Battery charge optimizing system
First Claim
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1. In a power supply system having a DC bus and a battery connected to the bus, an optimizer connected between the bus and the battery, said optimizer comprising:
- a first circuit connected in series between the bus and the battery and actuatable between an open circuit condition and a closed circuit condition, the first circuit in the closed circuit condition interconnecting the bus and the battery bi-directionally for supplying charging current to the battery from the bus or power from the battery to the bus depending on the relative voltages of the bus and the battery;
a second circuit connected in series between the bus and the battery, in parallel with the first circuit, and actuatable between an open circuit condition and a closed circuit condition, the second circuit in the closed circuit condition providing a voltage higher than the voltage of the bus to the battery; and
a controller sensing the voltage of the battery and sensing current flowing to the battery and actuating the first and second circuits as a function of the sensed voltage and current.
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Abstract
An optimizer circuit is interposed between a DC bus and a battery of a power supply system, including two converters in parallel, one that can lower the battery voltage below the bus voltage or directly connect the bus to the battery and one that can raise the voltage to the battery above the bus voltage. A controller actuates the two converters for optimizing battery charging and maintenance and for providing the battery power to the bus if other sources supplying the bus are not available.
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Citations
4 Claims
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1. In a power supply system having a DC bus and a battery connected to the bus, an optimizer connected between the bus and the battery, said optimizer comprising:
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a first circuit connected in series between the bus and the battery and actuatable between an open circuit condition and a closed circuit condition, the first circuit in the closed circuit condition interconnecting the bus and the battery bi-directionally for supplying charging current to the battery from the bus or power from the battery to the bus depending on the relative voltages of the bus and the battery;
a second circuit connected in series between the bus and the battery, in parallel with the first circuit, and actuatable between an open circuit condition and a closed circuit condition, the second circuit in the closed circuit condition providing a voltage higher than the voltage of the bus to the battery; and
a controller sensing the voltage of the battery and sensing current flowing to the battery and actuating the first and second circuits as a function of the sensed voltage and current. - View Dependent Claims (2, 3, 4)
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Specification