CN218414922U

CN218414922U - Safety mechanism, battery case and battery

Info

Publication number: CN218414922U
Application number: CN202221340499.7U
Authority: CN
Inventors: 刘毅; 雷政军; 席彪
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2023-01-31
Anticipated expiration: 2032-05-31

Abstract

The utility model discloses a safety mechanism, battery shell, battery, safety mechanism includes sealing, spacing portion, installation department, the sealing is used for sealing battery exhaust passage, the sealing is including sealing the sealed dish of exhaust passage, spacing portion is used for restricting the home range of sealing, spacing portion has the gas vent; the mounting part is hollow and is fixedly arranged on the exhaust channel, and the limiting part is fixedly arranged at one end of the mounting part; during the first state, sealed battery exhaust passage is sealed to sealed dish, during the second state, sealed dish jack-up exhaust or pressure release, the back sealing part resets. The utility model discloses simple structure, simple to operate, it is safe high-efficient.

Description

Safety mechanism, battery case and battery

Technical Field

The application relates to the technical field of batteries, in particular to a safety mechanism, a battery shell and a battery.

Background

At present, most hard shell power batteries are provided with a safety explosion venting device, so that the problem that the internal pressure of the battery is released under an extreme condition is solved. The establishment and the implementation of relevant laws and standards of the rupture disk provide a basis for scientifically and reasonably designing, manufacturing and using the rupture disk.

CN215933763U discloses a pressure relief valve, comprising a valve body having a first end and a second end and a through hole extending between and through the first end and the second end; the valve comprises a breathable film connected with the first end of the valve body, and a valve cover with a fluid channel and covering the breathable film, wherein the valve body comprises a flange structure which is positioned between the first end and the second end and extends out in the circumferential direction.

CN213546508U discloses a relief valve and battery package, the relief valve includes: the mounting body can be arranged at the pressure relief opening and is provided with an exhaust channel communicated with the pressure relief opening; the cover plate assembly comprises a cover plate which is arranged on the exhaust channel and is far away from the exhaust port in an openable and closable manner, and the cover plate is in a covering state capable of covering the exhaust port and in an opening state capable of being opened when the pressure in the exhaust port is larger than a preset value; and the exhaust mechanism is arranged in the exhaust channel and can promote the gas in the pressure relief port to be exhausted.

CN213278312U discloses a pressure release valve of battery pack, which comprises: lower casing, upper housing and valve body. The lower case is mounted on the outer case of the battery pack. The upper shell is arranged on the lower shell, and the upper shell and the lower shell form a valve inner space. The valve body is arranged on the lower shell, the valve body is in sealing contact with the lower shell and divides the space in the valve into an inner space and an outer space, the valve body comprises an installation support, an elastic part and a breathable film, the installation support is connected with the elastic part into a whole, the installation support is arranged on the lower shell, the elastic part surrounds the breathable film to surround the breathable film in a central region, the elastic part is arranged in a peripheral region, and the elastic part is in sealing contact with the inner side wall of the lower shell in an interference fit mode. The inner side space is communicated with the inside of the battery pack, the outer side space is communicated with the outside, the pressure inside the battery pack and the external pressure are subjected to pressure balance through the breathable film, or the elastic part deforms and is separated from the inner side wall of the lower shell to form the pressure relief channel to quickly balance the pressure.

However, the explosion venting valve disclosed in the above patent is not reusable and has poor use effect.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a safety mechanism for battery exhaust, which includes a sealing portion, a stopper portion, and a mounting portion,

the sealing portion to seal a cell exhaust passage, the sealing portion including a sealing disk to seal the exhaust passage,

the limiting part is used for limiting the moving range of the sealing part and is provided with an exhaust port;

the mounting part is hollow and is fixedly arranged on the exhaust channel, and the limiting part is fixedly arranged at one end of the mounting part;

in a first state, the sealing disk seals the cell vent passage,

and in the second state, the sealing disc jacks up to exhaust or release the air, and the sealing part resets after the air is exhausted or released.

Preferably, be provided with magnetism on the sealed dish and inhale the body, just the corresponding portion of inhaling that is provided with of installation department makes sealed dish seals battery exhaust passage.

Preferably, the sealing disc is provided with a limiting rod, the limiting part is provided with a limiting hole, and the limiting rod can be embedded into the limiting hole.

Preferably, the mounting portion includes a stepped bearing platform to bear the sealing disc.

Preferably, the sealing disc and/or the mounting portion is provided with a sealing gasket.

Preferably, the mounting portion is provided with a sealing groove to accommodate the sealing gasket.

Preferably, the mounting portion includes an internal thread/an external thread, and is fixedly mounted with the battery case.

Preferably, the safety mechanism is further provided with a gas collecting hood fixedly arranged outside the limiting part and sealing the exhaust port.

In order to solve the technical problem, a battery shell is provided, which comprises the safety mechanism.

In order to solve the technical problem, a battery is provided, which comprises the casing.

The utility model has the advantages that: through set up safety mechanism on battery case, this safety mechanism sets up on the gas vent of battery or let out the mouth of exploding, when the battery takes place thermal runaway or produces unnecessary gas, the exhaust gas simple and convenient rapidly of usable this safety mechanism, be unlikely to harm battery case or the safety of battery itself, and this safety mechanism can used repeatedly, accomplish the back at the exhaust, sealed dish resets to sealed exhaust passage on the gas vent, can also inseparabler sealed exhaust passage after setting up magnetic suction body and corresponding magnetic suction portion, and is convenient and simple, safety and high efficiency.

Drawings

FIG. 1 is a schematic illustration of a first state of a safety mechanism in one embodiment;

FIG. 2 is a schematic view of a second state of the safety mechanism in one embodiment;

FIG. 3 is a schematic view of a seal portion in one embodiment;

FIG. 4 is a schematic view of another embodiment of a position limiting portion;

FIG. 5 is a schematic view of a safety mechanism in one embodiment;

fig. 6 is a schematic view of a battery case in one embodiment.

Reference numerals:

11-seal part

12-position limiting part

13-mounting part

14-gas collecting channel

111-sealing disk

112-limiting rod

113-sealing gasket

121-limiting hole

131-seal groove

100-cell case

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Hereinafter, the safety mechanism, the battery case, and the battery according to the present application are specifically disclosed in detail with reference to the drawings as appropriate. But a detailed description thereof will be omitted. For example, detailed descriptions of already known matters and repetitive descriptions of actually the same configurations may be omitted. This is to avoid unnecessarily obscuring the following description, and to facilitate understanding by those skilled in the art. The drawings and the following description are provided for those skilled in the art to fully understand the present application, and are not intended to limit the subject matter recited in the claims.

All embodiments and alternative embodiments of the present application may be combined with each other to form new solutions, if not specifically stated. All technical and optional features of the present application may be combined with each other to form new solutions, if not otherwise specified.

The terms "comprises" and "comprising" as used herein mean either open or closed unless otherwise specified. For example, "comprising" and "comprises" may mean that other components not listed may also be included or included, or that only listed components may be included or included.

It is understood that relational terms such as "first," "second," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above summary of the present application is not intended to describe each disclosed embodiment or every implementation of the present application. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is merely a representative group and should not be construed as exhaustive.

Example 1

As shown in fig. 1 to 5, a safety mechanism 1 for battery evacuation includes a sealing portion 11, a stopper portion 12, and a mounting portion 13, the sealing portion 11 being for sealing a battery evacuation passage, the sealing portion 11 including a sealing disk 111 for sealing the battery evacuation passage, the stopper portion 12 being for restricting a movable range of the sealing portion 11, the stopper portion 12 having an evacuation port 121; the mounting part 13 is hollow and is fixedly arranged on the exhaust passage, and the limiting part 12 is fixedly arranged at one end of the mounting part 13; in the first state, the seal disk 111 seals the cell exhaust passage, and in the second state, the seal portion 12 is reset after the seal disk 111 ejects exhaust or releases pressure.

In some embodiments, a magnetic attraction is provided on the sealing disk 111 and the mounting portion 13 is correspondingly provided with a magnetic attraction such that the sealing disk seals the cell exhaust passage. When the sealed dish is circular, can follow sealed dish border and set up annular magnetism and inhale the body, installation department 13 also is provided with corresponding magnetism and inhales the portion, and magnetism is inhaled the body cooperation magnetism and is inhaled the portion and play sealed exhaust passage's effect.

In some embodiments, the sealing disc 111 is provided with a limiting rod 112, the limiting portion 12 is provided with a limiting hole 121, and the limiting rod 112 can be inserted into the limiting hole 121. The design of gag lever post and spacing hole can let sealed dish keep good activity route when being backed down by atmospheric pressure, is favorable to the restoring to the throne of sealed dish, avoids sealed dish angular migration effect unsatisfactory that resets.

In some embodiments, the mounting portion 13 includes a stepped bearing platform to bear against the sealing disk 111. When the sealing disc is circular, the shape of the bearing platform attached to the sealing disc is circular.

In some embodiments, the sealing disk 111 and/or the mounting portion 13 is provided with a sealing gasket 113 to further seal the cell exhaust passage against air leakage in the second state. The mounting portion 13 may also be provided with a sealing groove 131 to accommodate the sealing gasket 113. The sealing gasket is arranged in the sealing groove, so that the sealing plate 111 and the mounting part 13 are tightly attached to each other, and the sealing gasket 113 is prevented from protruding to influence the air tightness of the exhaust channel in the first state.

In some embodiments, a gas collecting hood 14 is disposed on the limiting portion of the safety mechanism for collecting the gas discharged from the battery. The gas-collecting channel 14 is fixedly arranged outside the limiting part, and after the battery discharges gas, the gas-collecting channel collects the gas and can prevent external air from entering the battery.

Example 2

As shown in fig. 6, a battery case 100 includes the safety mechanism provided in the above embodiment. The mounting portion 13 of the safety mechanism includes internal/external threads fixedly mounted with corresponding external/internal threads provided on the battery case 100.

In some embodiments, the sealing disc 111 is provided with a limiting rod 112, the limiting portion 12 is provided with a limiting hole 121, and the limiting rod 112 can be inserted into the limiting hole 121. The design of gag lever post and spacing hole can let sealed dish keep good activity route when being backed down by atmospheric pressure, is favorable to the reseing of sealed dish, avoids sealed dish angular deviation reset effect unsatisfactory.

In some embodiments, the mounting portion 13 includes a stepped bearing platform to bear against the sealing disk 111. When the sealing disc is circular, the shape of the bearing platform which is attached to the sealing disc is circular.

In some embodiments, a gas collection hood 14 is provided on the restraint portion of the safety mechanism for collecting gases discharged from the battery. The gas collecting hood 14 is fixedly arranged outside the limiting part, and after the battery discharges gas, the gas collecting hood collects the gas and can prevent external air from entering the battery.

Example 3

A battery comprising the battery case provided in embodiment 2.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A safety mechanism for battery exhaust is characterized in that the safety mechanism comprises a sealing part, a limiting part and an installation part,

in a first state, the sealing disk seals the cell vent passage,

2. A safety mechanism according to claim 1, wherein the sealing disc is provided with a magnetic attraction and the mounting portion is correspondingly provided with a magnetic attraction such that the sealing disc seals the cell exhaust passage.

3. The safety mechanism according to claim 1, wherein a stopper is provided on the seal disk, and the stopper is provided with a stopper hole into which the stopper is fitted.

4. A safety mechanism according to claim 1, wherein the mounting portion comprises a stepped bearing platform to bear against the sealing disc.

5. A safety mechanism according to claim 2, wherein the sealing disc and/or the mounting portion is provided with a sealing gasket.

6. A safety mechanism according to claim 5, wherein the mounting portion is provided with a sealing groove to receive the sealing gasket.

7. The safety mechanism of claim 1, wherein the mounting portion includes internal/external threads for fixedly mounting with the battery housing.

8. The safety mechanism according to claim 1, wherein the safety mechanism is further provided with a gas collecting hood fixedly arranged outside the limiting part and sealing the exhaust port.

9. A battery housing comprising a safety mechanism as claimed in any one of claims 1 to 8.

10. A battery comprising the battery case of claim 9.