# US 12,224,470 B2 · Cell stack device, module, and module housing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,470 B2 - Document ID: US12224470B2 - Status: Granted - Kind: B2 - Application number: 17/433,799 - Filed: 2020-02-26 - Published: 2022-05-05 - Granted: 2025-02-11 - Earliest claimed: 2019-02-27 - Assignees: KYOCERA Corporation - Applicants: KYOCERA Corporation - Inventors: Norimitsu Fukami - Web page: https://patentgrep.com/patent/US12224470B2 ## CPC - H01M 8/2465: Details of groupings of fuel cells - H01M 8/2475: Enclosures, casings or containers of fuel cell stacks - H01M 8/0247: characterised by the form (characterised by a channel configuration H01M8/0258) - Y02E 60/50: Fuel cells - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A cell stack device includes a cell stack constituted by arraying and electrically connecting cells, and a pair of conductive members respectively located on two ends of the cell stack in an array direction of the cells and electrically connected to the cells. Each conductive member includes a power receiving portion facing the cell stack and a current extraction portion extending from the power receiving portion. The current extraction portion includes an extraction portion body and a connecting portion to be connected to an external device. When a direction in which the current extraction portion extends from the power receiving portion is defined as a first direction and a direction orthogonal to the first direction is defined as a second direction, the extraction portion body includes, in the second direction, a first part shorter in length than an average length of the extraction portion body. ## Claims ### Claim 1 A cell stack device comprising: a cell stack constituted by arraying and electrically connecting cells; and a pair of conductive members respectively located at two ends of the cell stack in an array direction of the cells and electrically connected to the cells, each of the pair of conductive members comprising a power receiving portion facing the cell stack, and a current extraction portion extending from the power receiving portion, the current extraction portion comprising an extraction portion body and a connecting portion to be connected to an external device, wherein when a direction in which the current extraction portion extends from the power receiving unit is defined as a first direction, the current extraction portion has a length in the first direction, and when a direction orthogonal to the first direction is defined as a second direction, the current extraction portion has a width in the second direction, the extraction portion body comprises a first part having a shortest width in the second direction shorter than the width of the current extraction portion and a length in the first direction shorter than an average length of the extraction portion body in the first direction. ### Claim 2 (depends on 1) The cell stack device according to claim 1, wherein the first part is at least located in a region in which a distance from the power receiving portion is equal to or less than half of a length L1 of the current extraction portion in the first direction. ### Claim 3 (depends on 1) The cell stack device according to claim 1, further comprising: two or more of the first parts. ### Claim 4 (depends on 1) A module comprising: a housing container; and the cell stack device according to claim 1 housed in the housing container. ### Claim 5 (depends on 4) A module housing device comprising: an external case; and the module according to claim 4 housed in the external case. ### Claim 6 A cell stack device comprising: a cell stack constituted by arraying and electrically connecting cells; and a pair of conductive members respectively located at two ends of the cell stack in an array direction of the cells and electrically connected to the cells, each of the pair of conductive members comprising a power receiving portion facing the cell stack, and a current extraction portion extending from the power receiving portion, the current extraction portion comprising an extraction portion body and a connecting portion to be connected to an external device, wherein when a direction in which the current extraction portion extends from the power receiving unit is defined as a first direction, the current extraction portion has a length in the first direction, and when a direction orthogonal to the first direction is defined as a second direction, the current extraction portion has a width in the second direction, the extraction portion body comprises a first part having a shortest width in the second direction shorter than an average length of the extraction portion body in the first direction. ### Claim 7 (depends on 6) The cell stack device according to claim 6, wherein the first part is at least located in a region in which a distance from the power receiving portion is equal to or less than half of a length L1 of the current extraction portion in the first direction. ### Claim 8 (depends on 6) The cell stack device according to claim 6, further comprising: two or more of the first parts. ### Claim 9 (depends on 6) A module comprising: a housing container; and the cell stack device according to claim 6 housed in the housing container. ### Claim 10 (depends on 9) A module housing device comprising: an external case; and the module according to claim 9 housed in the external case.