Patent ID: 8906525
Filing Date: 2014-12-09
Classification: H01G,H01M,Y02E,Y02P,Y02T

Abstract:
1. An energy storage device cell, comprising: a lithium ion battery main body including: a plurality of the lithium ion battery anode portions and a plurality of the lithium ion battery cathode portions are alternately stacked so that the lithium ion battery cathode portion is placed at an end in a stack direction of the lithium ion battery main body; a common anode portion including a common anode collector foil having a through-hole formed therein and common anode electrode layers provided on both surfaces of the common anode collector foil, the common anode portion being stacked on the lithium ion battery cathode portion placed at the end in the stack direction of the lithium ion battery main body; a lithium ion capacitor cathode portion including a capacitor cathode collector foil and a capacitor cathode electrode layer provided on the capacitor cathode collector foil, the lithium ion capacitor cathode portion being stacked on the common anode portion so that the capacitor cathode electrode layer is placed between the common anode portion and the capacitor cathode collector foil; separators provided respectively between the lithium ion battery anode portions and the lithium ion battery cathode portions, between the lithium ion battery cathode portion and the common anode portion, and between the common anode portion and the lithium ion capacitor cathode portion; and a container containing the lithium ion battery main body, the common anode portion, the lithium ion capacitor cathode portion, and the separators, wherein the battery anode collector foil and the common anode collector foil are connected to each other electrically, wherein the battery cathode collector foil and the capacitor cathode collector foil are connected to each other electrically, wherein each of a first subset of the common anode electrode layers provided on a lithium ion battery main body side has a through-hole formed therein that overlaps with the through-hole formed in the common anode collector foil, wherein a surface of each of a second subset of the common anode electrode layers provided on a common anode collector foil side and a lithium ion capacitor cathode portion side has a concave portion formed therein that is opposed to the through-hole formed in the common anode collector foil, and wherein the common anode portion further includes electron insulating metal oxide fine particles filling the through-hole of the common anode collector foil, the through-holes of each of the first subset of the common anode electrode layers, and the concave portions of each of the second subset of the common anode electrode layers wherein the common anode portion further includes an electron insulating metal oxide fine particle layer stacked on each of the first subset of common anode electrode layers provided on the lithium ion battery main body side.