Battery pack and electric device

Abstract

The application relates to the battery technical field and discloses a battery pack and a power utilization device, which comprise a box body, a battery pack, a switching piece and a mounting seat. The battery pack comprises a plurality of single batteries arranged and arranged, the battery pack is accommodated in a containing cavity of the box body, and the mounting of the battery pack is realized. The mounting seat is located at one side of the battery pack, thereby providing a connecting basis for the side of the battery pack. An output row and the switching piece are connected to a first mounting portion of the mounting seat, a second mounting portion of the mounting seat is connected to the first mounting portion and movably connected to the box body, and the mounting seat has a certain movement allowance relative to the box body and the battery pack. When the battery pack expands due to charging and discharging, the expansion force of the battery pack acts on the output row, the switching piece and the mounting seat, the second mounting portion can adaptively move, the output row, the switching piece and the mounting seat have the movement allowance at one side of the battery pack, and rigid extrusion between the structures is effectively avoided.

Description

Technical Field

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

[0002] In related technologies, battery packs typically house the battery pack within a casing, with electrical connections and energy output achieved near the ends of the battery pack via connection structures such as output pins. In practical applications, the expansion of the battery pack during operation can easily damage these connection structures, affecting the reliability of the battery pack's electrical connections and its lifespan. Summary of the Invention

[0003] This application aims to provide a battery pack and power device that at least solves the problem of structural damage caused by battery pack expansion.

[0004] In a first aspect, embodiments of this application propose a battery pack, including a housing, a battery assembly, an adapter, and a mounting base. The housing has an open receiving cavity, in which the battery assembly is disposed. The battery assembly includes multiple individual cells and an output row. The multiple individual cells are arranged along a first direction, and the individual cells arranged at the ends along the first direction are connected to the output row. The adapter is located on one side of the battery assembly along the first direction, and the adapter is electrically connected to the output row. The mounting base is located on one side of the battery assembly along the first direction, and includes a first mounting portion and a second mounting portion connected to each other. The adapter and the output row are both connected to the first mounting portion, and the second mounting portion is movably connected to the housing along the first direction.

[0005] Secondly, embodiments of this application provide an electrical device including the battery pack mentioned in the first aspect.

[0006] The embodiments of this application have at least the following beneficial effects: The battery pack includes multiple individual cells arranged along a first direction. The battery pack is housed within the receiving cavity of the casing, enabling battery pack installation. The mounting base is located on one side of the battery pack along the first direction, providing a connection base on the side of the battery pack along the first direction. The output port and adapter are connected to the first mounting portion of the mounting base, while the second mounting portion of the mounting base is connected to the first mounting portion and movably connected to the casing along the first direction, allowing the mounting base as a whole to have a certain amount of movement relative to the casing and the battery pack in the first direction. When the battery pack expands due to charging and discharging, the expansion force along the first direction acts on the output port, adapter, and mounting base. The second mounting portion can adaptably move along the first direction, allowing the output port, adapter, and mounting base to have a certain amount of movement on one side of the battery pack along the first direction. This effectively avoids rigid compression between these structures and damage, allowing expansion stress to be effectively released, ensuring the stability of the electrical connection, and thus improving the safety and service life of the battery pack. The battery pack, when applied to electrical devices, can effectively improve the reliability and stability of the electrical device's operation.

[0007] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0008] Figure 1 This is a partial schematic diagram of a top view of a battery pack according to an embodiment of this application; Figure 2 This is a partial schematic diagram of the end structure of the battery pack in an embodiment of this application; Figure 3 This is a partial schematic diagram of the mounting bracket in a battery pack according to an embodiment of this application; Figure 4 This is a partial schematic diagram of a crossbeam in a battery pack according to an embodiment of this application; Figure 5 This is a partial structural diagram of the mounting base in a battery pack according to an embodiment of this application; Figure 6 This is a partial schematic diagram of a crossbeam in a battery pack according to an embodiment of this application; Figure 7 This is a partial schematic diagram of the mounting bracket in a battery pack according to an embodiment of this application; Figure 8 This is a partial schematic diagram of a battery pack housing support adapter according to an embodiment of this application; Figure 9 This is a partial schematic diagram of a crossbeam in a battery pack according to an embodiment of this application; Figure 10 This is a schematic diagram of the structure of the first busbar in a battery pack according to an embodiment of this application.

[0009] Figure label: Box 100; 130 crossbeam; 131 beam body; 1311 mounting groove; 1312 first groove wall; 1313 second groove wall; 1314 third groove wall; 1315 fourth groove wall; 132 connecting part; 1321 locking hole; 133 bearing platform; 140 frame; 150 longitudinal beam; Battery pack 200; Individual cell 210; First individual cell 210a; Second individual cell 210b; Terminal post 211; Output bus 220; First connection hole 221; First busbar 230; First layer 231; Second layer 232; Bending portion 233; Second busbar 240; Adapter 300; Second connecting hole 310; Mounting base 400; First mounting part 410; mounting hole 411; second mounting part 420; snap fastener 421; limiting part 422; fastener 430; end; Protective components 500; buffer pad 600; First direction X; second direction Y; third direction Z. Detailed Implementation

[0010] The following will clearly and completely describe the concept and technical effects of this application in conjunction with embodiments, so as to fully understand the purpose, features and effects of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0011] In the description of the embodiments of this application, if directional descriptions are involved, such as "up", "down", "front", "back", "left", "right" etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0012] In the description of the embodiments of this application, if a feature is referred to as "setting," "fixing," "connecting," or "installing" on another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of this application, if "several" is involved, it means one or more; if "multiple" is involved, it means two or more; if "greater than," "less than," or "exceeds," it should be understood as excluding the stated number; if "above," "below," or "within," it should be understood as including the stated number. If "first" or "second" is involved, it should be understood as used to distinguish technical features, and not as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0013] The battery pack comprises multiple individual cells arranged along a first direction. During operation, the expansion of these individual cells primarily occurs along the arrangement direction (i.e., the first direction). Within this arrangement direction, the cumulative expansion of multiple individual cells is most pronounced at the ends of the cells along the arrangement direction, and this expansion displacement is transmitted to the connected output pins and adapters. Because the output pins and adapters are rigidly fixed to the housing in traditional installation methods, they are subjected to expansion forces that cannot be effectively released. This results in the connection points between the output pins and adapters being subjected to alternating compressive or tensile loads for extended periods, making them highly susceptible to structural damage and severely impacting the electrical connection reliability and lifespan of the battery pack.

[0014] refer to Figures 1 to 3The battery pack of this embodiment includes a housing 100, a battery pack 200, an adapter 300, and a mounting base 400. The battery pack 200 is placed inside the housing 100. The adapter 300 and the mounting base 400 are located on one side of the battery pack 200 along a first direction X. The battery pack 200 is connected to the adapter 300 via an output port 220 to achieve an output connection. The adapter 300 and the output port 220 are connected to the mounting base 400 to achieve a stable connection. The mounting base 400 is movably connected to the housing 100 along the first direction X, providing displacement space for the output port 220 and the adapter 300. Thus, the mounting base 400, the adapter 300, and the output port 220 can move as a whole relative to the housing 100 as the battery pack 200 expands, avoiding relative movement between the mounting base 400, the adapter 300, and the output port 220, and effectively preventing structural damage caused by the expansion of the battery pack 200.

[0015] The battery pack has a first direction X. The housing 100 has an open receiving cavity, and the battery pack 200 is located in the receiving cavity. The battery pack 200 includes multiple individual batteries 210 and an output bar 220. The multiple individual batteries 210 are arranged along the first direction X. The individual batteries 210 arranged at the ends along the first direction X are connected to the output bar 220. The adapter 300 is located on one side of the battery pack 200 along the first direction X, and the adapter 300 is electrically connected to the output bar 220. Thus, the battery pack 200 conducts electrical energy to the adapter 300 through the output bar 220, and outputs electrical energy to the outside through the adapter 300, realizing electrical conduction with the external circuit.

[0016] Since the individual cells 210 are arranged along the first direction X, the expansion of each individual cell 210 will cause the battery pack 200 as a whole to undergo cumulative deformation along the first direction X, causing the output row 220 to be displaced along the first direction X, and then pushed towards the adapter 300 and the mounting base 400 through the output row 220. The mounting base 400 is located on one side of the battery pack 200 along the first direction X. The mounting base 400 includes a first mounting part 410 and a second mounting part 420 connected to each other. The adapter 300 and the output port 220 are both connected to the first mounting part 410. The second mounting part 420 is movably connected to the housing 100 along the first direction X, so that the mounting base 400, the output port 220 and the adapter 300 connected to the mounting base 400 can have a certain amount of movement in the first direction X, so that they can move adaptively as the battery pack 200 expands, so as to prevent the output port 220 or the adapter 300 from being squeezed. Furthermore, the mounting base 400, the output port 220 and the adapter 300 can move together, which can also effectively prevent relative movement between the mounting base 400, the output port 220 and the adapter 300 from causing stress concentration at the connection position, effectively reducing the risk of connection failure, thereby maintaining the stability of the electrical connection between the adapter 300 and the output port 220.

[0017] In addition, in the battery pack of this application embodiment, the second mounting part 420 is movably connected to the housing 100, enabling the mounting base 400 to move relative to the housing 100. The housing 100 also serves as the mounting base for the battery pack 200. Therefore, the movement of the mounting base 400 has the same direction and trend as the expansion and deformation of the battery pack 200 and the displacement of the output row 220 caused by the expansion of the battery pack 200. This effectively avoids the constraint of the mounting base 400 on the deformation of the battery pack 200, and keeps the connection between the mounting base 400, the output row 220 and the adapter 300 in a low-stress state, reducing the risk of fatigue fracture and contact failure of the connector.

[0018] When the battery pack 200 expands due to charging and discharging, the expansion force along the first direction X acts on the output port 220, the adapter 300, and the mounting base 400. The second mounting part 420 can adaptively move along the first direction X, allowing the output port 220, adapter 300, and mounting base 400 as a whole to move along one side of the battery pack 200 along the first direction X. This effectively avoids rigid compression between these structures, preventing connection failure or damage to the structural components themselves, and effectively ensures the stability of the electrical connection. The contraction after expansion is similar. When the battery pack 200 cools and contracts, the second mounting part 420 synchronously moves back towards the battery pack 200 along the first direction X, thereby compensating for changes in the gap between the output port 220 and the adapter 300. This ensures that the electrical path of the battery pack 200 remains intact throughout its cycle life, thereby improving the safety and service life of the battery pack.

[0019] Understandably, in superchargeable battery packs, to meet the demands of high-rate supercharging, the electrochemical activity of the individual cells 210 inside the battery pack 200 is significantly enhanced. However, this also leads to a significant increase in the expansion rate of the individual cells 210 during charging and discharging, especially under supercharging conditions. Compared to conventional rate battery packs, the expansion and contraction of the battery pack 200 during charging and discharging in superchargeable battery packs are more pronounced in the displacement changes of the individual cells 210 at the ends along the arrangement direction of the individual cells 210. High-rate charging and discharging causes more drastic displacement changes in the end individual cells 210, further exacerbating the risk of damage to the aforementioned end output outlet 220, adapter 300, and other connection structures, becoming one of the factors restricting the application of high-rate fast charging technology. The battery pack of this application embodiment can effectively solve the problem of mechanical stress concentration caused by the large expansion of the end of the battery pack 200 under supercharging conditions. By movably connecting the housing 100 along the first direction X through the second mounting part 420, sufficient displacement compensation is provided for the expansion displacement of the individual cells 210 at the end of the battery pack 200, avoiding the structural compression of the output row 220 and the adapter 300, eliminating the alternating stress at the connection position of the output row 220 and the adapter 300 caused by expansion, thereby effectively reducing the difficulty of expansion force control. It can effectively cope with the characteristics of large expansion amount and high expansion rate during the charging and discharging process of high-rate supercharging batteries, reduce the risk of damage to the connection structure, and provide reliable structural protection for the engineering application of high-rate fast charging battery packs.

[0020] refer to Figures 1 to 3 In some embodiments, the battery pack further has a second direction Y and a third direction Z, with the first direction X, the second direction Y, and the third direction Z being mutually perpendicular. The housing 100 includes a base plate, a crossbeam 130, and a frame 140. The crossbeam 130 and the battery pack 200 are connected to the same side of the base plate along the third direction Z. The crossbeam 130 extends along the second direction Y and is located on the side of the battery pack 200 along the first direction X. The frame 140 is located on the side of the battery pack 200 along the second direction Y and is connected to the base plate. The base plate, the crossbeam 130, and the frame 140 form a receiving cavity, the opening of which is opposite to the base plate along the third direction Z. This opening is used to install the battery pack 200 and associated components, facilitating the insertion of the battery pack 200 into the receiving cavity along the third direction Z.

[0021] The mounting base 400 is located on the side of the crossbeam 130 facing away from the base plate along the third direction Z, or on the side of the crossbeam 130 facing away from the battery pack 200 along the first direction X. The second mounting part 420 is movably connected to the crossbeam 130 along the first direction X. On the one hand, this avoids the mounting base 400 occupying the internal space of the receiving cavity, so there is no need to reserve installation space and movement space for the mounting base 400 inside the receiving cavity, which helps to improve the volume occupancy rate of the single battery 210 in the receiving cavity. On the other hand, under the requirement of high energy density, the space between the crossbeam 130 and the battery pack 200 is limited in the first direction X. The mounting base 400 is located on the side of the crossbeam 130 facing away from the battery pack 200 along the third direction Z, or on the side of the crossbeam 130 facing away from the battery pack 200 along the first direction X. This avoids the space limitation between the crossbeam 130 and the battery pack 200, so that it has a larger movement space without affecting the layout of the battery pack 200, thereby meeting the displacement requirements required for greater expansion compensation.

[0022] refer to Figure 2 and Figure 3 In some embodiments, the crossbeam 130 includes a beam body 131 and a connecting portion 132 connected together. The beam body 131 is connected to the base plate and extends along a second direction Y. The beam body 131 is provided with a mounting groove 1311, which has an opening on the side facing away from the base plate along a third direction Z. The mounting groove 1311 provides accommodating space for a connecting seat. The connecting portion 132 is located within the mounting groove 1311 and connected to the beam body 131. The connecting portion 132 provides a connection base for the mounting seat 400. The second mounting portion 420 of the mounting seat 400 is at least partially located within the mounting groove 1311 and is movably connected to the connecting portion 132 along a first direction X. Thus, the connecting part 132 provides a connection base for the second mounting part 420 within the mounting groove 1311. The groove of the mounting groove 1311 facilitates the installation and removal of the second mounting part 420. The second mounting part 420 is at least partially disposed within the mounting groove 1311. The second mounting part 420 can move within the mounting groove 1311, which can effectively save space and make the structure more compact.

[0023] The slot faces away from the base plate along the third direction Z. Therefore, the second mounting part 420 can enter or exit the mounting slot 1311 along the third direction Z through the slot, which facilitates assembly and maintenance. At the same time, it also allows the second mounting part 420 to have a certain displacement space along the third direction Z, which can accommodate the possible movement of the output port 220 and the adapter 300 along the third direction Z. For example, when the battery pack is under vibration, the output port 220 and the adapter 300 will vibrate and displace along the third direction Z due to vibration. The second mounting part 420 will move accordingly along the third direction Z to prevent stress damage to the output port 220, the adapter 300, and the connection with the first mounting part 410.

[0024] refer to Figure 4 and Figure 5 In some embodiments, the mounting groove 1311 has a first groove wall 1312 and a second groove wall 1313 opposite each other along a first direction X. The second groove wall 1313 is located between the battery pack 200 and the first groove wall 1312, so the first groove wall 1312 is further away from the battery pack 200 than the second groove wall 1313. Along the first direction X, there is a movable gap between the second mounting portion 420 and the first groove wall 1312, thereby providing displacement space for the second mounting portion 420 and preventing interference between the second mounting portion 420 and the first groove wall 1312 when the battery pack 200 expands. The second mounting portion 420 can abut against the second groove wall 1313, thus the second mounting portion 420 can be effectively limited in the direction toward the battery pack 200. When the battery pack 200 has not expanded, the second groove wall 1313 can provide installation positioning for the installation of the second mounting part 420 in the first direction X. The second mounting part 420 abuts against the second groove wall 1313 to maintain the preset installation position, thereby accurately positioning the position of the first mounting part 410 in the first direction X, which helps to accurately connect the output row 220 and the adapter 300, and is beneficial to improving assembly efficiency and assembly accuracy.

[0025] When the battery pack 200 expands due to heat, the second mounting part 420 moves away from the battery pack 200 along the first direction X. At this time, the movable gap between the second mounting part 420 and the first groove wall 1312 provides space for the second mounting part 420 to move. The expansion of the battery pack 200 causes the second mounting part 420 to move towards the first groove wall 1312 and away from the second groove wall 1313. At this time, a new movable gap is formed between the second mounting part 420 and the second groove wall 1313. During the process of the battery pack 200 retracting from the expanded state, the second mounting part 420 moves towards the second groove wall 1313 as the battery pack 200 retracts. The new movable gap formed in the expanded state can accommodate the reverse displacement of the second mounting part 420. The second mounting part 420 abuts against the second groove wall 1313 again, thereby ensuring the connection reliability of the output outlet 220, the adapter 300 and the mounting base 400 as a whole during the expansion and contraction of the battery pack 200.

[0026] In some cases, a movable gap may also exist between the second mounting portion 420 and the second tank wall 1313 to provide tolerance capability. When there are dimensional differences between the battery pack 200 and the output port 220, this movable gap can absorb tolerance deviations and ensure a smooth connection between the first mounting portion 410 and the output port 220. Optionally, the crossbeam 130 may also include a buffer member, which can be disposed in the gap between the second mounting portion and the second tank wall 1313. After the second mounting portion 420 is assembled, the buffer member can be disposed in the gap between the second mounting portion 420 and the second tank wall 1313. The buffer member abuts against the second tank wall 1313 and the second mounting portion 420 to provide flexible support for the second mounting portion 420, so as to prevent the second mounting portion 420 from swaying in the first direction X or from rigidly colliding under long-term vibration within the mounting groove 1311.

[0027] In some embodiments, the mounting groove 1311 has a third groove wall 1314 and a fourth groove wall 1315 opposite each other along the second direction Y. Along the second direction Y, one side of the second mounting part 420 abuts against the third groove wall 1314, and the other side abuts against the fourth groove wall 1315. The third groove wall 1314 and the fourth groove wall 1315 can provide mounting positioning for the second mounting part 420 in the second direction Y. The second mounting part 420 abuts against the third groove wall 1314 and the fourth groove wall 1315 to maintain the preset mounting position of the second mounting part 420 in the second direction Y, thereby accurately positioning the position of the first mounting part 410 in the second direction Y, which helps to accurately connect the output row 220 and the adapter 300, thereby improving assembly efficiency and assembly accuracy.

[0028] The second mounting portion 420 of the mounting base 400 can be movably assembled via a snap-fit ​​mechanism. For example, refer to... Figures 3 to 5 In some embodiments, the second mounting portion 420 of the mounting base 400 includes a pair of latches 421 disposed opposite each other along the second direction Y. The latches 421 are connected to the first mounting portion 410. The connecting portion 132 of the crossbeam 130 is provided with a locking hole 1321. The latches 421 are engaged in the locking hole 1321, thereby connecting the second mounting portion 420 and the connecting portion 132, and thus mounting the mounting base 400 onto the crossbeam 130. Alternatively, the second mounting portion 420 may also have a locking hole 1321, and the crossbeam 130 may also include a pair of latches 421 disposed opposite each other along the second direction Y. The latches 421 are connected to the connecting portion 132 and are engaged in the locking hole 1321, thereby connecting the second mounting portion 420 and the connecting portion 132, and thus mounting the mounting base 400 onto the crossbeam 130.

[0029] In this case, along the first direction X, the size of the locking hole 1321 is larger than the size of the buckle 421. The buckle 421 can move along the first direction X in the locking hole 1321, so that the mounting base 400 can move relative to the crossbeam 130 along the first direction X, thereby absorbing displacement deformation during the expansion and contraction of the battery pack 200 and avoiding stress accumulation and structural damage caused by rigid constraints.

[0030] In some embodiments, along the third direction Z, the size of the slot 1321 is larger than the size of the latch 421, allowing the latch 421 to move within the slot 1321 along the third direction Z. Therefore, the second mounting portion 420 can have a certain displacement space along the third direction Z, accommodating possible movements of the output port 220 and the adapter 300 along the third direction Z. For example, when the battery pack is under vibration, the output port 220 and the adapter 300 may experience vibration displacement along the third direction Z due to vibration. The second mounting portion 420 then moves along the third direction Z to prevent stress damage to the output port 220, the adapter 300, and the connection point with the first mounting portion 410.

[0031] In addition to using a snap-fit ​​method to achieve the movable assembly of the second mounting part 420, a slide rail structure can also be used. For example, the second mounting part 420 is provided with a slider, and the connecting member is provided with a slide groove extending along the first direction X. The slider is embedded in the slide groove, allowing the second mounting part 420 to slide along the first direction X. The slide groove can be provided on one side of the connecting member along the second direction Y. Along the second direction Y, the second mounting part 420 is partially located on the side of the connecting member where the slide groove is provided. The side of the second mounting part 420 facing the slide groove is connected to a slider that matches the slide groove. The slider is embedded in the slide groove, and the groove wall along the third direction Z can restrict the slider's displacement along the third direction Z, thereby achieving the connection between the second mounting part 420 and the connecting part 132, and thus mounting the mounting base 400 on the crossbeam 130.

[0032] Along the first direction X, the size of the groove is larger than the size of the slider, allowing the slider to move within the groove along the first direction X. This allows the mounting base 400 to move along the first direction X under conditions of collision or retraction of the battery pack 200, effectively releasing accumulated stress. In some cases, along the third direction Z, the size of the groove can be larger than the size of the slider, giving the slider a certain amount of floating space within the groove along the third direction Z. When the battery pack is under vibration, the output port 220 and the adapter 300 will experience vibration displacement along the third direction Z due to vibration. The second mounting part 420 will then move along the third direction Z to prevent stress damage to the output port 220, the adapter 300, and the connection with the first mounting part 410.

[0033] refer to Figure 4 and Figure 5When the second mounting portion 420 of the mounting base 400 adopts a snap-fit ​​mounting method, the connecting portion 132 may be provided with a snap-fit ​​hole 1321. The second mounting portion 420 may include a limiting portion 422 and a latch 421, which are connected to the side of the first mounting portion 410 facing the base plate. The latch 421 is used for snap-fit ​​mounting with the snap-fit ​​hole 1321.

[0034] There are multiple limiting parts 422. The multiple limiting parts 422 can be distributed around the buckle 421 along the first direction X, or the multiple limiting parts 422 can be distributed around the buckle 421 along the second direction Y, or the multiple limiting parts 422 can be distributed around the buckle 421 along the first direction X and the second direction Y. Furthermore, the limiting parts 422 are connected to the first mounting part 410, and some of the limiting parts 422 can abut against the groove wall of the mounting groove 1311 along the second direction Y to achieve the limiting of the second mounting part 420 in the second direction Y.

[0035] For example, the mounting groove 1311 has a third groove wall 1314 and a fourth groove wall 1315 opposite each other along the second direction Y. Along the second direction Y, the limiting part 422 on one side of the buckle 421 abuts against the third groove wall 1314, and the limiting part 422 on the other side abuts against the fourth groove wall 1315 to maintain the preset mounting position of the second mounting part 420 in the second direction Y, thereby accurately positioning the position of the first mounting part 410 in the second direction Y, which helps to accurately connect the output row 220 and the adapter 300, and thus helps to improve assembly efficiency and assembly accuracy.

[0036] A portion of the limiting part 422 can be spaced apart from the groove wall of the mounting groove 1311 along the first direction X, providing reserved space for the movement of the second mounting part 420 in the first direction X. For example, the mounting groove 1311 has a first groove wall 1312 and a second groove wall 1313 opposite each other along the first direction X. The second groove wall 1313 is located between the battery pack 200 and the first groove wall 1312. Therefore, the first groove wall 1312 is farther away from the battery pack 200 than the second groove wall 1313. Along the first direction X, there is an movable gap between the limiting part 422 and the first groove wall 1312, thereby providing displacement space for the second mounting part 420 and preventing interference between the limiting part 422 and the first groove wall 1312 when the battery pack 200 expands. A portion of the limiting part 422 can abut against the second groove wall 1313, so the second mounting part 420 can be effectively limited in the direction toward the battery pack 200. When the battery pack 200 has not expanded, the second groove wall 1313 can provide installation positioning for the installation of the second mounting part 420 in the first direction X. The second mounting part 420 abuts against the second groove wall 1313 to maintain the preset installation position, thereby accurately positioning the position of the first mounting part 410 in the first direction X, which helps to accurately connect the output row 220 and the adapter 300, and is beneficial to improving assembly efficiency and assembly accuracy.

[0037] It is understandable that the buckle 421 is surrounded by the aforementioned limiting part 422, which performs the main limiting function. Therefore, the size of the buckle 421 can be reduced while meeting installation requirements, thereby reducing the amount of material used in the second mounting part 420, which is beneficial for reducing weight and saving materials.

[0038] In some possible implementations, the second mounting part 420 may not have a limiting part 422, but instead uses a snap fastener 421 to limit or reserve a clearance with the wall of the mounting groove 1311. This method simplifies the structure of the second mounting part 420 and reduces the complexity of the manufacturing mold. For example, the snap fastener 421 abuts against the second groove wall 1313 on the side facing the second groove wall 1313 along the first direction X, and a clearance is reserved between the snap fastener 421 and the first groove wall 1312 on the side away from the second groove wall 1313 along the first direction X to accommodate the deformation requirements when the battery pack 200 expands; at the same time, the snap fastener 421 cooperates with the third groove wall 1314 and the fourth groove wall 1315 on both sides along the second direction Y to limit and restrict the mounting, ensuring installation stability. To meet structural strength requirements, the snap fastener 421 can be made with a larger volume, for example, having sufficient dimensions along the first direction X and the second direction Y to ensure reliability when limiting and abutting.

[0039] refer to Figure 3 and Figure 6 In some embodiments, the battery pack also includes a protective member 500, which is disposed between the crossbeam 130 and the second mounting portion 420, covering the area where the surface of the crossbeam 130 contacts the second mounting portion 420, thereby isolating and protecting the two during the movement of the second mounting portion 420 relative to the crossbeam 130 to avoid frictional damage.

[0040] The protective component 500 can be an insulating component or layer with insulating properties, such as a plastic component or an insulating coating, to achieve electrical isolation at the contact point between the crossbeam 130 and the second mounting part 420, thus avoiding the risk of short circuits caused by direct contact and friction between the surfaces of the second mounting part 420 and the crossbeam 130. Alternatively, the protective component 500 can also be a wear-resistant component or layer with wear-resistant properties, such as a wear-resistant plastic layer or a wear-resistant coating, which can effectively reduce wear on the crossbeam 130 and the second mounting part 420. Alternatively, the protective component 500 can also be an insulating and wear-resistant layer with both insulating and wear-resistant properties, such as an insulating ceramic layer, to achieve electrical isolation and mechanical protection at the contact point between the crossbeam 130 and the second mounting part 420.

[0041] In this embodiment, the first mounting portion 410 and the second mounting portion 420 of the mounting base 400 are connected to achieve overall synchronous movement. The output row 220 and the adapter 300 are both connected to the first mounting portion 410, and the first mounting portion 410 moves synchronously with the second mounting portion 420 along the first direction X. This ensures that the output row 220, the adapter 300 and the first mounting portion 410 maintain their relative positions during the expansion of the battery pack 200.

[0042] The output bar 220 and the adapter 300 can be connected to the first mounting part 410 via fasteners 430, or they can be connected by welding or riveting. The first mounting part 410 is provided with mounting holes 411, one end of the output bar 220 is provided with a first connecting hole 221, and one end of the adapter 300 is provided with a second connecting hole 310. The first connecting hole 221, the second connecting hole 310, and the mounting hole 411 correspond one-to-one. The mounting base 400 may also include multiple fasteners 430. The fastener 430 includes a rod and an end 431. The rod of the fastener 430 passes through a first connecting hole 221, a second connecting hole 310, and a mounting hole 411, and is connected to the first mounting part 410. The end 431 of the fastener 430 locks the output bar 220 and the adapter 300 to the first mounting part 410. A reliable connection is achieved by fastener 430 passing through the corresponding holes of the first connecting hole 221, the second connecting hole 310, and the mounting hole 411.

[0043] refer to Figure 3 , Figure 5 and Figure 7 In some embodiments, the first mounting portion 410 is provided with a plurality of mounting holes 411, one end of the output row 220 is provided with a plurality of first connecting holes 221, and one end of the adapter 300 is provided with a plurality of second connecting holes 310. The first connecting holes 221, second connecting holes 310, and mounting holes 411 correspond one-to-one. The mounting base 400 may also include a plurality of fasteners 430. Each fastener 430 includes a rod and an end 431. The rod of each fastener 430 passes through a first connecting hole 221, a second connecting hole 310, and a mounting hole 411, and is connected to the first mounting portion 410. The end 431 of the fastener 430 locks the output row 220 and the adapter 300 to the first mounting portion 410. A reliable connection is achieved by the fasteners 430 passing through the corresponding holes of the first connecting holes 221, second connecting holes 310, and mounting holes 411, ensuring a stable and reliable current conduction path between the output row 220 and the adapter 300. Using multiple mounting holes 411, first connecting hole 221 and second connecting hole 310 can effectively disperse stress, improve connection rigidity, and prevent the output pin 220 and adapter 300 from rotating around the axis of the hole, thereby ensuring the stability of current transmission.

[0044] The shank of the fastener 430 and the mounting hole 411 can be threaded or interference-fitted, and the end 431 of the fastener 430 can be a hexagonal head, internal hexagonal head, or flange structure to adapt to different assembly spaces and operating torque requirements.

[0045] In some embodiments, the fastener 430 can be made of a conductive material, enabling it to participate in current conduction while achieving a mechanical connection. Multiple mounting holes 411, first connecting holes 221, and second connecting holes 310 are used and connected one-to-one by multiple fasteners 430, which not only strengthens the overall structural integrity but also allows current to be transmitted in parallel along multiple paths, effectively improving current carrying capacity.

[0046] In some possible implementations, the first mounting part 410 and the second mounting part 420 can be a separate structure, for example, they can be manufactured separately and then connected by common assembly methods such as bolt connection, snap-fit ​​or welding; or, the first mounting part 410 and the second mounting part 420 of the mounting base 400 can also be an integral structure, for example, the first mounting part 410 and the second mounting part 420 can be integrally manufactured by injection molding process.

[0047] Compared to a split structure, the integrated structure eliminates the need for assembling and connecting the first mounting part 410 and the second mounting part 420 in the mounting base 400 itself, and also results in a more stable structure. By making the first mounting part 410 and the second mounting part 420 into an integrated structure for use in the battery pack of this embodiment, the installation requirements of the mounting base 400 can be met simply by connecting the second mounting part 420 to the housing 100. This not only facilitates installation but also effectively improves the long-term reliability of the mounting base 400 under repeated expansion and contraction of the battery pack 200.

[0048] For example, the mounting base 400 may be made of an insulating material, such as engineering plastic or composite ceramic substrate, to ensure insulation between the output port 220, the adapter 300 and the housing 100. Alternatively, the mounting base 400 may also be made of a metal material and covered with an insulating layer on its outer surface, taking into account the requirements of structural strength, heat resistance and electrical isolation.

[0049] refer to Figure 8 In some embodiments, the adapter 300 can be supported on the housing 100. The housing 100 can be provided with a support structure for supporting the adapter 300, so as to avoid the adapter 300 exerting additional force on the output row 220 and the position connected to the output row 220 due to gravity, reduce stress concentration at the connection between the adapter 300 and the output row 220 under vibration conditions, thereby improving the connection reliability.

[0050] For example, refer to Figure 1 and Figure 8The housing 100 includes a base plate, a crossbeam 130, and a frame 140. The crossbeam 130 and the battery pack 200 are connected to the same side of the base plate along the third direction Z. The crossbeam 130 is located on one side of the battery pack 200 along the first direction X. The frame 140 is located on the side of the battery pack 200 along the second direction Y and is connected to the base plate. The base plate, crossbeam 130, and frame 140 form an open receiving cavity, the opening of which is opposite to the base plate along the third direction Z, allowing the battery pack 200 to enter and exit the receiving cavity through the opening. The crossbeam 130 and the adapter 300 are located on one side of the battery pack 200 along the first direction X. The crossbeam 130 supports the adapter 300 and shares its weight.

[0051] Among them, reference Figure 8 and Figure 9 The crossbeam 130 includes a beam body 131 and a support platform 133 connected together. The beam body 131 extends along a second direction Y. The support platform 133 is located on the side of the beam body 131 away from the bottom plate along a third direction Z, and protrudes relative to the beam body 131 towards the side away from the bottom plate. Along the third direction Z, the adapter 300 is located on the side of the support platform 133 away from the beam body 131. The support platform 133 is supported by the adapter 300. The adapter 300 is stably supported by the support platform 133, which avoids the adapter 300 exerting additional force on the output row 220 and the connection position with the output row 220 due to gravity, reduces stress concentration at the connection between the adapter 300 and the output row 220 under vibration conditions, and thus improves the connection reliability of the adapter 300.

[0052] refer to Figure 8 and Figure 9 In some embodiments, the battery pack may also include a buffer pad 600 located between the support platform 133 and the adapter 300 to prevent the adapter 300 and the support platform 133 from being squeezed, collided or worn.

[0053] The buffer pad 600 can be attached to either the surface of the support platform 133 facing the adapter 300 or the surface of the adapter 300 facing the support platform 133. The buffer pad 600 can be made of an elastic material, such as rubber or silicone, which has good cushioning performance and shock absorption effect. When the battery pack is subjected to vibration or impact, the buffer pad 600 can absorb some energy, reducing the vibration and impact force transmitted to the adapter 300, thereby further protecting the connection between the adapter 300 and the output port 220 and preventing damage caused by stress concentration. The buffer pad 600 also provides a certain degree of insulation, preventing electrical conduction between the adapter 300 and the crossbeam 130, thus improving electrical safety.

[0054] refer to Figure 2The battery pack 200 also includes a first busbar 230. The battery pack 200 comprises multiple individual cells 210, including multiple first individual cells 210a and multiple second individual cells 210b. Along a first direction X, the multiple second individual cells 210b are spaced apart and arranged between the multiple first individual cells 210a. Therefore, at least two first individual cells 210a are located at opposite ends of the battery array formed by the multiple second individual cells 210b. The first busbar 230 is located on one side of the first individual cell 210a along a third direction Z, thereby connecting the first individual cell 210a and the adjacent second individual cell 210b.

[0055] The battery pack 200 also includes a plurality of second busbars 240. The plurality of second busbars 240 are disposed on one side of the plurality of second individual cells 210b along the third direction Z and arranged in the first direction X. Two adjacent second individual cells 210b along the first direction X are electrically connected through the second busbars 240, thereby realizing the electrical connection between the plurality of second individual cells 210b inside the battery pack 200.

[0056] It is understood that the first single cell 210a and the second single cell 210b each have two terminals 211 spaced apart along the second direction Y. The first bus 230 connects one terminal 211 of the first single cell 210a and the corresponding terminal 211 of the adjacent second single cell 210b. The output bus 220 is connected to the other terminal 211 of the first single cell 210a. The first bus 230 connects the first single cell 210a at one end to the adjacent second single cell 210b, and the output bus 220 connects to the first single cell 210a, realizing energy interaction between the battery pack 200 and the external circuit. The first bus 230 and the output bus 220 are spaced apart along the second direction Y to avoid interference.

[0057] When the battery pack 200 expands, the cumulative expansion of multiple second individual cells 210b along the first direction X results in the most significant expansion displacement of the first individual cell 210a located at the end, causing displacement of the output row 220 connected to it. The output row 220 pushes the mounting base 400 and the adapter 300 to move along the first direction X away from the battery pack 200, preventing the output row 220 and the adapter 300 from being deformed by force or the connection point from being squeezed, which could lead to connection failure.

[0058] In the battery pack, the connection structure at the end of the battery pack 200 that is susceptible to expansion force also includes the first busbar 230. Since the expansion displacement of the first single cell 210a located at the end of the battery pack 200 is the most obvious, the spacing between the second single cell 210b adjacent to the first single cell 210a changes the most, which can easily lead to a sharp increase in local stress in the first busbar 230.

[0059] refer to Figure 10 In some embodiments of this application, the first busbar 230 includes a first layer 231 and a second layer 232 connected to each other. The first layer 231 and the second layer 232 are stacked along the third direction Z. A portion of the first layer 231 and the second layer 232 are electrically connected to the first single cell 210a, and another portion of the first layer 231 and the second layer 232 are electrically connected to the second single cell 210b adjacent to the first single cell 210a along the first direction X. Compared with the single-layer structure, the multi-layer structure is more likely to deform and absorb energy when subjected to force, thereby more effectively dispersing expansion stress and reducing the risk of local stress concentration at the connection between the first busbar 230 and the single cell 210, thereby improving the stability of the end connection structure of the battery pack 200.

[0060] In some embodiments, to enhance the energy absorption capacity of the first busbar 230, both the first layer 231 and the second layer 232 are provided with bent portions 233. The bent portions 233 are located between two individual cells 210. The bent portions 233 of the first layer 231 and the second layer 232 are stacked along the third direction Z. Therefore, when the first layer 231 and the second layer 232 are subjected to tensile or compressive forces, elastic deformation can occur at the bent portions 233, absorbing and buffering the axial displacement caused by battery expansion. The shape of the bent portions 233 is not limited to arc, wave, V-shape or N-shape, and can be flexibly adapted according to actual working conditions.

[0061] In some embodiments, along the third direction Z, the dimensions of the first layer 231 and the second layer 232 are smaller than the dimensions of the second busbar 240, that is, the thicknesses of the first layer 231 and the second layer 232 are thinner than the second busbar 240, making it easier to deform and absorb energy. This allows for better adaptation to the expansion displacement characteristics at the end of the first cell 210a and the second cell 210b, ensuring a continuous and reliable electrical connection.

[0062] In some embodiments, along the third direction Z, the sum of the dimensions of the first layer 231 and the second layer 232 is less than or equal to the dimension of the second busbar 240. That is, the combined thickness of the first layer 231 and the second layer 232 is less than or equal to the thickness of the second busbar 240, thereby significantly improving the deformation energy absorption capacity while ensuring conductivity, better adapting to the expansion displacement characteristics at this location, and ensuring continuous and reliable electrical connection.

[0063] refer to Figure 1 and Figure 2In some embodiments, the housing 100 includes a base plate, a frame 140, and a longitudinal beam 150. The longitudinal beam 150 and the battery pack 200 are connected to the same side of the base plate along a third direction Z. The longitudinal beam 150 extends along a first direction X and is located on the side of the battery pack 200 along a second direction Y. The frame 140 and the longitudinal beam 150 are spaced apart along the second direction Y. Multiple battery packs 200 are arranged between the longitudinal beam 150 and the frame 140. It can be understood that the battery pack 200 forms a concentrated area of ​​expansion stress between its end in the first direction X and the longitudinal beam 150. In this area, the expansion force generated by the battery expansion along the first direction X, together with the constraint of the longitudinal beam 150 and the frame 140 on the battery pack 200 along the second direction Y, creates a multi-directional superposition of forces near the first single cell 210a at the end, resulting in a complex stress distribution and easy concentration at this location.

[0064] To alleviate this problem, at least one first busbar 230 is disposed adjacent to the first single cell 210a located at the end of the longitudinal beam 150 along the second direction Y. When the longitudinal beam 150 has multiple battery packs 200 on one side along the second direction Y, the first busbar 230 connected to the first single cell 210a on the battery pack 200 adjacent to the longitudinal beam 150 is disposed adjacent to the longitudinal beam 150. When two longitudinal beams 150 are spaced apart and there are multiple battery packs 200 between the two longitudinal beams 150, the first busbar 230 connected to the first single cell 210a on the two adjacent battery packs 200 of the two longitudinal beams 150 is disposed adjacent to the corresponding longitudinal beam 150. That is, the first busbar 230 is connected to the terminal post 211 on the first single cell 210a adjacent to the longitudinal beam 150. At least one first busbar 230 is disposed adjacent to the frame 140 along the second direction Y, that is, the first busbar 230 is connected to the terminal post 211 adjacent to the frame 140 on the first single cell 210a. The first busbar 230 can adopt at least one of the aforementioned stacking scheme, thickness scheme, and bending energy absorption scheme, which can effectively cope with the complex stress conditions at this position. Thus, the energy absorption effect of the first busbar 230 can effectively disperse multi-directional stress, reduce the local strain at the connection point of the terminal post 211 adjacent to the end of the battery pack 200 and the longitudinal beam 150 and the frame 140, and thus improve the stability and reliability of the connection structure near the end of the battery pack 200.

[0065] In some cases, battery packs 200 are respectively provided on both sides of the longitudinal beam 150 along the second direction Y. In this case, the first busbar 230 is arranged adjacent to both sides of the longitudinal beam 150 along the second direction Y. That is, the first busbar 230 on the first single cell 210a on both sides of the longitudinal beam 150 is connected to the terminal post 211 on the first single cell 210a adjacent to the longitudinal beam 150. Thus, the energy absorption effect of the first busbar 230 can effectively disperse multi-directional stress and reduce the local strain at the connection point of the terminal post 211 at the end of the battery pack 200 adjacent to the longitudinal beam 150. The first busbar 230 can adopt at least one of the aforementioned stacked scheme, thickness scheme, and bending energy absorption scheme, which can effectively cope with the complex stress conditions at this location. Thus, the energy absorption effect of the first busbar 230 can effectively disperse multi-directional stress, reduce the local strain at the connection point of the pole post 211 at the end of the battery pack 200 adjacent to the longitudinal beam 150 and the frame 140, and thereby improve the stability and reliability of the connection structure near the end of the battery pack 200.

[0066] The electrical device in this application includes the battery pack of any of the foregoing embodiments, and the battery pack supplies electrical energy to the electrical device. The electrical device can be an electric vehicle, a hybrid electric vehicle, an electric ship, or an energy storage cabinet, energy storage station, etc. Because the output pins, adapters, and mounting bases in the battery pack have a certain amount of mobility along the first direction X on one side of the battery pack, rigid compression between these structures is effectively avoided, allowing expansion stress to be effectively released, ensuring the stability of the electrical connection, thereby improving the safety and service life of the battery pack, and thus effectively improving the reliability and stability of the electrical device operation.

[0067] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A battery pack having a first orientation (X), characterized in that, include: The housing (100) has an open receiving cavity; A battery pack (200) is disposed in the receiving cavity. The battery pack (200) includes a plurality of individual cells (210) and an output bar (220). The plurality of individual cells (210) are arranged along a first direction (X). The individual cells (210) arranged at the ends along the first direction (X) are connected to the output bar (220). An adapter (300) is located on one side of the battery pack (200) along the first direction (X), and the adapter (300) is electrically connected to the output bar (220); Mounting base (400) is located on one side of the battery pack (200) along the first direction (X). The mounting base (400) includes a first mounting part (410) and a second mounting part (420) connected to each other. The adapter (300) and the output bar (220) are both connected to the first mounting part (410). The second mounting part (420) is movably connected to the housing (100) along the first direction (X).

2. The battery pack according to claim 1, characterized in that, The battery pack also has a second direction and a third direction, wherein the first direction (X), the second direction (Y), and the third direction (Z) are mutually perpendicular; The housing (100) includes a base plate (120), a crossbeam (130), and a frame (140). The crossbeam (130) and the battery pack (200) are connected to the base plate (120) on the same side along the third direction (Z). The crossbeam (130) is located on one side of the battery pack (200) along the first direction (X) and extends along the second direction (Y). The frame (140) is located on the side of the battery pack (200) along the second direction (Y) and is connected to the base plate (120). The base plate (120), the crossbeam (130), and the frame (140) form the receiving cavity. The opening is opposite to the base plate (120) along the third direction (Z). The mounting base (400) is located on the side of the crossbeam (130) facing away from the base plate (120) along the third direction (Z), or the mounting base (400) is located on the side of the crossbeam (130) facing away from the battery pack (200) along the first direction (X), and the second mounting part (420) is movably connected to the crossbeam (130) along the first direction (X).

3. The battery pack according to claim 2, characterized in that, The crossbeam (130) includes a beam body (131) and a connecting part (132) connected to each other. The beam body (131) is connected to the base plate (120) and extends along the second direction (Y). The beam body (131) is provided with a mounting groove (1311). The mounting groove (1311) has a slot on the side facing away from the base plate (120) along the third direction (Z). The connecting part (132) is located in the mounting groove (1311) and connected to the beam body (131). The second mounting part (420) is at least partially located within the mounting groove (1311), and the second mounting part (420) is movably connected to the connecting part (132) along the first direction (X).

4. The battery pack according to claim 3, characterized in that, The mounting slot (1311) has a first slot wall (1312) and a second slot wall (1313) opposite each other along the first direction (X). The second slot wall (1313) is located between the battery pack (200) and the first slot wall (1312). Along the first direction (X), there is a movable gap between the second mounting part (420) and the first slot wall (1312), and there is a movable gap between the second mounting part (420) and the second slot wall (1313). Alternatively, the second mounting part (420) abuts against the second slot wall (1313). And / or, the mounting groove (1311) has a third groove wall (1314) and a fourth groove wall (1315) opposite each other along the second direction (Y), along the second direction (Y), one side of the second mounting part (420) abuts against the third groove wall (1314) and the other side abuts against the fourth groove wall (1315).

5. The battery pack according to claim 3, characterized in that, The second mounting portion (420) includes a pair of latches (421) arranged opposite each other along the second direction (Y), the latches (421) being connected to the first mounting portion (410), and the connecting portion (132) having a locking hole (1321); or, the second mounting portion (420) having a locking hole (1321), and the crossbeam (130) further includes a pair of latches (421) arranged opposite each other along the second direction (Y), the latches (421) being connected to the connecting portion (132); wherein: The buckle (421) is engaged in the hole (1321) along the first direction (X). The size of the hole (1321) is larger than the size of the buckle (421), and the buckle (421) can move in the hole (1321) along the first direction (X).

6. The battery pack according to claim 5, characterized in that, Along the third direction (Z), the size of the card hole (1321) is larger than the size of the buckle (421), and the buckle (421) is able to move in the card hole (1321) along the third direction (Z).

7. The battery pack according to claim 5, characterized in that, The connecting part (132) is provided with the locking hole (1321), and the second mounting part (420) includes a limiting part (422) and the buckle (421). The buckle (421) and the limiting part (422) are connected to the side of the first mounting part (410) facing the base plate (120). There are multiple limiting parts (422), and multiple limiting parts (422) are distributed around the buckle (421) along at least one of the first direction (X) and the second direction (Y), and are connected to the first mounting part (410). Wherein: The mounting groove (1311) has a first groove wall (1312) and a second groove wall (1313) opposite each other along the first direction (X), the second groove wall (1313) being located between the battery pack (200) and the first groove wall (1312), and there is a movable gap between the limiting part (422) and the first groove wall (1312) along the first direction (X); And / or, the mounting groove (1311) has a third groove wall (1314) and a fourth groove wall (1315) opposite each other along the second direction (Y), along the second direction (Y), the limiting part (422) on one side of the buckle (421) abuts against the third groove wall (1314), and the limiting part (422) on the other side abuts against the fourth groove wall (1315).

8. The battery pack according to claim 2, characterized in that, The battery pack also includes a protective element (500) disposed between the crossbeam (130) and the second mounting portion (420).

9. The battery pack according to claim 1, characterized in that, The first mounting part (410) is provided with a plurality of mounting holes (411), one end of the output bar (220) is provided with a plurality of first connecting holes (221), and one end of the adapter (300) is provided with a plurality of second connecting holes (310). The first connecting holes (221), the second connecting holes (310) and the mounting holes (411) correspond one to one. The mounting base (400) also includes a plurality of fasteners (430), each fastener (430) having a rod portion and an end portion (431). The rod portion of each fastener (430) passes through a first connecting hole (221), a second connecting hole (310), and a mounting hole (411) and is connected to the first mounting portion (410). The end portion (431) locks the output bar (220) and the adapter (300) to the first mounting portion (410).

10. The battery pack according to claim 1, characterized in that, The battery pack also has a second direction (Y) and a third direction (Z), wherein the first direction (X), the second direction (Y), and the third direction (Z) are mutually perpendicular; The housing (100) includes a base plate (120), a crossbeam (130), and a frame (140). The crossbeam (130) and the battery pack (200) are connected to the base plate (120) on the same side along the third direction (Z). The crossbeam (130) is located on one side of the battery pack (200) along the first direction (X). The frame (140) is located on the side of the battery pack (200) along the second direction (Y) and connected to the base plate (120). The base plate (120), the crossbeam (130), and the frame (140) are connected to the base plate (120). The 130 and the frame (140) enclose the receiving cavity, the opening being opposite the base plate (120) along the third direction (Z); the crossbeam (130) includes a connected beam body (131) and a support platform (133), the beam body (131) extending along the second direction (Y), the support platform (133) being located on the side of the beam body (131) away from the base plate (120) along the third direction (Z), and protruding relative to the beam body (131) toward the side away from the base plate (120); Along the third direction (Z), the adapter (300) is located on the side of the support platform (133) away from the beam (131), and the support platform (133) is supported by the adapter (300).

11. The battery pack according to claim 10, characterized in that, The battery pack also includes a buffer pad (600) located between the support platform (133) and the adapter (300).

12. The battery pack according to claim 1, characterized in that, The battery pack also has a second direction (Y) and a third direction (Z), wherein the first direction (X), the second direction (Y), and the third direction (Z) are mutually perpendicular; The battery pack (200) further includes a first busbar (230). Among the multiple individual cells (210) of the battery pack (200), there are two first individual cells (210a) and multiple second individual cells (210b). Along the first direction (X): the multiple second individual cells (210b) are spaced apart and arranged between the two first individual cells (210a); the first busbar (230) is located on one side of the first individual cell (210a) along the third direction (Z), and the first busbar (230) and the output busbar (220) are spaced apart along the second direction (Y). The first busbar (230) includes a first layer (231) and a second layer (232) connected to each other. The first layer (231) and the second layer (232) are stacked along the third direction (Z). A portion of the first layer (231) and the second layer (232) are electrically connected to the first single cell (210a). Another portion of the first layer (231) and the second layer (232) are electrically connected to the second single cell (210b) which is adjacent to the first single cell (210a) along the first direction (X).

13. The battery pack according to claim 12, characterized in that, Both the first layer (231) and the second layer (232) are provided with a bending portion (233), the bending portion (233) is located between two individual cells (210), and the bending portions (233) of the first layer (231) and the second layer (232) are stacked along the third direction (Z).

14. The battery pack according to claim 12, characterized in that, The battery pack (200) further includes a plurality of second busbars (240), which are disposed on one side of the plurality of second individual cells (210b) along the third direction (Z) and arranged in the first direction (X). Two adjacent second individual cells (210b) along the first direction (X) are electrically connected through the second busbars (240). Along the third direction (Z), the size of the first layer (231) and the size of the second layer (232) are smaller than the size of the second busbars (240). And / or, along the third direction (Z), the sum of the dimensions of the first layer (231) and the second layer (232) is less than or equal to the dimension of the second busbar (240).

15. The battery pack according to claim 12, characterized in that, The battery pack also has a second direction (Y), which is perpendicular to the first direction (X) and the third direction (Z); the housing (100) includes a base plate (120), a frame (140), and a longitudinal beam (150), the longitudinal beam (150) and the battery pack (200) being connected on the same side of the base plate (120) along the third direction (Z), the longitudinal beam (150) extending along the first direction (X) and located on one side of the battery pack (200) along the second direction (Y), the frame (140) and the longitudinal beam (150) being spaced apart along the second direction (Y); wherein: Multiple sets of battery packs (200) are provided between the longitudinal beam (150) and the frame (140), at least one first busbar (230) is arranged adjacent to the longitudinal beam (150) along the second direction (Y), and at least one first busbar (230) is arranged adjacent to the frame (140) along the second direction (Y); And / or, the battery pack (200) is provided on both sides of the longitudinal beam (150) along the second direction (Y), and the first busbar (230) is arranged adjacent to both sides of the longitudinal beam (150) along the second direction (Y).

16. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 15.

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