Bi-directional battery voltage converter
First Claim
Patent Images
1. An electrical system for a vehicle, comprising:
- a system bus;
an alternator supplying a current to the system bus when mechanically driven by a prime mover;
an ignition switch selecting an operational state of the electrical system;
a primary battery connected to the system bus;
a first auxiliary battery module connected to the system buscomprising a first auxiliary battery,a second auxiliary battery,a bi-directional battery voltage converter,a module controller selectively connecting one of the first auxiliary battery, and the second auxiliary battery to the bi-directional battery voltage converter; and
a main system controller operating the first auxiliary battery module in one ofa null mode, wherein the first auxiliary battery and the second auxiliary battery are disconnected from the electrical system,a charging mode, wherein one of the first auxiliary battery and the second auxiliary battery receives a current via the bi-directional battery voltage converter, anda discharging mode, wherein one first auxiliary battery and the second auxiliary battery supplies a current via the bidirectional battery voltage converter to the system bus,wherein the main system controller is configured to operate the first auxiliary battery module in the charging mode when the ignition switch is in a closed state, and configured to operate the first auxiliary battery module in the discharging mode when the ignition switch is in an open state.
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Abstract
A battery module for use with a vehicle electrical system. The battery module includes a bi-directional battery voltage converter, a first battery, and a second battery. A first relay selectively connects the first battery to the bi-directional battery voltage converter. A second relay selectively connecting the second battery to the bi-directional battery voltage converter. A controller selectively energizes the first relay, selectively energizes the second relay, and controls a direction of current through the bi-directional battery voltage converter.
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Citations
21 Claims
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1. An electrical system for a vehicle, comprising:
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a system bus; an alternator supplying a current to the system bus when mechanically driven by a prime mover; an ignition switch selecting an operational state of the electrical system; a primary battery connected to the system bus; a first auxiliary battery module connected to the system bus comprising a first auxiliary battery, a second auxiliary battery, a bi-directional battery voltage converter, a module controller selectively connecting one of the first auxiliary battery, and the second auxiliary battery to the bi-directional battery voltage converter; and a main system controller operating the first auxiliary battery module in one of a null mode, wherein the first auxiliary battery and the second auxiliary battery are disconnected from the electrical system, a charging mode, wherein one of the first auxiliary battery and the second auxiliary battery receives a current via the bi-directional battery voltage converter, and a discharging mode, wherein one first auxiliary battery and the second auxiliary battery supplies a current via the bidirectional battery voltage converter to the system bus, wherein the main system controller is configured to operate the first auxiliary battery module in the charging mode when the ignition switch is in a closed state, and configured to operate the first auxiliary battery module in the discharging mode when the ignition switch is in an open state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A battery module for use with a vehicle electrical system, comprising:
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a bi-directional battery voltage converter; a first battery; a second battery; a first relay selectively connecting the first battery to the bi-directional battery voltage converter; a second relay selectively connecting the second battery to e bi-directional battery voltage converter; and a controller selectively energizing the first relay, selectively energizing the second relay, and controlling a direction of current through the bi-directional battery voltage converter, wherein, based on a state of an ignition switch of the vehicle electrical sys e the battery module is configured to operate in at least one of; a null mode, wherein the first battery and the second battery are disconnected from an electrical system, a charging mode, wherein one of the first battery and the second battery receives a current via the bi-directional battery voltage converter, and a discharging mode, wherein one the first battery and the second battery supplies a current via the bidirectional battery voltage converter to the vehicle electrical system, wherein the controller is configured to operate the first battery in the charging mode when the ignition switch is in a closed state, and configured to operate the first battery in the discharging mode when the ignition switch is in an open state. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An electrical system for a vehicle, comprising:
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a system bus; an ignition switch selecting an operational state of the electrical system; a primary battery connected to the system bus; a first auxiliary, battery module comprising a first auxiliary battery, a second auxiliary battery, a first bi-directional battery voltage converter, a first module controller selectively connecting one of the first auxiliary battery and the second auxiliary battery to the first hi-directional battery voltage converter; a second auxiliary battery module comprising a third auxiliary battery, a fourth auxiliary battery, a second bi-directional battery voltage converter, a second module controller selectively connecting one of the third auxiliary battery and the fourth auxiliary battery to the second hi-directional battery voltage converter; a main system controller operating the first auxiliary battery module and the second auxiliary battery module to prioritize a recharging of one of the first, second, third, and fourth auxiliary batteries; wherein the main system controller is configured to operate the first auxiliary battery module in a charging mode when the ignition switch is in a closed state, and configured to operate the first auxiliary battery module in a discharging mode when the ignition switch is in an open state; and wherein in the discharging mode, wherein one the first auxiliary battery and the second auxiliary battery supplies a current via the first bi-directional battery voltage converter to the system bus. - View Dependent Claims (21)
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Specification