# US 10,374,448 B2 · Vehicle power supply control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,448 B2 - Document ID: US10374448B2 - Status: Granted - Kind: B2 - Application number: 15/496,379 - Filed: 2017-04-25 - Published: 2017-11-02 - Granted: 2019-08-06 - Earliest claimed: 2016-04-28 - Assignees: Yazaki Corporation - Applicants: Yazaki Corporation - Inventors: Shuuji Satake; Yoshihito Aoki - Web page: https://patentgrep.com/patent/US10374448B2 ## CPC - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - B60L 1/08: Methods and devices for control or regulation - B60L 1/14: to electric lighting circuits - B60L 58/12: responding to state of charge [SoC] - B60R 16/0207: {Wire harnesses} - B60R 16/03: for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} - B60R 16/04: Arrangement of batteries - H02J 1/08: Three-wire DC power distribution systems; Systems having more than three wires - H02J 7/82: Control of state of charge [SOC] - H02J 2105/33: exchanging power with road vehicles - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A vehicle power supply control device includes a plurality of area power supply slaves connected with respective different device groups configured with a plurality of different devices installed in a vehicle, and controlling power supplied to the devices in the connected device groups, a plurality of area power supply masters that are connected with respective different area power supply slaves and control power supplied to the connected area power supply slaves, and a vehicle power supply master connected with the area power supply masters and a battery of the vehicle and controlling power supplied to the area power supply masters from the battery. ## Claims ### Claim 1 A vehicle power supply control device, comprising: a plurality of load power supply controllers that are connected with respective different load groups configured with a plurality of different loads installed in a vehicle, and configured to control power supplied to the loads in the connected load groups; a plurality of area power supply controllers that are connected with the respective different load power supply controllers and configured to control power supplied to the connected load power supply controllers; and a master power supply controller that is connected with the area power supply controllers and a power supply of the vehicle and configured to control power supplied to the area power supply controllers from the power supply, wherein when power consumption of the load groups connected through the load power supply controllers exceeds a target value in a power limit determined based on a power instruction value, the area power supply controllers control power consumption of the load group that does not exceed the target value with the power consumption of the load group controlled, and the area power supply controllers request the master power supply controller to change a power limit based on the power instruction value for the power consumption of the load group that still exceeds the target value with the power consumption of the load group controlled. ### Claim 2 (depends on 1) The vehicle power supply control device according to claim 1, wherein one of the area power supply controllers, the load power supply controllers connected to the area power supply controller, and the load groups connected to the load power supply controllers are installed in a same predetermined vehicle area. ### Claim 3 (depends on 2) The vehicle power supply control device according to claim 2, wherein the master power supply controller sets a power instruction value that limits power used by the load group for each of the area power supply controllers based on a status of the power supply and information relating to power consumption of the load groups connected to the area power supply controllers through the load power supply controller. ### Claim 4 (depends on 1) The vehicle power supply control device according to claim 1, wherein the master power supply controller sets the power instruction value that limits power used by the load group for each of the area power supply controllers based on a status of the power supply and information relating to power consumption of the load groups connected to the area power supply controllers through the load power supply controller. ### Claim 5 (depends on 4) The vehicle power supply control device according to claim 4, wherein the area power supply controllers control power supplied to the load group through the load power supply controller based on the power instruction value. ### Claim 6 (depends on 4) The vehicle power supply control device according to claim 4, wherein the master power supply controller sets a power control mode serving as the power instruction value and controlling operation of a load in the load group for each of the area power supply controllers. ### Claim 7 (depends on 5) The vehicle power supply control device according to claim 5, wherein the master power supply controller sets a power control mode serving as the power instruction value and controlling operation of a load in the load group for each of the area power supply controllers. ### Claim 8 (depends on 1) The vehicle power supply control device according to claim 1, wherein upon request of changing a power limit based on the power instruction value, the master power supply controller lowers a power limit in the area power supply controller requesting to change the power limit and enhances a power limit in an area power supply controller different from the area power supply controller requesting to change the power limit. ### Claim 9 (depends on 8) The vehicle power supply control device according to claim 8, wherein the master power supply controller sets a power control mode serving as the power instruction value and controlling operation of a load in the load group for each of the area power supply controllers. ### Claim 10 (depends on 1) The vehicle power supply control device according to claim 1, wherein the master power supply controller sets a power control mode serving as the power instruction value and controlling operation of a load in the load group for each of the area power supply controllers.