# US 12,179,927 B2 · Battery charge difference calculation system

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- Number: US 12,179,927 B2
- Document ID: US12179927B2
- Status: Granted
- Kind: B2
- Application number: 18/101,587
- Filed: 2023-01-26
- Published: 2023-09-21
- Granted: 2024-12-31
- Earliest claimed: 2022-03-17
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Takeshi Matsumoto
- Web page: https://patentgrep.com/patent/US12179927B2

## CPC

- H02J 7/855: {with circuits adapted for supplying loads from the battery}
- B60L 50/66: {Arrangements of batteries}
- B60L 58/12: responding to state of charge [SoC]
- B64D 27/34: All-electric aircraft
- B64D 27/357: using batteries
- B64D 31/16: for electric power plants
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H02J 1/108: having arrangements for blocking reverse current flow, e.g. using diodes (H02J1/12 takes precedence)
- B60L 58/21: having the same nominal voltage
- B60L 2200/10: Air crafts
- B64D 2221/00: Electric power distribution systems onboard aircraft
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- 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
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The power supply device includes a power generator, a drive source, a plurality of batteries, a difference calculating unit 11, a difference summing unit 12 and an electric power summing unit 13. The difference calculating unit 11 is configured to calculate differences between target amounts of electric power Q1, Q2, Q3, and Q4 of each battery and measured amounts of electric power M1, M2, M3, and M4. The difference summing unit 12 is configured to sum the differences in electric power of the batteries calculated by the difference calculating unit 11. The electric power summing unit 13 is configured to sum electric power calculated by the difference summing unit 12 and electric power required for the electric motors. A control unit 9 controls the drive source such that electric power calculated by the electric power summing unit 13 is generated by the power generator.

## Claims

### Claim 1

A power supply device comprising:
a power generator;
a drive source that drives the power generator;
a plurality of power supply lines that supply electric power generated by the power generator to a plurality of electric loads;
a plurality of batteries that are connected to the corresponding power supply lines upstream from the corresponding electric loads in an electric power supply direction;
a diode that is provided upstream from the battery in the corresponding power supply line and allows electric power to flow in only one direction from upstream to downstream of the power supply line;
a difference calculating unit configured to calculate a difference between target electric power set for each battery and measured electric power;
a difference summing unit configured to sum the difference in electric power of the batteries of the power supply lines calculated by the difference calculating unit; and
an electric power summing unit configured to sum electric power calculated by the difference summing unit and electric power required for the electric loads,
wherein the drive source is controlled such that electric power calculated by the electric power summing unit is generated by the power generator.

### Claim 2 (depends on 1)

The power supply device according to claim 1, wherein the power supply device is a power supply of an electric propulsion flying object, and
wherein the electric loads are electric motors for causing propellers of the flying object to rotate.