Apparatus and method for determining state of change (SOC) and state of health (SOH) of electrical cells

• Main Authors: Hsieh, Andrew, Goy, Alexandre S. R, Hertzberg, Benjamin, Steingart, Daniel Artemus, Rowley, III, Clarence Worth, Gjeltema, Peter James, Fleischer, Jason Wolf, Bhadra, Shoham
• Format: Patent
• Language: English
• Published: 20.11.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

A method, an apparatus and a system for interrogating a battery in order to determine one or more of: (i) its state of charge (SOC), (ii) its state of health (SOH), (iii) physical state of one or more internal components or parts, which utilizes at least one sound source for transmitting a signal (e.g., a sound wave or sound pulse through or across the battery, and at least one sound receiver for receiving a signal from the battery, which received signal is representative of the physical state of the battery being interrogated. The interrogation method is noninvasive, namely does not require the depletion of a portion of the charge of the battery being tested or settlement or the destruction of the battery in order to evaluate one or more of (i), (ii) and (iii).