Large-capacity pulse type power lithium-ion battery and preparation method thereof

A lithium-ion battery, pulse-type technology, applied in the field of lithium-ion batteries, can solve the problems of affecting battery life, low energy density, battery damage, etc., to achieve improved energy storage capacity, high energy density and power density, and avoid damage Effect

Inactive Publication Date: 2016-09-14
HEBEI JIESHEN NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, on the basis of the power lithium-ion battery meeting the mileage of the car, when the car starts, accelerates, and climbs a slope under various road conditions, the high-power use of the battery pulse discharge will cause great damage to the battery itself, seriously affecting the battery. service life
[0004] The electric double layer adsorption-desorption energy storage battery has a high power density and can be discharged in a short period of time. It can meet the needs of starting, accelerating and climbing a car under different road conditions, but its energy density is low, so its use is limited. limit

Method used

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  • Large-capacity pulse type power lithium-ion battery and preparation method thereof
  • Large-capacity pulse type power lithium-ion battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A large-capacity pulse-type power lithium ion battery, comprising a casing 1, a battery core, and an electrolyte 2 contained in the casing 1. The battery core includes a plurality of lithium battery electrodes 3, and the battery core also includes an electric double layer adsorption electrode 4. The electric double layer adsorption electrode 4 is inserted between the lithium battery electrodes 3 at intervals.

[0042] The battery of the present invention is further explained as: an electric double layer adsorption electrode 4 is inserted every 5-15 lithium battery electrodes 3.

[0043] The battery of the present invention is further explained as: the lithium battery electrode 3 and the electric double layer adsorption electrode 4 are connected in parallel.

[0044] The battery of the present invention is further explained as: the lithium battery electrode 3 and the electric double layer adsorption electrode 4 include positive and negative substrates, and the slurry coated on ...

preparation example 1

[0048] (1) Preparation of lithium ion electrode slurry:

[0049] The weight composition of the positive electrode slurry: 90% lithium iron phosphate, 2.5% super-P, 1% sodium hydroxymethyl cellulose, 6.5% styrene butadiene rubber;

[0050] The weight composition of the negative electrode slurry: graphite 92%, super-P 1%, sodium hydroxymethyl cellulose 1% and styrene butadiene rubber 6%;

[0051] (2) Preparation of electric double layer adsorption electrode slurry

[0052] The weight composition of the positive electrode slurry: 90% three-dimensional layered porous carbon, 0.5% multi-walled carbon nanotubes, 1.5% sodium hydroxymethyl cellulose and 8% styrene butadiene rubber;

[0053] The weight composition of the negative electrode slurry: three-dimensional layered porous carbon 85%, KS-6 graphite 10%, sodium hydroxymethyl cellulose 1.0%, styrene butadiene rubber 4.0%;

[0054] (3) Sheet making: transfer the prepared positive and negative slurry to the positive and negative substrates wit...

preparation example 2

[0060] (1) Preparation of lithium ion electrode slurry:

[0061] The weight composition of the positive electrode slurry: 93% lithium cobaltate, 3% acetylene black, 0.5% sodium hydroxymethyl cellulose, 3.5% styrene butadiene rubber;

[0062] The weight composition of the negative electrode slurry: mesocarbon microspheres 96%, super-P 1%, sodium hydroxymethyl cellulose 0.5% and styrene butadiene rubber 2.5%;

[0063] (2) Preparation of electric double layer adsorption electrode slurry

[0064] The weight composition of the positive electrode slurry: 93% three-dimensional hierarchical porous carbon, 2% multi-walled carbon nanotubes, 1% sodium hydroxymethyl cellulose and 4% styrene butadiene rubber;

[0065] The weight composition of the negative electrode slurry: 89% three-dimensional layered porous carbon, 8.2% KS-6 graphite, 0.8% sodium hydroxymethyl cellulose, 2.0% styrene butadiene rubber;

[0066] (3) Sheet making: transfer the prepared positive and negative slurry to the positive and...

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Abstract

The invention discloses a large-capacity pulse-type power lithium-ion battery and a preparation method thereof, belonging to the technical field of lithium-ion batteries. It includes a shell, a battery core, and an electrolyte contained in the shell. The battery core includes a plurality of lithium battery electrodes. The battery core also includes electric double layer adsorption electrodes, and the electric double layer adsorption electrodes are inserted between the lithium battery electrodes at intervals. The preparation method includes: (1) preparation of lithium ion electrode slurry; (2) preparation of electric double layer adsorption electrode slurry; (3) sheet making; (4) lamination; (5) assembly; (6) liquid injection. The invention organically combines the lithium ion intercalation and desorption energy storage mechanism with the electric double layer adsorption and desorption energy storage mechanism, improves the pulse discharge characteristics of the lithium ion battery, has higher energy density and power density, and avoids the impact of high power pulse discharge on the battery. Cause damage, greatly prolonging the service life of the battery.

Description

Technical field [0001] The invention relates to the technical field of lithium ion batteries. Background technique [0002] The application areas of lithium cobalt oxide lithium ion batteries, lithium manganese oxide lithium ion batteries, vanadium phosphate lithium lithium ion batteries and lithium iron phosphate lithium ion batteries are mainly electric bicycles, electric vehicles, computers, mobile phones, etc. The application method is: series and parallel batteries change their voltage and capacity to provide power. Because the lithium ion round trip mechanism can achieve better ion transfer, its cycle times can reach more than 500 times, and its energy density is much higher than that of lead-acid batteries, and it is environmentally friendly, so it is widely used In various fields. [0003] However, on the basis of meeting the mileage of the car, the high-power use of the battery pulse discharge when the car starts, accelerates and climbs under various road conditions will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M10/058
CPCH01M10/0445H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 胡俊平任云王建森李书华杜立军张浩
Owner HEBEI JIESHEN NEW ENERGY TECH
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