Patent ID: 7153610
Filing Date: 2006-12-26
Classification: H01M,Y02E,Y02P

Abstract:
1. A battery comprising: a battery can; a negative electrode plate for battery, said negative electrode plate having a paste-like material which contains an active material and which is provided on the entire surface of a rectangular conductive porous substrate including edge portions extending along long sides of the substrate, said negative electrode plate being wound in a cylindrical shape to be inserted into said battery can; and a plate-shaped collector having ribs formed by raising part thereof, said ribs being resistance-welded to one of said edge portions of said conductive porous substrate while said paste-like material provided on said edge portions; wherein 0.25<R<2.5 is satisfied assuming that a specific electrical resistance of said conductive porous substrate is rb, a thickness of said conductive porous substrate being tb, a ratio rb/tb of rb to rb being Rb, a specific electrical resistance of said plate-like collector being rc, a thickness of said plate-like collector being tc, a ratio rc/tc of tc to rc being Rc, and a ratio Rc/Rb of Rc to Rb being R.