Insulation failure inspecting apparatus, insulation failure inspecting method using same, and method for manufacturing electrochemical cell
First Claim
1. A method for manufacturing an electrochemical cell, wherein the electrochemical cell comprises:
- an electrochemical cell main body including;
a positive electrode that is composed of a positive electrode active material and a positive electrode current collector provided with a first metal terminal at an end portion thereof;
a negative electrode that is composed of a negative electrode active material and a negative electrode current collector provided with a second metal terminal at an end portion thereof; and
an electrolyte filled between the positive electrode and the negative electrode; and
an outer packaging body made of a packaging material formed by sequentially laminating at least a metal foil layer and a heat-sealable resin layer, and whereinthe method comprises;
housing the electrochemical cell main body in the outer packaging body so that tip ends of the first and second metal terminals protrude outside of the outer packaging body;
heat-sealing a peripheral edge portion of the outer packaging body, the outer packaging body having the first and second metal terminals protruding;
subsequently applying a voltage between the first metal terminal and the metal foil layer or between the second metal terminal and the metal foil layer; and
performing an inspection as to whether or not there is an insulation failure due to a short circuit between the first or second metal terminal and the metal foil layer or due to a crack in the heat-sealable resin layer, based on a variation of a voltage held between the one of the metal terminals and the metal foil layer after the voltage application is halted.
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Accused Products
Abstract
A method for manufacturing an electrochemical cell includes housing a main cell body in an outer packaging body of packaging material formed by laminating a metal foil layer and a heat-sealable resin layer, provided the tip ends of a first metal terminal and a second metal terminal are protruding outside the outer packaging body, heat-sealing a peripheral edge portion of the outer packaging body so the outer packaging body has the first and second terminals protruding; applying a voltage between the first terminal and the foil layer or between the second terminal and the foil layer; and inspecting for insulation failure from a short circuit between the first or second terminal and the foil layer or from a crack in the heat-sealable resin layer, based on a variation of a voltage held between the one of the metal terminals and the metal foil layer after halting the voltage.
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Citations
12 Claims
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1. A method for manufacturing an electrochemical cell, wherein the electrochemical cell comprises:
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an electrochemical cell main body including; a positive electrode that is composed of a positive electrode active material and a positive electrode current collector provided with a first metal terminal at an end portion thereof; a negative electrode that is composed of a negative electrode active material and a negative electrode current collector provided with a second metal terminal at an end portion thereof; and an electrolyte filled between the positive electrode and the negative electrode; and an outer packaging body made of a packaging material formed by sequentially laminating at least a metal foil layer and a heat-sealable resin layer, and wherein the method comprises; housing the electrochemical cell main body in the outer packaging body so that tip ends of the first and second metal terminals protrude outside of the outer packaging body; heat-sealing a peripheral edge portion of the outer packaging body, the outer packaging body having the first and second metal terminals protruding; subsequently applying a voltage between the first metal terminal and the metal foil layer or between the second metal terminal and the metal foil layer; and performing an inspection as to whether or not there is an insulation failure due to a short circuit between the first or second metal terminal and the metal foil layer or due to a crack in the heat-sealable resin layer, based on a variation of a voltage held between the one of the metal terminals and the metal foil layer after the voltage application is halted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification