Secondary battery
Secondary battery 100 comprises: battery electrode assembly (electrode laminate) 4 that includes positive electrodes 1 and negative electrodes 2 that overlap each other with separator 3 interposed therebetween; and conductive adhesive tape 5 which has a multilayer structure including adhesive layer 5 a and conductive layer 5 b , wherein adhesive layer 5 a has conductivity and adhesiveness and adheres to a surface of battery electrode assembly 4 , conductive layer 5 b is laminated on adhesive layer 5 a , and conductive adhesive tape 5 has electric resistance of 1.0 Ω/cm 2 or less in a thickness direction and covers at least a part of an outer peripheral portion of battery electrode assembly 4 by being wound around said part.
1. A secondary battery comprising:
a battery electrode assembly that includes positive electrodes and negative electrodes that overlap each other with a separator interposed therebetween; and
a conductive adhesive tape which has a multilayer structure including an adhesive layer and a conductive layer, wherein the adhesive layer has conductivity and adhesiveness and adheres to a surface of said battery electrode assembly, the conductive layer is laminated on said adhesive layer, and the conductive adhesive tape has electric resistance of 1.0 Ω/cm 2 or less in a thickness direction of the conductive adhesive tape and covers at least a part of an outer peripheral portion of said battery electrode assembly by being wound around said part.
2. The secondary battery according to claim 1 , further comprising an insulating member which is located on a side surface of said battery electrode assembly and which covers at least one of a side edge of said positive electrode and a side edge of said negative electrode such that the covered side edge is not in contact with said adhesive layer.
3. The secondary battery according to claim 2 , wherein said insulating member is a bent portion formed in a side portion of said separator.
4. The secondary battery according to claim 1 , wherein said separator is in a bag shape, and said positive electrode or said negative electrode is contained inside said bag-shaped separator, said battery electrode assembly comprises said bag-shaped separator containing said positive electrode or said negative electrode, and the remaining electrode, which is either said positive electrode or said negative electrode, said bag-shaped separator and said remaining electrode being alternately laminated on each other.
5. The secondary battery according to claim 1 , wherein said adhesive layer of said conductive adhesive tape contains a conductive filler.
6. The secondary battery according to claim 2 , wherein said adhesive layer of said conductive adhesive tape contains a conductive filler.
7. The secondary battery according to claim 3 , wherein said adhesive layer of said conductive adhesive tape contains a conductive filler.
8. The secondary battery according to claim 4 , wherein said adhesive layer of said conductive adhesive tape contains a conductive filler.