Seiko Instruments Inc

Ohara, Inc.

Ryohei Sato

Shunji Watanabe

Tsuneaki Tamachi

Kazuhito Ogasa

Yoshimi Kanno

Kazumi Tanaka

An electrochemical cell includes an all-solid-state electrode body in which a positive electrode layer and a negative electrode layer are laminated together through a solid electrolyte and an exterior body having a cavity in which the electrode body is stored. The exterior body has a first case and a second case which sandwich the electrode body and a sealing member that defines the cavity together with the first case and the second case by joining the first case and the second. The thermal expansion coefficients of the electrode body, the first case, the second case, and the sealing member are all 10&#xd7;10/&#xb0; C. or lower.

Electrochemical cell

The present invention provides an electrochemical cell including: an electrode body; an exterior packaging body in which a plurality of substrates including a first substrate formed from a ceramic material are stacked in the first direction, and a cavity in which the electrode body is accommodated is formed; a first electrode connection wiring that is formed in the exterior packaging body and connects a first electrode layer and an external substrate to each other; and a second electrode connection wiring that is forming in the exterior packaging body and connects a second electrode layer and the external substrate to each other. At least the first electrode connection wiring is formed in the first substrate, and an attachment portion, to which a fastening member configured to mount at least the first electrode connection wiring to the external substrate is attached, is formed in the first substrate.

The present invention is an all-solid-state electrode body including: a positive electrode via that is formed in a negative electrode connection layer, and connects a plurality of a positive electrode connection layers adjacent to each other in a first direction; a negative electrode via that is formed in the positive electrode connection layer, and connects a plurality of the negative electrode connection layers adjacent to each other in the first direction; a positive electrode current collector layer which is exposed on a first surface that faces one side of the first direction in a stacked body, and is connected to the positive electrode connection layer via the positive electrode via; and a negative electrode current collector layer which is exposed on the first surface in the stacked body, and is connected to the negative electrode connection layer via the negative electrode via.

Growing community of inventors

Sagamihara, Japan

Ryohei Sato