Patent ID: 7582379

Claim:
A secondary battery of an assemble-type structure, comprising: a cell body including an electrode assembly of cathode/separator/anode sealed therein; and a cap assembly including a protection circuit electrically connected to the cell body and a cap housing enclosing a portion of the battery, and being detachably coupled to the cell body, wherein electrode terminals of the cell body are protruded from an upper part of the cell body and the protection circuit is mounted on the cell body, thereby resulting in electrical connection therebetween; wherein detachable coupling between the cell body and cap assembly is accomplished by extended lateral parts of the cap housing, wherein the lateral parts have a structure in which both sides or an entirety of the lateral parts of the cap housing extend downward to the cell body, such that the cap housing of the cap assembly can be tightly adhered to an upper lateral side of the cell body; and wherein steps are formed on sides of the cell body, to which the extended lateral parts of the cap housing are tightly adhered, such that the extended lateral parts of the cap housing are not protruded from the sides of the cell body, in a state that the cell body and the cap housing are coupled.