Apparatus for controlling state of charge/discharge of hybrid car and method for controlling state of charge/discharge of hybrid car
First Claim
1. An apparatus for controlling a charge/discharge state of a hybrid car having generators for charging a battery by operating an engine and motors for discharging the battery by driving the hybrid car, the apparatus comprising:
- a temperature sensor that detects a temperature of the battery; and
a charge/discharge controller that forcibly charges/discharges the battery within a predetermined charging range of the battery when the temperature of the battery is at a temperature not exceeding a predetermined temperature to control the temperature of the battery to be in a predetermined temperature range by using heat generated by the charge/discharge.
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Accused Products
Abstract
The temperature of a battery in a hybrid car is supervised by temperature sensors. When the temperature of the battery is at a temperature not exceeding a predetermined temperature, a battery ECU issues a command to a control CPU to perform forcible charge/discharge of the battery to raise the temperature of the battery. When raising of the temperature is performed by charging, a requested output from an engine is increased as compared with a usual state. In such a state, motor-generators are operated as generators so as to generate electric power and charge the battery by passing an electric current to the battery rather than generating a driving force. When raising of the temperature is performed by discharging, the requested output from the engine is reduced as compared with the usual state. In this case, the motor-generators are operated as drive motors to consume electric power so as to draw electric current from the battery causing discharge of the battery. The electric current allowed to flow at this time causes internal resistance to be generated in the battery that heats the battery from an inside portion thereof. Thus, an apparatus for controlling a charge/discharge state of a hybrid car can be provided that quickly and easily controls the temperature of the battery to a predetermined temperature.
66 Citations
18 Claims
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1. An apparatus for controlling a charge/discharge state of a hybrid car having generators for charging a battery by operating an engine and motors for discharging the battery by driving the hybrid car, the apparatus comprising:
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a temperature sensor that detects a temperature of the battery; and a charge/discharge controller that forcibly charges/discharges the battery within a predetermined charging range of the battery when the temperature of the battery is at a temperature not exceeding a predetermined temperature to control the temperature of the battery to be in a predetermined temperature range by using heat generated by the charge/discharge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of controlling a charge/discharge state of a hybrid car having generators operated by an engine for charging a battery and motors for discharging the battery by driving the hybrid car, the method comprising steps of:
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detecting a temperature of a battery mounted on a hybrid car; determining whether the temperature of the battery is at a temperature not exceeding a predetermined temperature; and charging/discharging the battery forcibly within a predetermined charge range of the battery when the temperature of the battery is at a temperature not exceeding the predetermined temperature. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification