Search International and National Patent Collections

1. (WO2017151955) DEVICE, SYSTEM, AND METHOD FOR MEASURING INTERNAL IMPEDANCE OF A TEST BATTERY USING FREQUENCY RESPONSE

Pub. No.:    WO/2017/151955    International Application No.:    PCT/US2017/020499
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: G01R 31/36
G01N 27/42
H01M 10/42
H01M 10/44
H01M 10/48
H02J 7/00
Applicants: BATTELLE ENERGY ALLIANCE, LLC
Inventors: CHRISTOPHERSEN, Jon P.
MORRISON, William H.
MORRISON, John L.
Title: DEVICE, SYSTEM, AND METHOD FOR MEASURING INTERNAL IMPEDANCE OF A TEST BATTERY USING FREQUENCY RESPONSE
Abstract:
Battery impedance testing devices, circuits, systems, and related methods are disclosed. An impedance measurement device includes a current driver configured to generate an excitation current signal to be applied to a test battery responsive to a control signal, and a processor operably coupled with the current driver. The processor is configured to generate the control signal during an auto ranging mode and a measuring mode. The auto ranging mode applies the excitation current signal to the test battery over a plurality of different amplitudes to measure a response to the excitation current signal at each amplitude. The measuring mode applies the excitation current signal to the test battery for an amplitude responsive to the results of the auto ranging mode. Improved sensitivity and resolution may be achieved for low impedance batteries with a rapid measurement time.