Power storage assembly and gasket
AssigneeDaikin Industries, Ltd.
InventorsTadaharu Isaka, Hayato Tsuda, Yumi Zenke, Yukari Yamamoto, Takahisa Aoyama
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Abstract
A power storage assembly having a gasket containing a copolymer containing a tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit, wherein the copolymer has a content of the fluoro(alkyl vinyl ether) unit of 2.0 to 6.0% by mass with respect to the whole of the monomer units, a melt flow rate of 0.5 to 55 g/10 min, and the number of functional groups of 50 or less per 106 main-chain carbon atoms.
Claims13
A nonaqueous electrolyte battery comprising a gasket containing a copolymer containing a tetrafluoroethylene unit and a perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of the perfluoro(propyl vinyl ether) unit of 2.0 to 6.0% by mass with respect to the whole of the monomer units, a melt flow rate of 0.5 to 55 g/10 min, and the number of functional groups of 50 or less per 106 main-chain carbon atoms.
A method for sealing a nonaqueous electrolyte battery, the nonaqueous electrolyte battery comprising an exterior can, an electric element housed in the exterior can, a lid to close an opening of the exterior can, and an external terminal installed on the lid, the method comprising:
- disposing the gasket between the external terminal and the lid to prevent leakage and diffusion of an electrolytic solution to an outside of the nonaqueous electrolyte battery,
- wherein the gasket comprises a copolymer containing a tetrafluoroethylene unit and a perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of the perfluoro(propyl vinyl ether) unit of 2.0 to 6.0% by mass with respect to the whole of the monomer units, a melt flow rate of 0.5 to 55 g/10 min, and the number of functional groups of 50 or less per 106 main-chain carbon atoms.
Dependencies are inferred from the claim text.