Button cell

A button battery and battery technology, which is applied to battery components, circuits, electrical components, etc., can solve problems such as high-temperature burns, difficulty in releasing gas, and elevated temperature and pressure, so as to avoid safety accidents, high-temperature burns or explosions Effect

Pending Publication Date: 2020-09-18
AAC TECH NANJING
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  • Abstract
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Problems solved by technology

However, when the button battery in the prior art is in the process of overcharging or overdischarging, and when the positive and negative poles are short-circuited and other abnormal conditions, the temperature of the battery will rise. Since the battery body is still in a sealed state, the gas inside the battery is difficult to release, causing the battery The internal temperature of the battery body and the internal pressure of the battery body will continue to rise, which may cause safety accidents such as high temperature burns or explosions

Method used

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, inside, outside, top, bottom...) in the embodiments of the present invention are only used to explain As shown in the figure), if the relative positional relationship between the various components, etc., if the specific posture changes, the directional indication will also change accordingly.

[0038] It should also be noted that when an element is referred to as being “fixed” or “disposed on” another element, the element may be directly on the other element or there may be an intervening element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

[0039] refer to Figure 1-Figure 9 , the embodiment of the present in...

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Abstract

The invention provides a button cell. The button cell comprises a first electrode cover assembly, a second electrode cover assembly in insulation connection with the first electrode cover assembly, asealing piece and a cell body with a positive electrode and a negative electrode; the first electrode cover assembly and the second electrode cover assembly enclose to form an accommodating cavity foraccommodating the cell body; one of the positive electrode and the negative electrode of the cell body is connected with the first electrode cover assembly, and the other one is connected with the second electrode cover assembly; a through hole communicated with the accommodating cavity is formed in the second electrode cover assembly in a penetrating manner; the first electrode cover assembly and the second electrode cover assembly are sealed through the sealing piece, and the sealing piece covers the through hole; when the temperature of the cell body exceeds a threshold value, the sealingpiece is heated to be molten, and gas in the button cell is diffused to the outside through the through hole and a gap between the first electrode cover assembly and the second electrode cover assembly, so that the safety accident of high-temperature scalding or explosion caused by continuous rising of the temperature in the button cell and rising of the pressure in the button cell is avoided.

Description

【Technical field】 [0001] The invention relates to the technical field of batteries, in particular to a button battery. 【Background technique】 [0002] Button batteries are also divided into two categories: chemical batteries and physical batteries, and chemical batteries are the most commonly used. They consist of an anode (positive pole), a cathode (negative pole) and their electrolyte. There is a sealing ring for insulation between the positive electrode and the negative electrode. The sealing ring is made of nylon. The sealing ring can not only play an insulating role, but also prevent electrolyte leakage. However, when the button battery in the prior art is in the process of overcharging or over-discharging, and when the positive and negative poles are short-circuited and other abnormal conditions, the temperature of the battery will increase. Since the battery body is still in a sealed state, the gas inside the battery is difficult to release, resulting in the battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/04H01M2/08H01M2/12
CPCY02E60/10H01M50/153H01M50/109
Inventor 张健何家勇徐斌
Owner AAC TECH NANJING
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