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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

Inactive Publication Date: 2017-06-27
SHENZHEN SHENG ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that when lithium-ion batteries are charged in series, due to the difference in battery capacity, the batteries with lower capacity are easily overcharged. On the one hand, the problem of one battery will cause the cycle of the entire battery pack to rapidly attenuate. At the same time, it also greatly increases the safety hazard of the battery, and provides a preparation method for the positive and negative electrodes of the lithium-ion secondary battery to solve the existing problems

Method used

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

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] like figure 1 Shown, is the schematic flow sheet of the preparation method of lithium ion secondary battery positive and negative electrode sheet of the present invention; A kind of preparation method of lithium ion secondary battery positive and negative electrode sheet, this method comprises the steps:

[0039] S11. Stir and mix the first organic solvent, the first organic mixture and superconducting carbon black to obtain the first coating;

[0040] S12. Coating the first paint on both sides of the positive electrode battery collector or the negative electrode battery collector, and dryi...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/131H01M10/0525
CPCH01M4/13H01M4/131H01M10/0525Y02E60/10
Inventor 刘恩新于湘勇桑成涛
Owner SHENZHEN SHENG ENERGY TECH CO LTD
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