# US 12,224,415 B2 · Power supply device, electric vehicle using same, 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 12,224,415 B2 - Document ID: US12224415B2 - Status: Granted - Kind: B2 - Application number: 17/630,947 - Filed: 2020-07-20 - Published: 2022-09-01 - Granted: 2025-02-11 - Earliest claimed: 2019-08-07 - Assignees: Sanyo Electric Co., Ltd. - Applicants: SANYO Electric Co., Ltd. - Inventors: Hiroyuki Takahashi - Web page: https://patentgrep.com/patent/US12224415B2 ## CPC - H01M 10/613: Cooling or keeping cold - B60K 6/28: characterised by the electric energy storing means, e.g. batteries or capacitors - B60L 50/64: Constructional details of batteries specially adapted for electric vehicles - H01M 10/0481: {Compression means other than compression means for stacks of electrodes and separators} - H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries} - H01M 10/441: {for several batteries or cells simultaneously or sequentially} - H01M 10/46: Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) - 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 10/6551: Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings - H01M 10/6554: Rods or plates - H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) - H01M 10/6569: Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation (heat pipes H01M10/6552) - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - 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 - B60Y 2200/91: Electric vehicles - B60Y 2200/92: Hybrid vehicles - B60Y 2400/112: Batteries - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H02J 7/35: with light sensitive cells - H02J 7/50: acting upon multiple batteries simultaneously or sequentially - H02P 27/06: using DC to AC converters or inverters (H02P27/05 takes precedence) - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Power supply device includes a plurality of battery cells each having an exterior can in a prismatic shape, a pair of end plates having pressing surfaces that press both side end surfaces of battery stack in which the plurality of battery cells are stacked, a plurality of fastening members each of which has a plate shape extended in a stacking direction of the plurality of battery cells and is disposed on opposing side surfaces of battery stack to fasten end plates to each other, thermal plate for placing battery stack on an upper surface side to dissipate heat from battery stack, and heat transfer sheet interposed between an upper surface of thermal plate and a lower surface of battery stack to bring thermal plate and battery stack into a thermally coupled state. A part of a lower surface of each of end plates, the part facing heat transfer sheet, is disposed at the same height as or above an upper surface of heat transfer sheet. ## Claims ### Claim 1 A power supply device comprising: a plurality of battery cells each including an outer covering can in a prismatic shape; a pair of end plates each including a pressing surface that presses a corresponding one of both side end surfaces of a battery stack including the plurality of battery cells stacked; a plurality of fastening members each including a plate shape extended in a stacking direction of the plurality of battery cells, the plurality of fastening members each being disposed on a corresponding one of opposing side surfaces of the battery stack to fasten the end plates to each other; a thermal plate for placing the battery stack close to an upper surface of the thermal plate and dissipating heat from the battery stack; and a heat transfer sheet interposed between an upper surface of the thermal plate and a lower surface of the battery stack to bring the thermal plate and the battery stack into a thermally coupled state, wherein each of the end plates includes a part of a lower surface facing the heat transfer sheet, the part being disposed at the same height as or above an upper surface of the heat transfer sheet, and the end plates each includes each of spacer parts protruding by a thickness of the heat transfer sheet on a corresponding one of both sides of the pressing surface. ### Claim 2 (depends on 1) The power supply device according to claim 1, further comprising an intermediate plate that is located in a middle of the battery stack and presses the battery stack from the middle on both side surfaces of the intermediate plate. ### Claim 3 (depends on 2) The power supply device according to claim 2, wherein the thermal plate is divided at a position of the intermediate plate. ### Claim 4 (depends on 1) The power supply device according to claim 1, wherein the heat transfer sheet includes a low frictional resistance region that reduces frictional resistance with the battery stack on an upper surface of the heat transfer sheet. ### Claim 5 (depends on 4) The power supply device according to claim 4, wherein the low frictional resistance region is a sliding sheet interposed between the heat transfer sheet and the battery stack, and frictional resistance of the sliding sheet is lower than frictional resistance of the heat transfer sheet. ### Claim 6 (depends on 1) A vehicle comprising: the power supply device according to claim 1; a motor for travelling that is supplied with electric power from the power supply device; a vehicle body mounted with the power supply device and the motor; and wheels that are driven by the motor to cause the vehicle body to travel. ### Claim 7 (depends on 1) A power storage device comprising the power supply device according claim 1; the power supply device; a power supply controller that controls charging and discharging of the power supply device, and the power supply controller enables charging of the battery cells by electric power from an outside and performs control to charge the battery cells. ### Claim 8 A power supply device comprising: a plurality of battery cells each including an outer covering can in a prismatic shape; a pair of end plates each including a pressing surface that presses a corresponding one of both side end surfaces of a battery stack including the plurality of battery cells stacked; a plurality of fastening members each including a plate shape extended in a stacking direction of the plurality of battery cells, the plurality of fastening members each being disposed on a corresponding one of opposing side surfaces of the battery stack to fasten the end plates to each other; a thermal plate for placing the battery stack close to an upper surface of the thermal plate and dissipating heat from the battery stack; and a heat transfer sheet interposed between an upper surface of the thermal plate and a lower surface of the battery stack to bring the thermal plate and the battery stack into a thermally coupled state, wherein each of the end plates includes a part of a lower surface facing the heat transfer sheet, the part being disposed at the same height as or above an upper surface of the heat transfer sheet, and the end plates each includes a lower surface separated from an end surface of the heat transfer sheet. ### Claim 9 (depends on 8) The power supply device according to claim 8, further comprising an intermediate plate that is located in a middle of the battery stack and presses the battery stack from the middle on both side surfaces of the intermediate plate. ### Claim 10 (depends on 9) The power supply device according to claim 9, wherein the thermal plate is divided at a position of the intermediate plate. ### Claim 11 (depends on 8) The power supply device according to claim 8, wherein the heat transfer sheet includes a low frictional resistance region that reduces frictional resistance with the battery stack on an upper surface of the heat transfer sheet. ### Claim 12 (depends on 11) The power supply device according to claim 11, wherein the low frictional resistance region is a sliding sheet interposed between the heat transfer sheet and the battery stack, and frictional resistance of the sliding sheet is lower than frictional resistance of the heat transfer sheet. ### Claim 13 (depends on 8) A vehicle comprising: the power supply device according to claim 8; a motor for travelling that is supplied with electric power from the power supply device; a vehicle body mounted with the power supply device and the motor; and wheels that are driven by the motor to cause the vehicle body to travel. ### Claim 14 (depends on 8) A power storage device comprising the power supply device according claim 8; the power supply device; a power supply controller that controls charging and discharging of the power supply device, and the power supply controller enables charging of the battery cells by electric power from an outside and performs control to charge the battery cells. ### Claim 15 A power supply device comprising: a plurality of battery cells each including an outer covering can in a prismatic shape; a pair of end plates each including a pressing surface that presses a corresponding one of both side end surfaces of a battery stack including the plurality of battery cells stacked; a plurality of fastening members each including a plate shape extended in a stacking direction of the plurality of battery cells, the plurality of fastening members each being disposed on a corresponding one of opposing side surfaces of the battery stack to fasten the end plates to each other; a thermal plate for placing the battery stack close to an upper surface of the thermal plate and dissipating heat from the battery stack; and a heat transfer sheet interposed between an upper surface of the thermal plate and a lower surface of the battery stack to bring the thermal plate and the battery stack into a thermally coupled state, wherein the end plates each includes: each of spacer parts protruding on a corresponding one of both sides of the pressing surface; and a recessed part defined by the pressing surface and the spacer parts on a lower surface of each of the end plates, and an uppermost surface of the recessed part is positioned above the lower surface of the battery stack. ### Claim 16 (depends on 15) The power supply device according to claim 15, further comprising an intermediate plate that is located in a middle of the battery stack and presses the battery stack from the middle on both side surfaces of the intermediate plate. ### Claim 17 (depends on 16) The power supply device according to claim 16, wherein the thermal plate is divided at a position of the intermediate plate. ### Claim 18 (depends on 15) The power supply device according to claim 15, wherein the heat transfer sheet includes a low frictional resistance region that reduces frictional resistance with the battery stack on an upper surface of the heat transfer sheet. ### Claim 19 (depends on 18) The power supply device according to claim 18, wherein the low frictional resistance region is a sliding sheet interposed between the heat transfer sheet and the battery stack, and frictional resistance of the sliding sheet is lower than frictional resistance of the heat transfer sheet. ### Claim 20 (depends on 15) A vehicle comprising: the power supply device according to claim 15; a motor for travelling that is supplied with electric power from the power supply device; a vehicle body mounted with the power supply device and the motor; and wheels that are driven by the motor to cause the vehicle body to travel. ### Claim 21 (depends on 15) A power storage device comprising the power supply device according claim 15; the power supply device; a power supply controller that controls charging and discharging of the power supply device, and the power supply controller enables charging of the battery cells by electric power from an outside and performs control to charge the battery cells.