# US 11,027,612 B2 · Vehicle power supply system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,612 B2 - Document ID: US11027612B2 - Status: Granted - Kind: B2 - Application number: 16/746,760 - Filed: 2020-01-17 - Published: 2020-08-20 - Granted: 2021-06-08 - Earliest claimed: 2019-02-19 - Assignees: Yazaki Corporation - Applicants: Yazaki Corporation - Inventors: Kazuhiro Kubota; Masato Sasahara; Masataka Komiyama; Yoshihito Aoki; Takaaki Izawa - Web page: https://patentgrep.com/patent/US11027612B2 ## CPC - B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors} - B60R 16/03: for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} - B60L 3/0069: {relating to the isolation, e.g. ground fault or leak current} - B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H) - B60R 16/033: characterised by the use of electrical cells or batteries (for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36) - H02H 3/243: {for DC systems} - H02H 7/268: {for DC systems} - H02J 1/086: {for providing alternative feeding paths between load or loads and source or sources when the main path fails} - B60L 2240/547: Voltage - H02H 3/087: for DC applications - H02J 2105/33: exchanging power with road 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 - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract A vehicle power supply system includes a power supply path, and an ECU detaching a fault occurrence portion occurring in a part of the power supply path from the power supply path based on a set value lower than a lowest operation voltage of a load and a voltage related to the power supply path. The set value is set within a normal range of the voltage related to the power supply path. The power supply path includes a plurality of electrical connection units connected to the load and a plurality of connection wirings connecting each of the electrical connection units in a loop shape. In a case that a part of voltages related to each of the connection wirings is equal to or less than the set value, the control unit supplies power to the load via another part of the voltages related to each of the connection wirings. ## Claims ### Claim 1 A vehicle power supply system for distributing power supplied from a power supply to a load, the vehicle power supply system comprising: a power supply path that supplies power supplied from the power supply to the load; a control unit that detaches a fault occurrence portion occurring in a part of the power supply path from the power supply path based on a set value lower than a lowest operation voltage of the load and a voltage related to the power supply path, wherein the set value is set within a normal range of the voltage related to the power supply path, wherein the power supply path includes a plurality of electrical connection units connected to the load and a plurality of connection wirings that connect each of the electrical connection units in a loop shape, wherein in a case that a part of voltages related to each of the connection wirings is equal to or less than the set value, the control unit supplies power to the load via another part of the voltages related to each of the connection wirings, wherein each of the electrical connection units includes: a first voltage sensor; a first cut-off switch connected in series adjacent to the first voltage sensor; a second cut-off switch connected in series with the first cut-off switch; and a second voltage sensor connected in series adjacent to the second cut-off switch, the connection wiring connects the first voltage sensor included in one of the electrical connection units adjacent to another of the electrical connection units and the second voltage sensor included in the other of the electrical connection units, and the control unit opens the first cut-off switch adjacent to the first voltage sensor by which a lowest voltage is detected among voltages equal to or lower than the set value that are detected by the first voltage sensor in each of the electrical connection units, and opens the second cut-off switch adjacent to the second voltage sensor by which a lowest voltage is detected among voltages that are detected by the second voltage sensor in each of the electrical connection units. ### Claim 2 (depends on 1) The vehicle power supply system according to claim 1, further comprising an internal wiring that connects the first cut-off switch and the second cut-off switch in series; and a branch wiring that branches from the internal wiring and is connected to the load.