# US 12,218,365 B2 · Power supply device, electric vehicle equipped with said power supply device, and power storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,218,365 B2 - Document ID: US12218365B2 - Status: Granted - Kind: B2 - Application number: 17/619,989 - Filed: 2020-06-15 - Published: 2022-11-10 - Granted: 2025-02-04 - Earliest claimed: 2019-06-28 - Assignees: Sanyo Electric Co., Ltd. - Applicants: SANYO Electric Co., Ltd. - Inventors: Nao Kogami; Hiroyuki Takahashi - Web page: https://patentgrep.com/patent/US12218365B2 ## CPC - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 10/625: Vehicles - H01M 10/658: by thermal insulation or shielding - H01M 50/242: adapted for protecting batteries against vibrations, collision impact or swelling - H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) - H01M 50/264: for cells or batteries, e.g. straps, tie rods or peripheral frames - H01M 50/289: characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) - H01M 50/291: characterised by their shape - H01M 50/293: characterised by the material - H01M 50/409: Separators, membranes or diaphragms characterised by the material - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A power supply device includes a battery block formed by stacking a plurality of battery cells in a thickness with separator interposed between corresponding battery cells, a pair of end plates disposed on respective end faces of the battery block, and a binding bar coupled to the pair of end plates to fix the battery block in a compressed state together with the end plates. Separator includes heat-insulating sheet and elastic layer layered on a surface of heat-insulating sheet, elastic layer having elastic protrusion that is partially in adhesion to a case surface of battery cell and is deformed by expansion of battery cell, and deformation space is provided for elastic protrusion pressed by battery cell to be displaced in an outer peripheral direction orthogonal to a pressing direction. ## Claims ### Claim 1 A power supply device comprising: a battery block including a plurality of battery cells stacked in a thickness with a separator interposed between corresponding battery cells among the plurality of battery cells; a pair of end plates disposed on respective end faces of the battery block; and a binding bar coupled to the pair of end plates to fix the battery block in a compressed state together with the end plates, the separator including: a heat-insulating sheet; and an elastic layer layered on a surface of the heat-insulating sheet, the elastic layer including an elastic protrusion that is partially in adhesion to a surface of a case of a corresponding battery cell among the corresponding battery cells and is deformed by expansion of the corresponding battery cell, wherein a deformation space is provided between the corresponding battery cell and the separator for the elastic protrusion pressed by the corresponding battery cell to be displaced in an outer peripheral direction orthogonal to a pressing direction, wherein the elastic layer is provided at a central part of the elastic layer, excluding an upper end part and a lower end part of the elastic layer, with an elastic protrusion that protrudes to be in adhesion to the corresponding battery cell, wherein the elastic layer includes a plurality of elastic protrusions formed in a row along the central part each being the elastic protrusion, and where the deformation space is provided as a gap formed between each of the elastic protrusions adjacent to each other among the plurality of elastic protrusions. ### Claim 2 (depends on 1) The power supply device according to claim 1, wherein the heat-insulating sheet including a hybrid material of an inorganic powder and a fibrous reinforcing material. ### Claim 3 (depends on 2) The power supply device according to claim 2, wherein the inorganic powder is silica aerogel. ### Claim 4 (depends on 1) The power supply device according to claim 1, wherein the separator is provided with the elastic layer that is layered on each of both surfaces of the heat-insulating sheet. ### Claim 5 (depends on 1) The power supply device according to claim 1, wherein at least one elastic protrusion is bonded to the surface of the case of the corresponding battery cell. ### Claim 6 (depends on 1) The power supply device according to claim 1, wherein the elastic layer including at least one selected from synthetic rubber, thermoplastic elastomer, and urethane foam. ### Claim 7 (depends on 1) The power supply device according to claim 1, wherein the elastic layer includes a thickness of 0.2 mm or more and 3 mm or less in an uncompressed state. ### Claim 8 (depends on 1) An electric vehicle comprising: the power supply device according to claim 1; a motor for travelling that receives electric power from the power supply device; a vehicle body equipped with the power supply device and the motor; and a wheel that is driven by the motor to cause the vehicle body travel. ### Claim 9 (depends on 1) A power storage device comprising: the power supply device according to claim 1; a power supply controller to control charging and discharging of the power supply device, wherein the power supply controller enables charging of the plurality of battery cells with electric power supplied from an outside and causes the plurality of battery cells to charge.