Lithium ion battery activation method

Abstract

The invention discloses a lithium ion battery activation method, which comprises the following steps that: 1, in a constant current charging stage, a current range is 0.02 to 0.1 CA, and the charging time is 1.5 to 3 hours; 2, in a constant current and constant voltage charging stage, the constant current range is 0.1 to 0.3 CA, the constant current charging is stopped until a preset voltage is reached, and the subsequent constant voltage charging is stopped until the current is 0.01 to 0.05CA; 3, in a constant current discharging stage, a current range is 0.05 to 0.2 CA, and the discharging time is 1 to 4 hours; 4, in a constant current and constant voltage charging stage, the constant current is 0.05 to 0.2 CA, the constant current charging is stopped until the preset voltage is reached, and the subsequent constant voltage charging is stopped until the current is 0.01 to 0.05CA; 5, in the constant current discharging stage, the current range is 0.05 to 0.2 CA, and the discharging time is 1 to 4 hours; and 6, in the constant current and constant voltage charging stage, the constant current is 0.05 to 0.2CA, the constant current charging is stopped until the preset voltage is reached, and the subsequent constant voltage charging is stopped until the current is 0.01 to 0.05CA. By the lithium ion battery activation method, a phenomenon that lithium ions are separated after a lithium battery is activated can be avoided.

Description

【Technical field】 [0001] The invention relates to a lithium ion battery activation method. 【Background technique】 [0002] Lithium-ion batteries, as the most popular and mainstream battery products, have been widely accepted by the public. Lithium-ion batteries are playing an increasingly important role in small earphones, mobile phones, UPS, power tools, etc., or in large electric vehicles. [0003] The product types and structural designs of lithium-ion batteries are becoming more and more diverse, especially in the product area of ​​large electric vehicles, and its structure is "a hundred flowers bloom, a hundred schools of thought contend". In order to meet the high rate and low internal resistance requirements of electric vehicles and other watersheds, the internal structure of the battery requires as many conductor tabs as possible, not limited to the original one tab structure. The welding position between the tab and the foil should be wrapped with insulating high-...

AI Technical Summary

Problems solved by technology

[0004] When activating the lithium battery, lithium will be deposited on the adhesive paper of the negative electrode. The deposition of lithium will not only consume the electrolyte, but also cause the performance of the battery to deteriorate due to the reduction of the electrolyte. Negative short circuit poses a safety hazard

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