Vehicle control device and vehicle control method

• US 8,818,598 B2
• Filed: 07/05/2010
• Issued: 08/26/2014
• Est. Priority Date: 07/05/2010
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Izumi, Junta
• Primary Examiner(s): Jabr, Fadey
• Assistant Examiner(s): WEEKS, MARTIN A
• Application Number:
  US13/702,819
• Publication Number:
  US 20130096760A1
• Time in Patent Office: 1,513 Days
• Field of Search: 701/22
• US Class Current: 701/22
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/12 by confirmation, e.g. of the input
• CPC Class Codes: B60L 2250/24 by lever actuation
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/65 : involving identification of vehicles or their battery types
• CPC Class Codes: B60L 58/15 : Preventing overcharging
• CPC Class Codes: B60L 58/21 : having the same nominal voltage
• CPC Class Codes: B60L 58/25 : by controlling the electric load
• CPC Class Codes: H01M 10/44 : Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/48 : Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H02J 2207/20 : Charging or discharging characterised by the power electronics converter
• 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 7/007182 : in response to battery voltage
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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 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: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• 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]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

ECU executes a program including a step of executing first charging control when a charging plug and a charging device are connected, a step of terminating the first charging control when CCV is more than or equal to a threshold value OCV, a step of executing second charging control, and a step of terminating the second charging control when charging is completed.

Claims

1. A vehicle control device mounted on a vehicle including a rotating electric machine serving as a drive source, a power storage device for supplying electric power to said rotating electric machine, and a charging device for charging said power storage device through use of an external power supply, comprising:

an electronic detection unit configured to detect a real voltage of said power storage device; and

an electronic control unit configured to execute a first charging control for charging said power storage device at an upper limit value of charging electric power through use of said external power supply when said external power supply and said charging device are connected,

said control unit comparing said real voltage detected by said detection unit during execution of said first charging control and a first threshold value which is an open circuit voltage of said power storage device when a charged state of said power storage device is a target charged state, and terminating said first charging control when said real voltage is more than or equal to said first threshold value, said control unit executing second charging control for charging said power storage device setting charging electric power to be constant after said first charging control is terminated, and terminating said second charging control when said real voltage detected by said detection unit during execution of said second charging control is more than or equal to a second threshold value,

said second threshold value being a real voltage during execution of said second charging control corresponding to a case where the charged state of said power storage device is a fully charged state, and being a value larger than said first threshold value.

2. The vehicle control device according to claim 1, wherein said control unit executes said first charging control while setting the upper limit value of said charging electric power at a smaller one of an upper limit value of charging electric power based on the state of said charging device and an upper limit value of charging electric power that can be received in said power storage device.

3. The vehicle control device according to claim 1, wherein said target charged state is a fully charged state of said power storage device.

4. The vehicle control device according to claim 1, wherein, when the upper limit value of said charging electric power is restricted to be smaller than a standard value based on the state of said charging device and the state of said power storage device, said control unit terminates said first charging control when said real voltage detected by said detection unit during execution of said first charging control is more than or equal to said first threshold value.

5. The vehicle control device according to claim 1, wherein said control unit terminates said second charging control when said charging electric power is smaller than or equal to a predetermined value.

6. A vehicle control method for a vehicle including a rotating electric machine serving as a drive source, a power storage device for supplying electric power to said rotating electric machine, and a charging device for charging said power storage device through use of an external power supply, comprising the steps of:

detecting a real voltage of said power storage device;

executing first charging control by an electronic control unit for charging said power storage device at an upper limit value of charging electric power through use of said external power supply when said external power supply and said charging device are connected;

comparing said real voltage detected by said step of detecting said real voltage during execution of said first charging control and a first threshold value which is an open circuit voltage of said power storage device when a charged state of said power storage device is a target charged state, and terminating said first charging control when said real voltage is more than or equal to said first threshold value; and

executing second charging control by an electronic control unit for charging said power storage device setting charging electric power to be constant after said first charging control is terminated, and terminating said second charging control when said real voltage detected by said step of detecting the real voltage during execution of said second charging control is more than or equal to a second threshold value,

said second threshold value being a real voltage during execution of said second charging control corresponding to a case where the charged state of said power storage device is a fully charged state, and being a value larger than said first threshold value.