Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle, the battery pack comprises a battery cell, a cover body and a box body, an accommodating space is arranged between the cover body and the box body, and the battery cell is accommodated in the accommodating space. Wherein the box body is provided with a combined water channel, the combined water channel comprises a first water channel and a second water channel, the first water channel is parallel to the bottom wall of the battery cell, and the second water channel is parallel to the side wall of the battery cell. By arranging the combined water channel on the box body, the cooling effect on the battery cells in the box body can be improved, so that the overall working efficiency and safety of the battery pack are improved. Specifically, the combined water channel can comprise a first water channel and a second water channel, the first water channel is parallel to the bottom wall of the battery cell, and the second water channel is parallel to the side wall of the battery cell, so that the combined water channel can cool the bottom wall and the side wall of the battery cell at the same time, the cooling effect of the combined water channel on the battery cell is improved, the battery cell can be always in a proper working temperature, and the service life of the battery cell is prolonged. Therefore, the working efficiency of the battery cell can be improved, and the risk of damage caused by overheating of the battery cell can be reduced.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, specifically to a battery pack and a vehicle. Background Technology

[0002] With the rapid development of the electric vehicle industry, battery technology has become a key factor restricting the performance and safety of electric vehicles. Because the cells inside the battery pack are highly sensitive to ambient temperature, a heat dissipation device is needed within the battery pack to maximize battery performance and ensure battery lifespan. Current heat dissipation devices typically consist of liquid cooling plates located at the bottom of the cells to achieve heat dissipation and cooling. However, placing only a liquid cooling plate at the bottom of the cells results in poor heat dissipation efficiency. Utility Model Content

[0003] This application provides a battery pack and a vehicle to solve the technical problem of poor heat dissipation of battery cells in existing battery packs.

[0004] In a first aspect, embodiments of this application provide a battery pack, the battery pack including a battery cell, a cover and a housing, wherein there is an accommodating space between the cover and the housing, and the battery cell is housed within the accommodating space; wherein the housing is provided with a combined water channel, the combined water channel including a first water channel and a second water channel, the first water channel being parallel to the bottom wall of the battery cell, and the second water channel being parallel to the side wall of the battery cell.

[0005] In this embodiment, by setting up a combined water channel on the casing, the cooling effect on the battery cells inside the casing can be improved, thereby enhancing the overall operating efficiency and safety of the battery pack. Specifically, the combined water channel can include a first water channel and a second water channel, with the first water channel parallel to the bottom wall of the battery cell and the second water channel parallel to the side wall of the battery cell. This allows the combined water channel to simultaneously cool both the bottom and side walls of the battery cell, improving the cooling effect and ensuring that the battery cell remains within a suitable operating temperature range. This, in turn, improves the operating efficiency of the battery cell, reduces the risk of damage caused by overheating, and enhances the safety of the battery pack.

[0006] In one specific embodiment, at least a portion of the bottom wall of the container is a hollow structure for forming the first waterway; the container includes at least one hollow partition plate for forming the second waterway; the partition plate is fixedly connected to the bottom wall of the container.

[0007] In one specific embodiment, the battery cell is located between adjacent isolation plates.

[0008] In one specific embodiment, the housing is provided with a plurality of combined water channels, wherein the projection of the second water channel in any of the combined water channels along the height direction of the battery pack is located within the projection range of the first water channel; the first water channel and the second water channel in the combined water channels are interconnected; along the length direction of the battery pack, the combined water channel has a first end and a second end that are disposed opposite to each other, and the plurality of combined water channels are isolated from each other at the first end and interconnected at the second end.

[0009] In one specific embodiment, the housing is further provided with a third waterway, which is disposed between adjacent first waterways and is used to connect the adjacent first waterways.

[0010] In one specific embodiment, the side wall of the housing facing the first end is provided with an inlet and an outlet; the combined water channel is provided with a through hole, the through hole connecting the first water channel and the second water channel; the inlet is connected to the first water channel of a portion of the combined water channel, and the outlet is connected to the first water channel of another portion of the combined water channel.

[0011] In one specific embodiment, the battery cell is provided with an explosion-proof valve, which is located on the side of the battery cell facing the first water channel; an exhaust channel is provided between adjacent first water channels, and the exhaust channel is recessed relative to the bottom wall; the projection of the explosion-proof valve along the height direction of the battery pack is located within the projection range of the exhaust channel.

[0012] In one specific embodiment, the combined waterway is provided with a through hole, which connects the first waterway and the second waterway; the inlet and the outlet are both connected to the first waterway through pipes.

[0013] In one specific embodiment, the battery pack further includes a pressure strip that abuts against the upper surface of the battery cell; along the height direction of the battery pack, the pressure strip includes a first insulating layer, a reinforcing layer, a second insulating layer, and an insulating snap-fit ​​layer stacked sequentially; the insulating snap-fit ​​layer snaps between adjacent battery cells.

[0014] Secondly, embodiments of this application provide a vehicle including a chassis and a battery pack, wherein the battery pack is mounted on the chassis.

[0015] In this embodiment, when the battery pack is installed on the vehicle chassis, the combined water channel has a good cooling effect on the battery cells, so the temperature of the battery pack can always be kept within a suitable range, avoiding the battery pack temperature from being too high and affecting other components on the vehicle chassis, thereby improving the overall safety of the vehicle.

[0016] In one specific embodiment, the chassis further includes a sill beam that abuts against the side wall of the housing; the chassis also includes a seat mounting beam that is fixedly connected to the cover. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the vehicle provided in this application in a specific embodiment;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the battery pack;

[0020] Figure 3 for Figure 2 Exploded view of the battery pack;

[0021] Figure 4 for Figure 3 Schematic diagram of the middle box and combined waterway;

[0022] Figure 5 for Figure 4 A bottom view;

[0023] Figure 6 for Figure 4 Cross-sectional view of the combined waterway;

[0024] Figure 7 for Figure 6 A magnified view of part I in the middle;

[0025] Figure 8 for Figure 2 A schematic diagram of the structure of the battery cell;

[0026] Figure 9 for Figure 2 Exploded view of the intermediate pressure bar;

[0027] Figure 10 for Figure 9 Cross-sectional view of the intermediate pressure bar.

[0028] Figure label:

[0029] 1-Vehicle;

[0030] 11-Battery Pack;

[0031] 111-cell;

[0032] 111a - Explosion-proof valve;

[0033] 112-Cap;

[0034] 113 - Box;

[0035] 114 - Combined Waterway;

[0036] 114a - First Waterway;

[0037] 114b - Second Waterway;

[0038] 115 - Isolation plate;

[0039] 116 - First end;

[0040] 117 - Second end;

[0041] 118 - Pressing strip;

[0042] 118a - First insulating layer;

[0043] 118b - Reinforcement layer;

[0044] 118c - Second insulating layer;

[0045] 118d - Insulating snap-fit ​​layer;

[0046] 119 - Connection port;

[0047] 120-Guard Plate;

[0048] 123 - Crossbeam;

[0049] 124 - Pipeline;

[0050] 125 - Third Waterway;

[0051] 126 - Inlet;

[0052] 127 - Outlet;

[0053] 128 - Exhaust passage;

[0054] 12-Chassis;

[0055] 121 - Threshold beam;

[0056] 122 - Seat mounting beam. Detailed Implementation

[0057] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0058] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0059] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0060] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0061] Electric vehicles (EVs) are vehicles powered by an onboard power source, using an electric motor to drive the wheels. They offer good economic efficiency and relatively low environmental pollution, making their development prospects highly promising. The battery pack is the primary power source for EVs; therefore, battery technology has become a key factor limiting their performance and safety. A battery pack typically consists of a casing, a housing, and battery cells. The housing provides support and protection for the cells. Since the cells are sensitive to ambient temperature, a cooling system is required within the battery pack to maximize performance and extend battery life. This cooling system is usually a liquid cooling plate located at the bottom of the cells. However, simply placing a liquid cooling plate at the bottom of the cells provides insufficient cooling, negatively impacting the battery pack's performance.

[0062] To solve the above technical problems, such as Figures 1-4 As shown, this application embodiment provides a battery pack 11 and a vehicle 1 including the battery pack 11. The vehicle 1 may further include a chassis 12, and the battery pack 11 may be disposed on the chassis 12. The battery pack 11 includes battery cells 111, a cover 112, and a housing 113. There is an accommodating space between the cover 112 and the housing 113, and the battery cells 111 are accommodated in the accommodating space. The housing 113 may be provided with a combined water channel 114, which includes a first water channel 114a and a second water channel 114b. The first water channel 114a is parallel to the bottom wall of the battery cell 111, and the second water channel 114b is parallel to the side wall of the battery cell 111.

[0063] In this embodiment, by providing a combined water channel 114 on the housing 113, the cooling effect on the battery cells 111 inside the housing 113 can be improved, thereby enhancing the overall working efficiency and safety of the battery pack 1. Specifically, the combined water channel 114 may include a first water channel 114a and a second water channel 114b, with the first water channel 114a parallel to the bottom wall of the battery cell 111 and the second water channel 114b parallel to the side wall of the battery cell 111. This allows the combined water channel 114 to simultaneously cool both the bottom and side walls of the battery cell 111, improving its cooling effect and ensuring that the battery cell 111 remains within a suitable operating temperature range. This, in turn, improves the working efficiency of the battery cell 111, reduces the risk of damage caused by overheating, and enhances the safety of the battery pack 1.

[0064] like Figure 1 and Figure 4 As shown, when the battery pack 11 is installed on the chassis 12 of the vehicle 1, the combined water channel 114 has a good cooling effect on the battery cells, so the temperature of the battery pack 11 can always be kept within a suitable range, avoiding the battery pack 11 temperature from being too high and affecting other components on the chassis 12 of the vehicle 1, thereby improving the overall safety of the vehicle 1.

[0065] In one specific embodiment, such as Figure 3 , Figure 4 and Figure 6 As shown, at least a portion of the bottom wall of the housing 113 may be a hollow structure to form a first waterway 114a. The housing 113 may also include at least one hollow partition plate 115 to form a second waterway 114b, and the partition plate 115 is fixedly connected to the bottom wall of the housing 113.

[0066] In this embodiment, by making part of the bottom wall of the housing 113 hollow, a first water channel 114a can be formed, allowing water to flow through the first water channel 114a to cool the battery cell 111 mounted on the bottom wall of the housing 113. Furthermore, by forming the first water channel 114a from the hollow bottom wall of the housing 113, no other components are needed, resulting in a simple structure and ease of implementation. Moreover, the bottom wall of the housing 113 is in direct contact with the battery cell 111, thereby reducing obstructions between the water in the first water channel 114a and the battery cell 111, further enhancing the cooling effect of the first water channel 114a on the battery cell 111.

[0067] Meanwhile, the housing 113 may also include at least one hollow partition plate 115 to form a second water channel 114b, thereby cooling the sidewalls of the battery cell 111. The combined action of the first water channel 114a and the second water channel 114b enables rapid cooling of the battery cell 111. Furthermore, fixing the partition plate 115 to the bottom wall of the housing 113 improves the reliability of the connection between the partition plate 115 and the housing 113, preventing the partition plate 115 from detaching after prolonged use.

[0068] The isolation plate 115 and the bottom wall of the box 113 can be welded or glued, etc. The connection method between the isolation plate 115 and the bottom wall of the box 113 is not limited in this embodiment.

[0069] In the above embodiments, such as Figure 3 and Figure 4 As shown, the battery pack 11 may also be provided with a protective plate 120, which is connected to the end of the bottom wall of the housing 113 away from the combined water channel 114. Since the bottom wall of the housing 113 has a hollow structure, the protective plate 120 can protect the bottom wall of the housing 113, preventing it from being in direct contact with the external environment and causing damage to the first water channel 114a or other internal components, thereby improving the service life and safety of the battery pack 11.

[0070] In one specific embodiment, such as Figure 3 and Figure 4 As shown, the battery cell 111 can be located between adjacent isolation plates 115.

[0071] In this embodiment, when the housing 113 is provided with multiple combined water channels 114, multiple isolation plates 115 need to be fixedly connected to the bottom wall of the housing 113, and the isolation plates 115 are spaced apart. This allows the battery cell 111 to be located between adjacent isolation plates 115, so that when cooling the battery cell 111, the second water channels 114b formed by the isolation plates 115 on both sides of the battery cell 111 can simultaneously cool both side walls of the battery cell 111, thereby further improving the cooling effect on the battery cell 111.

[0072] Meanwhile, the isolation plate 115 can also position and fix the battery cell 111. The isolation plate 115 can guide the installation of the battery cell 111, and installing the battery cell 111 between adjacent isolation plates 115 can also improve the stability of the battery cell 111. During vehicle operation, it can prevent the battery cell 111 from shifting or shaking, thereby improving the safety of the battery pack 11.

[0073] In one specific embodiment, such as Figures 3 to 6As shown, multiple combined water channels 114 can be provided on the housing 113. The projection of the second water channel 114b in any combined water channel 114 along the height direction of the battery pack 11 is located within the projection range of the first water channel 114a, and the first water channel 114a and the second water channel 114b in any combined water channel 114 are interconnected.

[0074] In this embodiment, the projection of the second water channel 114b along the height direction of the battery pack 11 is located within the projection range of the first water channel 114a. This facilitates the connection between the first water channel 114a and the second water channel 114b in the combined water channel 114, improving the reliability of the connection. It also facilitates the mutual communication between the first water channel 114a and the second water channel 114b in the combined water channel 114. Only one inlet or outlet end needs to be provided in the combined water channel 114 to simultaneously perform filling or draining operations on the first water channel 114a and the second water channel 114b.

[0075] In the above embodiments, such as Figures 4 to 6 As shown, the side wall of the housing 113 may also be provided with a water inlet 126 and a water outlet 127 for connecting to the outside, thereby enabling the filling or draining of the combined water channels 114 inside the housing 113. The water inlet 126 can communicate with a portion of the combined water channels 114, and the water outlet 127 can communicate with another portion of the combined water channels 114. Along the length of the battery pack 11, the combined water channels 114 have a first end 116 and a second end 117 arranged opposite to each other, with multiple combined water channels 114 isolated from each other at the first end 116 and interconnected at the second end 117. Both the water inlet 126 and the water outlet 127 are located on the side wall of the housing 113 facing the first end 116.

[0076] In this embodiment, the inlet 126 is connected to a portion of the combined water channels 114, and the outlet 127 is connected to another portion of the combined water channels 114. This allows the combined water channels 114 connected to the inlet 126 to be used for filling with water, and the combined water channels 114 connected to the outlet 127 to be used for draining water. Both the inlet 126 and the outlet 127 are located on the side wall of the housing 113 facing the first end 116. Therefore, the multiple combined water channels 114 are isolated from each other at the first end 116, allowing the inlet 126 to fill each connected combined water channel 114 with water, and preventing water from flowing directly into another combined water channel 114 connected to the outlet 127 and being discharged through the outlet 127, thus avoiding disruption to the overall water circulation of the combined water channels 114. At the same time, multiple combined waterways 114 are interconnected at the second end 117 so that the water in the combined waterways 114 can merge at the second end 117 and be discharged after flowing through the combined waterways 114 connected to the outlet 127, thus completing the overall water circulation of the combined waterways 114.

[0077] In this embodiment, the combined water channel 114 can be filled with water or other liquid coolant, and this embodiment does not limit the specific type of coolant.

[0078] In one specific embodiment, such as Figures 4 to 6 As shown, both the inlet 126 and the outlet 127 can be connected to the first waterway 114a via pipe 124. The combined waterway 114 may be provided with a through hole, which connects the first waterway 114a and the second waterway 114b.

[0079] In this embodiment, the combined waterway 114 may be provided with through holes to connect the first waterway 114a and the second waterway 114b. By providing through holes, the combined waterway 114 can be filled or drained as a whole simply by filling or draining the first waterway 114a or the second waterway 114b. Simultaneously, the inlet 126 and outlet 127 are connected to the first waterway 114a, allowing the inlet 126 and outlet 127 to fill and drain the combined waterway 114 as a whole through the first waterway 114a. Furthermore, a pipe 124 is provided between the inlet 126 and outlet 127 and the first waterway 114a to facilitate the arrangement of the inlet 126, outlet 127, and first waterway 114a. The pipe 124 may be provided with multiple connection ports 119 to simultaneously connect multiple first waterways 114a.

[0080] In one specific embodiment, such as Figures 4 to 6 As shown, the box body 113 may also be provided with a third waterway 125, which is located between adjacent first waterways 114a and is used to connect adjacent first waterways 114a.

[0081] In this embodiment, by setting a third waterway 125, the adjacent first waterway 114a can be connected so that multiple combined waterways 114 are interconnected at the second end, and the water in the multiple combined waterways 114 can merge through the third waterway 125 and flow into the combined waterway 114 connected to the outlet 127, and then be discharged after flowing through this part of the combined waterway 114, so as to ensure that the water in the combined waterway 114 can circulate normally.

[0082] In the above embodiments, such as Figures 6-8 As shown, the battery cell 111 may be equipped with an explosion-proof valve 111a, which is located on the side of the battery cell 111 facing the first water channel 114a. An exhaust channel 128 may also be provided between adjacent first water channels 114a, and the exhaust channel 128 is recessed relative to the bottom wall of the housing 113. The projection of the explosion-proof valve 111a along the height direction of the battery pack lies within the projection range of the exhaust channel 128.

[0083] In this embodiment, an exhaust channel 128 is provided between adjacent first water channels 114a, and the explosion-proof valve 111a of the battery cell 111 is located on the side of the battery cell 111 facing the first water channel 114a, that is, the explosion-proof valve 111a is positioned facing the exhaust channel 128. When the battery cell 111 experiences thermal runaway, the explosion-proof valve 111a of the battery cell 111 can open, venting high-temperature and high-pressure gas and solid particles, allowing the high-temperature and high-pressure gas and solid particles to be quickly discharged to the outside of the housing 113 through the exhaust channel 128. At the same time, both the explosion-proof valve 111a and the exhaust channel 128 are located on one side of the bottom of the battery cell 111. When the battery cell 111 experiences thermal runaway, it can prevent the ejected high-temperature and high-pressure gas or solid particles from contacting the terminal post or busbar at the top of the battery cell 111, thereby achieving no contact between the high-temperature gas and the high-voltage circuit, achieving the effect of thermoelectric separation, and thus improving the safety of the battery pack. Furthermore, the projection of the explosion-proof valve 111a along the height direction of the battery pack is located within the projection range of the exhaust channel 128, so that the high-temperature and high-pressure gas or fixed particles ejected from the battery cell 111 through the explosion-proof valve 111a can be discharged into the exhaust channel 128, avoiding external splashing and damage to other components in the battery pack.

[0084] The exhaust channel 128 can be recessed relative to the bottom wall of the housing 113, that is, the exhaust channel 128 can be a groove structure provided on the bottom wall of the housing 113.

[0085] In the above embodiments, such as Figure 3 and Figure 4 As shown, a crossbeam 123 can also be provided on the housing 113. The crossbeam 123 is located between adjacent isolation plates 115 and is used to separate adjacent battery cells 111 to prevent damage to the battery cells 111 due to shaking, thereby improving the protection effect of the battery cells 111. In addition, the crossbeam 123 can be fixedly connected to the bottom wall of the housing 113, thereby improving the reliability of the connection between the crossbeam 123 and the bottom wall of the housing 113 and preventing the crossbeam 123 from falling off.

[0086] In this embodiment, the crossbeam 123 and the bottom wall of the housing 113 can be welded together. In other embodiments, the crossbeam 123 and the bottom wall of the housing 113 can also be connected in other ways.

[0087] In the above embodiments, as Figure 3 , Figure 9 and Figure 10 As shown, along the height direction of the battery pack 11, a pressure strip 118 is also provided between the cover 112 and the battery cell 111, and the pressure strip 118 abuts against the upper surface of the battery cell 111. Along the height direction of the battery pack 11, the pressure strip 118 includes a first insulating layer 118a, a reinforcing layer 118b, a second insulating layer 118c, and an insulating snap-fit ​​layer 118d stacked sequentially, and the insulating snap-fit ​​layer 118d snaps between adjacent battery cells 111.

[0088] In this embodiment, to prevent resonance during the battery pack 11's lifespan, a pressure strip 118 is installed above the battery cell 111 during the manufacturing process to restrict the movement of the battery cell 111 within the housing 113. The pressure strip 118 is composed of a stacked first insulating layer 118a, a reinforcing layer 118b, a second insulating layer 118c, and an insulating snap-fit ​​layer 118d, which increases the creepage distance of the battery cell 111, enhances the insulation protection effect, and thus improves the safety of the battery pack 11.

[0089] By incorporating a reinforcing layer 118b within the pressure strip 118, the overall strength of the pressure strip 118 is enhanced, thereby further improving the fixation effect on the battery cell 111. Furthermore, the inclusion of an insulating snap-fit ​​layer 118d, which snaps between adjacent battery cells 111, improves the installation stability of the pressure strip 118 and prevents it from detaching during use.

[0090] like Figure 1 and Figure 2 As shown, when the battery pack 11 in this embodiment is installed on the chassis 12 of the vehicle 1, the cover of the battery pack 11 can also serve as the floor of the vehicle 1. Compared with the battery pack of the vehicle installed on the floor of the vehicle in the related art, this embodiment can reduce redundant structure, increase the driving range of the vehicle 1, and achieve the effects of weight reduction and cost reduction.

[0091] In the above embodiments, such as Figures 1 to 3 As shown, the chassis 12 may also include a sill beam 121, which abuts against the side wall of the housing 113. The chassis 12 may also include a seat mounting beam 122, which is fixedly connected to the cover 112.

[0092] In this embodiment, the sill beams 121 on the left and right sides of the chassis 12 can abut against the side walls of the housing 113. Compared with the related technology where the sill beams are installed on the floor and then abut against the side walls of the housing through multiple brackets, this embodiment can increase the contact area between the sill beams 121 and the side walls of the housing 113. When the vehicle 1 is subjected to external impact, the pressure on the side walls of the housing 113 is reduced, and the impact load can be easily transmitted, further improving the protection effect of the battery pack 11 and also improving the side impact resistance of the vehicle 1.

[0093] In addition, the cover 112 of the battery pack 11 is also used as the floor of the vehicle 1, so that the seat mounting beam 122 can be directly fixedly connected to the cover 112. While ensuring the normal installation of the seat mounting beam 122, it can also reduce the number of parts, reduce production costs and vehicle weight. Moreover, after eliminating the floor, the placement space of the battery pack 11 is increased, which can effectively improve the utilization rate of the vehicle space and reduce the probability of damage to the battery pack 11.

[0094] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery pack, characterized in that, The battery pack includes battery cells, a cover, and a housing, with an accommodating space between the cover and the housing, and the battery cells are housed within the accommodating space; The housing is provided with a combined water channel, which includes a first water channel and a second water channel. The first water channel is parallel to the bottom wall of the battery cell, and the second water channel is parallel to the side wall of the battery cell.

2. The battery pack according to claim 1, characterized in that, At least part of the bottom wall of the box is a hollow structure for forming the first waterway; The enclosure includes at least one hollow partition plate for forming the second waterway; the partition plate is fixedly connected to the bottom wall of the enclosure.

3. The battery pack according to claim 2, characterized in that, The battery cell is located between adjacent isolation plates.

4. The battery pack according to claim 1, characterized in that, The housing is provided with multiple combined water channels, and the projection of the second water channel in any of the combined water channels along the height direction of the battery pack is located within the projection range of the first water channel; the first water channel and the second water channel in the combined water channel are interconnected. Along the length of the battery pack, the combined water channel has a first end and a second end that are arranged opposite to each other, and the plurality of combined water channels are isolated from each other at the first end and interconnected at the second end.

5. The battery pack according to claim 4, characterized in that, The container is also provided with a third waterway, which is located between adjacent first waterways and is used to connect the adjacent first waterways.

6. The battery pack according to claim 4, characterized in that, The box body has an inlet and an outlet on its side wall facing the first end; the combined water channel has a through hole that connects the first water channel and the second water channel. The inlet is connected to the first waterway of a portion of the combined waterway, and the outlet is connected to the first waterway of another portion of the combined waterway.

7. The battery pack according to claim 4, characterized in that, The battery cell is equipped with an explosion-proof valve, which is located on the side of the battery cell facing the first water channel; An exhaust channel is provided between adjacent first water channels, and the exhaust channel is recessed relative to the bottom wall of the housing; the projection of the explosion-proof valve along the height direction of the battery pack is located within the projection range of the exhaust channel.

8. The battery pack according to any one of claims 1-7, characterized in that, The battery pack also includes a pressure strip, which abuts against the upper surface of the battery cell; Along the height direction of the battery pack, the pressure strip includes a first insulating layer, a reinforcing layer, a second insulating layer, and an insulating snap-fit ​​layer stacked sequentially; the insulating snap-fit ​​layer snaps between adjacent battery cells.

9. A vehicle, characterized in that, The vehicles include: Chassis; The battery pack is the battery pack according to any one of claims 1-8; The battery pack is mounted on the chassis.

10. The vehicle according to claim 9, characterized in that, The chassis also includes a sill beam, which abuts against the side wall of the box body; The chassis also includes a seat mounting beam, which is fixedly connected to the cover.

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