Cell Stack Device for Fuel Cell - Kyocera Patent

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 31st, 2026

Detected March 31st, 2026

Summary

USPTO granted Kyocera Corporation Patent US12592400B2 for a cell stack device used in fuel cells. The patent covers configurations including chromium-containing metal members, covering layers, and bonding materials with specific thickness, surface roughness, and interface element requirements. The patent application (No. 17916457) was filed April 9, 2021, and includes 14 claims.

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What changed

USPTO granted Kyocera Corporation Patent US12592400B2 for a cell stack device, module, and module housing device used in fuel cell applications. The 14 granted claims specify configurations where a covering layer covers a chromium-containing metal member, with bonding material positioned between cells and the covering layer. The patent covers three alternative configurations: varying covering layer thickness or surface roughness at different positions; different surface roughness between the covering layer and metal member; or specific elements (Mn, Ti, Ca, or Al) positioned at the metal member-covering layer interface with content ratios different from the surrounding materials.

This is a patent grant notice with no regulatory compliance requirements. Companies in fuel cell, battery, or energy equipment manufacturing should review the patent claims to assess potential infringement risks for similar cell stack designs. No action is required unless the company manufactures or intends to manufacture products falling within the scope of the 14 granted claims.

Source document (simplified)

← USPTO Patent Grants

Cell stack device, module, and module housing device

Grant US12592400B2 Kind: B2 Mar 31, 2026

Assignee

KYOCERA Corporation

Inventors

Kazuya Imanaka, Fumito Furuuchi, Sasuke Shiramomo

Abstract

A cell stack device includes cells, a metal member containing chromium, a covering layer, and a bonding material. The cells include a first cell and the cells includes respective element portions. The covering layer covers the metal member. The bonding material is positioned between the first cell and the covering layer. The cell stack device satisfies any one of (1) The covering layer includes at least two portions having different thicknesses or different surface roughnesses at different positions. (2) A surface roughness of the covering layer is different from that of the metal member. (3) At least one element selected from the group consisting of Mn, Ti, Ca, and Al is positioned at the interface between the metal member and the covering layer, and the content ratio of the at least one element at the interface is different from that of the metal member or the covering layer.

CPC Classifications

H01M 8/0282 H01M 8/0258 H01M 8/0273 H01M 2008/1293 H01M 8/0206 H01M 8/021 H01M 8/0217 H01M 8/0228 H01M 8/2425 H01M 8/2432 H01M 8/2483 H01M 8/04 H01M 8/12 H01M 8/2475 H01M 8/248 H01M 8/2485 H01M 50/209 H01M 50/224 H01M 8/2465 Y02E 60/50