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A kind of formation method of lithium battery

A formation method and lithium battery technology, which is applied in the manufacture of secondary batteries, electrochemical generators, electrolyte batteries, etc., can solve the problems of poor system and shorten formation time, so as to improve production efficiency, shorten formation time, and improve cycle performance Effect

Active Publication Date: 2022-04-22
ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of poor systematic formation of electric current, the present invention provides a lithium battery formation method, which establishes the corresponding relationship between the current, temperature, and power during the formation of the battery cell through the formula, so that the SEI of the battery cell after formation can be more stable and dense. The cycle performance is better, the formation time is also shortened, and the production efficiency is improved

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  • A kind of formation method of lithium battery
  • A kind of formation method of lithium battery
  • A kind of formation method of lithium battery

Examples

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Effect test

Embodiment 1

[0019] A method for the formation of a lithium battery, comprising the following steps: placing the ternary + graphite system batteries that are normally mass-produced and filled with liquid, placed at high temperature; after the standing is completed, put them into high-temperature pressurized formation equipment, and the pressure is set to 0.4Mpa, put in the cell and let it stand for 3 minutes to ensure that the cell is in good contact with the formation voltage sampling equipment, and then power on for formation; during the formation process, the first step: constant current charging, current I1:0.08C, charging state of charge Q1: 15%, temperature T1: 10°C; second step: constant current charging, current I2: 0.22C, charging state of charge Q2: 25%, temperature T2: 25°C; third step: constant current charging, current I3: 0.4 C, charging state of charge Q3: 55%, temperature T3: 45°C.

Embodiment 2

[0021] A lithium battery formation method, the difference from Example 1 lies in the formation process, the first step: constant current charging, current I1: 0.12C, charging state of charge Q1: 15%, temperature T1: 10°C; the second step : Constant current charging, current I2: 0.25C, charging state of charge Q2: 35%, temperature T2: 30℃; the third step: constant current charging, current I3: 0.42C, charging state of charge Q3: 65%, temperature T3: 50°C.

Embodiment 3

[0023] A method for the formation of a lithium battery, the difference from Example 1 lies in the formation process, the first step: constant current charging, current I1: 0.10C, charging state of charge Q1: 20%, temperature T1: 10°C; the second step : Constant current charging, current I2: 0.30C, charging state of charge Q2: 35%, temperature T2: 40°C; third step: constant current charging, current I3: 0.45C, charging state of charge Q3: 55%, temperature T3: 55°C.

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Abstract

The invention belongs to the field of lithium battery manufacturing. In order to solve the problem of poor systematic formation of electric current, a method for forming a lithium battery is provided, which includes the following steps: after injecting liquid into the battery cell of lithium ions, it is left still and formed, and the temperature during the formation process is The temperature is 5-60°C, the surface pressure of the cell is 0.3-0.5Mpa, and the current is in the range of 0.01-0.6C. The present invention establishes the corresponding relationship through formulas for the electric current, temperature, and power during the formation of the battery cell, which can make the SEI of the battery cell after formation more stable and dense, with better cycle performance, shorten the formation time, and improve production efficiency.

Description

technical field [0001] The invention belongs to the field of lithium battery manufacturing, and more specifically relates to a method for forming a lithium battery. Background technique [0002] With the development of society and the advancement of technology, clean and efficient new energy has been paid more and more attention by the country and people. Among them, since the commercialization of lithium-ion secondary batteries, due to their excellent cycle performance, rate performance, high power, high energy density and other advantages, they have attracted the attention of the public and have been widely used in electric vehicles, buses, mobile phones, Notebooks, electric bicycles, electric tools, energy storage, etc. [0003] In the production process of lithium-ion batteries, it includes ingredients, coating, sheet production, assembly, baking, liquid injection, chemical formation and battery sorting, PACK and other processes. Although the production processes of eac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44H01M10/058H01M10/0525
CPCH01M10/446H01M10/058H01M10/0525Y02P70/50Y02E60/10
Inventor 苏锋常林荣
Owner ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL