A kind of test method of moisture content in power lithium battery

A test method and technology for lithium batteries, which are used in measurement devices, analytical materials, material weighing, etc., to achieve the effect of simple and easy-to-operate methods
CN106198293BActive Publication Date: 2019-03-29HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI GUOXUAN HIGH TECH POWER ENERGY
Publication Date
2019-03-29

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Abstract

The invention discloses a method for testing the content of moisture in a power lithium battery and belongs to the field of power lithium batteries. The method comprises the following steps: a) testing the weight of a cell before formation for standby; b) connecting the cell onto a formation cabinet, and forming the cell by using a forming process with the current not higher than 0.5 C; c) after the end of formation, deriving a cell forming curve; d) according to time t corresponding to a first voltage platform in the forming curve, substituting into a formula M=KIt to calculate the quality of electrolytic generated water; e) according to the percentages of positive and negative plates of the battery occupying the weight of the battery, calculating the total weight of the positive and negative plates of the battery; f) calculating the content of the moisture in the battery by dividing the mass of the electrolyzed water by the total weight of the positive and negative plates of the battery. The method for testing the content of the moisture in the power lithium battery, disclosed by the invention, is simple and easy to operate; the moisture in the battery is tested, and meanwhile, the effect of the moisture on the performance of the battery is verified.
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Description

technical field

[0001] The invention relates to a method for testing the moisture content in a power lithium battery, belonging to the field of power lithium batteries. Background technique

[0002] At present, in the manufacturing process of lithium-ion batteries, the moisture in the pole piece must be strictly controlled. The moisture in the pole piece has a great impact on the lithium-ion battery, mainly causing the following adverse consequences: the moisture inside the battery will interact with the electrolyte inside the battery A reaction occurs, and the reaction product is gas and hydrofluoric acid, the gas will cause the battery shell to swell, hydrofluoric acid is a very corrosive acid, it can corrode the metal parts inside the battery, and the battery will eventually leak , eventually causing the failure of the lithium battery.

[0003] Therefore, in the production process of lithium-ion batteries, the humidity of the environment and the water content of positive...

Claims

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