Thin type cell having superior air-tightness and mechanical strength
First Claim
1. A thin type cell comprising an outer sheath defining an interior of the cell for accommodating a cathode, an anode and an electrolyte, the outer sheath comprising a moisture-proofing three-layered film consisting of a heat fusible layer and a second layer with a metal foil layer sandwiched therebetween, the heat fusible layer facing the interior of the cell, and electrode terminals interconnecting electrodes and external terminals are formed of a netted or porous electrically conductive member, the electrode terminals passing through the outer sheath with the heat fusible layer sealingly engaging the terminals, the heat fusible layer containing a resin material that engages the terminals at a sealing portion along at least a portion of the terminals wherein a thickness of the resin material is two to three times thicker than an electrode terminal thickness of each electrode terminal.
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0 Petitions
Accused Products
Abstract
A thin type cell is made up of a cathode 1, an anode 2 and an electrolyte 3, sheathed within a moisture-proofing multi-layered film 4 comprising a heat fusible layer and a metal foil. A pair of electrode terminals 5, 6 interconnecting electrodes and external terminals are formed of a netted or porous electrically conductive member. By using the netted or porous electrically conductive materials as the electrode terminals 5, 6, the electrode terminals 5, 6 can be firmly bonded to the moisture-proofing multi-layered film 4. Moreover, by increasing the thickness of the heat fusible layer at the sealing portion X passed through by the electrode terminals 5, 6, shorting can be prevented from occurring.
63 Citations
13 Claims
- 1. A thin type cell comprising an outer sheath defining an interior of the cell for accommodating a cathode, an anode and an electrolyte, the outer sheath comprising a moisture-proofing three-layered film consisting of a heat fusible layer and a second layer with a metal foil layer sandwiched therebetween, the heat fusible layer facing the interior of the cell, and electrode terminals interconnecting electrodes and external terminals are formed of a netted or porous electrically conductive member, the electrode terminals passing through the outer sheath with the heat fusible layer sealingly engaging the terminals, the heat fusible layer containing a resin material that engages the terminals at a sealing portion along at least a portion of the terminals wherein a thickness of the resin material is two to three times thicker than an electrode terminal thickness of each electrode terminal.
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8. A thin type cell comprising:
an outer sheath defining an interior that accommodates a cathode, an anode and an electrolyte, the outer sheath comprising a three-layered structure consisting of a heat fusible layer and a second layer with a metal foil layer sandwiched therebetween, the heat fusible layer facing the interior of the cell, the cathode being connected to a first terminal that extends outward through the outer sheath, the anode being connected to a second terminal that extends outward through the sheath, the first and second terminals each having a flat structure, the electrode terminals passing through the outer sheath with the heat fusible layer sealingly engaging the terminals, the heat fusible layer containing a resin material that engages the terminals at a sealing portion along at least a portion of the terminals wherein a thickness of the resin material is two to three times thicker than an electrode terminal thickness of each electrode terminal. - View Dependent Claims (9, 10, 11, 12, 13)
Specification