A manufacturing method and application of lightweight battery negative electrode sheet

A battery anode, lightweight technology, used in electrode manufacturing, battery electrodes, electrode rolling/calendering, etc., can solve the problems of production cost copper metal resource consumption, price rise and other problems, to improve repeatability, weight reduction, production low cost effect

Inactive Publication Date: 2018-12-11
桑顿新能源科技(长沙)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the positive electrode current collector is mainly aluminum foil, and the negative electrode current collector is mainly copper foil. With the continuous promotion and expansion of the new energy field, the price of raw materials for lithium battery related industries continues to rise, especially in 2017. The price of copper foil once reached 120,000 yuan / ton , a large number of applications of copper metal and rising prices have caused enormous pressure on the production costs of enterprises and the massive consumption of copper metal resources

Method used

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  • A manufacturing method and application of lightweight battery negative electrode sheet
  • A manufacturing method and application of lightweight battery negative electrode sheet
  • A manufacturing method and application of lightweight battery negative electrode sheet

Examples

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example 1

[0027] A method for preparing a lightweight battery negative electrode sheet, comprising:

[0028] S1: Preparation of the negative electrode conductive substrate: select a polyester film (PET) with a specification of 10um*390mm and a hardness of 1HB. Print the grid pattern on the screen printing machine with 250-600 mesh screen, such as figure 2 As shown, the silk screen area is 10mm wide in both horizontal and vertical directions, and the blank area is a square with a side length of 10mm. A 2-5um thick acrylic glue solution is coated on the PET film 1, and is cured and dried by ultraviolet light. Put the PET film 1 on a smooth glass surface and fix it, then place the screen on the PET film 1 and press it tightly. The silver paste is scraped back and forth on the screen, the pattern on the screen is printed on the PET film 1, and dried at 60°C to obtain a conductive silver paste coating 3 with a thickness of 5um, and then the PET film 1 obtained above is pressed as follows ...

Embodiment 2

[0038] A method for preparing a lightweight battery negative electrode sheet, comprising:

[0039] S1: Preparation of the negative electrode conductive substrate: select a polyester film (PET) with a specification of 250um*390mm and a hardness of 1HB. Print the grid pattern on the screen printing machine with 250-600 mesh screen, such as figure 2 As shown, the silk screen area is 10mm wide in both horizontal and vertical directions, and the blank area is a square with a side length of 10mm. A 2-5um thick acrylic glue solution is coated on the PET film 1, and is cured and dried by ultraviolet light. Put the PET film 1 on a smooth glass surface and fix it, then place the screen on the PET film 1 and press it tightly. The silver paste is scraped back and forth on the screen, the pattern on the screen is printed on the PET film 1, and dried at 60°C to obtain a conductive silver paste coating 3 with a thickness of 20um, and then the PET film 1 obtained above is pressed as follow...

Embodiment 3

[0046] A method for preparing a lightweight battery negative electrode sheet, comprising:

[0047] S1: Preparation of the negative electrode conductive substrate: select a polyester film (PET) with a specification of 25um*390mm and a hardness of 1HB. Print the grid pattern on the screen printing machine with 250-600 mesh screen, such as figure 2 As shown, the silk screen area is 10mm wide in both horizontal and vertical directions, and the blank area is a square with a side length of 10mm. A 2-5um thick acrylic glue solution is coated on the PET film 1, and is cured and dried by ultraviolet light. Put the PET film 1 on a smooth glass surface and fix it, then place the screen on the PET film 1 and press it tightly. The silver paste is scraped back and forth on the screen, the pattern on the screen is printed on the PET film 1, and dried at 60°C to obtain a conductive silver paste coating 3 with a thickness of 15um, and then the PET film 1 obtained above is pressed as follows...

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Abstract

The invention discloses a preparation method of a lightweight battery negative electrode sheet, comprising the preparation of a negative electrode conductive base and coating a negative electrode paste on the negative electrode conductive base. The preparation method of the negative electrode conductive base comprises the following steps: S1, selecting a polymer plastic hardening film with a certain specification and hardness; 2, screen printing a layer of grid-shaped conductive metal solid solution slurry on that polymer plastic hardening film, drying to obtain a grid-shaped conductive metalsolid solution; 3, coating a layer of conductive agent on that polymer plastic cure film to obtain a negative electrode conductive substrate. The invention uses flexible and certain hardness high molecular plastic hardening film as carrier, coats a small amount of grid-like conductive metal solid solution as skeleton, coats a layer of conductive agent, saves metal resources and reduces the cost ofpole piece raw materials.

Description

technical field [0001] The invention belongs to the technical field of battery negative electrodes, and in particular relates to a preparation method and application of lightweight battery negative electrodes. Background technique [0002] Lithium-ion battery is a secondary battery mainly composed of positive and negative active materials, separator, electrolyte, packaging shell, positive and negative current collectors, etc. At present, the positive electrode current collector is mainly aluminum foil, and the negative electrode current collector is mainly copper foil. With the continuous promotion and expansion of the new energy field, the price of raw materials for lithium battery related industries continues to rise, especially in 2017. The price of copper foil once reached 120,000 yuan / ton , a large number of applications of copper metal and rising prices have caused enormous pressure on the production costs of enterprises and the massive consumption of copper metal reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/74H01M4/139H01M4/04H01M2/26H01M10/0525H01M10/052H01M10/054
CPCH01M4/0404H01M4/0435H01M4/0471H01M4/139H01M4/661H01M4/663H01M4/667H01M4/745H01M10/052H01M10/0525H01M10/054H01M50/531Y02E60/10
Inventor 陈建鹏娄忠良余开明徐伟崔俊葳
Owner 桑顿新能源科技(长沙)有限公司
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