# US 11,305,671 B2 · Method of controlling electric vehicle and electric vehicle system

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- Number: US 11,305,671 B2
- Document ID: US11305671B2
- Status: Granted
- Kind: B2
- Application number: 17/277,356
- Filed: 2018-09-26
- Published: 2022-01-27
- Granted: 2022-04-19
- Earliest claimed: 2018-09-26
- Assignees: Nissan Motor Co., Ltd.
- Applicants: Nissan Motor Co., Ltd.
- Inventors: Hideo Yoshida
- Web page: https://patentgrep.com/patent/US11305671B2

## CPC

- B60L 58/40: for controlling a combination of batteries and fuel cells
- B60L 1/006: {to power outlets}
- B60L 50/75: using propulsion power supplied by both fuel cells and batteries
- B60L 53/14: Conductive energy transfer
- B60L 53/20: characterised by converters located in the vehicle
- B60L 55/00: Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
- B60L 58/12: responding to state of charge [SoC]
- B60L 58/14: Preventing excessive discharging
- 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 7/855: {with circuits adapted for supplying loads from the battery}
- B60L 2210/10: DC to DC converters
- H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)}
- H02J 2101/30: Fuel cells
- H02J 2101/40: Hybrid power plants, i.e. a plurality of different generation technologies being operated at one power plant
- 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
- Y02T 90/40: Application of hydrogen technology to transportation, e.g. using fuel cells
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An electric vehicle including: a battery configured to store electric power; a motor electrically connected to the battery through a first wire; an external port connected to a second wire branched from the first wire, the external port being used for input/output of electric power from/to an external device; a converter provided between the external port and the first wire on the second wire; an electric generator provided on a third wire bypassing the converter from the second wire; a first switch provided on the third wire on the external port side relative to the electric generator; and a second switch provided on the third wire on an opposite side of the first switch relative to the electric generator. A method of controlling the electric vehicle, wherein in a case in which electric power generated by the electric generator is supplied to the external device, the first switch is turned OFF and the second switch is turned ON such that the electric power generated by the electric generator is supplied to the external device through the converter.

## Claims

### Claim 1

A method of controlling an electric vehicle, the electric vehicle including:
a battery configured to store electric power;
a motor electrically connected to the battery through a first wire;
an external port connected to a second wire branched from the first wire, the external port being used for input/output of electric power from/to an external device;
a converter provided between the external port and the first wire on the second wire;
an electric generator provided on a third wire bypassing the converter from the second wire;
a first switch provided on the third wire on the external port side relative to the electric generator; and
a second switch provided on the third wire on an opposite side of the first switch relative to the electric generator; wherein
in a case in which electric power generated by the electric generator is supplied to the external device, the first switch is turned OFF and the second switch is turned ON such that the electric power generated by the electric generator is supplied to the external device through the converter.

### Claim 2 (depends on 1)

The method of controlling the electric vehicle according to claim 1, wherein
in a case in which the electric power generated by the electric generator is supplied to at least one of the motor and the battery, the first switch is turned ON and the second switch is turned OFF such that the electric power generated by the electric generator is supplied to at least one of the motor and the battery through the converter.

### Claim 3 (depends on 1)

The method of controlling the electric vehicle according to claim 1, wherein
in a case in which the electric power is supplied to the external device from the electric generator and the battery, the first switch is turned ON and the second switch is turned OFF in a state in which the electric power is output from the battery such that the electric power supplied from the battery is supplied to the external device through the converter and the electric power generated by the electric generator is supplied to the external device.

### Claim 4 (depends on 3)

The method of controlling the electric vehicle according to claim 3, wherein
the electric generator is driven such that output voltage becomes equal to a required voltage of the external device, and
the electric power is output from the battery at an amount corresponding to a shortfall of the electric power generated by the electric generator for a required power of the external device.

### Claim 5 (depends on 1)

The method of controlling the electric vehicle according to claim 1, wherein
the electric vehicle further has:
an additional battery connected to the second wire between a junction point of the second wire with the first wire and a junction point of the second wire with the third wire on a side of the first wire among junction points of the second wire with the third wire; and
a third switch provided on the second wire between a junction point of the second wire with the additional battery and the junction point of the second wire with the first wire, and wherein
in a case in which the electric power generated by the electric generator is supplied to the additional battery, the first switch is turned ON, the second switch is turned OFF, and the third switch is turned OFF such that the electric power generated by the electric generator is stored in the additional battery through the converter.

### Claim 6 (depends on 1)

The method of controlling the electric vehicle according to claim 1, wherein the electric generator is a fuel cell.

### Claim 7 (depends on 6)

The method of controlling the electric vehicle according to claim 6, wherein
the fuel cell is a solid oxide fuel cell.

### Claim 8

An electric vehicle system comprising:
a battery configured to store electric power;
a motor electrically connected to the battery through a first wire;
an external port connected to a second wire branched from the first wire, the external port being used for supply/reception of electric power to/from an external device;
a converter provided between the external port and the first wire on the second wire;
an electric generator provided on a third wire bypassing the converter from the second wire;
a first switch of the second wire on the external port side relative to the electric generator on the third wire;
a second switch provided on an opposite side of the first switch relative to the electric generator on the third wire; and
a controller configured to control the battery, the electric generator, the first switch, and the second switch; wherein
the controller turns one switch of the first switch and the second switch ON and turns other switch OFF in a case in which electric power generated by the electric generator is supplied to the external device through the converter, and the controller turns the one switch OFF and turns the other switch ON in a case in which the electric power generated by the electric generator is supplied to at least one of the motor and the battery through the converter.