CN218887444U - Battery and battery pack - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery and group battery, and the battery includes: the battery comprises a battery shell, a first mounting part and a second mounting part, wherein the battery shell is provided with a through hole, and the first mounting part and the second mounting part are arranged on the battery shell along the axial direction of the through hole; and the explosion-proof valve is arranged on at least one of the first installation part and the second installation part so as to seal the through hole. Because be provided with first installation department and second installation department on the battery case to can be so that install explosion-proof valve on first installation department and the second installation department selectively, provide two at least mounted position for explosion-proof valve's installation promptly, carry out explosion-proof valve's setting according to actual need with this, thereby make things convenient for explosion-proof valve's installation, with this installation effectiveness who improves explosion-proof valve, thereby improve the assembling property of battery.

Description

Battery and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery and group battery.

Background

In the correlation technique, when the battery thermal runaway, the explosion-proof valve of battery explodes to this realization avoids causing battery safety problem to the inside quick pressure release of battery, because the mounted position restriction of explosion-proof valve, the inconvenient problem of installation may appear.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery and group battery to improve the performance of battery.

According to an aspect of the present invention, there is provided a battery, including:

the battery comprises a battery shell, a first mounting part and a second mounting part, wherein the battery shell is provided with a through hole, and the first mounting part and the second mounting part are arranged on the battery shell along the axial direction of the through hole;

and the explosion-proof valve is arranged on at least one of the first installation part and the second installation part so as to seal the through hole.

The utility model discloses the battery includes battery housing and explosion-proof valve, and the explosion-proof valve setting is on battery housing's through-hole to when battery housing internal pressure reached a take the altitude, explosion-proof valve can in time explode, realizes quick pressure release with this, thereby guarantees the safety in service performance of battery. Because be provided with first installation department and second installation department on the battery case to can be so that install explosion-proof valve on first installation department and the second installation department selectively, provide two at least mounted positions for explosion-proof valve's installation promptly, with this setting of explosion-proof valve according to actual need carries out, thereby make things convenient for explosion-proof valve's installation, with this installation effectiveness who improves explosion-proof valve, thereby improve the assembling performance of battery.

According to another aspect of the present invention, there is provided a battery pack including the above battery.

The utility model discloses group battery includes the battery, and the battery includes battery housing and explosion-proof valve, and explosion-proof valve setting is on battery housing's through-hole to when battery housing internal pressure reached a take the altitude, explosion-proof valve can in time explode out, with this realization quick pressure release, thereby guarantees the safety in utilization performance of battery. Because be provided with first installation department and second installation department on the battery case to can be so that install explosion-proof valve on first installation department and the second installation department selectively, provide two at least mounted positions for explosion-proof valve's installation promptly, with this setting of explosion-proof valve according to actual need carries out, thereby make things convenient for explosion-proof valve's installation, with this installation effectiveness who improves explosion-proof valve, thereby improve the assembly performance of group battery.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views.

Wherein:

fig. 1 is a schematic view showing a partial structure of a battery according to a first exemplary embodiment;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

fig. 3 is a schematic view showing a partial structure of a battery according to a second exemplary embodiment;

FIG. 4 is a schematic cross-sectional view of FIG. 3;

fig. 5 is a schematic view showing a partial cross-sectional structure of a battery according to a third exemplary embodiment;

fig. 6 is a schematic view showing a partial cross-sectional structure of a battery according to a fourth exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a through hole; 12. a first mounting portion; 13. a second mounting portion; 14. an outer surface; 15. an inner surface; 20. an explosion-proof valve.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood as a specific case by a person skilled in the art.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element or elements, it can be directly connected to the other element or elements "on", "below", "in", "out", "directly", "via" or "indirectly" via intermediate elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to 6, the battery includes: the battery pack comprises a battery case 10, wherein the battery case 10 is provided with a through hole 11, and a first mounting part 12 and a second mounting part 13 are arranged on the battery case 10 along the axial direction of the through hole 11; the explosion-proof valve 20 is mounted on at least one of the explosion-proof valve 20, the first mounting portion 12 and the second mounting portion 13 to seal the through hole 11.

The utility model discloses a battery of embodiment includes battery housing 10 and explosion-proof valve 20, and explosion-proof valve 20 sets up on battery housing 10's through-hole 11 to when battery housing 10 internal pressure reaches a take the altitude, explosion-proof valve 20 can in time explode, with this realization quick pressure release, thereby guarantee the safety in service performance of battery. Because the battery shell 10 is provided with the first installation part 12 and the second installation part 13, the explosion-proof valve 20 can be selectively installed on the first installation part 12 and the second installation part 13, namely, at least two installation positions are provided for the installation of the explosion-proof valve 20, the explosion-proof valve 20 is arranged according to actual requirements, the installation of the explosion-proof valve 20 is facilitated, the installation efficiency of the explosion-proof valve 20 is improved, and the assembly performance of the battery is improved.

It should be noted that the battery case 10 is provided with the through hole 11, and the battery case 10 is provided with the first mounting portion 12 and the second mounting portion 13 along the axial direction of the through hole 11, that is, the explosion-proof valve 20 can be selectively mounted on the first mounting portion 12 and the second mounting portion 13, for example, when the first mounting portion 12 and the second mounting portion 13 are respectively close to the outer surface 14 and the inner surface 15 of the battery case 10, the explosion-proof valve 20 can be mounted on the second mounting portion 13 before the battery case 10 is sealed, or the explosion-proof valve 20 can be mounted on the first mounting portion 12 after the battery case 10 is sealed, so that the mounting timing and the mounting position of the explosion-proof valve 20 are not limited substantially, thereby increasing the mounting flexibility of the explosion-proof valve 20 and satisfying the whole mounting timing of the battery, and since the mounting position of the explosion-proof valve 20 is flexible, the assembly efficiency of the explosion-proof valve 20 can be improved to a certain extent, and the assembly timing of the explosion-proof valve 20 is not limited, and the assembly efficiency of the battery can be further improved.

Further, by providing the first mounting portion 12 and the second mounting portion 13 on the battery case 10, the explosion-proof valve 20 can be replaced according to the battery use time, for example, when the first mounting portion 12 and the second mounting portion 13 are respectively close to the outer surface 14 and the inner surface 15 of the battery case 10, the explosion-proof valve 20 can be first provided on the second mounting portion 13 and used on the battery for a long time, or when the explosion-proof valve 20 is found to be damaged by mistake, another explosion-proof valve 20 can be mounted on the first mounting portion 12, thereby satisfying the explosion-proof requirement.

When the explosion-proof valve 20 is replaced, the explosion-proof valve 20 that has been mounted does not necessarily need to be completely removed from the second mounting portion 13, for example, only the explosion-proof valve 20 is punctured, or a part of the explosion-proof valve 20 is removed, so long as the explosion-proof valve 20 can communicate the inside and the outside of the battery case 10, and the present invention is not limited thereto.

In some embodiments, one of the first and second mounting portions 12 and 13 may have an explosion-proof valve 20 mounted thereon, and the other may have another explosion-proof valve mounted thereon, and both the explosion-proof valve 20 and the other may be of an unbroken pressure relief structure, thereby achieving simultaneous explosion protection of the explosion-proof valve 20 and the other.

The explosion-proof valves 20 are mounted on the first mounting portion 12 and the second mounting portion 13, so that the explosion-proof protection performance of the explosion-proof valves 20 can be improved to a certain extent. For example, when the battery is invertd, explosion-proof valve 20 sets up with the bottom surface of box relatively, and explosion-proof valve 20 is towards the bottom surface of box promptly, and at this moment, towards the inside inlayer explosion-proof valve 20 of electric core can receive the corruption earlier, avoids outer explosion-proof valve 20 to receive the corruption to can guarantee that at least one explosion-proof valve 20 has good explosion-proof protection performance. Furthermore, the valve opening pressures of the two layers of the explosion-proof valves 20 are the same, and after the explosion of the inner layer explosion-proof valve 20, the outer layer explosion-proof valve 20 is directly pressed, so that the outer layer explosion-proof sheet is synchronously opened, and the explosion-proof protection performance of the explosion-proof valve 20 can be ensured.

In one embodiment, when at least a portion of the explosion-proof valve 20 is separated from one of the first mounting portion 12 and the second mounting portion 13, the other explosion-proof valve is mounted on the other, so that the battery can ensure a sealing effect when the battery is still usable, and the battery can continuously have an explosion-proof function.

For example, when the explosion-proof valve 20 is assembled for the first time, the explosion-proof valve 20 is mounted on the second mounting portion 13, and subsequently, when the explosion-proof valve 20 is replaced or the explosion-proof valve 20 is damaged by mistake, at least a part of the explosion-proof valve 20 needs to be separated from the second mounting portion 13, for example, the whole explosion-proof valve 20 is taken down from the second mounting portion 13, or the explosion-proof valve 20 is punctured, and then another explosion-proof valve is mounted on the first mounting portion 12 according to requirements, so that the explosion-proof requirements of the battery are met.

Note that, at least a part of the explosion-proof valve 20 is separated from one of the first mounting portion 12 and the second mounting portion 13, for example, at least a part of the explosion-proof valve 20 is separated from the first mounting portion 12, not particularly, the position where the explosion-proof valve 20 is connected to the first mounting portion 12 is necessarily separated from the first mounting portion 12, but may include that the explosion-proof valve 20 is punctured to form another through-hole flow passage, or that a part of the explosion-proof valve 20 is removed, for example, an outer edge portion of the explosion-proof valve 20 is connected to the first mounting portion 12, and when an intermediate portion of the explosion-proof valve 20 is removed or punctured, the explosion-proof valve 20 is also shown to be separated from the first mounting portion 12.

In one embodiment, the through hole 11 is an explosion-proof hole, that is, the through hole 11 may not be used for other functions, and only when the internal pressure of the battery is too high, the explosion-proof valve 20 is exploded, so that the gas is decompressed through the through hole 11.

In one embodiment, the through hole 11 is a liquid injection hole, i.e. the through hole 11 is used as both a liquid injection hole and an explosion-proof hole, so that the number of through holes on the battery case 10 is reduced, the process of the battery case 10 can be simplified to a certain extent, and the structural strength of the battery case 10 can be ensured.

The battery can realize the filling of the electrolyte through the through hole 11, and after the filling of the electrolyte is finished, the sealing of the through hole 11 can be realized through the explosion-proof valve 20, and if the electrolyte needs to be replenished to the battery later, at least part of the explosion-proof valve 20 can be separated from the battery shell 10, so that the electrolyte is replenished through the through hole 11, and another explosion-proof valve is installed on the battery shell 10.

For example, after the electrolyte is injected through the through hole 11, the explosion-proof valve 20 may be mounted on the second mounting portion 13, and after the battery is used for a long time, the battery needs to be replenished with the electrolyte, in which case, at least a part of the explosion-proof valve 20 may be separated from the second mounting portion 13, for example, the explosion-proof valve 20 may be punctured, and after the electrolyte is replenished through the through hole 11, another explosion-proof valve may be mounted on the first mounting portion 12, thereby achieving sealing of the through hole 11 again.

In some embodiments, the battery case 10 may further be provided with a first electrolyte injection hole, and the first electrolyte injection of the battery may be performed through the first electrolyte injection hole, and during subsequent electrolyte replenishment, the first electrolyte injection may be performed through the through hole 11, so as to ensure that the electrolyte replenishment of the battery can be performed after a long time of use.

For example, in the assembly process of the battery, the explosion-proof valve 20 is installed on the second installation part 13, electrolyte is injected through the first injection hole, after the injection is completed, the first injection hole can be sealed through the sealing structure, and the difficulty of the disassembly of the sealing structure is relatively large, so that at least part of the explosion-proof valve 20 can be separated from the second installation part 13 if the electrolyte needs to be replenished, then the replenishment of the electrolyte is realized through the through hole 11, and after the replenishment of the electrolyte is completed, another explosion-proof valve is installed on the first installation part 12, so that the sealing of the through hole 11 is realized again.

In one embodiment, as shown in fig. 1 to 6, the first mounting portion 12 and the second mounting portion 13 are disposed near the outer surface 14 and the inner surface 15 of the battery case 10, respectively, so that the first mounting portion 12 and the second mounting portion 13 can be reasonably distributed on the battery case 10, and the explosion-proof valve 20 can be conveniently mounted.

In one embodiment, the first and second mounting parts 12 and 13 may be the outer and inner surfaces 14 and 15, respectively, of the battery case 10, that is, the two ports of the through-hole 11 are located on the outer and inner surfaces 14 and 15, respectively, and the outer and inner surfaces 14 and 15 of the battery case 10 do not have a projection-like or recess-like structure at the location where the through-hole 11 is formed, and thus, the explosion-proof valve 20 may be directly attached to the outer or inner surface 14 or 15 of the battery case 10.

In one embodiment, the first and second mounting parts 12 and 13 may be protrusions on the battery case 10, respectively, and the explosion-proof valve 20 may be mounted on the protrusions.

In one embodiment, as shown in fig. 2 and 4 to 6, the first mounting portion 12 is a first groove disposed around one end of the through hole 11, and the second mounting portion 13 is a second groove disposed around the other end of the through hole 11, wherein at least a portion of the explosion-proof valve 20 is located in the first groove or the second groove, so that a height space where the explosion-proof valve 20 is accumulated can be avoided or reduced, thereby making reasonable use of the space of the battery case 10 and improving the space utilization of the battery case 10.

When the explosion-proof valve 20 is located in the first groove or the second groove, because the explosion-proof valve 20 utilizes the thickness space of the battery case 10, therefore, the explosion-proof valve 20 does not accumulate the height space too much, for example, when the explosion-proof valve 20 is disposed in the second groove, the explosion-proof valve 20 may not occupy the internal space of the battery case 10, or, when the explosion-proof valve 20 is disposed in the first groove, the explosion-proof valve 20 may not occupy the external space of the battery case 10, which not only saves the height space, but also can realize the effective protection of the explosion-proof valve 20.

In one embodiment, at least a portion of the explosion-proof valve 20 is detachably mounted in the second groove, so that another explosion-proof valve can be mounted in the first groove after at least a portion of the explosion-proof valve 20 is separated from the second groove, thereby ensuring that the battery can continuously have an explosion-proof function.

The through hole 11 can be used as a liquid filling hole, when the liquid is filled into the battery, at least a part of the explosion-proof valve 20 can be separated from the second groove, for example, the explosion-proof valve 20 is punctured, so that the electrolyte is filled through the through hole 11, and after the liquid filling is completed, another explosion-proof valve can be installed in the first groove, so as to seal the through hole 11 and ensure the explosion-proof function of the battery.

In one embodiment, along the axial direction of the through hole 11, the orthographic projections of the first groove and the second groove on the same plane are a first orthographic projection and a second orthographic projection respectively, and at least part of the first orthographic projection is overlapped with the second orthographic projection, so that the arrangement of the first groove and the second groove is facilitated on the basis that the explosion-proof valve 20 can seal the through hole 11, and the manufacturing efficiency of the battery shell 10 is improved.

In one embodiment, as shown in fig. 2 and 4, the first orthographic projection and the second orthographic projection are completely overlapped, so that the explosion-proof valves with the same size can be installed in the first groove and the second groove, the universality of the explosion-proof valves is improved, the installation difficulty of the explosion-proof valves can be reduced, and after all, the corresponding explosion-proof valves do not need to be selected according to the installation positions.

In one embodiment, as shown in fig. 5, the first orthographic projection is located in the middle of the second orthographic projection, that is, the cross-sectional area of the first groove may be smaller than that of the second groove, so that the side walls of the first groove and the second groove are spaced, and the problem that the side wall of the battery case 10 where the first groove and the second groove are formed is thin can be avoided to some extent, so as to improve the structural strength of the battery case 10 and further ensure the installation strength of the explosion-proof valve.

In one embodiment, as shown in fig. 6, the second orthographic projection is located in the middle of the first orthographic projection, that is, the cross-sectional area of the first groove may be larger than that of the second groove, so that the side walls of the first groove and the second groove are spaced, and the problem that the side wall of the battery case 10 where the first groove and the second groove are formed is thinner can be avoided to some extent, so as to improve the structural strength of the battery case 10 and further ensure the installation strength of the explosion-proof valve.

In one embodiment, the depth of the first groove is consistent with the depth of the second groove, so that an explosion-proof valve with relatively consistent thickness can be used, and the processing efficiency of the first groove and the second groove can be improved.

In some embodiments, it is not excluded that the depth of the first groove does not coincide with the depth of the second groove.

In an embodiment, the depth of the first groove is smaller than the minimum distance between the first groove and the second groove, and/or the depth of the second groove is smaller than the minimum distance between the first groove and the second groove.

The degree of depth of first recess is less than the thickness of battery case 10 between first recess and the second recess to guarantee battery case 10's structural strength, avoid battery case 10 to appear the risk of structural failure, guarantee with this that explosion-proof valve can connect on battery case 10 steadily, and then guarantee the safety in service performance of battery.

Correspondingly, the degree of depth of second recess is less than battery case 10's between first recess and the second recess thickness to guarantee battery case 10's structural strength, avoid battery case 10 to appear the risk of structural failure, guarantee that explosion-proof valve can connect on battery case 10 steadily with this, and then guarantee the safety in utilization performance of battery.

In one embodiment, the battery may further include a battery cell disposed in the battery housing 10, and the battery cell may be electrically connected to the battery housing 10, or the battery cell may be connected to a pole assembly on the battery housing 10.

Note that the battery includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The cell refers to a unit formed by winding or laminating a stacking part, wherein the stacking part comprises a first pole piece, a partition and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active materials.

In one embodiment, the battery may be a prismatic battery, that is, the battery may be a prismatic battery, which mainly refers to a straight line whose shape is a prism, but does not strictly limit whether each edge of the prism is strictly defined, and the corner between the edges is not necessarily a right angle, and may be an arc transition.

The battery can be the lamination formula battery, and it is convenient not only to organize, and can process and obtain the longer battery of length. Specifically, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to first pole piece and second pole piece.

Alternatively, the battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

In one embodiment, the battery may be a cylindrical battery. The battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

In one embodiment, the battery case 10 may include a first case member and a second case member, which are connected. The through-opening 11 can be provided in the first housing part or in the second housing part. The first housing part may be a cover plate and the through hole 11 may be provided in the first housing part.

It should be noted that the first housing part and the second housing part may be provided separately. In some embodiments, it is not excluded that the first housing part and the second housing part may be of one integral structure, the space for accommodating the cell being formed by stamping and subsequently being connected in a closed manner by welding.

An embodiment of the utility model also provides a battery pack, including foretell battery.

The utility model discloses a group battery of embodiment includes the battery, and the battery includes battery housing 10 and explosion-proof valve 20, and explosion-proof valve 20 sets up on battery housing 10's through-hole 11 to when battery housing 10 internal pressure reaches a take the altitude, explosion-proof valve 20 can in time explode and open, with this realization quick pressure release, thereby guarantee the safety in service performance of battery. Because the battery shell 10 is provided with the first installation part 12 and the second installation part 13, the explosion-proof valve 20 can be selectively installed on the first installation part 12 and the second installation part 13, namely, at least two installation positions are provided for the installation of the explosion-proof valve 20, the explosion-proof valve 20 is arranged according to actual requirements, the installation of the explosion-proof valve 20 is facilitated, the installation efficiency of the explosion-proof valve 20 is improved, and the assembly performance of the battery pack is improved.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixing a plurality of batteries. The battery can be a cylindrical battery, and the battery module can further comprise a bracket, and the battery can be fixed on the bracket.

The battery pack includes a plurality of batteries and a case for fixing the plurality of batteries.

It should be noted that, the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the box body. Wherein, a plurality of batteries can form and install in the box behind the battery module. Or, a plurality of batteries can directly set up in the box, need not to carry out the group to a plurality of batteries promptly, utilizes the box to fix a plurality of batteries.

In one embodiment, the battery is disposed in the case, and the explosion-proof valve 20 is disposed opposite to the bottom surface of the case, i.e., the explosion-proof valve 20 of the battery may be directly facing the bottom surface of the case, for example, the case includes a bottom plate, in which case the explosion-proof valve 20 of the battery may be directly facing the bottom plate.

In some embodiments, the explosion-proof valve 20 may be disposed opposite a side of the case, for example, the case includes a frame, in which case the battery explosion-proof valve 20 may be directed toward the frame.

In some embodiments, the explosion-proof valve 20 may be disposed opposite the top surface of the case, for example, the case may include a cover plate, in which case the explosion-proof valve 20 of the battery may be directed toward the cover plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims (16)

1. A battery, comprising:

the battery comprises a battery shell (10), wherein a through hole (11) is formed in the battery shell (10), and a first mounting part (12) and a second mounting part (13) are arranged on the battery shell (10) along the axial direction of the through hole (11);

an explosion-proof valve (20), the explosion-proof valve (20) being mounted on at least one of the first mounting portion (12) and the second mounting portion (13) to seal the through hole (11).

2. The battery according to claim 1, wherein the first mounting portion (12) and the second mounting portion (13) are disposed adjacent to an outer surface (14) and an inner surface (15) of the battery case (10), respectively.

3. The battery according to claim 2, wherein the first mounting portion (12) is a first groove provided around one end of the through-hole (11), and the second mounting portion (13) is a second groove provided around the other end of the through-hole (11);

wherein at least part of the explosion-proof valve (20) is located within the first recess or the second recess.

4. The battery according to claim 3, wherein at least part of the explosion-proof valve (20) is detachably mounted in the second recess so that another explosion-proof valve can be mounted in the first recess after at least part of the explosion-proof valve (20) is disengaged from the second recess.

5. The battery according to claim 3, wherein orthographic projections of the first groove and the second groove on the same plane in the axial direction of the through hole (11) are a first orthographic projection and a second orthographic projection, respectively, and at least part of the first orthographic projection and the second orthographic projection coincide.

6. The battery of claim 5, wherein the first orthographic projection and the second orthographic projection are completely coincident.

7. The battery of claim 5, wherein the first orthographic projection is located in a middle of the second orthographic projection.

8. The battery of claim 5, wherein the second orthographic projection is located in a middle of the first orthographic projection.

9. The battery of claim 3, wherein the depth of the first groove coincides with the depth of the second groove.

10. The battery of claim 3, wherein the depth of the first groove is less than the minimum distance between the first groove and the second groove, and/or the depth of the second groove is less than the minimum distance between the first groove and the second groove.

11. The battery according to claim 1, wherein when at least a part of the explosion-proof valve (20) is separated from one of the first mounting portion (12) and the second mounting portion (13), the other is used for mounting another explosion-proof valve.

12. The battery according to any one of claims 1 to 11, wherein the through-hole (11) is a liquid injection hole.

13. The battery according to claim 12, wherein the battery case (10) is provided with a first-time liquid injection hole.

14. The battery according to claim 1, wherein the explosion-proof valve (20) is mounted on each of the first mounting portion (12) and the second mounting portion (13).

15. A battery comprising the cell of any one of claims 1 to 14.

16. The battery pack according to claim 15, further comprising a case in which the battery is disposed, the explosion-proof valve (20) being disposed opposite to a bottom surface of the case.

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