Battery and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and a battery pack, the battery is provided with a first direction, the battery comprises a shell, a first protection sheet and an anti-explosion valve, the shell is provided with a first accommodating cavity, the shell comprises a first wall, the first wall is provided with an anti-explosion hole which extends along the first direction and is communicated with the first accommodating cavity, and the anti-explosion valve is arranged on the first wall. The explosion-proof hole is provided with a first protection piece and an explosion-proof valve, the first protection piece is attached to the side, facing the first containing cavity, of the first wall and covers the explosion-proof hole, the explosion-proof valve is arranged in the explosion-proof hole and covers the explosion-proof hole, and the first protection piece and the explosion-proof hole are oppositely arranged in the first direction. The explosion-proof valve divides the explosion-proof hole into a first hole section close to the first containing cavity and a second hole section away from the first containing cavity, and a pressure guiding structure communicating the first containing cavity with the first hole section is arranged on the first wall and / or the first protection sheet. The first protection sheet can play a role in protecting the anti-explosion valve, and the pressure guiding structure can prevent the first protection sheet from affecting timely breakage of the anti-explosion valve.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery and battery pack. Background Technology

[0002] With the development and application of battery technology, the requirements for battery safety and stability are becoming increasingly stringent. One of the key factors determining battery safety is the reliability of the battery's explosion-proof valve. In existing bottom-mounted explosion-proof valve technology, the valve's burst stability presents significant uncertainties. This is primarily because the impact of electrolyte flow during battery filling can affect the valve's shape, leading to the risk of premature rupture before battery thermal runaway or difficulty in proper rupture during thermal runaway.

[0003] Therefore, there is an urgent need for a battery and battery pack to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a battery and battery pack that avoids the risk of the explosion-proof valve rupturing prematurely before the battery thermally runs away or failing to rupture properly when the battery thermally runs away.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery, having a first orientation, includes a housing, a first protective plate, and an explosion-proof valve. The housing has a first receiving cavity. The housing includes a first wall, and the first wall is provided with an explosion-proof hole extending along the first orientation and communicating with the first receiving cavity. The explosion-proof hole is provided with the first protective plate and the explosion-proof valve. The first protective plate is attached to the side of the first wall facing the first receiving cavity and covers the explosion-proof hole. The explosion-proof valve is disposed in the explosion-proof hole and seals the explosion-proof hole. The first protective plate and the explosion-proof hole are disposed opposite to each other along the first orientation.

[0007] The explosion-proof valve divides the explosion-proof hole into a first segment close to the first receiving cavity and a second segment away from the first receiving cavity. The first wall and / or the first protective plate are provided with a pressure-conducting structure that connects the first receiving cavity and the first segment.

[0008] As an improvement to the above technical solution, the first wall is provided with the pressure guiding structure, which is a pressure guiding groove. The pressure guiding groove is located on the side of the first wall facing the first receiving cavity. The pressure guiding groove is partially located between the first protective sheet and the first wall, and partially exposed outside the first protective sheet.

[0009] As an improvement to the above technical solution, multiple pressure guiding grooves are provided, and the multiple pressure guiding grooves are spaced apart along the circumference of the first hole segment.

[0010] As an improvement to the above technical solution, the first protective sheet is provided with the pressure guiding structure. The pressure guiding structure provided on the first protective sheet is a pressure guiding groove. The pressure guiding groove penetrates the first protective sheet along the first direction and is disposed opposite to the first hole segment.

[0011] As an improvement to the above technical solution, the pressure guiding groove includes a first pressure guiding groove and a second pressure guiding groove, and the first pressure guiding groove and the second pressure guiding groove are arranged intersectingly.

[0012] As an improvement to the above technical solution, the pressure guide groove is circular, polygonal, or arc-shaped.

[0013] As an improvement to the above technical solution, the battery further includes a second protective sheet, which is attached to the side of the first wall away from the first receiving cavity and covers the second hole segment. The explosion-proof valve is disposed between the first protective sheet and the second protective sheet, and both the first protective sheet and the second protective sheet are spaced apart from the explosion-proof valve.

[0014] As an improvement to the above technical solution, a first groove surrounding the second hole is provided on the side of the first wall away from the first receiving cavity, and the second protective plate is disposed in the first groove and fits against the bottom of the first groove.

[0015] As an improvement to the above technical solution, the bottom of the first groove is provided with a second groove surrounding the explosion-proof hole, and the explosion-proof valve is disposed in the second groove and fits against the bottom of the second groove.

[0016] As an improvement to the above technical solution, the second groove is a stepped groove, the second groove having a first opening groove close to the first groove and a second opening groove away from the first groove, and the explosion-proof valve is disposed in the second opening groove.

[0017] A battery pack includes a housing, a partition, and a battery pack, wherein the battery pack includes a plurality of batteries as described in any of the preceding claims;

[0018] The housing is provided with a second receiving cavity, and the partition plate is disposed in the second receiving cavity, dividing the second receiving cavity into a battery receiving cavity and an exhaust space. The partition plate is provided with a plurality of exhaust holes arranged in an array, and the exhaust holes connect the battery receiving cavity and the exhaust space.

[0019] The battery pack is disposed in the battery housing cavity, the second hole segment is disposed corresponding to the exhaust hole, and along the first direction, the orthogonal projection of the explosion-proof valve on the partition plate is located in the corresponding exhaust hole.

[0020] Beneficial effects:

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] In this invention, during the process of injecting electrolyte into the casing, the first protective plate protects the explosion-proof valve, preventing the electrolyte from directly impacting the valve and causing deformation. This avoids the risk of the explosion-proof valve rupturing prematurely before the battery thermally runs away or failing to rupture properly during thermal runaway. Furthermore, a pressure-guiding structure connecting the first receiving cavity and the explosion-proof hole is provided on the first wall and / or the first protective plate. This allows the internal pressure of the battery to directly act on the explosion-proof valve through the pressure-guiding structure when thermal runaway causes an increase in internal pressure, preventing the presence of the first protective plate from affecting the timely rupture of the explosion-proof valve. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the battery structure provided in this embodiment of the utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the battery structure provided in this embodiment of the utility model. Figure 2 ;

[0025] Figure 3 This is a partial structural diagram of the battery provided in Embodiment 1 of this utility model. Figure 1 ;

[0026] Figure 4 This is a partial structural diagram of the battery provided in Embodiment 1 of this utility model. Figure 2 ;

[0027] Figure 5 This is a partial structural diagram of the battery provided in Embodiment 1 of this utility model. Figure 3 ;

[0028] Figure 6 yes Figure 5 Sectional view at point AA;

[0029] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0030] Figure 8 This is a partial structural diagram of the battery provided in Embodiment 1 of this utility model. Figure 4 ;

[0031] Figure 9 This is a partial structural diagram of the battery provided in Embodiment 1 of this utility model. Figure 5 ;

[0032] Figure 10This is a schematic diagram of the structure of the second protective sheet of the battery provided in Embodiment 1 of this utility model;

[0033] Figure 11 This is a top view of the cavity of the battery provided in Embodiment 1 of this utility model;

[0034] Figure 12 yes Figure 11 Sectional view at CC;

[0035] Figure 13 yes Figure 12 Enlarged view of point D in the middle;

[0036] Figure 14 This is a top view of the cavity of the battery provided in Embodiment 2 of this utility model;

[0037] Figure 15 yes Figure 14 Sectional view at EE;

[0038] Figure 16 yes Figure 15 Enlarged view at point F;

[0039] Figure 17 This is a top view of the cavity of the battery provided in Embodiment 3 of this utility model;

[0040] Figure 18 This is a schematic diagram of a portion of the structure of the battery pack provided in Embodiment 4 of this utility model.

[0041] In the picture:

[0042] 1. Shell;

[0043] 100. First receiving cavity;

[0044] 11. The First Wall;

[0045] 111, Explosion-proof hole; 1111, First hole section; 1112, Second hole section;

[0046] 112. Pressure guiding groove; 113. First groove; 114. Second groove; 1141. First opening groove; 1142. Second opening groove;

[0047] 12. First protective plate; 121. Pressure guiding groove; 1211. First pressure guiding groove; 1212. Second pressure guiding groove;

[0048] 13. Explosion-proof valve;

[0049] 14. Second protective plate; 141. Through hole;

[0050] 15. Cavity; 16. Top cover;

[0051] 2. Electrode assembly;

[0052] 10. Housing; 101. Second receiving cavity; 1011. Battery receiving cavity; 1012. Exhaust space;

[0053] 20. Partition plate; 201. Vent hole;

[0054] 30. Battery pack. Detailed Implementation

[0055] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0056] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0059] Example 1

[0060] like Figures 1-13As shown, this embodiment provides a battery with a first direction X, which in this embodiment is the height direction of the battery. The battery includes a housing 1, a first protective sheet 12, an explosion-proof valve 13, and an electrode assembly 2. The housing 1 has a first receiving cavity 100, and the electrode assembly 2 is located in the first receiving cavity 100. The housing 1 includes a first wall 11, and the first wall 11 is provided with an explosion-proof hole 111 extending along the first direction X and communicating with the first receiving cavity 100. The first protective sheet 12 is attached to the side of the first wall 11 facing the first receiving cavity 100 and covers the explosion-proof hole 111. Those skilled in the art will understand that in order for the first protective sheet 12 to be attached to the first wall 11, the circumferential edge of the first protective sheet 12 needs to overlap with the area of ​​the first wall 11 surrounding the explosion-proof hole 111. The explosion-proof valve 13 is disposed in the explosion-proof hole 111 and seals the explosion-proof hole 111. The first protective sheet 12 and the explosion-proof hole 111 are disposed opposite each other along the first direction X. The explosion-proof valve 13 divides the explosion-proof hole 111 into a first hole segment 1111 that is close to the first receiving cavity 100 and a second hole segment 1112 that is far away from the first receiving cavity 100. The first wall 11 and / or the first protective plate 12 are provided with a pressure guiding structure that connects the first receiving cavity 100 and the first hole segment 1111.

[0061] In the battery provided in this embodiment, during the process of injecting electrolyte into the casing 1, the first protective plate 12 can protect the explosion-proof valve 13, preventing the electrolyte from directly eroding the explosion-proof valve 13 and causing it to deform. This avoids the risk that the explosion-proof valve 13 will rupture prematurely before the battery thermally runs away or will be unable to rupture properly during battery thermal runaway. Furthermore, a pressure-conducting structure connecting the first receiving cavity 100 and the first hole segment 1111 is provided on the first wall 11 and / or the first protective plate 12. This allows the internal pressure of the battery to directly act on the explosion-proof valve 13 through the pressure-conducting structure when the internal pressure increases due to battery thermal runaway, preventing the presence of the first protective plate 12 from affecting the timely rupture of the explosion-proof valve 13.

[0062] In this embodiment, a pressure-guiding structure is provided on the first wall 11, while no pressure-guiding structure is provided on the first protective sheet 12. The pressure-guiding structure provided on the first wall 11 is a pressure-guiding groove 112, which is located on the side of the first wall 11 facing the first receiving cavity 100. Part of the pressure-guiding groove 112 is located between the first protective sheet 12 and the first wall 11, and part is exposed outside the first protective sheet 12. When the battery thermal runaway causes an increase in internal battery pressure, the internal battery pressure can directly act on the explosion-proof valve 13 through the pressure-guiding groove 112, preventing the presence of the first protective sheet 12 from affecting the timely rupture of the explosion-proof valve 13. Furthermore, compared to the relatively large diameter pressure-guiding hole, the portion of the pressure-guiding groove 112 covered by the first protective sheet 12 can reduce the risk of solid particles (electrode material particles) in the electrolyte entering below the first protective sheet 12 while achieving pressure transmission, thereby reducing the risk of solid particles adhering to the explosion-proof valve 13 and causing corrosion of the explosion-proof valve 13.

[0063] Optionally, such as Figure 5 and Figure 11 As shown, multiple pressure guiding grooves 112 are provided, and the multiple pressure guiding grooves 112 are spaced apart along the circumference of the first hole section 1111 to improve the pressure guiding effect of the pressure guiding grooves 112 and avoid some pressure guiding grooves 112 being blocked, which would cause the pressure in the first receiving cavity 100 to not act on the explosion-proof valve 13 in time.

[0064] Optionally, such as Figure 3 , Figure 7 and Figure 9 As shown, the battery also includes a second protective sheet 14. The second protective sheet 14 is attached to the side of the first wall 11 facing away from the first receiving cavity 100 and covers the second hole segment 1112. The second protective sheet 14 protects the explosion-proof valve 13, preventing it from directly contacting the outside environment. The explosion-proof valve 13 is disposed between the first protective sheet 12 and the second protective sheet 14, and both the first and second protective sheets 12 and 14 are spaced apart from the explosion-proof valve 13 to reduce the impact of the presence of the first and second protective sheets 12 on the normal rupture of the explosion-proof valve 13. In this embodiment, both the first and second protective sheets 12 and 14 are made of insulating material.

[0065] Furthermore, such as Figure 9 and Figure 10 As shown, the second protective plate 14 is provided with a through hole 141 extending through the second protective plate 14 along the first direction X. The through hole 141 communicates with the second hole section 1112 of the explosion-proof hole 111. During the process of the explosion-proof valve 13 rupturing under pressure, the through hole 141 can keep the pressure on the side of the explosion-proof valve 13 facing the second protective plate 14 basically consistent with the external pressure, thereby ensuring that the explosion-proof valve 13 can rupture normally. Specifically, the through hole 141 is a strip-shaped hole, and multiple through holes 141 are arranged at intervals to improve the effect of the through holes 141 in maintaining the air pressure balance on both sides of the second protective plate 14.

[0066] Furthermore, such as Figure 7 , Figure 12 and Figure 13 As shown, a first groove 113 surrounding the second hole segment 1112 is provided on the side of the first wall 11 away from the first receiving cavity 100. The second protective plate 14 is disposed in the first groove 113 and fits against the bottom of the first groove 113. By setting the first groove 113, the second protective plate 14 will not protrude from the bottom surface of the housing 1. This arrangement can play a certain protective role for the second protective plate 14 and prevent the force between the bottom surface of the battery and the outside from concentrating on the second protective plate 14.

[0067] Furthermore, such as Figure 7 , Figure 12 and Figure 13As shown, the bottom of the first groove 113 is provided with a second groove 114 surrounding the explosion-proof hole 111. The explosion-proof valve 13 is disposed in the second groove 114 and fits against the bottom of the second groove 114, so that the explosion-proof valve 13 and the first protective plate 12 can be spaced apart. Specifically, the periphery of the side of the first protective plate 12 facing the bottom of the second groove 114 is bonded to the bottom of the second groove 114 with adhesive.

[0068] Furthermore, such as Figure 7 , Figure 12 and Figure 13 As shown, the second groove 114 is a stepped groove, having a first opening groove 1141 near the first groove 113 and a second opening groove 1142 away from the first groove 113. The explosion-proof valve 13 is disposed in the second opening groove 1142, allowing the explosion-proof valve 13 and the second protective plate 14 to be spaced apart. Specifically, the periphery of the side of the second protective plate 14 facing the bottom of the second opening groove 1142 is bonded to the bottom of the second opening groove 1142 with adhesive.

[0069] Optionally, the housing 1 includes a cavity 15 and a top cover 16. The top cover 16 covers the top of the cavity 15, and the first wall 11 is the bottom surface of the cavity 15. That is to say, the top cover 16 and the first wall 11 are arranged opposite to each other along the first direction X, and the first receiving cavity 100 is formed by the top cover 16 and the cavity 15.

[0070] Example 2

[0071] like Figures 14-16 As shown, this embodiment provides a battery. The battery in this embodiment is basically the same as that in the first embodiment. The difference is that in this embodiment, the first wall 11 of the housing 1 is not provided with a pressure guiding groove 112, but a pressure guiding groove 121 is provided on the first protective sheet 12 that penetrates the first protective sheet 12 along the first direction X. The pressure guiding groove 121 is arranged opposite to the first hole segment 1111.

[0072] In this embodiment, during the process of injecting electrolyte into the casing 1, the first protective plate 12 protects the explosion-proof valve 13, preventing the electrolyte from directly eroding the valve and causing deformation. This avoids the risk of the explosion-proof valve 13 rupturing prematurely before thermal runaway or failing to rupture properly during thermal runaway. Furthermore, pressure-conducting grooves 121 are provided on the first protective plate 12 so that when the internal pressure of the battery increases due to thermal runaway, the internal pressure can directly act on the explosion-proof valve 13 through the pressure-conducting grooves 121, preventing the presence of the first protective plate 12 from affecting the timely rupture of the explosion-proof valve 13. Compared to relatively large-diameter pressure-conducting holes, the pressure-conducting grooves 121, while achieving pressure transmission, reduce the risk of solid particles (electrode material particles) in the electrolyte entering below the first protective plate 12, thereby reducing the risk of solid particles adhering to the explosion-proof valve 13 and causing corrosion.

[0073] Optionally, such as Figure 14 As shown, multiple pressure-guiding grooves 121 are provided to improve the pressure-guiding effect. The pressure-guiding grooves 121 include a first pressure-guiding groove 1211 and a second pressure-guiding groove 1212, which are intersected. In this embodiment, the intersecting first pressure-guiding grooves 1211 and second pressure-guiding grooves 1212 can be in the shape of a cross, an X, or a grid. In other embodiments, pressure-guiding grooves 121 of other shapes can also be provided, such as circular, polygonal, or arc-shaped pressure-guiding grooves 121. In this embodiment, the intersection of the first pressure-guiding groove 1211 and the second pressure-guiding groove 1212 is located on the center line of the first hole segment 1111.

[0074] Furthermore, such as Figure 16 As shown, the through hole 141 and the pressure guiding groove 121 are arranged opposite to each other along the first direction X to ensure the overall pressure guiding effect of the through hole 141 and the pressure guiding groove 121.

[0075] Example 3

[0076] like Figure 17 As shown, this embodiment provides a battery. The battery in this embodiment is basically the same as that in embodiment one. The difference is that in this embodiment, the first wall 11 and the first protective sheet 12 of the housing 1 are provided with pressure guiding structures. The pressure guiding structure on the first wall 11 is a pressure guiding groove 112. The specific setting method of the pressure guiding groove 112 is the same as that in embodiment one. The pressure guiding structure on the first protective sheet 12 is a pressure guiding groove 121. The specific setting method of the pressure guiding groove 121 is the same as that in embodiment two.

[0077] In this embodiment, the battery has a pressure-guiding groove 112 on the first wall 11 and a pressure-guiding groove 121 on the first protective sheet 12. When the internal pressure of the battery increases due to thermal runaway, the pressure-guiding effect can be further improved, so that the explosion-proof valve 13 can rupture in time.

[0078] Example 4

[0079] like Figure 18 As shown, this embodiment provides a battery pack, including a housing 10, a partition plate 20, and a battery pack 30. The battery pack 30 includes multiple batteries of Embodiment 1 or multiple batteries of Embodiment 2. The housing 10 has a second receiving cavity 101. The partition plate 20 is disposed in the second receiving cavity 101 and divides the second receiving cavity 101 into a battery receiving cavity 1011 and an exhaust space 1012. The partition plate 20 has multiple exhaust holes 201 arranged in an array, which connect the battery receiving cavity 1011 and the exhaust space 1012. The battery pack 30 is disposed in the battery receiving cavity 1011. The second hole segment 1112 is correspondingly disposed with the exhaust hole 201, and along the first direction X, the orthogonal projection of the explosion-proof valve 13 on the partition plate 20 is located in the corresponding exhaust hole 201.

[0080] In this embodiment, when the battery in the battery pack 30 experiences thermal runaway, the internal pressure of the battery acts directly on the explosion-proof valve 13 through the pressure guide groove 112 or pressure guide groove 121. The explosion-proof valve 13 ruptures, and the ejected material generated by the thermal runaway of the battery enters the exhaust space 1012 through the explosion-proof hole 111 and is discharged from the battery pack through the exhaust space 1012.

[0081] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery having a first orientation (X), characterized in that, The device includes a housing (1), a first protective plate (12), and an explosion-proof valve (13). The housing (1) has a first receiving cavity (100). The housing (1) includes a first wall (11). The first wall (11) is provided with an explosion-proof hole (111) extending along the first direction (X) and communicating with the first receiving cavity (100). The first protective plate (12) is attached to the side of the first wall (11) facing the first receiving cavity (100) and covers the explosion-proof hole (111). The explosion-proof valve (13) is disposed in the explosion-proof hole (111) and seals the explosion-proof hole (111). The first protective plate (12) and the explosion-proof hole (111) are disposed opposite to each other along the first direction (X). The explosion-proof valve (13) divides the explosion-proof hole (111) into a first hole segment (1111) close to the first receiving cavity (100) and a second hole segment (1112) away from the first receiving cavity (100). The first wall (11) and / or the first protective plate (12) are provided with a pressure guiding structure that connects the first receiving cavity (100) and the first hole segment (1111).

2. The battery according to claim 1, characterized in that, The first wall (11) is provided with the pressure guiding structure, which is a pressure guiding groove (112). The pressure guiding groove (112) is located on the side of the first wall (11) facing the first receiving cavity (100). The pressure guiding groove (112) is partially located between the first protective plate (12) and the first wall (11), and partially exposed outside the first protective plate (12).

3. The battery according to claim 2, characterized in that, The pressure guiding groove (112) is provided in multiple ways, and the multiple pressure guiding grooves (112) are arranged at intervals along the circumference of the first hole segment (1111).

4. The battery according to any one of claims 1-3, characterized in that, The first protective sheet (12) is provided with the pressure guiding structure. The pressure guiding structure provided on the first protective sheet (12) is a pressure guiding groove (121). The pressure guiding groove (121) penetrates the first protective sheet (12) along the first direction (X) and is provided opposite to the first hole segment (1111).

5. The battery according to claim 4, characterized in that, The pressure guiding groove (121) includes a first pressure guiding groove (1211) and a second pressure guiding groove (1212), which are arranged in an intersecting manner.

6. The battery according to claim 4, characterized in that, The pressure guide groove (121) is circular, polygonal, or arc-shaped.

7. The battery according to claim 1, characterized in that, The battery also includes a second protective sheet (14), which is attached to the side of the first wall (11) away from the first receiving cavity (100) and covers the second hole segment (1112). The explosion-proof valve (13) is disposed between the first protective sheet (12) and the second protective sheet (14), and both the first protective sheet (12) and the second protective sheet (14) are spaced apart from the explosion-proof valve (13).

8. The battery according to claim 7, characterized in that, The first wall (11) is provided with a first groove (113) surrounding the second hole segment (1112) on the side opposite to the first receiving cavity (100). The second protective plate (14) is disposed in the first groove (113) and fits against the bottom of the first groove (113).

9. The battery according to claim 8, characterized in that, The bottom of the first groove (113) is provided with a second groove (114) surrounding the explosion-proof hole (111), and the explosion-proof valve (13) is disposed in the second groove (114) and fits against the bottom of the second groove (114).

10. The battery according to claim 9, characterized in that, The second groove (114) is a stepped groove. The second groove (114) has a first opening groove (1141) close to the first groove (113) and a second opening groove (1142) away from the first groove (113). The explosion-proof valve (13) is disposed in the second opening groove (1142).

11. A battery pack, characterized in that, It includes a housing (10), a partition plate (20), and a battery pack (30), wherein the battery pack (30) includes a plurality of batteries as described in any one of claims 1-10; The housing (10) is provided with a second receiving cavity (101), and the partition plate (20) is provided in the second receiving cavity (101) and divides the second receiving cavity (101) into a battery receiving cavity (1011) and an exhaust space (1012). The partition plate (20) is provided with a plurality of exhaust holes (201) arranged in an array, and the exhaust holes (201) connect the battery receiving cavity (1011) and the exhaust space (1012). The battery pack (30) is disposed in the battery receiving cavity (1011), the second hole segment (1112) is disposed corresponding to the exhaust hole (201), and along the first direction (X), the orthogonal projection of the explosion-proof valve (13) on the partition plate (20) is located in the corresponding exhaust hole (201).

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