Battery cover plate assembly and energy storage battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cover plate assembly and an energy storage battery, and the battery cover plate assembly comprises a cover plate, a mounting seat, an explosion-proof cover and a spring; wherein the mounting seat is mounted on the cover plate; a through hole communicated with the inner side and the outer side of the cover plate is formed in the installation base, the explosion-proof cover is installed in the through hole and connected with the installation base through the spring, and when gas thrust borne by the explosion-proof cover is larger than pulling force of the spring on the explosion-proof cover, the explosion-proof cover moves upwards under the action of the thrust till the explosion-proof cover moves out of the through hole, and the explosion-proof cover is installed on the installation base. And gas in the battery shell can be discharged through the through hole. The explosion-proof device is not welded with the through hole of the cover plate any more, so that the operation convenience is improved, the explosion-proof valve is not prone to deformation and damage, the service life of the explosion-proof valve is prolonged, and the cost of the battery is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cover assembly and an energy storage battery. Background Art

[0002] At present, energy storage batteries are a type of equipment that stores electrical energy to solve problems such as unstable and discontinuous power. Energy storage batteries have broad application prospects in the fields of power peak regulation, electric vehicles, household and industrial energy storage, etc. The battery cell of an energy storage battery is the core part of the energy storage battery. At present, the battery cell of an energy storage battery is usually formed by stacking or winding positive and negative electrode sheets. The positive and negative electrode sheets are separated by a diaphragm, and the pole ears are welded on the positive and negative electrode sheets respectively. The battery cell is encapsulated in a battery shell and a battery cover to form an energy storage battery. An explosion-proof device is usually set on the battery cover. When the internal pressure of the battery is too high, the explosion-proof device automatically opens to release the pressure to prevent explosion. In the prior art, the explosion-proof device needs to be fixed in the through hole of the battery cover by welding, which is inconvenient to install and easily causes deformation or even damage of the explosion-proof device, which increases the cost of the battery. Utility Model Content

[0003] The purpose of the present application is to provide a battery cover assembly and an energy storage battery, which to a certain extent solves the technical problem in the prior art that the explosion-proof device needs to be fixed in the through hole of the battery cover by welding, which is inconvenient to install and can easily cause deformation or even damage of the explosion-proof device, thereby increasing the cost of the battery.

[0004] The present application provides a battery cover assembly, comprising: a cover, a mounting seat, an explosion-proof cover and a spring; wherein the mounting seat is mounted on the cover; the mounting seat is formed with a through hole connected to the inner side and the outer side of the cover, the explosion-proof cover is mounted in the through hole, and is connected to the mounting seat through the spring, when the gas thrust applied to the explosion-proof cover is greater than the pulling force of the spring on the explosion-proof cover, the explosion-proof cover moves upward under the action of this thrust until the explosion-proof cover moves out of the through hole, and the gas in the battery shell can be discharged through the through hole.

[0005] In the above technical solution, further, the mounting seat includes a mounting portion and a limiting portion connected to each other, the limiting portion is mounted and abuts against the inner side of the cover plate, the cover plate is formed with a matching through hole, and the mounting portion extends to the outer side of the cover plate through the matching through hole; the limiting portion is formed with an exhaust through hole, the spring is arranged on the limiting portion and is located on the side of the exhaust through hole;

[0006] The mounting portion is formed with a mounting through hole corresponding to the exhaust through hole, the explosion-proof cover is arranged in the mounting through hole, and the spring extends into the mounting through hole and is connected to the explosion-proof cover.

[0007] In any of the above technical solutions, further, the battery cover assembly also includes a dust cover, which is buckled on the mounting portion located on the outside of the cover, and a partial structure of the dust cover passes through the cover and is snap-connected with the limiting portion; the dust cover is formed with a filter hole.

[0008] In any of the above technical solutions, further, the dust cover includes a cap portion, a support portion and a plug-in portion; wherein the support portion is arranged on a side of the cap portion, the plug-in portion is arranged on a side of the support portion close to the limiting portion, and the plug-in portion can pass through the cover plate and be engaged with the limiting portion;

[0009] The mounting seat also includes a connecting portion, which is arranged on a side of the limiting portion close to the cover plate, and is formed with a slot; the plug-in portion is snap-connected in the slot.

[0010] In any of the above technical solutions, further, the mounting seat also includes an auxiliary limiting portion and a reset component; wherein, the auxiliary limiting portion and the reset component are both arranged in the slot, and the auxiliary limiting portion is connected to the side wall of the slot through the reset component; the side wall of the plug-in portion forms a limiting groove, and the auxiliary limiting portion can be clamped in the limiting groove under the action of the reset component.

[0011] In any of the above technical solutions, further, the reset member is an airbag or a spring.

[0012] In any of the above technical solutions, further, the battery cover plate assembly also includes a first sealing ring, and the first sealing ring is compressed between the dust cover and the cover plate.

[0013] In any of the above technical solutions, further, the number of the filtering holes is multiple.

[0014] In any of the above technical solutions, further, the battery cover plate assembly also includes a second sealing ring, and the second sealing ring is compressed between the peripheral structure of the limiting portion located at the mounting portion and the cover plate.

[0015] In any of the above technical solutions, further, the explosion-proof cover is adapted or interference-fitted with the installation through hole.

[0016] In any of the above technical solutions, further, the battery cover assembly also includes a third sealing ring, and the third sealing ring is compressed between the explosion-proof cover and the mounting through hole.

[0017] The present application also provides an energy storage battery, comprising a housing, a battery cell, and a battery cover assembly as described in any of the above technical solutions, wherein the battery cell is arranged in the housing, and the battery cover assembly is sealed on the open end of the housing. Therefore, all the beneficial technical effects of the battery cover assembly are obtained, and no further description is given here.

[0018] In any of the above technical solutions, further, a cooling pad is provided between the battery cell and the shell.

[0019] In any of the above technical solutions, further, the inner cavity of the cooling pad is filled with phase change material.

[0020] Compared with the prior art, the beneficial effects of this application are:

[0021] The explosion-proof device in the present application is no longer welded to the through hole of the cover plate, thereby improving the convenience of operation, and is not prone to deformation and damage of the explosion-proof valve, which helps to increase the service life of the explosion-proof valve and reduce the cost of the battery. In addition, during the pressure relief process, the dust cover can intercept impurities to prevent external impurities from entering the battery during the pressure relief process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 An exploded view of a battery cover assembly provided in an embodiment of the present application;

[0024] Figure 2 An assembly diagram of a mounting base, explosion-proof cover, airbag, and spring provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of a partial structure of a mounting base provided in an embodiment of the present application;

[0026] Figure 4 An assembly diagram of a mounting base and a cover plate provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the structure of the dust cover provided in the embodiment of the present application;

[0028] Figure 6 A partial cross-sectional view of a battery cover assembly provided in an embodiment of the present application;

[0029] Figure 7A schematic diagram of the structure of the energy storage battery provided in the embodiment of the present application;

[0030] Figure 8 A partial cross-sectional view of the energy storage battery provided in an embodiment of the present application.

[0031] Reference numerals:

[0032] 1-cover plate, 2-mounting seat, 21-mounting part, 211-mounting through hole, 22-limiting part, 221-exhaust through hole, 23-connecting part, 231-slot, 24-auxiliary limiting part, 25-airbag, 3-explosion-proof cover, 4-spring, 5-dust cover, 51-cap part, 52-support part, 53-plug-in part, 531-limiting groove, 6-shell, 7-cooling pad, 8-phase change material. DETAILED DESCRIPTION

[0033] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0034] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0035] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Refer to the following Figures 1 to 8 The battery cover assembly and energy storage battery according to some embodiments of the present application are described.

[0039] Embodiment 1

[0040] See also Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, an embodiment of the present application provides a battery cover assembly, comprising: a cover 1, a mounting seat 2, an explosion-proof cover 3 and a spring 4; wherein the mounting seat 2 is mounted on the cover 1; the mounting seat 2 is formed with a through hole connected to the inner and outer sides of the cover 1, the explosion-proof cover 3 is installed in the through hole, and is connected to the mounting seat 2 through the spring 4, when the gas thrust exerted on the explosion-proof cover 3 is greater than the pulling force of the spring 4 on the explosion-proof cover 3, the explosion-proof cover 3 moves upward under the action of this thrust until the explosion-proof cover 3 moves out of the through hole, and the gas in the battery shell can be discharged through the through hole.

[0041] Based on the structure described above, it can be known that in the battery cover assembly provided by the present application, the connection form between the explosion-proof device and the cover 1 is changed. Specifically, the original welding method is no longer used to fix the explosion-proof device in the through hole of the cover 1, but a mounting seat 2 is provided on the cover 1, and a through hole is opened on the mounting seat 2, and a spring 4 and an explosion-proof cover 3 are installed in the through hole, and the explosion-proof cover 3 is connected to the mounting seat 2 through the spring 4, and then only when the gas thrust applied to the explosion-proof cover 3 is greater than the pulling force of the spring 4 on the explosion-proof cover 3, the explosion-proof cover 3 moves up under the action of this thrust until the explosion-proof cover 3 moves out of the through hole, and the gas in the battery shell can be discharged through the through hole.

[0042] It can be seen that the explosion-proof device in the present application is no longer welded to the through hole of the cover plate 1, thereby improving the convenience of operation, and is not prone to deformation and damage of the explosion-proof valve, which helps to increase the service life of the explosion-proof valve and reduce the cost of the battery.

[0043] It should be noted that: the mounting base 2 can be completely installed on the outside of the cover plate 1, and in this case, the cover plate 1 needs to have an exhaust through hole for exhaust, and this exhaust through hole is opposite to the through hole on the mounting base 2; or, the mounting base 2 is completely installed on the inside of the cover plate 1; or, a part of the mounting base 2 is installed on the inside of the cover plate 1, and the other part extends to the outside of the outer plate through the through hole on the cover plate 1, and the specific design is based on actual needs.

[0044] In addition, the inner side of the cover plate 1 refers to the side close to the electrode group, and the outer side of the cover plate 1 refers to the side away from the electrode group.

[0045] In this embodiment, preferably, Figures 2 to 4 , Figure 6 As shown, the mounting seat 2 includes a mounting portion 21 and a limiting portion 22 connected to each other, the limiting portion 22 is mounted and abuts against the inner side of the cover plate 1, the cover plate 1 is formed with a matching through hole, and the mounting portion 21 extends to the outer side of the cover plate 1 through the matching through hole; the limiting portion 22 is formed with an exhaust through hole 221, and the spring 4 is arranged on the limiting portion 22 and is located at the side of the exhaust through hole 221;

[0046] The mounting portion 21 is formed with a mounting through hole 211 corresponding to the exhaust through hole 221, the explosion-proof cover 3 is arranged in the mounting through hole 211, and the spring 4 extends into the mounting through hole 211 and is connected to the explosion-proof cover 3. It can be seen that along the height direction of the cover plate 1, the projection of the exhaust through hole 221 completely falls into the mounting through hole 211, that is, the size of the exhaust through hole 221 is smaller than the mounting through hole 211, so that the outer periphery of the exhaust through hole 221 can be used as an area for installing the spring 4.

[0047] According to the structure described above, the mounting portion 21 serves to mount the spring 4 and the explosion-proof plate; the limiting portion 22 abuts against the inner side of the cover plate 1 to serve as a limit.

[0048] Further, preferably, the mounting portion 21 is a hollow cylinder, and the limiting portion 22 includes a ring and an ear plate arranged on the side of the ring. Of course, the present invention is not limited thereto.

[0049] In this embodiment, preferably, Figure 1 , Figures 5 to 7 As shown, the battery cover assembly also includes a dust cover 5, which is buckled on the mounting portion 21 located on the outside of the cover 1, and a partial structure of the dust cover 5 passes through the cover 1 and is snap-connected with the limiting portion 22; the dust cover 5 is formed with a dust hole.

[0050] According to the structure described above, the dust cover 5 plays a protective role on the explosion-proof plate, and dust-proof holes are formed on the dust cover 5. While preventing dust, it also plays a role in exhaust. Especially during the pressure relief process, the dust cover 5 can intercept impurities to prevent external impurities from entering the battery during the pressure relief process.

[0051] Furthermore, preferably, there are multiple dustproof holes to improve the exhaust effect.

[0052] In this embodiment, preferably, Figure 5 and Figure 6 As shown, the dust cover 5 includes a cap portion 51, a support portion 52 and an inserting portion 53; wherein the support portion 52 is arranged on the side of the cap portion 51, and the inserting portion 53 is arranged on a side of the support portion 52 close to the limiting portion 22, and the inserting portion 53 can pass through the cover plate 1 and be engaged with the limiting portion 22, that is, a through hole needs to be opened on the cover plate 1 for the inserting portion 53 to pass through;

[0053] The mounting base 2 further includes a connecting portion 23 , which is disposed on a side of the limiting portion 22 close to the cover plate 1 , and a slot 231 is formed in the connecting portion 23 ; the plug-in portion 53 is snap-fitted into the slot 231 .

[0054] According to the structure described above, the cap portion 51 is buckled on the exposed end of the mounting portion 21 and mainly plays a protective role; the support portion 52 plays a role in supporting the plug-in portion 53, and the plug-in portion 53 plays a role in connecting the limiting portion 22 on the mounting seat 2.

[0055] Further, preferably, the cap portion 51 , the support portion 52 and the plug-in portion 53 may be an integrated structure, but are not limited thereto and may also be a split structure and assembled together by welding or the like.

[0056] Further, preferably, the cap portion 51 is a circular cover plate, the support portion 52 has an ear plate structure, and the plug-in portion 53 is a square block extending along the height direction of the cover plate 1. Of course, it is not limited thereto.

[0057] In this embodiment, preferably, Figure 5 and Figure 6 As shown, the mounting seat 2 also includes an auxiliary limiting portion 24 and a reset member; wherein, preferably, the reset member is an airbag 25, which will be used as an example in the following text; the auxiliary limiting portion 24 and the reset member are both arranged in the slot 231, and the auxiliary limiting portion 24 is connected to the side wall of the slot 231 through the reset member; the side wall of the plug-in portion 53 forms a limiting groove 531, and the auxiliary limiting portion 24 can be clamped in the limiting groove 531 under the action of the reset member.

[0058] According to the structure described above, it can be known that when the plug-in part 53 is inserted into the slot 231 of the connecting part 23, the bottom of the plug-in part 53 squeezes the limiting part 22, and the limiting part 22 squeezes the inflatable airbag 25. As the plug-in part 53 moves downward, the limiting groove 531 gradually approaches the limiting part 22. When the limiting groove 531 is aligned with the limiting part 22, under the action of the rebound force of the inflatable airbag 25, the limiting part 22 is reset, and the limiting part 22 can be inserted into the limiting groove 531, thereby realizing the connection between the plug-in part 53 and the connecting part 23, and then realizing the quick connection between the dust cover 5 and the mounting seat 2, thereby improving the convenience and efficiency of the installation of the explosion-proof structure.

[0059] Further, preferably, the airbag 25 can be bonded to the limiting portion 22 , but this is not limited thereto.

[0060] Further, preferably, the inner wall of the slot 231 is provided with an airbag 25 slot 231, a part of the airbag 25 is clamped in the airbag 25 slot 231, or the airbag 25 is directly bonded and fixed on the inner wall of the slot 231, or bonded and fixed in the airbag 25 slot 231, etc. Of course, it is not limited to this.

[0061] It should be noted that the structure of the reset member is not limited to the inflatable airbag 25, and can also be a spring 4 or a rubber member, etc., and is specifically designed according to needs.

[0062] Further, preferably, the number of the supporting parts 52 and the plug-in parts 53 are both two, and they correspond one to one, as two groups of structures, which are respectively arranged on the opposite sides of the cap part 51. Correspondingly, the number of the connecting parts 23 can also be two, which are respectively arranged on the opposite sides of the mounting part 21, and correspond one to one with the two plug-in parts 53 mentioned above, that is, two groups of snap-fit ​​structures are formed. It can be seen that such a paired snap-fit ​​structure design makes the dust cover 5 and the mounting seat 2 more firmly and stably assembled. Of course, it is not limited to this, and the number of snap-fit ​​structures can also be one group or more than two groups, such as three groups, four groups, etc.

[0063] Furthermore, preferably, a slot 231 is provided on both sides of each plug-in portion 53, and each slot 231 is provided with an auxiliary limiting portion 24 and a reset member, which helps to improve the stability and firmness of the snap connection.

[0064] In this embodiment, preferably, the battery cover plate assembly further includes a first sealing ring (not shown in the figure), and the first sealing ring is compressed between the dust cover 5 and the cover plate 1.

[0065] According to the structure described above, a sealing ring is designed between the dust cover 5 and the cover plate 1 to further play a sealing role.

[0066] Further, preferably, a first sealing ring is provided on the peripheral structure of the aforementioned plug-in portion 53 and between the cover cap and the cover plate 1 .

[0067] In this embodiment, preferably, the battery cover assembly further includes a second sealing ring (not shown in the figure), and the second sealing ring is compressed between the peripheral structure of the limiting portion 22 located at the mounting portion 21 and the cover 1.

[0068] According to the structure described above, it can be known that a sealing ring is designed between the peripheral structure of the limiting portion 22 located at the mounting portion 21 and the cover plate 1 to further play a sealing role.

[0069] Further, preferably, a second sealing ring is disposed between the peripheral structure of the aforementioned connecting portion 23 and the peripheral structure of the mounting portion 21 and the cover plate 1 .

[0070] In this embodiment, preferably, Figure 2 As shown, the explosion-proof cover 3 is adapted or interference-fitted with the installation through hole 211 , and is specifically designed according to actual needs.

[0071] In this embodiment, preferably, the battery cover assembly also includes a third sealing ring (not shown in the figure), which is compressed between the explosion-proof cover 3 and the mounting hole 211 to further seal the battery. Preferably, the inner wall of the mounting hole 211 is provided with a groove, and the third sealing ring is installed in the groove.

[0072] Embodiment 2

[0073] See also Figure 7 and Figure 8 As shown, the second embodiment of the present application further provides an energy storage battery, comprising a housing 6, a battery cell and the battery cover assembly described in the first embodiment, wherein the battery cell is arranged in the housing 6, and the battery cover assembly is sealed at the open end of the housing 6. Therefore, it has all the beneficial technical effects of the battery cover assembly, and the same technical features and beneficial effects are not repeated.

[0074] It should be noted that: an opening is formed at one end of the shell 6 along its height direction, and only one end is equipped with a battery cover assembly, or openings are formed at both ends of the shell 6 along its height direction, and both openings are equipped with the battery cover assembly, and the specific design is based on actual needs.

[0075] In this embodiment, preferably, Figure 8 As shown, a cooling pad 7 is provided between the battery cell and the housing 6 .

[0076] According to the structure described above, during the use of the energy storage battery, the cooling pad 7 can absorb the heat around the energy storage cell, reduce the rate of temperature rise around the cell, ensure the normal operation of the cell, and help extend the service life of the cell.

[0077] Furthermore, preferably, the cooling pad 7 is filled with phase change material 8. During the heat release process of the energy storage battery, the phase change material 8 can absorb heat and reduce the heating rate of the energy storage battery. The phase change material 8 is selected according to demand and is not limited here. The outer layer material of the cooling pad 7 can be aluminum alloy.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cover assembly, characterized in that: include: A cover plate, a mounting seat, an explosion-proof cover and a spring; wherein the mounting seat is mounted on the cover plate; the mounting seat is formed with a through hole connected to the inner side and the outer side of the cover plate, the explosion-proof cover is mounted in the through hole, and is connected to the mounting seat through the spring, when the gas thrust applied to the explosion-proof cover is greater than the pulling force of the spring on the explosion-proof cover, the explosion-proof cover moves up under the action of this thrust until the explosion-proof cover moves out of the through hole, and the gas in the battery shell can be discharged through the through hole.

2. The battery cover assembly according to claim 1, characterized in that: The mounting seat comprises a mounting portion and a limiting portion connected to each other, the limiting portion is mounted and abuts against the inner side of the cover plate, the cover plate is formed with a matching through hole, and the mounting portion extends to the outer side of the cover plate through the matching through hole; the limiting portion is formed with an exhaust through hole, the spring is arranged on the limiting portion and is located at the side of the exhaust through hole; The mounting portion is formed with a mounting through hole corresponding to the exhaust through hole, the explosion-proof cover is arranged in the mounting through hole, and the spring extends into the mounting through hole and is connected to the explosion-proof cover.

3. The battery cover assembly according to claim 2, characterized in that: The battery cover assembly also includes a dust cover, which is buckled on the mounting portion located on the outer side of the cover, and a partial structure of the dust cover passes through the cover and is snap-connected with the limiting portion; the dust cover is formed with a filter hole.

4. The battery cover assembly according to claim 3, characterized in that: The dust cover comprises a cap portion, a support portion and an inserting portion; wherein the support portion is arranged on a side of the cap portion, the inserting portion is arranged on a side of the support portion close to the limiting portion, and the inserting portion can pass through the cover plate and be engaged with the limiting portion; The mounting seat also includes a connecting portion, which is arranged on a side of the limiting portion close to the cover plate, and a slot is formed on the connecting portion; the plug-in portion is clamped in the slot.

5. The battery cover assembly according to claim 4, characterized in that: The mounting seat also includes an auxiliary limiting portion and a reset component; wherein the auxiliary limiting portion and the reset component are both arranged in the slot, and the auxiliary limiting portion is connected to the side wall of the slot through the reset component; the side wall of the plug-in portion forms a limiting groove, and the auxiliary limiting portion can be clamped in the limiting groove under the action of the reset component.

6. The battery cover assembly according to claim 5, characterized in that: The reset member is an air bag or a spring.

7. The battery cover assembly according to claim 3, characterized in that: The battery cover assembly further includes a first sealing ring, wherein the first sealing ring is compressed between the dust cover and the cover; and / or The number of the filtering holes is multiple.

8. The battery cover assembly according to claim 2, characterized in that: The battery cover plate assembly further includes a second sealing ring, which is compressed between the outer peripheral structure of the limiting portion located at the mounting portion and the cover plate.

9. The battery cover assembly according to any one of claims 2 to 8, characterized in that: The explosion-proof cover is adapted or interference-fitted with the mounting through hole; and / or The battery cover assembly also includes a third sealing ring, which is compressed between the explosion-proof cover and the mounting through hole.

10. An energy storage battery, characterized in that: It comprises a shell, a battery cell and a battery cover assembly as claimed in any one of claims 1 to 9; wherein the battery cell is arranged in the shell, and the battery cover assembly is sealed on the open end of the shell.

11. The energy storage battery according to claim 10, characterized in that: A cooling pad is arranged between the battery core and the shell.

12. The energy storage battery according to claim 11, characterized in that: The inner cavity of the cooling pad is filled with phase change material.

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