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A method of inhibiting gas generation in battery formation and a lithium ion battery formed by adopting the method

A lithium-ion battery and battery formation technology, which is applied in secondary battery charging/discharging, electrical components, secondary batteries, etc., can solve the problems of battery shell, leakage, fire and explosion, etc., so as to improve the cycle life and reduce the interface Internal resistance, effect of increasing initial capacity

Inactive Publication Date: 2017-03-15
SHENZHEN TOPBAND
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Problems solved by technology

However, the strong internal pressure of the lithium battery during the formation process can easily cause the battery shell to bulge, and even cause the danger of liquid leakage, fire and explosion during the formation process. Inflating phenomenon is the most important factor affecting the safety performance of lithium-ion batteries.

Method used

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  • A method of inhibiting gas generation in battery formation and a lithium ion battery formed by adopting the method
  • A method of inhibiting gas generation in battery formation and a lithium ion battery formed by adopting the method
  • A method of inhibiting gas generation in battery formation and a lithium ion battery formed by adopting the method

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Embodiment Construction

[0027] In order to have a clearer understanding of the technical features, purpose and effects of the invention, the specific implementation of the invention will now be described in detail with reference to the accompanying drawings.

[0028] refer to figure 1 , the invented method of suppressing battery formation and gas production, comprising the following steps:

[0029] S1. Precharge the lithium-ion battery according to a predetermined voltage. The electrolyte of lithium-ion batteries includes vinylene carbonate.

[0030] This pre-charging is carried out on the formation equipment. The predetermined voltage is 2.7V-3.2V. The pre-charge current is 0.05C. The pre-charge time can be 2h.

[0031] The lithium ion battery can be made according to the methods of the prior art. For example, the positive active material is lithium iron phosphate LiFeCOPO 4 , the negative electrode active material is modified graphite, and the separator is a double-sided ceramic separator. ...

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Abstract

A method of inhibiting gas generation in battery formation and a lithium ion battery formed by adopting the method are disclosed. The method includes S1) pre-charging the lithium ion battery according to a preset voltage, S2) putting the pre-charged lithium ion battery into a vacuum device and performing vacuumizing treatment with a low vacuum degree, S3) feeding a protective gas into the lithium ion battery, S4) charging the lithium ion battery at a constant temperature after the protective gas is fed, and S5) putting the lithium ion battery charged in the step S4) into the vacuum device and performing vacuumizing treatment with a high vacuum degree. Gas generation due to electrolyte decomposition in a formation process of the lithium ion battery is effectively inhibited by the method, thus effectively avoiding a ballooning phenomenon, and providing safety for lithium ion battery production and application. In addition, the initial capacity of the battery is increased, the battery interface internal resistance is reduced, electrochemical performance stability of the battery is effectively improved and the cyclic life of the battery is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for suppressing gas production from battery formation and a lithium-ion battery formed by the method. Background technique [0002] In recent years, lithium-ion batteries have been more and more widely used in the field of high-energy batteries and electronic products in the world. However, the strong internal pressure of the lithium battery during the formation process can easily cause the battery shell to bulge, and even cause the danger of leakage, fire and explosion during the formation process. The gas swelling phenomenon is the most important factor affecting the battery safety performance of lithium-ion batteries. Therefore, it is necessary to improve battery formation, etc., to improve battery safety performance. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a method for effectively suppressi...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/44H01M10/0525
CPCH01M10/0525H01M10/058H01M10/446Y02E60/10Y02P70/50
Inventor 余志文陈邦义周萌高晶晶赵紫薇
Owner SHENZHEN TOPBAND
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