Apparatus and method of manufacturing electrodes, and battery

A manufacturing method and electrode technology, applied in electrode manufacturing, electrode collector coating, non-aqueous electrolyte storage battery, etc., can solve the problems of reduced heat dissipation, inability to fully utilize, and reduced safety

Inactive Publication Date: 2007-01-31
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the filling density of the active material as described above is increased, since the penetration of the electrolyte into the electrode is greatly reduced, a local reaction occurs, especially the problem of lithium being deposited on the surface of the negative electrode, or the electrolyte The convection deteriorates and the inside of the electrode is full of heat, which reduces the heat dissipation. There is a tendency that the function cannot be fully exerted, and the safety reduction becomes a problem.

Method used

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  • Apparatus and method of manufacturing electrodes, and battery
  • Apparatus and method of manufacturing electrodes, and battery
  • Apparatus and method of manufacturing electrodes, and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0085] [Preliminary experiment 1]

reference example 1

[0087] After applying the first layer of positive electrode active material slurry on both sides of the aluminum foil as the positive electrode current collector by the doctor blade method, except for drying the slurry, a battery was fabricated in the same manner as in the best mode for carrying out the above-mentioned invention. .

[0088] The battery thus fabricated is hereinafter referred to as a reference battery Q1.

reference example 2

[0090] Batteries were produced in the same manner as in Reference Example 1 above, except that the positive electrode active material layer had a one-layer structure instead of a two-layer structure (a mixture of LCO and LFP was used as the positive electrode active material).

[0091] The battery produced in this way is hereinafter referred to as a reference battery Q2.

[0092] (experiment)

[0093] Table 1 shows the results of investigations on the overcharge characteristics of the above-mentioned reference batteries Q1 and Q2. In addition, the experimental conditions are the following conditions: set 750mA as 1.0It, set the overcharge current to 1.0It, 2.0It, 3.0It, 4.0It respectively, and use the time when the battery voltage reaches 12V to charge at a constant voltage (there is no current lower limit ) circuit, after reaching 12V, conduct a charging test until 3 hours have elapsed.

[0094] In addition, in ordinary batteries (battery packs), protection elements such as...

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Abstract

The object of the present invention is to provide an electrode manufacturing method, a manufacturing device, and a battery. It is possible to suppress the reduction in battery performance during normal charging and discharging due to the increase in the internal resistance of the electrode, and at the same time to improve the overcharge characteristics, and to suppress the occurrence of deviation between the active material layers and the adhesion between the active materials. reduce, or increase manufacturing costs. Two active material layers ( 2, 3) In the electrode manufacturing method, the above-mentioned plurality of active material slurries are sequentially laminated and coated on the surface of the current collector in a wet state, and then all the active material slurries are dried.

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte battery such as a lithium ion battery or a polymer battery, a method for manufacturing an electrode used in the battery, and an apparatus for manufacturing an electrode used in the manufacturing method. Background technique [0002] In recent years, mobile information terminals such as mobile phones, notebook personal computers, and PDAs have been rapidly reduced in size and weight, and batteries that serve as driving power sources have been required to have higher capacities. Nonaqueous electrolyte batteries, which are charged and discharged by moving lithium ions between the positive and negative electrodes along with charging and discharging, have high energy density and high capacity, and are therefore widely used as driving power sources for mobile information terminals as described above. In addition, the recent use of its characteristics is not limited to mobile office applications such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04B05D1/00H01M4/02H01M4/58H01M10/40H01M4/13H01M4/131H01M4/136H01M4/139H01M4/1391H01M4/1397H01M4/36H01M10/05
CPCH01M4/5825B05C5/0254H01M4/525B05D7/52H01M4/36H01M4/0404B05D1/26H01M4/621H01M4/1391Y02E60/122B05C9/06B05D2252/02H01M10/052H01M4/366H01M4/131Y02E60/10H01M4/04
Inventor 井町直希藤本洋行藤谷伸
Owner SANYO ELECTRIC CO LTD
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