CELL

• Main Author: WACHI TAKESHI
• Format: Patent
• Language: English
• Published: 20.12.1983
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PURPOSE:To improve an electric discharge characteristic of a cell, by setting area in a separator side smaller than the area in an opposite side to the separator side of a negative electrode in the flat type lithium cell and compensating a decrease in thickness of the negative electrode in accordance with the lapse of an electric discharge time. CONSTITUTION:A positive electrode compound 6, separator 7 and a negative electrode 11 consisting of lithium are laminated and sealed into a positive electrode can 3 and a negative electrode can 4 through a gasket 5 to form a flat type lithium cell. Here by providing a tapered face 11a, a shape of the negative electrode 11 is set in such a manner that area in a side of the separator 7 is smaller than the area in an opposite side to the separator. Accordingly, as the electric discharge time elapses the negative electrode 11 is consumed by electric discharge reaction from its side contacted with the separator 7, here the contact area is successively increased, in consequence an increase of internal resistance can be cancelled, and flatness of an electric discharge characteristic can be substantially improved.