Battery system and vehicle

Abstract

The invention discloses a battery system and a vehicle. The battery system comprises a battery shell; a plurality of battery cells and a protection structure are arranged in the battery shell; each battery cell comprises an exhaust valve, and each exhaust valve is positioned on the same side of each battery cell; the protection structure comprises at least one air outlet, a plurality of air inlets and cavities located between the air inlets and the air outlets, and the air inlets correspond to the exhaust valves. And the protection structure is used for releasing gas generated by each battery cell. According to the technical scheme, electric appliance elements or circuits and the like in the battery shell can be protected, and the working reliability of a battery system is improved.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery system and a vehicle. Background Art

[0002] The battery pack is a core component of electric vehicles, energy storage systems, etc. The battery pack contains multiple battery cells. As the battery ages or works in a harsh environment, the battery cells may be damaged, leading to abnormal conditions such as electrolyte leakage and thermal runaway. This will not only damage other battery cells that have not shown abnormalities, but may also have a negative impact on the safety and performance of the battery pack.

[0003] The existing technology usually installs an explosion-proof valve on the battery pack to relieve the pressure and exhaust the battery pack, but the high-temperature and high-pressure gas generated by each battery cell in the existing battery pack will fill various areas inside the battery pack and will then be discharged through the explosion-proof valve set on the battery pack. The high-temperature and high-pressure gas located in various areas of the battery pack may cause unnecessary damage to the electrical components inside the battery pack, thereby affecting the overall working stability and service life of the battery pack. Summary of the invention

[0004] The present invention provides a battery system and a vehicle, which can protect electrical components or circuits inside a battery housing and improve the working reliability of the battery system.

[0005] In a first aspect, the present invention provides a battery system, comprising: a battery housing;

[0006] The interior of the battery housing includes a plurality of battery cells and a protective structure;

[0007] The battery cell comprises an exhaust valve, and each of the exhaust valves is located on the same side of each of the battery cells;

[0008] The protection structure includes at least one air outlet, multiple air inlets, and a cavity between each of the air inlets and the air outlets, and each of the air inlets is arranged corresponding to each of the exhaust valves; the protection structure is used to release the gas generated by each of the battery cells.

[0009] Optionally, the protection structure further includes an explosion-proof valve, and the explosion-proof valve includes the air outlet.

[0010] Optionally, the explosion-proof valve comprises:

[0011] A sealing cover, located on the outside of the battery housing; the sealing cover is used to seal the gas outlet;

[0012] A push rod is fixedly connected to the sealing cover; the battery housing further comprises fixing holes arranged one by one corresponding to each of the gas outlets; the push rod passes through the fixing holes;

[0013] An elastic member, sleeved on the top rod; one end of the elastic member abuts against the battery housing surrounding the fixing hole;

[0014] A limit assembly is abutted against at least the other end of the elastic member and fixedly connected to the push rod; the limit assembly is used to limit the displacement of the elastic member in a first direction; the first direction is parallel to the extension direction of the push rod.

[0015] Optionally, the sealing cover includes a groove and a sealing rubber ring located in the groove.

[0016] Optionally, the air outlet includes at least one air outlet sub-port, and each of the air outlet sub-ports is arranged around the fixing hole.

[0017] Optionally, the limiting assembly includes a first base, a second base and a fixing member;

[0018] The first base comprises a first through hole and a first boss surrounding the first through hole;

[0019] The second base comprises a second through hole and a second boss surrounding the second through hole;

[0020] The elastic member is sleeved on the first boss and the second boss, and the push rod passes through the first through hole and the second through hole; a side surface of the first base facing away from the first boss abuts against the battery housing;

[0021] The fixing member is fixedly connected to the push rod and abuts against the second base.

[0022] Optionally, a side of the ejector pin facing away from the sealing cover includes a positioning groove, and the fixing member at least partially surrounds the positioning groove.

[0023] Optionally, the protection structure includes: a first plate, a second plate and a portion of the battery housing;

[0024] The first plate includes a plurality of air inlets; the plane where the first plate is located is parallel to the plane where the second plate is located, and the first plate and the second plate are arranged along a second direction; the second direction intersects with the direction of the plane where each exhaust valve is located; the first plate and the second plate are fixedly connected to the battery housing respectively.

[0025] Optionally, the battery housing is reused as the second plate.

[0026] In a second aspect, the present invention provides a vehicle comprising the battery system of the first aspect.

[0027] The technical solution provided by the present invention is to set a protective structure inside the battery shell, and set the air inlet of the protective structure corresponding to the exhaust valve of the battery cell, so that the gas generated by each battery cell can be released into the cavity of the protective structure through the exhaust valve in time, and then released to the outside through the exhaust port, thereby preventing the gas from floating to various areas in the battery shell and then damaging the electrical components of the battery system, so as to protect the electrical components or circuits inside the battery shell and improve the working reliability of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a battery system provided by an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of a top view of a protective structure provided by an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of another battery system provided by an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the disassembled structure of an explosion-proof valve provided in an embodiment of the present invention;

[0032] Figure 5 A schematic structural diagram of an assembled explosion-proof valve provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] Figure 1 A schematic diagram of the structure of a battery system provided by an embodiment of the present invention, Figure 2 A schematic diagram of a top view of a protective structure provided by an embodiment of the present invention, referring to Figure 1 and Figure 2 The battery system includes a battery housing 100. The battery housing 100 includes a plurality of battery cells 10 and a protective structure 20. The battery cells 10 include exhaust valves 11, each of which is located on the same side of each battery cell 10; the protective structure 20 includes at least one gas outlet 21, a plurality of gas inlets 22, and a cavity 23 between each gas inlet 22 and the gas outlet 21, each gas inlet 22 is arranged corresponding to each exhaust valve 11. The protective structure 20 is used to release the gas generated by each battery cell 10.

[0035] The battery cell 10 is used to store or release electric energy. The exhaust valve 11 includes a welding explosion-proof valve or a laser welding explosion-proof valve, etc., which is used to release the gas generated when the battery cell 10 is working and reduce the internal pressure of the battery cell 10.

[0036] Specifically, the battery cell 10 includes a positive electrode, a negative electrode, and an electrolyte. When the battery cell 10 is in a discharging state or a charging state, the electrolyte inside the battery cell 10 undergoes an electrochemical reaction to generate gas. The gas will cause the battery cell 10 to expand, and in severe cases, it will explode. In order to solve this problem, an exhaust valve 11 is usually provided on the body of the battery cell 10, so that when the gas pressure generated by the battery cell 10 reaches the release pressure of the exhaust valve 11, the exhaust valve 11 will automatically open or directly rupture to release the high-pressure gas inside the battery cell 10 to prevent the battery cell 10 from bursting. On this basis, by setting the protective structure 20, the air inlet 22 of the protective structure 20 is set corresponding to the exhaust valve 11, so that when the exhaust valve 11 is exhausting, the gas discharged by the exhaust valve 11 can enter the cavity 23 in time through the air inlet 22, and the protective structure 20 can limit the gas generated by each battery cell 10 in the cavity 23, preventing the gas from floating to various areas in the battery shell 100, thereby damaging the electrical components in the battery shell 100, so as to protect the electrical components or circuits inside the battery shell 100, etc., and improve the working reliability of the battery system. In addition, by setting the protective structure 100 to include at least one air outlet 21, when the gas pressure discharged from each battery cell 10 into the cavity 23 is greater than the external pressure, the gas in the cavity 23 can be discharged in time through the air outlet 21, preventing the gas from being retained in the cavity 23, causing the cavity 23 to deform, and then causing the battery cell 10 or the battery shell 100 to deform and other problems, thereby improving the structural stability and working stability of the battery system.

[0037] It should be noted that the specific manner in which each air inlet 22 and each exhaust valve 11 are arranged correspondingly can be arranged according to actual needs. In an optional embodiment, when the exhaust valve 11 is a bursting structure, that is, when the gas pressure in the battery cell 10 reaches the bursting pressure of the exhaust valve 11, the exhaust valve 11 bursts, and the bursting port of the exhaust valve 11 is located in the air inlet 22. Therefore, after the exhaust valve 11 bursts, the gas generated by the battery cell 10 can be released into the cavity 23 through the air inlet 22. When the exhaust valve 11 is an open valve structure, that is, when the gas pressure in the battery cell 10 reaches the opening pressure of the exhaust valve 11, the exhaust valve 11 opens, and the exhaust port of the exhaust valve 11 is located in the air inlet 22. Therefore, the gas discharged from the exhaust valve 11 can be released into the cavity 23 through the air inlet 22. On the premise that the gas released through the exhaust valve 11 can enter the cavity 23 through the air inlet 22, the specific manner in which each air inlet 22 and each exhaust valve 11 are arranged correspondingly can also be other, which is not specifically limited here.

[0038] It can be understood that the number of the air outlets 21 can be set according to the number of battery cells 10, the maximum release pressure of the battery cells 10, the size of the air outlet 21 and other parameters. On the basis of ensuring that the pressure in the cavity 23 and the pressure of the external environment are kept at a small difference, the number of the air outlets 21 can be set according to actual needs, and no specific limitation is made here.

[0039] The technical solution of the present invention is to set a protective structure inside the battery shell, and set the air inlet of the protective structure corresponding to the exhaust valve of the battery cell, so that the gas generated by each battery cell can be released into the cavity of the protective structure through the exhaust valve in time, and then released to the outside through the exhaust port, thereby preventing the gas from floating to various areas in the battery shell and then damaging the electrical components of the battery system, so as to protect the electrical components or circuits inside the battery shell and improve the working reliability of the battery system.

[0040] Optional, Figure 3 A schematic diagram of the structure of another battery system provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the protection structure 20 further includes an explosion-proof valve 30 , and the explosion-proof valve 30 includes a gas outlet 21 .

[0041] Specifically, by providing the explosion-proof valve 30 including the gas outlet 21, so that the gas outlet 21 is used as the exhaust port of the explosion-proof valve 30, there is no need to additionally provide an exhaust port for the explosion-proof valve 30, so as to simplify the structure of the explosion-proof valve 30. When the explosion-proof valve 30 is in an unexhausted state, the explosion-proof valve 30 is in a sealed state, at which time the cavity 23 is isolated from the outside world, and impurities in the external environment are prevented from entering the cavity 23, so as to ensure the reliability of gas flow in the cavity 23, prevent impurities or foreign matter from blocking the gas outlet 21, and improve the working reliability of the battery system.

[0042] Optional, Figure 4 A schematic diagram of the disassembled structure of an explosion-proof valve provided in an embodiment of the present invention is shown in FIG. Figure 4 As shown, the explosion-proof valve 30 includes a sealing cover 31, a push rod 32, an elastic member 33 and a limit assembly 34. The sealing cover 31 is located on the outside of the battery housing 100, and the sealing cover 31 is used to seal the gas outlet 21. The push rod 32 is fixedly connected to the sealing cover 31; the battery housing 100 also includes fixing holes 101 arranged one by one corresponding to each gas outlet 21; the push rod 32 passes through the fixing holes 101. The elastic member 33 is sleeved on the push rod 32; one end of the elastic member 33 abuts against the battery housing 100 surrounding the fixing hole 101. The limit assembly 34 abuts against at least the other end of the elastic member 33 and is fixedly connected to the push rod 32; the limit assembly 34 is used to limit the displacement of the elastic member 33 in the first direction X. Among them, the first direction X is parallel to the extension direction of the push rod 32.

[0043] The sealing cover 31 is made of metal or plastic. One end of the push rod 32 is fixedly connected to the sealing cover 31. A threaded hole can be provided on the sealing cover 31, and one end of the push rod 32 is provided with a thread. The push rod 32 and the sealing cover 32 are screwed together through the thread, thereby fixing the push rod 32 and the sealing cover 31. Alternatively, the push rod 32 and the sealing cover 31 can be made integrally to improve the fixing reliability. The elastic member 33 includes a device that can generate elastic deformation, such as a spring.

[0044] Specifically, the sealing cover 31 is located on the outside of the battery housing 100, so as to seal the air outlet 21 when the explosion-proof valve is in an unvented state, to prevent foreign matter or impurities from entering the cavity 23 through the air inlet 21, to protect the cavity 23, so that the cavity 23 only includes gas, and the exhaust efficiency is improved. One end of the push rod 32 is fixedly connected to the sealing cover 31, and after the push rod 32 passes through the fixing hole 101, the elastic member 33 is sleeved on the push rod 32, and one end of the elastic member 33 abuts against the battery housing 100 surrounding the fixing hole 101, that is, the battery housing 100 is also a part of the limit assembly 34, which is used to limit the displacement of the elastic member 33, to prevent the elastic member 33 from directly popping out of the battery housing 100, causing the explosion-proof valve to move out or be damaged. Since one end of the elastic member 33 is already abutted against the battery housing 100, the other end of the elastic member 33 is set to abut against the limit assembly 34, and the limit assembly 34 at the other end of the elastic member 33 is fixedly connected to the push rod 32, so that when the gas pressure in the cavity drives the limit assembly 34 and the push rod 32 to move in the direction of the cavity toward the outside of the battery housing, the limit assembly 34 abuts against the elastic member 33 to drive the elastic member 33 to produce compression deformation, and at this time there is a gap between the sealing cover 31 and the battery housing 31, and the gas in the cavity can be discharged to the outside through the gas outlet 21 and the gap. When the gas pressure in the cavity is slightly different from or consistent with the gas pressure in the outside, the elastic member 33 rebounds and resets, driving the limit assembly 34 and the push rod 32 to move along the battery housing 100 toward the cavity, the explosion-proof valve 30 is reset, the sealing cover 31 abuts against the battery housing 100, and the gas outlet 21 is sealed by the sealing cover 31. In this way, the explosion-proof valve is manufactured integrally with the battery housing to simplify the structure of the explosion-proof valve, while improving the fixing reliability and use stability of the explosion-proof valve and the battery housing.

[0045] It should be noted that the positional relationship between the fixing hole 101 and the air outlet 21 can be set according to parameters such as the design shape of the air outlet 21. For example, when the air outlet 21 is a circular ring, the fixing hole 101 can be located at the center of the circular ring. Alternatively, if the air outlet 21 is circular, the fixing hole 101 can be located at a position with a preset distance from the circular edge. Other options are also possible and are not specifically limited here. In an optional embodiment, continue to refer to Figure 4 The air outlet 21 includes at least one air outlet sub-port 210 , and each air outlet sub-port 210 is arranged around the fixing hole 101 .

[0046] The shape of the gas outlet 210 includes a circle, a sector, a rectangle or a triangle, etc., and can be set according to actual needs. On the premise that the gas outlet 21 includes at least one gas outlet 210, so that the gas in the cavity can be discharged from the gas outlet 210, the number of the gas outlet 210 can be set according to actual needs. Figure 4 It is only shown that the air outlet 21 includes four air outlet sub-ports 210, namely the first air outlet sub-port 211, the second air outlet sub-port 212, the third air outlet sub-port 213 and the fourth air outlet sub-port 214, and the air outlet sub-ports 210 are all fan-shaped, and can also be other shapes, which are not specifically limited here.

[0047] Specifically, each air outlet sub-port 210 is arranged to surround the fixing hole 101, so that the overall area of ​​the sealing cover 31 is reduced on the basis that the sealing cover 31 covers the air outlet 21. The specific principle is as follows: since one end of the push rod 32 is fixedly connected to the sealing cover 31, and the push rod 32 passes through the fixing hole 101, the sealing cover 31 includes a portion covering the fixing hole 101. If the fixing hole 101 is arranged at a position where the air outlet sub-port 210 is away from the center of the air outlet 21, the sealing cover 31 needs to include a portion covering the fixing hole 101 in addition to the portion covering the air outlet 21, which will cause the sealing cover 31 to have a larger size. By arranging the fixing hole 101 in the middle area of ​​each air outlet sub-port 210, so that the sealing cover 31 covers the fixing hole 101 while covering each air outlet sub-port 210, the sealing cover 31 has a smaller size, thereby improving the utilization rate of the sealing material.

[0048] It is understandable that, under the premise that the limit assembly 34 can limit the displacement of the elastic member 33, the structure of the limit assembly 34 can be set according to actual needs. The following is an exemplary description of the limit assembly 34 in the embodiment of the present invention using a typical example. Figure 5 The schematic diagram of the structure of the explosion-proof valve after assembly provided by the embodiment of the present invention is shown in FIG. Figure 4 and Figure 5 The limiting assembly 34 includes a first base 341, a second base 342 and a fixing member 343. The first base 341 includes a first through hole 3411 and a first boss 3412 surrounding the first through hole 3411. The second base 342 includes a second through hole 3421 and a second boss 3422 surrounding the second through hole 3421. The elastic member 33 is sleeved on the first boss 3412 and the second boss 3422, and the top rod 32 passes through the first through hole 3411 and the second through hole 3421. A side surface of the first base 341 that is away from the first boss 3412 abuts against the battery housing 100. The fixing member 343 is fixedly connected to the top rod 32 and abuts against the second base 342.

[0049] The first base 341 , the second base 342 and the fixing member 343 include materials such as iron and aluminum, and can be configured according to actual needs, which are not specifically limited here.

[0050] Specifically, by providing a first base 341 and a second base 342 with bosses, after the elastic member 33 is sleeved on the first boss 3412 and the second boss 3422, and the fixing member 343 is fixedly connected to the ejector rod 32 and abuts against the second base 342, when the gas pressure in the cavity drives the ejector rod 32 to move along the cavity 23 toward the battery case 100, the fixing member 343 fixedly connected to the ejector rod 32 can drive the second base 342 to move toward the battery case 100. Since the elastic member 33 is sleeved on the first boss 341 and the second boss 342, the second base 342 will drive the elastic member 33 to move toward the battery case 100, and the elastic member 33 is compressed between the first base 341 and the second base 342; conversely, the elastic member 33 rebounds and resets between the first base 341 and the second base 342. In this way, by providing the first boss 341 in the first base 341 and the second boss 342 in the second base 342, the elastic member 33 is confined between the first base 341 and the second base 342, so as to prevent the elastic member 33 from moving along the third direction and thus wearing the elastic member 33, thereby improving the reliability and service life of the elastic member 33. The third direction intersects with the extension direction of the ejector pin 32.

[0051] It should be noted that the specific method of fixing the fixing member 343 and the push rod 32 can be set according to actual needs. For example, the side of the push rod 32 away from the sealing cover 31 includes a thread, and the fixing member 343 is a circular ring structure, and the interior of the circular ring also includes an internal thread. The fixing member 343 is rotated and tightened with the side of the push rod 32 away from the sealing cover 31 through the internal thread, thereby fixing the fixing member 343 and the push rod 32. In an optional embodiment, the side of the push rod 32 away from the sealing cover 31 includes a positioning groove 310, and the fixing member 343 at least partially surrounds the positioning groove 310.

[0052] The fixing member 343 includes materials such as washers and can be configured according to actual needs, which are not specifically limited here.

[0053] Specifically, the top rod 32 includes a diameter of the top rod, and the diameter of the positioning groove 310 is the groove diameter, and the groove diameter is smaller than the top rod diameter, so that after the fixing member 343 is engaged with the positioning groove 310, the position of the fixing member 343 on the top rod 32 is fixed, and the fixing member 343 is prevented from moving, which may cause the top rod 32 to fail to move correctly, thereby improving the reliability of the position movement of the top rod 32. The fixing member 343 can be a circular ring structure, the inner ring of the circular ring structure is engaged with the positioning groove 310, and the part between the inner ring and the outer ring is in contact with the second base 342. Alternatively, the fixing member 343 includes a circular ring opening structure, that is, the circular ring opening structure includes an opening area, and the circular ring opening structure can be engaged with the positioning groove 310 through the opening area, thereby improving the ease of assembly.

[0054] Optional, continue to refer to Figure 4 The sealing cover 31 includes a groove 301 and a sealing rubber ring 311 located in the groove 301 .

[0055] The sealing rubber ring 311 includes materials such as rubber and can be configured according to actual needs, which is not specifically limited here.

[0056] Specifically, a groove 301 is provided in the sealing cover 31 and a sealing rubber ring 311 is placed in the groove 301 to improve the airtightness of the sealing cover 31, thereby preventing hot gases in the external environment from entering the cavity 23 and further affecting the operation of the battery cell 10, thereby improving the working stability of the battery cell 10.

[0057] Optional, continue to refer to Figure 1 The protective structure 20 includes a first plate 201, a second plate 202 and a portion of the battery housing 100. The first plate 201 includes a plurality of air inlets 22. The plane where the first plate 201 is located is parallel to the plane where the second plate 202 is located, and the first plate 201 and the second plate 202 are arranged along a second direction Z. The second direction Z intersects with the direction of the plane where each exhaust valve 11 is located. The first plate 201 and the second plate 202 are fixedly connected to the battery housing 100 respectively.

[0058] The materials of the first plate 201 and the second plate 202 include steel, aluminum and other materials, which can be set according to actual needs and are not specifically limited here.

[0059] Specifically, by setting the first plate 201 and the second plate 202 to be parallel, there is a preset spacing between the first plate 201 and the second plate 202, and the space between the first plate 201 and the second plate 202 constitutes a cavity 23. The fixed connection method of the first plate 201 and the second plate 202 and the battery housing 100 can be set according to actual needs. For example, the first plate 201 and the second plate 202 can be provided respectively, and the first plate 201 and the battery housing 100 are fixedly connected by welding, and the second plate 202 and the battery housing 100 are fixedly connected by welding. Alternatively, the first plate 201, the second plate 202 and the battery housing 100 are prepared as a whole to improve the connection reliability.

[0060] In an alternative embodiment, reference Figure 3 , the battery housing 100 is reused as the second plate 202. In this way, the number of plates in the protection structure 20 can be reduced, and the utilization rate of the battery housing 100 can be improved.

[0061] Based on the same inventive concept, the present invention also provides a car, which includes a battery system provided by any embodiment of the present invention. Therefore, the car has the technical features of the battery system provided by the embodiment of the present invention and can achieve the beneficial effects of the battery system provided by the embodiment of the present invention. The similarities can be referred to the above description of the battery system provided by the embodiment of the present invention, which will not be repeated here.

[0062] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery system, characterized in that: include: Battery housing; The interior of the battery housing includes a plurality of battery cells and a protective structure; The battery cell comprises an exhaust valve, and each of the exhaust valves is located on the same side of each of the battery cells; The protection structure includes at least one air outlet, multiple air inlets, and a cavity between each of the air inlets and the air outlets, and each of the air inlets is arranged corresponding to each of the exhaust valves; the protection structure is used to release the gas generated by each of the battery cells.

2. The battery system according to claim 1, characterized in that: The protection structure further includes an explosion-proof valve, and the explosion-proof valve includes the gas outlet.

3. The battery system according to claim 2, characterized in that: The explosion-proof valve comprises: A sealing cover, located on the outside of the battery housing; the sealing cover is used to seal the gas outlet; A push rod is fixedly connected to the sealing cover; the battery housing further comprises fixing holes arranged one by one corresponding to each of the gas outlets; the push rod passes through the fixing holes; An elastic member, sleeved on the top rod; one end of the elastic member abuts against the battery housing surrounding the fixing hole; A limit assembly is in contact with at least the other end of the elastic member and is fixedly connected to the push rod; the limit assembly is used to limit the displacement of the elastic member in a first direction; the first direction is parallel to the extension direction of the push rod.

4. The battery system according to claim 3, characterized in that: The sealing cover comprises a groove and a sealing rubber ring located in the groove.

5. The battery system according to claim 3, characterized in that: The air outlet includes at least one air outlet sub-port, and each of the air outlet sub-ports is arranged around the fixing hole.

6. The battery system according to claim 3, characterized in that: The limiting assembly includes a first base, a second base and a fixing member; The first base comprises a first through hole and a first boss surrounding the first through hole; The second base comprises a second through hole and a second boss surrounding the second through hole; The elastic member is sleeved on the first boss and the second boss, and the push rod passes through the first through hole and the second through hole; a side surface of the first base facing away from the first boss abuts against the battery housing; The fixing member is fixedly connected to the push rod and abuts against the second base.

7. The battery system according to claim 3, characterized in that: The side of the ejector pin facing away from the sealing cover comprises a positioning groove, and the fixing member at least partially surrounds the positioning groove.

8. The battery system according to claim 1, characterized in that: The protection structure includes: a first plate, a second plate and a portion of the battery housing; The first plate includes a plurality of air inlets; the plane where the first plate is located is parallel to the plane where the second plate is located, and the first plate and the second plate are arranged along a second direction; the second direction intersects with the direction of the plane where each exhaust valve is located; the first plate and the second plate are fixedly connected to the battery housing respectively.

9. The battery system according to claim 8, characterized in that: The battery housing is reused as the second plate.

10. An automobile, characterized in that: A battery system comprising any one of claims 1 to 9.

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