# US 10,374,269 B2 · Battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,269 B2 - Document ID: US10374269B2 - Status: Granted - Kind: B2 - Application number: 14/796,254 - Filed: 2015-07-10 - Published: 2016-01-14 - Granted: 2019-08-06 - Earliest claimed: 2014-07-11 - Assignees: Denso Corporation - Applicants: Denso Corporation - Inventors: Masaki Uchiyama; Ryuichiro Shinkai; Yoshimitsu Inoue; Takahiro Souki; Kouhei Yamamoto; Kouhei Yamaguchi; Tetsuya Goto - Web page: https://patentgrep.com/patent/US10374269B2 ## CPC - H01M 10/613: Cooling or keeping cold - H01M 10/625: Vehicles - H01M 10/647: Prismatic or flat cells, e.g. pouch cells - H01M 10/653: characterised by electrically insulating or thermally conductive materials - H01M 10/6552: Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes - H01M 10/6555: arranged between the cells - H01M 10/6563: with forced flow, e.g. by blowers - H01M 10/6568: characterised by flow circuits, e.g. loops, located externally to the cells or cell casings - H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - 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 battery pack includes a plurality of battery stacks integrated by stacking a plurality of unit batteries, a fluid passage where fluid flows for cooling the unit batteries disposed between the battery stacks, a blower for circulating the fluid in the fluid passage, and a plurality of heat conducting plates. The heat conducting plate is thermally connected to an outer casing of the unit batteries constituting the battery stacks adjacent to each other, and disposed so as to constitute a plurality of cooled portions of which parts thereof exist in the fluid passage. The battery pack includes a passage forming member that demarcates the fluid passage as an independent passage from the area near the outer casing of the unit battery, and includes a partition wall for supporting the heat conducting plate. ## Claims ### Claim 1 A battery pack comprising: a plurality of battery stacks integrated by stacking a plurality of unit batteries; a fluid passage only disposed between separate and adjacent battery stacks, the fluid passage extending in a stacking direction of the plurality of batteries, where fluid flows for cooling the plurality of unit batteries, the battery stacks disposed adjacent to each other in an aligning direction perpendicular to the stacking direction; a fluid driver for circulating the fluid in the fluid passage; a heat conducting member group including a plurality of heat conducting members each thermally connected to at least one of an outer casing or an electrode terminal of one of the plurality of unit batteries, the plurality of heat conducting members being aligned in the stacking direction; a passage forming member that demarcates the fluid passage as an independent passage from an area near the outer casing of the unit batteries, and includes a partition wall for supporting the heat conducting members; a plurality of cooled parts of the plurality of heat conducting members that project into the fluid passage, surface areas of individual cooled parts in a central part of the heat conducting member group in the stacking direction being larger than surface areas of individual cooled parts in ends of the heat conducting member group in the stacking direction, and each cooled part having a greater surface area at a downstream end thereof than an upstream end thereof relative to the fluid flow, all of the cooled parts protruding from a same battery stack overlapping in the fluid passage in the stacking direction; and fins protruding from the cooled parts that overlap in the aligning direction. ### Claim 2 (depends on 1) The battery pack according to claim 1, wherein, each of the plurality of heat conducting members is integrally molded with the passage forming member so as to penetrate the partition wall. ### Claim 3 (depends on 1) The battery pack according to claim 1, wherein, each unit battery is a pouch cell with its outer casing formed of laminate films; heat conducting members are stacked between the pouch cells and are heat conducting plates that constitute the battery stack together with the pouch cells; and the heat conducting plates each include a terminal heat absorber that absorbs heat generated by the electrode terminal by contacting the electrode terminal in an area covered with the laminate films via the laminate films in the pouch cells adjoining in the stacking direction. ### Claim 4 (depends on 1) The battery pack according to claim 1, wherein, each unit battery is a pouch cell with its outer casing formed of laminate films; heat conducting members are stacked between the pouch cells and are heat conducting plates that constitute the battery stack together with the pouch cells; and each heat conducting plate includes a heat absorbing piece that extends therefrom, and the heat absorbing piece contacts the pouch cell in an area positioned away from the cooled part and in a downstream half of the pouch cell relative to the fluid flow, the heat absorbing piece contacting the pouch cell via the laminate films to absorb heat generated in the pouch cell. ### Claim 5 (depends on 1) The battery pack according to claim 1, wherein, the passage forming member is formed by combining a plurality of members in the stacking direction; and sealers for preventing the fluid flowing through the fluid passage from leaking to outside are disposed to fitters between the plurality of members to be combined.