Converging algorithm for real-time battery prediction
First Claim
1. A method for use with a battery, the method comprising the steps of:
- in a battery simulator, defining at least one first node representing a measurable physical value of the battery;
in the battery simulator, defining at least one second node representing a quality of the battery that is desired to be predicted;
in the battery simulator, defining at least one third node;
in the battery simulator, defining at least first and second branch elements, the first branch element connected in the battery simulator to the at least one first node, the first branch element connected in the battery simulator to the at least one second node, the first branch element connected in the battery simulator to the at least one third node, the second branch element connected in the battery simulator to the at least one first node, the second branch element connected in the battery simulator to the at least one second node, the second branch element connected in the battery simulator to the at least one third node;
at least one of the first and second branch elements having at least one output thereof responding non-linearly to at least one input thereof, the output and the input each connected in the battery simulator to a respective node;
the method further comprising communicating information indicative of the quality of the battery that is desired to be predicted to a destination external to the battery.
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Abstract
A method predicts the battery state in “real-time”, which is based on a nodal algorithmic model. Under this method, the battery is modeled as a network mesh of both linear and non-linear electrical branch elements. Those branch elements are inter-connected through a set of nodes. Each node can have several branches either originating or ending into it. The branch elements may represent loosely some particular function or region of the battery or they may serve a pure algorithmic function. The non-linear behavior of the elements may be described either algorithmically or through lookup tables. Kirchhoff'"'"'s laws are applied on each node to describe the relationships between currents and voltages. The system may be connected with a battery so that it can receive measured values at the battery, and the system yields state-of-charge, state-of-health, and state-of- function signals.
5 Citations
11 Claims
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1. A method for use with a battery, the method comprising the steps of:
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in a battery simulator, defining at least one first node representing a measurable physical value of the battery; in the battery simulator, defining at least one second node representing a quality of the battery that is desired to be predicted; in the battery simulator, defining at least one third node; in the battery simulator, defining at least first and second branch elements, the first branch element connected in the battery simulator to the at least one first node, the first branch element connected in the battery simulator to the at least one second node, the first branch element connected in the battery simulator to the at least one third node, the second branch element connected in the battery simulator to the at least one first node, the second branch element connected in the battery simulator to the at least one second node, the second branch element connected in the battery simulator to the at least one third node; at least one of the first and second branch elements having at least one output thereof responding non-linearly to at least one input thereof, the output and the input each connected in the battery simulator to a respective node; the method further comprising communicating information indicative of the quality of the battery that is desired to be predicted to a destination external to the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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a battery; a temperature sensor at said battery yielding a temperature signal; a current sensor at said battery yielding a current signal; a battery manager receiving the temperature signal and the current signal and measuring a voltage across the battery, the battery manager comprising a battery simulator; the battery simulator defining at least one first node representing a measurable physical value of the battery; the battery simulator defining at least one second node representing a quality of the battery that is desired to be predicted; the battery simulator defining at least one third node; the battery simulator further defining at least first and second branch elements, the first branch element connected in the battery simulator to the at least one first node, the first branch element connected in the battery simulator to the at least one second node, the first branch element connected in the battery simulator to the at least one third node, the second branch element connected in the battery simulator to the at least one first node, the second branch element connected in the battery simulator to the at least one second node, the second branch element connected in the battery simulator to the at least one third node, at least one of the first and second branch elements having at least one output thereof responding non-linearly to at least one input thereof, the output and the input each connected in the battery simulator to a respective node; the battery manager having a communications channel communicating information indicative of the quality of the battery that is desired to be predicted to a destination external to the battery manager. - View Dependent Claims (9, 10, 11)
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Specification