Apparatus and Method for Accurate Energy Device State-of-Charge (SoC) Monitoring and Control using Real-Time State-of-Health (SoH) Data
First Claim
1. A method for empirically determining the state-of-charge of an electrochemical energy device, comprising:
- applying electrical excitations to the energy device at a predetermined electrical excitation frequency ω
e;
applying mechanical excitations to the energy device at a predetermined mechanical excitation frequency ω
m;
measuring an electrically-induced phase difference Δ
θ
e(ω
e) between voltage (V) and current (I) within the energy device from applying said electrical excitations;
measuring a mechanically-induced phase difference Δ
θ
e(ω
m) between voltage (V) and current (I) within the energy device from applying said mechanical excitations; and
deducing the empirical real-time state-of-health of said energy device by comparing said electrically-induced phase difference Δ
θ
e(ω
e) with said mechanically-induced phase difference Δ
θ
e(ω
m); and
using said deduced state of health to determine the state of charge.
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Abstract
A device and associated testing method for empirically determining the state-of-charge of an electrochemical energy device, comprising: applying electrical excitations to the energy device at a predetermined electrical excitation frequency ωe; applying mechanical excitations to the energy device at a predetermined mechanical excitation frequency ωm; measuring an electrically-induced phase difference Δθe(ωe) between voltage (V) and current (I) within the energy device from applying the electrical excitations; measuring a mechanically-induced phase difference Δθe(ωm) between voltage (V) and current (I) within the energy device from applying the mechanical excitations; and deducing the empirical real-time state-of-health of the energy device by comparing the electrically-induced phase difference Δθe(ωe) with the mechanically-induced phase difference Δθe(ωm); and using the deduced state of health to determine the state of charge.
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Citations
20 Claims
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1. A method for empirically determining the state-of-charge of an electrochemical energy device, comprising:
-
applying electrical excitations to the energy device at a predetermined electrical excitation frequency ω
e;applying mechanical excitations to the energy device at a predetermined mechanical excitation frequency ω
m;measuring an electrically-induced phase difference Δ
θ
e(ω
e) between voltage (V) and current (I) within the energy device from applying said electrical excitations;measuring a mechanically-induced phase difference Δ
θ
e(ω
m) between voltage (V) and current (I) within the energy device from applying said mechanical excitations; anddeducing the empirical real-time state-of-health of said energy device by comparing said electrically-induced phase difference Δ
θ
e(ω
e) with said mechanically-induced phase difference Δ
θ
e(ω
m); andusing said deduced state of health to determine the state of charge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for empirically determining the state-of-charge of an electrochemical energy device, comprising:
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an electrical excitation source for applying electrical excitations to the energy device at a predetermined electrical excitation frequency ω
e;a mechanical excitation source for applying mechanical excitations to the energy device at a predetermined mechanical excitation frequency ω
m;a measurement device for measuring an electrically-induced phase difference Δ
θ
e(ω
e) between voltage (V) and current (I) within the energy device from applying said electrical excitations; andsaid measurement device for further measuring a mechanically-induced phase difference Δ
θ
e(ω
m) between voltage (V) and current (I) within the energy device from applying said mechanical excitations;
whereinthe empirical real-time state-of-health of said energy device is deduced by comparing said electrically-induced phase difference Δ
θ
e(ω
e) with said mechanically-induced phase difference Δ
θ
e(ω
m); andsaid deduced state of health is used to determine the state of charge. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification