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Safety device for lithium ion battery

A lithium-ion battery and safety device technology, which is applied in the direction of batteries, secondary batteries, battery pack components, etc., can solve the problem that the flip sheet cannot be guaranteed to be separated from the conductive sheet, etc.

Inactive Publication Date: 2015-04-29
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the turning piece and the conductive piece are welded together, the effect of the pressure difference cannot ensure that the turning piece is separated from the conductive piece

Method used

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  • Safety device for lithium ion battery
  • Safety device for lithium ion battery
  • Safety device for lithium ion battery

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Experimental program
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Effect test

Embodiment Construction

[0022] The present invention and its beneficial effects will be described in further detail below in conjunction with specific embodiments and accompanying drawings, but the specific embodiments of the present invention are not limited thereto.

[0023] See Figure 1-6 , a safety device for a lithium-ion battery, comprising a top cover sheet 1, a first pole 2, a second pole 3, a flipping sheet 4 and a conductive sheet 5, the conductive sheet 5 is rectangular, the first pole 2 and the second The poles 3 are respectively placed on the top cover sheet 1, and the first pole 2 is insulated from the conductive sheet 5, and the flipping sheet 4 is arranged between the first pole 2 and the conductive sheet 5, and the flipping sheet 4 is connected to the first pole The column 2 is electrically connected with the conductive sheet 5, the conductive sheet 5 is provided with a concave surface 6, the thickness of the concave surface 6 is 1 mm, the concave surface 6 is provided with a notch ...

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a safety device for a lithium ion battery. The safety device comprises a top cover plate, a first post, a second post, an overturning plate and a conducting plate, wherein the first and second posts are arranged on the top cover plate; the first post is assembled with the conducting sheet in an insulating manner; the overturning plate is arranged between the first post and the conducting plate, and is electrically connected with the first post and the conducting plate respectively; the conducting plate is provided with a sunken surface with a nick. According to the safety device for the lithium ion battery, the lithium ion battery is provided with the overturning plate and the conducting plate, which are electrically connected with each other, the sunken surface is arranged on the conducting plate, and the nick is formed in the sunken surface, therefore, the sunken surface can be effectively broken by air pressure to cut off a charging circuit when the air pressure in the lithium ion battery reaches a limit value, and a safety protection function is realized.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a safety device for lithium ion batteries. Background technique [0002] With the development of modern society and the enhancement of people's awareness of environmental protection, electric vehicles are more and more inclined to use lithium-ion batteries as their energy source. The power battery should not only have high capacity, but also have good safety and cycle life. In order to ensure the safety of the power battery to a certain extent, a pressure relief valve is generally installed on the top cover of the battery. When the battery has an accident due to improper charging, short circuit or exposure to high temperature and other harsh environments, the high-energy battery will be released. A large amount of gas is produced and the temperature rises sharply, and the gas rushes open the pressure relief valve to achieve the purpose of pressure relie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/34H01M2/12H01M10/0525H01M50/342H01M50/578
CPCH01M10/0525H01M50/394H01M50/572H01M2200/20Y02E60/10H01M50/578
Inventor 蔡如来王鹏邓平华屈琼余鹏
Owner NINGDE AMPEREX TECH
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