An electrochemical device includes a housing, an electrode assembly, a first tab, a second tab, and a third tab. The first tab and the second tab are connected to the first electrode plate. A protruding part of the second tab out of the housing is connecte...

An an energy storage apparatus is provided. the energy storage apparatus includes: a plurality of single batteries and a bipolar plate, each of the plurality of single batteries including a battery cell, the battery cell including a first electrode and a s...

A cylindrical battery having a bottomed tubular exterior can; an electrode body in the exterior can and around which a long positive electrode and a long negative electrode are wound with a separator therebetween; a plurality of negative-electrode lead par...

The present invention relates to widening a welding area where an uncoated region contacts a current collecting plate of a rechargeable battery and preventing a laser beam from penetrating through an electrode assembly during manufacture. The rechargeable ...