# US 12,224,615 B2 · Composite charging system and method

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- Number: US 12,224,615 B2
- Document ID: US12224615B2
- Status: Granted
- Kind: B2
- Application number: 18/011,790
- Filed: 2021-11-19
- Published: 2023-08-03
- Granted: 2025-02-11
- Earliest claimed: 2021-05-14
- Assignees: Hyosung Corporation
- Applicants: Hyosung Corporation
- Inventors: Byung Hwan Jeong; Jeong Min Lee; Byeng Joo Byen
- Web page: https://patentgrep.com/patent/US12224615B2

## CPC

- H02J 7/971: {the charge cycle being controlled or terminated in response to non-electric parameters}
- B60L 53/30: Constructional details of charging stations
- B60L 53/50: Charging stations characterised by energy-storage or power-generation means
- B60L 53/64: Optimising energy costs, e.g. responding to electricity rates
- G06Q 50/06: Energy or water supply
- H01M 8/04201: {Reactant storage and supply, e.g. means for feeding, pipes}
- H01M 8/04925: {Power, energy, capacity or load}
- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- H01M 16/006: {of fuel cells with rechargeable batteries}
- H02J 3/32: using batteries or super capacitors with converting means
- H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence)
- B60L 53/305: {Communication interfaces}
- B60L 53/63: in response to network capacity
- B60L 53/65: involving identification of vehicles or their battery types
- B60L 58/40: for controlling a combination of batteries and fuel cells
- B60L 2210/10: DC to DC converters
- B60L 2210/30: AC to DC converters
- H01M 2250/20: Fuel cells 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
- 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 90/12: Electric charging stations
- 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
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- 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 present invention relates to a composite charging system and method capable of producing charging power for an electric vehicle by utilizing hydrogen energy supplied to a hydrogen vehicle, and compositely connecting hydrogen energy with a power system to efficiently perform charging of the electric vehicle, and more flexibly coping with the use of energy. The composite charging system according to the present invention comprises: a hydrogen charger which charges hydrogen into a vehicle; a hydrogen power supply system which generates and supplies power on the basis of hydrogen; a system power supply system which supplies power from a power system; an electric charger which charges the electric vehicle; and a battery power supply system which stores power supplied from the hydrogen power supply system and the system power supply system, and supplies the stored power to the electric charger.

## Claims

### Claim 1

A composite charging system, comprising:
a hydrogen charger for charging hydrogen to a vehicle;
a hydrogen-based power supply system for generating and supplying power based on hydrogen;
a power grid-based supply system for supplying power from a power grid;
an electrical charger for charging an electric vehicle; and
a battery power supply system for storing power supplied from the hydrogen-based power supply system and the power grid-based supply system, and supplying the stored power to the electrical charger,
wherein the battery power supply system includes: an energy storage system (ESS) for storing power and discharging the stored power; and a DC-DC converter for storing power supplied from the hydrogen-based power supply system and the power grid-based supply system, and converting a DC voltage outputted from the ESS to a DC voltage required for input to the electrical charger,
wherein time zones comprise an off-peak time, a peak time, and a high-peak time, based on a cost of the power supplied from the power grid,
wherein the off-peak time is a time zone where an electricity rate is the cheapest, and the high-peak time is a time zone where the cost of the power supplied is the highest, and the peak time is a time zone which is located between the off-peak time and the high-peak time,
wherein the ESS is charged through the power grid-based supply system during the off-peak time, and the ESS is charged through the hydrogen-based power supply system during the peak time and the high-peak time,
wherein, in the off-peak time, as a result of comparison between a charging cost through the power grid-based supply system during the off-peak time and the charging cost through the hydrogen-based power supply system, when the charging cost through the power grid-based supply system during the off-peak time is lower than the charging cost through the hydrogen-based power supply system, and when a residual capacity of hydrogen stored in a hydrogen tank is bigger than a predetermined level, power is charged from the power grid-based supply system, and when a second charging cost is lower than a first charging cost, power is charged from the hydrogen-based power supply system,
wherein in the peak time, as a result of comparison between the charging cost through the power grid-based supply system during the peak time and the charging cost through the hydrogen-based power supply system, when the charging cost through the power grid-based supply system during the peak time is lower than the charging cost through the hydrogen-based power supply system, and when the residual capacity of hydrogen stored in the hydrogen tank is bigger than the predetermined level, power is charged from the power grid-based supply system, and when the second charging cost is lower than the first charging cost, power is charged from the hydrogen-based power supply system,
wherein in the high-peak time, as a result of comparison between the charging cost through the power grid-based supply system during the high-peak time and the charging cost through the hydrogen-based power supply system, when the charging cost through the power grid-based supply system during the high-peak time is lower than the charging cost through the hydrogen-based power supply system, and when the residual capacity of hydrogen stored in the hydrogen tank is bigger than the predetermined level, power is charged from the power grid-based supply system, and when the second charging cost is lower than the first charging cost, power is charged from the hydrogen-based power supply system,
wherein, regardless of when the charging cost through the hydrogen-based power supply system is lower than the charging cost through the power grid-based supply system, charging is performed through the power grid-based supply system when the residual capacity of hydrogen stored in the hydrogen tank is less than the predetermined level,
wherein the charging cost through the hydrogen-based power supply system is differently set depending on a unit price of purchasing hydrogen when the hydrogen is charged in the hydrogen tank, or periodically updated.

### Claim 2 (depends on 1)

The system of claim 1, wherein the hydrogen-based power supply system includes: a hydrogen tank for storing hydrogen; a hydrogen power generator for generating power from the hydrogen; and a DC-DC converter for converting a DC voltage outputted from the hydrogen power generator to a DC voltage required for input to the electrical charger.

### Claim 3 (depends on 1)

The system of claim 1, wherein the power grid-based supply system includes: a grid matcher for matching the power grid with a transformer; and an AC-DC converter for converting an AC voltage outputted from the grid matcher to a DC voltage required for input to the electrical charger.