Charging Device, Electric-Powered Vehicle, and Charging System

• US 20090115251A1
• Filed: 11/14/2006
• Published: 05/07/2009
• Est. Priority Date: 11/22/2005
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nakamura, Makoto, Oyobe, Hichirosai, Ishikawa, Tetsuhiro
• Application Number:
  US12/084,983
• Publication Number:
  US 20090115251A1
• Time in Patent Office: Days
• US Class Current: 307/32
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 2001/005 the electric storage means
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 15/007 Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2220/54 Windings for different functions
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/24 Using the vehicle's propulsion converter for charging
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: B60L 58/25 by controlling the electric load
• CPC Class Codes: B60L 58/26 by cooling
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2510/246 Temperature
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/625 : Vehicles
• CPC Class Codes: H01M 10/63 : Control systems charging or discharging in response to temperature H01M10/44 , H01M10/443; measurement of temperature H01M10/48 , H01M10/486
• CPC Class Codes: H02J 2310/48 : for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: 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
• CPC Class Codes: H02J 7/0014 : Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/0042 : characterised by the mechanical construction
• CPC Class Codes: H02P 2201/09 : Boost converter, i.e. DC-DC step up converter increasing the voltage between the supply and the inverter driving the motor
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• 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 10/92 : Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles

Abstract

When charging of a power storage device from a commercial power supply is controlled, charging and cooling of the power storage device are performed in a timesharing manner. Specifically, when a temperature of the power storage device rises, a control device turns off a system main relay and stops a boost converter, and drives an inverter to operate a compressor (MC) for an air conditioner. When the power storage device is cooled down, the control device turns on the system main relay again and drives the boost converter, and stops the inverter.

Claims

1. A charging device for a vehicle, the charging device charging a power storage device mounted on the vehicle from a commercial power supply outside the vehicle, comprising:

an electric power input unit receiving commercial electric power supplied from said commercial power supply;

a charge control unit converting said commercial electric power input from said electric power input unit into electric power having a voltage level of said power storage device, and charging said power storage device;

a cooling device cooling said power storage device; and

a control unit driving said charge control unit and said cooling device in a timesharing manner.

2. The charging device for the vehicle according to claim 1, wherein said cooling device is driven by receiving said commercial electric power input from said electric power input unit.

3. The charging device for the vehicle according to claim 1, wherein said control unit controls said charge control unit and said cooling device such that cooling of said power storage device by said cooling device is prioritized over charging of said power storage device by said charge control unit.

4. The charging device for the vehicle according to claim 1, wherein said control unit controls said charge control unit and said cooling device such that each of charging electric power for said power storage device and electric power consumption by said cooling device is kept within a prescribed quantity.

5. The charging device for the vehicle according to claim 1, further comprising a relay device connected between said power storage device and said charge control unit and operating in accordance with a command provided from said control unit, wherein

said control unit

outputs a shutoff command to said relay device and outputs a drive command to said cooling device when said power storage device is cooled, and

outputs a connection command to said relay device and outputs a stop command to said cooling device when said power storage device is charged.

6. The charging device for the vehicle according to claim 1, wherein said cooling device includes an electric-powered air conditioner.

7. An electric-powered vehicle comprising:

a power storage device;

an electric motor generating a driving force for the vehicle by using electric power from said power storage device; and

the charging device for the vehicle recited in claim 1.

8. The electric-powered vehicle according to claim 7, further comprising

an internal combustion engine, and

another electric motor capable of generating electric power for driving said electric motor, by using power of said internal combustion engine.

9. The electric-powered vehicle according to claim 8, wherein

each of said electric motor and said other electric motor has a star-connected polyphase winding as a stator winding,

the electric power input unit in said charging device for the vehicle is connected to a neutral point of the polyphase winding of each of said electric motor and said other electric motor,

the charge control unit in said charging device for the vehicle includes first and second inverters provided to correspond to said electric motor and said other electric motor, respectively, and

said first and second inverters convert the commercial electric power provided to the neutral points of the polyphase windings of said electric motor and said other electric motor by said electric power input unit into direct-current electric power for charging said power storage device, respectively.

10. A charging system comprising:

a plurality of electric-powered vehicles each including the charging device for the vehicle recited in claim 1; and

charging equipment allowing said plurality of electric-powered vehicles to be connected thereto, and outputting the commercial electric power supplied from the commercial power supply, to at least one of said plurality of electric-powered vehicles,

said charging equipment including an electric power control unit controlling electric power output to said plurality of electric-powered vehicles such that a total sum of the electric power output to said plurality of electric-powered vehicles is kept within a prescribed quantity.

11. The charging system according to claim 10, wherein

each of said plurality of electric-powered vehicles further includes

a state quantity calculation unit calculating a state quantity indicating a state of charge of said power storage device, and

an output unit outputting the state quantity calculated by said state quantity calculation unit to said charging equipment, wherein

said electric power control unit preferentially outputs said commercial electric power to the electric-powered vehicle having the smallest state quantity among said state quantities received from said plurality of electric-powered vehicles.