# US 2014/0197788 A1 · Device for charging a battery of a motor vehicle on the basis of a single-phase power supply network, and method of controlling the device

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- Number: US 2014/0197788 A1
- Document ID: US20140197788A1
- Status: Published application
- Kind: A1
- Application number: 14/111,925
- Filed: 2012-04-12
- Published: 2014-07-17
- Earliest claimed: 2011-04-14
- Assignees: RENAULT s.a.s.
- Inventors: Mehdi Gati; Pedro Kvieska; Ahmed Ketfi-Cherif
- Web page: https://patentgrep.com/patent/US20140197788A1

## CPC

- H02J 7/02: for charging batteries from AC mains by converters
- B60L 3/0092: {with use of redundant elements for safety purposes}
- B60L 53/12: Inductive energy transfer
- B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
- B60L 53/24: Using the vehicle's propulsion converter for charging
- H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02M 1/4208: {Arrangements for improving power factor of AC input}
- H02J 2207/20: Charging or discharging characterised by the power electronics converter
- H02M 1/007: {Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826)}
- 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 10/92: Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
- Y02T 90/12: Electric charging stations
- Y02T 90/14: Plug-in electric vehicles
- 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
- 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)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A device for charging a battery, for example of an electric traction motor vehicle, based on a single-phase power supply network, the device including a filtering stage configured to be connected to the single-phase network, a voltage step-down stage connected to the filtering stage, a voltage step-up stage configured to be connected to the battery and coupled to the voltage step-down stage via an inductive component or an induction coil, and a regulating unit configured to impose chopping duty ratios on the voltage step-down stage and on the voltage step-up stage. The regulating unit compensates for phase shift between an input current of the voltage step-down stage and an input voltage of the voltage step-down stage.

## Claims

### Claim at position 1

1-7. (canceled)

### Claim 8

A device for charging a battery, or charging a battery of an electric-traction motor vehicle, from a single-phase power supply network, the device comprising:
a filtering stage configured to be connected to the single-phase network;
a voltage step-down stage connected to the filtering stage;
a voltage step-up stage configured to be connected to the battery and coupled to the voltage step-down stage via an inductive component or an inductance coil; and
a control unit configured to impose chopping duty cycles on the voltage step-down stage and the voltage step-up stage,
wherein the control unit includes means for compensating for a phase shift between an input current of the voltage step-down stage and an input voltage of the voltage step-down stage,
wherein the control unit includes a first open-loop control module configured to determine a chopping duty cycle of the voltage step-down stage as a function of a voltage of the single-phase power supply network, a setpoint power, and an intensity of current flowing through the inductive component, to compensate for the phase shift between the input current of the voltage step-down stage and the input voltage of the voltage step-down stage, and to control power received by the battery as a function of the setpoint power, and
wherein the control unit includes a second control module configured to determine a chopping duty cycle of the voltage step-up stage as a function of a voltage at an output of the voltage step-down stage, a voltage of the battery, and a difference between the setpoint induction intensity and the intensity of the current flowing through the inductive component, providing closed-loop control of an intensity of a current flowing through the battery.

### Claim 9 (depends on 8)

The device as claimed in claim 8, wherein the first open-loop control module includes a map providing an amplitude of the input current of the voltage step-down stage as a function of an amplitude of the input voltage and of the setpoint power.

### Claim 10 (depends on 8)

The device as claimed in claim 8, wherein the setpoint induction intensity is always greater than the intensity flowing through the battery and the intensity flowing through the inductive component.

### Claim 11 (depends on 8)

The device as claimed in claim 8, wherein the second control module includes a proportional-integral controller to which is sent the difference between the intensity of the current flowing through the inductive component and the setpoint inductance intensity, and overspeed protection means configured to deactivate the integral part of the controller if the chopping duty cycle determined by the second module is approximately equal to “0” or “1”.

### Claim 12 (depends on 8)

A motor vehicle with at least partial electrical traction, comprising:
an electric machine coupled to drive wheels and an inverter stage configured to power the electric machine;
a device as claimed in claim 8;
electrical connections and a switch of the voltage step-up stage of the device being included in the inverter stage, and the inductive component of the device being windings of the electric machine.

### Claim 13

A method for controlling charging of a battery, or a battery of a motor vehicle, from a single-phase network, in which an input voltage is filtered, electrical power is taken from a network to the battery via a voltage step-down stage and a voltage step-up stage coupled via an inductive component or an inductance coil, the method comprising:
compensating for a phase shift between an input current of the voltage step-down stage and an input voltage of the voltage step-down stage;
controlling the input current of the voltage step-down stage via an open-loop control of a chopping duty cycle of the voltage step-down stage as a function of a voltage of the single-phase power supply network, a setpoint power, and an intensity of the current flowing through the inductive component, to compensate for the phase shift between the input current of the voltage step-down stage and the input voltage of the voltage step-down stage, and to control power received by the battery as a function of the setpoint power; and
locking an intensity of a current flowing through the battery to a reference battery intensity via a closed-loop control of a chopping duty cycle of the voltage step-up stage as a function of a voltage at an output of the voltage step-down stage, a voltage of the battery, and a difference between a setpoint induction intensity and an intensity of the current flowing through the inductive component.

### Claim 14 (depends on 13)

The method as claimed in claim 13, wherein an integral part of a proportional-integral controller is deactivated if the chopping duty cycle is approximately equal to 0 or 1.