Control system for air-conditioner on electric vehicle
First Claim
1. A control system for controlling an air-conditioner on an electric vehicle, comprising:
- a high-voltage battery;
a motor-driven compressor;
an air-conditioner control unit for controlling the air-conditioner;
an inverter for energizing said motor-driven compressor with electric energy supplied from said high-voltage battery in response to a drive signal from said air-conditioner control unit;
a battery management unit connected to said air-conditioner control unit and said high-voltage battery, for managing the high-voltage battery by checking power supply conditions of the high-voltage battery;
said air-conditioner control unit having means for outputting a confirmation signal to said battery management unit before said drive signal is outputted;
said battery management unit having means for checking the power supply conditions of the high-voltage battery and outputting a permission signal representative of a permission to start said motor-driven compressor to said air-conditioner control unit based on the checked power supply conditions, said air-conditioner control unit having means for activating said drive signal to operate said inverter after having received said permission signal; and
contacts controllable by said battery management unit for supplying and cutting off electric energy from said high-voltage battery, said contacts being connected between said high-voltage battery and said motor-driven compressor, said battery management unit having means for checking the power supply conditions of the high-voltage battery, closing said contacts to supply electric energy from said high-voltage battery to said inverter when the checked power supply conditions are affirmative, further checking the power supply conditions of the high-voltage battery after the contacts are closed, and outputting said permission signal to said air-conditioner control unit when the further checked power supply conditions are affirmative.
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Accused Products
Abstract
When an air-conditioner operation mode signal AM representative of a confirmation to permit the starting of a motor-driven compressor is supplied from an air-conditioner control unit to a battery management unit, the battery management unit detects power supply conditions including a voltage, a ground fault, a wire disconnection, etc. of a high-voltage battery, and supplies a start permission signal AUX2 indicative of a permission to start the motor-driven compressor to the air-conditioner control unit depending on the detected power supply conditions. After having received the start permission signal AUX2, the air-conditioner control unit turns on an air-conditioner inverter drive signal DAI to operate the motor-driven compressor.
62 Citations
20 Claims
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1. A control system for controlling an air-conditioner on an electric vehicle, comprising:
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a high-voltage battery; a motor-driven compressor; an air-conditioner control unit for controlling the air-conditioner; an inverter for energizing said motor-driven compressor with electric energy supplied from said high-voltage battery in response to a drive signal from said air-conditioner control unit; a battery management unit connected to said air-conditioner control unit and said high-voltage battery, for managing the high-voltage battery by checking power supply conditions of the high-voltage battery; said air-conditioner control unit having means for outputting a confirmation signal to said battery management unit before said drive signal is outputted; said battery management unit having means for checking the power supply conditions of the high-voltage battery and outputting a permission signal representative of a permission to start said motor-driven compressor to said air-conditioner control unit based on the checked power supply conditions, said air-conditioner control unit having means for activating said drive signal to operate said inverter after having received said permission signal; and contacts controllable by said battery management unit for supplying and cutting off electric energy from said high-voltage battery, said contacts being connected between said high-voltage battery and said motor-driven compressor, said battery management unit having means for checking the power supply conditions of the high-voltage battery, closing said contacts to supply electric energy from said high-voltage battery to said inverter when the checked power supply conditions are affirmative, further checking the power supply conditions of the high-voltage battery after the contacts are closed, and outputting said permission signal to said air-conditioner control unit when the further checked power supply conditions are affirmative. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control system for controlling an air-conditioner on an electric vehicle, comprising:
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a motor-driven air-conditioner for supplying electric energy from a high-voltage battery through an inverter to a motor-driven compressor, and introducing either warm air or cool air into a cabin of the electric vehicle through a heat exchange in a coolant circuit; an air-conditioner control unit for outputting a drive signal to said inverter; and a battery management unit connected to said air-conditioner control unit and said high-voltage battery, for managing said high-voltage battery; said air-conditioner control unit having means for operating said motor-driven air-conditioner selectively in a normal air-conditioning control mode and a pre-air-conditioning control mode, wherein said battery management unit has fault decision means for determining whether the high-voltage battery is suffering a fault, and means for causing at least one of holding inactivated or shutting off said motor-driven air-conditioner regardless of the drive signal from said air-conditioner control unit if the high-voltage battery is suffering a fault as determined by said fault decision means. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A control system for controlling an air-conditioner operating in a plurality of modes on an electric vehicle, comprising:
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a high-voltage battery; a motor-driven compressor; an air-conditioner control unit for controlling the air conditioner; an inverter for energizing said motor-driven compressor with electric energy supplied from said high-voltage battery in response to a drive signal from said air-conditioner control unit; and a battery management unit connected to said air-conditioner control unit and said high-voltage battery, for managing the high-voltage battery by checking power supply conditions of the high-voltage battery; said air-conditioner control unit having means for outputting a confirmation signal to said battery management unit before said drive signal is outputted, said confirmation signal having a predetermined duty cycle representative of a confirmation to permit starting of said inverter for operating said air-conditioner in a selected mode from among said plurality of modes; said battery management unit having means for checking the power supply conditions of the high-voltage battery and outputting a permission signal representative of a permission to start said motor-driven compressor to said air-conditioner control unit based on the checked power supply conditions corresponding to said selected mode; said air-conditioner control unit having means for activating said drive signal to operate said inverter in said selected mode after having received said permission signal. - View Dependent Claims (14)
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15. A control system for controlling an air-conditioner on an electric vehicle, comprising:
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a motor-driven air-conditioner for supplying electric energy from a high-voltage battery through an inverter to a motor-driven compressor, and introducing either warm air or cool air into a cabin of the electric vehicle through a heat exchange in a coolant circuit; an air-conditioner control unit for outputting a drive signal to said inverter; and a battery management unit connected to said air-conditioner control unit and said high-voltage battery, for managing said high-voltage battery; said air-conditioner control unit having means for operating said motor-driven air-conditioner selectively in a normal air-conditioning control mode and a pre-air-conditioning control mode, wherein said air-conditioner control unit has fault decision means for determining whether said motor-driven air-conditioner is suffering a fault, and a means for holding said motor-driven air-conditioner inactivated if the motor-driven air-conditioner is suffering a fault as determined by said fault decision means. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification