BI-DIRECTIONAL BATTERY VOLTAGE CONVERTER
First Claim
1. A method of charging batteries in a vehicle electrical system, the vehicle electrical system comprising a system bus, a first switch selectively connecting a first battery with the system bus, a second switch selectively connecting a second battery with the system bus, and a controller monitoring a voltage of the vehicle electrical system and controllably opening and closing the first switch and the second switch, the method comprising:
- opening the first switch and the second switch, thereby disconnecting the first battery and the second battery from the system bus;
closing the first switch, thereby connecting the first battery with the system bus;
monitoring the voltage of the vehicle electrical system in response to the first switch closing;
opening the first switch if the voltage of the vehicle electrical system traverses a threshold value;
closing the second switch, thereby connecting the second battery with the system bus;
monitoring the voltage of the vehicle electrical system in response to the second switch closing; and
opening the second switch if the voltage of the vehicle electrical system traverses the threshold value.
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Accused Products
Abstract
A method of charging batteries in a vehicle electrical system having a system bus, a first switch selectively connecting a first battery with the system bus, a second switch selectively connecting a second battery with the system bus, and a controller monitoring a voltage of the vehicle electrical system and controllably opening and closing the first switch and the second switch. The method includes closing the first switch and opening the first switch if the voltage of the vehicle electrical system traverses a threshold value. The method also includes closing the second switch and opening the second switch if the voltage of the vehicle electrical system traverses the threshold value.
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Citations
19 Claims
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1. A method of charging batteries in a vehicle electrical system, the vehicle electrical system comprising a system bus, a first switch selectively connecting a first battery with the system bus, a second switch selectively connecting a second battery with the system bus, and a controller monitoring a voltage of the vehicle electrical system and controllably opening and closing the first switch and the second switch, the method comprising:
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opening the first switch and the second switch, thereby disconnecting the first battery and the second battery from the system bus; closing the first switch, thereby connecting the first battery with the system bus; monitoring the voltage of the vehicle electrical system in response to the first switch closing; opening the first switch if the voltage of the vehicle electrical system traverses a threshold value; closing the second switch, thereby connecting the second battery with the system bus; monitoring the voltage of the vehicle electrical system in response to the second switch closing; and opening the second switch if the voltage of the vehicle electrical system traverses the threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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- 10. A controller for use with a vehicle electrical system, the controller comprising a voltage input terminal, a memory, and a micro-processor, the controller controllably opening a first switch, thereby disconnecting a first battery from a system bus, controllably opening a second switch, thereby disconnecting a second battery from the system bus, controllably closing the first switch, thereby connecting the first battery with the system bus, receiving a voltage of the vehicle electrical system at the voltage input terminal in response to the first switch closing, comparing, in the micro-processor, a value related to the voltage of the vehicle electrical system to a threshold value from the memory, controllably opening the first switch in response to the voltage of the vehicle electrical system traversing the threshold value, controllably closing the second switch, thereby connecting a second battery with the system bus, receiving a voltage of the vehicle electrical system at the voltage input terminal in response to the second switch closing, comparing, in the micro-processor, a value related to the voltage of the vehicle electrical system to the threshold value, and controllably opening the second switch in response to the voltage of the vehicle electrical system traversing the threshold value.
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12. A vehicle electrical system comprising;
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a system bus; a first battery; a first switch selectively connecting the first battery to the system bus; a second battery; a second switch selectively connecting the second battery to the electrical system; and a controller controllably opening the first switch and the second switch, thereby disconnecting the first battery and the second battery from the system bus, controllably closing the first switch, thereby connecting the first battery with the system bus, monitoring a voltage of the vehicle electrical system in response to the first switch closing, controllably opening the first switch if the voltage of the vehicle electrical system traverses a threshold value, controllably closing the second switch, thereby connecting a second battery associated with the second switch with the system bus, monitoring the voltage of the vehicle electrical system in response to the second switch closing, and opening the second switch if the voltage of the vehicle electrical system traverses the threshold value. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification