Energy management system to improve efficiency of electric and hybrid drive trains
First Claim
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1. A propulsion system comprising:
- an electric drive;
a first energy storage system electrically coupled to the electric drive through a direct current (DC) link;
a second energy storage system electrically coupled to the electric drive; and
a multi-channel bi-directional boost converter coupled to the first energy storage system and to the second energy storage system such that the second energy storage system is decouplable from the DC link;
wherein the second energy storage system comprises at least one power battery coupled in series with at least one ultracapacitor, the second energy storage system further comprises at least one energy battery and a unidirectional conducting apparatus configured so the multi-channel bi-directional boost converter extracts power and energy from the at least one power battery and a lower power level from the at least one energy battery using two channels.
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Abstract
A propulsion system is provided that includes an electric drive, a first energy storage system electrically coupled to the electric drive through a direct current (DC) link, and a second energy storage system electrically coupled to the electric drive. The propulsion system further includes a multi-channel bi-directional boost converter coupled to the first energy storage system and to the second energy storage system such that the second energy storage system is decouplable from the DC link, wherein the second energy storage system comprises at least one battery coupled in series with at least one ultracapacitor.
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Citations
21 Claims
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1. A propulsion system comprising:
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an electric drive; a first energy storage system electrically coupled to the electric drive through a direct current (DC) link; a second energy storage system electrically coupled to the electric drive; and a multi-channel bi-directional boost converter coupled to the first energy storage system and to the second energy storage system such that the second energy storage system is decouplable from the DC link;
wherein the second energy storage system comprises at least one power battery coupled in series with at least one ultracapacitor, the second energy storage system further comprises at least one energy battery and a unidirectional conducting apparatus configured so the multi-channel bi-directional boost converter extracts power and energy from the at least one power battery and a lower power level from the at least one energy battery using two channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of assembling a control system comprising:
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coupling a first energy storage system to an electric drive through a direct current (DC) link; connecting an ultracapacitor in series with a power battery, and at least one energy battery and a unidirectional conducting apparatus to form a second energy storage system; and coupling a multi-channel bi-directional boost converter to each of the first energy storage system and second energy storage system such that the first energy storage system is decoupled from the second energy storage system, and wherein the multi-channel bi-directional boost converter is further coupled to the electric drive through the DC link, further wherein the multi-channel bi-directional boost converter extracts power and energy from the power battery and a lower power level from the at least one energy battery using two channels. - View Dependent Claims (13, 14, 15)
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16. An energy storage arrangement for an electrically powered system, the arrangement comprising:
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at least one ultracapacitor coupled in series with at least one power battery; at least one energy battery and a unidirectional conducting apparatus; and a multi-channel bi-directional boost converter coupled to the at least one ultracapacitor and the at least one power battery, wherein the multi-channel bi-directional boost converter is configured to dynamically control an input and an output voltage from the at least one ultracapacitor and the at least one power battery, further wherein the at least one energy battery and the unidirectional conducting apparatus configured so the multi-channel bi-directional boost converter extracts power and energy from the at least one power battery and a lower power level from the at least one energy battery using two channels. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification