System and Method for Dual Energy Storage Management
First Claim
1. A method of controlling power distribution, comprising:
- determining a load current drawn by a load;
estimating an estimated. battery current to be supplied from a battery to the load, based on the load current;
determining a transient current required from a fast energy storage to the load based on the estimated battery current and the load current; and
controlling discharge of the transient current from the fast energy storage to the load.
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Accused Products
Abstract
A dual-energy storage system is described, having two energy sources: (a) a fast-energy storage devices (FES) such as an ultracapacitor, and (b) a long duration or steady power device, such as a fuel-cell or battery. A power converter or controller executes an energy management algorithm to determine when to provide bursts of additional power/current from the fast-energy storage device, and when to recharge the fast-energy storage device.
A method is further described of adaptively managing the state of charge of an ultracapacitor or other Fast Energy Storage device in the dual energy storage system of a Plug-in Hybrid propulsion system. The method provides good protection of the battery, good performance, and minimizes the required capacity of the ultracapacitor.
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Citations
31 Claims
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1. A method of controlling power distribution, comprising:
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determining a load current drawn by a load; estimating an estimated. battery current to be supplied from a battery to the load, based on the load current; determining a transient current required from a fast energy storage to the load based on the estimated battery current and the load current; and controlling discharge of the transient current from the fast energy storage to the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A computer readable storage medium storing one or more programs configured for execution by one or more processors, the one or more programs comprising instructions to:
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determine a load current drawn by a load; estimate an estimated battery current to be supplied from a battery to the load, based on the load current; determine a transient current required from a fast energy storage to the load based on the estimated battery current and the load current; and control discharge of the transient current from the fast energy storage to the load.
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27. A method of adaptively controlling a load driven by a system that includes a battery and a fast energy storage, the method comprising:
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determining a load current drawn by the load; determining an estimated battery current by filtering the load current; bounding the estimated battery current to an upper first threshold value; and bounding the estimated battery current to a lower second threshold value. - View Dependent Claims (28, 29, 30)
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31. A computer readable storage medium storing one or more programs configured for execution by one or more processors, the one or more programs comprising instructions to adaptively control power distribution in a system that includes a battery and a fast energy storage, comprising instructions to:
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determine a load current drawn by the load; determine an estimated battery current by filtering the load current; bound the estimated battery current to an upper first threshold value; and bound the estimated battery current to a lower second threshold value.
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Specification