Battery pack

Abstract

The utility model discloses a battery pack which comprises a first battery pack, a second battery pack and an exhaust pipeline, and the first battery pack and the second battery pack are spaced along a first direction; the exhaust pipeline is located between the first battery pack and the second battery pack, and an exhaust channel is formed in the exhaust pipeline and communicates with the first battery pack and the second battery pack. According to the battery pack disclosed by the utility model, the battery pack comprises the first battery pack, the second battery pack and the exhaust pipeline, the exhaust pipeline is positioned between the first battery pack and the second battery pack, and when the first battery pack and the second battery pack are slightly thermally runaway, high-temperature gas of the first battery pack and the second battery pack can be exhausted through the exhaust channel; the influence on surrounding battery packs is small, other battery packs cannot be polluted and influenced, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0002] With the continuous development of the battery industry, lithium-ion batteries, with their high energy density, are widely used in the field of power batteries to provide power for vehicle operation. Battery explosion-proof valves play a crucial role in the safety of battery cells. In the event of minor thermal runaway or other problems within a battery cell, the explosion-proof valve opens promptly by sensing changes in internal pressure to release gas and prevent risks such as cell explosion or fire. However, the gas released through the battery explosion-proof valve can affect surrounding battery modules, causing secondary damage to the batteries. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a battery pack in which an exhaust pipe is located between a first battery pack and a second battery pack. When the first and second battery packs experience minor thermal runaway, the high-temperature gases from these battery packs can be discharged through the exhaust pipe, minimizing the impact on surrounding battery packs and reducing maintenance costs.

[0004] A battery pack according to an embodiment of the present invention includes: a first battery pack; a second battery pack, the first battery pack and the second battery pack being spaced apart along a first direction; and an exhaust pipe located between the first battery pack and the second battery pack, the exhaust pipe having an exhaust channel that is connected to both the first battery pack and the second battery pack.

[0005] According to an embodiment of the present invention, the battery pack includes a first battery pack, a second battery pack, and an exhaust pipe. The exhaust pipe is located between the first battery pack and the second battery pack. When the first battery pack and the second battery pack experience slight thermal runaway, the high-temperature gas from the first battery pack and the second battery pack can be discharged through the exhaust pipe, which has little impact on the surrounding battery packs and will not pollute or affect other battery packs, thus reducing maintenance costs.

[0006] According to some embodiments of the present invention, the first battery pack includes a plurality of first battery modules arranged along a second direction, and the exhaust pipe further includes a main pipe and a plurality of first exhaust pipes connected to the main pipe, wherein the plurality of first exhaust pipes correspond one-to-one with and are connected to the plurality of first battery modules; the second battery pack includes a plurality of second battery modules arranged along the second direction, and the exhaust pipe further includes a plurality of second exhaust pipes connected to the main pipe, wherein the plurality of second exhaust pipes correspond one-to-one with and are connected to the plurality of second battery modules, wherein the first direction is perpendicular to the second direction.

[0007] According to some embodiments of the present invention, each of the first battery modules has a first explosion-proof valve, and the first explosion-proof valve and the first exhaust pipe are respectively located on opposite sides of the first battery module in the first direction;

[0008] Each of the second battery modules has a second explosion-proof valve, and the second explosion-proof valve and the second exhaust pipe are located on opposite sides of the second battery module in the first direction.

[0009] According to some embodiments of the present invention, the first battery pack further includes: a first heat insulation pad, the first heat insulation pad being located between two adjacent first battery modules; the second battery pack further includes: a second heat insulation pad, the second heat insulation pad being located between two adjacent second battery modules.

[0010] According to some embodiments of the present invention, the battery pack further includes: a liquid cooling plate, the liquid cooling plate being located on one side of the first battery pack and the second battery pack in a third direction, the liquid cooling plate including an inlet pipe and an outlet pipe, the inlet pipe and the outlet pipe being located between the first battery pack and the second battery pack, the two ends of the liquid cooling plate along the second direction being a first end and a second end respectively, the inlet pipe and the outlet pipe being disposed adjacent to the first end, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0011] According to some embodiments of the present invention, the battery pack further includes: a first electrical connector, the first electrical connector being located between the first battery pack and the second battery pack, the first electrical connector being used to electrically connect the first battery module and the second battery module located at the same end of the liquid cooling plate, the first electrical connector being disposed adjacent to the second end.

[0012] According to some embodiments of the present invention, the battery pack further includes: a BMS slave board, which is located between the first battery pack and the second battery pack, and between the liquid inlet pipe, the liquid outlet pipe and the exhaust pipe.

[0013] According to some embodiments of the present invention, the exhaust pipe has an exhaust port, which is disposed adjacent to the first end.

[0014] According to some embodiments of the present invention, the first battery pack further includes a second electrical connector and a third electrical connector, wherein the second electrical connector is electrically connected between two adjacent first battery modules, and the third electrical connector is electrically connected between two adjacent second battery modules.

[0015] According to some embodiments of the present invention, both the second electrical connector and the third electrical connector include an electrical connector plate and a first side plate and a second side plate connected to both sides of the electrical connector plate in a second direction. The dimension of the electrical connector plate in a third direction is larger than the dimensions of the first side plate and the second side plate in the third direction.

[0016] Additional aspects and advantages of this 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

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a perspective view of a battery pack according to some embodiments of the present invention;

[0019] Figure 2 yes Figure 1 Top view of the battery pack;

[0020] Figure 3 yes Figure 1 A schematic diagram showing the first battery module being separated from the battery pack;

[0021] Figure 4 yes Figure 1 Diagram showing the connection between the first battery pack and the liquid cooling plate;

[0022] Figure 5 yes Figure 1 Side view of the battery pack;

[0023] Figure 6 yes Figure 1 A side view of the battery pack from another angle.

[0024] Figure label:

[0025] 100. Battery pack;

[0026] 10. First battery pack; 1. First battery module; 11. First explosion-proof valve; 12. Second electrical connector; 121. Electrical connection plate; 122. First side plate; 123. Second side plate;

[0027] 20. Second battery pack; 2. Second battery module; 21. Third electrical connector;

[0028] 30. Exhaust pipe; 31. Main pipe; 32. First exhaust pipe; 33. Second exhaust pipe; 34. Exhaust port;

[0029] 40. Liquid cooling plate; 41. Liquid inlet pipe; 42. Liquid outlet pipe; 43. First end; 44. Second end;

[0030] 51. First electrical connector; 52. BMS slave board. Detailed Implementation

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0033] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] The following is for reference. Figures 1-6 A battery pack 100 according to an embodiment of the present invention is described.

[0035] According to an embodiment of the present invention, the battery pack 100 includes a first battery group 10 and a second battery group 20, the first battery group 10 and the second battery group 20 being aligned along a first direction (e.g., referring to the attached diagram). Figure 1 The first battery pack 10 includes components spaced apart along the e1 direction (e.g., see attached diagram). Figure 1The first battery module 1 is arranged in the e2 direction (in the second direction), and the first battery module 1 is connected in series. Each first battery module 1 includes multiple battery cells, and the battery cells are connected in parallel. The second battery pack 20 includes multiple second battery modules 2 arranged in the second direction, and the second battery modules 2 are connected in series. Each second battery module 2 includes multiple battery cells, and the battery cells are connected in parallel. For example, the parallel design of the battery cells results in lower voltage and reduces the likelihood of short circuits and arcing.

[0036] The battery pack 100 also includes an exhaust pipe 30, which is located between the first battery pack 10 and the second battery pack 20. The exhaust pipe 30 has an exhaust channel that is connected to both the first battery pack 10 and the second battery pack 20. One end of the exhaust pipe 30 is sealed, and the other end is connected to the exhaust port of the battery pack 100. When the first battery pack 10 and the second battery pack 20 experience minor thermal runaway, the high-temperature gases from the first battery pack 10 and the second battery pack 20 can be discharged through the exhaust channel, minimizing the impact on surrounding battery packs and preventing contamination of other battery packs, thus reducing maintenance costs. If an explosion-proof valve is used for venting, some contaminants may splash onto adjacent battery packs, potentially contaminating them.

[0037] According to an embodiment of the present invention, the battery pack 100 includes a first battery pack 10, a second battery pack 20, and an exhaust pipe 30. The exhaust pipe 30 is located between the first battery pack 10 and the second battery pack 20. When the first battery pack 10 and the second battery pack 20 experience slight thermal runaway, the high-temperature gas from the first battery pack 10 and the second battery pack 20 can be discharged through the exhaust pipe, which has a small impact on the surrounding battery packs and will not pollute or affect other battery packs, thus reducing maintenance costs.

[0038] According to some embodiments of the present invention, referring to Figure 1-Figure 4 The first battery pack 10 includes a plurality of first battery modules 1 arranged along a second direction. The exhaust pipe 30 also includes a main pipe 31 and a plurality of first exhaust pipes 32. The plurality of first exhaust pipes 32 are all connected to the main pipe 31, and each of the plurality of first exhaust pipes 32 corresponds to and is connected to a plurality of first battery modules 1. When a first battery module 1 experiences a slight thermal runaway, the high-temperature gas inside the first battery module 1 can be transported to the main pipe 31 through the corresponding first exhaust pipe 32, and discharged to the outside of the battery pack 100 through the main pipe 31. This can prevent the high-temperature gas inside the first battery module 1 that has experienced thermal runaway from damaging adjacent first battery modules 1.

[0039] When the first battery module 1 experiences minor thermal runaway, if the pressure inside the first battery module 1 does not exceed the limit of the explosion-proof valve, high-temperature gas will accumulate in the first battery module 1, potentially damaging it. As time progresses, more and more high-temperature gas accumulates inside the first battery module 1. If the pressure inside the first battery module 1 exceeds the limit of the explosion-proof valve, the explosion-proof valve will automatically open to release gas, preventing the first battery module 1 from exploding. This would cause irreversible damage to the first battery module 1. Using the first exhaust pipe 32 to promptly release the high-temperature gas from the first battery module 1 can increase the safety of the first battery module 1.

[0040] The second battery pack 20 includes a plurality of second battery modules 2 arranged along a second direction. The exhaust pipe 30 also includes a plurality of second exhaust pipes 33 connected to the main pipe 31. Each of the plurality of second exhaust pipes 33 corresponds to and is connected to a plurality of second battery modules 2, wherein the first direction is perpendicular to the second direction. When a second battery module 2 experiences a minor thermal runaway, the high-temperature gas inside the second battery module 2 can be transported to the main pipe 31 through the corresponding second exhaust pipe 33 and discharged to the outside of the battery pack 100 through the main pipe 31. This can prevent the high-temperature gas inside the second battery module 2 experiencing thermal runaway from damaging adjacent second battery modules 2.

[0041] When the second battery module 2 experiences minor thermal runaway, if the pressure inside the second battery module 2 does not exceed the limit of the explosion-proof valve, high-temperature gas will accumulate in the second battery module 2, causing damage. As time progresses, more and more high-temperature gas accumulates inside the second battery module 2. If the pressure inside the second battery module 2 exceeds the limit of the explosion-proof valve, the explosion-proof valve will automatically open to release gas to prevent the second battery module 2 from exploding, which would cause irreversible damage to the second battery module 2. Using a second exhaust pipe 33 to promptly release the high-temperature gas inside the second battery module 2 can increase the safety of the second battery module 2.

[0042] By designing multiple battery cells into multiple independent battery modules, thermal runaway is controlled within the battery module, resulting in higher safety. When one of the battery modules malfunctions, only the corresponding battery module can be removed and replaced.

[0043] According to some embodiments of the present invention, referring to Figure 1 , Figure 3Each first battery module 1 has a first explosion-proof valve 11, and the first explosion-proof valve 11 and the first exhaust pipe 32 are located on opposite sides of the first battery module 1 in a first direction. In the event of a strong thermal runaway in the first battery module 1, the high-temperature gas inside the first battery module 1 can be discharged through the first explosion-proof valve 11, improving the safety of the battery pack 100. The first explosion-proof valve 11 is located at the edge of the battery pack 100. In the event of thermal runaway in the first battery module 1, the high-temperature gas is directly discharged through the exhaust port at the edge of the battery pack 100, further reducing the impact of thermal runaway on surrounding first battery modules 1.

[0044] Each second battery module 2 has a second explosion-proof valve, and the second explosion-proof valve and the second exhaust pipe 33 are located on opposite sides of the second battery module 2 in a first direction. The second explosion-proof valve is located at the edge of the battery pack 100. In the event of thermal runaway of the second battery module 2, high-temperature gas is directly discharged through the exhaust port at the edge of the battery pack 100, further reducing the impact of thermal runaway of the second battery module 2 on the surrounding second battery modules 2.

[0045] According to some embodiments of the present invention, referring to Figure 1 , Figure 3 The first battery pack 10 also includes a first heat insulation pad, which is located between two adjacent first battery modules 1. The first heat insulation pad can isolate the heat conduction between the two first battery modules 1, prevent the first battery module 1 from affecting the surrounding first battery modules 1 when thermal runaway occurs, and thus improve the safety of the battery pack 100.

[0046] The second battery pack 20 also includes a second heat insulation pad, which is located between two adjacent second battery modules 2. The second heat insulation pad can isolate the heat conduction between the two second battery modules 2, prevent the second battery module 2 from affecting the surrounding second battery modules 2 when thermal runaway occurs, and thus improve the safety of the battery pack 100.

[0047] According to some embodiments of the present invention, referring to Figure 1-Figure 4 The battery pack 100 also includes a liquid cooling plate 40, which is located in a third direction relative to the first battery pack 10 and the second battery pack 20 (e.g., see attached diagram). Figure 1 On one side of the e3 direction, the liquid cooling plate 40 includes an inlet pipe 41 and an outlet pipe 42. Both the inlet pipe 41 and the outlet pipe 42 are located between the first battery pack 10 and the second battery pack 20, and the space between the first battery pack 10 and the second battery pack 20 can be used to arrange the inlet pipe 41 and the outlet pipe 42.

[0048] The liquid cooling plate 40 has a first end 43 and a second end 44 at its two ends along the second direction. The liquid inlet pipe 41 and the liquid outlet pipe 42 are arranged adjacent to the first end 43, which facilitates the connection of the liquid inlet pipe 41 and the liquid outlet pipe 42 to external pipelines. The first direction, the second direction and the third direction are perpendicular to each other.

[0049] Thermally conductive adhesive is applied to the third-direction side of the first battery pack 10 and the second battery pack 20. The first battery pack 10 and the second battery pack 20 can be fixed to the liquid cooling plate 40 by the thermally conductive adhesive. This not only increases the structural strength of the first battery pack 10 and the second battery pack 20 fixed to the liquid cooling plate 40, but also increases the heat exchange efficiency between the liquid cooling plate 40 and the first battery pack 10 and the second battery pack 20.

[0050] For example, both the first battery module 1 and the second battery module 2 are encapsulated in a heat-conducting shell and then fixed on the liquid cooling plate 40. The first battery module 1 and the second battery module 2 themselves have better temperature uniformity, lower requirements for the cold plate flow channel design, and reduce the complexity of the liquid cooling plate 40 design.

[0051] A reinforcing plate is arranged on the other side of the first battery pack 10 and the second battery pack 20 in a third direction. The reinforcing plate is arranged opposite to the liquid cooling plate 40 to increase the structural strength of the other side of the first battery pack 10 and the second battery pack 20 in a third direction.

[0052] According to some embodiments of the present invention, referring to Figure 4 The battery pack 100 also includes a first electrical connector 51, which is located between the first battery pack 10 and the second battery pack 20. The first electrical connector 51 is used to electrically connect the first battery module 1 and the second battery module 2 located at the same end of the liquid cooling plate 40. The first battery pack 10 and the second battery pack 20 are arranged in a U-shape. The first electrical connector 51 is located adjacent to the second end 44, so that the total positive and total negative of the first battery pack 10 and the second battery pack 20 are integrated into the first end 43. The total positive and total negative of the first battery pack 10 and the second battery pack 20, as well as the liquid inlet pipe 41 and the liquid outlet pipe 42, are all led out from the first end 43, which facilitates unified and centralized connection with the outside.

[0053] For example, a low-voltage fuse is provided on the first electrical connector 51.

[0054] According to some embodiments of the present invention, referring to Figures 3-4The battery pack 100 also includes a BMS slave board 52, which is located between the first battery pack 10 and the second battery pack 20, and between the inlet pipe 41, the outlet pipe 42, and the exhaust pipe 30. The BMS slave board 52 is used to collect parameters such as voltage and temperature of the first battery pack 10 and the second battery pack 20. By placing the BMS slave board 52 between the inlet pipe 41, the outlet pipe 42, and the exhaust pipe 30, that is, by placing the BMS slave board 52 adjacent to the first end 43, the space between the first battery pack 10 and the second battery pack 20 can be utilized in a reasonable way.

[0055] For example, the specifications of the BMS slave board 52 are selected according to the number of battery modules. In this embodiment, the battery pack 100 has 10 battery modules, and the BMS slave board 52 can select 12 modules. Compared with the battery pack solution in related technologies, the number of BMS acquisition channels is greatly reduced, thereby significantly reducing the acquisition cost.

[0056] According to some embodiments of the present invention, referring to Figures 3-4 The exhaust pipe 30 has an exhaust port 34, which is located near the first end 43. The exhaust port 34, BMS slave plate 52, inlet pipe 41 and outlet pipe 42 of the exhaust pipe 30 are led out near the first end 43. The first electrical connector 51 is located near the second end 44. The internal structure of the battery pack 100 is reasonably planned, which can increase the space utilization of the battery pack 100. Moreover, the exhaust port 34, BMS slave plate 52, inlet pipe 41 and outlet pipe 42 are led out from the first end 43 in a centralized manner, which facilitates unified and centralized connection with the outside.

[0057] According to some embodiments of the present invention, referring to Figure 1 , Figures 3-4 The first battery pack 10 also includes a second electrical connector 12 and a third electrical connector 21. The second electrical connector 12 is electrically connected between two adjacent first battery modules 1, and the second electrical connector 12 can realize the series arrangement of multiple first battery modules 1 in the first battery pack 10. For example, there are multiple first battery modules 1, one of which is connected to the outside of two adjacent first battery modules 1, and another is connected to the inside of two adjacent first battery modules 1, so as to realize the series arrangement of multiple first battery modules 1.

[0058] The third electrical connector 21 is electrically connected between two adjacent second battery modules 2. The third electrical connector 21 can realize the series arrangement between multiple first battery modules 1 of the third battery pack. For example, there are multiple second battery modules 2. One third electrical connector 21 is connected to the outside of two adjacent second battery modules 2, and another third electrical connector 21 is connected to the inside of two adjacent second battery modules 2, so as to realize the series arrangement between multiple second battery modules 2.

[0059] According to some embodiments of the present invention, referring to Figure 1 , Figures 3-4 Both the second electrical connector 12 and the third electrical connector 21 include an electrical connector plate 121, a first side plate 122, and a second side plate 123. The first side plate 122 and the second side plate 123 are respectively connected to the two sides of the electrical connector plate 121 in a second direction. The dimension of the electrical connector plate 121 in a third direction is larger than the dimensions of the first side plate 122 and the second side plate 123 in a third direction. That is, the second electrical connector 12 and the third electrical connector 21 are designed with a structure that is narrow at both ends and wide in the middle to meet the actual working condition where the current carrying capacity gradually increases in the middle.

[0060] When installing the battery modules, the second electrical connector 12 and the third electrical connector 21, located between the first battery pack 10 and the second battery pack 20, can be electrically connected between adjacent first battery modules 1 and second battery modules 2. Then, the first battery pack 10 and the second battery pack 20 are fixed to the liquid cooling plate 40. Next, the second electrical connector 12 and the third electrical connector 21 are installed on the outer sides of the first battery pack 10 and the second battery pack 20, followed by the installation of the first electrical connector 51. Compared with energy storage PACK battery packs in related technologies, the battery pack 100 of this application has advantages such as simple design and installation process, very few types and quantities of components, fewer heat insulation pads used, lower material and manufacturing costs, significantly reduced overall cost, and high space utilization.

[0061] Throughout this specification, references to terms such as "some embodiments," "optionally," "further," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: First battery pack; The second battery pack, wherein the first battery pack and the second battery pack are spaced apart along a first direction; An exhaust pipe is located between the first battery pack and the second battery pack, and the exhaust pipe has an exhaust channel that is connected to both the first battery pack and the second battery pack. The first battery pack includes a plurality of first battery modules arranged along the second direction, and the exhaust pipe further includes a main pipe and a plurality of first exhaust pipes connected to the main pipe. The plurality of first exhaust pipes correspond one-to-one with and are connected to the plurality of first battery modules. The second battery pack includes a plurality of second battery modules arranged along the second direction, and the exhaust pipe also includes a plurality of second exhaust pipes connected to the main pipe. The plurality of second exhaust pipes correspond one-to-one with and are connected to the plurality of second battery modules, wherein the first direction is perpendicular to the second direction.

2. The battery pack according to claim 1, characterized in that, Each of the first battery modules has a first explosion-proof valve, and the first explosion-proof valve and the first exhaust pipe are respectively located on opposite sides of the first battery module in the first direction; Each of the second battery modules has a second explosion-proof valve, and the second explosion-proof valve and the second exhaust pipe are located on opposite sides of the second battery module in the first direction.

3. The battery pack according to claim 1, characterized in that, The first battery pack further includes: a first heat insulation pad, which is located between two adjacent first battery modules; The second battery pack further includes a second heat insulation pad, which is located between two adjacent second battery modules.

4. The battery pack according to claim 1, characterized in that, Also includes: A liquid cooling plate is located on one side of the first battery pack and the second battery pack in a third direction. The liquid cooling plate includes an inlet pipe and an outlet pipe, both of which are located between the first battery pack and the second battery pack. The two ends of the liquid cooling plate along the second direction are a first end and a second end, respectively. The inlet pipe and the outlet pipe are disposed adjacent to the first end, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

5. The battery pack according to claim 4, characterized in that, Also includes: A first electrical connector is located between the first battery pack and the second battery pack. The first electrical connector is used to electrically connect the first battery module and the second battery module located at the same end of the liquid cooling plate. The first electrical connector is disposed adjacent to the second end.

6. The battery pack according to claim 4, characterized in that, Also includes: The BMS slave board is located between the first battery pack and the second battery pack, and between the liquid inlet pipe, the liquid outlet pipe and the exhaust pipe.

7. The battery pack according to claim 5, characterized in that, The exhaust pipe has an exhaust port, which is located adjacent to the first end.

8. The battery pack according to claim 1, characterized in that, The first battery pack further includes a second electrical connector and a third electrical connector. The second electrical connector is electrically connected between two adjacent first battery modules, and the third electrical connector is electrically connected between two adjacent second battery modules.

9. The battery pack according to claim 8, characterized in that, Both the second electrical connector and the third electrical connector include an electrical connector plate and a first side plate and a second side plate connected to both sides of the electrical connector plate in a second direction. The dimension of the electrical connector plate in a third direction is larger than the dimensions of the first side plate and the second side plate in the third direction.

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