Film packaged battery

Patent metadata

Field	Value
Publication number	US-2018175451-A1
Application number	US-201615576073-A
Country	US
Kind code	A1
Filing date	Jun 3, 2016
Priority date	Jun 4, 2015
Publication date	Jun 21, 2018
Grant date	—

Abstract

A film package battery 1 has a battery element ( 20 ) having a positive electrode, a negative electrode and a separator that are stacked or wound, wherein, at least at 200° C., the separator does not melt or soften and has a heat shrinkage ratio of 3% or less; a film package ( 10 ) enclosing the battery element; and a fixing tape ( 70 ) fixed to a part of the battery element and fixed to an inner surface of the film package.

First claim

1 . A film package battery comprising:
a battery element having a positive electrode, a negative electrode and a separator that are stacked or wound, wherein, at least at 200° C., the separator does not melt or soften and has a heat shrinkage ratio of 3% or less; a film package enclosing the battery element; and a fixing tape fixed to a part of the battery element and fixed to an inner surface of the film package.

2 . The film package battery according to claim 1 , wherein the fixing tape and the inner surface of the film package are fixed by fusion bonding.

3 . The film package battery according to claim 1 , wherein the separator is formed of at least one of a polyimide resin, a polyamide resin, and a polyphenylene sulfone resin.

4 . The film package battery according to claim 1 , wherein the fixing tape has a multilayer structure comprising
a fusion bondable layer, and a heat resistant layer having a melting point higher than a melting point of the fusion bondable layer by 10° C. or more.

5 . The film package battery according to claim 1 , wherein the fixing tape has a multilayer structure comprising a composite layer, and
the composite layer is obtained by impregnating a fiber with the fusion bondable layer, the fiber having a melting point higher than the melting point of the fusion bondable layer by 10° C. or more.

6 . The film package battery according to claim 4 , wherein the fixing tape comprises, as the fusion bondable layer,
a first fusion bondable layer fixed to an inner surface of the film package, and a second fusion bondable layer fixed to the battery element.

7 . The film package battery according to claim 4 , wherein the melting point of the fusion bondable layer is lower than a melting point of the separator.

8 . The film package battery according to claim 4 , wherein the fixing tape further comprises
a pressure-sensitive adhesive layer for attaching the fixing tape to the battery element before fusion bonding.

Assignees

• Nec Corp

Inventors

• Inoue Kazuhiko
• Otohata Makihiro
• Sudo Shinya

Classifications

• H01M10/0587

  of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators · CPC title

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M50/14

  for protecting against damage caused by external factors · CPC title

• H01M50/423

  Polyamide resins · CPC title

• H01M50/126

  comprising three or more layers · CPC title