High-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 problems such as 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: 2014-03-12
HEBEI JIESHEN NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment 1

[0041] A large-capacity pulse type power lithium-ion battery, including a casing 1, a battery core, and an electrolyte solution 2 accommodated 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 electrodes 4 are inserted between the electrodes 3 of the lithium battery at intervals.

[0042] The battery of the present invention is further explained as follows: 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 s...

preparation example 1

[0048] (1) Lithium-ion electrode slurry preparation:

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

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

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

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

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

[0054] (3) Sheet production: Use a coating machine to transfer the prepared positive and negative electrode slu...

preparation example 2

[0060] (1) Lithium-ion electrode slurry preparation:

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

[0062] The weight composition of negative electrode slurry: mesophase carbon 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 negative electrode slurry: three-dimensional hierarchical porous carbon 89%, KS-6 graphite 8.2%, hydroxymethyl cellulose sodium 0.8%, styrene-butadiene rubber 2.0%;

[0066] (3) Sheet production: Use a coating machine to transfer the prepared positi...

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Abstract

The invention discloses a high-capacity pulse type power lithium ion battery and a preparation method thereof, and belongs to the technical field of lithium ion batteries. The high-capacity pulse type power lithium ion battery comprises a shell, a battery core and electrolyte accommodated in the shell, wherein the battery core comprises a plurality of lithium battery electrodes, and further comprises double-electrode-layer absorption electrodes; the double-electrode-layer absorption electrodes are inserted among the lithium battery electrodes at intervals. The preparation method comprises the steps of: (1) preparing lithium ion electrode slurry; (2) preparing double-electrode-layer absorption electrode slurry; (3) slicing; (4) laminating; (5) assembling; (6) injecting. The high-capacity pulse type power lithium ion battery and the preparation method thereof organically combine the lithium ion intercalation-deintercalation energy storage mechanism with the double-electrode-layer adsorption-desorption energy storage mechanism, so that the pulse discharge characteristic of the lithium ion battery is modified, the energy density and power density are higher, damage to the battery from the high-power pulse discharge is avoided, and the service life of the battery is largely prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries. Background technique [0002] Lithium cobalt oxide lithium-ion battery, lithium manganese oxide lithium-ion battery, lithium vanadium phosphate lithium-ion battery and lithium iron phosphate lithium-ion battery are mainly used in electric bicycles, electric vehicles, computers, mobile phones, etc. The application method is: the purpose of connecting batteries in series and parallel to change their voltage and capacity to provide power. Because the lithium ion back-and-forth migration mechanism can achieve better ion transfer, its cycle number can reach more than 500 times, and its energy density is much higher than that of lead-acid batteries. At the same time, it has the characteristics of environmental friendliness, so it is widely used. in various fields. [0003] However, on the basis of satisfying the mileage of the car, the power lithium-ion battery can cause great damage to...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/058
CPCY02E60/122H01M10/0445H01M10/0525H01M10/058Y02E60/10Y02P70/50
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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