ELECTRIC VEHICLE CONTROL DEVICE
First Claim
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 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; and
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,wherein control power for the down-regulator is generated by the BMU power supply device.
1 Assignment
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Accused Products
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).
25 Citations
11 Claims
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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 unit for monitoring a state of the battery, and a main CPU for controlling the motor drive circuit, the electric vehicle control device comprising:
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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; and 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, wherein control power for the down-regulator is generated by the BMU power supply device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification