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Production technology for polymer lithium battery anode and cathode slice

A production process and technology of lithium batteries, applied in the direction of battery electrodes, electrode manufacturing, electrode carriers/collectors, etc., can solve the problems of continuous and poor automation of cathode and anode sheet preparation, large film thickness deviation, and reduce production technology, etc., to achieve Realization of serialization and automation, small thickness deviation, and less production process

Active Publication Date: 2008-09-10
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the shortcomings of heavy cathode and anode films and large film thickness deviation in the preparation of cathode and anode sheets in the prior art, and provides a new coating process to ensure that the thickness deviation of the cathode and anode films is small and reduce the weight of the cathode and anode film. Production process of cathode and anode sheet for lithium battery
[0006] The present invention also solves the shortcomings of continuous and poor automation in the preparation of cathode and anode sheets of lithium-ion batteries in the prior art, and provides a production process for cathode and anode sheets of polymer lithium batteries that is easy for continuous automatic production, can improve production efficiency and reduce costs

Method used

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  • Production technology for polymer lithium battery anode and cathode slice
  • Production technology for polymer lithium battery anode and cathode slice

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: a kind of polymer lithium battery cathode and anode sheet production process (see attached figure 1 attached figure 2 ), including the following steps:

[0028] a. Cleaning: Use punched copper foil as the current collector. The porosity of the copper foil is 45%, and the aperture is 1.2mm. First remove the oil from the copper foil, and then clean it with an active agent. The active agent is controlled at a mass ratio of 1 to water. / 9, at a temperature of 40°C, wash for 70s, then pickle, the concentration of pickling is controlled at 0.3mol / L, at a temperature of 35°C, wash for 70s, then rinse with clean water and pickle at a temperature of 80°C down drying;

[0029] b. Coating conductive glue: apply a layer of conductive glue on the dried current collector, the thickness of the conductive glue is 8 μ, then fully dry, and place it on the unwinding roller 1;

[0030] c. Prepare cathode and anode slurry: use a rotational viscometer to select an anode and...

Embodiment 2

[0033] Embodiment 2: a kind of production process of cathode and anode sheet of polymer lithium battery, comprises the following steps:

[0034] a. Cleaning: Use punched aluminum foil as the current collector. The aluminum foil has a porosity of 38% and a pore diameter of 1.3mm. First remove the oil from the aluminum foil and clean it with an active agent. The active agent is controlled at a mass ratio of 1 / 8 to water. Wash for 80s at a temperature of 50°C, then carry out alkali washing, the concentration of alkali washing is controlled at 0.8mol / L, wash for 80s at a temperature of 40°C, then rinse with clean water and dry at a temperature of 90°C ;

[0035] b. Coating conductive glue: apply a layer of conductive glue on the dried current collector, the thickness of the conductive glue is 10μ, then fully dry, and place it on the unwinding roller 1;

[0036] c. Prepare cathode and anode slurry: use a rotational viscometer to select an anode and cathode slurry with a suitable v...

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Abstract

The invention relates to a production technique of cathode and anode flakes of a lithium polymer battery, solving the disadvantages of large deviation of membrane weight and membrane thickness in the process of preparing cathode and anode flakes in the prior art. The production technique is characterized by comprising the following steps: a. a current collector is washed with acid base or alkali acid, and then fully rinsed with clean water; b. the washed current collector is coated with a layer of conductive adhesive and fully dried; c. cathode and anode flake slurry with proper stickiness is prepared and removed of large particles inside by screening; d. the current collector is unreeled on an unreeling guiding rail and directly sprayed with the cathode and anode flake slurry and fully dried; e. reeling. A nozzle is directly used for spraying, which ensures that the cathode and anode membranes are light with small thickness deviation, simple operation technique and less production procedures of the cathode and anode flakes, thereby improving the rate of finished products with low cost and realizing continuous and automatic mass production of the lithium ion battery.

Description

technical field [0001] The invention relates to a production process of cathode and anode sheets of polymer lithium batteries. Background technique [0002] As the world is facing increasingly serious environmental problems and future oil and other energy sources will be exhausted, it is an urgent task for mankind to seek renewable energy. As a new bag of green high-energy batteries, lithium-ion batteries have high voltage, high specific energy, and Memory effect, no pollution, light weight and many other advantages are widely used in mobile communications, notebook computers, UPS, electric bicycles and electric bicycles, and are considered to be of great significance to the national economy and people's lives in the 21st century. High-tech products. [0003] Lithium-ion batteries are attracting more and more attention, and their technical performance is much superior to that of lead-acid and nickel-metal hydride batteries, especially polymer lithium-ion batteries. Due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/64H01M4/1399
CPCY02E60/10
Inventor 邓龙征张兴国丁芝玲左金鹏方火林
Owner WANXIANG 123 CO LTD
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