Patent · US Active

SOC determination by evaluation of effects invoked by dimensional changes of battery cells

US9476946B2 · kind B2 · utility

9Cited by

0References

10Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Harald Schlag · Gerolzhofen, DE
Christoph Klunker · Frankfurt, DE
Matthias Hampel · Rüsselsheim am Main, DE

Key dates

Filing date	May 8, 2013
Grant date	Oct 25, 2016
Priority date	—
Expiry date	Feb 8, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/70
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A system and method for monitoring a state-of-charge (SOC) of a battery, where the system includes a sensor and a controller. The sensor provides a measurement signal that can track changes of a nominal volume of the battery by either measuring a size or pressure of the battery, where the nominal volume is the volume that the electrolyte, anode, cathode and current collectors would occupy if unconstrained. The controller is programmed to use a function to estimate the SOC from the measurement signal. The function can be established after constructing and finding a repeatable charging and discharging curve of the battery that graphs the measurement signal compared to the SOC of the battery.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.