# US 12,600,265 B2 · Power supply device, electric vehicle provided with 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 12,600,265 B2 - Document ID: US12600265B2 - Status: Granted - Kind: B2 - Application number: 17/758,967 - Filed: 2020-09-15 - Published: 2023-05-18 - Granted: 2026-04-14 - Earliest claimed: 2020-01-23 - Assignees: Sanyo Electric Co., Ltd. - Applicants: SANYO Electric Co., Ltd. - Inventors: Jun Asakura; Junya Yano - Web page: https://patentgrep.com/patent/US12600265B2 ## CPC - B60L 58/22: Balancing the charge of battery modules - H02J 7/50: acting upon multiple batteries simultaneously or sequentially - B60L 58/14: Preventing excessive discharging - B60L 58/26: by cooling - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H01M 10/441: {for several batteries or cells simultaneously or sequentially} - H01M 10/482: {for several batteries or cells simultaneously or sequentially} - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - 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 50/298: characterised by the wiring of battery packs - H02J 7/80: including monitoring or indicating arrangements - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] - Y02E 60/10: Energy storage using batteries - 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 - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - 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 power supply device connects a plurality of battery modules including a plurality of battery cells by power line. Battery module includes cell monitor circuit that detects battery information, and a plurality of cell monitor circuits provided in each battery module are cascade-connected via communication line. Cell monitor circuit includes communication interface including connection parts formed by connecting communication line, and communication interface sets a withstand voltage applied to connection part to be higher than an output voltage of the power supply device. ## Claims ### Claim 1 A power supply device comprising: a plurality of battery modules each including a plurality of battery cells; and a power line connecting the plurality of battery modules, wherein each of the battery modules includes a cell monitor circuit that detects battery information, a plurality of the cell monitor circuits are cascade-connected via a communication line, the cell monitor circuit includes a communication interface including a connection part for connecting the communication line to the communication interface, the communication interface sets a withstand voltage applied to the connection part to be a voltage higher than an output voltage of the power supply device, and the communication line includes a non-parallel communication line connected to a cell monitor circuit of a battery module different from a battery module to which the power line is connected among the plurality of battery modules. ### Claim 2 (depends on 1) The power supply device according to claim 1, wherein when each of the battery modules is a rectangular-parallelepiped extending in a stacking direction of the battery cell, both ends in the stacking direction of the battery cell are module ends, and both sides in the stacking direction are module side surfaces, the connection part is arranged at the module ends. ### Claim 3 (depends on 2) The power supply device according to claim 2, wherein when a space facing the module ends of the battery modules adjacent to each other is a wiring space, the communication line is wired in the wiring space, and a gap facing the module side surfaces of the battery modules adjacent to each other is a non-wiring space where the communication line is not wired. ### Claim 4 (depends on 2) The power supply device according to claim 2, wherein each of the battery modules includes a battery stack stacking a plurality of battery cells, end plates arranged on both ends of the battery stack, and bind bars that are arranged on both side surfaces of the battery stack to couple the end plates, each of the battery modules is an elongated rectangular-parallelepiped in a stacking direction of corresponding one of the battery cells, and ends in a longitudinal direction are module ends. ### Claim 5 (depends on 4) The power supply device according to claim 4, wherein, in the battery module, the cell monitor circuit is arranged on each of the end plates. ### Claim 6 (depends on 1) The power supply device according to claim 1, wherein, in the battery module, the connection part is arranged at one end. ### Claim 7 (depends on 6) The power supply device according to claim 6, wherein in the battery module, a pair of connection parts is arranged at one end, and the communication line is connected to the pair of connection parts. ### Claim 8 (depends on 1) An electric vehicle comprising: the power supply device according to claim 1; a motor for traveling that receives electric power from the power supply device; a vehicle body on which the power supply device and the motor are mounted; and wheels that are driven by the motor and cause the vehicle body to travel. ### Claim 9 (depends on 1) A power storage device comprising: the power supply device according to claim 1; a power supply controller that controls charging and discharging of the power supply device, wherein the power supply controller performs control for enabling charging of the battery cells by electric power from an outside and charging the battery cell. ### Claim 10 A power supply device comprising: a plurality of battery modules each including a plurality of battery cells; and a power line connecting the plurality of battery modules, wherein each of the battery modules includes a cell monitor circuit that detects battery information, a plurality of the cell monitor circuits are cascade-connected via a communication line, the cell monitor circuit includes a communication interface including a connection part for connecting the communication line to the communication interface, the communication interface sets a withstand voltage applied to the connection part to be a voltage higher than an output voltage of the power supply device, the communication interface includes a coupling element that blocks a direct current to cause an alternating current to pass on an output side of the communication interface, and a withstand voltage of the coupling element is higher than the output voltage of the power supply device. ### Claim 11 (depends on 10) The power supply device according to claim 10, wherein the communication line includes a non-parallel communication line connected to a cell monitor circuit of a battery module different from a battery module to which the power line is connected among the plurality of battery modules. ### Claim 12 (depends on 10) The power supply device according to claim 10, wherein the coupling element is any one of a coupling capacitor, a signal transmission transformer, and an optical transmission element. ### Claim 13 A power supply device comprising: a plurality of battery modules each including a plurality of battery cells; and a power line connecting the plurality of battery modules, wherein each of the battery modules includes a cell monitor circuit that detects battery information, a plurality of the cell monitor circuits are cascade-connected via a communication line, the cell monitor circuit includes a communication interface including a connection part for connecting the communication line to the communication interface, the communication interface sets a withstand voltage applied to the connection part to be a voltage higher than an output voltage of the power supply device, the plurality of the battery modules are arranged in multiple stages and multiple rows, vertical partitioned regions and horizontal partitioned regions are provided in a grid pattern between the battery modules adjacent to each other, any one of (i) the vertical partitioned regions and (ii) the horizontal partitioned regions are wiring spaces where the communication line is wired, and the other of (i) the vertical partitioned regions and (ii) the horizontal partitioned regions are non-wiring spaces where the communication line is not wired. ### Claim 14 (depends on 13) The power supply device according to claim 13, wherein each of the non-wiring spaces has a horizontal width narrower than a horizontal width of each of the wiring spaces. ### Claim 15 (depends on 13) The power supply device according to claim 13, wherein, in the battery module, the connection part is arranged at an end facing the wiring space.