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Lithium ion battery

A lithium-ion battery, battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of reducing the effective utilization rate of batteries, increasing the cost of automobiles, increasing the cost of batteries, etc., achieving low cost, simple production, good safety performance effect

Inactive Publication Date: 2008-01-30
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] As mentioned above, for lithium-ion batteries used in hybrid electric vehicles, it is first necessary to meet the requirements of high power and high energy for vehicles. High power and high energy correspond to the increase in battery size, and the increase in battery weight and volume reduces the effective utilization of the battery. , but also increased the cost of the battery, the increase in battery cost led to an increase in the cost of the car

Method used

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  • Lithium ion battery

Examples

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Embodiment 1

[0032] As shown in Figure 1, the lithium ion battery of the present invention is made of battery case 1, positive electrode sheet 801, negative electrode sheet 803, diaphragm 802, non-aqueous organic electrolyte; Manufacturing process is as follows:

[0033] 1. Preparation of pole piece and diaphragm

[0034] Preparation of positive electrode sheet: 75 parts (weight percent) of lithium cobaltate, 15 parts (weight percent) of graphite powder, 10 parts (weight percent) of binder (PVDF) are premixed and then N-methylpyrrolidone (NMP) is added to fully Stir evenly, adjust the solid-liquid ratio to make the viscosity suitable for coating, and evenly coat the slurry on both sides of the aluminum foil on the coating machine, and roll, cut and dry the coated pole piece. The final size of the pole piece is 750×230mm, a total of 8 pieces. Fix 8 pieces of positive electrodes on the positive pole.

[0035] Preparation of the negative plate: premix 80 parts (weight percent) of mesophase ...

Embodiment 2

[0042] The battery structure in Example 2 is the same as that in Example 1.

[0043] 1. Preparation of pole piece and diaphragm:

[0044] Preparation of positive electrode sheet: 80 parts (weight percent) of lithium cobaltate, 10 parts (weight percent) of acetylene black, 10 parts (weight percent) of binder (PVDF) are premixed and then N-methylpyrrolidone (NMP) is added to fully Stir evenly, adjust the solid-liquid ratio to make the viscosity suitable for coating, and evenly coat the slurry on both sides of the aluminum foil on the coating machine, and roll, cut and dry the coated pole piece. The final size of the pole piece is 748×228mm, a total of 8 pieces. Fix 8 pieces of positive electrodes on the positive pole.

[0045] Preparation of the negative plate: 90 parts (weight percent) of mesophase carbon microspheres (MCMB), 3 parts (weight percent) of graphite powder, 2 parts (weight percent) of composite graphite (KS-6), binder (PVDF) 5 parts (percentage by weight) are pr...

Embodiment 3

[0051] The battery structure in Example 3 is also the same as the battery in Example 1.

[0052] 1. Preparation of pole piece and diaphragm:

[0053] Preparation of positive electrode sheet: premix 85 parts (weight percent) of lithium manganate composite, 10 parts (weight percent) of acetylene black, 5 parts (weight percent) of binder (PVDF) and add N-methylpyrrolidone (NMP) Stir fully and evenly, adjust the solid-liquid ratio to make the viscosity suitable for coating, evenly coat the slurry on both sides of the aluminum foil on the coating machine, and roll, cut and dry the coated pole piece. The final size of the pole piece is 750×230mm, a total of 8 pieces. Fix 8 pieces of positive electrodes on the positive pole.

[0054] Preparation of the negative plate: 95 parts (weight percent) of mesophase carbon microspheres (MCMB), 2 parts (weight percent) of graphite powder, 1 part (weight percent) of composite graphite (KS-6), binder (PVDF) 2 parts (percentage by weight) are p...

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Abstract

Lithium ion battery is composed of wrapped core, electrolyte and battery container. The said core includes positive and negative pole ears, terminals and wrapped core layer enwound on the terminals. Positive and negative external ends are positioned on two ends of battery container. Superposing and winding several layers of positive plates, diaphragms and negative plates form the said wrapped core layer. Positive pole ear and positive terminal constitute a positive pole, and negative pole ear and negative terminal constitute a negative pole. Features of the invention are: low internal resistance, high power, high energy, good safety, low cost and easy fabricating.

Description

technical field [0001] The invention relates to a battery, in particular to a high-power lithium-ion battery for a hybrid electric vehicle. Background technique [0002] With the development of the automobile industry, the number of automobiles in the world has increased rapidly. The increase in car ownership has not only promoted economic and social development, but also exacerbated social problems such as shortage of oil resources and deterioration of the ecological environment. Energy conservation and environmental protection have become two major themes in the development of automobile technology. Hybrid electric vehicles, which are the transitional models of electric vehicles to replace traditional internal combustion locomotives, are the current development trend of the automobile industry. Since vehicle batteries are the core technology for the development of hybrid electric vehicle technology, with the advent of the upsurge of research and development of hybrid elect...

Claims

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Application Information

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IPC IPC(8): H01M10/38H01M10/40
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 卢世刚吴国良庞静黄松涛刘人敏金维华李明勋阚素荣蔡振平李文忠张刚杜纪磊付翠琴
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD