Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle, and particularly relates to the technical field of batteries. The battery pack comprises a plurality of stacked battery cell units, a plurality of liquid cooling plates and a plurality of first heat insulation parts. Wherein each battery cell unit is provided with two opposite side surfaces, the liquid cooling plate is positioned on one side surface of every two battery cell units, the first heat insulation part is positioned on the other side surface of every two battery cell units, and the first heat insulation part and the liquid cooling plate are arranged at an interval. Therefore, the liquid cooling plate is arranged on one side surface of the battery cell unit in the battery pack to realize active protection, and the first heat insulation piece is arranged on the other side surface of the battery cell unit to realize passive protection. The spreading of thermal runaway can be blocked, the surrounding adjacent battery cell units are prevented from being triggered, the influence of thermal runaway is reduced, and thus all-around protection is realized.

Description

Technical Field

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

[0002] With technological advancements and increasing demand for renewable energy, the new energy vehicle sector has experienced rapid development. Among these components, the power battery, as a key core component of new energy vehicles, is undeniably crucial.

[0003] In actual vehicle use, especially in high-temperature environments, power batteries are more prone to heat accumulation, leading to an overall temperature increase. If the heat is not dissipated in time and accumulates rapidly inside the battery, once a critical value is exceeded, the battery may experience leakage, smoke, or even thermal runaway. Therefore, people are paying increasing attention to the safety of power batteries.

[0004] However, current battery pack structures primarily protect against thermal runaway by using insulating materials, blocking heat propagation, employing explosion-proof valves for pressure relief, and using sensor alarms. These existing methods are insufficient for comprehensive, multi-layered protection of the battery pack. When a cell within the pack experiences thermal runaway, a short circuit may occur, potentially leading to a fire or explosion. The protection efficiency of battery packs still needs improvement. Utility Model Content

[0005] This application provides a battery pack and a vehicle. A liquid cooling plate is installed on one side of the battery cell unit in the battery pack for active protection, and a first heat insulation component is installed on the other side of the battery cell unit for passive protection. This can prevent the spread of thermal runaway, avoid triggering of surrounding adjacent battery cells, reduce the impact of thermal runaway, and thus achieve all-round protection.

[0006] The first aspect of this application provides a battery pack, comprising:

[0007] Several stacked battery cell units, each battery cell unit having two oppositely arranged sides;

[0008] Several liquid cooling plates are located on one side of every two battery cells;

[0009] Several first heat insulation elements are located on the other side of every two battery cells, and the first heat insulation elements and the liquid cooling plate are spaced apart.

[0010] The battery pack provided in the first aspect of this application includes a plurality of stacked battery cell units, a plurality of liquid cooling plates, and a plurality of first heat insulation components. Each battery cell unit has two oppositely arranged sides. The liquid cooling plate is located on one side of every pair of battery cell units, and the first heat insulation component is located on the other side of every pair of battery cell units, with the first heat insulation component and the liquid cooling plate spaced apart. Thus, the liquid cooling plate is located on one side of each battery cell unit in the battery pack for active protection, while the first heat insulation component is located on the other side for passive protection. This effectively prevents the spread of thermal runaway, avoids triggering in adjacent battery cell units, reduces the impact of thermal runaway, and achieves comprehensive protection.

[0011] In one possible implementation, each cell unit also has a top surface and a bottom surface disposed opposite to each other, and the top surface is provided with two pole posts;

[0012] The electrode post is equipped with a connecting piece, which is electrically connected to the electrode post.

[0013] In one possible implementation, a fireproof cloth is laid on the side of the connecting piece facing away from the battery cell unit;

[0014] The fireproof cloth is positioned in the first direction of the battery pack.

[0015] In one possible implementation, it also includes: a temperature sensor and a flexible circuit board;

[0016] The flexible circuit board is attached to the top surface of the battery cell unit, and the temperature sensor is located on the flexible circuit board. The temperature sensor is used to collect the temperature of the top surface of the battery cell unit.

[0017] In one possible implementation, it further includes: a cooling pipe;

[0018] The cooling pipe is arranged along the first direction of the battery pack and passes through each liquid cooling plate so that the cooling pipe and each liquid cooling plate are connected.

[0019] In one possible implementation, each cell unit also has a third side and a fourth side disposed opposite to each other, and a second heat insulation element is provided on the third side and / or the fourth side.

[0020] The second heat insulation element is arranged perpendicularly to the first heat insulation element.

[0021] In one possible implementation, each cell unit is further provided with a first explosion-proof valve on its top surface, the first explosion-proof valve being located between two pole posts.

[0022] In one possible implementation, it also includes: a box body and a box lid;

[0023] Several battery cells are located in the enclosure, and the enclosure cover is placed on top of the battery cells. There is an exhaust gap between the enclosure cover and the battery cells to form a gas passage.

[0024] In one possible implementation, it further includes: at least two second explosion-proof valves;

[0025] The second explosion-proof valve is located on at least one side of the enclosure.

[0026] A second aspect of this application provides a vehicle including the aforementioned battery pack.

[0027] It should be understood that the second aspect of this application corresponds to the technical solution of the first aspect of this application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation are similar, and will not be repeated here.

[0028] In addition to the technical problems solved by this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by a battery pack and vehicle provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific embodiments. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a partial structural schematic diagram of the battery pack provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of another part of the structure of the battery pack provided in the embodiments of this application;

[0032] Figure 3 This is a schematic diagram of another part of the structure of the battery pack provided in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram of the overall structure of the battery pack provided in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100-battery pack;

[0036] 200 - Battery cell unit; 210 - First side surface; 220 - Second side surface; 230 - Top surface; 231 - Terminal post; 232 - First explosion-proof valve; 240 - Bottom surface; 250 - Third side surface; 260 - Fourth side surface;

[0037] 300 - Liquid cooling plate; 310 - Through hole; 320 - Cooling pipe;

[0038] 400 - First thermal insulation component; 410 - Second thermal insulation component;

[0039] 500-Connecting piece;

[0040] 600-fireproof cloth;

[0041] 700 - Temperature sensor; 710 - Flexible circuit board; 720 - Overlapping piece;

[0042] 800 - Enclosure; 810 - Enclosure cover; 820 - Mica sheet; 830 - Second explosion-proof valve. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0044] As described in the background section, current battery pack structures primarily protect against thermal runaway by using insulating materials, blocking heat propagation, employing explosion-proof valves for pressure relief, and using sensor alarms. However, existing thermal runaway protection methods cannot provide comprehensive, multi-layered protection for the battery pack. When a cell within the battery pack experiences thermal runaway, a short circuit may occur, potentially leading to a fire or explosion. The protection efficiency of the battery pack still needs improvement.

[0045] To address the aforementioned technical problems, a first aspect of this application provides a battery pack. The battery pack includes a plurality of stacked battery cells, a plurality of liquid cooling plates, and a plurality of first heat insulation components. Each battery cell has two oppositely arranged sides. The liquid cooling plate is located on one side of every pair of battery cells, and the first heat insulation component is located on the other side of every pair of battery cells, with the first heat insulation component and the liquid cooling plate spaced apart. Thus, the liquid cooling plate on one side of each battery cell in the battery pack provides active protection, while the first heat insulation component on the other side provides passive protection. This effectively prevents the spread of thermal runaway, avoids triggering of adjacent battery cells, reduces the impact of thermal runaway, and achieves comprehensive protection.

[0046] A second aspect of this application provides a vehicle. The vehicle includes the battery pack described above.

[0047] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] This application provides a battery pack and a vehicle. A liquid cooling plate is installed on one side of the battery cell unit in the battery pack for active protection, and a first heat insulation component is installed on the other side of the battery cell unit for passive protection. This can prevent the spread of thermal runaway, avoid triggering of surrounding adjacent battery cells, reduce the impact of thermal runaway, and thus achieve all-round protection. The specific structure of the battery pack and vehicle provided in this application embodiment will be described below with reference to the accompanying drawings.

[0049] refer to Figure 1 as well as Figure 2 This application provides a battery pack 100 in a first aspect. The battery pack 100 may include a battery cell unit 200, a liquid cooling plate 300, and a first heat insulation member 400. In one possible implementation, such as... Figure 1 As shown, the battery cell unit 200 can be a rectangular structure, and the liquid cooling plate 300 and the first heat insulation component 400 can both be flat structures. This embodiment of the application does not limit the shapes of the battery cell unit 200, the liquid cooling plate 300, and the first heat insulation component 400. Furthermore, the number of battery cell units 200, liquid cooling plates 300, and the first heat insulation component 400 can all be multiple. This embodiment of the application also does not limit the number of battery cell units 200, liquid cooling plates 300, and the first heat insulation component 400. In this embodiment, multiple battery cell units 200 can be stacked sequentially in the first direction and the second direction to form a battery pack 100.

[0050] It should be noted that, for ease of description, in this embodiment, the first direction can be the length direction of the battery pack 100, i.e. Figure 1 The x-direction. The second direction can be the width direction of the battery pack 100, i.e. Figure 1 The y-direction in the equation. The first and second directions are perpendicular.

[0051] Based on the above embodiments, each battery cell 200 may have two sides, which may be arranged opposite to each other. In this embodiment, the liquid cooling plate 300 may be located on one side of every two battery cell units 200, while the first heat insulation member 400 may be located on the other side of every two battery cell units 200. The first heat insulation member 400 and the liquid cooling plate 300 are spaced apart, so that the first heat insulation member 400 and the liquid cooling plate 300 are alternately arranged in the gaps between several stacked battery cell units 200. It can be understood that in this way, one side of each battery cell 200 is attached to the liquid cooling plate 300, and the other side is attached to the first heat insulation member 400, thereby blocking the spread of thermal runaway, preventing the surrounding adjacent battery cell units 200 from being triggered, reducing the impact of thermal runaway, and achieving all-round protection.

[0052] Continue to refer to Figure 1 Based on the above embodiments, in one possible implementation, the two sides may include a first side 210 and a second side 220, and the first side 210 and the second side 220 are disposed opposite to each other. The liquid cooling plate 300 may be located on the first side 210 of every two battery cells 200, while the first heat insulation member 400 may be located on the second side 220 of every two battery cells 200. Alternatively, the liquid cooling plate 300 may be located on the second side 220 of every two battery cells 200, while the first heat insulation member 400 may be located on the first side 210 of every two battery cells 200. Taking two adjacent battery cells 200 as an example, the first side 210 of one battery cell 200 is in contact with the liquid cooling plate 300, and the second side 220 is in contact with the first heat insulation member 400. Correspondingly, the first side 210 of another cell unit 200 is attached to the first heat insulation member 400, and the second side 220 is attached to the liquid cooling plate 300, so that the first heat insulation member 400 and the liquid cooling plate 300 are spaced apart to avoid the first heat insulation member 400 and the liquid cooling plate 300 being located in the same gap between two adjacent cell units 200 at the same time.

[0053] Continue to refer to Figure 1Based on the above embodiments, each cell unit 200 may further have a top surface 230 and a bottom surface 240. The top surface 230 and bottom surface 240 are arranged opposite to each other. In one possible implementation, the top surface 230 may be provided with a terminal post 231. In this embodiment, each cell unit 200 may have two terminal posts 231. Both terminal posts 231 may be electrically connected to the cell unit 200. In one possible implementation, the terminal post 231 may also be provided with a connecting piece 500, and the number of connecting pieces 500 may be the same as the number of terminal posts 231, with each connecting piece 500 corresponding to each terminal post 231. It is understood that each connecting piece 500 may be electrically connected to a corresponding terminal post 231. In the entire battery pack 100, the number of connecting pieces 500 and terminal posts 231 may both be several. In the first direction, several connecting pieces 500 may be arranged in rows on the top surface 230 of several cell units 200.

[0054] Continue to refer to Figure 1 Based on the above embodiments, each cell unit 200 may also be provided with a first explosion-proof valve 232 on its top surface 230. The first explosion-proof valve 232 may be located between two terminals 231. It is understood that when thermal runaway occurs in a cell unit 200 within the battery pack 100, the internal pressure of the cell unit 200 will rise sharply. At this time, the first explosion-proof valve 232 on the cell unit 200 will be open, and the cell unit 200 will eject ejected material through the first explosion-proof valve 232. This ejected material may have high temperature, high pressure, and conductivity. The opening of the first explosion-proof valve 232 can effectively reduce the internal pressure of the cell unit 200, thereby reducing the impact of thermal runaway.

[0055] Continue to refer to Figure 2 Based on the above embodiments, a fireproof cloth 600 can be laid on the side of the connecting piece 500 facing away from the cell unit 200. The fireproof cloth 600 can be arranged in rows along the first direction of the battery pack 100, allowing it to be attached to several connecting pieces 500 along the first direction. In this embodiment, two rows of fireproof cloth 600 can be located on either side of the first explosion-proof valve 232. It is understood that the fireproof cloth 600 can be used to prevent damage from flames and high temperatures, and is typically used in welding, cutting, and other high-temperature working environments to protect equipment and personnel. When the battery pack 100 experiences thermal runaway, the ejected material from the cell unit 200 through the first explosion-proof valve 232 can easily cause high-voltage arcing and may also cause a short circuit. The fireproof cloth 600 can effectively isolate conductive components from contact, preventing the ejected material from contacting the connecting piece 500, thereby effectively avoiding high-voltage arcing.

[0056] refer to Figure 3Based on the above embodiments, the battery pack 100 may further include a temperature sensor 700 and a flexible circuit board 710. In this embodiment, the flexible circuit board 710 may be attached to the top surface 230 of the cell unit 200, and may be located between two rows of connecting pieces 500, while the temperature sensor 700 may be located on the flexible circuit board 710. It is understood that the temperature sensor 700 can be used to collect the temperature of the top surface 230 of the cell unit 200. Thus, when the cell unit 200 attached to the liquid cooling plate 300 experiences thermal runaway or a significant temperature rise, the temperature sensor 700 can detect the temperature signal, thereby sending the collected abnormal signal to the vehicle end through the battery management system. The vehicle end then issues commands to activate liquid cooling and cut off high voltage, transferring the heat from the cell unit 200 to the outside of the battery pack 100 through the liquid cooling plate 300, and stopping the charging and discharging process of the cell unit 200, achieving active protection against thermal runaway and cooling.

[0057] Continue to refer to Figure 3 Based on the above embodiments, the connecting piece 500 can be connected to the flexible circuit board 710 via the overlapping piece 720. In one possible implementation, the number of overlapping pieces 720 can be several, and one overlapping piece 720 can correspond to two connecting pieces 500; this application embodiment does not impose any limitations. In this application embodiment, the overlapping piece 720 can be a nickel sheet or other material, and the overlapping piece 720 can be electrically connected to the connecting piece 500 by means of welding or other methods.

[0058] Continue to refer to Figure 3 Based on the above embodiments, the battery pack 100 may further include a cooling pipe 320. The cooling pipe 320 may also be arranged along the first direction of the battery pack 100. In this embodiment, the number of cooling pipes 320 may be two, and the two cooling pipes 320 may be located at opposite ends of the battery pack 100 in the second direction. In one possible implementation, each liquid cooling plate 300 may have a through hole 310, allowing the cooling pipe 320 to pass through the through hole 310 into each liquid cooling plate 300, thereby connecting the cooling pipe 320 to each liquid cooling plate 300. In this way, coolant can be sequentially injected into each liquid cooling plate 300 through the cooling pipe 320, thereby enabling the liquid cooling plate 300 to cool the cell unit 200 and realize the liquid cooling function of the battery pack 100.

[0059] Continue to refer to Figure 1Based on the above embodiments, each battery cell 200 may further have a third side 250 and a fourth side 260, wherein the third side 250 and the fourth side 260 may be arranged opposite to each other, and the area of ​​the first side 210 and the second side 220 is larger than that of the third side 250 and the fourth side 260. Thus, the first side 210, the second side 220, the third side 250, the fourth side 260, the top surface 230, and the bottom surface 240 may form a rectangular structure of the battery cell 200. In one possible implementation, a second heat insulation member 410 may also be provided on the third side 250 and / or the fourth side 260, wherein the second heat insulation member 410 and the first heat insulation member 400 may be arranged perpendicularly. It is understood that the second heat insulation member 410 may be located on the third side 250, or the second heat insulation member 410 may be located on the fourth side 260, or the second heat insulation member 410 may be located on both the third side 250 and the fourth side 260. In this embodiment, the second heat insulation member 410 may be located in the gap between two adjacent battery cells 200.

[0060] It is understood that, exemplarily, both the first thermal insulation element 400 and the second thermal insulation element 410 can be made of aerogel. It is understood that aerogel has good thermal insulation properties. Thus, when a single battery cell 200 experiences abnormal temperature rise or heat diffusion, the aerogel disposed between the battery cells 200 can prevent heat spread from the battery cell 200, thereby minimizing the risk of triggering adjacent battery cells 200.

[0061] refer to Figure 4 Based on the above embodiments, the battery pack 100 may further include a housing 800 and a cover 810. In one possible implementation, the housing 800 may be rectangular, and the cover 810 may be flat; this application does not impose such limitations. In this application embodiment, several battery cell units 200 may be located within the housing 800, and the cover 810 may be placed over the battery cell units 200, thereby providing a certain degree of protection for the battery cell units 200. In one possible implementation, an exhaust gap may be present between the cover 810 and the battery cell units 200, thus forming a gas passage.

[0062] Based on the above embodiments, in one possible implementation, the venting gap between the cover 810 and the battery cell unit 200 can be less than or equal to 6 mm. For example, the venting gap between the cover 810 and the battery cell unit 200 is 6 mm. Additionally, a heat-resistant sheet, which can be a mica sheet 820, can be attached to the side of the cover 810 facing the battery cell unit 200 to protect the top surface 230 of the battery cell unit 200.

[0063] Continue to refer to Figure 4 Based on the above embodiments, the battery pack 100 may further include a second explosion-proof valve 830. In one possible implementation, the number of second explosion-proof valves 830 may be at least two; however, this embodiment does not limit the number of second explosion-proof valves 830. In this embodiment, two second explosion-proof valves 830 are used as an example. The two second explosion-proof valves 830 may be located on at least one side of the housing 800; this embodiment also does not limit this. When the battery cell 200 experiences thermal runaway, the high-temperature, high-pressure ejected material diffuses through the exhaust gap to one end of the battery pack 100. At this time, the second explosion-proof valve 830 is open to discharge the high-temperature, high-pressure ejected material inside the battery pack 100 to the outside of the battery pack 100, preventing heat accumulation inside the battery pack 100.

[0064] This application provides a vehicle (not shown in the figures) in a second aspect. The vehicle may include the battery pack 100 described above.

[0065] In this embodiment, the battery pack 100 provided in this application can have a liquid cooling plate 300 provided on one side of the cell unit 200 in the battery pack 100 to achieve active protection, and a first heat insulation component 400 provided on the other side of the cell unit 200 to achieve passive protection. This can prevent the spread of thermal runaway, avoid triggering of surrounding adjacent cell units 200, reduce the impact of thermal runaway, and thus provide multi-level and all-round protection for the high-rate, highly integrated battery pack 100.

[0066] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0067] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0068] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0069] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0070] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0071] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, include: A plurality of stacked battery cell units, each of the battery cell units having two oppositely arranged sides; A plurality of liquid cooling plates, wherein the liquid cooling plates are located on one side of every two said battery cells; A plurality of first heat insulation elements are provided, the first heat insulation elements being located on the other side of every two said cell units, and the first heat insulation elements and the liquid cooling plate are spaced apart.

2. The battery pack according to claim 1, characterized in that, Each of the battery cells also has a top surface and a bottom surface disposed opposite to each other, and the top surface is provided with two terminals; The electrode post is provided with a connecting piece, and the connecting piece is electrically connected to the electrode post.

3. The battery pack according to claim 2, characterized in that, The side of the connecting piece facing away from the battery cell unit is covered with fireproof cloth; The fireproof cloth is disposed in the first direction of the battery pack.

4. The battery pack according to claim 2, characterized in that, Also includes: Temperature sensors and flexible circuit boards; The flexible circuit board is attached to the top surface of the battery cell unit, and the temperature sensor is located on the flexible circuit board and is used to collect the temperature of the top surface of the battery cell unit.

5. The battery pack according to claim 3, characterized in that, Also includes: Cooling pipes; The cooling pipe is arranged along the first direction of the battery pack, and the cooling pipe passes through each of the liquid cooling plates so that the cooling pipe and each of the liquid cooling plates are connected.

6. The battery pack according to claim 5, characterized in that, Each of the battery cells also has a third side and a fourth side disposed opposite to each other, and the third side and / or the fourth side is further provided with a second heat insulation element; The second heat insulation component is arranged perpendicularly to the first heat insulation component.

7. The battery pack according to any one of claims 2-6, characterized in that, Each of the battery cells is also provided with a first explosion-proof valve on its top surface, the first explosion-proof valve being located between the two pole posts.

8. The battery pack according to any one of claims 2-6, characterized in that, Also includes: Box body and lid; Several battery cells are located in the housing, the housing cover is placed on the battery cells, and there is an exhaust gap between the housing cover and the battery cells to form a gas passage.

9. The battery pack according to claim 8, characterized in that, Also includes: At least two secondary explosion-proof valves; The second explosion-proof valve is located on at least one side of the enclosure.

10. A vehicle, characterized in that, Includes the battery pack described in any one of claims 1-9.

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