Battery pack and vehicle

Abstract

The application discloses a battery pack and a vehicle. The battery pack comprises a bottom plate, a frame, a frame, a battery pack and a distribution box assembly, the frame is arranged around the outer periphery of the bottom plate and defines a battery cell accommodating cavity with the bottom plate, and an electric connection terminal is arranged on the frame; a partition beam is arranged on the bottom plate and located in the battery cell accommodating cavity, the partition beam is configured to extend in a first direction and is spaced apart in a second direction to define a first cavity and a second cavity; the battery pack is accommodated in the first cavity and is configured to be arranged in multiple groups in sequence in the first direction; and the distribution box assembly is arranged in the second cavity, and the distribution box assembly is electrically connected with the multiple groups of battery packs and the electric connection terminal. According to the battery pack, a longitudinal beam is not arranged, the light weight is realized, the internal space of the battery pack is saved, and the energy density and the compactness of the structure of the battery pack are improved.

Description

Technical Field

[0001] This invention relates to the field of batteries, and more particularly to a battery pack and a vehicle. Background Technology

[0002] In existing technologies, longitudinal beams are used in battery packs to support and fix the battery cells. This beam structure increases the weight of the battery pack and occupies internal space, hindering lightweight design and energy density improvement. Furthermore, the cell assembly process is relatively complex. Meanwhile, heat exchange plates with multiple cooling zones, each containing independent cooling channels, are used in the battery pack to achieve heat exchange between the water-cooled plate and the battery pack, ensuring normal operation. However, this arrangement cannot achieve uniform heat exchange across all heat exchange zones of the water-cooled plate, reducing the overall heat exchange efficiency. Moreover, excessively strong or weak localized heat exchange in the water-cooled plate can lead to thermal runaway and other safety incidents within the battery pack. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a battery pack. According to the invention, the battery pack has a partition beam in the cell housing cavity separating a first cavity for assembling the cells and a second cavity for assembling the power distribution box assembly. This eliminates the need for longitudinal beams, achieving weight reduction, saving internal space, and improving the energy density and structural compactness of the battery pack.

[0004] The present invention also proposes a vehicle having the above-described battery pack.

[0005] The battery pack according to the present invention includes a base plate, a frame, a battery pack, and a power distribution box assembly. The frame is disposed around the outer periphery of the base plate and defines a cell receiving cavity with the base plate. An electrical connection terminal is disposed on the frame. A partition beam is disposed on the base plate and located within the cell receiving cavity. The partition beam is configured as a plurality of beams extending in a first direction and spaced apart in a second direction to define a first cavity and a second cavity. The battery pack is housed within the first cavity and is configured as a plurality of groups arranged sequentially in a first direction. Each battery pack is provided with a plurality of individual cells, which extend in a second direction and are arranged sequentially along the first direction. And / or the plurality of individual cells extend in the first direction and are arranged sequentially along the second direction. A power distribution box assembly is disposed in the second cavity and is electrically connected to the plurality of battery packs and to the electrical connection terminal.

[0006] The battery pack according to the present invention defines a first cavity and a second cavity within the cell housing cavity by providing a partition beam. Multiple battery packs can be installed in the first cavity, and each battery pack is fixed to a base plate, the partition beam, and a frame. No longitudinal beams are needed to support and fix the battery packs, saving internal space and reducing weight. Furthermore, more battery packs can be installed in the battery pack, increasing its energy density. A power distribution box assembly is assembled in the second cavity and connected to the multiple battery packs, improving the compactness of the battery pack.

[0007] According to one embodiment of the present invention, the base plate is provided with a heat exchange zone, the partition beam is disposed within the heat exchange zone or located at the edge of the heat exchange zone, the base plate is provided with a cooling flow channel within the heat exchange zone, and the base plate is adapted to exchange heat with the battery pack.

[0008] According to one embodiment of the present invention, the battery pack is configured as a plurality of cells arranged sequentially in a first direction, and each battery pack is provided with a plurality of individual cells arranged sequentially in a second direction; the base plate is provided with a water inlet and a water outlet, and the cooling channel includes an inlet flow path connected to the water inlet and an outlet flow path connected to the water outlet; the heat exchange zone is configured as a plurality of cells, and each heat exchange zone corresponds to a plurality of battery packs, and the base plate forms a plurality of branch flow paths corresponding to the battery packs in the heat exchange zone, the upstream end of the branch flow path is connected to the inlet flow path, and the downstream end of the branch flow path is connected to the outlet flow path.

[0009] According to one embodiment of the present invention, in one heat exchange zone, a plurality of branch flow paths extend along a first direction and are spaced apart in a second direction, the heat exchange medium in at least one of the branch flow paths flows along the first flow direction, and the heat exchange medium in at least another branch flow path flows along the second flow direction, the first flow direction being opposite to the second flow direction.

[0010] According to one embodiment of the present invention, the plurality of branch flow paths include: a first branch flow path, a second branch flow path, and a third branch flow path, wherein the first branch flow path and the second branch flow path are respectively disposed on both sides of the heat exchange zone in a first direction; the third branch flow path is configured to be a plurality of interconnected, and the plurality of third branch flow paths are disposed between the first branch flow path and the second branch flow path, wherein the first branch flow path and the second branch flow path are connected through the plurality of third branch flow paths; wherein, in at least one heat exchange zone, the first branch flow path is connected to the inlet flow path, the second branch flow path is connected to the outlet flow path, and / or the first branch flow path and the second branch flow path of at least one heat exchange zone are respectively connected to the inlet flow path, and at least one third branch flow path is connected to the outlet flow path.

[0011] According to one embodiment of the present invention, the plurality of heat exchange zones include a first heat exchange zone, a second heat exchange zone, a third heat exchange zone, and a fourth heat exchange zone. The first heat exchange zone and the second heat exchange zone are spaced apart in a first direction, the first heat exchange zone and the third heat exchange zone are spaced apart in a second direction, and the fourth heat exchange zone and the second heat exchange zone are spaced apart in a second direction. The water inlet is disposed in the first heat exchange zone, and the water outlet is disposed in the third heat exchange zone.

[0012] According to one embodiment of the present invention, the water inlet flow path includes a first water inlet flow path, a second water inlet flow path, and a third water inlet flow path. One end of the first water inlet flow path is connected to the water inlet, and at least a portion of the first water inlet flow path is disposed on the outer periphery of the first heat exchange zone. The other end of the first water inlet flow path is connected to the first branch flow path and the second branch flow path of the second heat exchange zone. One end of the second water inlet flow path is connected to the water inlet, and the other end of the second water inlet flow path is connected to the first branch flow path and the second branch flow path of the first heat exchange zone. One end of the third water inlet flow path is connected to the water inlet, and the other end of the third water inlet flow path is connected to the first branch flow path and at least one of the third branch flow paths of the fourth heat exchange zone.

[0013] According to one embodiment of the present invention, the water outlet path includes a first water outlet path, a second water outlet path, a third water outlet path, and a fourth water outlet path. One end of the first water outlet path is connected to at least one of the third branch paths of the second heat exchange zone, and the other end of the first water outlet path flows sequentially through the outer periphery of the fourth heat exchange zone and the third heat exchange zone and is connected to the water outlet. One end of the second water outlet path is connected to at least one of the third branch paths of the first heat exchange zone, and the other end of the second water outlet path flows sequentially through the outer periphery of the second heat exchange zone and the fourth heat exchange zone and is connected to the first water outlet path. One end of the third water outlet path is connected to at least one of the third branch paths of the third heat exchange zone, and the other end of the third water outlet path flows sequentially through the outer periphery of the third heat exchange zone and is connected to the water outlet. One end of the fourth water outlet path is connected to the second branch path and at least one of the third branch paths of the fourth heat exchange zone, and the other end of the fourth water outlet path flows sequentially through the outer periphery of the fourth heat exchange zone and the outer periphery of the third heat exchange zone and is connected to the water outlet.

[0014] According to one embodiment of the present invention, the two ends of the partition beam extend to be connected to the frame, and the surfaces of two adjacent partition beams facing each other are respectively formed with a first limiting surface and a second limiting surface, the first limiting surface and the second limiting surface being arranged facing each other in a second direction; wherein, the two ends of the plurality of battery packs respectively abut against the first limiting surface and the second limiting surface, and two adjacent battery packs are spaced apart in the first direction.

[0015] According to one embodiment of the present invention, the battery pack includes a first cell and a second cell, wherein the first cell is configured to be a plurality of cells arranged sequentially in a second direction; the second cell is configured to be a plurality of cells arranged sequentially in a second direction, and any one of the first cell and the second cell is correspondingly arranged in the first direction.

[0016] According to one embodiment of the present invention, the battery pack further includes end plates disposed at both ends of the battery pack. The end plates have a support surface and a mating surface formed on both sides in the thickness direction, respectively. The support surface is adapted to fit against the end face of the battery pack, and the mating surface is adapted to fit against the partition beam. The bottom of the end plate forms a guide surface, which is inclined toward the support surface in the direction toward the bottom.

[0017] According to one embodiment of the present invention, the battery pack further includes a heating film extending in a second direction, wherein the heating film is respectively attached to the first battery cell and the second battery cell on both sides in the thickness direction, and the two ends of the heating film are respectively fixed to the end plates located at both ends of the battery pack.

[0018] According to one embodiment of the present invention, a first gap is formed between two adjacent first cells, and a second gap is formed between two adjacent second cells; a clearance hole is formed on the heating film assembly in a first direction, one end of the clearance hole is directly opposite to the first gap, and the other end of the clearance hole is directly opposite to the second gap.

[0019] According to one embodiment of the present invention, the power distribution box assembly includes a base, a first output copper busbar, and a second output copper busbar. The base extends in a first direction and has a first receiving cavity open to one side, the first receiving cavity being adapted to accommodate electrical components. A first connector and a second connector respectively connect the electrical connection terminal to the positive terminal of one of the battery packs and the negative terminal of the other battery pack. The first connector and the second connector are respectively disposed at both ends of the base in the first direction. The first output copper busbar and the second output copper busbar are respectively connected to the electrical components. The first output copper busbar and the second output copper busbar are respectively disposed on the same side of the base in a second direction and located between the first connector and the second connector.

[0020] According to one embodiment of the present invention, a first mounting groove and a second mounting groove are formed on the base, which are adjacent to each other and open toward a second direction, and the other end of the first output copper busbar and the other end of the second output copper busbar are respectively received in the first mounting groove and the second mounting groove.

[0021] According to one embodiment of the present invention, the electrical component includes a main fuse, a main relay, a pre-charge resistor, and a pre-charge relay. The main fuse and the main relay are disposed on one side of the first receiving cavity in a second direction and are spaced apart on one side in a first direction. The pre-charge resistor and the pre-charge relay are disposed on the other side of the first receiving cavity in a second direction and are spaced apart on one side in a first direction.

[0022] According to one embodiment of the present invention, the electrical components further include a secondary relay and a heating relay, a shunt and a heating fuse, wherein the shunt and the heating fuse are arranged at a distance from each other in a second direction of the first receiving cavity; the heating relay and the shunt are arranged overlapping each other in a third direction of the first receiving cavity.

[0023] According to one embodiment of the present invention, the first output copper busbar extends in a first direction, one end of the first output copper busbar is connected to the main relay, and the other end of the first output copper busbar is received in the first mounting slot.

[0024] According to one embodiment of the present invention, the second output copper busbar includes a first plate, a second plate, and a third plate, wherein the first plate is connected to the auxiliary relay; the second plate is disposed in the second mounting groove; and the third plate extends upward from the third side of the first receiving cavity and is connected to the first plate and the second plate respectively.

[0025] The vehicle according to the present invention is briefly described below.

[0026] The vehicle according to the present invention includes the battery pack described in any of the above embodiments. Since the vehicle according to the present invention is equipped with the battery pack described in any of the above embodiments, the performance and safety of the vehicle can be improved after the battery pack is assembled with the vehicle, thereby improving the user experience.

[0027] Additional aspects and advantages of the invention 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 the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1This is an assembly drawing of the base plate, frame, and partition beam of a battery pack according to an embodiment of the present invention;

[0030] Figure 2 This is a structural diagram of a battery pack according to an embodiment of the present invention;

[0031] Figure 3 This is a cooling channel distribution diagram of a battery pack according to an embodiment of the present invention;

[0032] Figure 4 This is a cooling channel distribution diagram in a battery pack according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the first heat exchange zone of a battery pack according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the second heat exchange zone of a battery pack according to an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the third heat exchange zone of a battery pack according to an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the fourth heat exchange zone of a battery pack according to an embodiment of the present invention;

[0037] Figure 9 This is a structural diagram of the heating film of a battery pack according to an embodiment of the present invention;

[0038] Figure 10 This is a structural diagram of the end plate of a battery pack according to an embodiment of the present invention;

[0039] Figure 11 This is a schematic diagram of a battery pack according to an embodiment of the present invention.

[0040] Figure 12 This is a structural diagram of a power distribution box assembly according to an embodiment of the present invention;

[0041] Figure 13 This is a top view of a power distribution box assembly according to an embodiment of the present invention;

[0042] Figure 14 This is a front view of a power distribution box assembly according to an embodiment of the present invention;

[0043] Figure 15 This is a simplified structural diagram of the clearance notch according to an embodiment of the present invention;

[0044] Figure 16 This is a structural diagram of a power distribution box assembly according to an embodiment of the present invention;

[0045] Figure 17 This is a structural diagram of a battery pack according to an embodiment of the present invention;

[0046] Figure 18 This is a structural diagram of a battery pack according to an embodiment of the present invention;

[0047] Figure 19 This is a cross-sectional view of an adapter box according to an embodiment of the present invention.

[0048] Figure label:

[0049] Battery pack 1;

[0050] Base plate 11, heat exchange plate 111, extension plate 112, adapter box 1121, conversion flow channel 11211, main body 1122;

[0051] Frame 12, partition beam 13, battery pack 14, first cell 141, second cell 142;

[0052] End plate 15, mating surface 151, guide surface 152; heating film 16, clearance hole 161;

[0053] Inlet 10, outlet 20;

[0054] Distribution box assembly 21;

[0055] Base 211, snap-fit ​​protrusion 2111;

[0056] First connector 2121, second connector 2122;

[0057] First output copper busbar 2131, second output copper busbar 2132, first board 21321, second board 21322, third board 21323;

[0058] Top cover 214, clearance notch 2141, slide groove 21411, hook 21412, buckle 2142;

[0059] First mounting slot 2151, second mounting slot 2152;

[0060] Protective cover 216, first locking block 2161, second locking block 2162;

[0061] Main fuse 2171, main relay 2172, pre-charge resistor 2173, pre-charge relay 2174, auxiliary relay 2175, shunt 2176, heating fuse 2177, heating relay 2178;

[0062] First cavity 2102, second cavity 2103, vibration damping pad 2104;

[0063] First branch flow path 31, second branch flow path 32, third branch flow path 33;

[0064] First water inlet flow path 41, second water inlet flow path 42, third water inlet flow path 43;

[0065] First water outlet path 51, second water outlet path 52, third water outlet path 53, and fourth water outlet path 54. Detailed Implementation

[0066] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0067] In existing technologies, longitudinal beams are used in battery packs to support and fix the battery cells. This beam structure increases the weight of the battery pack and occupies internal space, hindering lightweight design and improvements in energy density. Furthermore, the cell assembly process is relatively complex.

[0068] The following is for reference. Figures 1-16 A battery pack according to an embodiment of the present invention is described.

[0069] The battery pack 1 according to the present invention includes a base plate 11, a frame 12, a battery pack 14, and a power distribution box assembly 21. The frame 12 is disposed around the outer periphery of the base plate 11 and defines a cell receiving cavity with the base plate 11. An electrical connection terminal is provided on the frame 12. A partition beam 13 is disposed on the base plate 11 and located in the cell receiving cavity. The partition beam 13 is configured to extend in a first direction and be spaced apart in a second direction to define a first cavity 2102 and a second cavity 2103. The battery pack 14 is housed in the first cavity 2102 and is configured to be arranged in multiple groups in sequence in the first direction. Each battery pack 14 is provided with multiple individual cells, which extend in the second direction and are arranged in sequence along the first direction. And / or multiple individual cells extend in the first direction and are arranged in sequence along the second direction. The power distribution box assembly 21 is disposed in the second cavity 2103 and is electrically connected to the multiple battery packs 14 and to the electrical connection terminal.

[0070] Specifically, the battery pack 1 is provided with a base plate 11, and a frame 12 defines a cell receiving cavity around the base plate 11 to accommodate the cells, providing space for cell assembly. A partition beam 13 is provided in the cell receiving cavity. Multiple partition beams 13 are constructed to extend in a first direction and be spaced apart in a second direction. These partition beams 13 are respectively connected to the base plate 11 to define a first cavity 2102 and a second cavity 2103. The first cavity 2102 can be used to assemble the battery pack 14. Within the first cavity 2102, the battery pack 14 is constructed as multiple groups arranged sequentially in the first direction. Each battery pack 14 includes multiple individual cells. These individual cells extend in the first direction and are arranged sequentially along the second direction. This sequential arrangement of multiple individual cells increases the energy density of the battery pack 14, thereby increasing the energy density of the battery pack 1. During assembly, the two ends of the partition beams 13 are fixed to the frame 12. The battery pack 14 can be fixed by the partition beams 13 and the frame 12, improving the stability of the battery pack 14 assembly. The absence of longitudinal beams between the multiple battery packs 14 helps reduce the weight of the battery pack 1, achieving lightweight design. Furthermore, the absence of longitudinal beams saves internal space, allowing the battery pack 1 to accommodate more battery packs 14 and increasing its energy density. The second cavity 2103 can be used to assemble the power distribution box assembly 21. Within the second cavity 2103, the power distribution box assembly 21 is connected to the multiple battery packs 14 and the electrical connection terminals on the frame 12, facilitating the input and output of energy from the battery pack 1.

[0071] Furthermore, the configuration of the battery pack 14 can be determined according to the actual situation. For example, the individual cells can be constructed as a row in the second direction, and each battery pack 14 includes two rows of individual cells. The individual cells can be constructed as multiple cells extending along the first direction and arranged sequentially in the second direction. Multiple individual cells can be constructed as a row in the second direction, or individual cells can be constructed as cells extending along the second direction and arranged in separate rows. A battery pack 14 can include multiple individual cells extending in the second direction and arranged sequentially in the first direction. A battery pack 14 can also include multiple individual cells extending in the first direction and arranged sequentially in the second direction.

[0072] According to the present invention, the battery pack 1 defines a first cavity 2102 and a second cavity 2103 within the cell housing cavity by providing a partition beam 13 in the cell housing cavity. Multiple battery packs 14 can be installed in the first cavity 2102, and each battery pack 14 is fixed to the base plate 11, the partition beam 13, and the frame 12. No longitudinal beams are needed to support and fix the battery packs 14, saving internal space and reducing the weight of the battery pack 1. Furthermore, more battery packs 14 can be installed in the battery pack 1 to increase its energy density. The power distribution box assembly 21 is assembled within the second cavity 2103 and connected to the multiple battery packs 14, improving the compactness of the battery pack 1.

[0073] According to one embodiment of the present invention, the base plate 11 is provided with a heat exchange zone, and the partition beam 13 is disposed within the heat exchange zone or located at the edge of the heat exchange zone. The base plate 11 is provided with a cooling channel within the heat exchange zone, and the base plate 11 is adapted to exchange heat with the battery pack 14. The battery pack 1 has a heat exchange zone on the base plate 11, and a cooling channel is formed within the heat exchange zone. A heat exchange medium can be disposed within the cooling channel. When the battery pack 14 is assembled, the heat exchange medium flows within the cooling channel and exchanges heat with the battery pack 14 to ensure that the temperature of the battery pack 1 is at a suitable temperature, thereby improving the working performance and safety of the battery pack 1.

[0074] According to one embodiment of the present invention, the battery pack 14 is configured as a plurality of cells arranged sequentially in a first direction, and each battery pack 14 is provided with a plurality of cells arranged sequentially in a second direction; the base plate 11 is provided with a water inlet 10 and a water outlet 20, and the cooling channel includes an inlet flow path connected to the water inlet 10 and an outlet flow path connected to the water outlet 20; the heat exchange zone is configured as a plurality of cells, and each heat exchange zone corresponds to a plurality of battery packs 14, and the base plate 11 forms a plurality of branch flow paths corresponding to the battery packs 14 in the heat exchange zone, the upstream end of the branch flow path is connected to the inlet flow path, and the downstream end of the branch flow path is connected to the outlet flow path.

[0075] Multiple battery cells are arranged sequentially in the second direction to form a battery pack 14. The battery pack 1 may include multiple battery packs 14. The multiple battery packs 14 are arranged sequentially in the first direction, which improves the energy density of the battery pack 1. The multiple battery packs 14 are disposed in the heat exchange zone of the base plate 11. The heat exchange zone is provided with cooling channels. The heat exchange medium flows in the cooling channels to exchange heat with the battery packs 14 in the heat exchange zone. Multiple battery cells abut against the base plate 11 to heat or cool the multiple battery cells through the base plate 11. One heat exchange zone corresponds to multiple battery packs 14. Multiple branch flow paths are formed in each heat exchange zone. One battery pack 14 corresponds to multiple branch flow paths. The base plate 11 is provided with an inlet flow path and an outlet flow path. The base plate 11 is also provided with an inlet 10 and an outlet 20. One end of the inlet flow path is connected to the inlet 10 and the other end is connected to the upstream end of the branch flow path. One end of the outlet flow path is connected to the outlet 20 and the other end is connected to the downstream end of the branch flow path.

[0076] The heat exchange medium flows out of the outlet 20 after passing through the inlet 10, the inlet flow path, the branch flow path, and the outlet flow path in sequence. During the flow, the heat exchange medium exchanges heat with multiple individual battery cells. One heat exchange zone corresponds to multiple battery packs 14, and one battery pack 14 corresponds to multiple branch flow paths. The heat exchange medium flowing in multiple branch flow paths can exchange heat with the battery pack 14, thereby improving the heat exchange effect of the battery pack 14. When the battery pack 14 is working, the ambient temperature around the battery pack 14 will affect the working efficiency of the battery pack 14. Therefore, the above settings can make the temperature of the battery pack 14 more stable during operation, making the working efficiency of the battery pack 14 more stable, thereby improving the working stability of the battery pack 1. This application provides heat exchange for the battery pack 14 by setting multiple heat exchange zones within the base plate 11 and cooling channels within these zones. Each heat exchange zone corresponds to multiple battery packs 14, and each battery pack 14 is associated with multiple branch flow paths. These branch flow paths are all suitable for heating or cooling the battery pack 14, thereby increasing the heat exchange area of ​​the branch flow paths and improving the heat exchange effect of the base plate 11 on the battery pack 14. This results in a more stable operating temperature for the battery pack 14 and improves the operational stability of the battery pack 1.

[0077] In some embodiments, the heat exchange zone may not be provided on the base plate 11, and air cooling may be used instead. This solution is suitable for battery packs 1 with a small number of battery packs 14.

[0078] According to one embodiment of the present invention, in a heat exchange zone, a plurality of branch flow paths extend along a first direction and are spaced apart in a second direction, the heat exchange medium in at least one branch flow path flows along the first flow direction, and the heat exchange medium in at least another branch flow path flows along the second flow direction, the first flow direction being opposite to the second flow direction.

[0079] The branch flow paths extend in the second direction, and multiple branch flow paths are spaced apart in the first direction, making the layout of the branch flow paths more compact and facilitating the arrangement of more branch flow paths. The heat exchange medium enters from the inlet 10 and flows sequentially through the inlet flow path, the branch flow path, and the outlet flow path before being discharged from the outlet 20. During the flow process, the heat exchange medium exchanges heat with the battery pack 14. As the heat exchange medium flows, the heat loss of the heat exchange medium gradually increases. The increased heat loss of the heat exchange medium will reduce the heat exchange effect on the individual battery cells. By making the heat exchange medium flow in the first flow direction in some branch flow paths and in the second flow direction in some branch flow paths, and with the first flow direction and the second flow direction being opposite, the phenomenon that some battery cells have good heat exchange effect and some battery cells have poor heat exchange effect can be avoided in the heat exchange zone, so that the heat exchange of multiple battery cells in the heat exchange zone by the base plate 11 is more balanced. Within a heat exchange zone, at least some adjacent branch flow paths flow in opposite directions and are interconnected. Thus, the above arrangement allows the heat exchange medium to flow continuously within the heat exchange zone, preventing the heat exchange medium from directly entering the outlet flow path after passing through a branch flow path. This extends the residence time of the heat exchange medium within the heat exchange zone and improves the utilization rate of the heat exchange medium.

[0080] In some embodiments, the number of branch flow paths along the first flow direction is i1, and the number of branch flow paths along the second flow direction is i2, satisfying: 0.3≤i1 / i2≤1. This arrangement allows multiple branch flow paths to be connected in series and / or in parallel, extending the residence time of the heat exchange medium in the heat exchange zone and improving the heat exchange effect of the heat exchange medium on the battery pack 14. However, it is understood that if the heat exchange medium flows entirely along the first or second flow direction, the heat exchange effect of the heat exchange medium gradually decreases in that direction, resulting in some battery cells having good heat exchange effects while others have poor heat exchange effects within the battery pack 14. Therefore, by allowing the heat exchange medium to flow along the first and second flow directions respectively in multiple branch flow paths, a more balanced heat exchange can be achieved for the multiple battery cells in the battery pack 14, thereby improving the heat exchange effect of the battery pack 14, making the temperature of the battery pack 14 more stable during operation, thus making the working efficiency of the battery pack 14 more stable, and ultimately improving the working stability of the battery pack 14.

[0081] According to one embodiment of the present invention, a plurality of branch flow paths include a first branch flow path 31, a second branch flow path 32, and a third branch flow path 33. The first branch flow path 31 and the second branch flow path 32 are respectively disposed on both sides of the heat exchange zone in a first direction. The third branch flow paths 33 are configured to be interconnected, and the plurality of third branch flow paths 33 are disposed between the first branch flow path 31 and the second branch flow path 32. The first branch flow path 31 and the second branch flow path 32 are respectively connected to the plurality of third branch flow paths 33. In at least one heat exchange zone, the first branch flow path 31 is connected to the inlet flow path, the second branch flow path 32 is connected to the outlet flow path, and / or the first branch flow path 31 and the second branch flow path 32 of at least one heat exchange zone are connected to the inlet flow path, and at least one third branch flow path 33 is connected to the outlet flow path.

[0082] In multiple heat exchange zones, at least one end of the first branch flow path 31 and one end of the second branch flow path 32 in at least one heat exchange zone are connected to the inlet flow path, and the other ends of the first branch flow path 31 and the second branch flow path 32 are respectively connected to at least one third branch flow path 33. Among the multiple third branch flow paths 33, the third branch flow path 33 connected to the first branch flow path 31 and the third branch flow path 33 connected to the second branch flow path 32 are respectively connected to the outlet flow path. Of course, it is also possible that one end of one of the multiple third branch flow paths 33 is connected to the first branch flow path 31 and the second branch flow path 32 respectively, and the other end of the third branch flow path 33 is connected to the outlet flow path. There is no limitation here.

[0083] In one heat exchange zone, the portion of the battery pack 14 near the outer periphery of the heat exchange zone is constructed as an edge. Because the edge has a larger contact area with the external environment, the heat loss at the edge is greater when the base plate 11 heats multiple battery packs 14, resulting in lower heating efficiency. When the base plate 11 heats the battery packs 14, the heat exchange medium heats the multiple battery packs 14 corresponding to the heat exchange zone starting from the first branch flow path 31 and the second branch flow path 32. The first branch flow path 31 and the second branch flow path 32 correspond to the edge, and because the heat loss of the heat exchange medium is smaller when flowing in the first branch flow path 31 and the second branch flow path 32, the heating effect of the first branch flow path 31 and the second branch flow path 32 on the edge is better. Therefore, the above arrangement can improve the heating effect on the edge to eliminate heat loss at the edge, thereby making the heating of the battery packs 14 corresponding to the heat exchange zone more even, improving the heating effect of the battery packs 14 corresponding to the heat exchange zone, and improving the cold start capability of the battery pack 1.

[0084] In some embodiments, in multiple heat exchange zones, in at least one heat exchange zone, the first branch flow path 31 is connected to the water inlet flow path and the second branch flow path 32 is connected to the water outlet flow path. Thus, after the heat exchange medium enters the heat exchange zone from the water inlet flow path, the heat exchange medium sequentially passes through the first branch flow path 31, the third branch flow path 33, and the second branch flow path 32 and then enters the water outlet flow path. The flow path of the heat exchange medium is simple, which simplifies the setting mode of the first branch flow path 31, the second branch flow path 32, and the third branch flow path 33 in the heat exchange zone, improves the production efficiency of the bottom plate 11. At the same time, the residence time of the heat exchange medium in the heat exchange zone is prolonged, and the utilization rate of the heat exchange medium is improved.

[0085] According to an embodiment of the present invention, the multiple heat exchange zones include a first heat exchange zone, a second heat exchange zone, a third heat exchange zone, and a fourth heat exchange zone. The first heat exchange zone and the second heat exchange zone are spaced apart in a first direction. The first heat exchange zone and the third heat exchange zone are spaced apart in a second direction. The fourth heat exchange zone and the third heat exchange zone are spaced apart in the first direction and the fourth heat exchange zone and the second heat exchange zone are spaced apart in the second direction. The water inlet 10 is arranged in the first heat exchange zone, and the water outlet 20 is arranged in the third heat exchange zone.

[0086] Specifically, the first heat exchange zone, the second heat exchange zone, the third heat exchange zone, and the fourth heat exchange zone are arranged in a "field" shape on the bottom plate 11. The layout of the multiple heat exchange zones is compact and regular, which improves the space utilization rate of the bottom plate 11. At the same time, the manufacturing process of the bottom plate 11 is simplified, and the production efficiency of the bottom plate 11 is improved.

[0087] The water inlet 10 is arranged in the first heat exchange zone and the water outlet 20 is arranged in the third heat exchange zone. Thus, the heat exchange medium can enter the water inlet flow path from the water inlet 10, exchange heat with the first heat exchange zone, and then return to the third heat exchange zone through the water outlet flow path, and finally be discharged from the water outlet 20. At this time, the heat exchange medium can exchange heat with the first heat exchange zone and the third heat exchange zone. The heat exchange medium can enter the second heat exchange zone through the water inlet flow path, exchange heat with the second heat exchange zone, and then return to the third heat exchange zone through the water outlet flow path, and finally be discharged from the water outlet 20. At this time, the heat exchange medium can exchange heat with the first heat exchange zone, the second heat exchange zone, and the third heat exchange zone. The heat exchange medium enters the third heat exchange zone through the water inlet flow path, and after exchanging heat with the third heat exchange zone, is discharged through the water outlet flow path and the water outlet 20. At this time, the heat exchange medium can exchange heat with the first heat exchange zone and the third heat exchange zone. The heat exchange medium can enter the fourth heat exchange zone through the water inlet flow path, exchange heat with the fourth heat exchange zone, and then return to the third heat exchange zone through the water outlet flow path, and finally be discharged from the water outlet 20. At this time, the heat exchange medium can exchange heat with the first heat exchange zone, the fourth heat exchange zone, and the third heat exchange zone. Thus, through the above settings, the residence time of the heat exchange medium in the heat exchange zone can be prolonged, and the utilization rate of the heat exchange medium is improved.

[0088] According to one embodiment of the present invention, the water inlet flow path includes a first water inlet flow path 41, a second water inlet flow path 42, and a third water inlet flow path 43. One end of the first water inlet flow path 41 is connected to the water inlet 10, and at least a portion of the first water inlet flow path 41 is disposed on the outer periphery of the first heat exchange zone. The other end of the first water inlet flow path 41 is connected to the first branch flow path 31 and the second branch flow path 32 of the second heat exchange zone. One end of the second water inlet flow path 42 is connected to the water inlet 10, and the other end of the second water inlet flow path 42 is connected to the first branch flow path 31 and the second branch flow path 32 of the first heat exchange zone. One end of the third water inlet flow path 43 is connected to the water inlet 10, and the other end of the third water inlet flow path 43 is connected to the first branch flow path 31 of the third heat exchange zone, and / or, the other end of the third water inlet flow path 43 is connected to the first branch flow path 31 of the fourth heat exchange zone and at least one third branch flow path 33.

[0089] Since the heat exchange medium enters the water-cooled plate through the inlet water flow path, and the water-cooled plate is equipped with multiple heat exchange zones, the construction of the inlet water flow path is crucial to the entry of the heat exchange medium into each heat exchange zone. Specifically, the inlet water flow path includes a first inlet water flow path 41, a second inlet water flow path 42, and a third inlet water flow path 43. Each of the three inlet water flow paths is connected to its corresponding heat exchange zone, and the three inlet water flow paths do not interfere with each other, ensuring that the heat exchange medium can flow normally into the corresponding heat exchange zone to realize the heat exchange function of the water-cooled plate.

[0090] like Figure 6 As shown, the first inlet water flow path 41 connects the second heat exchange zone to the inlet 10. Specifically, one end of the first inlet water flow path 41 is connected to the inlet 10, and the other end is connected to the first branch flow path 31 and the second branch flow path 32 of the second heat exchange zone. This means that within the second heat exchange zone, the heat exchange medium flows simultaneously from the first branch flow path 31 and the second branch flow path 32 towards the interior of the second heat exchange zone, improving the heat exchange capacity of at least a portion of the edges of the second heat exchange zone. Furthermore, at least a portion of the first inlet water flow path 41 is located on the outer periphery of the first heat exchange zone, allowing simultaneous heat exchange on the corresponding battery cells within the first heat exchange zone, thus improving the heat exchange capacity of the first heat exchange zone.

[0091] like Figure 5 As shown, the second inlet flow path 42 connects the first heat exchange zone to the inlet 10. Specifically, one end of the second inlet flow path 42 is connected to the inlet 10, and the other end of the second inlet flow path 42 is connected to the first branch flow path 31 and the second branch flow path 32 of the first heat exchange zone. It can be understood that in the first heat exchange zone, the heat exchange medium flows from the first branch flow path 31 and the second branch flow path 32 towards the interior of the first heat exchange zone at the same time, which improves the heat exchange capacity of at least part of the edge of the first heat exchange zone.

[0092] like Figure 7 and Figure 8As shown, the third inlet flow path 43 connects the third heat exchange zone and the fourth heat exchange zone to the inlet 10. Specifically, one end of the third inlet flow path 43 is connected to the inlet 10, and the other end is connected to the first branch flow path 31 of the third heat exchange zone, the first branch flow path 31 of the fourth heat exchange zone, and a third branch flow path 33. In the third heat exchange zone, the heat exchange medium transported by the third inlet flow path 43 flows in from one side and out from the other side. The heat exchange medium is diverted by the multiple third branch flow paths 33 in the third heat exchange zone, increasing the heat exchange area and thus improving the heat exchange capacity of the third heat exchange zone. In the fourth heat exchange zone, the heat exchange medium transported by the third inlet flow path 43 flows in from both one side and the middle of the fourth heat exchange zone and out from the other side, accelerating the flow of the heat exchange medium into the fourth heat exchange zone. The middle-flow method can accelerate the heat exchange efficiency in the middle of the fourth heat exchange zone, thereby improving the overall heat exchange effect of the fourth heat exchange zone.

[0093] According to one embodiment of the present invention, the water outlet path includes a first water outlet path 51, a second water outlet path 52, a third water outlet path 53, and a fourth water outlet path 54. One end of the first water outlet path 51 is connected to at least one third branch path 33 of the second heat exchange zone, and the other end of the first water outlet path 51 flows sequentially through the outer periphery of the fourth and third heat exchange zones and connects to the outlet 20 through a connecting pipe. Thus, the heat exchange medium flows through the second heat exchange zone and then enters the first water outlet path 51. When the heat exchange medium flows through the first water outlet path 51, it can exchange heat with the edges of the fourth and third heat exchange zones, thereby improving the efficiency of the heat exchange medium. The utilization rate is improved. At the same time, the first outlet flow path 51 collects the heat exchange medium from multiple branch flow paths in the second heat exchange zone. Therefore, the flow rate of the heat exchange medium in the first outlet flow path 51 is greater than the flow rate of the heat exchange medium in the branch flow paths of the second heat exchange zone. When the heat exchange medium flows in the first outlet flow path 51 and exchanges heat with the edges of the fourth and third heat exchange zones, the large flow rate of the heat exchange medium in the first outlet flow path 51 can improve the heating effect on the edges of the fourth and third heat exchange zones, making the heating of multiple battery packs 14 by the base plate 11 more balanced and improving the cold start capability of the battery packs 14.

[0094] like Figure 5As shown, one end of the second outlet flow path 52 is connected to at least one third branch flow path 33 of the first heat exchange zone, and the other end of the second outlet flow path 52 flows sequentially through the outer periphery of the second and fourth heat exchange zones and connects to the first outlet flow path 51. Thus, the heat exchange medium enters the second outlet flow path 52 after flowing through the first heat exchange zone. When the heat exchange medium flows in the second outlet flow path 52, it can exchange heat at the edges of the second and fourth heat exchange zones, improving the utilization rate of the heat exchange medium. At the same time, the second outlet flow path 52 connects to the first outlet flow path 51 in the fourth heat exchange zone, and the heat exchange medium flowing in the second outlet flow path 52 undergoes heat exchange in the fourth heat exchange zone. The water enters the first outlet flow path 51 and flows back to the outlet 20 through the first outlet flow path 51, avoiding the need to extend the second outlet flow path 52 to connect with the outlet 20. This shortens the setting path of the second outlet flow path 52, simplifies the manufacturing process of the base plate 11, and improves the production efficiency of the base plate 11. At the same time, the second outlet flow path 52 collects the heat exchange medium from multiple branch flow paths in the first heat exchange zone. As a result, the flow rate of the heat exchange medium in the second outlet flow path 52 is greater than the flow rate of the heat exchange medium in the branch flow paths of the first heat exchange zone, thereby improving the heating effect of the edge of the battery pack 14 corresponding to the second and fourth heat exchange zones respectively.

[0095] like Figure 7 As shown, one end of the third outlet flow path 53 is connected to the second branch flow path 32 of the third heat exchange zone, and the other end of the third outlet flow path 53 flows through the outer periphery of the third heat exchange zone and is connected to the outlet 20. Thus, when the heat exchange medium flows in the third outlet flow path 53, it can exchange heat on the edge of the third heat exchange zone, thereby improving the utilization rate of the heat exchange medium. At the same time, the third outlet flow path 53 collects the heat exchange medium from multiple branch flow paths in the third heat exchange zone. Thus, the flow rate of the heat exchange medium in the third outlet flow path 53 is greater than the flow rate of the heat exchange medium in the branch flow paths of the third heat exchange zone, thereby improving the heating effect on the edge of the battery pack 14 corresponding to the third heat exchange zone.

[0096] like Figure 8 As shown, one end of the fourth water outlet flow path 54 is connected to the second branch flow path 32 and at least one third branch flow path 33 of the fourth heat exchange zone. The other end of the fourth water outlet flow path 54 flows sequentially through the outer periphery of the fourth heat exchange zone and the outer periphery of the third heat exchange zone and is connected to the water outlet 20. Thus, when the heat exchange medium flows in the fourth water outlet flow path 54, it can exchange heat on the edges of the fourth heat exchange zone and the third heat exchange zone, thereby improving the utilization rate of the heat exchange medium. At the same time, the fourth water outlet flow path 54 collects the heat exchange medium from multiple branch flow paths in the fourth heat exchange zone. Therefore, the flow rate of the heat exchange medium in the fourth water outlet flow path 54 is greater than the flow rate of the heat exchange medium in the branch flow paths of the fourth heat exchange zone, thereby improving the heating effect on the edges of the battery pack 14 corresponding to the fourth heat exchange zone and the third heat exchange zone, respectively.

[0097] In some embodiments, the inlet 10 is disposed on one side of the first heat exchange zone in the second direction, and the outlet 20 is disposed on one side of the third heat exchange zone in the second direction. It is understood that, in the second direction, the inlet 10 and outlet 20 are respectively disposed on the same side of the first and third heat exchange zones. The inlet 10 of the base plate 11 is connected to the cooling device via a first pipe, and the outlet 20 of the base plate 11 is connected to the cooling device via a second pipe. Therefore, this arrangement simplifies the connection process between the base plate 11 and the cooling device. In the first direction, the inlet 10 is disposed on the side of the first heat exchange zone closer to the third heat exchange zone, and the outlet 20 is disposed on the side of the third heat exchange zone closer to the first heat exchange zone. Therefore, when connecting the base plate 11 and the cooling device, the first pipe and the second pipe can be more conveniently connected to the inlet 10 and the outlet 20, respectively, further simplifying the connection process between the base plate 11 and the cooling device.

[0098] In some embodiments, at least a portion of the third inlet flow path 43 and the third outlet flow path 53 are disposed between the first heat exchange zone and the third heat exchange zone. It is understood that at least a portion of the third inlet flow path 43 can exchange heat at the edge of the first heat exchange zone, and at least a portion of the third outlet flow path 53 can exchange heat at the edge of the third heat exchange zone. Furthermore, this arrangement allows at least a portion of the third inlet flow path 43 and at least a portion of the third outlet flow path 53 to be disposed adjacent to each other, thereby ensuring more even heat exchange at the edges of the battery pack 14 corresponding to the first and third heat exchange zones.

[0099] In some embodiments, the flow resistance of the branch flow path in the first heat exchange zone is R1, the flow resistance of the branch flow path in the second heat exchange zone is R2, the flow resistance of the branch flow path in the third heat exchange zone is R3, and the flow resistance of the branch flow path in the fourth heat exchange zone is R4, satisfying: R1 > R3 > R2 > R4. The flow rates of the heat exchange medium in the first, second, third, and fourth heat exchange zones are Q1, Q2, Q3, and Q4, respectively. The greater the flow resistance of the branch flow path, the faster the flow velocity of the heat exchange medium in the branch flow path, that is, the shorter the residence time of the heat exchange medium in the branch flow path, resulting in a smaller flow rate in the branch flow path. As the heat exchange medium flows, the heat loss of the heat exchange medium gradually increases. It can be understood that the time for the heat exchange medium to enter the first heat exchange zone is t1, the time for the heat exchange medium to enter the second heat exchange zone is t2, the time for the heat exchange medium to enter the third heat exchange zone is t3, and the time for the heat exchange medium to enter the fourth heat exchange zone is t4. Compared with the second and third heat exchange zones, the inlet 10 is different from the first heat exchange zone. The distance between the three heat exchange zones is less than the distance between the inlet 10 and the second heat exchange zone. Therefore, t3 > t2. Compared with the fourth heat exchange zone, the distance between the inlet 10 and the second heat exchange zone is equal to the distance between the inlet 10 and the fourth heat exchange zone, i.e., t2 = t4. However, since the third heat exchange zone and the fourth heat exchange zone share the third inlet 10, the efficiency of the heat exchange medium entering the second heat exchange zone is greater than the efficiency of the heat exchange medium entering the fourth heat exchange zone. Thus, through the above settings, Q4 > Q2 > Q3 > Q1 can be made so that the heat exchange of the heat exchange medium on the battery pack 14 corresponding to the first heat exchange zone, the second heat exchange zone, the third heat exchange zone and the fourth heat exchange zone is more balanced.

[0100] In some embodiments, the cross-sectional area of ​​the branch flow path in the first heat exchange zone is S1, the cross-sectional area of ​​the branch flow path in the second heat exchange zone is S2, the cross-sectional area of ​​the branch flow path in the third heat exchange zone is S3, and the cross-sectional area of ​​the branch flow path in the fourth heat exchange zone is S4, satisfying: S4 > S2 > S3 > S1. The flow resistance of the heat exchange medium in the branch flow path can be controlled by setting baffles or the cross-sectional area of ​​the branch flow path; no limitation is made here. Therefore, by setting S4 > S2 > S3 > S1, R1 > R3 > R2 > R4 can be achieved, thereby achieving Q4 > Q2 > Q3 > Q1.

[0101] In some embodiments, the base plate 11 may be provided with a heat exchange plate 111 and an extension plate 112. The heat exchange plate 111 may be provided with the heat exchange zone in the above embodiments. The extension plate 112 may be provided at the outer periphery of the frame 12. The extension plate 112 is connected to the heat exchange plate 111. The extension plate 112 protrudes from the outer periphery of the frame 12 and extends in a direction away from the cell housing cavity. The extension plate 112 may also be provided with a water inlet 10 and a water outlet 20. The water inlet 10 and the water outlet 20 are respectively connected to the cooling flow channel of the heat exchange plate 111. The water inlet 10 and the water outlet 20 are provided outside the frame 12 so that when the water inlet 10 or the water outlet 20 leaks, the heat exchange medium will not flow into the cell, effectively preventing short circuits inside the battery pack 1 and ensuring the safety and reliability of the battery pack 1 during operation.

[0102] In some embodiments, the extension plate 112 comprises a body portion 1122 and an adapter box 1121. The body portion 1122 is disposed at the edge of the outer periphery of the frame 12. One end of the body portion 1122 is connected to the heat exchange plate 111, and the other end of the body portion 1122 protrudes from the outer periphery of the frame 12 and extends in a direction away from the heat exchange plate 111. The adapter box 1121 is disposed on the third-direction side of the body portion 1122. The body portion 1122 can be used to support and fix the adapter box 1121, improving the stability and reliability of the adapter box 1121 during operation. The adapter box 1121 is located away from the frame in a second direction. An inlet 10 and an outlet 20 are formed on one side of the frame. A conversion channel 11211 can be provided in the adapter box 1121 to connect the inlet 10 or the outlet 20 to the cooling channel on the heat exchange plate. At least a portion of the conversion channel 11211 can extend upward in a third direction, and at least another portion of the conversion channel 11211 can extend in a first direction and / or a second direction. The configuration of the conversion channel 11211 allows the battery pack 1 to be adapted to different positions for assembly without the need for additional water channel conversion components, thereby improving the assembly efficiency of the battery pack 1 and the vehicle and reducing the manufacturing cost of the battery pack 1.

[0103] In some embodiments, at least a portion of the conversion channel 11211 and at least another portion of the conversion channel 11211 may be provided with a circular arc transition. The circular arc transition can reduce the friction between the heat exchange medium and the conversion channel 11211, thereby reducing the flow resistance of the heat exchange medium and improving the smoothness of the heat exchange medium flow. The circular arc transition can also avoid the pressure loss caused by right angle or sharp transition, and ensure the stability and flow rate of the heat exchange medium during flow.

[0104] According to one embodiment of the present invention, the two ends of the partition beam 13 extend to connect with the frame 12, and the surfaces of two adjacent partition beams 13 facing each other are respectively formed with a first limiting surface and a second limiting surface, and the first limiting surface and the second limiting surface are arranged facing each other in a second direction; wherein the two ends of a plurality of battery packs 14 respectively abut against the first limiting surface and the second limiting surface, and two adjacent battery packs 14 are spaced apart in the first direction.

[0105] Each battery pack 14 has its two ends abutting against the first limiting surface and the second limiting surface, respectively. The bottom of each battery pack 14 is fixed to the base plate 11, ensuring that multiple battery packs 14 are stably installed in the battery pack 1. The battery packs 14 can be fixed without the need for longitudinal beams, which helps to reduce the weight of the battery pack 1 and saves more space in the battery pack 1, allowing the battery pack 1 to accommodate more battery packs 14 and improve the energy density of the battery pack 1. The two adjacent battery packs 14 are spaced apart in the first direction to avoid heat accumulation and uneven temperature during the heating process, ensuring that the battery packs 14 operate within a suitable temperature range.

[0106] According to one embodiment of the present invention, the battery pack 14 includes a first cell 141 and a second cell 142. The first cell 141 is configured to be arranged in a plurality of sequential arrangements in a second direction; the second cell 142 is configured to be arranged in a plurality of sequential arrangements in a second direction, and any one of the first cell 141 and the second cell 142 is correspondingly arranged in the first direction.

[0107] Specifically, the first cell 141 and the second cell 142 are respectively configured as multiple cells arranged sequentially in the second direction. A battery pack 14 includes two rows of cells extending in the second direction and facing each other in the first direction. By arranging a row of first cells 141 and a row of second cells 142 in the first direction with intervals and side by side, a battery pack 14 is constructed. The interval between the first cell 141 and the second cell 142 can enable the first cell 141 and the second cell 142 to have relatively independent space when heated, which alleviates the degree of heat accumulation and temperature unevenness and reduces the temperature difference inside the battery pack 14.

[0108] According to one embodiment of the present invention, the battery pack 14 further includes an end plate 15, which is disposed at both ends of the battery pack 14. The end plate 15 has a support surface and a mating surface 151 formed on both sides in the thickness direction. The support surface is adapted to fit against the end face of the battery pack 14, and the mating surface 151 is adapted to fit against the partition beam 13. The bottom of the end plate 15 forms a guide surface 152, which is inclined towards the support surface in the direction towards the bottom.

[0109] Specifically, the support surface of the end plate 15 is fitted to the end face of the battery pack 14 to restrict the movement of the battery pack 14 and protect it from external impacts and friction damage. A guide surface 152 is formed at the bottom of the end plate 15. When the battery pack 14 is placed into the battery pack 1, the guide surface 152 of the end plate 15 first contacts the frame 12 of the battery pack 1. Since the guide surface 152 is inclined towards the support surface in the direction towards the bottom, it guides the battery pack 14 smoothly into the battery pack 1 as it is pressed down to move into the battery pack 1. This facilitates the installation of the battery pack 14. Furthermore, the cooperation between the guide surface 152 and the frame 12 of the battery pack 1 generates a clamping force that presses the battery pack 14 tightly, making it more stable and secure within the battery pack 1. After the guide surface 152 disengages from the frame 12, the mating surface 151 contacts and engages with the partition beam 13 to secure the battery pack 14 within the battery pack 1.

[0110] According to one embodiment of the present invention, the battery pack 14 further includes a heating film 16, which extends in a second direction. The heating film 16 is respectively attached to the first battery cell 141 and the second battery cell 142 on both sides in the thickness direction. The two ends of the heating film 16 are respectively fixed to the end plates 15 located at both ends of the battery pack 14.

[0111] Specifically, the heating film 16 is disposed between the first battery cell 141 and the second battery cell 142. The two sides of the heating film 16 in the thickness direction are respectively attached to the first battery cell 141 and the second battery cell 142. The heating film 16 can generate heat to heat the first battery cell 141 and the second battery cell 142 at the same time, improve the heating efficiency of the battery pack 1, and reasonably control the temperature of the battery pack 1. This can extend the service life of the battery pack 1 and maintain battery performance. One heating film 16 can heat two rows of batteries in the battery pack 1, which helps to reduce the number of heating films 16 in the battery pack 1 to optimize the internal space utilization of the battery pack 1, thereby reducing the size and weight of the battery pack 1 and achieving lightweighting of the battery pack 1.

[0112] In some embodiments, the heating film 16 includes a first heating element, a second heating element, and a heat insulation element. The first heating element is attached to and adapted to heat the first battery cell 141; the second heating element is attached to and adapted to heat the second battery cell 142; and the heat insulation element is disposed between the first heating element and the second heating element. By disposing of the heat insulation element between the first heating element and the second heating element, the heat insulation element has the function of heat preservation and insulation, which can reduce the heat loss between the first battery cell 141 and the second battery cell 142. The heat inside the battery pack 1 will be dissipated to the outside more slowly. Therefore, the battery inside the battery pack 1 can maintain a suitable temperature for a long time, and the battery performance is more stable. The heat insulation element can be constructed as heat insulation foam.

[0113] An electrical connector is provided between the first heating element and the second heating element, which connects the first heating element and the second heating element to an external power source to supply power to the heating film 16.

[0114] According to one embodiment of the present invention, a first gap is formed between two adjacent first cells 141 and a second gap is formed between two adjacent second cells 142; a clearance hole 161 is formed on the heating film 16 assembly, with one end of the clearance hole 161 facing the first gap and the other end of the clearance hole 161 facing the second gap.

[0115] By providing a first gap between two adjacent first cells 141 and a second gap between two adjacent second cells 142, the first and second gaps can alleviate the pressure caused by thermal expansion and mechanical deformation between the first cells 141 and the second cells 142, reduce the risk of damage caused by the batteries squeezing each other, and extend the service life of the battery pack 1. By providing a through hole 161 in the first direction on the heating film 16, with one end of the through hole 161 facing the first gap and the other end of the through hole 161 facing the second gap, no heat is generated at the heating door at the through hole 161, and the heat generated by the heating film 16 can be fully transferred to the first cells 141 and the second cells 142, which can reduce the risk of local overheating of the battery and improve the quality and reliability of the battery pack 1.

[0116] According to one embodiment of the present invention, the power distribution box assembly 21 includes a base 211, a first connector 2121, a second connector 2122, a first output copper busbar 2131, and a second output copper busbar 2132. The base 211 extends in a first direction and has a first receiving cavity open to one side, which is adapted to accommodate electrical components. The first connector 2121 and the second connector 2122 respectively connect the electrical components to the positive terminal of one of the battery packs 14 and the negative terminal of the other battery pack 14. The first connector 2121 and the second connector 2122 are respectively disposed at both ends of the base 211 in the first direction. The first output copper busbar 2131 and the second output copper busbar 2132 are respectively connected to the electrical components. The first output copper busbar 2131 and the second output copper busbar 2132 are respectively disposed on the same side of the base 211 in the second direction and located between the first connector 2121 and the second connector 2122.

[0117] The power distribution box assembly 21 is provided with a base 211 as its foundation. A first receiving cavity extending in a first direction and opening to one side is formed within the base 211. This first receiving cavity can accommodate electrical components, facilitating their assembly. A first connector 2121 and a second connector 2122 are provided on the base 211. The first connector 2121 electrically connects the electrical component to the positive terminal of the battery pack 14, and the second connector 2122 electrically connects the electrical component to the negative terminal of the battery pack 14. The arrangement of the first connector 2121 and the second connector 2122 enables the normal use of the electrical components. The first connector 2121 and the second connector 2122 are respectively disposed at both ends of the base 211 in the first direction, that is, the two ends of the power distribution box assembly 21 are respectively connected to the positive and negative terminals of the battery pack 14. Compared with the prior art where the positive and negative terminals of the power distribution box are located on the same side, the first connector 2121 and the second connector 2122 are respectively disposed at both ends of the power distribution box, which makes it easier for the interface of the power distribution box to be closer to the positive and negative terminals of the battery pack 14. This can reduce the length of the wiring between the power distribution box and the positive and negative terminals of the battery pack 14, reduce the complexity of the electrical connection wiring, and make the arrangement of the power distribution box assembly 21 more convenient.

[0118] In addition, the power distribution box assembly 21 is also provided with a first output copper busbar 2131 and a second output copper busbar 2132. The first output copper busbar 2131 and the second output copper busbar 2132 are respectively connected to the positive and negative output terminals of the electrical components. The arrangement of the first output copper busbar 2131 and the second output copper busbar 2132 enables the output terminals of the electrical components to connect with other functional components, facilitating the output work of the electrical components in the first receiving cavity. During assembly, the first output copper busbar 2131 and the second output copper busbar 2132 are respectively arranged on the same side of the base 211 in the second direction and located between the first connector 2121 and the second connector 2122. The first output copper busbar 2131 and the second output copper busbar 2132 arranged on the same side can reduce the space occupancy rate of the power distribution box in the second direction, which facilitates the assembly of the power distribution box assembly 21. At the same time, the first output copper busbar 2131 and the second output copper busbar 2132 are arranged on the same side and between the first connector 2121 and the second connector 2122, which also allows the output structure of the overall power distribution box to connect with other external structures on the same side, making the circuit layout more compact.

[0119] According to one embodiment of the present invention, the power distribution box assembly 21 further includes an upper cover 214, which can be selectively connected to the base 211 to close the first receiving cavity; wherein, the upper cover 214 has a clearance notch 2141 formed thereon, the clearance notch 2141 being configured to correspond one-to-one with the first mounting groove 2151, the second mounting groove 2152, the first connector 2121 and the second connector 2122.

[0120] Since the first receiving cavity is open, the structure of the power distribution box assembly 21 affects the assembly of electrical components. Specifically, the power distribution box assembly 21 is also provided with a top cover 214, which can be selectively connected to the base 211 to close the first receiving cavity after the electrical components are assembled into it, preventing the electrical components from falling out of the first receiving cavity and improving the stability of the electrical component assembly. The top cover 214 is provided with multiple clearance notches 2141, which can avoid the first mounting groove 2151 and the second mounting groove 2152, as well as the first connector 2121 and the second connector 2122 during assembly. The clearance notches 2141 prevent the top cover 214 from interfering with the base 211 or the connection structure of the positive and negative terminals of the electrical components and battery pack 14 during assembly, ensuring the stability of the assembly between the top cover 214 and the base 211.

[0121] According to one embodiment of the present invention, the electrical components include a main fuse 2171, a main relay 2172, a pre-charge resistor 2173, and a pre-charge relay 2174. The main fuse 2171 and the main relay 2172 are disposed on one side of the first receiving cavity in a second direction and are spaced apart on one side of the first direction; the pre-charge resistor 2173 and the pre-charge relay 2174 are disposed on the other side of the first receiving cavity in the second direction and are spaced apart on one side of the first direction. Specifically, the electrical components in the first receiving cavity include the main fuse 2171, the main relay 2172, the pre-charge resistor 2173, and the pre-charge relay 2174. One end of the main fuse 2171 is connected to the positive terminal of the battery pack 14, and the other end of the main fuse 2171 is connected to one end of the main relay 2172, which is connected to the first output copper busbar 2131. One end of the pre-charge resistor 2173 is connected to the other end of the main fuse 2171, and one end of the pre-charge relay 2174 is connected to the other end of the pre-charge resistor 2173. The arrangement of the main fuse 2171, main relay 2172, pre-charge resistor 2173, and pre-charge relay 2174 facilitates the connection between various electrical components within the battery pack 1, thereby improving the safety of the battery pack 1. It is worth noting that the main fuse 2171 and main relay 2172 are located on one side of the first receiving cavity in the second direction and are spaced apart on one side of the first direction; the pre-charge resistor 2173 and pre-charge relay 2174 are located on the other side of the first receiving cavity in the second direction and are spaced apart on one side of the first direction. This can be understood as forming one branch circuit between the main fuse 2171 and main relay 2172, and another branch circuit between the pre-charge resistor 2173 and pre-charge relay 2174. These two branch circuits are respectively arranged on both sides of the first receiving cavity in the second direction. The arrangement of the main fuse 2171, main relay 2172, pre-charge resistor 2173, and pre-charge relay 2174 improves the compactness of the electrical component assembly, reduces the space occupancy rate of the electrical components, and facilitates the assembly of the power distribution box assembly 21.

[0122] According to one embodiment of the present invention, the electrical component further includes a secondary relay 2175, a shunt 2176, a thermal fuse 2177, and a thermal relay 2178. The shunt 2176 and the thermal fuse 2177 are arranged sequentially at intervals in a second direction of the first receiving cavity; the thermal relay 2178 is arranged overlapping the shunt 2176 in a third direction of the first receiving cavity. Specifically, the electrical component also includes a secondary relay 2175, a shunt 2176, a thermal fuse 2177, and a thermal relay 2178, wherein the shunt 2176 and the secondary relay 2175 form a branch circuit and are respectively connected to the negative terminal of the battery pack 14, and the thermal fuse 2177 and the thermal relay 2178 form a branch circuit and are connected to the other end of the precharge relay 2174. During assembly, the shunt 2176 and the heating fuse 2177 are arranged sequentially at intervals in the second direction of the first receiving cavity; the heating relay 2178 is arranged overlapping the shunt 2176 in the third direction of the first receiving cavity, and the auxiliary relay 2175 is arranged at intervals in the first direction from the shunt 2176. The layout of the auxiliary relay 2175, the shunt 2176, the heating fuse 2177, and the heating relay 2178 improves the compactness of the electrical component assembly, reduces the space occupancy rate of the electrical components, and facilitates the assembly of the distribution box assembly 21.

[0123] According to one embodiment of the present invention, a first output copper busbar 2131 extends in a first direction, one end of the first output copper busbar 2131 is connected to a main relay 2172, and the other end of the first output copper busbar 2131 is received in a first mounting groove 2151. Since the first output copper busbar 2131 is a structure disposed within a first receiving cavity and used to connect electrical components, its construction affects its assembly. Specifically, the first output copper busbar 2131 extends in the first direction and is located on one side of the first receiving cavity in a second direction. One end of the first output copper busbar 2131 is connected to the main relay 2172, and the other end of the first output copper busbar 2131 is received in the first mounting groove 2151. During assembly, at least a portion of the first output copper busbar 2131 can overlap with the main relay 2172, improving the overall compactness of the layout. Simultaneously, the extension of the first output copper busbar 2131 in the first direction makes its arrangement more convenient.

[0124] According to one embodiment of the present invention, the second output copper busbar 2132 includes a first plate 21321, a second plate 21322, and a third plate 21323. The first plate 21321 is connected to the auxiliary relay 2175; the second plate 21322 is disposed in the second mounting groove 2152; and the third plate 21323 extends upward from the third side of the first receiving cavity and is respectively connected to the first plate 21321 and the second plate 21322. Since the second output copper busbar 2132 is disposed in the first receiving cavity and is used to connect electrical components, the construction of the second output copper busbar 2132 will affect the assembly of the second output copper busbar 2132. Specifically, the second output copper busbar 2132 is provided with a first plate 21321, a second plate 21322, and a third plate 21323. The first plate 21321 is connected to the auxiliary relay 2175; the second plate 21322 is disposed in the second mounting groove 2152; and the third plate 21323 extends upward from the third side of the first receiving cavity and is connected to the first plate 21321 and the second plate 21322 respectively. The first plate 21321 extends toward the other side of the first receiving cavity in the second direction, and the second plate 21322 extends toward one side of the first receiving cavity in the second direction. That is, the extension directions of the first plate 21321 and the second plate 21322 are opposite. The construction of the first plate 21321 and the second plate 21322 facilitates the connection of electrical components arranged in the first receiving cavity and located on the other side of the second direction to the output structure of the distribution box assembly 21. It is worth noting that the first direction, the second direction, and the third direction are orthogonal to each other. Therefore, the third plate 21323 extends upward in the third direction and connects the first plate 21321 and the second plate 21322, which can improve the compactness of the assembly of the second output copper busbar 2132 with the first receiving cavity and facilitate the assembly of the second output copper busbar 2132.

[0125] In some embodiments, the power distribution box assembly 21 may also be provided with vibration damping pads 2104 to reduce the impact of external vibrations on the power distribution box assembly 21.

[0126] In some embodiments, the power distribution box assembly 21 may also be provided with a top cover 214. The top cover 214 may be selectively connected to the base 211 to close the first receiving cavity after the electrical components are assembled into it, preventing the electrical components from falling out of the first receiving cavity and improving the stability of the electrical component assembly. The top cover 214 is provided with a clearance notch 2141, which may be multiple. During assembly, the clearance notch 2141 can avoid the first mounting groove 2151 and the second mounting groove 2152, as well as the first connector 2121 and the second connector 2122. The clearance notch 2141 prevents the top cover 214 from interfering with the base 211 or the connection structure of the positive and negative terminals of the electrical components and battery pack 14 during assembly, ensuring the stability of the assembly between the top cover 214 and the base 211.

[0127] In some embodiments, the power distribution box assembly 21 may also be provided with a protective cover 216 at each clearance notch 2141. The protective cover 216 can cover the first mounting groove 2151, the second mounting groove 2152, the first connector 2121 and the second connector 2122 when the upper cover 214 is assembled, so as to avoid the first output copper busbar 2131, the second output copper busbar 2132, the first connector 2121 and the second connector 2122 being exposed, thereby improving the safety of the first output copper busbar 2131, the second output copper busbar 2132, the first connector 2121 and the second connector 2122.

[0128] In some embodiments, a first mating part may be formed in the clearance notch 2141, and a second mating part may be formed on the protective cover 216. When the protective cover 216 is assembled, the first mating part and the second mating part can be engaged with each other after sliding engagement. The structure of the first mating part and the second mating part reduces the assembly difficulty of the protective cover 216 and the upper cover 214, and at the same time improves the stability of the protective cover 216 and the upper cover 214 after assembly.

[0129] In some embodiments, the first mating part can be configured as a groove 21411 formed on the inner wall of the clearance notch 2141 and extending in the opening direction of the first receiving cavity, and the second mating part can be configured as a first locking block 2161 formed on the protective cover 216. During assembly, the first locking block 2161 can slide in the groove 21411, that is, the protective cover 216 can be slidably assembled into the clearance notch 2141. The setting of the groove 21411 and the first locking block 2161 reduces the assembly difficulty of the protective cover 216 and the upper cover 214, and realizes the adjustability of the connection between the protective cover 216 and the upper cover 214, so that the protective cover 216 can be adjusted in position according to the structure it covers, so that the protective cover 216 can completely cover the corresponding structure.

[0130] In some embodiments, the slide grooves 21411 can be configured as multiple spaced-apart slide grooves in a first direction or a second direction. Similarly, the first locking block 2161 corresponds one-to-one with the slide grooves 21411, and two adjacent slide grooves 21411 are adapted to cooperate with two sliders on the protective cover 216 to facilitate relative sliding between the protective cover 216 and the upper cover 214. A hook 21412 is provided between two adjacent slide grooves 21411, and a second locking block 2162 is also provided on the protective cover 216. When the first locking block 2161 cooperates with the slide groove 21411, the second locking block 2162 can selectively engage with the hook 21412 to restrict the relative movement between the protective cover 216 and the upper cover 214, so that the protective cover 216 slides out or falls off from the clearance notch 2141. The provision of the second locking block 2162 and the hook 21412 improves the stability of the assembly of the protective cover 216 and the upper cover 214.

[0131] In some embodiments, the upper cover 214 may be provided with a buckle 2142 extending toward the base 211, and the base 211 may be formed with a snap-fit ​​protrusion 2111 that engages with the buckle 2142. The buckle 2142 and the snap-fit ​​protrusion 2111 are respectively constructed as a plurality of one-to-one correspondences. When the upper cover 214 is engaged with the base 211, each buckle 2142 engages with the corresponding snap-fit ​​protrusion 2111 to facilitate the connection between the upper cover 214 and the base 211. The construction of the buckle 2142 and the snap-fit ​​protrusion 2111 improves the stability of the connection between the upper cover 214 and the base 211.

[0132] The vehicle according to the present invention is briefly described below.

[0133] The vehicle according to the present invention includes the battery pack 1 described in any of the above embodiments. Since the vehicle according to the present invention is equipped with the battery pack 1 described in any of the above embodiments, the performance and safety of the vehicle can be improved after the battery pack 1 is assembled with the vehicle, thereby improving the user experience.

[0134] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0135] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0136] In the description of this invention, "a plurality of" means two or more.

[0137] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0138] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0139] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0140] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: The base plate is provided with an inlet, an outlet, and multiple heat exchange zones. Each heat exchange zone is provided with an inlet flow path connected to the inlet, an outlet flow path connected to the outlet, and multiple branch flow paths. The multiple branch flow paths include a first branch flow path, a second branch flow path, and a third branch flow path. The first branch flow path and the second branch flow path are respectively located on both sides of the heat exchange zone in a first direction. Multiple third branch flow paths are constructed to be interconnected, and multiple third branch flow paths are located between the first branch flow path and the second branch flow path. The first branch flow path and the second branch flow path are connected through the multiple third branch flow paths. A frame is provided around the outer periphery of the base plate and defines a cell receiving cavity with the base plate; an electrical connection terminal is provided on the frame. A partition beam is disposed on the base plate and located within the cell receiving cavity. The partition beam is configured as a plurality of beams extending in a first direction and spaced apart in a second direction to define a first cavity and a second cavity. A battery pack, wherein the battery pack is housed in the first cavity and is configured as multiple groups arranged sequentially in a first direction, each battery pack having multiple individual battery cells, the multiple individual battery cells extending in a second direction and arranged sequentially along the first direction; and / or the multiple individual battery cells extending in the first direction and arranged sequentially along the second direction; A power distribution box assembly is disposed in the second cavity, and the power distribution box assembly is electrically connected to multiple battery packs and to the electrical connection terminals respectively; wherein In at least one heat exchange zone, the first branch flow path and the second branch flow path are respectively connected to the inlet flow path, and at least one of the third branch flow paths is connected to the outlet flow path.

2. The battery pack according to claim 1, characterized in that, The partition beam is disposed within the heat exchange zone or located at the edge of the heat exchange zone, and the base plate is adapted to exchange heat with the battery pack.

3. The battery pack according to claim 2, characterized in that, The battery pack is configured as a plurality of cells arranged sequentially in a first direction, and each battery pack is provided with a plurality of individual cells arranged sequentially in a second direction. The multiple heat exchange zones correspond to the multiple battery packs, the upstream end of the branch flow path is connected to the inlet flow path, and the downstream end of the branch flow path is connected to the outlet flow path.

4. The battery pack according to claim 3, characterized in that, In one of the heat exchange zones, a plurality of branch flow paths extend along a first direction and are spaced apart in a second direction. The heat exchange medium in at least one of the branch flow paths flows along the first flow direction, and the heat exchange medium in at least another branch flow path flows along the second flow direction, wherein the first flow direction is opposite to the second flow direction.

5. The battery pack according to claim 4, characterized in that, The plurality of heat exchange zones include: The system comprises a first heat exchange zone, a second heat exchange zone, a third heat exchange zone, and a fourth heat exchange zone. The first heat exchange zone and the second heat exchange zone are spaced apart in a first direction. The first heat exchange zone and the third heat exchange zone are spaced apart in a second direction. The fourth heat exchange zone and the third heat exchange zone are spaced apart in a first direction and the fourth heat exchange zone and the second heat exchange zone are spaced apart in a second direction. The inlet is located in the first heat exchange zone, and the outlet is located in the third heat exchange zone.

6. The battery pack according to claim 5, characterized in that, The water inlet flow path includes: A first inlet flow path, one end of which is connected to the inlet, at least a portion of which is located on the outer periphery of the first heat exchange zone, and the other end of which is connected to the first branch flow path and the second branch flow path of the second heat exchange zone. The second water inlet flow path has one end connected to the water inlet and the other end connected to the first branch flow path and the second branch flow path of the first heat exchange zone. The third water inlet flow path, one end of which is connected to the water inlet, and the other end of which is connected to the first branch flow path of the third heat exchange zone, and / or, the other end of which is connected to the first branch flow path of the fourth heat exchange zone and at least one of the third branch flow paths.

7. The battery pack according to claim 6, characterized in that, The water outlet path includes: The first water outlet path has one end connected to at least one of the third branch paths of the second heat exchange zone, and the other end of the first water outlet path flows sequentially through the outer periphery of the fourth heat exchange zone and the third heat exchange zone and is connected to the water outlet. The second water outlet path has one end connected to at least one of the third branch paths of the first heat exchange zone, and the other end of the second water outlet path flows sequentially through the outer periphery of the second heat exchange zone and the fourth heat exchange zone and is connected to the first water outlet path. The third water outlet path, one end of which is connected to at least one of the third branch paths of the third heat exchange zone, and the other end of which flows through the outer periphery of the third heat exchange zone and is connected to the water outlet. The fourth water outlet path is connected at one end to the second branch path and at least one third branch path of the fourth heat exchange zone, and at the other end of the fourth water outlet path flows sequentially through the outer periphery of the fourth heat exchange zone and the outer periphery of the third heat exchange zone and is connected to the water outlet.

8. The battery pack according to claim 1, characterized in that, The two ends of the partition beam extend to connect with the frame, and the surfaces of two adjacent partition beams facing each other are respectively formed with a first limiting surface and a second limiting surface, and the first limiting surface and the second limiting surface are arranged facing each other in the second direction. in The two ends of the plurality of battery packs respectively abut against the first limiting surface and the second limiting surface, and two adjacent battery packs are spaced apart in the first direction.

9. The battery pack according to claim 8, characterized in that, The battery pack includes: The first battery cell is constructed as a plurality of cells arranged sequentially in a second direction; The second battery cell is constructed as a plurality of cells arranged sequentially in a second direction, with any one of the first battery cell and the second battery cell corresponding to each other in the first direction.

10. The battery pack according to claim 9, characterized in that, Also includes: End plates are disposed at both ends of the battery pack. Each end plate has a supporting surface and a mating surface formed on both sides in the thickness direction. The supporting surface is adapted to fit against the end face of the battery pack, and the mating surface is adapted to fit against the partition beam. The bottom of the end plate forms a guide surface, which is inclined toward the support surface in the direction toward the bottom.

11. The battery pack according to claim 10, characterized in that, The battery pack also includes: A heating film extends in a second direction and is attached to the first battery cell and the second battery cell on both sides in the thickness direction, respectively. The two ends of the heating film are fixed to the end plates located at both ends of the battery pack.

12. The battery pack according to claim 11, characterized in that, A first gap is formed between two adjacent first cells, and a second gap is formed between two adjacent second cells; a clearance hole is formed on the heating film through in a first direction, one end of the clearance hole is directly opposite the first gap, and the other end of the clearance hole is directly opposite the second gap.

13. The battery pack according to claim 1, characterized in that, The power distribution box assembly includes: A base extending in a first direction and having a first receiving cavity open to one side therein, the first receiving cavity being adapted to receive an electrical component; A first connector and a second connector, wherein the first connector and the second connector respectively connect the electrical connection terminal to the positive terminal of one of the battery packs and the negative terminal of the other battery pack, and the first connector and the second connector are respectively disposed at both ends of the base in a first direction; The first output copper busbar and the second output copper busbar are respectively connected to the electrical component. The first output copper busbar and the second output copper busbar are respectively disposed on the same side of the base in the second direction and located between the first connector and the second connector.

14. The battery pack according to claim 13, characterized in that, The base has a first mounting slot and a second mounting slot that are adjacent to each other and open in a second direction. The other end of the first output copper busbar and the other end of the second output copper busbar are respectively received in the first mounting slot and the second mounting slot.

15. The battery pack according to claim 14, characterized in that, The electrical components include: The main fuse and the main relay are disposed on one side of the first receiving cavity in the second direction and are spaced apart on one side in the first direction; A pre-charge resistor and a pre-charge relay are disposed on the other side of the first receiving cavity in the second direction and spaced apart on one side in the first direction.

16. The battery pack according to claim 15, characterized in that, The electrical components also include: A secondary relay, a shunt, and a heating fuse are provided, with the shunt and the heating fuse being spaced apart in a second direction from the first receiving cavity; A heating relay is disposed overlapping the shunt in the third direction of the first receiving cavity.

17. The battery pack according to claim 16, characterized in that, The first output copper busbar extends in a first direction, one end of the first output copper busbar is connected to the main relay, and the other end of the first output copper busbar is received in the first mounting slot.

18. The battery pack according to claim 17, characterized in that, The second output copper busbar includes: The first plate is connected to the auxiliary relay; The second plate is disposed within the second mounting slot; The third plate extends upward from the third side of the first receiving cavity and is connected to the first plate and the second plate respectively.

19. A vehicle, characterized in that, Includes the battery pack described in any one of claims 1-18.

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