SYSTEM FOR MULTIPLE ENERGY STORAGE AND MANAGEMENT AND METHOD OF MAKING SAME
First Claim
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, the first energy storage system comprising a high specific-energy storage device;
a second energy storage system electrically coupled to the first energy storage system in a series connection, the second energy storage system comprising a high specific-power storage device; and
a first bi-directional boost converter electrically coupled to the first and second energy storage systems such that a terminal of the first energy storage system is electrically coupled to a low voltage side of the first bi-directional boost converter and a first terminal of the second energy storage system is coupled to a high voltage side of the first bi-directional boost converter; and
wherein the series connection bypasses the first bi-directional boost converter.
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Abstract
A propulsion system includes an electric drive, a first energy storage system electrically coupled to the electric drive through a DC link, and a second energy storage system electrically coupled to the first energy storage system in a series connection. The first energy storage system comprises a high specific-energy storage device; the second energy storage system comprises a high specific-power storage device. The propulsion system also includes a bi-directional boost converter electrically coupled to the first and second energy storage systems such that a terminal of the first energy storage system is electrically coupled to a low voltage side of the bi-directional boost converter and a first terminal of the second energy storage system is coupled to a high voltage side of the bi-directional boost converter. The series connection bypasses the bi-directional boost converter.
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Citations
20 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, the first energy storage system comprising a high specific-energy storage device; a second energy storage system electrically coupled to the first energy storage system in a series connection, the second energy storage system comprising a high specific-power storage device; and a first bi-directional boost converter electrically coupled to the first and second energy storage systems such that a terminal of the first energy storage system is electrically coupled to a low voltage side of the first bi-directional boost converter and a first terminal of the second energy storage system is coupled to a high voltage side of the first bi-directional boost converter; and wherein the series connection bypasses the first bi-directional boost converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of assembling a control system for an electric drive comprising:
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providing a first bi-directional boost converter; coupling a first terminal of a high specific-energy storage device to a low-voltage side of the first bi-directional boost converter; coupling a first terminal of a high specific-power storage device to a high-voltage side of the first bi-directional boost converter; and coupling the high specific-energy storage device in series with the high specific-power storage device such that the first terminal of the high specific-energy storage device is electrically coupled to a second terminal of the high specific-power storage device. - View Dependent Claims (10, 11)
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12. An energy storage arrangement for an electrically powered system, the arrangement comprising:
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a first bi-directional boost converter; a first energy storage system electrically coupled to a first side of the first bi-directional boost converter, the first energy storage system comprising a high specific-energy storage device; a second energy storage system electrically coupled to a second side of the first bi-directional boost converter, the second energy storage system comprising a high specific-power storage device; an electrical link forming a series connection between a positive terminal of the first energy storage system and a negative terminal of the second energy storage system, wherein the electrical link bypasses the first bi-directional boost converter. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification