CELL AND METHOD OF PRODUCING THE SAME

摘要

A cell developed to solve the problems of a conventional cell that a large short-circuit current flows when the temperature of the cell is raised due to internal short circuit, whereby the temperature of the cell is further raised due to heat buildup and a further increased short-circuit current flows, and that when an aluminum-laminated bag is used as a covering member in order to seal the cell body, the sealed port is apt to be opened due to temperature rise, leaving the problem of safety. Specifically a cell in which at least either a positive electrode (1) or a negative electrode (2) is provided with an active material layer (6) containing an active material (8) and an electron conductive material (9) in contact with the active material (8), and an electrolyte layer (3) is sandwiched between the positive electrode (1) and the negative electrode (2) thereby to constitute a cell body (11). The cell body is sealed with a covering member (14) made of aluminum (13) and a thermally fusible resin (12). The electron conductive material (9) contains an electrically conductive filler and a resin and has a resistance increasing with temperature.