Patent · US Active

Automatic method for estimating the state of charge of a battery cell

US10267861B2 · kind B2 · utility

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5References
8Claims
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Key dates

Filing dateNov 26, 2015
Grant dateApr 23, 2019
Priority date—
Expiry dateDec 21, 2035

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R31/367
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

An automatic estimation procedure for estimating a battery's state-of-charge includes predicting the state-of-charge using a state model that includes a state-transition matrix. An observation model then uses an observability matrix in connection with predicting a measured value of a parameter. State noise, the covariance of which is characterized by a state-noise covariance matrix contaminates this prediction. Similarly, measurement noise, the covariance of which is characterized by a measurement covariance matrix, contaminates this prediction. The values of these covariance matrices are then adjusted during the estimation procedure.

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