Battery system for vehicle
First Claim
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1. A battery system for a vehicle comprising:
- a battery set including a plurality of battery cells;
a charge/discharge unit, connected to the battery set through electric wires, for performing a ripple charge/discharge operation to alternately charge and discharge the battery set a plurality of times per unit time, thereby to boost a DC voltage of the battery set;
an inverter unit, connected to the charge/discharge unit through electric wires, for converting the boosted DC voltage outputted from the charge/discharge unit to an AC voltage thereby to supply a drive voltage to a drive motor, which drives drive wheels of the vehicle;
a converter heat exchanger for exchanging heat generated by the charge/discharge unit with heat transfer medium;
a transfer unit for transferring the heat transfer medium toward the battery set; and
a control unit for controlling the charge/discharge unit, the inverter unit and the transfer unit in accordance with conditions of the battery set,wherein the charge/discharge unit is located closer to the battery set than the inverter unit is, andwherein, when the control unit determines that the battery set is incapable of supplying a predetermined electric power due to a low temperature condition of the battery set, the control unit controls the charge/discharge unit to perform the ripple charge/discharge operation and controls the transfer unit to transfer the heat transfer medium from the converter heat exchanger to the battery set after receiving the heat generated by the charge/discharge unit.
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Abstract
A battery system for a vehicle warms up a battery, which is mounted to charge and discharge. A charge/discharge unit is located closer to a battery set than an inverter unit is. When the battery set cannot produce a required output power because of its low temperature, a control unit controls the charge/discharge unit to charge and discharge and also controls a blower to deliver heat transfer medium, which receives heat generated from the charge/discharge unit, to the battery set, so that the battery set is warmed up to produce the required output power at earlier time.
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Citations
9 Claims
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1. A battery system for a vehicle comprising:
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a battery set including a plurality of battery cells; a charge/discharge unit, connected to the battery set through electric wires, for performing a ripple charge/discharge operation to alternately charge and discharge the battery set a plurality of times per unit time, thereby to boost a DC voltage of the battery set; an inverter unit, connected to the charge/discharge unit through electric wires, for converting the boosted DC voltage outputted from the charge/discharge unit to an AC voltage thereby to supply a drive voltage to a drive motor, which drives drive wheels of the vehicle; a converter heat exchanger for exchanging heat generated by the charge/discharge unit with heat transfer medium; a transfer unit for transferring the heat transfer medium toward the battery set; and a control unit for controlling the charge/discharge unit, the inverter unit and the transfer unit in accordance with conditions of the battery set, wherein the charge/discharge unit is located closer to the battery set than the inverter unit is, and wherein, when the control unit determines that the battery set is incapable of supplying a predetermined electric power due to a low temperature condition of the battery set, the control unit controls the charge/discharge unit to perform the ripple charge/discharge operation and controls the transfer unit to transfer the heat transfer medium from the converter heat exchanger to the battery set after receiving the heat generated by the charge/discharge unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification