System and method for dual energy storage management
AssigneeAFS Trinity Power Corporation
InventorsPhilip Kenneth Snyder, Donald Bender
Life of this patent
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Abstract
A dual-energy storage system is described, having two energy sources: (a) a fast-energy storage device (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.
Claims29
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;
- controlling discharge of the transient current from the fast energy storage to the load, and
- analyzing the load current and determining if the load is stopped or operating in a steady state,
- if the load is stopped, controlling the recharge current to charge the fast energy storage to the maximum charge, and
- if the load is operating in a steady state:
- determining an estimated recharge current to be supplied to the fast energy storage by the battery, based on the steady state;
- and
- controlling the recharge current to charge the fast energy storage to below the maximum charge.
A non-transitory 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:
- 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;
- control discharge of the transient current from the fast energy storage to the load, and
- analyzing the load current and determining if the load is stopped or operating in a steady state,
- if the load is stopped, controlling the recharge current to charge the fast energy storage to the maximum charge, and
- if the load is operating in a steady state:
- determining an estimated recharge current to be supplied to the fast energy storage by the battery, based on the steady state;
- and
- controlling the recharge current to charge the fast energy storage to below the maximum charge.
A method of adaptively controlling a load driven by a system that includes a battery and a fast energy storage, the method comprising:
- 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;
- bounding the estimated battery current to a lower second threshold value, and
- analyzing the load current and determining if the load is stopped or operating in a steady state,
- if the load is stopped, controlling the recharge current to charge the fast energy storage to the maximum charge, and
- if the load is operating in a steady state:
- determining an estimated recharge current to be supplied to the fast energy storage by the battery, based on the steady state;
- and
- controlling the recharge current to charge the fast energy storage to below the maximum charge.
A non-transitory 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:
- 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;
- bound the estimated battery current to a lower second threshold value, and
- analyzing the load current and determining if the load is stopped or operating in a steady state,
- if the load is stopped, controlling the recharge current to charge the fast energy storage to the maximum charge, and
- if the load is operating in a steady state:
- determining an estimated recharge current to be supplied to the fast energy storage by the battery, based on the steady state;
- and
- controlling the recharge current to charge the fast energy storage to below the maximum charge.
Dependencies are inferred from the claim text.