Electric vehicle control device

• US 9,211,803 B2
• Filed: 02/10/2012
• Issued: 12/15/2015
• Est. Priority Date: 03/31/2011
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Yonehana, Atsushi
• Primary Examiner(s): Ismail, Shawki S
• Assistant Examiner(s): Carrasquillo, Jorge L
• Application Number:
  US14/008,217
• Publication Number:
  US 20140015455A1
• Time in Patent Office: 1,404 Days
• Field of Search: 318/139, 320/10.1, 320/9.1, 320/139, 320/102, 320/103, 320/104, 320/109, 320/134, 320/136, 320/150, 320/137, 320/163, 320/293, 320/162, 320/155, 180/446, 180/65.29, 180/65.1, 180/65.8, 307/10.1
• US Class Current: 1/1
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• CPC Class Codes: B60K 2001/0455 Removal or replacement of the energy storages
• CPC Class Codes: B60K 2001/0461 from the side
• CPC Class Codes: B60L 1/00 Supplying electric power to auxiliary equipment of vehicles circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• 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 2200/12 Bikes
• CPC Class Codes: B60L 2210/12 Buck converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2220/46 Wheel motors, i.e. motor connected to only one wheel
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• 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 2250/16 by display
• CPC Class Codes: B60L 2250/24 by lever actuation
• CPC Class Codes: B60L 3/003 relating to inverters
• CPC Class Codes: B60L 3/0084 : relating to control modules
• CPC Class Codes: B60L 3/12 : Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 50/51 : characterised by AC-motors
• CPC Class Codes: B60L 50/64 : Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: B60L 50/66 : Arrangements of batteries
• CPC Class Codes: B60L 53/14 : Conductive energy transfer
• CPC Class Codes: B60L 58/10 : for monitoring or controlling batteries
• CPC Class Codes: B60L 58/12 : responding to state of charge [SoC]
• CPC Class Codes: B60L 58/21 : having the same nominal voltage
• CPC Class Codes: B60L 58/26 : by cooling
• CPC Class Codes: B60Y 2200/126 : Scooters
• CPC Class Codes: B62K 11/10 : characterised by the engine being over or beside driven rear wheel
• CPC Class Codes: B62K 2202/00 : Motorised scooters
• CPC Class Codes: B62K 2204/00 : Adaptations for driving cycles by electric motor
• CPC Class Codes: B62M 7/12 : with the engine beside or within the driven wheel
• 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

Abstract

Provided is an electric vehicle control device in which a power supply device has a simple structure. A BMU power supply device (110) lowers a battery voltage to be suitable for the control voltage of a BMU (109). A flyback down-regulator (80) lowers the battery voltage to be suitable for an input of a CPU power supply device (111) which forms a control voltage for a CPU (108). A contactor (90) is disposed on a plus-side line which connects a battery (40) to a motor drive circuit (100), and is opened and closed in response to an instruction from the CPU (108). Control power for the down-regulator (80) is formed by the BMU power supply device (110), and a main switch (113) is disposed to open and close a path through which the voltage of the control power is input to the down-regulator (80).

Claims

1. An electric vehicle control device having a motor drive circuit for driving a vehicle drive motor using power of a battery, a battery monitoring unit for monitoring a state of the battery, and a main CPU for controlling the motor drive circuit, the electric vehicle control device comprising:

a BMU power supply device configured to lower an output voltage of the battery to a value suitable for a control voltage for the battery monitoring unit;

a down-regulator configured to lower the output voltage of the battery to a value suitable for an input to a CPU power supply device which generates a control voltage for the main CPU;

a contactor provided on a plus-side line between the battery and the motor drive circuit so as to be opened and closed in response to an instruction of the main CPU; and

a main switch configured to open and close a passage through which a voltage of a control power is input to the down-regulator,

wherein the control power for the down-regulator is generated by the BMU power supply device,

wherein an output of the BMU power supply device is input to the down-regulator through the main switch as control power.

2. The electric vehicle control device according to claim 1, wherein the motor drive circuit, the battery monitoring unit, the main CPU, the BMU power supply device, the down-regulator, and the contactor are mounted on a single board to configure a control module.

3. The electric vehicle control device according claim 1, wherein the down-regulator is a flyback or forward type regulator.

4. The electric vehicle control device according to claim 1, wherein

the electric vehicle control device is used for an electric vehicle in which a driving wheel is supported by a swing arm configured to be vertically swung with reference to a vehicle body frame,

the swing arm comprises a main body case,

the vehicle drive motor, the battery, and a control module are disposed in the main body case of the swing arm,

a fuse is provided between a plus terminal of the battery and a plus terminal of the control module, and

minus terminals of the battery and the control module are earthed to the main body case of the swing arm.

5. The electric vehicle control device according to claim 4, wherein a board comprises a conductive pattern forming an earth line, and the control module is earthed to the main body case by coupling the conductive pattern to a case which is a conductive material of the control module using a screw.