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Laminated secondary cell

A secondary battery, laminated technology, applied in the direction of secondary batteries, secondary battery manufacturing, small flat batteries/batteries, etc., can solve problems such as increased assembly process, reduced battery active material, short circuit, etc., to achieve reliability big effect

Inactive Publication Date: 2002-10-02
ENVISION AESC ENERGY DEVICES LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a long collector tab is used, there is a possibility of a short circuit caused by contact between collector tabs with different polarities, or contact between a collector tab and an electrode with a different polarity.
Especially in batteries used as mobile power sources, external vibrations and shocks are more likely to cause short circuits
[0014] In order to prevent a short circuit with the current collecting tab, it is conceivable to cover the current collecting tab with an insulating material, but because the insulating material is used to cover the current collecting tab, the assembly process increases, and the battery in the battery container The amount of active material is relatively reduced, which is problematic for batteries with high energy density

Method used

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Examples

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Embodiment 1

[0111] 92 parts by weight of lithium manganate (Li 1+x mn 2-x o 4 ) powder, 5 parts by weight of carbon black, the mixture of polyvinyl fluoride composition of 3 parts by weight, coating and drying on aluminum foil, after carrying out rolling compounding, the positive electrode that integrally forms positive electrode collector tab is long 120mm, wide 65mm, 200μm in thickness, 10mm in width of the positive electrode current collector tab, arrange separators of 125mm in length, 70mm in width, and 30μm in thickness on both sides of the positive electrode, and thermally weld their surroundings to make a separator cover positive electrode.

[0112] Furthermore, a mixture of 91 parts by weight of graphitized meso-carbon glass beads (MCMB manufactured by Osaka Gas), 1 part by weight of carbon black, and 8 parts by weight of polyvinyl fluoride was applied and dried on the copper foil. After rolling and compounding, a negative electrode integrally formed with the negative electrode...

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Abstract

To provide a stacked type secondary battery in which positive electrodes and negative electrodes facing each other can be correctly positioned, and in a stacked type secondary battery in which positive electrodes and negative electrodes having different areas are stacked facing each other through separators, the area is small. There is an equal interval between the electrodes and the outer periphery of the separator body, and they are arranged in the central part and covered by the separator body. same size.

Description

[0001] invention technical field [0002] The present invention relates to a stacked secondary battery, and more particularly to a stacked secondary battery in which a plurality of positive electrodes and negative electrodes are stacked through a separator, and the collector tabs of the respective positive electrodes and the collector tabs of the negative electrodes are connected in parallel. Electrical connectors. Background technique [0003] Various secondary batteries have been known, but applications of non-aqueous electrolyte batteries such as lithium-ion batteries have been developed as batteries with high energy density. [0004] In a non-aqueous electrolyte battery, a cylindrical battery in which a cylindrical battery element manufactured by winding a strip-shaped positive electrode and a negative electrode through a separator is housed in a battery case, or a battery element manufactured by winding is flattened and hou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/05H01M10/0585H01M10/34H01M50/466H01M50/54
CPCH01M10/0436H01M10/0525H01M10/058H01M2004/021Y02E60/10H01M50/54Y02P70/50H01M50/466
Inventor 渡边英人最上克一茂木永子
Owner ENVISION AESC ENERGY DEVICES LTD
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