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Method and device for analyzing internal gas production of cylindrical battery

A cylindrical battery and cell technology, applied in the field of lithium ion batteries, can solve the problems of cylindrical battery gas production and gas composition testing, inability to obtain accurate results, difficulty in gas collection, etc., so as to solve the actual gas production problem, Convenient collection and less interference from external impurities

Pending Publication Date: 2019-08-27
SHENZHEN BAK POWER BATTERY CO LTD
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  • Summary
  • Abstract
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Problems solved by technology

[0004] However, at present, it is very difficult to collect the gas generated during the formation and storage stages of lithium-ion batteries. The gas production and gas composition of cylindrical batteries are often tested separately through different devices, and the gas production of cylindrical batteries cannot be realized at the same time. and gas-producing components, making the analysis process complicated or even impossible to obtain accurate results

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  • Method and device for analyzing internal gas production of cylindrical battery
  • Method and device for analyzing internal gas production of cylindrical battery

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with examples, which are only preferred implementations of the present invention, and are not limitations of the present invention.

[0040] In a first aspect, the present invention provides a method for analyzing gas production inside a cylindrical battery, comprising the following steps:

[0041] S1. Provide a cylindrical battery, the cylindrical battery includes a casing, an electric core contained in the casing, and a cap for sealing the casing; the electric core includes a positive electrode sheet with a positive tab and a The negative plate of the negative tab;

[0042] S2. Connect the positive tab to the positive external tab, the negative tab to the negative external tab, both the positive external tab and the negative external tab are exposed to the cylindrical battery; on the cap Punching; Obtain the cylindrical battery to be tested;

[0043] More specifically, the cell is wound from a po...

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Abstract

The invention discloses a method and a device for analyzing the internal gas production of a cylindrical battery. The cylindrical battery to be tested is packaged by using a sealed container; gas generated in the battery in a gas production testing process is guided into the sealed container through a hole formed by punching a cover plate; on one hand, the mass change of the packaged cylindrical battery to be tested before and after gas production testing is monitored to simply and quickly measure the gas yields of the cylindrical battery in different states; and on the other hand, the gas inthe sealed container is extracted through a gas collecting nozzle, and the components of the gas are determined by an analysis instrument. The method disclosed by the invention is simple, easy to operate, capable of rapidly and accurately testing the gas yield of the cylindrical battery and the produced gas components, and high in reliability.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method and device for analyzing gas production inside a cylindrical battery. Background technique [0002] New energy technology is a recognized high-tech in the contemporary era. As an important part of the new energy field, the lithium-ion battery industry has attracted attention from all walks of life. With the advantages of high voltage, good safety, no memory, and environmental friendliness, it has quickly become the main driving power source for electronic products such as mobile phones, computers, digital cameras, video cameras, and PDAs. In recent years, power supply has become a new development direction of lithium-ion batteries. With the development of electric vehicles and hybrid vehicles, lithium-ion batteries show their stronger advantages in terms of power supply. [0003] At present, the production of lithium-ion batteries has begun to take shape,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N30/02G01F22/00
CPCG01F22/00G01N1/2226G01N30/02
Inventor 袁知洋李维李达夏进阳宋华杰叶威麟
Owner SHENZHEN BAK POWER BATTERY CO LTD
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