CN-224204187-U - Shell structure of battery and battery

CN224204187UCN 224204187 UCN224204187 UCN 224204187UCN-224204187-U

Abstract

The present application relates to a battery case structure and a battery. The housing structure of the battery includes a case, a cover, and a sealing member. The casing is equipped with and holds the chamber and holds the opening of chamber intercommunication, holds the chamber and is used for acceping the battery body, and the opening is located to the lid. The sealing element is arranged between the shell and the cover body and is used for sealing a gap between the shell and the cover body. The open end of the shell is provided with a buckling part which is propped against the periphery of the cover body. When the battery fails, a large amount of combustible gas is generated in the accommodating chamber, resulting in a significant increase in the gas pressure in the accommodating chamber. When the air pressure in the accommodating cavity is increased to a first preset air pressure value, the buckling part and the sealing piece can deform, a gap is formed between the shell and the cover body, and the air in the accommodating cavity can be outwards released through the gap so as to reduce the air pressure in the accommodating cavity. Therefore, the explosion of the battery can be avoided, the use safety of the battery is improved, and meanwhile, an additional production process is not needed, so that the production efficiency of the battery is improved.

Inventors

HU JIANGBO
CAO ZHIFENG
LI HONGJUN

Assignees

深圳市合壹新能技术有限公司

Dates

Publication Date: 20260505
Application Date: 20250425

Claims (10)

1. A case structure of a battery, comprising: the shell is provided with a containing cavity and an opening, the containing cavity is used for containing the battery body, and the containing cavity is communicated with the opening; A cover body arranged at the opening, and The sealing piece is arranged between the shell and the cover body and is used for sealing a gap between the shell and the cover body; The opening end of the shell is provided with a buckling part, the buckling part is propped against the periphery of one side of the cover body, which is away from the accommodating cavity, and the buckling part and the sealing piece can deform so that gas in the accommodating cavity is outwards released through the opening.
2. The battery case structure according to claim 1, wherein the open end of the case is further provided with a flange portion extending outward of the accommodation chamber, and the peripheral edge of the cover is provided on the flange portion.
3. The battery case structure according to claim 2, wherein the flange portion is disposed opposite to and spaced apart from the press portion, and the open end of the case is further provided with a connecting portion disposed between the flange portion and the press portion, the connecting portion being connected to the flange portion and the press portion to form a C-shape.
4. The battery case structure according to claim 3, wherein the peripheral edge of the cover body has a first surface, a second surface, and a side surface, the first surface being disposed opposite to the second surface, the side surface being disposed between the first surface and the second surface; The sealing element comprises a first sealing part, a second sealing part and a third sealing part, wherein the first sealing part is arranged between the first surface and the buckling part, the second sealing part is arranged between the second surface and the flange part, and the third sealing part is arranged between the side surface and the connecting part.
5. The case structure of the battery according to claim 4, wherein an end of the first sealing portion facing away from the third sealing portion is provided with a first convex ring extending from the first sealing portion in a direction facing away from the second sealing portion.
6. The case structure of the battery according to claim 4, wherein an end of the second sealing portion facing away from the third sealing portion is provided with a second convex ring extending from the second sealing portion in a direction facing away from the first sealing portion.
7. The battery case structure according to claim 4, wherein the first sealing portion, the second sealing portion, and the third sealing portion are connected to form a C-shape.
8. The case structure of a battery according to any one of claims 1 to 7, wherein the seal member is a rubber ring.
9. The case structure of a battery according to any one of claims 1 to 7, wherein the case is a stainless steel case or a cold rolled steel case.
10. A battery comprising a battery body and a housing structure of the battery according to any one of claims 1 to 9, the battery body being provided in the accommodation chamber.

Description

Shell structure of battery and battery Technical Field The application relates to the technical field of batteries, in particular to a shell structure of a battery and the battery. Background A battery is a device that converts chemical energy into electrical energy, and if the battery fails, a large amount of combustible gas is generated inside the battery, resulting in a significant increase in the gas pressure inside the battery. If not timely measures are taken, the battery can explode, and the use safety is affected. In order to ensure the use safety of the battery, an explosion-proof film is usually arranged on the battery or a metal piece of the battery is subjected to local thinning treatment. However, the above-described battery requires an additional manufacturing process, resulting in low production efficiency of the battery. Disclosure of utility model Based on this, it is necessary to provide a battery case structure and a battery, which do not require additional processes, and are advantageous in improving production efficiency. In a first aspect, the present application provides a case structure of a battery, comprising: the shell is provided with a containing cavity and an opening, the containing cavity is used for containing the battery body, and the containing cavity is communicated with the opening; A cover body arranged at the opening, and The sealing piece is arranged between the shell and the cover body and is used for sealing a gap between the shell and the cover body; The opening end of the shell is provided with a buckling part, the buckling part is propped against the periphery of one side of the cover body, which is away from the accommodating cavity, and the buckling part and the sealing piece can deform so that gas in the accommodating cavity is outwards released through the opening. In one embodiment, the opening end of the housing is further provided with a flange portion, the flange portion extends out of the accommodating cavity, and the periphery of the cover body is arranged on the flange portion. In one embodiment, the flange part is opposite to the buckling part and is arranged at intervals, the opening end of the shell is further provided with a connecting part, the connecting part is arranged between the flange part and the buckling part, and the connecting part is connected with the flange part and the buckling part to form a C shape. In one embodiment, the periphery of the cover body is provided with a first surface, a second surface and a side surface, the first surface is opposite to the second surface, the side surface is arranged between the first surface and the second surface, the sealing element comprises a first sealing part, a second sealing part and a third sealing part, the first sealing part is arranged between the first surface and the buckling part, the second sealing part is arranged between the second surface and the flange part, and the third sealing part is arranged between the side surface and the connecting part. In one embodiment, a first convex ring is arranged at one end of the first sealing part, which is away from the third sealing part, and extends from the first sealing part towards a direction away from the second sealing part. In one embodiment, a second convex ring is arranged at one end of the second sealing part, which is away from the third sealing part, and extends from the second sealing part towards the direction away from the first sealing part. In one embodiment, the first sealing portion, the second sealing portion, and the third sealing portion are connected to form a C-shape. In one embodiment, the seal is a rubber ring. In one embodiment, the housing is a stainless steel housing or a cold rolled steel housing. In a second aspect, the present application further provides a battery, including a battery body and a housing structure of the battery described in any one of the foregoing, where the battery body is disposed in the accommodating cavity. According to the shell structure of the battery and the battery, when the battery is normally used, the buckling part is propped against the periphery of the cover body. When the battery fails, a large amount of combustible gas is generated in the accommodating chamber, resulting in a significant increase in the gas pressure in the accommodating chamber. When the air pressure in the accommodating cavity is increased to a first preset air pressure value, the buckling part and the sealing piece can deform, a gap is formed between the shell and the cover body, and the air in the accommodating cavity can be outwards released through the gap so as to reduce the air pressure in the accommodating cavity. In extreme cases, for example when the air pressure in the accommodating cavity increases to a second preset air pressure value, the buckling part is tilted upwards under the action of the air pressure, and the cover body is opened to expose the opening, so that the air pressure in the accomm