CN220856826U

CN220856826U - Battery and battery device

Info

Publication number: CN220856826U
Application number: CN202322466082.6U
Authority: CN
Inventors: 赵冬
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2024-04-26
Anticipated expiration: 2033-09-11

Abstract

The utility model relates to the technical field of batteries, and provides a battery and a battery device, wherein the battery comprises: the battery comprises a battery shell and a pressure relief structure, wherein the pressure relief structure is arranged on the battery shell, and a plurality of nicks are formed on the pressure relief structure; wherein at least part of the scores are intersected to form a cross points, the residual thickness of the pressure release structure at the score position is d1 mm, and a/d1 is 0.01-0.1. The battery can ensure the stability of the pressure relief structure to avoid abnormal explosion of the pressure relief structure, and simultaneously can be conveniently and rapidly exploded through the concentrated crossing points of stress under the condition of thermal runaway.

Description

Battery and battery device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery and a battery device.

Background

In the related art, the pressure release structure of the battery may be formed by scoring. However, the relief structure formed by the score has the problem of being not easy to burst or being abnormally burst.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of utility model

The utility model provides a battery which can solve the technical problems that a pressure release structure is not easy to explode and is abnormally exploded.

The battery includes:

a battery case;

the pressure relief structure is arranged on the battery shell and is provided with a plurality of scores;

Wherein at least part of the scores are intersected to form a cross points, the residual thickness of the pressure release structure at the score position is d 1mm, and a/d1 is 0.01-0.1.

The residual thickness of the pressure relief structure at the notch position and the number of notch crossing points influence the stability and the sensitivity of the pressure relief structure. The greater the residual thickness of the pressure relief structure at the notch position is, the less the pressure relief structure is prone to explosion; the more the number of the notch crossing points is, the higher the sensitivity of the pressure relief structure is, and the pressure relief structure is more easily exploded. The utility model sets the ratio of the number of the notch crossing points and the residual thickness of the notch to be proper. On the one hand, the pressure release structure is not difficult to burst due to the fact that the a/d1 is too small; on the other hand, the pressure release structure is not abnormally exploded due to the overlarge a/d 1.

The utility model also provides a battery device which comprises the battery, and the battery device also has better safety stability.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

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 have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views.

Wherein:

fig. 1 is a schematic view of the structure of an exemplary embodiment of a battery of the present disclosure;

FIG. 2 is a top view of an exemplary embodiment of a battery of the present disclosure;

Fig. 3 is a cross-sectional view of the battery of fig. 2 along the broken line AA;

Fig. 4 is a schematic structural view of an exemplary embodiment of a battery device of the present disclosure.

Reference numerals illustrate:

1. A battery case; 11. a first sidewall; 13. large surface; 14. facets; 2. a pressure relief structure; 21. scoring; 3. an intersection; 31. a first intersection; 32. a second intersection; 33. a third intersection; 4. a heat exchange assembly; 5. a battery case; 51. a bottom plate.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying 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, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being "on," "under," or "in" or "out" of another element or feature being "on," "under" or "in" or "out" of the other element or elements, it can be directly connected to the other element or elements, or indirectly connected to the other element or elements via intervening elements.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone.

Fig. 1-3 are schematic structural views of an exemplary embodiment of a battery of the present disclosure, fig. 2 is a top view of an exemplary embodiment of a battery of the present disclosure, and fig. 3 is a cross-sectional view of the battery of fig. 2 along a broken line AA.

The battery includes: the battery comprises a battery shell 1 and a pressure relief structure 2, wherein the pressure relief structure 2 is arranged on the battery shell 1, and a plurality of scores 21 are formed on the pressure relief structure 2; wherein at least part of the scores 21 intersect to form a intersecting points 3, the residual thickness of the pressure release structure 2 at the position of the scores 21 is d 1mm, and a/d1 is 0.01-0.1.

The residual thickness of the relief structure 2 at the location of the score 21 and the number of score intersections 3 can affect the stability and sensitivity of the relief structure 2. The greater the residual thickness of the pressure relief structure 2 at the position of the notch 21 is, the less explosive the pressure relief structure 2 is; the greater the number of scored intersections 3, the greater the sensitivity of the relief structure 2 and the more susceptible the relief structure 2 to explosion. The present exemplary embodiment sets the ratio of the number of score crossing points and the score residual thickness to an appropriate size. On the one hand, the pressure release structure 2 is not difficult to burst due to the fact that the a/d1 is too small; on the other hand, the pressure release structure 2 is not abnormally exploded due to the overlarge a/d 1.

In the present exemplary embodiment, a/d1 may be equal to 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, and the like.

In the present exemplary embodiment, as shown in fig. 1 to 3, a part of the structure of the battery case 1 may be multiplexed as the pressure relief structure 2, and the score 21 may be directly formed by punching or etching the battery case 1. The arrangement not only can improve the overall strength of the pressure relief structure 2 and the battery shell 1, but also can reduce the process difficulty in the battery manufacturing process. In the present exemplary embodiment, the battery case 1 may include a main case having an opening formed therein, and a cover plate closing over the opening of the main case. Wherein, part of the structure of the cover plate can be multiplexed into a pressure relief structure 2, namely, the nick 21 is directly formed on the cover plate; or part of the structure of the main housing is multiplexed into the relief structure 2, i.e. the score 21 is formed directly on the main housing. It should be understood that in other exemplary embodiments, the pressure relief structure 2 and the battery case 1 may be a separate structure, and the pressure relief structure 2 may be connected to the battery case 1 by welding, riveting, or the like.

In the present exemplary embodiment, the main casing may be of an integral structure, i.e., a main casing non-spliced structure, and for example, the main casing may be formed by an integral molding process such as extrusion molding, stretch molding, or the like. In the present exemplary embodiment, the thicknesses of the main housing and the cover plate may be the same or different, and the materials of the main housing and the cover plate may be the same or different.

In the present exemplary embodiment, the scores 21 may be formed at the outer surface of the battery case 1.

In the present exemplary embodiment, a may be 5 or less. For example, a may be equal to 1, 2, 3, 4, 5, etc. Because the pressure release structure 2 is etched twice at the position of the cross point 3, the strength of the position of the cross point 3 on the pressure release structure 2 is weak, and when the battery is in thermal runaway, the battery shell can be exploded from the position of the cross point 3. The value of a is too large, and the pressure release structure 2 can be exploded to too many positions, so that the pressure release structure is unstable, and the pressure release structure 2 is easy to be exploded abnormally; the value of a is too small, and when the battery is out of control, the pressure release structure is not easy to be exploded. The present exemplary embodiment sets the value of a to a suitable size, which can ensure both the stability of the pressure relief structure 2 and the sensitivity of the pressure relief structure 2.

In the present exemplary embodiment, as shown in fig. 1 to 3, the distance between any intersection 3 and the intersection 3 nearest thereto is 2mm to 30 mm. For example, the distance between any intersection 3 and the intersection 3 closest thereto may be 2mm, 3mm, 4 mm, 5mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, etc. The distance between two adjacent crossing points 3 is too small, and the number of points of the pressure release structure 2 which can be exploded in the same area is too large, so that the pressure release structure is unstable and is easy to be exploded abnormally; the distance between two adjacent crossing points 3 is too large, and the pressure release structure 2 is not easy to be exploded, so that the pressure release of the battery is not timely or insufficient. The distance between adjacent crossing points is set to a proper size in the present exemplary embodiment, and this arrangement can ensure both the stability of the pressure release structure and the sensitivity of the pressure release structure.

In the present exemplary embodiment, as shown in fig. 1 to 3, the battery case 1 may include a first sidewall 11, and a portion of the structure of the first sidewall 11 may be multiplexed into the pressure relief structure 2, and the scores 21 are directly formed on the outer surface of the first sidewall 11. Wherein the length of the single score 21 is L1 mm, the thickness of the first sidewall 11 is d2 mm, and L1/d2 is 3-100. For example, L1/d2 may be equal to 3, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, etc. The L1/d2 is too large, the length of the notch 21 is too large or the thickness of the first side wall 11 is too small, the stability of the pressure release structure 2 is low, and abnormal explosion of the pressure release structure 2 is easy to occur; too small L1/d2, too small length of the notch 21 or too large thickness of the first side wall 11, the pressure release structure 2 is not easy to burst, and thus the pressure release of the battery is not timely or insufficient. The present exemplary embodiment sets L1/d2 to an appropriate size, which can ensure both the stability of the pressure relief structure 2 and the sensitivity of the pressure relief structure 2.

It should be noted that, a portion of the side wall of the main housing in the battery housing may form the first side wall, and the cover plate in the battery housing may also form the first side wall. The thickness of the first sidewall 11 can be understood as: the thickness of the first side wall is located in the area outside the notch 21, wherein when the hole, the groove and the protrusion structure are formed on the first side wall 11, the thickness of the first side wall 11 is the thickness of the area outside the hole, the groove and the protrusion. In addition, when the score is formed by the stamping process, the edge of the score forms a thickened structure, and the thickness of the first sidewall 11 is the thickness of the region outside the thickened structure.

In the present exemplary embodiment, as shown in fig. 1 to 3, the thickness of the first sidewall 11 is d2 mm, and d1/d2 is 0.05 to 0.3. For example, d1/d2 may be equal to 0.05、0.06、0.07、0.08、0.09、0.1、0.11、0.12、0.13、0.14、0.15、0.16、0.17、0.18、0.19、0.2、0.21、0.22、0.23、0.24、0.25、0.26、0.27、0.28、0.29、0.3, etc. The pressure release structure 2 is not easy to burst due to the fact that d1/d2 is too small, d1/d2 is too large, and stability of the pressure release structure 2 is low. The present exemplary embodiment sets d1/d2 to a proper size, which can ensure both the stability of the pressure relief structure 2 and the sensitivity of the pressure relief structure 2.

In the present exemplary embodiment, as shown in fig. 1 to 3, a first center point is formed along a geometric center of the first sidewall 11, the geometric center of the at least one intersection 3 and the first center point being at a distance of 20 mm or less. For example, the distance of the geometric center of the at least one intersection point 3 from the first center point may be 1 millimeter, 2 millimeters, 3 millimeters, 4 millimeters, 5 millimeters, 6 millimeters, 7 millimeters, 8 millimeters, 9 millimeters, 10 millimeters, 11 millimeters, 12 millimeters, 13 millimeters, 14 millimeters, 15 millimeters, 16 millimeters, 17 millimeters, 18 millimeters, 19 millimeters, 20 millimeters, and the like. The closer the distance between the geometric center of the intersection 3 and the first center point is, the higher the overall structural stability of the pressure relief structure 2 is, and the present exemplary embodiment sets the distance between at least part of the geometric center of the intersection 3 and the first center point to 20 mm or less, which can improve the stability of the pressure relief structure 2.

In the present exemplary embodiment, as shown in fig. 1-3, the included angle between intersecting scores 21 is 70 ° -110 °. For example, the included angle between intersecting scores 21 may be 70 °, 75 °, 80 °, 85 °, 90 °, 95 °, 100 °, 105 °, 110 °, etc. The closer the included angle between the intersecting scores 21 is to 90 degrees, the pressure relief structure 2 can be uniformly exploded along the scores in different directions, so that the larger the area of the formed vent hole is, the more rapid the release of high-pressure gas in the battery is. The present exemplary embodiment provides an included angle between the intersecting scores 21 of 70 ° -110 ° approaching 90 °, which may facilitate rapid release of high pressure gas from the battery.

In the present exemplary embodiment, as shown in fig. 1 to 3, the plurality of intersections 3 may include: the first, second and third crossing points 31, 32, 33, i.e. the first, second and third crossing points 31, 32, 33 respectively form one crossing point 3. The first intersection 31 and the third intersection 33 may be centrosymmetric with respect to the second intersection 32. The arrangement can lead the first cross point 31, the second cross point 32 and the third cross point 33 to be distributed on a straight line at equal intervals, and the pressure release structure 2 can form larger exhaust holes around the second cross point 32 when the battery is in thermal runaway.

In the present exemplary embodiment, as shown in fig. 1-3, the residual thickness of the relief structure 2 at the second intersection 32 is smaller than the residual thickness of the relief structure 2 at the first intersection 31; and/or the residual thickness of the relief structure 2 at the second intersection 32 is smaller than the residual thickness of the relief structure 2 at the third intersection 33. The present exemplary embodiment sets the residual thickness of the pressure release structure 2 at the position of the second crossing point 32 to a small value, and in the event of thermal runaway of the battery, the pressure release structure 2 may burst along the score 21 from the position of the second crossing point 32, which may facilitate the formation of the vent hole in a predetermined area around the second crossing point 32.

In the present exemplary embodiment, as shown in fig. 1-3, the plurality of scores 21 may have a "king" shape, and it should be understood that in other exemplary embodiments, the plurality of scores 21 may have other shapes such as an "i" shape, an "X" shape, etc.

In the present exemplary embodiment, the battery case 1 may be a steel structure or an aluminum alloy structure. The steel structure and the aluminum alloy structure have better strength, so that the battery shell can protect the internal battery core and other structures. In addition, the steel structure and the aluminum alloy structure have a certain ductility, so that the battery case can be conveniently formed through a stamping process. The battery shell can be a single-layer shell or a multi-layer composite shell.

In the present exemplary embodiment, the score 21 may be a score 21 formed by a laser etching process. The laser etching process etches the pressure relief structure through laser to form the notch, and has the advantages of high precision, no contact, high flexibility, high speed and the like. It should be appreciated that in other exemplary embodiments, the score may also be formed by stamping.

In the present exemplary embodiment, the scores 21 may be provided at the bottom surface of the battery case 1. The bottom surface of the battery shell 1 is the bottom of the battery shell when the battery works normally. After the bottom surface of the battery is exploded through the pressure release structure, high-pressure gas is not easy to directly impact people and things around the battery. The main casing of the battery casing may form the bottom surface of the battery, and the cover plate of the battery casing may also form the bottom surface of the battery.

In the present exemplary embodiment, the battery may be a lithium ion battery, it being understood that in other exemplary embodiments, the battery may also be a cadmium nickel battery, a nickel hydrogen battery, a lithium polymer battery, or the like.

The battery is a minimum unit that includes an electric core and an electrolyte and is capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating the stacked portion. The battery cell comprises a positive plate and a negative plate and a diaphragm positioned in front of the positive plate and the negative plate. The positive plate in the battery cell comprises a positive current collector and a positive active material layer positioned on at least one side of the positive current collector, and the negative plate in the battery cell comprises a negative current collector and a negative active material layer positioned on at least one side of the negative current collector. For example, the positive active material of the lithium ion battery may be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, and the positive current collector may be aluminum foil. The negative electrode active material may be graphite, silicon, or the like, and the negative electrode current collector may be copper foil. During charging, lithium ions are separated from the positive electrode active material and move into the negative electrode active material through the electrolyte, and the lithium ions are inserted into interlayer gaps of the carbon material, so that the charging process of the battery is completed. During discharge, lithium ions are separated from the negative electrode active material and move into the positive electrode active material through the electrolyte, thereby completing the discharge process of the battery.

In this exemplary embodiment, the battery may also be a cylindrical battery, and the battery case of the cylindrical battery may include two circular end faces and a curved surface between the two circular end faces.

In other exemplary embodiments, the battery may be a prismatic battery, that is, the battery may be a quadrangular battery, where the quadrangular battery mainly refers to a prismatic shape, but it is not strictly limited whether each side of the prism is necessarily a strictly defined straight line, and corners between sides are not necessarily right angles, and may be arc transitions.

The battery can be a laminated battery, the laminated battery is convenient to group, and the battery with longer length can be obtained through processing. Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Or the battery can be a winding type battery, namely, a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a winding type battery cell.

The present exemplary embodiment also provides a battery device including a plurality of the above-described batteries. As shown in fig. 1 and 4, fig. 4 is a schematic structural view of an exemplary embodiment of a battery device of the present disclosure. The battery 100 includes: two large faces 13 and a plurality of small faces 14, wherein the two large faces 13 are oppositely arranged, and at least part of large faces 13 of adjacent batteries are oppositely arranged; the facet 14 is connected between two large faces, the area of the large face is larger than that of the facet 14, and the pressure relief structure 2 is arranged on the facet 14. Wherein the outer surface of the first sidewall 11 may form a facet. The battery device may further include: and the heat exchange assembly 4, wherein the heat exchange assembly 4 is arranged between the relatively large faces 13 of the adjacent batteries.

The heat exchange assembly 4 may be formed with a heat transfer passage in which a heat transfer medium may circulate to achieve heat exchange with the battery. In the present exemplary embodiment, the heat exchange assembly 4 may either cool the battery or heat the battery. For example, when the temperature of the battery is high, the heat exchange assembly 4 can cool the battery to improve the safety and stability of the battery pack; when the battery is used normally under extremely cold environment due to the fact that the temperature is too low, the heat exchange assembly 4 can heat the battery, so that the battery pack can adapt to more use environments.

In one aspect, the present exemplary embodiment provides the heat exchange assembly 4 between the large faces 13 of the cells, which may increase the heat exchange area between the cells and the heat exchange assembly 4, thereby increasing the rate of heat exchange between the cells and the heat exchange assembly 4. On the other hand, the present exemplary embodiment provides the pressure relief structure 2 on the facet 14, which can prevent the heat exchange assembly 4 from being affected by the high-temperature and high-pressure gas when the pressure relief structure 2 is exhausted.

As shown in fig. 4, the battery device further includes: battery case 5. Battery case 5 includes bottom plate 51, and pressure release structure 2 is provided on a side of battery 100 facing bottom plate 51. The bottom plate 51 is the bottom of the battery case 5 when it is operating normally. The bottom of the battery box 5 is generally arranged at one side away from the passenger cabin, so that the damage of high-pressure gas discharged by the pressure release structure 2 to people and objects in the passenger cabin can be reduced.

In the present exemplary embodiment, the battery device 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 fixed a plurality of batteries. The battery may be a cylindrical battery, and the cylindrical battery may be disposed on the support plate, thereby forming a battery module.

The battery pack comprises a plurality of batteries and a box body, wherein the box body is used 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 case. Wherein, a plurality of batteries can be installed in the box after forming the battery module. Or a plurality of batteries can be directly arranged in the box body, namely, the plurality of batteries do not need to be grouped, and the plurality of batteries are fixed by the box body.

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

The drawings in the present disclosure relate only to the structures to which the present disclosure relates, and other structures may be referred to in general. The embodiments of the present disclosure and features in the embodiments may be combined with each other to arrive at a new embodiment without conflict. It will be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the disclosed embodiments without departing from the spirit and scope of the disclosed embodiments, which are intended to be encompassed within the scope of the appended claims.

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

Claims

1. A battery, the battery comprising:

A battery case (1);

The pressure release structure (2) is arranged on the battery shell (1), and a plurality of scores (21) are formed on the pressure release structure (2);

wherein at least part of the scores (21) are intersected to form a cross points (3), the residual thickness of the pressure release structure (2) at the position of the scores (21) is d 1mm, and a/d1 is 0.01-0.1.

2. The battery of claim 1, wherein a is 5 or less.

3. A battery according to claim 1, characterized in that the distance between any of said crossing points (3) and the crossing point (3) closest thereto is 2-30 mm.

4. The battery according to claim 1, characterized in that a part of the structure of the battery housing (1) is multiplexed as the pressure relief structure (2).

5. The battery according to claim 4, characterized in that the battery case (1) comprises a first side wall (11), a part of the structure of the first side wall (11) being multiplexed into the pressure relief structure (2), the score (21) being formed on the outer surface of the first side wall (11);

The length of each notch (21) is L1 mm, the thickness of the first side wall (11) is d2 mm, and L1/d2 is 3-100.

6. The battery according to claim 4, characterized in that the battery housing (1) comprises a first side wall (11), a part of the structure of the first side wall (11) being multiplexed into the pressure relief structure (2);

The thickness of the first side wall (11) is d2 mm, and d1/d2 is 0.05-0.3.

7. The battery according to claim 4, characterized in that the battery housing (1) comprises a first side wall (11), a part of the structure of the first side wall (11) being multiplexed into the pressure relief structure (2);

A first center point is formed along the geometric center of the graph formed by the periphery of the first side wall (11), and the distance between the geometric center of at least one intersection point (3) and the first center point is less than or equal to 20 millimeters.

8. The battery according to claim 1, characterized in that the angle between the intersecting scores (21) is 70 ° -110 °.

9. The battery according to claim 1, wherein a plurality of the intersecting points (3) include: -a first intersection point (31), -a second intersection point (32), -a third intersection point (33), said first intersection point (31) and said third intersection point (33) being centrosymmetric with respect to said second intersection point (32).

10. The battery according to claim 9, characterized in that the residual thickness of the relief structure (2) at the location of the second intersection (32) is smaller than the residual thickness of the relief structure (2) at the location of the first intersection (31);

And/or the residual thickness of the pressure relief structure (2) at the position of the second intersection (32) is smaller than the residual thickness of the pressure relief structure (2) at the position of the third intersection (33).

11. The battery according to any one of claims 1 to 10, wherein the battery case (1) is of a steel structure or an aluminum alloy structure.

12. The battery according to any one of claims 1-10, wherein the score (21) is a score (21) formed by a laser etching process.

13. The battery according to any one of claims 1 to 10, wherein the score (21) is provided at the bottom surface of the battery case (1).

14. A battery device, characterized in that it comprises a plurality of batteries (100) according to any one of claims 1-13.

15. The battery device according to claim 14, wherein the battery (100) includes:

Two large faces (13) which are oppositely arranged and at least part of large faces of adjacent batteries are oppositely arranged;

A plurality of facets (14), wherein the facets (14) are connected between two large facets, the area of the large facets (13) is larger than that of the facets (14), and the pressure relief structure (2) is arranged on the facets (14);

The battery device further includes:

And the heat exchange assembly (4) is arranged between the relatively large faces of the adjacent batteries.

16. The battery device of claim 14, wherein the battery device further comprises:

The battery box body (5), the battery box body (5) includes bottom plate (51), pressure release structure (2) set up in battery (100) face one side of bottom plate (51).