SYSTEM FOR MULTIPLE ENERGY STORAGE AND MANAGEMENT AND METHOD OF MAKING SAME
First Claim
1. A propulsion system comprising:
- an electric drive;
a direct current (DC) link electrically coupled to the electric drive;
a first energy storage system electrically coupled to the electric drive, the first energy storage system comprising a low specific-power energy storage device;
a coupling device coupled to a first terminal of the low specific-power energy storage device;
a second energy storage system, wherein a first terminal of the second energy storage system is electrically coupled to the electric drive through the DC link and a second terminal of the second energy storage system is coupled to the coupling device; and
a boost converter assembly coupled to the first energy storage system and to the second energy storage system;
wherein the coupling device is configured to couple the second terminal of the second energy storage system to the first terminal of the low specific-power energy storage device in a series connection; and
wherein the series connection bypasses the boost converter assembly.
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Accused Products
Abstract
A system for multiple energy storage and management includes a propulsion system includes an electric drive and a direct current (DC) link electrically and a first energy storage system coupled to the electric drive. The first energy storage system includes a low specific-power energy storage device (ESD). A coupling device is coupled to a first terminal of the low specific-power ESD and a second energy storage system, wherein a first terminal of the second energy storage system is electrically coupled to the electric drive through the DC link and a second terminal of the second energy storage system is coupled to the coupling device. A boost converter assembly is coupled to the first and second energy storage systems. The coupling device couples the second terminal of the second energy storage system to the first terminal of the low specific-power ESD in a series connection that bypasses the boost converter assembly.
21 Citations
24 Claims
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1. A propulsion system comprising:
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an electric drive; a direct current (DC) link electrically coupled to the electric drive; a first energy storage system electrically coupled to the electric drive, the first energy storage system comprising a low specific-power energy storage device; a coupling device coupled to a first terminal of the low specific-power energy storage device; a second energy storage system, wherein a first terminal of the second energy storage system is electrically coupled to the electric drive through the DC link and a second terminal of the second energy storage system is coupled to the coupling device; and a boost converter assembly coupled to the first energy storage system and to the second energy storage system; wherein the coupling device is configured to couple the second terminal of the second energy storage system to the first terminal of the low specific-power energy storage device in a series connection; and wherein the series connection bypasses the boost converter assembly. - 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 low specific-power energy battery to a coupling device; coupling a second energy storage system to an electric drive through a direct current (DC) link; coupling a boost converter to the coupling device, to the second energy storage system, and to the DC link; and connecting a terminal of the low specific-power energy battery in series with a terminal of the second energy storage system via the coupling device such that the connection between the terminal of the low specific-power energy battery and the terminal of the second energy storage system bypasses the boost converter when the coupling device is in a coupling state configured to couple the low specific-power energy battery to the second energy storage system. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An energy storage arrangement for an electrically powered system, the arrangement comprising:
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a first energy storage system comprising at least a low specific-power energy storage device; a boost converter coupled to the first energy storage system via a coupling device on a low-voltage side of the boost converter; and a second energy storage system coupled to the boost converter on a high-voltage side the boost converter, wherein the second energy storage system is further coupled in a series connection with the low specific-power energy storage device via a coupling device such that the series connection between the second energy storage system and the low specific-power energy storage device bypasses the boost converter. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification