RECHARGING SYSTEM OF HYBRID VEHICLE

• US 20150197156A1
• Filed: 11/12/2014
• Published: 07/16/2015
• Est. Priority Date: 07/09/2010
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Jang, Ki-young, Song, Hong-seok, Joo, Junghong
• Granted Patent: US 9,649,943 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2220/42 with use of more than one motor
• CPC Class Codes: B60L 2220/54 Windings for different functions
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/60 using power supplied by batteries in combination with fuel cells B60L50/75
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/24 Using the vehicle's propulsion converter for charging
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02P 2209/01 Motors with neutral point connected to the power supply
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: 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]

Abstract

A system for recharging a hybrid vehicle is provided with two motors and supplies commercial electricity to neutral points of the motors when a connection of a recharging stand is detected, forms an electricity loop through the neutral points of the first motor and the second motor according to a phase of the commercial electricity, and carries out a recharging mode by detecting at least a voltage of a DC link capacitor in a voltage converter, a voltage of a smoothing capacitor, and a battery voltage. According to the system, a current control value or a voltage control value is selected according to the recharging mode in order to recharge a battery based on the current control value or the voltage control value.

Claims

1-9. -9. (canceled)

10. A recharging system of a hybrid vehicle, comprising:

a battery in which DC voltage is stored or for outputting the DC voltage;

first and second motors configured to function as an electric motor or a generator;

first and second inverters for operating the first and second motors respectively;

a voltage converter for raising or lowering the DC voltage of the battery such that the raised or lowered DC voltage is supplied to the first and second inverters, in order to raise or lower the DC voltage supplied from the first and second inverters such that the raised or lowered DC voltage is supplied to the battery, and provided with a DC link;

first and second diodes each provided with an anode terminal connected to a negative terminal of the first and second inverters, and a cathode terminal connected to a source of commercial electricity and connected in parallel to first and second neutral points of the first and second motors;

a recharging controller for carrying out a recharging mode by detecting at least one of a phase of the commercial electricity supplied to the first and second neutral points of the first and second motors, a voltage of a DC link capacitor connecting the voltage converter and the first and second inverters, a battery voltage, a voltage of a smoothing capacitor connected at both terminals of the battery, a battery current, and a current flowing from the voltage converter to the battery, and controlling the voltage converter through a PWM duty according to the recharging mode of the battery such that the voltage of the DC link capacitor is raised or lowered, and is supplied to the battery;

a main relay selectively connecting the battery with the voltage converter;

a recharging port selectively connecting the commercial electricity disposed at an exterior of the vehicle to the first and second diodes;

a connection detector for detecting a connection of the commercial electricity; and

an input terminal switch mounted between the recharging port and the first and second motors and selectively connecting the commercial electricity to the first and second neutral points of the first and second motors by control of the recharging controller.

11. The recharging system of claim 10, wherein the input terminal switch comprises:

a first relay connected to the first diode and the first neutral point of the first motor; and

a second relay connected to the second diode and the second neutral point of the second motor.

12. The recharging system of claim 11, wherein the recharging controller performs an initial activation thereof, switches on the main relay, and switches off the input terminal switch so as to pre-recharge the DC link by means of the battery voltage in a case that the connection detector detects the connection of the commercial electricity.

13. The recharging system of claim 12, wherein the recharging controller switches on the input terminal switch and controls a recharge of the battery according to the recharging mode in a case that the pre-recharge of the DC link is completed.

14. The recharging system of claim 13, wherein the recharging controller decides the current control value and controls the charging current of the battery to follow the current control value in a case that the recharging mode of the battery is the current control mode.

15. The recharging system of claim 13, wherein the recharging controller decides a voltage control value required for maintaining the voltage of the smoothing capacitor to be constant and controls the voltage converter based on the voltage control value so as to recharge the battery in a case that the recharging mode of the battery is not the current control mode.

16. The recharging system of claim 10, wherein the input terminal switch comprises:

a first relay connected to the first diode and the first neutral point of the first motor;

a second relay connected to the second diode and the second neutral point of the second motor; and

a third relay connected in parallel with the first relay and connected in series with a resistance.

17. The recharging system of claim 16, wherein the recharging controller performs an initial activation thereof, switches on the second and third relays of the input terminal switch so as to form a low current loop, and pre-recharges the DC link by using an electricity of the low current loop in a case that the connection detector detects the connection of the commercial electricity.

18. The recharging system of claim 17, wherein the recharging controller switches off the third relay, switches on the first relay, and switches on the main relay so as to recharge the battery by using the normal commercial electricity in a case that the pre-recharge of the DC link is completed.

19. The recharging system of claim 18, wherein the recharging controller discharges the voltage of the DC link capacitor to be lower than a reference voltage to the battery in a case that a disconnection of the commercial electricity is detected during recharge or after the recharge is completed.