Power supply control device for electric vehicle

• US 5,717,310 A
• Filed: 11/25/1996
• Issued: 02/10/1998
• Est. Priority Date: 12/08/1995
• Status: Expired due to Term

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Sakai, Kouji, Kondo, Shugo, Jinzai, Hideyuki
• Primary Examiner(s): TSO, EDWARD H
• Application Number:
  US08/755,641
• Time in Patent Office: 442 Days
• Field of Search: 320/6, 320/10, 320/11, 320/12, 320/14, 320/15, 320/16, 320/17, 320/27, 320/29, 320/30, 320/39, 320/56, 320/48, 320/43
• US Class Current: 307/10.1
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: G01R 31/006 on road vehicles, e.g. automobiles or trucks testing of ignition installations peculiar to internal combustion engines F02P17/00
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• 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 90/14 Plug-in electric vehicles
• CPC Class Codes: Y10S 320/10 Nonbattery load controls charging

Abstract

A power supply control device for an electric vehicle capable of reducing the power consumption in a battery monitor assembly adapted for monitoring a residual electric charge in a main battery 4. In response to an operation which causes increasing or decreasing the residual charge in the main battery 4, a start-up unit 200 produces a start-up demand pulse P3. Upon receiving the start-up demand pulse P3, a power supply controller circuit 60 closes a switch 59 to allow the power from a sub battery 5 to be supplied the battery monitor assembly 100. When the battery monitor assembly 100 is activated, its power supply maintaining means 102 delivers a self-hold signal S4 to maintain the switch 59 being closed. The battery monitor assembly 100 keeps monitoring the residual charge in the main battery 4 while it is energized by the sub battery 5.

Claims

1. A power supply control device for an electric vehicle comprising:

a battery for supplying power to each component of the electric vehicle;

a battery monitoring means for monitoring the residual electric charge in the battery;

a power supply controlling means for controlling the power supplied to the battery monitoring means;

a starting means for producing a start-up demand for activating the power supply controlling means; and

wherein the power supply controlling means is responsive to the start-up demand for starting the power supplied to the battery monitoring means.

2. A power supply control device for an electric vehicle comprising:

a battery for supplying power to each component of the electric vehicle;

a battery monitoring means for monitoring the residual electric charge in the battery;

a power supply controlling means for controlling the power supplied to the battery monitoring means;

a first starting means for producing a start-up demand in response to any condition which causes increasing or decreasing of the residual charge in the battery; and

wherein the power supply controlling means is responsive to the start-up demand for starting the power supplied to the battery monitoring means.

3. A power supply control device according to claim 2, wherein the condition which causes increasing or decreasing of the residual charge is switching on of an ignition switch, and the power supply controlling means continues the power supplied to the battery monitoring means until the ignition switch is opened.

4. A power supply control device according to claim 2, wherein the condition which causes increasing or decreasing the residual charge is charging to the battery, and the power supply controlling means continues the power supplied to the battery monitoring means until the charging of the battery is ceased.

5. A power supply control device according to claim 2, wherein the condition which causes increasing or decreasing the residual charge is the switching on of any peripheral electric component, and the power supply controlling means continues the power supplied to the battery monitoring means until a first predetermined period of time has elapsed after the peripheral electric component is turned off.

6. A power supply control device according to claim 2, further comprising:

a time counting means for counting the time during which the electric vehicle is parked; and

a second starting means for activating the power supply controlling means whenever the time counting means counts up a second predetermined period of time.

7. A power supply control device according to claim 2, further comprising:

a second battery for supplying power to the battery monitoring means, wherein the second battery is charged by the battery for supplying power to each component of the electric vehicle.