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Power energy storage polymer lithium ion battery

A lithium-ion battery and power energy storage technology, which is applied in the direction of secondary batteries, battery electrodes, battery components, etc., to achieve the effects of increasing content, improving rate discharge performance, and reducing production costs

Inactive Publication Date: 2017-09-22
SHENZHEN GPC ENERGY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the preparation technology and process of the existing power energy storage polymer lithium-ion battery still need to be further improved and developed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The power energy storage polymer lithium-ion battery of this embodiment is made of two winding cells connected in parallel and then packaged with aluminum-plastic film; each cell includes a positive electrode piece, a separator, a negative electrode piece, an electrolytic liquid and tabs; the positive electrode sheet is made by coating the positive electrode slurry prepared by the pre-sanding process; the negative electrode sheet is made by coating the negative electrode slurry prepared by the pre-sanding process; each cell includes Positive pole lug and negative pole lug, the positive pole lug is made of aluminum alloy with a purity greater than 99%, the width is 50mm, and the thickness is 0.30mm, the negative pole lug is made of nickel-plated copper material, the width is 50mm, and the thickness is 0.30mm; the positive electrode slurry The coating surface density is 120 g / ㎡; the negative electrode slurry coating surface density is 60 g / ㎡.

[0020] The above-mentioned ...

Embodiment 2

[0023]The power energy storage polymer lithium-ion battery of this embodiment is made of 5 winding cells connected in parallel and then packaged with aluminum-plastic film; each cell includes a positive electrode piece, a separator, a negative electrode piece, an electrolytic liquid and tabs; the positive electrode sheet is made by coating the positive electrode slurry prepared by the pre-sanding process; the negative electrode sheet is made by coating the negative electrode slurry prepared by the pre-sanding process; each cell includes Positive pole lug and negative pole lug, the positive pole lug is made of aluminum alloy with a purity greater than 99%, the width is 30mm, and the thickness is 0.20mm, the negative pole lug is made of nickel-plated copper material, the width is 30mm, and the thickness is 0.20mm; the positive electrode slurry The coating surface density is 170 g / ㎡; the negative electrode slurry coating surface density is 90 g / ㎡.

[0024] The above-mentioned pos...

Embodiment 3

[0027] The power energy storage polymer lithium-ion battery of this embodiment is made of four winding cells connected in parallel and then packaged with aluminum-plastic film; each cell includes a positive electrode piece, a separator, a negative electrode piece, an electrolytic liquid and tabs; the positive electrode sheet is made by coating the positive electrode slurry prepared by the pre-sanding process; the negative electrode sheet is made by coating the negative electrode slurry prepared by the pre-sanding process; each cell includes Positive pole lug and negative pole lug, the positive pole lug is made of aluminum alloy with a purity greater than 99%, the width is 40mm, and the thickness is 0.25mm, the negative pole lug is made of nickel-plated copper material, the width is 40mm, and the thickness is 0.25mm; the positive electrode slurry The coating surface density is 150 g / ㎡; the negative electrode slurry coating surface density is 75 g / ㎡.

[0028] The above-mentioned...

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Abstract

The invention discloses a power energy storage polymer lithium ion battery. The power energy storage polymer lithium ion battery is formed by connecting 2-5 winding interiors of battery cells in parallel and performing aluminum-plastic film package, wherein each battery cell comprises a positive pole plate, a separator, a negative pole plate and tabs, the positive pole plate is obtained by coating of positive paste, the positive paste is prepared by a pre-sanding process, the negative pole plate is obtained by coating of negative paste, the negative paste is prepared by the pre-sanding process, and each battery cell comprises a positive tab and a negative tab. By the battery, the battery internal resistance can be effectively reduced, the rate discharge performance of the battery is improved, meanwhile, the battery has high production efficiency, and the production cost of the battery is reduced; a carbon nanotube / carbon black composite conductive agent with dispersed positive electrode material nanoparticles is contained, the content of the conductive agent can be reduced, the content of an active substance is increased, so that the volume energy density of the battery is improved; and a three-dimensional conductive network structure can be effectively covered and formed on a surface of a positive electrode material lithium iron phosphate with micro-scale secondary particles, so that the inclination / declination distance of lithium ions is greatly shortened, the polarization is reduced, and the rate discharge performance, the cycle property and the safety performance of the battery are improved.

Description

technical field [0001] The invention relates to the technical field of polymer lithium ion batteries, in particular to a power energy storage polymer lithium ion battery. Background technique [0002] Because the power energy storage polymer lithium-ion battery has the advantages of high energy density, wide voltage working range, high power, good rate discharge performance, long cycle life, good safety, no memory effect, etc., it has been rapidly developed in recent years for electric vehicles, Small and medium-sized energy storage systems such as electric bicycles, electric tools, power supply systems for national defense and military equipment, photovoltaic energy storage systems, energy storage peak-shifting power stations, uninterruptible backup power supplies, and home energy storage systems have broad market and application prospects. [0003] At present, the general power energy storage polymer lithium-ion battery mainly has three structures: (1) Lamination form, whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M2/26H01M10/0525H01M4/62H01M4/58H01M4/139
CPCH01M4/139H01M4/5825H01M4/625H01M10/0525H01M10/0587H01M50/531Y02E60/10Y02P70/50
Inventor 刘小虹李国敏李露
Owner SHENZHEN GPC ENERGY GRP CO LTD
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