Method for preparing positive and negative pole pieces of lithium ion secondary batteries

A secondary battery, positive and negative plate technology, applied in the field of lithium-ion secondary batteries, can solve the problems of easy overcharging of batteries, cycle attenuation of battery packs, and increased potential safety hazards of batteries, so as to achieve long service life, improve safety performance, Effect of reducing the risk of battery overcharge
CN106898730AInactive Publication Date: 2017-06-27SHENZHEN SHENG ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN SHENG ENERGY TECH CO LTD
Publication Date
2017-06-27
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for preparing positive and negative pole pieces of lithium ion secondary batteries. The method includes steps: stirring and mixing a first organic solvent, a first organic mixture and superconductivity carbon black to obtain first coating; coating front and back surfaces of a positive battery current collector or a negative battery current collector with the first coating, and drying by a drying oven to obtain a positive composite current collector or a negative composite current collector; coating front and back surfaces of the positive composite current collector with second coating, and drying by the drying oven to obtain positive or negative pole pieces, with positive temperature sensitivity, of the lithium ion secondary batteries. By implementation of the method for preparing the positive and negative pole pieces of the lithium ion secondary batteries, battery overcharge risks are reduced, battery safety is improved, and service lives of the lithium ion secondary batteries are prolonged.
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Description

technical field

[0001] The invention relates to the technical field of lithium-ion secondary batteries, and more specifically, relates to a method for preparing positive and negative electrodes of lithium-ion secondary batteries. Background technique

[0002] Lithium-ion secondary batteries are widely used in the industry because of their advantages such as high specific capacity, high working voltage, wide working temperature range, low self-discharge rate, long cycle life, no pollution and light weight.

[0003] At present, compared with lead-acid batteries and nickel-metal hydride batteries, lithium-ion batteries have an absolute advantage in the field of 3C consumer products. On the other hand, to meet the requirements of energy conservation and environmental protection, electric vehicles have broad market prospects, and as their power source, lithium-ion batteries are very competitive. Whether it is a 3C product or an electric vehicle, due to its high energy requiremen...

Claims

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