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Pre-charging method of ternary soft-packed lithium-ion power battery

A power battery and soft-pack lithium technology, which is applied in the direction of secondary battery charging/discharging, non-aqueous electrolyte battery, electrolyte battery manufacturing, etc., can solve the problems of lower production efficiency and affect the economic benefits of enterprises, and achieve high production efficiency and SEI The effect of stable membrane properties and stable electrochemical system

Active Publication Date: 2019-06-04
TIANJIN ENERGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a long time of pre-charging will inevitably lead to a great reduction in production efficiency and affect the economic benefits of the enterprise.

Method used

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  • Pre-charging method of ternary soft-packed lithium-ion power battery
  • Pre-charging method of ternary soft-packed lithium-ion power battery

Examples

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Effect test

Embodiment 1

[0023] A method for precharging a ternary soft-pack lithium-ion power battery, wherein the positive electrode active material of the ternary soft-pack lithium-ion power battery is a nickel-cobalt-manganese ternary soft-pack lithium-ion power battery, wherein the nickel-cobalt-manganese ternary Material expressed as: LiNi x co y mn z o 2 , where x+y+z=1, this embodiment and the following embodiments are aimed at the nickel-cobalt-manganese 622 material.

[0024] Pre-charging the lithium-ion power battery includes the following steps:

[0025] a) Put the battery cell that has been filled with liquid and put it on the 5V60A pre-charging equipment of Hangke for pre-charging. The pre-charging temperature is 25±5℃, and the pre-charging pressure is 370±50kg; Constant current charging for 90 minutes, followed by 0.1C constant current charging for 90 minutes, and finally 0.2C constant current charging for 100 minutes;

[0026] b) Carrying out high-temperature aging for the batteri...

Embodiment 2

[0029] Same as Example 1, except that: the pre-charging step includes charging the battery at a constant current of 0.05C for 120 minutes, and then charging the battery at a constant current of 0.1C for 120 minutes.

Embodiment 3

[0031] Same as Example 1, except that the pre-charging step includes charging the battery at a constant current of 0.05C for 90 minutes, then charging the battery at a constant current of 0.1C for 90 minutes, charging the battery at a constant current of 0.2C for 60 minutes, and charging the battery at a constant current of 0.5C for 90 minutes. The battery is charged with a constant current for 27 minutes.

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Abstract

The invention provides a pre-charging method of a ternary soft-packed lithium-ion power battery, which mainly includes the following steps: (a) placing an electrical core which has been allowed to stand after liquid injection on a piece of pre-charging equipment for three-stage stepped pre-charging; (b) aging the pre-charged electrical core in step (a) at high temperature; and (c) air-pumping andshaping the electrical core after high-temperature aging in step (b) to obtain a finished ternary soft-packed battery. A three-stage pre-charging method is adopted in the invention, which has a simpleprocess. The pre-charged battery has good performance and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a precharging method for a ternary soft pack lithium-ion power battery. Background technique [0002] With the development of society and the improvement of human living standards, environmental issues have attracted more and more attention. The depletion of traditional fossil energy and the aggravation of environmental pollution have made the demand for renewable energy more and more urgent. Lithium-ion batteries have always been the first choice for environmentally friendly energy. In recent years, lithium-ion batteries have been widely used in many aspects. [0003] At present, the market demand for lithium-ion batteries is increasing, and it is imminent for battery companies to improve production processes and increase production efficiency. The pre-charging process of lithium-ion batteries is a crucial step for battery performance, and it is also an important link that affects pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M10/058
CPCY02E60/10Y02P70/50
Inventor 张志伟纪影马华李文文
Owner TIANJIN ENERGIES