 51.

[0316] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 7 and Figure 12 Along the second direction N, the size of the dummy battery cell 302 is adapted so that the size of the battery cell assembly 300 in which the dummy battery cell 302 is located is equal to the size of the adjacent battery cell assembly 300.

[0317] The fact that the size of the battery cell assembly 300 containing the dummy battery cell 302 is equal to the size of the adjacent battery cell assembly 300 means that the total size of the battery cell assembly 300 containing the dummy battery cell 302 along the second direction N is equal to the total size of the adjacent battery cell assembly 300 along the second direction N, so that the battery cell assembly 300 can be installed in the housing 20.

[0318] In the second direction N, the dimension adaptation of the dummy battery cell 302 such that the dimension of the battery cell assembly 300 where the dummy battery cell 302 is located is equal to the dimension of the adjacent battery cell assembly 300 means that in the second direction N, the dimension of the dummy battery cell 302 plus the sum of the dimensions of the remaining parts is equal to the dimension of the adjacent battery cell assembly 300 in the second direction N. As an example, in the battery cell assembly 300 where the dummy battery cell 302 is located: the dimension of the dummy battery cell 302 in the second direction N is L1, and the sum of the dimensions of the remaining parts of this battery cell assembly 300 in the second direction N is L2; the dimension of the adjacent battery cell assembly 300 in the second direction N is L, then L = L1 + L2. As another example, in the battery cell assembly 300 where the dummy battery cell 302 is located: the length of the group formed by arranging multiple real battery cells 301 in the second direction N is L3, and the dimension of the adjacent battery cell assembly 300 in the second direction N is L, then the dimension of this dummy battery cell 302 in the second direction N is L4, and L = L3 + L4. As an example, in the battery cell assembly 300 formed entirely by real battery cells 301, the dimension of the battery cell assembly 300 in the second direction N is L5, which includes T1 real battery cells 301 and T2 spacers located between the real battery cells 301. The dimension of the real battery cell 301 in the second direction N is L6, and the dimension of the spacer in the second direction N is L7, L5 = T1 * L6 + T2 * L7. In the battery cell assembly 300 with a dummy battery cell 302, it includes T3 real battery cells 301 and T4 spacers located between the real battery cells 301, T3 < T1, and the dimension of the dummy battery cell 302 in the second direction N is L8; T4 ≤ T2, L8 = (T2 - T4) * L7 + (T1 - T3) * L6.

[0319] Through the above technical solution, it is convenient to adjust the overall dimension of the battery cell assembly 300 through the dummy battery cell 302, so that the dimensions of two adjacent battery cell assemblies 300 are equal, facilitating the assembly of the battery cell assemblies 300 and their stable installation in the box body 20.

[0320] In some embodiments, in the second direction N or the third direction G, the dimension of the dummy battery cell 302 is equal to the dimension of one real battery cell 301.

[0321] In the second direction N or the third direction G, the dimension of the dummy battery cell 302 being equal to the dimension of one real battery cell 301 means that the dimension of the dummy battery cell 302 in the second direction N is equal to the dimension of one real battery cell 301 in the second direction N; or, the dimension of the dummy battery cell 302 in the third direction G is equal to the dimension of one real battery cell 301 in the third direction G.

[0322] The fact that the dimension of the dummy battery cell 302 along the second direction N is equal to the dimension of the real battery cell 301 along the second direction N means that the width of the dummy battery cell 302 is equal to the width of the real battery cell 301, which makes it easy to determine the number of dummy battery cells 302 in the battery cell assembly 300.

[0323] The fact that the dimension of the dummy battery cell 302 along the third direction G is equal to the dimension of the real battery cell 301 along the third direction G means that the height of the dummy battery cell 302 is equal to the height of the real battery cell 301, so as to determine the overall height of the battery cell assembly 300 in the housing 20.

[0324] The above technical solution allows for easy adjustment of the number of dummy battery cells 302 based on the housing space 201 and the set capacity of the housing 20, thereby adjusting the capacity of the battery device 200.

[0325] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 7 and Figure 12 Along the second direction N, the size of the dummy battery cell 302 is greater than or equal to the size of two real battery cells 301.

[0326] Along the second direction N, the size of the dummy battery cell 302 being greater than or equal to the size of two real battery cells 301 means that the size of the dummy battery cell 302 along the second direction N is greater than or equal to the size of two real battery cells 301 along the second direction N, that is, the width of the dummy battery cell 302 is greater than or equal to twice the width of the real battery cell 301.

[0327] By using the above technical solution, setting the width of the dummy battery cell 302 to be greater than or equal to the width of two real battery cells 301 can reduce the number of dummy battery cells 302, thereby reducing costs. Furthermore, it allows for a larger width on the dummy battery cell 302 to accommodate the mounting structure 41, facilitating the installation of the mounting structure 41.

[0328] In some embodiments, please refer to Figure 5 , Figure 7 and Figure 18 The first bridging bar 51 includes a conductive body 511, a first insulating layer 512 is provided on the conductive body 511, and a second insulating layer 513 is wrapped on the conductive body 511 at the position corresponding to the fixed structure 41.

[0329] The conductive body 511 refers to the main body 311 structure in the first bridging bar 51 made of conductive material. The conductive body 511 can be made of conductive materials such as copper and aluminum.

[0330] The first insulating layer 512 refers to a structural layer made of insulating material. The insulating material can be plastic, insulating varnish, insulating tape, insulating cloth, etc.

[0331] By providing a first insulating layer 512 on the conductive body 511, the conductive body 511 can be insulated and protected, reducing the risk of short circuit connection between the conductive body 511 and other components.

[0332] The second insulating layer 513 refers to a structural layer made of insulating material. The insulating material can be plastic, insulating varnish, insulating tape, insulating cloth, etc.

[0333] The position on the conductive body 511 corresponding to the fixed structure 41 refers to the location on the conductive body 511 that is connected to the fixed structure 41. By providing a second insulating layer 513 at the location on the conductive body 511 where it connects to the fixed structure 41, the cooperation of the first insulating layer 512 and the second insulating layer 513 can increase the thickness and strength of the insulating structure at the location on the conductive body 511 where it connects to the fixed structure 41, thereby reducing the risk of the fixed structure 41 wearing down the insulating structure on the conductive body 511.

[0334] Through the above technical solution, the first insulating layer 512 is provided on the conductive body 511 of the first bridging bar 51, which can play a good role in insulation protection. The second insulating layer 513 is provided, and the fixing structure 41 is connected to the second insulating layer 513, which can better protect the conductive body 511 and provide better insulation protection.

[0335] In some embodiments, when the dummy battery cell 302 is made of insulating material, the first bridging bar 51 may also consist only of the conductive body 511.

[0336] In some embodiments, please refer to Figure 5 , Figure 7 and Figure 18 The second insulating layer 513 is disposed between the first insulating layer 512 and the fixing structure 41.

[0337] The second insulating layer 513 is disposed between the first insulating layer 512 and the fixing structure 41, meaning that the second insulating layer 513 is disposed on the first insulating layer 512. In this way, when the fixing structure 41 is connected to the first bridging bar 51, the fixing structure 41 is directly connected to the second insulating layer 513, and the first insulating layer 512 is protected by the second insulating layer 513.

[0338] With the above technical solution, the second insulating layer 513 is disposed between the fixed structure 41 and the first insulating layer 512, which can play a good protective role and reduce the risk of the fixed structure 41 wearing down the first insulating layer 512.

[0339] In some embodiments, the second insulating layer 513 may be disposed between the first insulating layer 512 and the conductive body 511.

[0340] In some embodiments, please refer to Figure 5 , Figure 7 and Figure 18 A third insulating layer 514 is provided on the conductive body 511, and the third insulating layer 514 is disposed between the first insulating layer 512 and the conductive body 511.

[0341] The third insulating layer 514 refers to a structural layer made of insulating materials. These insulating materials can be plastics, insulating varnish, insulating tape, insulating cloth, etc.

[0342] The third insulating layer 514 being disposed between the first insulating layer 512 and the conductive body 511 means that the first insulating layer 512 is disposed on the third insulating layer 514.

[0343] By using the above technical solution, a third insulating layer 514 is provided between the conductive body 511 and the first insulating layer 512, which can improve the insulation performance.

[0344] Through the above technical solution, a third insulating layer 514 can be provided on the conductive body 511, a first insulating layer 512 is provided on the third insulating layer 514, and a second insulating layer 513 is provided on the first insulating layer 512 at the position where it is connected to the fixing structure 41.

[0345] In some embodiments, only the first insulating layer 512 and the second insulating layer 513 may be provided on the conductive body 511.

[0346] In some embodiments, when multiple fixing structures 41 are connected to the first bridging bar 51, there will be multiple positions on the conductive body 511 for connecting the fixing structures 41, and a second insulating layer 513 will be provided at the corresponding positions. That is, multiple second insulating layers 513 will be provided on the conductive body 511.

[0347] In some embodiments, please refer to Figure 5 , Figure 7 and Figure 18The conductive body 511 includes a first part 5111 and second parts 5112 located at both ends of the first part 5111. The second parts 5112 extend protruding from one side of the first part 5111. The first part 5111 extends along a first direction M, and the second part 5112 extends along a second direction N. The second part 5112 is connected to the true electrode terminal 331 of the corresponding true battery cell 301. Thus, the two second parts 5112 are connected to the true electrode terminals 331 of the corresponding two true battery cells 301, so that the two first bridging blocks 51 electrically connect the corresponding two true battery cells 301. The first part 5111 passes through the top of the dummy battery cell 302 along a third direction G, so that the dummy battery cell 302 supports the first part 5111, and the fixing structure 41 is fixedly connected to the first part 5111.

[0348] In some embodiments, when the conductive body 511 includes a first insulating layer 512, the first insulating layer 512 wraps around the first part 5111 to provide good insulation protection for the first part 5111.

[0349] In some embodiments, the first insulating layer 512 may wrap around a portion of the second part 5112 near the first part 5111 to provide better insulation protection, and the portion of the second part 5112 extending out of the first insulating layer 512 may be connected to the corresponding true electrode terminal 331.

[0350] In some embodiments, when the conductive body 511 includes a second insulating layer 513, the second insulating layer 513 is disposed on the first part 5111 so that the second insulating layer 513 is disposed at the position corresponding to the fixing structure 41.

[0351] In some embodiments, when the conductive body 511 includes a third insulating layer 514, the third insulating layer 514 wraps around the first part 5111 to provide good insulation protection for the first part 5111.

[0352] In some embodiments, the third insulating layer 514 may wrap around a portion of the second part 5112 near the first part 5111 to provide better insulation protection, and the portion of the second part 5112 extending out of the third insulating layer 514 may be connected to the corresponding true electrode terminal 331.

[0353] In some embodiments, please refer to Figure 5 and Figure 15 The fake battery cell 302 is made of plastic.

[0354] Plastic parts refer to structural components that are primarily made of plastic materials. "Primarily made of plastic materials" means that the plastic volume percentage is greater than 50%, meaning a plastic part is a structural component made of materials with a plastic volume percentage greater than 50%. The plastic volume percentage in a plastic part provides good insulation, while the remaining materials can be metals such as aluminum or steel, or fiber materials, to enhance the structural strength of the plastic part. As an example, a plastic part can also be made entirely of plastic materials.

[0355] As an example, plastic parts can include injection molded parts, extruded parts, compression molded parts, etc.

[0356] Through the above technical solution, the fake battery cell 302 uses plastic parts, which is low in cost and easy to process and manufacture.

[0357] In some embodiments, the dummy battery cell 302 may also be made of materials such as aluminum or ceramic.

[0358] In some embodiments, please refer to Figure 3 , Figures 5 to 8 , Figure 13 , Figure 14 , Figure 19 and Figure 20 The battery device 200 includes a pressure strip 60, which connects the shoulders of two adjacent battery cell assemblies 300. The pressure strip 60 extends along the second direction N, and the shoulder of the battery cell assembly 300 where the dummy battery cell 302 is located is connected to the shoulder of the adjacent battery cell assembly 300 through the pressure strip 60.

[0359] The pressure strip 60 refers to a strip-shaped connector that connects two adjacent battery cell modules 300 to enhance structural stability. The pressure strip 60 can be made of plastic, polyurethane-based materials, metal, or composite materials. Using polyurethane-based materials for the pressure strip 60 allows for direct extrusion molding, making it easy to process and manufacture at a low cost.

[0360] The shoulder of a battery cell 30 refers to the portion of the top surface of the battery cell 30 at both ends along the first direction M. The top surface of the battery cell 30 refers to the top surface of the battery cell 30 along the third direction G. In a battery cell 30, when the top surface of the battery cell 30 is provided with electrode terminals 33, the portion of the top surface of the battery cell 30 on the side opposite to the middle of the battery cell 30 along the first direction M is the shoulder of the battery cell 30. When the top surface of the battery cell 30 is provided with two electrode terminals 33 spaced apart along the first direction M, the portion of the top surface of the battery cell 30 on the side opposite to the other electrode terminal 33 is the shoulder of the battery cell 30. That is, the battery cell 30 has two shoulders, located at both ends of the battery cell 30 along the first direction M. The battery cell 30 can be a real battery cell 301 or a dummy battery cell 302. The electrode terminals 33 can be real electrode terminals 331 on a real battery cell 301 or dummy electrode terminals 332 on a dummy battery cell 302.

[0361] When multiple battery cells 30 are arranged along the second direction N to form a battery cell assembly 300, the shoulders of the multiple battery cells 30 along one side of the first direction M are combined to form a shoulder of the battery cell 30 along the first direction M, and the shoulders of the multiple battery cells 30 along the other side of the first direction M are combined to form a shoulder of the battery cell 30 along the other side of the first direction M.

[0362] The pressure strip 60 connects the shoulders of two adjacent battery cell assemblies 300, meaning that the pressure strip 60 is connected to the shoulder of one battery cell assembly 300 on one side along the first direction M, and the pressure strip 60 is connected to the shoulder of another battery cell assembly 300 on the other side along the first direction M. The two battery cell assemblies 300 are adjacent along the first direction M, and the shoulders of the two battery cell assemblies 300 connected by the pressure strip 60 are also adjacent along the first direction M, so as to improve the connection strength between the two battery cell assemblies 300.

[0363] The pressure strip 60 extends along the second direction N, meaning that the length of the pressure strip 60 is parallel to the second direction N, so that the pressure strip 60 connects the shoulders of two adjacent battery cell assemblies 300.

[0364] The connection between the shoulder of the battery cell assembly 300 containing the dummy battery cell 302 and the shoulder of the adjacent battery cell assembly 300 via the pressure strip 60 means that the battery cell assembly 300 containing the dummy battery cell 302 and the adjacent battery cell assembly 300 are connected by the pressure strip 60 to improve the connection strength between the two battery cell assemblies 300.

[0365] By using the above technical solution, a pressure strip 60 is set to connect the shoulders of two adjacent battery cell assemblies 300, and the shoulder of the battery cell assembly 300 where the dummy battery cell 302 is located is connected to the shoulder of the adjacent battery cell assembly 300 using the pressure strip 60. This can improve the connection strength of the battery cell assembly 300 where the dummy battery cell 302 is located, thereby improving the overall structural strength of the battery device 200.

[0366] In some embodiments, please refer to Figures 5 to 8 A battery cell assembly 300 with a dummy battery cell 302 at one end is a first battery cell cluster 3001. The battery device 200 includes at least two adjacent first battery cell clusters 3001. The pressure strip 60 includes a first pressure strip 61, which connects the shoulders of two adjacent first battery cell clusters 3001 with a dummy battery cell 302 at one end.

[0367] The term "battery cell assembly 300 with a dummy battery cell 302 at one end" refers to a battery cell cluster 3001 that is a battery cell assembly 300 in the battery device 200, and the battery cell 30 at one end of the battery cell assembly 300 is a dummy battery cell 302.

[0368] The battery device 200 includes at least two adjacent first battery cell clusters 3001, meaning there are at least two first battery cell clusters 3001, and these two first battery cell clusters 3001 are arranged adjacent to each other along the first direction M. That is, at least two adjacent battery cell assemblies 300 have dummy battery cells 302 at one end. In other words, among the multiple battery cell assemblies 300, two or more adjacent battery cell assemblies 300 have dummy battery cells 302 at one end.

[0369] The first pressure strip 61 refers to the pressure strip 60 that connects the battery cell assembly 300 containing two adjacent dummy battery cells 302.

[0370] The first pressure strip 61 connects to the shoulder of two adjacent battery cell assemblies 300 with a dummy battery cell 302 at one end, meaning the first pressure strip 61 connects to the shoulder of the two battery cell assemblies 300, and both of these battery cell assemblies 300 have a dummy battery cell 302 at one end.

[0371] By using the above technical solution, the first pressure strip 61 is used to connect the shoulders of two battery cell assemblies 300 with a dummy battery cell 302 at one end, that is, the first pressure strip 61 is used to connect the shoulders of two adjacent first battery cell clusters 3001, which can improve the connection strength between the two battery cell assemblies 300.

[0372] In some embodiments, please refer to Figures 5 to 8The first pressure strip 61 includes a first sub-strip 611, which is offset from the dummy battery cell 302 at the end of the first battery cell cluster 3001 along the second direction N.

[0373] The first sub-strip 611 refers to a pressure strip 60 that connects two adjacent dummy battery cells 302 in the battery cell assembly 300, and is also a pressure strip 60 that connects two adjacent first battery cell clusters 3001.

[0374] Along the second direction N, the first sub-strip 611 is offset from the dummy battery cells 302 at the end of the first battery cell cluster 3001. This means that the first sub-strip 611 is offset from the dummy battery cells 302 at the end of the first battery cell cluster 3001 along the second direction N. In other words, the first sub-strip 611 does not extend along the second direction N to the dummy battery cells 302 at the ends of the corresponding two first battery cell clusters 3001. As an example, in two adjacent first battery cell clusters 3001: each first battery cell cluster 3001 has a dummy battery cell 302 at one end along the second direction N; the first sub-strip 611 extends from the other end of the two first battery cell clusters 3001 along the second direction N toward the dummy battery cells 302, and extends to the top surface of the real battery cell 301 adjacent to the dummy battery cell 302, but does not extend to the top surface of the dummy battery cell 302. Thus, the projection of the first sub-strip 611 onto the third direction G does not overlap with the dummy battery cells 302 at the ends of the first battery cell cluster 3001. The length of the first sub-strip 611 is basically the same as the size of the multiple real battery cells 301 grouped together along the second direction N in the first battery cell cluster 3001.

[0375] By using the above technical solution, the first sub-strip 611 is connected to the shoulder of two first battery cell clusters 3001 with a dummy battery cell 302 at one end, and the first sub-strip 611 is staggered from the dummy battery cell 302. This facilitates the setting of the length of the first sub-strip 611 and ensures that the first sub-strip 611 does not occupy the space on the top of the dummy battery cell 302, so that other components can be arranged above two adjacent dummy battery cells 302 along the first direction M.

[0376] In some embodiments, please refer to Figure 20 The first pressure strip 61 includes a second sub-strip 612, which connects the shoulders of two adjacent dummy battery cells 302.

[0377] The second sub-strip 612 refers to a pressure strip 60 that connects two adjacent dummy battery cells 302 in the battery cell assembly 300, and is also a pressure strip 60 that connects two adjacent first battery cell clusters 3001.

[0378] The second sub-strip 612 connects the shoulders of two adjacent dummy battery cells 302. This means that the second sub-strip 612 extends in the second direction N to the dummy battery cells 302 at one end of the corresponding two first battery cell clusters 3001, and connects to the shoulders of these two dummy battery cells 302. In other words, the second sub-strip 612 extends in the second direction N to the dummy battery cells 302 located at the ends of the corresponding two first battery cell clusters 3001. For example, in two adjacent first battery cell clusters 3001: each first battery cell cluster 3001 has a dummy battery cell 302 at one end along the second direction N; the second sub-strip 612 extends from the other end of the two first battery cell clusters 3001 along the second direction N towards the dummy battery cell 302, and extends to the top surface of the dummy battery cell 302, connecting to the adjacent shoulders of these two dummy battery cells 302.

[0379] Through the above technical solution, a second sub-strip 612 is set to connect the shoulders of two first battery cell clusters 3001 with a dummy battery cell 302 at one end, and the second sub-strip 612 is connected to the shoulders of two dummy battery cells 302 at the ends of the two first battery cell clusters 3001, so as to realize the connection strength between the two first battery cell clusters 3001, and also to realize the connection strength between the dummy battery cell 302 and the real battery cell 301 adjacent along the second direction N.

[0380] In some embodiments, please refer to Figure 3 , Figures 5 to 8 Each battery cell 30 is a genuine battery cell 301. The battery cell assembly 300 is a second battery cell cluster 3002. The battery device 200 includes at least two adjacent second battery cell clusters 3002. The pressure strip 60 includes a second pressure strip 62, which connects the shoulders of two adjacent second battery cell clusters 3002.

[0381] The term "a battery cell assembly 300 in which each battery cell 30 is a genuine battery cell 301" means that the second battery cell cluster 3002 is a battery cell assembly 300 in the battery device 200, and each battery cell 30 in the battery cell assembly 300 is a genuine battery cell 301.

[0382] At least two adjacent second battery cell clusters 3002 refer to two or more second battery cell clusters 3002 that are adjacent in number.

[0383] The battery device 200 includes at least two adjacent second battery cell clusters 3002, meaning that there are at least two second battery cell clusters 3002, and these two second battery cell clusters 3002 are arranged adjacent to each other along the first direction M. In other words, the multiple battery cells 30 of at least two adjacent battery cell assemblies 301 are all true battery cells 301, meaning that two or more battery cells 30 in two or more adjacent battery cell assemblies 300 are all true battery cells 301.

[0384] The second pressure strip 62 refers to the pressure strip 60 that connects two adjacent battery cell modules 300 formed by arranging two genuine battery cells 301.

[0385] The second pressure strip 62 connecting the shoulder of two adjacent battery cell assembly 300 refers to the second pressure strip 62 connecting the shoulder of two adjacent battery cell assembly 300 composed of two genuine battery cells 301.

[0386] By using the above technical solution, a second pressure strip 62 is set to connect the shoulders of two adjacent battery cell assemblies 300, which are both genuine battery cells 301, so that the two battery cell assemblies 300 can be stably connected and the connection strength of the two battery cell assemblies 300 can be improved.

[0387] In some embodiments, please refer to Figure 3 , Figures 5 to 8 In two adjacent battery cell assemblies 300: one end of the battery cell 30 of one battery cell assembly 300 is a dummy battery cell 302, and the other end of the battery cell 30 of the other battery cell assembly 300 is a real battery cell 301; the pressure strip 60 includes a third pressure strip 63, which connects the shoulders of the two adjacent battery cell assemblies 300, and the third pressure strip 63 connects the corresponding dummy battery cell 302 with the real battery cell 301 adjacent along the first direction M.

[0388] Two adjacent battery cell modules 300 means that two battery cell modules 300 are arranged adjacent to each other in the first direction M.

[0389] One end of a battery cell assembly 300 has a dummy battery cell 302, and the other end of a battery cell assembly 300 has a real battery cell 301. The dummy battery cell 302 and the real battery cell 301 are located at the same end of the housing 20 along the second direction N, and the dummy battery cell 302 and the real battery cell 301 are adjacent in the first direction M. That is to say, among two adjacent battery cell assemblies 300, one battery cell assembly 300 is the first battery cell cluster 3001, and the other battery cell assembly 300 is the second battery cell cluster 3002.

[0390] The third pressure strip 63 refers to the pressure strip 60 on the shoulder of two adjacent battery cell assemblies 300, and the two battery cells 30 at one end of the two adjacent battery cell assemblies 300 are respectively a dummy battery cell 302 and a real battery cell 301. That is, the third pressure strip 63 connects the shoulder of the first battery cell cluster 3001 and the shoulder of the adjacent second battery cell cluster 3002.

[0391] The third pressure strip 63 connects the corresponding dummy battery cell 302 to the real battery cell 301 adjacent along the first direction M. This means that the third pressure strip 63 connects the shoulder of the dummy battery cell 302 to the shoulder of the real battery cell 301 adjacent to the dummy battery cell 302 in the first direction M.

[0392] The third pressure strip 63 connects the shoulders of two adjacent battery cell assemblies 300. The connection between the third pressure strip 63 and the corresponding dummy battery cell 302 and the real battery cell 301 adjacent along the first direction M means that the third pressure strip 63 extends along the second direction N. The third pressure strip 63 extends from one end of the battery cell assembly 300 toward the other end and connects the adjacent shoulders of the two adjacent battery cell assemblies 300. The third pressure strip 63 extends to the shoulder of the dummy battery cell 302 at the end and to the shoulder of the real battery cell 301 adjacent to the dummy battery cell 302 in the first direction M, and connects the shoulders of each battery cell 30 in the two adjacent battery cell assemblies 300, thereby increasing the connection strength between the two battery cell assemblies 300.

[0393] Through the above technical solution, a third pressure strip 63 is set to connect the shoulders of two adjacent battery cell assemblies 300, and connects the shoulders of the dummy battery cell 302 at one end of the two battery cell assemblies 300 and the adjacent real battery cell 301, so as to achieve a good connection between the two battery cell assemblies 300 and improve the connection strength.

[0394] In some embodiments, please refer to Figure 3 , Figures 5 to 8 Multiple pressure strips 60 in the housing 20 are symmetrically arranged along the first direction M relative to the center of the accommodating space 201.

[0395] The middle part of the receiving space 201 along the first direction M refers to the middle part of the receiving space 201 along the first direction M, which is also the center plane of the receiving space 201 along the first direction M, and the center plane is perpendicular to the first direction M.

[0396] The multiple pressure strips 60 in the housing 20 are symmetrically arranged along the first direction M relative to the center of the accommodating space 201. This means that the multiple pressure strips 60 installed in the housing 20 to connect the shoulders of two adjacent battery cell assemblies 300 are symmetrically arranged inside the housing 20, and the center of symmetry is the center surface of the accommodating space 201 along the first direction M.

[0397] The above technical solution arranges the multiple pressure strips 60 of the battery device 200 symmetrically, which facilitates the layout of the pressure strips 60, and also makes it easier to determine the pressure strips 60 that need to be connected to the shoulder of the battery cell assembly 300, as well as the connection and fixation between the pressure strips 60 and the corresponding shoulder of the battery cell assembly 300.

[0398] In some embodiments, the pressure strip 60 is bonded to the shoulder of the battery cell assembly 300.

[0399] The bonding of the pressure strip 60 to the shoulder of the battery cell assembly 300 means that the pressure strip 60 is connected to the shoulder of the corresponding battery cell assembly 300 by adhesive, so as to facilitate the connection and fixation of the pressure strip 60 to the shoulder of the battery cell assembly 300.

[0400] As an example, the pressure strip 60 can be bonded and fixed to the shoulder of the battery cell assembly 300 by structural adhesive or double-sided adhesive.

[0401] In some embodiments, the retaining strip 60 is bonded to the shoulder of the dummy battery cell 302 using adhesive. Since the materials used to make the retaining strip 60 and the dummy battery cell 302 are similar—for example, both can be made of plastic, or both can include resin—the adhesive bonding between the retaining strip 60 and the shoulder of the dummy battery cell 302 results in a stronger bond, thereby increasing the connection strength between them.

[0402] By using the above technical solution, the pressure strip 60 is bonded to the shoulder of the battery cell assembly 300, which facilitates the connection and fixation of the pressure strip 60 to the shoulder of the battery cell assembly 300 and improves the installation efficiency of the pressure strip 60.

[0403] In some embodiments, please refer to Figure 3 , Figures 5 to 8 The housing 20 includes a crossbeam 26 located in the middle of the accommodating space 201 along the second direction N. The crossbeam 26 extends along the first direction M. The battery cell assembly 300 includes two sub-battery modules 3011 located on both sides of the crossbeam 26. At least one battery cell assembly 300 has a battery cell 30 near both sides of the crossbeam 26 that is a true battery cell 301.

[0404] The crossbeam 26 refers to the beam structure installed in the accommodating space 201. The crossbeam 26 can be made of materials such as aluminum, steel, plastic, and fiber.

[0405] The middle part of the accommodating space 201 along the second direction N refers to the portion of the accommodating space 201 along the second direction N excluding the two ends.

[0406] The box 20 includes a crossbeam 26 located in the middle of the accommodating space 201 along the second direction N. This means that the crossbeam 26 is located in the middle of the accommodating space 201 along the second direction N. Alternatively, the position of the crossbeam 26 can be set with a certain distance deviation from the middle of the accommodating space 201 along the second direction N.

[0407] The extension of the crossbeam 26 along the first direction M means that the direction in which the horizontal length is located is parallel to the first direction M. Of course, a certain error is allowed, such as an angular error within 5 degrees.

[0408] Sub-battery module 3011 is a segment of battery cell assembly 300.

[0409] The battery cell assembly 300 includes two sub-battery modules 3011 located on both sides of the crossbeam 26, meaning that the battery cell assembly 300 is divided into two sections, and these two sections are the two sub-battery modules 3011 of the battery cell assembly 300, and these two sub-battery modules 3011 are located on opposite sides of the crossbeam 26.

[0410] The statement that at least one battery cell 30 near the two sides of the crossbeam 26 in a battery cell assembly 300 is a true battery cell 301 means that in a plurality of battery cell assemblies 300, at least one battery cell assembly 300 has two sub-battery modules 3011 located on opposite sides of the crossbeam 26, and the battery cells 30 of these two sub-battery modules 3011 near the end of the crossbeam 26 are true battery cells 301.

[0411] By using the above technical solution, a crossbeam 26 is provided in the accommodating space 201 of the housing 20, which can improve the structural strength of the housing 20. Moreover, by placing the crossbeam 26 in the middle of the accommodating space 201 along the second direction N, the battery cell assembly 300 forms sub-battery modules 3011 on both sides of the crossbeam 26. The crossbeam 26 can support each sub-battery module 3011, thereby limiting the expansion and deformation of the actual battery cells 301 in each sub-battery module 3011 during the charging and discharging process.

[0412] In some embodiments, please refer to Figure 3 , Figures 5 to 8 At least one battery cell assembly 300 has two actual battery cells 301 on both sides of the crossbeam 26 electrically connected by a first busbar 53, which spans the top of the crossbeam 26 along a third direction G.

[0413] The first busbar 53 refers to a busbar 50 used to connect the true electrode terminals 331 of the two true battery cells 301 on both sides of the crossbeam 26 to achieve electrical connection between the two true battery cells 301.

[0414] The electrical connection of two true battery cells 301 on both sides of the crossbeam 26 in at least one battery cell assembly 300 via the first busbar 53 means that in a plurality of battery cell assemblies 300, at least one battery cell assembly 300 has two sub-battery modules 3011 located on opposite sides of the crossbeam 26, and the battery cells 30 of the two sub-battery modules 3011 near the end of the crossbeam 26 are true battery cells 301, and the two true battery cells 301 are electrically connected via the first busbar 53.

[0415] The first busbar 53 spans the top of the crossbeam 26 along the third direction G, meaning that the first busbar 53 passes over the top of the crossbeam 26 along the third direction G. In other words, the first busbar 53 crosses the upper surface of the crossbeam 26 along the height direction Z to connect the true battery cells 301 on both sides of the crossbeam 26.

[0416] By using the above technical solution, a first busbar 53 is set up to connect the two true battery cells 301 on both sides across the top of the crossbeam 26, which can achieve a good electrical connection between the true battery cells 301 on both sides of the crossbeam 26.

[0417] In some embodiments, a clearance groove or opening may also be provided in the crossbeam 26 so that the first busbar 53 passes through the crossbeam 26 to connect the actual battery cells 301 on both sides.

[0418] In some embodiments, please refer to Figure 3 , Figures 5 to 8 The pressure strip 60, adjacent to the first busbar 53, spans the top of the crossbeam 26 along the third direction G.

[0419] The pressure strip 60 adjacent to the first busbar 53 means that the pressure strip 60 is located on one side of the first busbar 53 and is adjacent to the first busbar 53. That is to say, in the first direction M, the distance between the first busbar 53 and the pressure strip 60 is less than the distance between the first busbar 53 and other pressure strips 60 in the housing 20.

[0420] Through the above technical solution, the pressure strip 60 adjacent to the first busbar 53 spans the top of the crossbeam 26, which facilitates the manufacturing and installation of the pressure strip 60. It can also effectively connect the shoulders of the corresponding two battery cell assemblies 300, and the crossbeam 26 can support the pressure strip 60 to more stably fix it in place, so that the pressure strip 60 can fix the corresponding two battery cell assemblies 300 in the housing 20. In addition, the installation of the pressure strip 60 can also provide insulation protection for the side of the first busbar 53, thereby improving the insulation protection performance of the first busbar 53.

[0421] In some embodiments, please refer to Figure 3 , Figure 19In at least one battery cell assembly 300: two real battery cells 301 located on the same side of the crossbeam 26 and close to the crossbeam 26 are electrically connected through a second busbar 54, and the pressure strip 60 adjacent to the second busbar 54 consists of two sub-segments 64, which are located on opposite sides of the crossbeam 26 respectively.

[0422] At least one battery cell assembly 300 means one or more battery cell assemblies 300.

[0423] Two genuine battery cells 301 located on the same side of the crossbeam 26 and close to the crossbeam 26 mean that the two genuine battery cells 301 are located on the same side of the crossbeam 26, and the two genuine battery cells 301 are adjacent to each other in the second direction N, and one of the two genuine battery cells 301 is located close to the crossbeam 26.

[0424] In at least one battery cell assembly 300: two genuine battery cells 301 located on the same side of the crossbeam 26 and close to the crossbeam 26 mean that the two genuine battery cells 301 are located in the same battery cell assembly 300 and on the same side of the crossbeam 26, and the two genuine battery cells 301 are adjacent to each other, with one of them being close to the crossbeam 26.

[0425] In at least one battery cell assembly 300: the electrical connection of two genuine battery cells 301 located on the same side of the crossbeam 26 and close to the crossbeam 26 via a second busbar 54 means that the two genuine battery cells 301 are electrically connected using the second busbar 54. That is, the second busbar 54 connects the genuine electrode terminals 331 on the two genuine battery cells 301, thereby realizing the electrical connection of the two genuine battery cells 301.

[0426] The second busbar 54 refers to a busbar 50 used to connect the true electrode terminals 331 of two true battery cells 301 located on the same side of the crossbeam 26, close to the crossbeam 26, and in the same battery cell assembly 300, so as to realize the electrical connection between the two true battery cells 301.

[0427] The pressure strip 60 adjacent to the second busbar 54 means that the pressure strip 60 is located on one side of the second busbar 54 and is adjacent to the second busbar 54. That is to say, in the first direction M, the distance between the second busbar 54 and the pressure strip 60 is less than the distance between the second busbar 54 and other pressure strips 60 in the housing 20.

[0428] Sub-segment 64 refers to a section of the pressure strip 60.

[0429] The pressure strip 60 adjacent to the second busbar 54 is divided into two sub-segments 64, meaning that the pressure strip 60 is separated into two independent sections by the crossbeam 26.

[0430] The two segments 64 are located on opposite sides of the crossbeam 26, meaning that one segment 64 is located on one side of the crossbeam 26 and the other segment 64 is located on the other side of the crossbeam 26.

[0431] By using the above technical solution, the pressure strip 60 is divided into two sub-segments 64, which are respectively set on both sides of the crossbeam 26. This allows for the convenient setting of the length of the corresponding sub-segments 64 according to the dimensions of the sub-battery modules 3011 on both sides of the crossbeam 26 along the second direction N. This enables the sub-segments 64 of the pressure strip 60 to connect the shoulders of the corresponding two sub-battery modules 3011. Furthermore, the pressure strip 60 does not need to occupy the top space of the crossbeam 26 along the third direction G, thus reducing interference between the pressure strip 60 and the crossbeam 26.

[0432] In some embodiments, in the same battery cell assembly 300: two true electrode terminals 331 of two true battery cells 301 on opposite sides of the crossbeam 26 at the same end along the first direction M are electrically connected by a first busbar 53, which spans the top of the crossbeam 26; and in these two true battery cells 301: the true electrode terminals 331 of each true battery cell 301 on the other side along the first direction M are connected by a second busbar 54 to the true electrode terminals 331 on the side of the true battery cell 301 opposite to the crossbeam 26.

[0433] In some embodiments, the pressure strip 60 adjacent to the second busbar 54 may also be a single strip and is disposed across the top of the crossbeam 26.

[0434] In some embodiments, the pressure strip 60 is in the form of a flat strip.

[0435] Flat strip refers to a shape that is strip-shaped as a whole and has a rectangular or rectangular cross-section.

[0436] With the above technical solution, the pressure strip 60 is set in a flat strip shape, which has a simple structure and is easy to process and manufacture. When it is installed on the shoulder of the battery cell assembly 300, there is no need to distinguish between the front and back, and the assembly and connection are convenient.

[0437] In some embodiments, the pressure strip 60 includes a connecting portion 601 and protrusions 602 located on both sides of the connecting portion 601 along a first direction M. The protrusions 602 protrude from the corresponding side of the connecting portion 601 along a third direction G toward the side opposite to the battery cell 30, thereby forming a groove-like structure with the connecting portion 601 and the two protrusions 602. The connecting portion 601 is flat and strip-shaped, and is used to connect to the shoulder of the battery cell assembly 300. The protrusions 602 can abut against the top cover 21 of the housing 20 to press the connecting portion 601 against the shoulder of the battery cell assembly 300, thereby improving the stability of the connection between the connecting portion 601 and the shoulder.

[0438] In some embodiments, the pressure strip 60 includes a plurality of sheet layers stacked together.

[0439] A sheet layer refers to a sheet-like structural layer. Sheet layers can be made of materials such as plastics, metals, rubber, fibers, and epoxy resins.

[0440] Multiple sheet material layers stacked together refer to multiple sheet material layers stacked on top of each other.

[0441] Through the above technical solution, the pressure strip 60 uses multiple layers of sheet material stacked together, which can improve the structural strength and fatigue resistance of the pressure strip 60, so as to stably connect to the shoulder of the battery cell assembly 300 and improve the structural strength and reliability of the connection.

[0442] In some embodiments, please refer to Figure 3 and Figure 17 The battery device 200 includes a separator 45 covering a plurality of pressure strips 60 on the side away from the battery cell 30. A conductive bar 71 is provided on the separator 45 at a position corresponding to at least one pressure strip 60. The conductive bar 71 is provided on the side of the separator 45 away from the pressure strips 60. A first buffer bar 72 is provided between the conductive bar 71 and the separator 45. A second buffer bar 73 is provided on the side of the conductive bar 71 away from the separator 45.

[0443] The separator 45 refers to the plate covering the multiple battery cell modules 300 in the housing space 201. The separator 45 can be made of materials such as mica, plastic, and fiber. By installing the separator 45 in the housing 20, good insulation can be achieved between the top cover 21 of the housing 20 and the battery cells 30.

[0444] The separator 45 covering the side of the multiple pressure strips 60 away from the battery cell 30 means that the separator 45 is located on the side of the pressure strip 60 away from the battery cell 30. When the separator 45 covers the multiple battery cells 30, the separator 45 also covers each pressure strip 60.

[0445] A busbar 71 is a strip-shaped component made of conductive material that can conduct electric current. Busbar 71 can be made of materials such as copper and aluminum. It can also be made of wire.

[0446] The provision of conductive strips 71 on the partition 45 at positions corresponding to at least one pressure strip 60 means that conductive strips 71 are provided on the partition 45 at positions corresponding to one or more pressure strips 60, and the conductive strips 71 are directly opposite the pressure strips 60 in the third direction G, that is, the projection of the conductive strips 71 along the third direction G at least partially coincides with the projection of the pressure strips 60 along the third direction G, so as to provide buffering and support for the corresponding conductive strips 71 through the pressure strips 60.

[0447] The conductive bar 71 is located on the side of the partition 45 away from the pressure strip 60, which means that the conductive bar 71 and the pressure strip 60 are located on opposite sides of the partition 45, so that the conductive bar 71 and the pressure strip 60 are separated by the partition 45.

[0448] The first buffer strip 72 refers to a strip-shaped component made of elastic material that provides elastic cushioning. The first buffer strip 72 can be made of materials such as foam, rubber, or silicone.

[0449] The first buffer strip 72 between the conductive busbar 71 and the partition plate 45 means that the first buffer strip 72 is located between the conductive busbar 71 and the partition plate 45, so as to support the conductive busbar 71 and provide buffer for the conductive busbar 71, thereby reducing the wear between the conductive busbar 71 and the partition plate 45.

[0450] The second buffer strip 73 refers to a strip-shaped component made of elastic material that provides elastic cushioning. The second buffer strip 73 can be made of materials such as foam, rubber, or silicone.

[0451] The fact that the conductive bar 71 is provided with a second buffer strip 73 on the side away from the separator 45 means that the conductive bar 71 is located between the second buffer strip 73 and the separator 45. So that after the battery device 200 is assembled, the top cover 21 of the box 20 can hold the second buffer strip 73, thereby holding and fixing the conductive bar 71, and the second buffer strip 73 provides a buffer protection for the conductive bar 71.

[0452] Through the above technical solution, a conductive bar 71 is provided on the side of the partition 45 away from the pressure strip 60 to provide electrical connection. The conductive bar 71 is positioned at the corresponding position of the pressure strip 60, which can effectively support the conductive bar 71 and provide a certain degree of elastic buffer. The first buffer strip 72 and the second buffer strip 73 are respectively provided on both sides of the conductive bar 71, which can provide good protection for the conductive bar 71 in the height direction Z, and can also effectively support and fix the conductive bar 71, reducing the risk of displacement or loosening of the conductive bar 71 due to vibration, and improving the reliability of the installation of the conductive bar 71.

[0453] In some embodiments, please refer to Figure 2 and Figure 13 The dummy battery cell 302 protrudes from the top surface of the real battery cell 301 along the third direction G. The side of the dummy battery cell 302 is provided with a receiving groove 395, and the pressure strip 60 extends into the receiving groove 395.

[0454] The dummy battery cell 302 protrudes from the top surface of the real battery cell 301 along the third direction G, meaning that in the height direction Z, the height dimension of the dummy battery cell 302 is greater than the dimension of the real battery cell 301.

[0455] The receiving groove 395 refers to the groove structure set on the side of the dummy battery cell 302.

[0456] The extension of the pressure strip 60 into the receiving groove 395 means that the part of the pressure strip 60 that connects to the dummy battery cell 302 extends into the receiving groove 395 on the dummy battery cell 302, so that the pressure strip 60 is connected to the side wall of the receiving groove 395, thereby connecting the pressure strip 60 to the dummy battery cell 302.

[0457] Since the height of the dummy battery cell 302 is greater than that of the real battery cell 301, a receiving groove 395 is provided on the side of the pressure strip 60 so that the receiving groove 395 is flush with the top surface of the real battery cell 301, so that the pressure strip 60 can extend into the receiving groove 395.

[0458] By providing the above technical solution, a receiving groove 395 is provided on the side of the dummy battery cell 302 to receive and connect the pressure strip 60, which can improve the connection strength between the pressure strip 60 and the dummy battery cell 302, thereby more stably locking the pressure strip 60, so that the pressure strip 60 is more stably connected to the shoulder of the battery cell assembly 300, and improving the structural strength of the connection.

[0459] In some embodiments, please refer to Figure 14 , Figure 2 and Figure 13 The housing 20 includes a first beam 27, which abuts against the end of the battery cell assembly 300 along the second direction N. A buffer plate 43 is provided between the dummy battery cell 302 and the first beam 27.

[0460] The first beam 27 refers to the beam structure in the battery device 200. As an example, the first beam 27 can be a partial beam forming the frame of the housing 20. As an example, the first beam 27 can also be a limiting beam of the housing 20.

[0461] The first beam 27 abuts against the end of the battery cell assembly 300 along the second direction N means that the first beam 27 is located at one end of the battery cell assembly 300 along the second direction N and abuts against the battery cell assembly 300 to limit the expansion and deformation of the actual battery cells 301 in the battery cell assembly 300.

[0462] Buffer plate 43 refers to a pad structure that can undergo elastic deformation to provide a cushioning effect. Buffer plate 43 can be made of elastic rubber, silicone, or polymer foam material.

[0463] The above technical solution provides that by setting the first beam 27, the expansion and deformation of the battery cell 30 can be limited, and by setting the buffer plate 43 between the dummy battery cell 302 and the first beam 27, the dummy battery cell 302 can be protected.

[0464] In some embodiments, along the first direction M, the buffer plate 43 covers at least two battery cell assemblies 300 to reduce the number of buffer plates 43.

[0465] In some embodiments, the size of the buffer plate 43 along the first direction M matches the size of the battery cell assembly 300. That is, the size of the buffer plate 43 along the first direction M is the same as the size of the battery cell assembly 300 along the first direction M. Of course, a certain error is allowed, such as a size error within 5%. This structure allows the number of buffer plates 43 to be set according to the number of battery cell assemblies 300.

[0466] In some embodiments, please refer to Figure 14 , Figures 3 to 19 and ​ At least two adjacent battery cell assemblies 300 are provided with end true battery cells 301 along the second direction N toward the first beam 27. The busbar 50 includes a second bridging bar 52 for electrically connecting two adjacent end true battery cells 301. The second bridging bar 52 is fixed to the first beam 27 and along the second direction N. The size of the second bridging bar 52 is larger than the size of the first beam 27.

[0467] At least two adjacent battery cell modules 300 refers to two or more battery cell modules 300 that are adjacent in number.

[0468] The end true battery cell 301 refers to the true battery cell 301 located at one end of the battery cell assembly 300 along the second direction N.

[0469] The phrase "at least two adjacent battery cell assemblies 300 have end true battery cells 301 at one end along the second direction N toward the first beam 27" means that there are two or more adjacent battery cell assemblies 300, and these battery cell assemblies 300 have end true battery cells 301 at one end along the second direction N toward the first beam 27.

[0470] The second crossover 52 refers to the two end cells 301 used to connect one end of two adjacent battery cell assemblies 300, and is a busbar 50 connected to the two electrode terminals 33 at both ends of the two end cells 301 along the first direction M.

[0471] The second spanning strip 52 is fixed to the first beam 27 by means of a structure such as cable ties 410, buckles, double-sided tape, fasteners, etc., so that the first beam 27 can support the second spanning strip 52.

[0472] Along the second direction N, the size of the second bridging bar 52 is greater than that of the first beam 27, meaning that the width of the second bridging bar 52 along the second direction N is greater than that of the first beam 27 along the second direction N. This allows the cross-section of the second bridging bar 52 to be larger, so that the second bridging bar 52 can conduct a larger current, which facilitates the stable operation of the battery device 200.

[0473] Through the above technical solution, a second bridging strip 52 is set up to electrically connect the end true battery cells 301 of two adjacent battery cell assemblies 300; the second bridging strip 52 is fixed on the first beam 27 to facilitate the installation and fixation of the second bridging strip 52.

[0474] In some embodiments, the structure of the first crossbar 51 can be the same as that of the second crossbar 52 to facilitate manufacturing and reduce costs.

[0475] In some embodiments, the structure of the first crossover bar 51 may differ from that of the second crossover bar 52. For example, the thickness of the first crossover bar 51 may differ from the thickness of the second crossover bar 52. For example, the length of the first crossover bar 51 may differ from the length of the second crossover bar 52. For example, the width of the first crossover bar 51 may differ from the width of the second crossover bar 52.

[0476] In some embodiments, when the housing 20 includes a first beam 27 and a pressure strip 60, the pressure strip 60 is connected to the first beam 27.

[0477] The connection between the pressure strip 60 and the first beam 27 means that the pressure strip 60 is fixed to the first beam 27 by means of welding, bonding, screws or clips, so that the pressure strip 60 is connected and fixed through the first beam 27.

[0478] By connecting the pressure strip 60 to the first beam 27 through the above technical solution, the pressure strip 60 can be fixed more stably. The pressure strip 60 connects to the shoulder of the adjacent battery cell assembly 300, thereby improving the connection strength between the first beam 27 and the battery cell assembly 300, so as to better fix the battery cell assembly 300 and improve the structural stability and vibration resistance of the battery device 200.

[0479] Please see ​According to some embodiments of this application, this application provides a battery device 200, including a housing 20, a plurality of battery cell assemblies 300, and a busbar 50; the housing 20 has a receiving space 201; the plurality of battery cell assemblies 300 are arranged in the receiving space 201 along a first direction M, each battery cell assembly 300 including a plurality of battery cells 30, the plurality of battery cells 30 being arranged along a second direction N, at least one of the plurality of battery cells 300 including a real battery cell 301 and a dummy battery cell 302, the dummy battery cell 302 being located at at least one end of the corresponding battery cell assembly 300 along the second direction N; the busbar 50 is electrically connected to the plurality of real battery cells 301; the busbar 50 includes a first bridging bar 51, at least a portion of the first bridging bar 51 being disposed in a third direction G of the dummy battery cells 302, the first direction M being perpendicular to the second direction N, the first direction M being perpendicular to the third direction G, and the second direction N being perpendicular to the third direction G. Along the first direction M, a plurality of fixing structures 41 are connected to the first jumper bar 51. Adjacent fixing structures 41 are spaced apart and are respectively mounted on adjacent dummy battery cells 302. Each dummy battery cell 302 has a first groove 392, a second groove 393, and a socket 391. The first groove 392 is located at the bottom of the second groove 393, and the depth of the first groove 392 is greater than the depth of the second groove 393. Along the second direction N, the size of the first groove 392 is smaller than the size of the second groove 393. The socket 391 is located at the bottom of the first groove 392. The fixing structure 41 includes a cable tie 410, which includes a socket 412 and a cable tie body 411. The cable tie body 411 is mounted on the socket 412, which is inserted into the socket 391. The cable tie body 411 is used to bind the first jumper bar 51.

[0480] Multiple fixing structures 41 are provided on the dummy battery cell 302 to stably fix the first crossover bar 51 to the dummy battery cell 302. The first crossover bar 51 is supported by the dummy battery cell 302, eliminating the need for secondary processing of the fixing structures 41 on the beam of the housing 20, thus simplifying the manufacturing process of the battery device 200. The fixing structures 41 use cable ties 410, which include a cable tie body 411 and a socket 412. The cable tie body 411 is used to connect the first crossover bar 51, and the socket 412 is provided to fix the cable tie body 411. The dummy battery cell 302 is provided with a socket 391, and the socket 412 is inserted into the socket 391, which can easily fix the socket 412 to the dummy battery cell 302, thereby fixing the cable tie body 411 to the dummy battery cell 302, making assembly convenient. A second groove 393 is provided on the dummy battery cell 302, and a first groove 392 is provided at the bottom of the second groove 393, such that the depth of the first groove 392 is greater than the depth of the second groove 393, and the dimension of the first groove 392 along the second direction N is smaller than the dimension of the second groove 393. A stepped structure can be formed on multiple sides of the first groove 392 on the dummy battery cell 302 to improve the structural strength of the top surface of the dummy battery cell 302.

[0481] According to some embodiments of this application, this application also provides an electrical device, including a battery device 200 as described in the above embodiments, the battery device 200 being used to store or provide electrical energy.

[0482] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The container has storage space; Multiple battery cell assemblies are disposed in the receiving space, and the multiple battery cell assemblies are arranged along a first direction. At least one of the battery cell assemblies includes a real battery cell and a dummy battery cell arranged along a second direction. The dummy battery cell is located at at least one end of the corresponding battery cell assembly along the second direction. A busbar electrically connects multiple dummy battery cells; the busbar includes a first bridging bar, at least a portion of which is disposed in a third direction of the dummy battery cells, the first direction being perpendicular to a second direction, the first direction being perpendicular to the third direction, and the second direction being perpendicular to the third direction. The dummy battery cell is provided with a fixing structure, which is connected to the first crossbar and is used to fix the first crossbar. At least one end of two adjacent battery cell assemblies is provided with the dummy battery cell, and the first bridging bar passes through the third direction of the two adjacent dummy battery cells. The first bridging bar is used to electrically connect two real battery cells that are adjacent to the two dummy battery cells along the second direction. Along the first direction, the size of the dummy battery cell is greater than or equal to the size of one of the real battery cells.

2. The battery device as claimed in claim 1, characterized in that, The fixing structure includes cable ties, which are used to bind and connect the first crossover strip.

3. The battery device as claimed in claim 2, characterized in that, The dummy battery cell has a socket, and the cable tie includes a socket and a cable tie body. The cable tie body is installed on the socket, and the socket is inserted into the socket. The cable tie body is used to bind the first jumper bar.

4. The battery device as claimed in claim 3, characterized in that, The dummy battery cell has a first groove for accommodating the socket, and the socket is located at the bottom of the first groove.

5. The battery device as claimed in claim 4, characterized in that, The dummy battery cell has a second groove, and the first groove is located at the bottom of the second groove. The depth of the first groove is greater than the depth of the second groove. Along the second direction, the size of the first groove is smaller than the size of the second groove.

6. The battery device according to any one of claims 1-5, characterized in that, The top surface of the dummy battery cell has a strip-shaped baffle protruding from the side facing the real battery cell along the second direction.

7. The battery device according to any one of claims 1-5, characterized in that, The top surface of the dummy battery cell has a protruding first dummy electrode terminal, which is located on the side of the first bridging bar away from the real battery cell, and is used to limit the displacement of the first bridging bar away from the real battery cell.

8. The battery device according to any one of claims 1-5, characterized in that, The top surface of the dummy battery cell has a protruding second dummy electrode terminal, which supports the first jumper bar.

9. The battery device as described in any one of claims 1-5, characterized in that, The fixing structure is located at the middle of the dummy battery cell along the first direction.

10. The battery device according to any one of claims 1-5, characterized in that, The dummy battery cell includes a housing with an inner cavity, and the fixing structure is mounted on the housing.

11. The battery device according to any one of claims 1-5, characterized in that, The dummy battery cell includes a housing with an inner cavity, the inner cavity being open on the side opposite to the real battery cell along the second direction.

12. The battery device as claimed in claim 11, characterized in that, The inner cavity is provided with ribs, which protrude from the outer shell along the second direction towards the open side of the inner cavity near the actual battery cell.

13. The battery device as claimed in claim 12, characterized in that, The reinforcing bars are arranged in a grid pattern.

14. The battery device as claimed in claim 12, characterized in that, The ribs include a plurality of first ribs spaced apart along the first direction, and each first rib extends along the third direction.

15. The battery device according to any one of claims 12-14, characterized in that, The ribs include a plurality of second ribs spaced apart along the third direction, each of the second ribs extending along the first direction.

16. The battery device as claimed in claim 10, characterized in that, The outer casing has a closed, flat plate shape on the sidewall facing the actual battery cell.

17. The battery device according to any one of claims 1-5, 12-14, and 16, characterized in that, Along the second direction, a buffer pad is provided between the dummy battery cell and the real battery cell.

18. The battery device according to any one of claims 1-5, 12-14, and 16, characterized in that, Along the second direction, the periphery of the side of the dummy battery cell facing the real battery cell is provided with an adhesive layer, and the adhesive layer is bonded to the real battery cell.

19. The battery device as claimed in claim 18, characterized in that, The adhesive layer is divided into four sections, which are respectively disposed on the four sides of the dummy battery cell, and the four sections are connected end to end to form a frame.

20. The battery device according to any one of claims 1-5, 12-14, 16, and 19, characterized in that, Along the first direction, the size of the dummy battery cell is greater than or equal to the size of two real battery cells.

21. The battery device according to any one of claims 1-5, 12-14, 16, and 19, characterized in that, Along the first direction, a plurality of the fixing structures are connected to the first bridging bar, with adjacent fixing structures spaced apart, and adjacent fixing structures are respectively disposed on adjacent dummy battery cells.

22. The battery device as claimed in claim 21, characterized in that, The distance between two adjacent fixed structures ranges from 100mm to 300mm.

23. The battery device as claimed in claim 22, characterized in that, The distance between two adjacent fixed structures ranges from 150mm to 200mm.

24. The battery device according to any one of claims 1-5, 12-14, 16, 19, 22-23, characterized in that, Along the second direction, the size of the dummy battery cell is adapted such that the size of the battery cell assembly containing the dummy battery cell is equal to the size of the adjacent battery cell assembly.

25. The battery device according to any one of claims 1-5, 12-14, 16, 19, 22-23, characterized in that, Along the second direction or the third direction, the size of the dummy battery cell is equal to the size of one of the real battery cells.

26. The battery device according to any one of claims 1-5, 12-14, 16, 19, 22-23, characterized in that, Along the second direction, the size of the dummy battery cell is greater than or equal to the size of two real battery cells.

27. The battery device according to any one of claims 1-5, 12-14, 16, 19, 22-23, characterized in that, The first jumper bar includes a conductive body, a first insulating layer on the conductive body, and a second insulating layer wrapped around the conductive body at a position corresponding to the fixed structure.

28. The battery device as claimed in claim 27, characterized in that, The second insulating layer is disposed between the first insulating layer and the fixing structure; And / or, the conductive body is provided with a third insulating layer, which is disposed between the first insulating layer and the conductive body.

29. The battery device according to any one of claims 1-5, 12-14, 16, 19, 22-23, and 28, characterized in that, The dummy battery cell is made of plastic.

30. The battery device according to any one of claims 1-5, 12-14, 16, 19, 22-23, and 28, characterized in that, The housing includes a first beam that abuts against the end of the battery cell assembly along the second direction, and a buffer plate is provided between the dummy battery cell and the first beam.

31. The battery device as claimed in claim 30, characterized in that, At least two adjacent battery cell assemblies have end cells facing one end of the first beam along the second direction. The busbar includes a second bridging bar for electrically connecting two adjacent end cells. The second bridging bar is fixed to the first beam and its size is larger than that of the first beam along the second direction.

32. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-31, the battery device being used to store or provide electrical energy.

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