# US 9,520,806 B2 · Power supply device for supplying power to a load by combining a secondary battery and a capacitor

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- Number: US 9,520,806 B2
- Document ID: US9520806B2
- Status: Granted
- Kind: B2
- Application number: 14/649,616
- Filed: 2012-12-04
- Published: 2015-11-12
- Granted: 2016-12-13
- Earliest claimed: 2012-12-04
- Assignees: Volvo Truck Corporation
- Applicants: Volvo Truck Corporation
- Inventors: Yoshiaki Yamada; Takayuki Tsuchiya; Kunihiko Hikiri; Kouichi Itani; Noriaki Miyake
- Web page: https://patentgrep.com/patent/US9520806B2

## CPC

- B60L 58/12: responding to state of charge [SoC]
- B60L 7/14: for vehicles propelled by AC motors
- B60L 15/007: {Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles}
- B60L 50/40: using propulsion power supplied by capacitors
- B60L 50/51: characterised by AC-motors
- B60L 58/20: having different nominal voltages
- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- H01M 16/00: Structural combinations of different types of electrochemical generators
- H02J 7/345: {using capacitors as storage or buffering devices}
- H02M 3/335: using semiconductor devices only
- H02M 7/537: using semiconductor devices only, e.g. single switched pulse inverters
- H02M 7/5387: in a bridge configuration
- B60L 2210/10: DC to DC converters
- B60L 2240/547: Voltage
- B60L 2240/549: Current
- 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]
- H02J 2207/20: Charging or discharging characterised by the power electronics converter
- H02M 1/0067: {Converter structures employing plural converter units, other than for parallel operation of the units on a single load}
- H02M 1/0083: {Converters characterised by their input or output configuration}
- H02M 1/0093: {wherein the output is created by adding a regulated voltage to or subtracting it from an unregulated input}
- H02M 7/4803: {with means for reducing DC component from AC output voltage}
- Y02E 60/10: Energy storage using batteries
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/72: Electric energy management in electromobility
- 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
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A power supply device for supplying power to a load by combining a secondary battery and a capacitor connected in parallel to the secondary battery includes an insulation type DC-DC converter with a primary coil connected in parallel to the secondary battery and configured to accumulate energy by a current supplied from the secondary battery and a secondary coil connected in series to the capacitor and configured such that an induction current flows therein by the accumulated energy from the primary coil.

## Claims

### Claim 1

A power supply device configured to supply power to a load by combining a secondary battery and a capacitor connected in parallel to the secondary battery, the power supply device comprising:
an insulation type DC-DC converter including a primary coil and a secondary coil, the primary coil being connected in parallel to the secondary battery, the primary coil being configured to accumulate energy by a current supplied from the secondary battery, the secondary coil being connected in series to the capacitor, the secondary coil being configured such that an induction current flows therein by the accumulated energy from the primary coil;
wherein a current from the secondary battery is directly supplied to the primary coil and the insulation type DC-DC converter is configured to adjust an output voltage to be output from the secondary coil so that a sum of the output voltage and a voltage of the capacitor becomes equal to a voltage of the secondary battery.

### Claim 2 (depends on 1)

The power supply device according to claim 1, wherein:
the insulation type DC-DC converter is a flyback converter, the flyback converter being configured to adjust an output voltage to be output from the secondary coil so that the sum of the output voltage and a voltage of the capacitor becomes a set voltage.

### Claim 3 (depends on 1)

The power supply device according to claim 1, wherein:
the load is an inverter configured to drive an electric motor by the supply of power from the secondary battery and the capacitor.