# US 12,763,393 B2 · Power supply device and electric vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,393 B2 - Document ID: US12763393B2 - Status: Granted - Kind: B2 - Application number: 17/441,239 - Filed: 2019-12-20 - Published: 2022-06-02 - Granted: 2026-10-13 - Earliest claimed: 2019-03-27 - Assignees: Sanyo Electric Co., Ltd. - Applicants: SANYO Electric Co., Ltd. - Inventors: Nao Kogami; Kazuhiro Harazuka - Web page: https://patentgrep.com/patent/US12763393B2 ## CPC - H01M 10/625: Vehicles - H01M 10/658: by thermal insulation or shielding - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/264: for cells or batteries, e.g. straps, tie rods or peripheral frames - H01M 50/291: characterised by their shape - H01M 50/293: characterised by the material - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY ## Abstract A power supply device includes a battery block in which a plurality of battery cells are stacked in a thickness with separator interposed therebetween, a pair of end plates disposed on both end surfaces of the battery block, and a binding bar coupled to the pair of end plates and fixing a battery block in a pressurized state via the end plates. Separator includes heat insulating sheet in which a gap of a fiber sheet is filled with silica aerogel, and rubbery elastic sheet stacked on a surface of heat insulating sheet. ## Claims ### Claim 1 A power supply device comprising: a battery block including a plurality of battery cells stacked along a thickness of each of the plurality of battery cells with a separator interposed between the plurality of battery cells; a pair of end plates disposed on both end surfaces of the battery block; and a binding bar coupled to the pair of end plates and fixing the battery block in a pressurized state via the end plates, wherein the separator includes a heat insulating sheet including a fiber sheet and silica aerogel, and an elastic sheet stacked on an entirety of a surface of the heat insulating sheet that faces an adjacent battery cell of the plurality of battery cells, wherein the elastic sheet comprises a synthetic rubber whose hardness is from 10 degrees to 80 degrees inclusive and whose compression set is 20% or less. ### Claim 2 (depends on 1) The power supply device according to claim 1, wherein the elastic sheet is stacked on each of both surfaces of the heat insulating sheet. ### Claim 3 (depends on 1) The power supply device according to claim 1, wherein the elastic sheet is stacked only on one surface of the heat insulating sheet. ### Claim 4 (depends on 1) The power supply device according to claim 1, wherein the elastic sheet is made of a synthetic rubber sheet. ### Claim 5 (depends on 1) The power supply device according to claim 1, wherein the synthetic rubber comprises any of isoprene rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile rubber, polyisobutylene rubber, ethylene propylene rubber, ethylene vinyl acetate copolymer rubber, chlorosulfonated polyethylene rubber, acrylic rubber, fluororubber, epichlorohydrin rubber, urethane rubber, silicone rubber, thermoplastic olefin rubber, ethylene propylene diene rubber, butyl rubber, polyether rubber, or a combination thereof. ### Claim 6 (depends on 1) The power supply device according to claim 1, wherein a thickness of the elastic sheet is from 0.2 mm to 2 mm inclusive. ### Claim 7 (depends on 6) The power supply device according to claim 6, wherein the heat insulating sheet is thicker than the elastic sheet. ### Claim 8 (depends on 1) The power supply device according to claim 1, wherein a thickness of the heat insulating sheet is from 0.5 mm to 2 mm inclusive. ### Claim 9 (depends on 1) The power supply device according to claim 1, wherein the separator is stacked between each pair of adjacent battery cells among the plurality of battery cells. ### Claim 10 (depends on 1) An electric vehicle comprising: the power supply device according to claim 1; a motor for traveling supplied with electric power from the power source device; a vehicle body mounted with the power supply device and the motor; and a wheel driven by the motor to cause the vehicle body to travel. ### Claim 11 A power supply device comprising: a battery block including a plurality of battery cells stacked along a thickness of each of the plurality of battery cells with a separator interposed between the plurality of battery cells; a pair of end plates disposed on both end surfaces of the battery block; and a binding bar coupled to the pair of end plates and fixing the battery block in a pressurized state via the end plates, wherein the separator includes a heat insulating sheet including a fiber sheet and silica aerogel, and an elastic sheet stacked on a surface of the heat insulating sheet, wherein the elastic sheet is made of a synthetic rubber sheet that has a compression set of 20% or less and that has a hardness from 10 degrees to 80 degrees inclusive. ### Claim 12 (depends on 1) The power supply device according to claim 1, wherein the synthetic rubber comprises a foamed urethane rubber. ### Claim 13 (depends on 12) The power supply device according to claim 12, wherein the foamed urethane rubber has a density of 150 kg/m3 to 750 kg/m3.