Battery pack and vehicle

Abstract

The present application provides a battery pack and a vehicle. The battery pack comprises a frame, a cell module, and flow guide members, wherein pressure relief channels are formed inside the frame, the frame is provided with pressure relief inlets and a pressure relief outlet that are communicated with the pressure relief channels, and the pressure relief outlet is provided on an outer side wall of the frame; a flow guide channel communicated with the pressure relief inlets is formed in each flow guide member, pressure relief holes communicated with the flow guide channel are formed on the side of each flow guide member facing a corresponding explosion-proof valve, and the projections of the pressure relief holes on battery cells at least partially overlap with the explosion-proof valves so as to communicate the explosion-proof valves with the flow guide channels.

Description

Battery packs and vehicles

[0001] This application claims priority to Chinese Patent Application No. 202423001959.5, filed with the Chinese Patent Office on December 5, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a battery pack and a vehicle. Background Technology

[0003] The battery packs used in electric vehicles are generally lithium batteries. Lithium batteries are susceptible to thermal runaway under conditions such as short circuits, overcharging and over-discharging, exceeding temperature limits, and mechanical damage. The explosion-proof valves of the cells inside the battery pack are mostly facing the direction of the passenger compartment. When thermal runaway occurs in the battery pack, toxic high-temperature gases or flames generated inside the battery pack can easily break through the battery pack cover and spread into the passenger compartment, posing a risk to the safety of the occupants.

[0004] Technical issues

[0005] In related technologies, the explosion-proof valves of the battery cells inside the battery pack are oriented away from the passenger compartment to reduce the risk of injury to occupants from thermal runaway of the battery pack. However, when the battery pack experiences thermal runaway, although the toxic and high-temperature gases produced by the battery pack are ejected downwards, they will exert an upward force on the battery cells inside the battery pack. When this force is large, there is a risk that the battery cells will move upwards and break through the battery pack cover, meaning there is still a risk to the safety of the occupants. Summary of the Invention

[0006] Technical solutions

[0007] In a first aspect, embodiments of this application provide a battery pack, comprising:

[0008] The frame encloses and forms a receiving space, which has openings at both ends in the height direction of the frame. A pressure relief channel is formed inside the frame. The frame has a pressure relief inlet and a pressure relief outlet connected to the pressure relief channel, and the pressure relief outlet is located on the outer wall of the frame.

[0009] A battery cell module is installed in a housing space. The battery cell module includes battery cells, and the explosion-proof valves of the battery cells face any opening of the housing space.

[0010] A flow guide is installed on the frame. A flow guide channel is formed inside the flow guide and is connected to the pressure relief inlet. The side of the flow guide facing the explosion-proof valve of the battery cell has a pressure relief hole that is connected to the flow guide channel. The projection of the pressure relief hole on the battery cell at least partially coincides with the explosion-proof valve.

[0011] With the explosion-proof valve of the battery cell open, the pressure relief hole is configured to connect the explosion-proof valve and the flow channel.

[0012] As an alternative to the battery pack, the frame includes multiple outer frames connected in sequence, each outer frame having an external pressure relief channel formed therein, and the external pressure relief channels are interconnected to form part of the pressure relief channel.

[0013] As an optional solution for the battery pack, the frame also includes an inner frame, the two ends of which are connected to two oppositely arranged outer frames. An inner pressure relief channel is formed in the inner frame, and the inner pressure relief channel is connected to the outer pressure relief channel in the corresponding outer frame.

[0014] As an optional solution for the battery pack, there are two inner frames, which are set in parallel and spaced apart, and together with the corresponding outer frame to form a receiving space.

[0015] As an optional solution for the battery pack, the first end of the flow guide is fixed to one of the two inner frames. The side of the first end of the flow guide facing the explosion-proof valve of the battery cell has a first connecting hole that communicates with the flow channel. The inner frame connected to the first end of the flow guide has a pressure relief inlet that corresponds to and communicates with the first connecting hole; and / or

[0016] The second end of the flow guide is fixed to the other inner frame of the two inner frames. The side of the second end of the flow guide facing the explosion-proof valve of the battery cell has a second connection hole that communicates with the flow guide channel. The inner frame connected to the second end of the flow guide has a pressure relief inlet that communicates with the second connection hole.

[0017] As an optional solution for the battery pack, the battery pack also includes an insulating component. An insulating component is provided between the current guide and the battery cell. The insulating component has multiple first through holes that correspond one-to-one with the pressure relief holes.

[0018] As an alternative to the battery pack, the shape of the pressure relief hole is the same as that of the first through hole.

[0019] As an optional solution for the battery pack, multiple battery cells arranged along a first direction form a battery cell group, and at least two battery cell groups are arranged at intervals along a second direction. Each battery cell group is equipped with a current guide, wherein the first direction and the second direction are perpendicular to each other.

[0020] As an optional solution for the battery pack, the battery pack also includes a support extending along a first direction, with a support between two adjacent sets of battery cells, and the length of the support in the first direction is the same as the length of the battery cell set.

[0021] Secondly, embodiments of this application provide a vehicle including a chassis, a body, and a battery pack as described above. The body is mounted on the chassis and cooperates with the chassis to form a passenger compartment. The battery pack is mounted on the chassis, and the explosion-proof valves of the cells in the battery pack are disposed away from the passenger compartment.

[0022] Beneficial effects

[0023] The beneficial effects of this application are:

[0024] The battery pack provided in this application includes a frame, cell modules, and a flow guide. A pressure relief channel is formed inside the frame, which has a pressure relief inlet and an outlet connected to the pressure relief channel. The pressure relief outlet is located on the outer wall of the frame. A flow guide is formed inside the flow guide, connected to the pressure relief inlet. The side of the flow guide facing the explosion-proof valve of the cell has a pressure relief hole connected to the flow guide channel. The projection of this pressure relief hole onto the cell at least partially coincides with the explosion-proof valve, thus connecting the explosion-proof valve and the flow guide channel. When a cell experiences thermal runaway, the high-temperature gas inside the cell is ejected from its explosion-proof valve, enters the flow guide channel through the pressure relief hole, and, guided by the flow guide channel, enters the pressure relief channel from the pressure relief inlet and exits from the pressure relief outlet on the outer wall of the frame. This not only prevents the high-temperature gas from directly spraying towards the battery pack cover but also prevents the high-temperature gas from wandering to other locations within the battery pack, thereby improving battery pack safety.

[0025] The vehicle provided in this application, by using the aforementioned battery pack, can reduce the risk to occupant safety in the event of thermal runaway of the battery pack. Attached Figure Description

[0026] Figure 1 shows a schematic diagram of the structure of the battery pack provided in an embodiment of this application.

[0027] Figure 2 shows a cross-sectional schematic diagram of the battery pack provided in an embodiment of this application.

[0028] Figure 3 shows a schematic diagram of the structure of the battery pack concealed cover provided in an embodiment of this application.

[0029] Figure 4 shows an exploded view of the battery pack in Figure 3.

[0030] Figure 5 shows a partial cross-sectional view of the battery pack in Figure 3.

[0031] Figure 6 shows a schematic diagram of the flow guide provided in an embodiment of this application.

[0032] Figure 7 shows a schematic diagram of the vehicle structure provided in an embodiment of this application.

[0033] Figure label:

[0034] 1. Frame; 101. Pressure relief outlet; 102. Pressure relief inlet; 102a. First pressure relief inlet; 102b. Second pressure relief inlet; 11. Outer frame; 110. External pressure relief channel; 111. First outer frame; 112. Second outer frame; 113. Third outer frame; 114. Fourth outer frame; 12. Inner frame; 120. Internal pressure relief channel; 120a. First internal pressure relief channel; 120b. Second internal pressure relief channel; 121. First inner frame; 122. Second inner frame;

[0035] 2. Battery cell module; 20. Battery cell assembly; 21. Battery cell; 211. Explosion-proof valve;

[0036] 3. Flow guide; 30. Flow guide channel; 31. Pressure relief hole; 32. First connecting hole; 33. Second connecting hole;

[0037] 4. Insulating component; 41. First through hole; 42. Second through hole;

[0038] 5. Support components;

[0039] 6. Expanding foam;

[0040] 7. Box lid;

[0041] 8. Pressure relief valve;

[0042] 9. Fireproof protective cover;

[0043] 100. Chassis; 200. Body. Detailed Implementation

[0044] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0045] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0046] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0047] In this application, relative terms used in conjunction with quantities or conditions (e.g., “about,” “approximately,” “basically,” etc.) include the value and have the meaning indicated by the context. For example, the relative term includes at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0048] In this application, the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0049] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context of a connection between an element and another element, "upper" or "lower" means that the element can be directly connected to the other element or indirectly connected through an intermediate element. The directional terms "upper side," "lower side," "left side," "right side," "front side," and "rear side" not only represent direct orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower back.

[0050] This application provides a vehicle, as shown in FIG7, including a chassis 100, a body 200 and a battery pack. The body 200 is mounted on the chassis 100 and cooperates with the chassis 100 to form a passenger compartment. The battery pack is mounted on the chassis 100 and is configured to provide power to the vehicle so that the vehicle can drive normally.

[0051] Figure 1 shows a schematic diagram of the battery pack structure provided in an embodiment of this application. Figure 2 shows a cross-sectional schematic diagram of the battery pack provided in an embodiment of this application. Figure 3 shows a schematic diagram of the hidden cover 7 of the battery pack provided in an embodiment of this application. As shown in Figures 1 to 3, the battery pack includes a frame 1, a cell module 2, and a cover 7. The frame 1 encloses a receiving space for accommodating the cell module 2. The receiving space has openings at both ends in the height direction of the frame 1. The two covers 7 are respectively fixed to the top opening and the bottom opening of the frame 1, thereby realizing the encapsulation of the cell module 2.

[0052] The battery cell module 2 is installed in the housing space. The battery cell module 2 includes multiple battery cells 21. The explosion-proof valves 211 of the battery cells 21 face any opening of the housing space. When the battery pack is installed into the chassis 100 of the vehicle, the explosion-proof valves 211 of the battery cells 21 inside the battery pack are away from the passenger compartment of the vehicle. This can prevent harmful substances generated by thermal runaway of the battery pack from being sprayed directly towards the passenger compartment. It can also reduce the spread rate of heat diffusion and improve the safety performance of the battery pack.

[0053] In this embodiment, the cover 7 integrates the function of a liquid cooling plate, which can not only dissipate heat or heat the battery cell module 2, but also reduce the weight of the battery pack, achieving a lightweight design. For example, the cover 7 and the frame 1 are fixedly connected by blind rivets, and structural adhesive is applied to the connection area to improve the sealing performance. Furthermore, the edges of the cover 7 and the frame 1 can be fixedly connected by friction stir welding, which provides both high connection strength and good sealing.

[0054] The use of thermally conductive structural adhesive to fix the battery cell module 2 to the cover 7 not only improves the heat conduction between the battery cell module 2 and the cover 7, but also enhances the stability of the battery cell module 2 installation.

[0055] Figure 4 shows an exploded view of the battery pack in Figure 3. Figure 5 shows a cross-sectional view of the battery pack in Figure 3. As shown in Figures 4 and 5 and in conjunction with Figure 2, the battery pack also includes a flow guide 3, which is mounted on a frame 1. A pressure relief channel is formed inside the frame 1. The frame 1 has a pressure relief inlet 102 and a pressure relief outlet 101 connected to the pressure relief channel, and the pressure relief outlet 101 is located on the outer wall of the frame 1. A flow guide channel 30 is formed inside the flow guide 3, which is connected to the pressure relief inlet 102. The side of the flow guide 3 facing the explosion-proof valve 211 of the cell 21 has a pressure relief hole 31 connected to the flow guide channel 30. The projection of the pressure relief hole 31 on the cell 21 at least partially coincides with the explosion-proof valve 211, so that the pressure relief hole 31 connects the explosion-proof valve 211 and the flow guide channel 30. Wherein, when the explosion-proof valve 211 of the cell 21 is open, the pressure relief hole 31 is configured to connect the explosion-proof valve 211 and the flow guide channel 30. When thermal runaway occurs in cell 21, the high-temperature gas inside cell 21 is ejected from its explosion-proof valve 211, then enters the flow channel 30 through the pressure relief hole 31, and under the guidance of the flow channel 30, enters the pressure relief channel from the pressure relief inlet 102 and is discharged from the pressure relief outlet 101 on the outer wall of the frame 1. This not only prevents the high-temperature gas from being directly sprayed onto the cover 7, reducing the probability that the high-temperature gas will cause cell 21 to move upward and break open the cover 7 due to the rebound effect of the cover 7, but also prevents the high-temperature gas from wandering in other parts of the battery pack, thereby improving the safety of the battery pack.

[0056] In addition, the battery pack also includes a pressure relief valve 8, which is installed on the outer wall of the frame 1 and connected to the pressure relief outlet 101. The pressure relief valve 8 can be a conventional battery pack pressure relief valve, and its structure and working principle will not be described in detail here.

[0057] The battery pack also includes a fireproof protective cover 9, which is installed on the outer wall of the frame 1 and covers the pressure relief valve 8 to protect it. A gap is left between the fireproof protective cover 9 and the outer wall of the frame 1 to allow gas ejected from the pressure relief valve 8 to escape.

[0058] The frame 1 includes a plurality of sequentially connected outer frame edges 11. In this embodiment, the frame 1 includes four sequentially connected outer frame edges 11, each outer frame edge 11 having an external pressure relief channel 110 formed therein, and each external pressure relief channel 110 being interconnected and forming part of a pressure relief channel. In other embodiments, the outer frame edges 11 of the frame 1 may also be formed as a single integral structure without the need for assembly.

[0059] The frame 1 also includes an inner frame 12, the two ends of which are connected to two oppositely arranged outer frames 11. An inner pressure relief channel 120 is formed in the inner frame 12, and the inner pressure relief channel 120 is connected to the outer pressure relief channel 110 in the corresponding outer frame 11.

[0060] There are two inner frame frames 12, which are arranged in parallel and spaced apart, and together with the corresponding outer frame frames 11 to form a receiving space. In this way, the space enclosed by the outer frame frames 11 can be divided into two spaces, one of which is set to accommodate the cell module 2, and the other is set to accommodate electronic components such as the battery management system of the battery pack. This can improve the space utilization rate inside the battery pack and enhance the installation stability of the cell module 2.

[0061] For ease of description, refer to Figures 2 to 5. The two inner borders 12 are respectively referred to as the first inner border 121 and the second inner border 122. The two outer borders 11 connected to the inner borders 12 are respectively referred to as the first outer border 111 and the second outer border 112. The other two outer borders 11 are respectively referred to as the third outer border 113 and the fourth outer border 114. One end of the first inner frame 121 is fixedly connected to the first outer frame 111, and the other end of the first inner frame 121 is fixedly connected to the second outer frame 112. The internal pressure relief channel 120 in the first inner frame 121 is designated as the first internal pressure relief channel 120a, and the pressure relief inlet 102 opened thereon is designated as the first pressure relief inlet 102a. One end of the second inner frame 122 is fixedly connected to the first outer frame 111, and the other end of the second inner frame 122 is fixedly connected to the second outer frame 112. The internal pressure relief channel 120 in the second inner frame 122 is designated as the second internal pressure relief channel 120b, and the pressure relief inlet 102 opened thereon is designated as the second pressure relief inlet 102b.

[0062] Figure 6 shows a schematic diagram of the structure of the flow guide 3 provided in the embodiment of this application. As shown in Figure 6 in conjunction with Figures 2 to 5, the first end of the flow guide 3 is fixed to the first inner frame 121. The side of the first end of the flow guide 3 facing the explosion-proof valve 211 of the battery cell 21 has a first connecting hole 32 that communicates with the flow guide channel 30. The first inner frame 121 has a first pressure relief inlet 102a that communicates with the first connecting hole 32. The second end of the flow guide 3 is fixed to the second inner frame 122. The side of the second end of the flow guide 3 facing the explosion-proof valve 211 of the battery cell 21 has a second connecting hole 33 that communicates with the flow guide channel 30. The second inner frame 122 has a second pressure relief inlet 102b that communicates with the second connecting hole 33. With this configuration, when multiple battery cells 21 experience thermal runaway, a portion of the high-temperature gas in the flow channel 30 of the flow guide 3 can enter the first pressure relief inlet 102a through the first connection hole 32, then enter the first internal pressure relief channel 120a, and under the guidance of the second internal pressure relief channel 120b, enter the external pressure relief channel 110, and finally be discharged from the pressure relief valve 8 of the pressure relief outlet 101; another portion can enter the second pressure relief inlet 102b through the second connection hole 33, then enter the second internal pressure relief channel 120b, and under the guidance of the second internal pressure relief channel 120b, enter the external pressure relief channel 110, and finally be discharged from the pressure relief valve 8 of the pressure relief outlet 101.

[0063] In this embodiment, the flow guide 3 can be made of aluminum extrusion strip. Aluminum extrusion strip has the advantages of high structural strength, light weight and low processing cost, which enhances the competitiveness of the battery pack.

[0064] In addition, during the molding process, the flow channel 30 inside the flow guide 3 is open at both ends in the length direction of the flow guide 3. Therefore, before or after the assembly of the flow guide 3, it is necessary to use a sealing strip to block the open ends of the flow channel 30 to reduce the amount of high temperature gas directly emitted into the battery pack.

[0065] The battery pack also includes an insulating component 4. An insulating component 4 is provided between the current guide 3 and the battery cell 21. The insulating component 4 has multiple first through holes 41 that correspond one-to-one with the pressure relief holes 31. This arrangement can ensure both the insulating fit between the current guide 3 and the battery cell 21 and the ability of the high-temperature gas ejected from the explosion-proof valve 211 of the battery cell 21 to enter the pressure relief hole 31 through the first through holes 41 and then enter the current guide channel 30.

[0066] The shape of the pressure relief hole 31 is the same as that of the first through hole 41, for example, both are the same as the shape of the explosion-proof valve 211 of the battery cell 21. In this embodiment, both the pressure relief hole 31 and the first through hole 41 are oblong holes.

[0067] In addition, the insulating component 4 also has two second through holes 42, one of which is connected to the first connecting hole 32 and the other is connected to the second connecting hole 33, so as to ensure that the gas in the flow channel 30 can enter the internal pressure relief channel 120.

[0068] In this embodiment, the insulating component 4 can be made of foam. The foam not only provides insulation but also has a shock-absorbing effect. It can absorb the force exerted by the current guide 3 on the battery cell 21. In the event of vibration of the battery pack, the current guide 3 exerts a large force on the battery cell 21, preventing the battery cell 21 from being excessively squeezed, thereby improving the stability of the battery cell 21.

[0069] To improve the stability of the flow guide 3 installation, structural adhesive is provided between the flow guide 3 and the box cover 7, which can enhance the connection strength between the flow guide 3 and the box cover 7.

[0070] Referring again to Figure 4, multiple battery cells 21 arranged along a first direction form a battery cell group 20. Two battery cell groups 20 are arranged at intervals along a second direction. Each battery cell group 20 is equipped with a current guide 3. The first direction and the second direction are perpendicular to each other. In other embodiments, the number of battery cell groups 20 is at least two groups, and can be any number such as one, three, four, or five groups, without limitation.

[0071] To improve the stability of the cell module 2, the battery pack also includes a support member 5 extending along a first direction. There is a support member 5 between two adjacent cell modules 20. In the first direction, the length of the support member 5 is the same as the length of the cell module 20.

[0072] After all the battery cells 20 are installed in the housing space, expanding foam 6 is poured into the housing space. This not only ensures the stability of the battery cells 20, but also ensures the insulation between the battery cells 20 and the support 5, the inner frame 12, and the outer frame 11, thereby improving the safety of the battery pack.

Claims

1. A battery pack, comprising: A frame (1) is formed to enclose a receiving space. The receiving space has openings at both ends in the height direction of the frame (1). A pressure relief channel is formed inside the frame (1). The frame (1) has a pressure relief inlet (102) and a pressure relief outlet (101) connected to the pressure relief channel. The pressure relief outlet (101) is located on the outer wall of the frame (1). A battery cell module (2) is installed in the receiving space, the battery cell module (2) includes a battery cell (21), and the explosion-proof valve (211) of the battery cell (21) faces any opening of the receiving space; A flow guide (3) is installed in the frame (1). The flow guide (3) has a flow channel (30) that communicates with the pressure relief inlet (102). The side of the flow guide (3) facing the explosion-proof valve (211) of the battery cell (21) has a pressure relief hole (31) that communicates with the flow channel (30). The projection of the pressure relief hole (31) on the battery cell (21) is at least partially coincident with the explosion-proof valve (211). When the explosion-proof valve (211) of the battery cell (21) is open, the pressure relief hole (31) is configured to connect the explosion-proof valve (211) and the flow channel (30).

2. The battery pack according to claim 1, wherein, The frame (1) includes a plurality of outer frame (11) connected in sequence, each outer frame (11) having an external pressure relief channel (110) formed therein, and the plurality of external pressure relief channels (110) are connected to form part of the pressure relief channel.

3. The battery pack according to claim 2, wherein, The frame (1) also includes an inner frame (12), the two ends of which are connected to two opposite outer frames (11). An inner pressure relief channel (120) is formed in the inner frame (12), and the inner pressure relief channel (120) is connected to the outer pressure relief channel (110) in the corresponding outer frame (11).

4. The battery pack according to claim 3, wherein, The number of inner frame (12) is two, and the two inner frame (12) are arranged in parallel and spaced apart, and together with the corresponding outer frame (11) to form the accommodating space.

5. The battery pack according to claim 4, wherein, The battery pack includes at least one of the following: The first end of the flow guide (3) is fixed to one of the two inner frame frames (12). The side of the first end of the flow guide (3) facing the explosion-proof valve (211) of the battery cell (21) has a first connecting hole (32) that communicates with the flow guide channel (30). The inner frame frame (12) connected to the first end of the flow guide (3) has a pressure relief inlet (102) that communicates with the first connecting hole (32). The second end of the flow guide (3) is fixed to the other inner frame (12) of the two inner frames (12). The second end of the flow guide (3) facing the explosion-proof valve (211) of the battery cell (21) has a second connecting hole (33) that communicates with the flow guide channel (30). The inner frame (12) connected to the second end of the flow guide (3) has a pressure relief inlet (102) that communicates with the second connecting hole (33).

6. The battery pack according to claim 1, wherein, The battery pack also includes an insulating component (4), and the insulating component (4) is provided between the current guide (3) and the battery cell (21). The insulating component (4) has a plurality of first through holes (41) corresponding one-to-one with the pressure relief hole (31).

7. The battery pack according to claim 6, wherein, The shape of the pressure relief hole (31) is the same as the shape of the first through hole (41).

8. The battery pack according to any one of claims 1 to 7, wherein, Multiple battery cells (21) arranged along a first direction form a battery cell group (20), and at least two battery cell groups (20) are arranged at intervals along a second direction. The at least two battery cell groups (20) are each equipped with the current guide (3), wherein the first direction and the second direction are perpendicular to each other.

9. The battery pack according to claim 8, wherein, The battery pack also includes a support member (5) extending along the first direction, with the support member (5) between two adjacent sets of battery cells (20), and the length of the support member (5) being the same as the length of the battery cell set (20) in the first direction.

10. A vehicle comprising a chassis (100), a body (200), and a battery pack as claimed in any one of claims 1 to 9, wherein the body (200) is mounted on the chassis (100) and cooperates with the chassis (100) to form a passenger compartment, the battery pack is mounted on the chassis (100), and the explosion-proof valves (211) of the cells (21) in the battery pack are disposed away from the passenger compartment.

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