Unlock instant, AI-driven research and patent intelligence for your innovation.

Lithium ion battery pole plate manufacturing method

A technology of lithium-ion batteries and manufacturing methods, which is applied in the field of lithium-ion battery plate production, and can solve the problems of uneven local capacity of pole pieces, high cost of three-dimensional conductive current collectors, etc.

Inactive Publication Date: 2021-04-20
SHUANGDENG GRP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of the three-dimensional conductive current collector is high, and it is difficult for the active material to completely fill the internal space of the three-dimensional current collector, resulting in uneven local capacity of the pole piece, resulting in lithium precipitation at the negative electrode, and there are potential safety hazards

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lithium ion battery pole plate manufacturing method
  • Lithium ion battery pole plate manufacturing method
  • Lithium ion battery pole plate manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] S1, lithium iron phosphate, conductive carbon black, and polyvinylidene fluoride are uniformly mixed according to a mass ratio of 90%:5%:5% to obtain a mixed powder.

[0028] S2, use a 0.8mm thick aluminum bus grid 100 to place in the bottom mold 4 of the plate forming mold 200, pour the mixed powder into the bottom mold 4, cover the grid bus bar 2 of the bus grid 100, and expose the bus Grid lug 1 of grid 100 . The temperature of the top mold 3 and the bottom mold 4 is heated to 170°C, the top mold 3 of the plate forming mold 200 is pressed, and the active mixed powder is combined with the bus grid 100 to form the negative electrode plate 300, and the negative electrode plate is hot-pressed Thickness 2mm.

[0029] S3, grinding the burrs on the edge of the pole plate and the floating powder at the plate grid lug 1.

Embodiment 2

[0031] S1, graphite, conductive carbon black, and polyvinylidene fluoride are uniformly mixed according to the mass ratio of 93%: 3%: 4% to obtain a mixed powder.

[0032] S2, use 0.5mm thick copper bus grid 100 to place in the bottom mold 4 of the plate forming mold 200, pour the mixed powder into the bottom mold 4, cover the grid bus bar 2 of the bus grid 100, and expose the bus Grid lug 1 of grid 100 . The temperature of the top mold 3 and the bottom mold 4 is heated to 180°C, the top mold 3 of the plate forming mold 200 is pressed, and the active mixed powder is combined with the bus grid 100 to form the positive electrode plate 300, and the positive electrode plate is hot-pressed Thickness 1.2mm.

[0033] S3, grinding the burrs on the edge of the pole plate and the floating powder at the plate grid lug 1.

Embodiment 3

[0035] S1, ternary, conductive carbon black, carbon nanotubes, and polyvinylidene fluoride are uniformly mixed according to the mass ratio of 95%: 1%: 1%: 3% to obtain a mixed powder.

[0036] S2, use a 1.0mm thick aluminum bus grid 100 to place in the bottom mold 4 of the plate forming mold 200, pour the mixed powder into the bottom mold 4, cover the grid bus bar 2 of the bus grid 100, and expose the bus Grid lug 1 of grid 100 . The temperature of the top mold 3 and the bottom mold 4 is heated to 200°C, the top mold 3 of the plate forming mold 200 is pressed, and the active mixed powder is combined with the bus grid 100 to form the positive electrode plate 300, and the positive electrode plate is hot-pressed Thickness 1.2mm.

[0037] S3, grinding the burrs on the edge of the pole plate and the floating powder at the plate grid lug 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a manufacturing method of a lithium ion battery pole plate. The method comprises the following steps: sampling 80-95% by mass of a positive or negative active substance, 2-10% by mass of a conductive agent and 3-10% by mass of an adhesive, mixing, carrying out hot press molding by using dry powder, melting the adhesive at temperature and pressure, and adhering the powder to obtain a pole piece. The use of an NMP solvent is cancelled, high-precision coating equipment and expensive NMP recovery equipment are not needed, the investment scale is small, and energy conservation and environmental protection are realized. The method is suitable for manufacturing the super-thick lithium ion battery pole plate, the current collector and the diaphragm are easy to use, the energy density of the battery is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a method for manufacturing lithium-ion battery polar plates. Background technique [0002] It has been 30 years since lithium-ion batteries came out in the 1990s. Because of their small size, light weight, long cycle life, and environmental friendliness, they are widely used in portable electronic products, electric vehicles, and energy storage. In order to meet the needs of more usage scenarios, it is necessary to continuously improve the energy density of batteries and reduce the cost of batteries. The usual practice is the application of new materials and the innovation of processes. In recent years, high-energy-density materials such as high-nickel ternary cathode materials and silicon-carbon anode materials have become increasingly mature, and the energy density of batteries has continued to increase. However, there are few breakthroughs in the production process of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M4/04H01M4/36H01M10/0525
CPCY02E60/10
Inventor 孙全司晓影肖莹程传捷卢珊珊
Owner SHUANGDENG GRP