Patent ID: 6187472
Filing Date: 2001-02-13
Classification: H01M,Y02E,Y02P

Abstract:
A thin battery comprising a flat battery body having a positive electrode and a negative electrode laminated with an ionically-conducting layer provided interposed therebetween, a flexible encapsulating bag for sealing said battery body with a sealing portion, and a positive electrode collector tab and a negative electrode collector tab connected to said positive electrode and said negative electrode, respectively, and penetrating a part of said encapsulating bag to make an electrical input/output, wherein at least one of said positive electrode collector tab and negative electrode collector tab comprises a first collector tab connected to the electrode and a second collector tab and a safety device is provided comprising a means for retaining electrical connection between said first collector tab and said second collector tab and a means which releases said retaining means using expansion deformation of said encapsulating bag when the inner pressure of said encapsulating bag exceeds a predetermined value.