Liquid cooling plate, battery pack and battery pack system

Abstract

This invention provides a liquid cooling plate, a battery pack, and a battery pack system. Along the thickness direction of the liquid cooling plate, the liquid cooling plate has a first surface and a second surface arranged opposite each other for heat exchange. There is at least one second surface, and each second surface has a recessed portion. The recessed portion is recessed into the liquid cooling plate in the direction of the first surface, thereby forming two spaced-apart protrusions. The recessed portion penetrates the liquid cooling plate along the first direction to form an exhaust channel for the gas inside the power supply module. The first direction is angled to the thickness direction. The technical solution of this invention solves the problem in existing battery pack systems where the liquid cooling plate of the upper battery pack has a poor cooling effect on the lower battery pack due to the thicker thermally conductive material between the upper and lower battery pack layers.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and more specifically, to a liquid cooling plate, a battery pack, and a battery pack system. Background Technology

[0002] In existing technologies, such as Figures 1 to 3 As shown, a battery pack system typically stacks battery packs 101 together. The upper PACK's cold plate 102 cools the aluminum busbars 103 of the lower PACK's cells. To provide venting channels for the cells 104 in the lower PACK, the distance between the upper battery pack's cold plate 102 and the lower battery pack's aluminum busbars 103 is generally large. The space between the upper and lower battery packs needs to be filled with thermally conductive material 105 to enable heat exchange between the upper battery pack's cold plate 102 and the lower battery pack's aluminum busbars 103. Since the bottom of the battery pack's cold plate 102 is generally flat, and sufficient venting space needs to be left between the vent 106 of the lower cell 104 and the upper cold plate 102, the thermally conductive material 105 becomes relatively thick, resulting in poor thermal conductivity. Utility Model Content

[0003] The main objective of this invention is to provide a liquid cooling plate, a battery pack, and a battery pack system to solve the problem in the prior art where the liquid cooling plate of the upper battery pack has a poor cooling effect on the lower battery pack due to the thicker thermal conductive material between the upper and lower battery pack layers.

[0004] To achieve the above objectives, this utility model provides a liquid cooling plate. Along the thickness direction of the liquid cooling plate, the liquid cooling plate has a first surface and a second surface that are arranged opposite to each other and used for heat exchange. There is at least one second surface. Each second surface is provided with a recessed portion. The recessed portion is recessed into the liquid cooling plate in the direction of the first surface so as to form two convex portions that are spaced apart. The recessed portion penetrates the liquid cooling plate along the first direction to form an exhaust channel for the gas inside the power supply module to be discharged. The first direction is set at an angle to the thickness direction.

[0005] Further, the liquid cooling plate includes: an upper liquid cooling component, the upper surface of which forms a first surface; at least one lower liquid cooling component disposed below the upper liquid cooling component, the lower surface of which forms a second surface; and a flow channel separating component disposed between the upper liquid cooling component and the lower liquid cooling component, the upper liquid cooling component and the flow channel separating component forming an upper flow channel, and the lower liquid cooling component and the flow channel separating component forming at least one lower flow channel.

[0006] Furthermore, the lower liquid cooling component includes two lower liquid cooling elements spaced apart along the second direction. The lower liquid cooling elements and the flow channel separating component form a lower flow channel, which extends along the first direction. The lower liquid cooling elements form a protrusion, and the gap between the two lower liquid cooling elements forms a recess.

[0007] Furthermore, the lower liquid cooling component also includes a sealing component. Along the first direction, the two ends of the lower liquid cooling component are respectively sealed with sealing components to seal the two ends of the lower flow channel.

[0008] Furthermore, the flow channel partition member is provided with at least two connecting parts, and the at least two connecting parts are respectively provided with at least two lower liquid cooling components. The connecting part includes two connecting holes, and the two connecting holes are spaced apart along the first direction to connect the at least two lower flow channels with the upper flow channels respectively.

[0009] Furthermore, there are multiple lower liquid cooling components, which are spaced apart along the second direction.

[0010] Furthermore, the upper liquid cooling component includes: an upper liquid cooling element, which, together with the flow channel partitioning element, forms a flow channel chamber, and the side of the upper liquid cooling element facing away from the flow channel partitioning element is provided with an inlet and an outlet; and multiple partitioning elements, located within the flow channel chamber, which are spaced apart along a second direction to divide the flow channel chamber into multiple upper flow channels that are connected in sequence.

[0011] According to another aspect of the present invention, the present invention provides a battery pack, comprising: a battery box, including the aforementioned liquid cooling plate and a plurality of side plates, the plurality of side plates being connected to the periphery of the liquid cooling plate to form an accommodating space for accommodating a battery module; and a battery module, wherein at least one battery module is disposed within the accommodating space, and a first surface is used for heat exchange with the bottom of the at least one battery module.

[0012] According to another aspect of the present invention, the present invention provides a battery pack system, comprising: a plurality of the above-described battery packs, wherein the plurality of battery packs are arranged sequentially along the thickness direction, and the second surface of the upper battery pack in two adjacent battery packs is used for heat exchange with the battery module of the lower battery pack in two adjacent battery packs; wherein the protrusion of the upper battery pack is correspondingly arranged with the busbar of the lower battery pack, and the exhaust port of the lower battery pack is connected to the exhaust channel of the upper battery pack.

[0013] Furthermore, a thermally conductive material is provided between the protrusion and the busbar.

[0014] By applying the technical solution of this utility model, in a battery pack system, compared to the prior art which requires filling a thicker thermally conductive material between the upper and lower battery packs, this application, by providing a recessed portion on the second surface of the liquid cooling plate and forming two spaced protrusions, aligns the two protrusions of the upper battery pack's liquid cooling plate with the two busbars of the lower battery pack's battery module. This reduces the distance between the upper battery pack's liquid cooling plate and the lower battery pack's busbars, thereby reducing the amount of thermally conductive material between them, lowering thermal resistance, and improving the efficiency of heat transfer between multiple battery packs. Furthermore, the recessed portion penetrates the liquid cooling plate along the first direction, forming an exhaust channel for the gas inside the power cell module to be discharged. Thus, while ensuring sufficient exhaust space between the lower battery pack's exhaust port and the upper cooling plate (i.e., ensuring that the gas generated inside the battery module can still be freely discharged), the two protrusions solve the problem of poor cooling of the lower battery pack's busbars by the upper battery pack's liquid cooling plate. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of a prior art battery pack system is shown;

[0017] Figure 2 It shows Figure 1 A cross-sectional view of the battery pack system;

[0018] Figure 3 It shows Figure 2 A magnified view of a portion of the battery pack system;

[0019] Figure 4 A schematic diagram of an embodiment of the battery pack system of this utility model is shown;

[0020] Figure 5 It shows Figure 4 A cross-sectional view of the battery pack system;

[0021] Figure 6 It shows Figure 5 A magnified view of a portion of the battery pack system;

[0022] Figure 7 It shows Figure 4 A schematic diagram of the battery pack structure of the battery pack system.

[0023] The above figures include the following reference numerals:

[0024] 1. Liquid cooling plate; 2. Side plate; 3. Battery module; 4. Busbar; 5. Exhaust port; 6. Thermal conductive material; 7. Battery pack; 8. Battery box; 9. Thermal conductive component; 11. First surface; 12. Second surface; 13. Recess; 15. Upper flow channel; 16. Lower flow channel; 20. Upper liquid cooling component; 21. Upper liquid cooling component; 22. Separator; 23. Liquid inlet; 24. Liquid outlet; 30. Lower liquid cooling component; 31. Sealing component; 32. Lower liquid cooling component; 40. Flow channel separator; 41. Connecting hole. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] To address the problem in existing battery pack systems where the thicker thermally conductive material between the upper and lower battery pack layers results in poor cooling of the lower battery pack by the liquid cooling plate of the upper battery pack, such as... Figures 4 to 7 As shown, embodiments of this utility model provide a liquid cooling plate, a battery pack, and a battery pack system.

[0027] like Figure 4 and Figure 5 As shown, an embodiment of the present invention provides a battery pack system, which includes multiple battery packs 7 arranged sequentially along the thickness direction.

[0028] like Figure 7 As shown, an embodiment of this utility model provides a battery pack, which includes a battery box 8 and battery modules 3. The battery box 8 includes a liquid cooling plate 1 and multiple side plates 2. The multiple side plates 2 are connected to the periphery of the liquid cooling plate 1 to form an accommodating space for accommodating the battery modules 3. At least one battery module 3 is disposed in the accommodating space. The liquid cooling plate 1 is in contact with the bottom of the battery module 3 above it and with the busbar (aluminum busbar) of the battery module 3 below it. In this way, the liquid cooling plate 1 at the bottom of the battery pack can cool the upper battery cells and the aluminum busbar of the lower battery cells, thereby improving the cooling effect.

[0029] The liquid cooling plate, battery pack, and battery pack system will be described in detail below.

[0030] It should be noted that the battery pack system includes multiple battery packs 7 arranged sequentially along the thickness direction. For ease of description, the upper battery pack 7 among two adjacent battery packs 7 is the upper battery pack, and the lower battery pack 7 among two adjacent battery packs 7 is the lower battery pack. The liquid cooling plate of the upper battery pack can dissipate heat from the bottom of the battery module of the upper battery pack (i.e., the battery pack where the liquid cooling plate is located) and can also dissipate heat from the top busbar of the lower battery pack.

[0031] It should be noted that, as Figure 4 As shown, the first direction, the second direction, and the thickness direction are arranged at an angle to each other, and preferably, the first direction, the second direction, and the thickness direction are arranged perpendicular to each other.

[0032] like Figures 4 to 7 As shown, an embodiment of this utility model provides a liquid cooling plate. Along the thickness direction of the liquid cooling plate 1, the liquid cooling plate 1 has a first surface 11 and a second surface 12 that are arranged opposite each other and used for heat exchange. There is at least one second surface 12, and each second surface 12 is provided with a recess 13. The recess 13 is recessed into the liquid cooling plate 1 in the direction of the first surface 11 so as to form two protrusions that are spaced apart. The recess 13 penetrates the liquid cooling plate 1 along a first direction to form an exhaust channel for the gas inside the power supply module to be discharged. The first direction is set at an angle to the thickness direction.

[0033] In the above technical solution, compared with the prior art which requires filling a thicker thermally conductive material between the upper and lower battery packs, this application provides a recessed portion 13 on the second surface 12 of the liquid cooling plate 1, and forms two spaced protrusions. This allows the two protrusions of the liquid cooling plate 1 of the upper battery pack to correspond with the two busbars 4 of the battery module 3 of the lower battery pack, thereby reducing the distance between the liquid cooling plate 1 of the upper battery pack 7 and the busbars 4 of the lower battery pack 7. This reduces the distance between the liquid cooling plate 1 of the upper battery pack 7 and the busbars 4 of the lower battery pack 7. The thermally conductive material between the busbars of the battery pack reduces thermal resistance and improves the efficiency of heat transfer between multiple battery packs. Furthermore, the recessed portion 13 penetrates the liquid cooling plate 1 along the first direction, forming an exhaust channel for the gas inside the power cell module. In this way, while ensuring sufficient exhaust space between the exhaust port of the lower battery pack and the upper cold plate (i.e., ensuring that the gas generated inside the battery module can still be freely discharged), the two protrusions can solve the problem of poor cooling of the busbars of the lower battery pack by the liquid cooling plate 1 of the upper battery pack.

[0034] In some embodiments, such as Figure 6 As shown, the first surface 11 of the liquid cooling plate of the upper battery pack is used to exchange heat with the bottom of at least one battery module 3 of the upper battery pack (i.e., the battery pack layer where the liquid cooling plate is located).

[0035] In some embodiments, such as Figure 6 As shown, the liquid cooling plate includes: an upper liquid cooling component 20, the upper surface of which forms a first surface 11; at least one lower liquid cooling component 30 disposed below the upper liquid cooling component 20, the lower surface of which forms a second surface 12; and a flow channel separating component 40 disposed between the upper liquid cooling component 20 and the lower liquid cooling component 30, the upper liquid cooling component 20 and the flow channel separating component 40 forming an upper flow channel 15, and the lower liquid cooling component 30 and the flow channel separating component 40 forming at least one lower flow channel 16.

[0036] With the above configuration, the coolant passing through the upper flow channel 15 can exchange heat with the battery module 3 on the first surface 11, and the coolant passing through the lower flow channel 16 can exchange heat with the aluminum busbar of the battery module 3 in the lower battery pack through the second surface 12, thereby achieving heat dissipation for the two adjacent battery packs respectively; at the same time, the flow channel partition member 40 can increase the strength of the liquid cooling plate 1.

[0037] It should be noted that the protrusion has a lower flow channel 16, and the side of the protrusion facing the lower battery pack forms a partial second surface.

[0038] In some embodiments, such as Figure 5 As shown, the accommodating space contains multiple battery modules 3, and there are multiple lower liquid cooling components 30. The multiple lower liquid cooling components 30 are spaced apart along the second direction, and the multiple lower liquid cooling components 30 are corresponding to the multiple battery modules 3. In this way, the liquid cooling plate 1 has multiple second surfaces 12, which can dissipate heat from the multiple battery modules 3. The two protrusions corresponding to each second surface 12 can exchange heat with the two busbars of each battery module 3.

[0039] In some embodiments, a battery module 3 is provided in the accommodating space, and a lower liquid cooling component 30 is provided. Thus, the liquid cooling plate 1 has a second surface 12, which can exchange heat between the two busbars of a battery module 3.

[0040] In some embodiments, such as Figure 6 and Figure 7 As shown, the lower liquid cooling component 30 includes two lower liquid cooling elements 32 spaced apart along the second direction. The lower liquid cooling elements 32 and the flow channel separating component 40 form a lower flow channel 16. The lower flow channel 16 extends along the first direction. The lower liquid cooling elements 32 form a protrusion, and the gap between the two lower liquid cooling elements 32 forms a recess 13.

[0041] With the above configuration, the two lower liquid cooling components 32 can form two protrusions, which exchange heat with the two busbars of the lower battery pack respectively. The gap between the two lower liquid cooling components 32 can form an exhaust channel so that the lower battery pack has sufficient exhaust space.

[0042] In some embodiments, the lower liquid cooling component 30 may also include a main liquid cooling component and two branch liquid cooling components that communicate internally with the main liquid cooling component. The main liquid cooling component is connected to the side of the flow channel partition 40 opposite to the upper liquid cooling component 20, and the two branch liquid cooling components are located on the side of the main liquid cooling component opposite to the flow channel partition 40. The two branch liquid cooling components form two protrusions, thereby increasing the cross-sectional area of ​​the lower flow channel 16 for the coolant to flow through.

[0043] In some embodiments, such as Figure 7 As shown, the lower liquid cooling component 30 also includes a sealing component 31. Along the first direction, the two ends of the lower liquid cooling component 32 are respectively sealed with the sealing component 31 to seal the two ends of the lower flow channel 16. By setting the sealing component 31, the closed circulation of coolant in the lower flow channel 16 can be ensured, avoiding leakage and contamination.

[0044] In some embodiments, such as Figure 6 As shown, the cross-section of the lower liquid cooling component 32 is U-shaped.

[0045] In some embodiments, such as Figure 7 As shown, the flow channel partition member 40 is provided with at least two connecting portions, which are respectively arranged in a one-to-one correspondence with at least two lower liquid cooling components 32. Each connecting portion includes two connecting holes 41, which are spaced apart along a first direction to connect the at least two lower flow channels 16 to the upper flow channels 15. The connecting holes 41 enable coolant circulation between the lower flow channels 16 and the upper flow channels 15, thereby improving the utilization rate and cooling effect of the coolant. This allows the coolant to be evenly distributed throughout the entire liquid cooling plate 1, providing comprehensive cooling for the upper and lower layers of the battery cells.

[0046] In some embodiments, such as Figure 7 As shown, the upper liquid cooling component 20 includes: an upper liquid cooling component 21, which, together with the flow channel partition component 40, forms a flow channel chamber. The upper liquid cooling component 21 has an inlet 23 and an outlet 24 on the side facing away from the flow channel partition component 40; and a plurality of partitions 22, located within the flow channel chamber. The plurality of partitions 22 are spaced apart along a second direction to divide the flow channel chamber into a plurality of sequentially connected upper flow channels 15.

[0047] In the above technical solution, the flow channel chamber is divided into multiple independent but interconnected upper flow channels 15 by the setting of the separator 22, so that the coolant forms an orderly flow path in the upper flow channel 15, thereby improving the cooling efficiency and uniformity.

[0048] In some embodiments, both the inlet 23 and the outlet 24 are connected to the flow channel chamber. Coolant enters the liquid cooling plate through the inlet 23 and flows out of the liquid cooling plate through the outlet 24. The coolant includes, but is not limited to, water.

[0049] In some embodiments, such as Figure 4 and Figure 5 As shown, in the battery pack system, multiple battery packs are stacked sequentially. The liquid cooling plate 1 of the upper battery pack is close to the upper edge of the lower battery pack. Each battery module 3 has two busbars 4 spaced apart on its top, and an exhaust port 5 is provided between the two busbars 4. The second surface 12 of the upper battery pack 7 in two adjacent battery packs 7 is used for heat exchange with the battery module 3 of the lower battery pack 7 in two adjacent battery packs 7. The protrusion of the upper battery pack 7 is correspondingly arranged with the busbar 4 of the lower battery pack 7, and the exhaust port 5 of the lower battery pack 7 is connected to the exhaust channel of the upper battery pack 7.

[0050] In the above technical solution, heat dissipation inside the battery pack system is achieved through the stacking and heat exchange of multiple battery packs 7, while the effective discharge of gas inside the system is ensured through the connection of exhaust port 5 and exhaust channel.

[0051] In some embodiments, such as Figure 6 As shown, a thermally conductive material 6 is provided between the protrusion and the busbar 4, wherein the thermally conductive material 6 includes, but is not limited to, thermally conductive adhesive. In this way, the provision of the thermally conductive material 6 can realize heat conduction between the protrusion and the busbar 4.

[0052] In some embodiments, the upper liquid cooling component 20, the plurality of lower liquid cooling components 30, and the flow channel partition component 40 are integrally formed or separately formed.

[0053] In some embodiments, such as Figure 6 As shown, a heat-conducting component 9 is provided between the first surface 11 and the battery module 3. In this way, a heat conduction channel is established between the wall of the upper liquid cooling component 20 and the battery module 3 above it through the heat-conducting component 9 to cool the battery module 3. The heat-conducting component 9 includes, but is not limited to, thermally conductive adhesive.

[0054] In some embodiments, such as Figure 5 As shown, the battery pack system also includes a liquid cooling cover plate, which is installed over the opening of the battery box of the uppermost battery pack among the multiple battery packs. The liquid cooling cover plate has the same structure as the liquid cooling plate 1. In this way, the busbar of the battery module of the uppermost battery pack can also dissipate heat, and the exhaust port of the battery module of the uppermost battery pack can also exhaust.

[0055] In existing technologies, multiple battery packs are vertically stacked to form a larger battery pack system. To connect the upper and lower battery packs, support blocks are usually provided on both sides of the battery box. Bolts or other fasteners are installed on the support blocks to fix the two adjacent battery packs, thereby realizing the stacking of multiple battery packs. However, the support blocks need to be relatively wide to provide enough space for bolt installation, which results in a lower energy density of the battery pack system. In this application, multiple battery packs can be stacked in combination with brackets. This eliminates the need for support blocks and allows multiple battery packs to be stacked vertically, thereby occupying less space and increasing the energy density of the battery pack system.

[0056] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: In the battery pack system, compared with the prior art which requires filling a thicker thermally conductive material between the upper and lower battery packs, in this application, by providing a recessed portion on the second surface of the liquid cooling plate and forming two spaced protrusions, the two protrusions of the liquid cooling plate of the upper battery pack can correspond to the two busbars of the battery module of the lower battery pack, thereby reducing the distance between the liquid cooling plate of the upper battery pack and the busbars of the lower battery pack. This reduces the distance between the upper battery pack and the lower battery pack. The thermally conductive material between the liquid cooling plate of the battery pack and the busbar of the lower battery pack reduces thermal resistance, thereby improving the efficiency of heat transfer between multiple battery packs. Moreover, the recessed portion penetrates the liquid cooling plate along the first direction, forming an exhaust channel for the gas inside the power cell module to be discharged. In this way, while ensuring that there is sufficient exhaust space between the exhaust port of the lower battery pack and the upper cooling plate (i.e., ensuring that the gas generated inside the battery module can still be discharged freely), the setting of the two protrusions can solve the problem of poor cooling of the busbar of the lower battery pack by the liquid cooling plate of the upper battery pack.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid-cooled plate, characterized in that, Along the thickness direction of the liquid cooling plate (1), the liquid cooling plate (1) has a first surface (11) and a second surface (12) arranged opposite to each other for heat exchange. There is at least one second surface (12), and each second surface (12) is provided with a recess (13). The recess (13) is recessed into the liquid cooling plate (1) in the direction of the first surface (11) so as to form two protrusions arranged at intervals. The recess (13) extends through the liquid cooling plate (1) in a first direction to form an exhaust channel for the gas inside the power supply module to be discharged, wherein the first direction is set at an angle to the thickness direction.

2. The liquid cold plate of claim 1, wherein, The liquid cooling plate (1) includes: Upper liquid cooling component (20), the upper surface of which forms the first surface (11); At least one lower liquid cooling component (30) is disposed on the lower side of the upper liquid cooling component (20), and the lower surface of the lower liquid cooling component (30) forms the second surface (12). A flow channel separating member (40) is disposed between the upper liquid cooling member (20) and the lower liquid cooling member (30). The upper liquid cooling member (20) and the flow channel separating member (40) form an upper flow channel (15), and the lower liquid cooling member (30) and the flow channel separating member (40) form at least one lower flow channel (16).

3. The liquid cold plate of claim 2, wherein, The lower liquid cooling component (30) includes two lower liquid cooling elements (32) spaced apart along a second direction. The lower liquid cooling elements (32) and the flow channel separating component (40) form the lower flow channel (16). The lower flow channel (16) extends along the first direction. The lower liquid cooling elements (32) form the protrusion, and the gap between the two lower liquid cooling elements (32) forms the recess (13).

4. The liquid cold plate of claim 3, wherein, The lower liquid cooling component (30) further includes a sealing component (31). Along the first direction, the two ends of the lower liquid cooling component (32) are respectively sealed with the sealing component (31) to seal the two ends of the lower flow channel (16).

5. The liquid cold plate of claim 3, wherein, The flow channel partition member (40) is provided with at least two connecting parts, and the at least two connecting parts are respectively provided with at least two lower liquid cooling components (32). The connecting part includes two connecting holes (41), and the two connecting holes (41) are spaced apart along the first direction to connect the at least two lower flow channels (16) with the upper flow channel (15) respectively.

6. The liquid cold plate of any of claims 2-5, wherein, There are multiple lower liquid cooling components (30), and the multiple lower liquid cooling components (30) are spaced apart along the second direction.

7. The liquid cold plate of any of claims 2-5, wherein, The upper liquid-cooled component (20) includes: The upper liquid cooling component (21) and the flow channel partition component (40) form a flow channel chamber. The upper liquid cooling component (21) has an inlet (23) and an outlet (24) on the side away from the flow channel partition component (40). Multiple partitions (22) are located within the flow channel chamber, and the multiple partitions (22) are spaced apart along the second direction to divide the flow channel chamber into multiple upper flow channels (15) that are connected in sequence.

8. A battery pack, characterized by, include: The battery box (8) includes a liquid cooling plate (1) according to any one of claims 1 to 7 and a plurality of side plates (2), the plurality of side plates (2) being connected to the periphery of the liquid cooling plate (1) to form an accommodating space for accommodating the battery module (3); A battery module (3) is provided in the accommodating space, and the first surface (11) is used to exchange heat with the bottom of the at least one battery module (3).

9. A battery pack system, characterized by, include: The battery pack (7) according to multiple claims 8, wherein multiple battery packs (7) are arranged sequentially along the thickness direction, and the second surface (12) of the upper battery pack (7) of two adjacent battery packs (7) is used to exchange heat with the battery module (3) of the lower battery pack (7) of the two adjacent battery packs (7); The protrusion of the upper battery pack (7) is correspondingly provided with the busbar (4) of the lower battery pack (7), and the exhaust port (5) of the lower battery pack (7) is connected to the exhaust channel of the upper battery pack (7).

10. The battery pack system of claim 9, wherein, A thermally conductive material (6) is provided between the protrusion and the busbar (4).

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