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Method for cleaning cleaning polyalcohol lithium ion battery afflux liquid

A technology for lithium-ion batteries and current collectors, applied in liquid cleaning methods, cleaning methods and utensils, inorganic non-surface-active cleaning compositions, etc., can solve the problem of poor cycle performance of rate discharge batteries, poor cleaning effect of current collectors, Low production efficiency and other issues, to achieve excellent battery cycle performance, improve battery consistency, and improve production efficiency

Active Publication Date: 2008-04-16
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention solves the problems of intermittent cleaning in the prior art, low production efficiency, high manufacturing cost, poor cleaning effect of the current collector, and poor charge and discharge, rate discharge, and battery cycle performance of the battery cell. Provides a safe, environmentally friendly, high production efficiency, good cleaning effect collector cleaning method

Method used

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  • Method for cleaning cleaning polyalcohol lithium ion battery afflux liquid
  • Method for cleaning cleaning polyalcohol lithium ion battery afflux liquid

Examples

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Effect test

Embodiment 1

[0019] A method for cleaning a current collector, which uses a cleaning solution to ultrasonically clean a punched copper or aluminum mesh collector and then cleans the current collector with water; the cleaning solution contains the surface active sodium dodecylbenzene sulfonate The weight part is 80g of sodium carbonate detergent, 30g of sodium carbonate detergent, 10g of trihydric alcohol phosphate corrosion inhibitor and water, and then the current collector is continuously cleaned. Ultrasonic generating device, when the current collector flows through the liquid storage tank, the ultrasonic wave generates a powerful wave impact near the current collector and cooperates with the cleaning liquid to remove the dirt on the current collector. After ultrasonic cleaning, wash away the residual liquid on the current collector with clean water, then soak the copper current collector with a sulfuric acid solution with a pH value of 0.6 for 5 minutes, and soak the aluminum current co...

Embodiment 2

[0021] A method for cleaning a current collector, which uses a cleaning solution to ultrasonically clean a punched copper or aluminum mesh collector and then cleans the current collector with water; the cleaning solution contains the surface active sodium dodecylbenzene sulfonate The weight part is 80g of sodium carbonate detergent, 30g of sodium carbonate detergent, 10g of trihydric alcohol phosphate corrosion inhibitor and water, and then the current collector is continuously cleaned. Ultrasonic generating device, when the current collector flows through the liquid storage tank, the ultrasonic wave generates a powerful wave impact near the current collector and cooperates with the cleaning liquid to remove the dirt on the current collector. After ultrasonic cleaning, wash away the residual liquid on the current collector with clean water, soak the copper current collector with a sulfuric acid solution with a hydrogen ion concentration of 0.40mol / L for 10 minutes, and then soa...

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Abstract

The present invention relates to a method for cleaning the collector of the polymer lithium ion battery, especially a method for cleaning the copper or aluminum net collector for a plurality of times. The invention comprises the following procedures: A. doing ultrasonic cleaning to the copper or aluminum net collector of the punching with the cleaning liquid and then cleaning the collector with water; B. cleaning the collector with the acidic or alkali liquid; C. recleaning the collector with water. The present invention settles the problems of low production efficiency, high manufacturing cost, bad cleaning effect to the collector, causing the charging and discharging of the electric core, inferior multiplying factor discharging and battery circulating performance, etc. which exist in the batch type cleaning of the existing technique, and provides a collector cleaning method with the advantages of good safety, environment protecting, high production efficiency and good cleaning effect.

Description

technical field [0001] The invention relates to a method for cleaning polymer lithium ion battery current collectors, in particular to a method for repeatedly cleaning copper or aluminum grid current collectors. Background technique [0002] In the field of lithium secondary battery production, liquid lithium-ion battery pole pieces are made by attaching a layer of electrode slurry on the current collector; while polymer lithium batteries are made by attaching electrode slurry to punched copper and aluminum grids. However, the quality of the bonding between the pole piece and the current collector affects the performance of the battery. At present, there is no current collector cleaning process in the manufacturing process of liquid lithium batteries. Since the processing of punched copper and aluminum foil inevitably brings fine metal shavings, impurities, and dirt, once these impurities and dirt are attached to the current collector together with the battery materials , w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B3/12B08B3/08B08B3/00H01M4/04C11D7/08C11D7/06
CPCY02E60/12
Inventor 张兴国邓龙征唐伟何峰朱保恩郑利峰张克俭俞琴
Owner WANXIANG 123 CO LTD
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