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Film packed nonaqueous electrolyte battery with improved surface treated lead terminal

A non-aqueous electrolyte and lead terminal technology, which can be used in the manufacture of non-aqueous electrolyte batteries, aqueous electrolyte batteries, and electrolyte batteries, etc., can solve the problems of surface corrosion of lead terminals, decreased adhesion of sealant layers and lead terminals, etc.

Inactive Publication Date: 2002-09-18
NEC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, it is generally difficult to obtain strong adhesion between a metal surface and a polymer resin surface
Second, lithium salts of inorganic fluorides such as LiPF 6 Electrolyte salt that has been commonly used as a non-aqueous electrolyte and tends to decompose to produce a hydrofluoric acid that can corrode metals, so the surface of the lead terminal is corroded, resulting in a decrease in the adhesion between the sealant layer and the lead terminal

Method used

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  • Film packed nonaqueous electrolyte battery with improved surface treated lead terminal
  • Film packed nonaqueous electrolyte battery with improved surface treated lead terminal
  • Film packed nonaqueous electrolyte battery with improved surface treated lead terminal

Examples

Experimental program
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Embodiment approach

[0054] A preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. figure 1 is a schematic perspective view of a film-sealed non-aqueous electrolyte battery in a preferred embodiment of the present invention. figure 2 are instructions along the figure 1 The cross-sectional front view of the film-encapsulated non-aqueous electrolyte battery taken along line A-A' of . image 3 are instructions along the figure 1 The enlarged fragmentary cross-sectional front view of the film-encapsulated non-aqueous electrolyte battery taken along line B-B' of .

[0055] The film-encapsulated non-aqueous electrolyte battery mainly includes a battery element 4 and a membrane case 5 sealing the battery element 4 . The battery element 4 includes a nonaqueous electrolyte, a positive electrode, a negative electrode, and a separator. The film case 5 further includes a laminated structure of a sealant polymer resin film 1, a me...

Embodiment 1

[0093] Lithium manganese oxide powder with spinel structure, carbon donor for generating electrical conductivity, and polyvinylidene fluoride are blended in a weight ratio of 90:5:5 to form N-methylpyrrolidone (hereinafter referred to as NMP ). The NMP is then stirred to form a slurry comprising NMP. The amount of NMP is adjusted according to the viscosity of the slurry. The slurry was uniformly applied onto the first surface of a 20-micrometer-thick aluminum foil serving as a positive electrode collector using a doctor blade, followed by drying at 100° C. for 2 hours under vacuum pressure. The slurry was additionally applied to the second surface of the aluminum foil, followed by drying under vacuum pressure. The sample was then wound and pressed to form a positive electrode active material layer. The theoretical capacity is 600mAh.

[0094] Amorphous carbon powder and polyvinylidene fluoride were blended at a weight ratio of 91:9 to form N-methylpyrrolidone (hereinafter ...

Embodiment 2

[0101] Lithium manganese oxide powder with spinel structure, carbon donor for generating electrical conductivity, and polyvinylidene fluoride are blended in a weight ratio of 90:5:5 to form N-methylpyrrolidone (hereinafter referred to as NMP ). The NMP is then stirred to form a slurry comprising NMP. The amount of NMP is adjusted according to the viscosity of the slurry. The slurry was uniformly applied onto the first surface of a 20-micrometer-thick aluminum foil serving as a positive electrode collector using a doctor blade, followed by drying at 100° C. for 2 hours under vacuum pressure. The slurry was additionally applied to the second surface of the aluminum foil, followed by drying under vacuum pressure. The sample was then wound and pressed to form a positive electrode active material layer. The theoretical capacity is 600mAh.

[0102] Amorphous carbon powder and polyvinylidene fluoride were blended at a weight ratio of 91:9 to form N-methylpyrrolidone (hereinafter ...

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Abstract

A membrane-sealed non-aqueous electrolyte battery includes: a battery element including a non-aqueous electrolyte; a membrane casing having at least one sealant polymer resin film for sealing the battery element; at least one membrane extending from the battery element and being The lead terminal protruding from the film case, and the lead terminal having one surface has a contact area that directly contacts the encapsulant polymer resin film, and at least the contact area of ​​the surface of the lead terminal is coated There is an anti-corrosion coating film, wherein the anti-corrosion coating film includes: (A) a polymer having a phenolic compound structural unit, and at least a part of the structural unit includes a substituent containing an amino group or a substituted amino group; (B) a phosphate compound; and (C) titanium fluoride compounds.

Description

field of invention [0001] The present invention relates to a battery, and more particularly to a membrane-sealed nonaqueous electrolyte battery comprising a nonaqueous electrolyte solution. Background of the invention [0002] There is an increasing demand for downsizing of various electronic devices. The importance of reducing the size of batteries to achieve their size reduction is also increasing. Effectively, the battery elements used to generate power are housed in a thin film casing, such as a laminated film casing. [0003] Laminated membrane casings include laminates of metal foil or sealed polymer resin layers. The laminated film case can be heated to seal the battery element. In order to insulate the battery element from the atmosphere and prevent leakage of the electrolyte of the battery element, it is necessary to seal the sealing portion of the laminated film case with high reliability. [0004] Such sealing reliability is particularly important for batterie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/571C23C22/36H01M6/10H01M10/05H01M10/052H01M10/0566H01M10/0568H01M10/058H01M50/105H01M50/55H01M50/553H01M50/562H01M50/566H01R13/52
CPCC23C22/36H01M10/0525H01M2006/106H01R13/5216Y02E60/10H01M50/124Y02P70/50H01M50/562H01M50/105H01M50/55H01M50/553H01M50/566
Inventor 屋田弘志河合英正白方雅人高嶋哲也小嶋育央大山宣英饭塚浩之
Owner NEC CORP
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