Method and apparatus for manufacturing battery electrode plate and battery using the same

Abstract

A battery electrode plate ( 19 ) is produced via an active material impregnation step for impregnating an entire porous core substrate shaped like a thin plate ( 1 ) with an active material ( 3 ), a pressing step for performing press working on the core substrate to form a plurality of rail shaped protrusions ( 8 ), an active material removal step for removing the active material to form core substrate exposed sections ( 13 ) by applying ultrasonic vibrations to the rail shaped protrusions, a flattening step for compressing the core substrate exposed sections down to an identical level with the other sections, and a cutting step for cutting predetermined sections including the core substrate exposed sections.

1 . A cylindrical battery comprising: 
 an electrode group formed from battery electrode plates of a positive electrode and a negative electrode spirally wound with a separator interposed therebetween; and    a cylindrical battery case for housing said electrode group;    at least one of the battery electrode plates being manufactured by a method comprising:    an active material impregnation step for impregnating an entire porous core substrate shaped like a thin plate with an active material;    a pressing step for performing press working on said active material impregnated core substrate to form a plurality of rail shaped protrusions;    an active material removal step for removing the active material to form core substrate exposed sections by applying ultrasonic vibrations to said rail shaped protrusions;    a flattening step for compressing said core substrate exposed sections down to an identical level with other sections; and    a cutting step for cutting predetermined sections including said core substrate exposed sections to form a battery electrode plate.    
     
     
         2 . A cylindrical battery according to  claim 1 , in which the positive and the negative electrode plates are manufactured by said method.