Hybrid battery
First Claim
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1. A hybrid battery, comprising:
- a power source;
an ultracapacitor at least indirectly coupled to a starter, said ultracapacitor configured to be discharged to said starter;
a voltage converter operable to receive a control signal and to regulate a current level that is allowed to be drawn from the power source to charge the ultracapacitor in accordance with the control signal; and
a controller operable to generate and provide the control signal to the voltage converter, wherein the controller is operable to generate the control signal based at least in part on a measure of the voltage level of the ultracapacitor and a measure current being drawn to charge the ultracapacitor.
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Abstract
A hybrid battery includes a converter, a controller, a power source, and an ultracapacitor configured to be discharged. The converter is operable to receive a control signal and to regulate a current level that is allowed to be drawn from the power source to charge the ultracapacitor in accordance with the control signal. The controller is operable to generate and provide the control signal to the converter. The controller is operable to generate the control signal based at least in part on a measure of the voltage level of the ultracapacitor and a measure current being drawn to charge the ultracapacitor.
49 Citations
20 Claims
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1. A hybrid battery, comprising:
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a power source; an ultracapacitor at least indirectly coupled to a starter, said ultracapacitor configured to be discharged to said starter; a voltage converter operable to receive a control signal and to regulate a current level that is allowed to be drawn from the power source to charge the ultracapacitor in accordance with the control signal; and a controller operable to generate and provide the control signal to the voltage converter, wherein the controller is operable to generate the control signal based at least in part on a measure of the voltage level of the ultracapacitor and a measure current being drawn to charge the ultracapacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 16, 17, 18, 19)
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8. A vehicle starting system, comprising:
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an ultracapacitor at least indirectly coupled to a starter and configured to discharge to the starter; a power source for supplying a charging current to the ultracapacitor; a voltage converter operable to receive a control signal and to regulate the charging current in accordance with the control signal; and a controller operable to generate and provide the control signal to the voltage converter, wherein the controller is operable to generate the control signal based at least in part on a measure of the voltage level of the ultracapacitor and a measure of the charging current. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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20. A hybrid battery for a vehicle having an engine, a starter and a key ignition switch, said hybrid battery comprising:
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a power source, wherein the power source is a battery; an ultracapacitor at least indirectly coupled to said starter, said ultracapacitor configured to be discharged to the starter upon activation of an ignition switch, starting said vehicle'"'"'s engine; a voltage converter operable to receive a control signal and to regulate a current level that is allowed to be drawn from the power source to charge the ultracapacitor in accordance with the control signal, wherein the converter is a DC-DC buck converter; and a controller operable to generate and provide the control signal to the voltage converter, wherein the controller is operable to generate the control signal based at least in part on a measure of the voltage level of the ultracapacitor and a measure current being drawn to charge the ultracapacitor, wherein the controller is operable to selectively generate the control signal based upon detecting a low threshold voltage for the ultracapacitor and to selectively stop generating the control signal upon detecting a high threshold voltage level for the ultracapacitor, wherein the low threshold voltage is different than the high threshold voltage, wherein the control signal is a pulse width modulated control signal; wherein the controller is operable to perform closed loop proportional-integral current control creating a pulse width modulated control signal to the converter, and wherein the converter is operable to regulate the level of current that is allowed to be drawn from the power source to charge the ultracapacitor based at least in part on characteristics of the pulse width modulated control signal; and wherein the controller is operable to generate the pulse width modulated control signal to have characteristics determined at least in part according to a measure of the voltage level of the ultracapacitor and a measure of the current being drawn to charge the ultracapacitor.
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Specification