Battery pack and automobile
By setting up parts and explosion -proceed valves inside the battery box, and setting out the exhaust port, the risk of rising temperatures and cooling liquids under the condition of super fast charging conditions is solved, and more effective thermal management and safety are achieved. Protect.
Patent Information
- Application Number
- CN202323364513.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-08
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-08
AI Technical Summary
It is difficult to effectively suppress the rise in the battery pack temperature under super fast charging conditions, and the immersion cooling method has the risk of ignition of coolant and reducing cooling effect.
By setting up partitions in the internal space of the battery pack, the separation of it is separated as the battery cell and exhaust cavity. One end with an explosion -proof valve is set to be replaced by the separator. Corresponding settings of the port, the side wall of the exhaust cavity has an exhaust port connected to the external environment, and the exhaust port and the pass are dislocated.
Effectively avoid the high -temperature gas sprayed by the battery cells into the battery cell, prevent high temperature gas from lit the coolant, keep the space of the coolant is not crowded, avoid the risk of atomization and degeneration, and ensure the protection of the battery explosion valve.
Smart Images
Figure CN222422254U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile parts, and in particular to a battery pack and an automobile. Background Art
[0002] With the development of the new energy vehicle industry, super-fast charging of battery packs has gradually become a development trend. Due to the large current and high heat generation of super-fast charging, the thermal management method of traditional battery packs using liquid cooling plates has made it difficult to quickly and effectively suppress the rise in battery pack temperature. Immersion cooling is a new type of thermal management method that has developed in recent years with the development of super-fast charging. The main method is to immerse all the battery cells in the insulating coolant of the battery pack body. Through the flow of coolant, the cooling of the entire body of the battery cell is achieved. It has a large cooling area and a good cooling effect.
[0003] However, the immersion cooling method also has corresponding defects. Since the immersion cooling liquid is usually a hydrocarbon, the temperature of the battery cell during thermal runaway (generally greater than 600°C) is higher than the ignition point of the immersion cooling liquid (about 200°C). Therefore, the battery pack using immersion cooling is at risk of igniting the coolant. In addition, when the battery cell experiences thermal runaway, the battery cell will instantly spray a large amount of gas through the explosion-proof valve, causing the gas to occupy a large amount of box space, squeezing out the original liquid space, resulting in a reduction in the original cooling effect. Moreover, when the pressure relief valve on the box meets the opening pressure, the gas ejected from the battery cell will be sprayed out together with the cooling liquid, causing the liquid to atomize on the outside of the box. The atomized hydrocarbons are prone to deflagration when exposed to open flames. Utility Model Content
[0004] The utility model aims to solve at least one of the above technical problems.
[0005] To solve the above problems, the utility model provides a battery pack, comprising a box body and a battery cell, the internal space of the box body is divided into a battery cell cavity and an exhaust cavity by a partition, the battery cell comprises a battery cell body and an explosion-proof valve arranged at one end of the battery cell body, the battery cell body is located in the battery cell cavity, and the battery cell body is provided with one end of the explosion-proof valve abutting the partition, the partition is provided with a through opening corresponding to the explosion-proof valve, the side wall of the exhaust cavity is provided with an exhaust port connected to the external environment, and the exhaust port is staggered with the through opening.
[0006] Compared with the prior art, the battery pack provided by the present invention has but is not limited to the following technical effects:
[0007] The internal space of the battery pack box is divided into a cell cavity and an exhaust cavity by a partition. The cell cavity can be used to arrange the battery cell and the coolant, and one end of the battery cell body provided with an explosion-proof valve can be abutted against the partition. Since the partition is provided with a through hole corresponding to the explosion-proof valve, when the battery cell has thermal runaway, the gas ejected from the battery cell through the explosion-proof valve will enter the exhaust cavity through the through hole, and then be discharged to the external environment from the exhaust port of the exhaust cavity. In this way, the high-temperature gas ejected from the battery cell can be prevented from entering the cell cavity, and the ejected high-temperature gas can be prevented from igniting the coolant, and the original space of the coolant will not be squeezed, and the coolant will not be atomized when discharged from the box with the high-temperature gas. Moreover, since the exhaust port and the through hole are staggered, that is, the explosion-proof valve is not exposed at the exhaust port, the box can still cover and protect the explosion-proof valve of the battery cell like a traditional battery pack box.
[0008] Furthermore, the plurality of battery cells are sequentially arranged in the battery cell cavity along a set direction, the separator is sequentially provided with a plurality of through openings along the set direction, and the plurality of through openings are arranged in one-to-one correspondence with the explosion-proof valves of the plurality of battery cells.
[0009] Furthermore, the battery cell is a square battery cell, and the two electrode terminals of the square battery cell are both located at a first set end of the battery cell body, and the explosion-proof valve is located at the first set end.
[0010] Furthermore, the battery cell is a blade battery cell, so that the two electrode terminals of the blade battery cell are respectively located at the first set end and the second set end of the battery cell body, the first set end and the second set end are the two ends of the battery cell body that are farthest apart, and the two explosion-proof valves are respectively located at the first set end and the second set end.
[0011] Furthermore, the battery cell is a cylindrical battery cell, and the explosion-proof valve is located at the negative electrode cover plate of the cylindrical battery cell.
[0012] Furthermore, the box body includes a box body having an opening at at least one end and a box cover, the box cover is used to cover the opening of the box body, and the box cover is arranged opposite to the electrode terminal, when the explosion-proof valve and the electrode terminal are at the same end of the battery body, the separator is arranged on the box cover, when the explosion-proof valve and the electrode terminal are at different ends of the battery body, the separator is arranged in the box body.
[0013] Furthermore, the side walls of the battery cell cavity are respectively provided with a liquid inlet and a liquid outlet.
[0014] Furthermore, the liquid inlet is arranged at the first side wall of the battery cell cavity, and the liquid outlet is arranged at the second side wall of the battery cell cavity, the first side wall and the second side wall are the two side walls of the battery cell cavity that are oppositely arranged and farthest apart, and the projection position of the liquid inlet on the second side wall and the liquid outlet are respectively located at two ends of the second side wall.
[0015] Furthermore, the exhaust port is arranged at a side wall of the exhaust cavity which is perpendicular to the horizontal direction of the automobile.
[0016] The utility model also provides a car, comprising the battery pack as mentioned above.
[0017] Since the technical improvements and technical effects of the automobile are the same as those of the battery pack, the automobile will not be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The structure of the battery pack with square cells in the embodiment of the utility model is shown in FIG. Figure 1 ;
[0019] Figure 2 for Figure 1 A schematic diagram of the partial structure of the middle box cover when viewed from above;
[0020] Figure 3 for Figure 1 A schematic diagram of the side structure of the middle box cover;
[0021] Figure 4 The structure of the battery pack with square cells in the embodiment of the utility model is shown in FIG. Figure 2 ;
[0022] Figure 5 for Figure 4 The structural diagram of the middle box body;
[0023] Figure 6 The structure of the battery pack with square cells in the embodiment of the utility model is shown in FIG. Figure 3 ;
[0024] Figure 7 The structure of the battery pack with blade cells according to the embodiment of the utility model is shown in FIG. Figure 1 ;
[0025] Figure 8 The structure of the battery pack with blade cells according to the embodiment of the utility model is shown in FIG. Figure 2 ;
[0026] Fig. 9 It is a schematic structural diagram of a battery pack with cylindrical cells according to an embodiment of the utility model;
[0027] Fig.10This is a schematic diagram of the structure in which the cylindrical battery cell of the embodiment of the utility model is arranged in the box body;
[0028] Fig.11 This is a structural schematic diagram of an explosion-proof valve provided on the top of a square battery cell according to an embodiment of the utility model;
[0029] Fig.12 This is a structural schematic diagram of an explosion-proof valve provided at the bottom of a square battery cell according to an embodiment of the utility model.
[0030] Description of reference numerals:
[0031] 1. Box body; 11. Box body; 12. Box cover; 13. Partition; 131. Through port; 14. Cell cavity; 141. Liquid inlet; 142. Liquid outlet; 15. Exhaust cavity; 21. Cell body; 22. Explosion-proof valve; 23. Electrode terminal. DETAILED DESCRIPTION
[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0033] In the description of the present invention, it should be understood that the terms "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0034] Moreover, the X-axis represents the longitudinal direction, that is, the front-to-back direction, and the positive direction of the X-axis represents the front, and the negative direction of the X-axis represents the back; the Z-axis represents the vertical direction, that is, the up-down direction, and the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom; the Y-axis represents the lateral direction, that is, the left-right direction, and the positive direction of the Y-axis represents the left, and the negative direction of the Y-axis represents the right. It should also be noted that the aforementioned X-axis, Z-axis, and Y-axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.
[0035] See also Figure 1A battery pack according to an embodiment of the utility model comprises a box body 1 and a battery cell. The internal space of the box body 1 is divided into a battery cell cavity 14 and an exhaust cavity 15 by a partition 13. The battery cell comprises a battery cell body 21 and an explosion-proof valve 22 arranged at one end of the battery cell body 21. The battery cell body 21 is located in the battery cell cavity 14, and one end of the battery cell body 21 provided with the explosion-proof valve 22 abuts against the partition 13. The partition 13 is provided with a through-port 131 corresponding to the explosion-proof valve 22. The side wall of the exhaust cavity 15 is provided with an exhaust port connected to the external environment, and the exhaust port is staggered with the through-port 131.
[0036] In the present embodiment, the internal space of the battery pack case 1 is divided into a cell cavity 14 and an exhaust cavity 15 by a partition 13. The cell cavity 14 can be used to arrange the cell and the coolant, and one end of the cell body 21 provided with the explosion-proof valve 22 can be abutted against the partition 13. Since the partition 13 is provided with a through port 131 corresponding to the explosion-proof valve 22, when the cell has thermal runaway, the gas ejected from the cell through the explosion-proof valve 22 will enter the exhaust cavity 15 through the through port 131, and then be discharged to the external environment from the exhaust port of the exhaust cavity 15. In this way, the high-temperature gas ejected from the cell can be prevented from entering the cell cavity 14, and the ejected high-temperature gas can be prevented from igniting the coolant, and the original space of the coolant will not be occupied, and the coolant will not be atomized when discharged from the case 1 with the high-temperature gas. Moreover, since the exhaust port and the through opening 131 are arranged in a staggered manner, that is, the explosion-proof valve 22 is not exposed at the exhaust port, the box body 1 can still cover and protect the explosion-proof valve 22 of the battery cell like a traditional battery pack box body.
[0037] It should be noted that the end of the cell body 21 inside the cell cavity 14 provided with the explosion-proof valve 22 is in abutment relationship (or a fitting relationship) with the separator 13, which can prevent the coolant in the cell cavity 14 from entering the exhaust cavity 15 through the opening 131, and also prevent the high-temperature gas ejected through the explosion-proof valve 22 from entering the cell cavity 14. Of course, in order to further ensure the sealing relationship between the end of the cell body 21 provided with the explosion-proof valve 22 and the separator 13, a sealant can be provided between the two.
[0038] Optionally, the exhaust port is arranged at a side wall of the exhaust cavity 15 which is perpendicular to the horizontal direction of the automobile.
[0039] In this embodiment, Figure 1As shown, for example, the partition 13 is in contact with the side wall of one end of the battery cell provided with the explosion-proof valve 22, that is, a through hole 131 is provided on the bottom side wall. Assuming that the exhaust port and the through hole 131 are not misaligned, that is, the exhaust port and the through hole 131 are correspondingly provided, then the exhaust port is provided on the top wall of the exhaust cavity 15, and is provided opposite to the through hole 131. If the exhaust port is provided in this way, the high-temperature gas ejected from the battery cell through the explosion-proof valve 22 will be directly discharged upward through the exhaust port. The high-temperature gas is directly discharged upward to the vehicle body structure, which will cause certain damage to the vehicle body structure, and it is not conducive to the circulation and diffusion of the gas after being discharged from the exhaust port. Secondly, assuming that the exhaust port and the through hole 131 are not misaligned, if an external object falls into the exhaust port, it will directly hit the explosion-proof valve 22 of the battery cell, and the explosion-proof valve 22 of the battery cell is equivalent to being exposed to the outside, which is insufficient in safety. Based on the above considerations, in this embodiment, the exhaust port is provided at the side wall of the exhaust cavity 15 perpendicular to the horizontal direction of the car. Figure 3 As shown, the front end wall and the rear end wall of the exhaust chamber 15 may have exhaust ports.
[0040] Optionally, the plurality of battery cells are sequentially arranged in the battery cell cavity 14 along a set direction, the partition 13 is sequentially provided with a plurality of the through openings 131 along the set direction, and the plurality of through openings 131 are arranged one-to-one correspondingly to the explosion-proof valves 22 of the plurality of battery cells.
[0041] In this embodiment, multiple cells can be arranged along a set direction, such as Figure 1-3 As shown, they can be arranged in sequence along the front-to-back direction to form a module. Figure 2 As shown, the partition 13 is also provided with a plurality of openings 131 in sequence along the front-to-back direction, and the plurality of openings 131 are provided in one-to-one correspondence with the plurality of explosion-proof valves 22. When a certain battery cell experiences thermal runaway, the battery cell will eject high-temperature gas into the exhaust chamber 15 through its own explosion-proof valve 22 and the corresponding opening 131.
[0042] It should be noted that if Figure 1 , Figure 4 , Figure 6-9 As shown, the box body 1 includes a box body 11 with an opening at at least one end and a box cover 12 . The box cover 12 is used to cover the opening of the box body 1 , and the box cover 12 is arranged opposite to the electrode terminal 23 .
[0043] See also Figure 1 Optionally, the battery cell is a square battery cell, and the two electrode terminals 23 of the square battery cell are both located at a first set end of the battery cell body 21, and the explosion-proof valve 22 is located at the first set end.
[0044] In this embodiment, Figure 1As shown, the battery cell can be a square battery cell. In this case, the explosion-proof valve 22 is preferably arranged at the first set end of the battery cell body 21. For example Figure 1 and Fig.11 the top shown, that is, the explosion-proof valve 22 is preferably at the same end of the battery cell body 21 as the electrode terminal 23 of the square battery cell. In this way, the separator 13 can be integrated on the box cover 12, and the box body 11 can be a conventional cubic structure with an open top, that is, the box body 11 can be the same as the box body of a traditional battery pack, and only the separator 13 needs to be integrated on the box cover 12. The design difficulty of the box body 1 is relatively low, and the cost of the battery pack is also relatively low. Among them, the box cover 12 and the separator 13 can be an integral structure or an assembled structure.
[0045] It should be noted that if there is no separator 13, after the box cover 12 covers the open end of the box body 11, a box body space is formed between the box cover 12 and the box body 11. This box body space can be equal to the internal space of the box body 11 itself, or as Figure 1 shown, this box body space can also be larger than the internal space of the box body 11 itself. Among them, the box cover 12 can be a traditional flat plate structure, or as Figure 1 shown, a non-flat structure with a "Ji" shape in cross section; the separator 13 can be a flat plate structure, or as Figure 1 shown, a non-flat structure with an inverted "Ji" shape in cross section.
[0046] In this embodiment, the battery cell can be a square battery cell. The explosion-proof valve 22 is preferably arranged at the first set end of the battery cell body 21. For example Figure 1 and Fig.11 the top shown. Multiple battery cells can be arranged in sequence in the front-back direction. Similarly, as Figure 2 shown, a plurality of through holes 131 are sequentially arranged on the lower side of the separator 13 in the front-back direction.
[0047] In other embodiments, as Figure 4 and Fig.12 shown, it is not excluded that the explosion-proof valve 22 can be arranged at the bottom end of the battery cell body 21 of the square battery cell (the explosion-proof valve 22 is bottom-mounted), or, as Figure 6 shown, it is not excluded that the explosion-proof valve 22 is arranged at the side end of the battery cell body 21 of the square battery cell (the explosion-proof valve 22 is side-mounted), such as the left end or / and the right end. Among them, since the explosion-proof valve 22 is bottom-mounted or side-mounted in the square battery cell, the explosion-proof valve 22 and the two electrode terminals 23 of the square battery cell are on different sides. In this case, the box cover 12 can be the same as the box cover of a traditional battery pack, and the separator 13 needs to be integrated on the box body 11 to form a box body 11 different from the box body of a traditional battery pack. At this time, the separator 13 and the box body 11 can be an integral structure or a combined structure. Among them, Figure 5The schematic diagram of the structure of the box body 11 when the explosion-proof valve 22 is placed at the bottom in the square battery cell. Figure 5 It can be seen that the box body 11 is different from the traditional box body 11 in that the box body 11 includes two rectangular frames, one large and one small, and a partition. The partition blocks the bottom of the large rectangular frame and the top of the small rectangular frame at the same time. The partition is the aforementioned partition 13, and a through opening 131 is provided on the partition.
[0048] See also Figure 7 Optionally, the battery cell is a blade battery cell, and the two electrode terminals 23 of the blade battery cell are respectively located at a first set end and a second set end of the battery cell body 21, the first set end and the second set end are the two ends of the battery cell body 21 that are farthest apart, and the two explosion-proof valves 22 are respectively located at the first set end and the second set end.
[0049] In this embodiment, the battery cell can be a blade battery cell. Since the blade battery cell is more flat and long than the square battery cell, in order to ensure the current density of the battery cell, unlike the square battery cell, the two electrode terminals 23 of the blade battery cell are respectively located at the two ends of the battery cell body 21 that are opposite and farthest apart, that is, the two electrode terminals 23 of the blade battery cell are respectively located as follows Figure 7 The left and right ends shown. Then, the explosion-proof valve 22 is preferably located at the two ends of the battery body 21 that are opposite and farthest apart. In this way, for a battery pack equipped with blade batteries, the box body 11 can be a rectangular shell with open ends on the left and right sides, just like a traditional box body. The difference is that the partitions 13 are respectively integrated on the box cover 12, which makes the design easier and reduces the cost of the battery pack. Among them, the partition 13 can be a box structure located inside the box body 11.
[0050] In other embodiments, Figure 8 As shown, for a battery pack equipped with blade cells, it is not ruled out that the explosion-proof valve 22 is arranged at the bottom end of the cell body 21 , and the partition 13 can be integrated on the box body 11 at this time.
[0051] Specifically, see Figure 6 and Figure 7 , whether for square cells or blade cells, if the explosion-proof valve 22 is placed sideways, there are preferably two explosion-proof valves 22, and the two explosion-proof valves 22 are respectively located at the left and right ends of the cell body 21, and two exhaust chambers 15 are also provided, and the two exhaust chambers 15 correspond to the explosion-proof valves 22 at both ends. In this way, among the multiple cells arranged in sequence along the set direction, two adjacent cells can be arranged by rotating 180° around the Z axis to facilitate electrical connection between the two adjacent cells, for example, the electrode terminal 23 at the left position of the top can be arranged in a relationship of alternating positive and negative terminals in sequence along the set direction, and the electrode terminal 23 at the right position of the top can be arranged in a relationship of alternating negative and positive terminals in sequence along the set direction.
[0052] See also Fig. 9 Optionally, the battery cell is a cylindrical battery cell, and the explosion-proof valve 22 is located at the negative electrode cover plate of the cylindrical battery cell.
[0053] In this embodiment, the battery cell can be a cylindrical battery cell. The cylindrical battery cell is different from the square battery cell and the blade battery cell. The two electrode terminals 23 of the cylindrical battery cell are located at the two axial ends of the battery cell body 21, and the negative electrode cover of the battery cell body 21 is the negative electrode terminal of the cylindrical battery cell. The positive electrode terminal protrudes from the end of the battery cell body 21 away from the negative electrode terminal. In order to allow the explosion-proof valve 22 to have enough installation space, the explosion-proof valve 22 is arranged at the negative electrode cover of the cylindrical battery cell. Since the explosion-proof valve 22 and the positive electrode terminal are at different ends of the battery cell body 21, the separator 13 is arranged in the box body 1, such as Fig. 9 As shown, the box body 11 can be a box structure with only the top end open, and the partition 13 can be a flat plate structure fixed inside the box body 11, and the box cover 12 can be the same as the box cover of a traditional battery pack.
[0054] like Fig.10 As shown, when the battery cell is a cylindrical battery cell, multiple cylindrical battery cells can be evenly arranged in the box body 11, and the negative electrode cover of the battery cell body is abutted against the separator 13 at the bottom of the box body 11.
[0055] See also Figure 5 Optionally, the side walls of the battery cell cavity 14 are respectively provided with a liquid inlet 141 and a liquid outlet 142.
[0056] In this embodiment, the external battery thermal management system can supply coolant into the battery cell cavity 14 through the liquid inlet 141, and the coolant is finally discharged from the liquid outlet 142 to realize the circulation of the coolant, wherein the coolant realizes heat exchange with the battery cell during the process from the liquid inlet 141 to the liquid outlet 142.
[0057] See also Figure 5 Optionally, the liquid inlet 141 is arranged at the first side wall of the battery cell cavity 14, and the liquid outlet 142 is arranged at the second side wall of the battery cell cavity 14, the first side wall and the second side wall are the two side walls of the battery cell cavity 14 that are opposite to each other and the farthest apart, and the projection position of the liquid inlet 141 on the second side wall and the liquid outlet 142 are respectively located at two ends of the second side wall.
[0058] In this embodiment, the liquid inlet 141 is arranged at the first side wall of the battery cell cavity 14, for example, at the left side wall of the battery cell cavity 14, and the liquid outlet 142 is arranged at the second side wall of the battery cell cavity 14, for example, at the right side wall of the battery cell cavity 14; the projection position of the liquid inlet 141 on the second side wall and the liquid outlet 142 are respectively located at the two ends of the second side wall, for example, the liquid inlet 141 is arranged at the front end of the left side wall, and the liquid outlet 142 is arranged at the rear end of the right side wall, so that the coolant has a larger flow range in the battery cell cavity 14, thereby ensuring the cooling effect on the battery cell.
[0059] Another embodiment of the present invention provides a car, comprising the battery pack as described above.
[0060] Since the technical improvements and technical effects of the automobile are the same as those of the battery pack, the automobile will not be described in detail.
[0061] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one of the features.
[0062] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.
Claims
1. A battery pack, characterized in that: The invention comprises a box body (1) and a battery cell, wherein the internal space of the box body (1) is divided into a battery cell chamber (14) and an exhaust chamber (15) by a partition (13), wherein the battery cell comprises a battery cell body (21) and an explosion-proof valve (22) arranged at one end of the battery cell body (21), wherein the battery cell body (21) is located in the battery cell chamber (14), and one end of the battery cell body (21) provided with the explosion-proof valve (22) abuts against the partition (13), and the partition (13) is provided with a through hole (131) corresponding to the explosion-proof valve (22), and the side wall of the exhaust chamber (15) is provided with an exhaust port communicating with the external environment, and the exhaust port and the through hole (131) are arranged in a staggered manner.
2. The battery pack according to claim 1, characterized in that: The plurality of battery cells are sequentially arranged in the battery cell cavity (14) along a set direction, the partition (13) is sequentially provided with a plurality of through openings (131) along the set direction, and the plurality of through openings (131) are arranged in one-to-one correspondence with the explosion-proof valves (22) of the plurality of battery cells.
3. The battery pack according to claim 1, characterized in that: The battery cell is a square battery cell, and the two electrode terminals (23) of the square battery cell are both located at a first set end of the battery cell body (21), and the explosion-proof valve (22) is located at the first set end.
4. The battery pack according to claim 1, characterized in that: The battery cell is a blade battery cell, and the two electrode terminals (23) of the blade battery cell are respectively located at a first set end and a second set end of the battery cell body (21), the first set end and the second set end are the two ends of the battery cell body (21) that are farthest apart, and the two explosion-proof valves (22) are respectively located at the first set end and the second set end.
5. The battery pack according to claim 1, characterized in that: The battery cell is a cylindrical battery cell, and the explosion-proof valve (22) is located at the negative electrode cover plate of the cylindrical battery cell.
6. The battery pack according to any one of claims 3 to 4, characterized in that: The box body (1) comprises a box body (11) having an opening at at least one end and a box cover (12), wherein the box cover (12) is used to cover the opening of the box body (1), and the box cover (12) is arranged opposite to the electrode terminal (23), and when the explosion-proof valve (22) and the electrode terminal (23) are located at the same end of the battery body (21), the separator (13) is arranged on the box cover (12), and when the explosion-proof valve (22) and the electrode terminal (23) are located at different ends of the battery body (21), the separator (13) is arranged in the box body (1).
7. The battery pack according to claim 1, characterized in that: The side walls of the battery cell cavity (14) are respectively provided with a liquid inlet (141) and a liquid outlet (142).
8. The battery pack according to claim 7, characterized in that: The liquid inlet (141) is arranged at a first side wall of the battery cell cavity (14), and the liquid outlet (142) is arranged at a second side wall of the battery cell cavity (14); the first side wall and the second side wall are two side walls of the battery cell cavity (14) that are arranged opposite to each other and are farthest apart, and a projection position of the liquid inlet (141) on the second side wall and the liquid outlet (142) are respectively located at two ends of the second side wall.
9. The battery pack according to claim 1, characterized in that: The exhaust port is arranged on a side wall of the exhaust cavity (15) which is perpendicular to the horizontal direction of the automobile.
10. An automobile, characterized in that: Comprising a battery pack as described in any one of claims 1 to 9.