# US 11,077,770 B2 · Power supply device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,077,770 B2
- Document ID: US11077770B2
- Status: Granted
- Kind: B2
- Application number: 16/377,512
- Filed: 2019-04-08
- Published: 2019-11-28
- Granted: 2021-08-03
- Earliest claimed: 2018-05-23
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Noritake Mitsutani; Yasuhiro Taoka
- Web page: https://patentgrep.com/patent/US11077770B2

## CPC

- H02J 7/342: {The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68)}
- B60L 1/00: Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00)
- B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75)
- B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
- B60L 58/10: for monitoring or controlling batteries
- B60L 58/12: responding to state of charge [SoC]
- B60L 58/13: Maintaining the SoC within a determined range
- B60L 58/14: Preventing excessive discharging
- H02J 1/082: DC supplies with two or more different DC voltage levels
- H02J 1/10: Parallel operation of DC sources
- H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence)
- H02J 7/50: acting upon multiple batteries simultaneously or sequentially
- B60L 58/20: having different nominal voltages
- B60L 2210/10: DC to DC converters
- H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
- Y02T 10/62: Hybrid vehicles
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 10/72: Electric energy management in electromobility
- Y02T 90/14: Plug-in electric vehicles
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A power supply device is mountable to a vehicle and includes: a high-voltage battery; a low-voltage battery of which an output voltage is lower than that of the high-voltage battery, and which can be charged by output power from the high-voltage battery; and a control unit configured to perform charging/discharging control for the high-voltage battery and the low-voltage battery. The control unit performs feeding control for causing the high-voltage battery to supply power to a predetermined on-vehicle device while consumed power is higher than a predetermined value in a state in which a main switch of the vehicle is not on.

## Claims

### Claim 1

A power supply device mountable to a vehicle, the power supply device comprising:
a high-voltage battery;
a low-voltage battery of which an output voltage is lower than that of the high-voltage battery, and which can be charged by output power from the high-voltage battery; and
a control unit configured to:
perform charging/discharging control for the high-voltage battery and the low-voltage battery;
perform feeding control for causing the high-voltage battery to supply power to a predetermined on-vehicle device while consumed power is higher than a predetermined value in a state in which a main switch of the vehicle is not on;
perform supplementary charging for charging the high-voltage battery while the vehicle is running, so as to increase a charged amount for the high-voltage battery by a power storage amount corresponding to an amount of power, to be fed, which is an estimated amount of power to be supplied from the high-voltage battery to the predetermined on-vehicle device in the feeding control during a subsequent non-running time period, as compared to a case where the vehicle does not include the predetermined on-vehicle device; and
determine an amount of increase of a power storage amount of the high-voltage battery for the supplementary charging, an amount of reduction of a power storage amount of the high-voltage battery for the feeding control, and a required time such that an average fuel economy deterioration amount is less than or equal to a predetermined value as compared to a case where the feeding control and the supplementary charging are not performed.

### Claim 2 (depends on 1)

The power supply device according to claim 1, wherein the control unit determines the required time for the supplementary charging, based on the amount of power to be fed and a charging/discharging capability of a power supply device, and a trip time estimated from history of running.