Method and device for controlling lithium battery formation

A lithium battery and control parameter technology, applied in the field of lithium battery formation control, can solve the problems of general SEI film formation effect, low degree of automation, and high energy consumption of formation equipment, so as to achieve reasonable and intelligent formation process, improve automation degree, The effect of improving utilization efficiency

Active Publication Date: 2014-03-26
SHENZHEN KEXIN COMM TECH
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  • Summary
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Low degree of automation, unable to meet mass production;
[0007] 2. Lack of effective control of the conditions for the formation of the SEI film, resulting in a general effect of the formation of the SEI film of lithium batteries;
[0008] 3. Formation equipment consumes a lot of energy

Method used

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  • Method and device for controlling lithium battery formation
  • Method and device for controlling lithium battery formation
  • Method and device for controlling lithium battery formation

Examples

Experimental program
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Effect test

Embodiment 1

[0036] see figure 1 , an embodiment 1 of a method for forming a lithium battery, comprising the following steps:

[0037] S101: importing or inputting control parameters;

[0038] When importing or inputting control parameters, it is judged whether the control parameters are within the preset parameter range, if yes, the control parameters are imported, otherwise, the control parameters corresponding to the existing formation models are imported;

[0039] The formation model uses a data table to represent the electrochemical parameters (voltage, current, temperature) during the formation process and the corresponding process control time. The expression is (U, I, T, t), U represents voltage, I Represents the current, T represents the battery temperature, and t represents the time. The expression process controls the battery formation by using the voltage value U, current value I, and temperature value T within the time t. The formation model is expressed as (U 0 , I 0 ,T ...

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Abstract

The invention discloses a method for controlling the lithium battery formation. The method comprises the following steps: importing or inputting a control parameter, controlling a formation device according to the control parameter, collecting an environmental parameter, and judging whether the environmental parameter is out of a preset parameter range or not, if yes, adjusting the control parameter and controlling the formation device. By adopting the method provided by the invention, the battery formation automation degree can be improved, so that the forming process of a lithium battery is more reasonable and intelligent, and a better SEI (solid electrolyte interface) film is formed by virtue of controlling the formation environment; through calculating the energy consumption of the device, the energy consumption of each lithium battery formation is more reasonable, and the utilization efficiency of electric energy is improved. The invention further discloses a device for controlling the lithium battery formation.

Description

technical field [0001] The invention relates to a lithium battery formation technology, in particular to a method and device for controlling the formation of a lithium battery. Background technique [0002] A lithium battery is mainly composed of a positive electrode, a negative electrode, an electrolyte, and an SEI film. Among them, the SEI film is the reaction between the electrode material and the electrolyte at the solid-liquid phase interface during the first charge and discharge process of the liquid lithium battery, forming a passivation layer covering the surface of the electrode material. The formation of the SEI film of a lithium battery is based on the consumption of lithium ions in the positive electrode of the battery and the efficiency of its electrochemical reaction, which is directly reflected in the consumption of lithium ions. The formation of the SEI film consumes a large amount of lithium ions, which means that the first charge and discharge increases th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M10/058H01M10/4242Y02E60/10Y02P70/50
Inventor 曾广忠
Owner SHENZHEN KEXIN COMM TECH
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