# US 10,479,210 B2 · Electric vehicle charging station and method for controlling an electric vehicle charging station

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- Number: US 10,479,210 B2
- Document ID: US10479210B2
- Status: Granted
- Kind: B2
- Application number: 15/747,412
- Filed: 2016-08-04
- Published: 2018-08-02
- Granted: 2019-11-19
- Earliest claimed: 2015-08-04
- Assignees: Wobben Properties GmbH
- Applicants: Wobben Properties GmbH
- Inventors: Alfred Beekmann
- Web page: https://patentgrep.com/patent/US10479210B2

## CPC

- B60L 53/14: Conductive energy transfer
- B60L 53/11: {DC charging controlled by the charging station, e.g. mode 4}
- B60L 53/31: Charging columns specially adapted for electric vehicles
- B60L 53/53: Batteries
- B60L 53/63: in response to network capacity
- B60L 55/00: Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
- H02J 3/322: {the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging}
- 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
- H02J 7/70: characterised by the mechanical construction
- H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
- Y02E 60/00: Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- 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
- Y02T 90/14: Plug-in electric vehicles
- Y02T 90/16: Information or communication technologies improving the operation of electric vehicles
- Y04S 10/126: the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
- 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
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

An electric vehicle charging station is provided. The electric vehicle charging station includes an interface, by way of which the charging station receives energy from an electrical energy supply grid, an energy intermediate storage device for intermediate storage of energy received or transmitted by way of the interface from the electrical energy supply grid, a plurality of output connections for charging electric vehicles and a control unit for controlling the energy intermediate storage in the energy intermediate storage device and for controlling the delivery of energy by way of the plurality of output connections. The control unit is configured to pass energy from the energy intermediate storage device to the plurality of output connections when the energy drawn at the output connections cannot be made available completely using the interface to the electrical energy supply grid.

## Claims

### Claim 1

An electric vehicle charging station, comprising:
an interface, between the charging station and an electrical energy supply grid, for the charging station to receive energy from and transmit energy to the electrical energy supply grid,
an energy intermediate storage device for intermediate storage of the energy transmitted to or received from the electrical energy supply grid using the interface,
a plurality of output connections for charging electric a plurality of vehicles simultaneously, and
a control unit for controlling intermediate energy storage in the energy intermediate storage device and for controlling delivery of energy using the plurality of output connections in a first operational mode charging the plurality of electrical vehicles coupled to the plurality of output connections with energy from the electrical supply grid via the interface,
wherein the control unit is configured to, in a second operating mode, cause energy to be provided from the energy intermediate storage device to the plurality of electrical vehicles coupled to the output connections if the energy drawn at the plurality of output connections cannot be provided completely by the electrical energy supply grid via the interface,
wherein the control unit is configured to, in a third operating mode and based on a first fault in the electrical energy supply grid, initiate energy intake from the electrical energy supply grid by the intermediate storage device, to remove excess energy from the electrical supply grid to support the electrical supply grid during the first fault, and
wherein the control unit is configured to, in a fourth operating mode and based on a second fault in the electrical energy supply grid, initiate an energy delivery from the intermediate storage device into the electrical energy supply grid to provide additional energy to the electrical supply grid to support the electrical supply grid during the second fault.

### Claim 2 (depends on 1)

The electric vehicle charging station according to claim 1, wherein the first fault in the energy supply grid is an overfrequency of a grid frequency of the electrical energy supply grid, and wherein the control unit is configured to cause energy to be taken from the electrical energy supply grid and stored in the intermediate storage device during the first fault.

### Claim 3

A method of controlling a plurality of electric vehicle charging stations, comprising:
receiving energy from or transmitting energy to an electrical energy supply grid using an interface between the electrical energy supply grid and the plurality of electric vehicle charging stations,
storing, in an energy intermediate storage device, energy transmitted to or received from the electrical energy supply grid over the interface,
charging a plurality of electric vehicles at a plurality of output connections, respectively,
controlling, by a control unit, energy storage in the energy intermediate storage device,
in a first operating mode controlling, by a control unit, delivery of energy to the plurality of electrical vehicles using the plurality of output connections with energy received via the interface,
in a second operating mode passing energy from the energy intermediate storage device to the plurality of output connections if the energy received at the output connections is not sufficient to charge the plurality of electric vehicles,
in a third operating mode initiating energy intake, from the electrical energy supply grid by the intermediate storage device, based on a first fault in the electrical energy supply grid to support the electrical supply grid during the first fault, and
in a fourth operating mode initiating energy delivery, from the intermediate storage device into the electrical energy supply grid, based on a second fault in the electrical energy supply grid to support the electrical supply grid during the second fault.

### Claim 4 (depends on 3)

The method of controlling the at least one electric vehicle charging station according to claim 3, wherein:
the first fault is an overfrequency of a grid frequency in the electrical energy supply grid, and the method of controlling the at least one electric vehicle charging station further comprises:
taking energy from the electrical energy supply grid and storing the energy in the intermediate storage device, and
initiating, by a central control unit, drawing energy from the electrical energy supply grid by a plurality of electric vehicle charging stations based on detection of the first fault in the electrical energy supply grid.