Thin battery
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHisashi Shiota, Tetsuhide Yokoyama, Shigeru Aihara, Syo Shiraga
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Abstract
A thin battery includes a flat battery body having a positive electrode and a negative electrode having an electrolyte layer disposed between the electrodes. A flexible encapsulating bag seals the battery body with a sealing portion. A positive electrode collector tab and a negative electrode collector tab are respectively connected to the positive and negative electrodes. The tabs penetrate the encapsulating bag. At least one of the tabs includes first and second collector tabs and a safety device so that an electrical connection between the first and second collector tabs may be interrupted when the internal pressure of the encapsulating bag exceeds a predetermined value.
Claims21
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.
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 and negative electrode collector tab comprises a first collector tab connected to the electrode and a second collector tab, said first and second collector tab being made of a material which deforms with the rise in the ambient temperature 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 when the inner pressure of said encapsulating bag exceeds a predetermined value using expansion deformation of said encapsulating bag and when the temperature rises due to the passage of excessive current.
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 said sealing portion comprises a section to give an expected rupture point from expansion deformation of said encapsulating bag.
Dependencies are inferred from the claim text.