NON-AQUEOUS SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME

摘要

A nonaqueous secondary battery wherein internal short circuits caused by som e kinds of manufacturing processes can be prevented by avoiding the falling of active material particles from end faces of sheet electrodes, and the batter y capacity of an electrode plate laminate which can be stored in a battery can of the same size as those of the conventional laminates can be increased without increasing the thickness of the active material layer. In order to realize the features mentioned above, at least one end face of each of positive pole active material layers (1b) and negative pole active material layers (2b) is coated with an insulating material particle aggregate layer (3F) wherein insulating material particles are bonded with binders. The positive pole active material layer (1b) is formed in such a size that it ma y not overhang the negative pole active material layer (2b) which is paired wi th the positive pole active material layer (1b) for a battery layer. A separato r is constituted of an insulating material particle aggregate layer (3B) and i s secured to either a positive pole (1) or a negative pole (2) or to both of them. The separator is so located that it may cover the entire surface of th e positive pole active material layer (1b) which faces at least the negative pole (2) and it may not overhang the end faces of the positive and the negative current collector (1a, 2b).