CN218648052U

CN218648052U - Battery and electronic device

Info

Publication number: CN218648052U
Application number: CN202222966916.5U
Authority: CN
Inventors: 吴昌军; 陈卓烈; 崔鑫; 何亚飞
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Aesc Japan
Priority date: 2022-07-20
Filing date: 2022-11-08
Publication date: 2023-03-17
Anticipated expiration: 2032-11-08

Abstract

The invention discloses a battery and an electronic device. In the present invention, a battery includes: a housing having an opening; a cell disposed within the housing; and a cover plate covering the opening of the housing; the cover plate includes: the cover plate comprises a cover plate main body, wherein a first hole is formed in the cover plate main body; gao Wenpian, the high temperature resistant sheet is disposed on top of the cover plate main body and covers the first hole. Compared with the prior art, the battery has the advantages that the overall safety and stability of the battery are guaranteed, and the service life is further prolonged.

Description

Battery and electronic device

Technical Field

The present disclosure relates to battery technologies, and particularly to a battery and an electronic device.

Background

In recent years, the rapid rise of new energy automobiles brings great promotion effects on the sustainable development of society and the harmonious coexistence of human beings and the environment. Among various conceptual new energy vehicles, electric vehicles have been produced in large quantities technically, and are receiving more and more attention and favor with government support. As a solution to the energy and environmental problems, the key technology in electric vehicles is to replace the rechargeable battery pack used by gasoline-fueled engines as the power source.

The existing rechargeable battery assembly is internally provided with a plurality of batteries which are connected in a battery shell through a proper series-parallel connection structure, so that the design not only can meet the relatively high energy density requirement of the electric automobile, but also can flexibly adjust the series-parallel connection mode in the batteries according to different design requirements of various automobiles, and the practicability is high. However, when one battery in the battery assembly generates thermal runaway, the high-temperature substances sprayed by the battery can affect other batteries, so that other batteries are also led out to generate the thermal runaway, and further the thermal runaway of the whole battery assembly is caused, so that fire and other conditions are caused.

Disclosure of Invention

The invention aims to provide a battery and an electronic device, which ensure the overall safety and stability of the battery and further prolong the service life.

In order to solve the above technical problem, an embodiment of the present invention provides a battery including:

a housing having an opening;

a cell disposed within the housing; and

a cover plate covering the opening of the housing;

the cover plate includes:

the cover plate comprises a cover plate main body, a first hole and a second hole, wherein the cover plate main body is provided with the first hole;

gao Wenpian, the high temperature resistant sheet is arranged on the top of the cover plate main body and covers the first hole.

Compared with the prior art, the battery cover plate main body is also provided with the high-temperature resistant sheet, and the high-temperature resistant sheet covers the cover plate main body, so that high-temperature substances from other batteries can be prevented from entering the battery from the first hole. Therefore, the situation that under the condition that one battery is subjected to thermal runaway, other batteries are subjected to spread to generate linkage thermal runaway is avoided, and the probability of thermal runaway diffusion is reduced.

In one embodiment, the high temperature resistant sheet includes a weak portion, and an orthographic projection of the weak portion along a direction perpendicular to the cover plate main body is at least partially located in the first hole.

In one embodiment, the battery further comprises a protective layer, the protective layer covers one side of the high-temperature resistant sheet, which is far away from the cover plate main body, and the overlapping area of the protective layer and the one side of the high-temperature resistant sheet, which is far away from the cover plate main body, accounts for 50-100% of the area of the one side of the high-temperature resistant sheet, which is far away from the cover plate main body.

In one embodiment, the protective layer extends at least partially out of the high temperature resistant sheet and is connected to the cover main body.

In one embodiment, the length of the protective layer is greater than that of the high temperature resistant sheet, and two ends of the protective layer along the length direction of the high temperature resistant sheet extend to the outside of the high temperature resistant sheet and are connected with the cover plate main body;

and/or the width of the protective layer is larger than that of the high-temperature-resistant sheet, and the two ends of the protective layer along the width direction of the high-temperature-resistant sheet extend to the outside of the high-temperature-resistant sheet and are connected with the cover plate main body.

In one embodiment, the protective layer is a plastic film; the high temperature resistant sheet is a mica sheet or a glass sheet.

In one embodiment, the high temperature resistant sheet comprises a weak part, and an orthographic projection of the weak part along a direction perpendicular to the cover plate main body is at least partially positioned in the first hole;

and the protective layer is provided with a second hole, and the second hole is positioned on the weak part along the orthographic projection perpendicular to the direction of the cover plate main body.

In an embodiment, the battery includes a pole electrically connected to the battery cell and penetrating through the cover plate body, the high temperature resistant sheet, and the protective layer.

In one embodiment, the weakened portion comprises a crack or a plurality of holes, when the weakened portion is a plurality of linear structures, at least two of the linear structures intersect or extend to intersect.

In one embodiment, an orthogonal projection of an intersection point of two intersecting linear structures along a direction perpendicular to the main body of the cover plate is located on the first hole.

In one embodiment, the cover plate main body is further provided with a liquid injection hole; at least one of the linear structures is partially located above the liquid injection hole.

In one embodiment, the battery further includes an intermediate protective layer between the high temperature-resistant sheet and the cap plate main body, and the high temperature-resistant sheet is connected to the cap plate main body through the intermediate protective layer.

In one embodiment, the high temperature resistant sheet is an integral member.

In one embodiment, when the Gao Wenpian is separated from the cover plate body, the high temperature resistant sheet is a straight sheet.

In one embodiment, the cover plate body is provided with a boss surrounding the periphery of the first hole; the Gao Wenpian resistant part has a gap with the outer side wall of the boss.

In one embodiment, the distance from the intersection of the boss and the upper surface of the cover plate main body to the high temperature resistant sheet is 1mm to 2mm.

In one embodiment, the first hole is further covered with a protective film, and the high-temperature resistant sheet covers the protective film.

An embodiment of the present invention provides an electronic device including the battery as described above.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a battery according to an embodiment of the present invention;

fig. 3 is an exploded view of a battery according to an embodiment of the present invention;

FIG. 4 is an exploded view of a cover plate according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of another high temperature resistant sheet according to an embodiment of the present invention;

FIG. 6 is an exploded view of a cover body and a high temperature resistant sheet according to an embodiment of the present invention;

FIG. 7 is a partial cross-sectional view of the alternative closure body of FIG. 6 with a refractory patch attached thereto;

FIG. 8 is an exploded view of another cover plate according to an embodiment of the present invention;

FIG. 9 is an exploded view of yet another cover plate according to an embodiment of the present invention;

fig. 10 is a cross-sectional view of a battery according to an embodiment of the present invention;

FIG. 11 is an enlarged view of a portion of FIG. 10;

fig. 12 is an exploded view of another battery according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

The objects, features and advantages of the present invention will be more clearly understood from the following detailed description of various embodiments of the present invention taken in conjunction with the accompanying drawings. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms are used, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be interpreted as words of convenience and should not be interpreted as limiting terms.

An embodiment of the present invention is described below with reference to the drawings. An embodiment of the present invention provides an electronic device 300, as shown in fig. 1, the electronic device 300 may be an electric vehicle or an electric motorcycle, and the electronic device 300 includes a battery 100, and the number of the battery 100 may be 1 or more. Specific embodiments of the battery 100 are described in detail below with reference to the accompanying drawings.

In one embodiment, fig. 2 shows an assembly view of the battery 100, and fig. 3 shows an exploded view of the battery 100. As shown in fig. 2 and 3, the battery 100 includes a cap plate 1 and a case 2 having an upper opening 21. The cover plate 1 is disposed at the opening 21 of the case 2 and seals it. The cover plate 1 includes a cover plate main body 11 and a high temperature resistant sheet 12, and the shape of the cover plate main body 11 matches the shape of the opening 21 of the housing 2. Since the case 2 is shown as a rectangular box shape in the present embodiment, the cover main body 11 is adaptively formed in an elongated shape. It should be understood by those skilled in the art that when the case 2 of the battery is formed in other shapes, the shape of the cap main body 11 can be formed in other shapes accordingly as long as the cap main body 11 can seal the opening 21 of the case 2. A plurality of battery cells 3 are arranged in a sealed space formed by the shell 2 and the cover plate 1, and the battery cells 3 are closely arranged in the shell 2 and are electrically connected with each other to jointly form a charging and discharging assembly of the battery assembly.

When the case 2 has a rectangular box shape, openings may be provided at both ends in the longitudinal direction, and in this case, the cover plate 1 may cover the openings at both ends.

As shown in fig. 3 and 4, a first hole 111 is opened in the cover main body 11, the explosion-proof valve 4 is attached to the first hole 111, and the explosion-proof valve 4 may have a sheet structure attached to the first hole 111. Two pole holes 113 are further formed in the cover plate main body 11, the positive pole 5 and the negative pole 6 respectively penetrate through one of the pole holes 113 and are arranged on the cover plate 1 in a protruding mode, and the positive pole 5 and the negative pole 6 are electrically connected with the battery cell 3 inside the shell 2. In the present embodiment, the first hole 111 is disposed at the center of the cover plate body 11 in the length direction, and the pole holes 113 are symmetrically disposed at two sides of the first hole 111 and respectively close to two ends of the cover plate 1 in the length direction. The first hole 111 is formed in an elongated shape having circular arcs at both ends, and the pole hole 113 is formed in a substantially rectangular shape. However, this is merely an example, and those skilled in the art can arbitrarily adjust the relative arrangement relationship, shape and size of the first hole and the post-disposing hole 113 according to actual needs. The high temperature resistant sheet 12 is provided on the upper surface of the cover plate body 11. The high temperature resistant sheet 12 has substantially the same shape as the cover plate body 11, and is bonded and fixed to the cover plate body 11. The high temperature resistant sheet 12 may be a mica sheet, a ceramic sheet, a glass sheet, or the like. The material of the high temperature resistant sheet comprises one of glass fiber, mica, ceramic and ceramic rubber. Preferably, the refractory sheet 12 has a thickness of 0.2mm to 1mm and can withstand up to 1000 degrees celsius.

Preferably, as shown in fig. 4, the high temperature resistant sheet 12 extends toward the second hole 113, and the high temperature resistant sheet 12 has a through-hole 1231 for the positive electrode tab 5 and the negative electrode tab 6 to pass through. In some embodiments, the high temperature resistant sheet 12 may not be penetrated by the positive post 56 or the negative post 6, i.e., the length of the high temperature resistant sheet 12 is shorter than the positive post 56 or the negative post 6.

When thermal runaway occurs in one of the plurality of cells, the high-temperature substance generated inside the cell splashes out of the first hole 111 and may break through the weak portion of the high-temperature-resistant sheet 12. However, since the cover plate 1 of the battery is further provided with the high temperature resistant sheet 12 to cover the cover plate body 11, the high temperature substance is prevented from directly contacting the cover plate 11, so that the structure of the cover plate 11 is not damaged. And the high-temperature resistant sheet 12 also covers the first hole 111, so that high-temperature substances can be prevented from entering the battery from the first hole 111, and the probability of thermal runaway diffusion is reduced. That is to say, by arranging the cover plate in the invention, the probability of chain diffusion of thermal runaway can be further reduced while the normal operation of the original explosion-proof mechanism is ensured, so that the possibility of explosion or fire of the whole battery is reduced, and the safety of the battery is improved.

Alternatively, as shown in fig. 4, when the high temperature-resistant sheet 12 is separated from the cover plate main body 11, the high temperature-resistant sheet 12 is a flat sheet. The thickness range of the high temperature resistant sheet 12 is 0.1 mm-1 mm, and the high temperature resistant sheet 12 is thin, so that the high temperature resistant sheet 12 can have certain elasticity or deformation force, and the high temperature resistant sheet 12 can not be broken even if being deformed after being attached to the cover plate main body 11. It can be understood that the high temperature resistant sheet 12 is attached to the cover plate main body 11 and is removed to have a micro-deformation, and it can be understood that the high temperature resistant sheet 12 is a straight plate in an original state. Preferably, the high temperature resistant sheet 12 may be an integral member, i.e., an integrally formed sheet plate.

Further, the high temperature-resistant sheet 12 has a weak portion, and an orthogonal projection of the weak portion in a direction perpendicular to the cover main body 11 is located at least partially in the first hole 111. The weak portion includes two intersecting linear structures, and an orthogonal projection of an intersection of the two linear structures in a direction perpendicular to the cover main body 11 is located at the center of the first hole 111. The line-type structure formed by the arrangement of the plurality of holes 1211 is shown in fig. 4, but is not limited thereto. In other embodiments, such as the high temperature resistant sheet of FIG. 5, the weakened portion may also be a linear fracture 1212. It will be understood by those skilled in the art that the shape of the weakened portion is not limited to the above-listed shape, but may be other shapes as long as the rupture easily occurs when the air pressure is increased. More specifically, the weak portion is preferably a structure that causes damage to the high temperature-resistant sheet 12 in a range of 1/4 to 3/4 of the thickness thereof. The line-shaped structure may be a straight line or a curved line, and the intersection point of the line-shaped structures may not be located at the center of the first hole 111. And the number of strips is not limited to the two shown. In other embodiments, the weakened portion may be a single linear structure, or may be three or more linear structures. When there are more than two linear structures, the linear structures may also be parallel to each other or intersect on an extended line.

Because the weak part of the high temperature resistant sheet 12 is located above the first hole 111, the weak part can be broken under the condition that high temperature and high pressure are generated in the battery, a channel for discharging the high temperature and high pressure in the battery to the outside is formed, and explosion and fire of the battery are prevented. That is, the high temperature resistant sheet 12 of the present invention can prevent a chain reaction caused by the thermal runaway of other batteries while ensuring that the original pressure relief function of the explosion-proof valve of one battery and the first hole 111 normally functions. The safety and stability of the battery as a whole are improved.

Further, the lid main body 11 is provided with a liquid injection hole 114. FIG. 6 is an exploded view of another temperature-resistant sheet and cover plate body, in FIG. 6, the weak portion is partially above the liquid injection hole 114; FIG. 7 is a partial sectional view of the lid main body and the high temperature-resistant sheet of FIG. 6 attached together, and FIG. 7 shows that the weak part of the high temperature-resistant sheet 12 is located above the pour hole 114, i.e., the hole 1211 is located above the pour hole 114. That is, one of the two intersecting linear structures extends above the pour hole 114 and is at least partially positioned above the pour hole 114, so that helium detection can be performed after the refractory plate 12 is installed. In some embodiments, the non-intersecting line-shaped structures may also extend above the pour hole.

In addition, in other embodiments, the end points of the two linear structures extend to the width-direction edge of the high temperature resistant sheet. The distance from the end point of the linear structure to the edge of the high-temperature resistant sheet in the width direction is less than or equal to 5mm, and the distance from the end point of the linear structure to the width direction of the high-temperature resistant sheet, namely the width direction of the cover plate main body 11. It will be understood by those skilled in the art that the end points of the two linear structures may not be as close to the widthwise edges of the high temperature resistant sheet. It will be appreciated that the weakened portions may be a plurality of linear structures, not limited to 2, all of which may be spaced apart, or some of which may be spaced apart.

Further, as shown in fig. 3 and 4, the battery 100 further includes a protective layer 7. The protective layer 7 is a thin film having the same shape and substantially the same area as the upper surface of the high temperature resistant sheet 12, and is adhered to the upper surface of the high temperature resistant sheet 12.

In some embodiments, the overlapping area of the protective layer 7 and the side of the refractory sheet 12 facing away from the cover plate main body 11 accounts for 50% to 100% of the area of the side of the refractory sheet 12 facing away from the cover plate main body 11. The overlapping area of the sheath 7 with the side of the refractory sheet 12 facing away from the main body 11 of the cap plate in fig. 3 and 4 accounts for 100% of the area of the side of the refractory sheet 12 facing away from the main body 11 of the cap plate. Optionally, the overlapping area of the protective layer 7 and the side of the high temperature resistant sheet 12 facing away from the cover plate main body 11 accounts for 55%, 60%, 70%, 75%, 80%, 90%, or the like of the area of the side of the high temperature resistant sheet 12 facing away from the cover plate main body 11. In other embodiments, the protective layer may cover the high temperature resistant sheet 12, that is, the side of the high temperature resistant sheet 12 facing the cover main body, the side facing away from the cover main body 11, and the side of the high temperature resistant sheet 12 are all covered by the protective layer 7. It will be appreciated that the protective layer 7 may also be applied to the side of the refractory sheet 12 facing the cover body and to the side facing away from the cover body 11.

In addition, the length of the protective layer 7 is greater than that of the high temperature resistant sheet 12, and two ends of the protective layer 7 along the length direction of the high temperature resistant sheet 12 extend to the outside of the high temperature resistant sheet 12 to be connected with the cover plate main body. Specifically, the length of the high temperature resistant sheet 12 can be smaller than that of the cover plate main body, the protective layer 7 extends to the outside of the high temperature resistant sheet 12 and is attached to the upper surface of the cover plate main body 11, and the protective layer 7 can also extend out to be attached to the side wall of the cover plate main body. Of course, the protective layer 7 may extend in the width direction of the cover main body 11 to be connected to the cover main body 11. That is, for better fixation of the protective layer 7, the protective layer extends at least partially outside the high temperature resistant sheet and is connected to the cover main body.

Further, as shown in fig. 2 and 3, the positive electrode tab 5 and the negative electrode tab 6 each penetrate the cover plate body 11, the high temperature resistant sheet 12, and the protective layer 7. In other embodiments, one of the positive electrode tab 5 and the negative electrode tab 6 penetrates the cap plate body 11, the high temperature-resistant sheet 12, and the protective layer 7.

Further, in another embodiment, as shown in fig. 8, a second hole 71 is formed in the protection layer 7, and an orthogonal projection of the second hole 71 along a direction perpendicular to the main body of the cover plate is located on the weak portion. Specifically, when the weak portion is a hole, the second hole 71 may also be a hole as well; when the weakened portion is a fracture, the second hole may also be a fracture as well. It will be appreciated by those skilled in the art that the second aperture may also be configured differently than the weakened portion. In this example, the protective layer 7 is free of second holes.

In some embodiments, as shown in fig. 9, a protective layer 8 may also be disposed between the high temperature resistant sheet 12 and the cover main body 11, the protective layer 8 is also referred to as an intermediate protective layer, and the high temperature resistant sheet 12 is connected to the cover main body 11 through the protective layer 8. The protective layer 8 may be constructed similarly to the protective layer 7 and will not be described in detail here.

Optionally, the

protective layers

7 and 8 are plastic films, and when the weak portion of the high temperature resistant sheet 12 is broken through, the

protective layers

7 and 8 are broken through by internal pressure, so that the breaking function is not affected.

Further, in the present embodiment, as shown in fig. 6, the cover main body 11 is provided with a boss 112 around the outer periphery of the first hole 111. Specifically, as shown in fig. 10 and 11, after the high temperature resistant sheet 12 is covered on the cover plate main body 11, the boss 112 will abut against the high temperature resistant sheet 12, so that the high temperature resistant sheet 12 partially protrudes, and a gap 1121 is formed between the high temperature resistant sheet 12 and the outer sidewall 1120 of the boss 112. And in some embodiments, the cover plate body 11 may have no bosses, and the high temperature resistant sheet 12 may be applied to more types of cover plate bodies 11.

When the boss 112 exists, the high temperature resistant sheet 12 in the initial state of the flat sheet is mounted on the cover plate main body 11, and the high temperature resistant sheet 12 can be better matched with the cover plate main body, so that the inconvenience in mounting due to the existence of the boss is avoided.

Further, as shown in fig. 11, the distance between the boss 112 and the high temperature-resistant sheet 12 at the interface of the upper surface of the cover plate body 11 is 1mm to 2mm. Alternatively, the distance of the high temperature resistant sheet 12 at the intersection of the boss 112 and the upper surface of the cover plate body 11 may be 1.2mm, 1.4mm, 1.6mm, or 1.8mm.

Further, as shown in fig. 12, the cover plate 1 further includes: the protective film 13 is covered on the first hole 111, and the high temperature-resistant sheet 12 covers the protective film 13. The protective film 13 forms further protection on the first hole 111, and normal explosion prevention and pressure relief of the battery cannot be interfered. The protective film 13 may be a plastic film, a silicone mold, or the like. In some embodiments, the protective film may also be absent.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. A battery, comprising:

a housing having an opening;

a cell disposed within the housing; and

a cover plate covering the opening of the housing;

the cover plate includes:

the cover plate comprises a cover plate main body, wherein a first hole is formed in the cover plate main body;

gao Wenpian, the high temperature resistant sheet is disposed on top of the cover plate main body and covers the first hole.

2. The battery of claim 1, wherein the high temperature resistant sheet includes a weakened portion at least partially located within the first aperture along an orthographic projection perpendicular to the main body of the cap plate.

3. The battery according to claim 1, further comprising a protective layer covering a side of the high-temperature-resistant sheet facing away from the cap plate main body, an overlapping area of the protective layer and the side of the high-temperature-resistant sheet facing away from the cap plate main body occupying 50% to 100% of an area of the side of the high-temperature-resistant sheet facing away from the cap plate main body.

4. The battery of claim 3, wherein the protective layer extends at least partially beyond the high temperature resistant sheet and is connected to the cover plate body.

5. The battery according to claim 3, wherein the length of the protective layer is greater than that of the high temperature resistant sheet, and two ends of the protective layer along the length direction of the high temperature resistant sheet extend to the outside of the high temperature resistant sheet and are connected with the cover plate main body;

6. The battery of claim 3, wherein the protective layer is a plastic film; the high temperature resistant sheet is a mica sheet or a glass sheet.

7. The battery of claim 3, wherein the high temperature resistant sheet includes a weak portion at least partially located within the first aperture along an orthographic projection perpendicular to the main body of the cap plate;

8. The battery of claim 3, comprising a post electrically connected to the cell and extending through the cover body, the high temperature resistant sheet, and the protective layer.

9. The battery of claim 2, wherein the weakened portion comprises a crack or a plurality of holes when the weakened portion has a plurality of linear structures, wherein at least two of the linear structures intersect or extend to intersect.

10. The battery of claim 9, wherein an intersection of two of the line-type structures that intersect is located on the first aperture along an orthogonal projection perpendicular to the direction of the cap plate body.

11. The battery of claim 9, wherein the cover plate body is further provided with a liquid injection hole; at least one of the linear structures is partially located above the liquid injection hole.

12. The battery of claim 1, further comprising an intermediate protective layer between the high temperature resistant sheet and the cap plate body, the high temperature resistant sheet being connected to the cap plate body through the intermediate protective layer.

13. The battery according to claim 1, wherein the high temperature-resistant sheet is an integrated member.

14. The battery of claim 1, wherein the high temperature resistant sheet is a flat sheet when the Gao Wenpian is separated from the cap plate body.

15. The battery according to claim 1, wherein the cap body is provided with a boss around the outer circumference of the first hole; the Gao Wenpian resistant part has a gap with the outer side wall of the boss.

16. The battery of claim 15, wherein the distance from the intersection of the boss and the upper surface of the cap plate body to the high temperature resistant sheet is 1mm to 2mm.

17. The battery of claim 1, wherein the first hole is further covered with a protective film, and the high temperature resistant sheet covers the protective film.

18. An electronic device comprising the battery according to claim 1.