Abstract: A secondary battery includes: a can having an accommodation space therein; an electrode assembly accommodated in the accommodation space in the can; and a cap assembly sealed with the can. The can has a beading part recessed into a side wall of the can at a region below where the cap assembly is accommodated, and the beading part has an acute angle with respect to the side wall of the can.

Abstract: A secondary battery is disclosed. In one embodiment, the secondary battery includes i) an electrode assembly comprising upper and lower surfaces opposing each other, ii) a container configured to receive the electrode assembly via an opening defined at one end thereof, iii) a cap assembly configured to close the opening of the container, wherein an electrolyte injection hole is defined in the cap assembly, and wherein the electrolyte injection hole is configured to receive electrolyte and iv) an insulation case configured to be received by the container and being interposed between the cap assembly and the electrode assembly, wherein a first electrolyte permeation passage is formed between an outer surface of the insulation case and an inner surface of the container, and wherein the first electrolyte permeation passage is configured to expedite the permeation of the received electrolyte into the lower surface of the electrode assembly.

Abstract: A secondary battery, including an electrode assembly having a positive sheet and a negative sheet and a separator is interposed therebetween; a tape to wrap an outer surface of the electrode assembly; and a case to receive the electrode assembly. After a remainder of the tape is formed to extend beyond a lower surface of the electrode assembly and joined by a press, the remainder is positioned between a bottom surface of the case and the lower surface of the electrode assembly. According to the embodiment of the present invention, since a junction portion of the tape extended to the outside of the lower surface of the electrode assembly is bent and inserted into the case, a shock-absorbing action is provided to reduce an external shock applied to the secondary battery. Further, an additional tape process can be omitted to simplify a manufacturing process of the secondary battery.

Abstract: A secondary battery includes an electrode assembly in which a first electrode plate, a separator, and a second electrode assembly are sequentially stacked forming a stack and is wound about one edge of the stack, and a plurality of finishing tapes attached to the outer surface of the electrode assembly and spaced apart from each other along the winding direction of the electrode assembly.

Abstract: A secondary battery, including an electrode assembly having a positive sheet and a negative sheet and a separator is interposed therebetween; a tape to wrap an outer surface of the electrode assembly; and a case to receive the electrode assembly. After a remainder of the tape is formed to extend beyond a lower surface of the electrode assembly and joined by a press, the remainder is positioned between a bottom surface of the case and the lower surface of the electrode assembly. According to the embodiment of the present invention, since a junction portion of the tape extended to the outside of the lower surface of the electrode assembly is bent and inserted into the case, a shock-absorbing action is provided to reduce an external shock applied to the secondary battery. Further, an additional tape process can be omitted to simplify a manufacturing process of the secondary battery.

Abstract: A secondary battery includes an electrode assembly in which a first electrode plate, a separator, and a second electrode assembly are sequentially stacked forming a stack and is wound about one edge of the stack, and a plurality of finishing tapes attached to the outer surface of the electrode assembly and spaced apart from each other along the winding direction of the electrode assembly.

Abstract: A secondary battery is disclosed. In one embodiment, the secondary battery includes i) an electrode assembly comprising upper and lower surfaces opposing each other, ii) a container configured to receive the electrode assembly via an opening defined at one end thereof, iii) a cap assembly configured to close the opening of the container, wherein an electrolyte injection hole is defined in the cap assembly, and wherein the electrolyte injection hole is configured to receive electrolyte and iv) an insulation case configured to be received by the container and being interposed between the cap assembly and the electrode assembly, wherein a first electrolyte permeation passage is formed between an outer surface of the insulation case and an inner surface of the container, and wherein the first electrolyte permeation passage is configured to expedite the permeation of the received electrolyte into the lower surface of the electrode assembly.