Heat insulation sheet, method for producing same, and secondary battery in which same is used
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorYuuichi Abe
Life of this patent
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Abstract
A heat insulation sheet includes a fiber sheet, a resin layer provided on a surface of an outer peripheral portion of the fiber sheet, and a silica xerogel disposed in spaces of the fiber sheet. The fiber sheet includes fibers forming spaces among the fibers. The resin layer is denser than the fiber sheet and made of thermoplastic resin. The silica xerogel is held in the plurality of fibers. This heat insulation sheet is excellent in adhesiveness, and is easily attached to a protective sheet or a frame to be fixed.
Claims11
A heat insulation sheet comprising:
- a fiber sheet including fibers forming spaces among the fibers;
- a resin layer provided on a surface of an outer peripheral portion of the fiber sheet, the resin layer being denser than the fiber sheet and made of thermoplastic resin;
- and
- a silica xerogel disposed in the spaces of the fiber sheet to be held in the plurality of fibers.
A method for producing a heat insulation sheet, comprising:
- preparing a base material sheet including:
- a fiber sheet including fibers forming spaces among the fibers, and
- a resin layer provided on a surface of an outer peripheral portion of the fiber sheet, the resin layer being denser than the fiber sheet and made of thermoplastic resin;
- and
- obtaining a heat insulation sheet by impregnating the spaces of the fiber sheet with xerogel.
A secondary battery comprising:
- a plurality of battery cells;
- and
- a separator disposed between the plurality of battery cells,
- wherein the separator includes a heat insulation sheet and a frame fixed to an outer peripheral portion of the heat insulation sheet, and
- wherein the heat insulation sheet includes:
- a fiber sheet including fibers forming spaces among the fibers;
- a resin layer provided on a surface of the outer peripheral portion of the fiber sheet and fixed to the frame, the resin layer being denser than the fiber sheet and made of thermoplastic resin;
- and
- silica xerogel disposed in the spaces of the fiber sheet to be held in the plurality of fibers.
A secondary battery comprising:
- a plurality of battery cells;
- a plurality of heat insulation sheets between the plurality of battery cells, the plurality of heat insulation sheets including silica gel having nano-sized spaces therein for blocking heat transfer between the plurality of battery cells;
- a housing fixing the plurality of battery cells and the plurality of heat insulation sheets;
- and
- a plurality of adhesive agents each provided respective one of the plurality of battery cells and respective one of the plurality of heat insulation sheets.
Dependencies are inferred from the claim text.