An energy storage device includes a case, an electrode assembly housed in the case, a current collector arranged between the electrode assembly and a lid of the case in Z-axis direction, and an electrode terminal fixed to the lid. The current collector has a terminal connecting portion connected to the electrode terminal and an electrode connecting portion connected to the electrode assembly. The terminal connecting portion and the electrode connecting portion are arranged side by side in X-axis direction intersecting with the Z-axis direction, and a thickness of the electrode connecting portion is smaller than a thickness of the terminal connecting portion.

Lithium-ion battery cells and a lithium-ion utilizing capacitor cells are placed spaced-apart in a common container and infiltrated with a common lithium-ion transporting, liquid electrolyte. The lithium-ion-utilizing capacitor and lithium-ion cell battery are combined such that their respective electrodes may be electrically connected, either in series or parallel connection for energy storage and management in an automotive vehicle or other electrical power supply application.

Lithium-ion battery cells and a lithium-ion utilizing capacitor cells are placed spaced-apart in a common container and infiltrated with a common lithium-ion transporting, liquid electrolyte. The lithium-ion-utilizing capacitor and lithium-ion cell battery are combined such that their respective electrodes may be electrically connected, either in series or parallel connection for energy storage and management in an automotive vehicle or other electrical power supply application.

A method of fabricating an energy storage device (1) comprising forming a stack comprising at least a first electrode layer (6), a first current collecting layer (12) and an electrolyte layer 8 disposed between the first electrode layer (6) and the first current collecting layer (12). Forming a first groove (24) in the stack through the first electrode layer (6) and the electrolyte layer (8), thereby forming exposed edges of the first electrode layer 6 and the electrolyte layer (8). Filling at least part of the first groove (24) with an electrically insulating material thereby covering the exposed edges of the first electrode layer (6) and the electrolyte layer (8) with the insulating material. Cutting through the insulating material and the first current collecting layer (12) along at least part of the first groove (24) in order to form an exposed edge of the first current collecting layer (12).

Heat resistant, highly conductive electrochemical cells for high temperature applications are described herein, having at least two electrodes and at least one separator enclosed in heat resistant ceramic enclosure with metalized terminals on its bottom. The electrodes have their tabs welded to inside connectors, and the cells are solderable to circuit boards or various circuits.

An electric storage device includes a case having a substantially rectangular shape including a cutout part. An electrode body is disposed in the case and includes a first electrode, a second electrode, and a separator disposed between the first and second electrodes. An electrolyte is located in the case and at least partially impregnating the electrode body. A first electrode terminal is located on a first part of a side surface of the case and is electrically connected to the first electrode by a first connection member which has elasticity in a direction extending from the first electrode terminal to the first electrode. A second electrode terminal is located on a second part of the side surface of the case and is electrically connected to the second electrode by a second elastic connection member which has elasticity in a direction extending from the second electrode terminal to the second electrode.

A module comprises a first ultracapacitor having a first terminal, a second ultracapacitor having a second terminal, and an interconnect strip is provided. The interconnect strip contains a central section positioned between a first attachment section and a second attachment section. The first terminal of the first ultracapacitor is connected to the first attachment section of the strip and the second terminal of the second ultracapacitor is connected to the second attachment section of the strip. Further, the central section is formed from a flexible conductive material.

A module comprises a first ultracapacitor having a first terminal, a second ultracapacitor having a second terminal, and an interconnect strip is provided. The interconnect strip contains a central section positioned between a first attachment section and a second attachment section. The first terminal of the first ultracapacitor is connected to the first attachment section of the strip and the second terminal of the second ultracapacitor is connected to the second attachment section of the strip. Further, the central section is formed from a flexible conductive material.

An electrical double layer capacitor having electrolyte-containing layer between a first polarizable electrode layer and a second polarizable electrode layer. An insulating adhesive portion adheres to a first current collector and a second current collector which at least partially face each other with the electrolyte-containing layer interposed therebetween. The insulating adhesive portion 15 extends around the first and second polarizable electrode layers and the electrolyte-containing layer. A thickness of the electrolyte-containing layer is larger than a difference between a thickness of the insulating adhesive portion and thicknesses of the first and second polarizable electrode layers.

An electrical double layer capacitor having electrolyte-containing layer between a first polarizable electrode layer and a second polarizable electrode layer. An insulating adhesive portion adheres to a first current collector and a second current collector which at least partially face each other with the electrolyte-containing layer interposed therebetween. The insulating adhesive portion 15 extends around the first and second polarizable electrode layers and the electrolyte-containing layer. A thickness of the electrolyte-containing layer is larger than a difference between a thickness of the insulating adhesive portion and thicknesses of the first and second polarizable electrode layers.