Total temperature-range lithium ion battery

A lithium-ion battery and temperature domain technology, applied in secondary batteries, battery pack components, non-aqueous electrolyte battery electrodes, etc., can solve problems such as inconvenience to consumers and rising costs, avoid safety accidents, and improve high-temperature resistance , the effect of excellent high temperature impact resistance

Active Publication Date: 2013-09-25
余玉英 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] According to the specific design and manufacture of lithium-ion batteries according to the operating temperature environment, the safe use of lithium-ion batteries under specific conditions can be solved. However, for mobile vehicles and equipment, battery applications in the military and aerospace fields require lithium-ion batteries It has a wide range of operating temperatures, such as lithium-ion batteries used in electric vehicles and hybrid vehicles. Electric vehic

Method used

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Examples

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Embodiment 1

[0036] The making of composite multi-layer coated positive pole sheet: 94 parts of positive electrode material LiMn2O4 and 3 parts of acetylene black, 3 parts of binder polyvinylidene fluoride (hereinafter referred to as PVdF) are mixed, and the above-mentioned mixed powder Disperse the material into N-methyl-2-pyrrolidone (hereinafter referred to as NMP), stir and mix to form positive electrode slurry A; configure the positive electrode material ternary nickel-cobalt-aluminum material according to the above-mentioned ratio of positive electrode slurry A to form positive electrode slurry B: Using the positive electrode material high-voltage lithium nickel manganese oxide according to the ratio of the positive electrode slurry A, configure the positive electrode slurry C. First, apply the positive electrode slurry C to both sides of the positive electrode current collector aluminum foil with a thickness of 20um by scraping, roller coating or gravure coating. The thickness of the...

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Abstract

The invention provides a total temperature-range lithium ion battery. The total temperature-range lithium ion battery comprises a multi-tab anode piece having a compound multi-layer coating structure, a multi-tab cathode piece having a compound multi-layer coating structure, a high temperature-resistant diaphragm and a high/low temperature composite electrolyte. Each one of two sides of a part 4 on positive and negative current collectors is orderly coated with a rapid charging/discharging layer 1 (1a, 1b), a transition layer 2 (2a, 2b) and a slow charging/discharging layer 3 (3a, 3b). Through the structure, the total temperature-range lithium ion battery has rapid charging/discharging performances without battery energy density reduction. Through the multi-tab structure, the high temperature-resistant diaphragm and the high/low temperature composite electrolyte, battery ohmic resistance and electrochemical interface impedance are reduced and battery safety is improved. The total temperature-range lithium ion battery can realize normal charging and discharging at a temperature of -40 to 75 DEG C and has excellent low-temperature high-magnification characteristics and high-temperature and long-life performances.

Description

technical field [0001] The invention relates to a lithium-ion battery, a full-temperature-range lithium-ion battery that can be used for normal charging and discharging within the temperature range of -40°C to 75°C. The battery uses a multi-tab positive electrode with a composite multi-layer coating structure The pole piece, the multi-pole negative pole piece and the high temperature resistant diaphragm are assembled, and the high and low temperature composite electrolyte is used as the electrolyte, which effectively expands the normal operating temperature range of the lithium ion battery and solves the safety problem of the lithium ion battery at low temperature And the shortcoming of poor cycle life when used at high temperature. technical background [0002] Lithium-ion batteries have developed rapidly in the past two decades, and have completely replaced traditional nickel-metal hydride batteries and nickel-cadmium batteries in the fields of portable communications and ...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M2/18H01M10/0567H01M2/26H01M50/463H01M50/489H01M50/491H01M50/533
CPCY02E60/10
Inventor 余玉英李建华
Owner 余玉英
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