CN214043807U

CN214043807U - Cover plate and battery

Info

Publication number: CN214043807U
Application number: CN202022901306.8U
Authority: CN
Inventors: 罗在锋; 孙飞; 苑丁丁
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-08-24
Anticipated expiration: 2030-12-03

Abstract

The utility model relates to a battery technology field specifically discloses an apron and battery. The utility model discloses an apron is including relative first end and the second end that sets up, and first end setting is in the accent of the shell of battery, and the second end is used for the accent of shutoff shell, is provided with the pressure relief groove between first end and the accent, and the pressure relief groove caves in the surface of first end. The utility model discloses a fixed connection with the shell can be guaranteed to the apron, when having high-pressure gas or high-pressure liquid in the shell, can let out high-pressure gas or high-pressure liquid from the shell is inside through pressure relief groove, can avoid the battery explosion, also do not destroy the shape of apron and shell for the battery can continue to use increase of service life.

Description

Cover plate and battery

Technical Field

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

Background

In the process of using the battery, for example, the lithium battery can cause adverse reaction inside the battery cell due to the temperature change of the external environment sometimes, so that the internal pressure of the battery cell rises, gas or liquid expands, even explodes in severe cases, and great potential safety hazards exist, so that an explosion-proof sheet or an explosion-proof valve can be arranged on the existing lithium battery to ensure the use safety of the lithium battery.

But the explosion-proof piece is mostly only covered on lithium cell apron through one deck thin slice, when lithium cell internal pressure risees the explosion-proof piece and breaks, the explosion-proof piece can produce the piece flying speed and outwards spill, and its piece falls to mechanical parts inside easily and causes the clearance inconvenient. The area of the explosion-proof valve is relatively small compared with that of the lithium battery cover plate, and when the area of the cover plate is small, the pressure relief capacity of the explosion-proof valve can be almost ignored.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide an apron, it can avoid the battery explosion, does not also destroy the shape of apron and shell, and the pressure release ability is high.

Another object of the embodiment of the present invention is to provide a battery, which has high safety and long service life.

To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, a cover plate is provided, which includes a first end and a second end disposed oppositely, the first end is disposed in a cavity of a housing of a battery, the second end is used for blocking the cavity of the housing, a pressure relief groove is disposed between the first end and the cavity, and the pressure relief groove is recessed in a surface of the first end.

As a preferable scheme of the cover plate, the number of the pressure relief grooves is at least two, and each pressure relief groove is uniformly arranged between the first end and the cavity opening.

As a preferable scheme of the cover plate, the ratio of the groove width of each pressure relief groove on the surface of the first end is A, and A is more than or equal to 10% and less than or equal to 15%.

As a preferable scheme of the cover plate, a temperature-sensitive color-changing material layer is arranged on the surface of the second end.

As a preferable scheme of the cover plate, the temperature sensing value of the temperature sensing color changing material layer is T, and T is more than or equal to 60 ℃.

As a preferable mode of the cover plate, a groove bottom surface of the pressure relief groove is arranged at an angle with an outer side wall surface of the first end.

As a preferable scheme of the cover plate, a flange is arranged on the second end, and the flange protrudes from the outer side wall surface of the first end.

Preferably, the flange protrudes from the outer side wall surface of the housing.

As a preferable scheme of the cover plate, an explosion-proof valve is further arranged on the cover plate.

In a second aspect, a battery is provided, which includes an energy storage cabinet main body, and the cover plate, wherein a first end of the cover plate is disposed in the cavity of the housing, and a second end of the cover plate is used for sealing the cavity of the housing.

The utility model discloses beneficial effect does:

the cover plate is formed by the first end and the second end which are arranged oppositely, wherein the first end is arranged in the cavity of the shell of the battery, the second end is used for plugging the cavity of the shell, the cover plate can be fixedly connected with the shell, and the battery cell in the shell can be prevented from being exposed outside the shell. In addition, be provided with pressure relief groove between first end and the accent, pressure relief groove caves in the surface of first end, and pressure relief groove can reduce the joint strength between apron and the shell, and when gas or liquid inflation appear because of pressure risees in the shell, high-pressure gas or high-pressure liquid can act on pressure relief groove and push away partial apron from the shell for the outside and the inside intercommunication of shell to the inside pressure release of shell. The utility model discloses the apron can guarantee with the fixed connection of shell, when having high-pressure gas or high-pressure liquid in the shell, can let out high-pressure gas or high-pressure liquid from the shell is inside through pressure relief groove, can avoid the battery explosion, also does not destroy the shape of apron and shell for the battery can continue to use increase of service life.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is an exploded schematic view of a cover plate and a housing according to an embodiment of the present invention.

Fig. 2 is a schematic top view of a cover plate according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a side view of a cover plate according to an embodiment of the present invention.

Fig. 4 is a side view partially showing a cross-sectional structure of a battery according to an embodiment of the present invention.

Fig. 5 is a schematic side view of a partial structure of a battery according to an embodiment of the present invention.

In the figure:

1. a cover plate; 11. a first end; 12. a second end; 121. a flange; 13. a pressure relief groove; 14. a temperature-sensitive color-changing material layer; 15. an explosion-proof valve; 2. a housing; 21. a lumen port.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, an embodiment of the present invention provides a cover plate 1, including a first end 11 and a second end 12 that are disposed oppositely, the first end 11 is disposed in a cavity 21 of a housing 2 of a battery, the second end 12 is used for plugging the cavity 21 of the housing 2, a pressure relief groove 13 is disposed between the first end 11 and the cavity 21, and the pressure relief groove 13 is recessed in a surface of the first end 11.

The embodiment of the utility model provides a first end 11 and second end 12 through relative setting form apron 1, and wherein, first end 11 sets up in the accent 21 of the shell 2 of battery, and second end 12 is used for the accent 21 of shutoff shell 2, can be with apron 1 and shell 2 fixed connection, also can avoid the electric core in the shell 2 to expose outside shell 2. In addition, a pressure relief groove 13 is arranged between the first end 11 and the cavity opening 21, the pressure relief groove 13 is recessed in the surface of the first end 11, the pressure relief groove 13 can reduce the connection strength between the cover plate 1 and the housing 2, and when gas or liquid expands due to pressure rise in the housing 2, high-pressure gas or high-pressure liquid can act on the pressure relief groove 13 and push part of the cover plate 1 away from the housing 2, so that the outside and the inside of the housing 2 are communicated, and the inside of the housing 2 is relieved. The utility model discloses the fixed connection with shell 2 can be guaranteed to apron 1, when having high-pressure gas or high-pressure liquid in shell 2, can let out high-pressure gas or high-pressure liquid from shell 2 inside through pressure relief groove 13, can avoid the battery explosion, also do not destroy the shape of apron 1 and shell 2 for the battery can continue to use increase of service life.

In one embodiment, referring to fig. 2, the number of the pressure relief grooves 13 is at least two, and each pressure relief groove 13 is uniformly arranged between the first end 11 and the cavity opening 21, so that high-pressure gas or high-pressure liquid can be uniformly discharged from each position of the cavity opening 21 of the housing 2, and the pressure relief efficiency is further improved.

Preferably, the ratio of the groove width of each pressure relief groove 13 on the surface of the first end 11 is A, 10% to A15%.

In another embodiment, referring to fig. 3, a temperature-sensitive color-changing material layer 14 is disposed on the surface of the second end 12, and the temperature-sensitive color-changing material is prepared from an electron-transfer organic compound system, which is a type of organic color-emitting system with a special chemical structure, and the molecular structure of the organic material is changed by electron transfer at a specific temperature, so as to realize color conversion. This embodiment is through setting up temperature sensing color-changing material layer 14 on apron 1, and when electric core or electrolyte in shell 2 produced high temperature and reached specific temperature, temperature sensing color-changing material layer 14 on the apron 1 can change the colour to remind the user of battery this battery to have the temperature anomaly, need change or overhaul, avoid the high temperature anomaly of single battery to influence all batteries.

More preferably, the temperature value sensed by the thermochromic material layer 14 is T, that is, the specific temperature T at which the thermochromic material can change color is T ≧ 60 ℃, and a user of the battery can be notified in time when the temperature of the cover plate 1 reaches above 60 ℃.

In particular, referring to fig. 1 and 3, the bottom surface of the pressure relief groove 13 is disposed at an angle with the outer sidewall surface of the first end 11, so that high-pressure gas or high-pressure liquid can be guided by the bottom surface of the pressure relief groove 13 to between the first end 11 and the cavity opening 21 of the housing 2, and the high-pressure gas or high-pressure liquid can be directly relieved through the pressure relief groove 13 when the cover plate 1 is lifted off, thereby increasing the pressure relief rate.

Optionally, referring to fig. 3, a flange 121 is disposed on the second end 12, the flange 121 protrudes from the outer sidewall surface of the first end 11, and the flange 121 can abut against the cavity 21 of the housing 2 to limit the connection between the cover plate 1 and the housing 2, so as to prevent the cover plate 1 from falling into the housing 2.

Furthermore, referring to fig. 4, the flange 121 protrudes from the outer sidewall surface of the housing 2, so that the cover plate 1 is further prevented from falling into the housing 2, and meanwhile, the flange 121 can preferentially bear external impact, so as to reduce the impact force on the housing 2 and prevent the electric core in the housing 2 from being damaged. Moreover, the flange 121 can facilitate the clamping of hands or instruments, and the assembly efficiency of the cover plate 1 and the shell 2 is improved.

In other preferred embodiments, the side wall of the first end 11 close to the cavity 21 is annularly provided with a chamfer structure or a fillet structure, the chamfer structure and the fillet structure can reduce the end area of the first end 11, and when the first end 11 is assembled in the cavity 21 of the housing 2, the first end 11 can be guided to approach the inside of the housing 2, so that the assembling difficulty of the cover plate 1 and the housing 2 is reduced.

In particular, referring to fig. 1, the shape of the end surface of the first end 11 and the shape of the cavity 21 of the housing 2 are circular, and the circular shape is a pattern with central symmetry and mirror symmetry, so that the cover plate 1 and the housing 2 can be installed at any relative angle, and the installation difficulty is reduced.

Optionally, referring to fig. 2, an explosion-proof valve 15 is further disposed on the cover plate 1, and the explosion-proof valve 15 can release pressure preferentially, so that daily pressure release requirements are met. When the pressure relief capacity of the explosion-proof valve 15 is insufficient or the pressure relief of the explosion-proof valve 15 fails, the pressure is relieved through the pressure relief groove 13 on the cover plate 1, so that the secondary protection effect can be achieved,

referring to fig. 1 and 5, the embodiment of the present invention further provides a battery, which includes a housing 2, and the cover plate 1 of any one of the above embodiments, wherein the first end 11 of the cover plate 1 is disposed in the cavity 21 of the housing 2, and the second end 12 of the cover plate 1 is used for plugging the cavity 21 of the housing 2. The cover plate 1 in this embodiment may have the same structure and achieve the same effect as the cover plate 1 in the above embodiments, and details are not described in this embodiment.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in a descriptive sense or positional relationship based on the orientation or positional relationship shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The cover plate is characterized by comprising a first end and a second end which are oppositely arranged, wherein the first end is arranged in a cavity opening of a shell of a battery, the second end is used for plugging the cavity opening of the shell, a pressure relief groove is arranged between the first end and the cavity opening, and the pressure relief groove is sunken in the surface of the first end.

2. The cover plate of claim 1, wherein the number of the pressure relief grooves is at least two, and each pressure relief groove is uniformly disposed between the first end and the cavity opening.

3. The decking of claim 2, wherein the groove width of each of the stress relief grooves is a, 10% to 15% of the surface of the first end.

4. The decking of claim 1, wherein a surface of the second end is provided with a layer of temperature-sensitive color-changing material.

5. The cover plate according to claim 4, wherein the temperature-sensitive color-changing material layer has a temperature T, T ≧ 60 ℃.

6. The decking of claim 1, wherein the channel floor of the relief channel is disposed at an angle to the outer side wall surface of the first end.

7. The decking of claim 1, wherein the second end has a flange disposed thereon that projects above an outer side wall surface of the first end.

8. The cover plate as claimed in claim 7, wherein the flange protrudes from an outer sidewall surface of the housing.

9. The cover plate according to any one of claims 1 to 8, wherein an explosion-proof valve is further provided on the cover plate.

10. A battery comprising a housing and a cover plate according to any one of claims 1 to 9, a first end of the cover plate being disposed in a cavity of the housing and a second end of the cover plate being adapted to close off the cavity of the housing.