US 12,352,715 B2
Methods and systems for in-situ impedance spectroscopy analysis of battery cells in multi-cell battery packs
Rainer Johannes Fasching, Mill Valley, CA (US); Georgy Zerkalov, Santa Clara, CA (US); Arnaud Devie, Hawthorne, CA (US); Seth Marshall Kahn, San Francisco, CA (US); Anthony John Stratakos, San Anselmo, CA (US); Corrado Cammi, Sunnyvale, CA (US); Anderson Rennie John, Santa Clara, CA (US); and Yoosok Saw, Seoul (KR)
Assigned to Element Energy Inc., Menlo Park, CA (US)
Filed by Element Energy, Inc., Menlo Park, CA (US)
Filed on May 12, 2023, as Appl. No. 18/316,949.
Application 18/316,949 is a continuation of application No. 17/401,784, filed on Aug. 13, 2021, granted, now 11,692,956.
Application 17/401,784 is a continuation of application No. 16/996,422, filed on Aug. 18, 2020, granted, now 11,125,707, issued on Sep. 21, 2021.
Prior Publication US 2023/0280295 A1, Sep. 7, 2023
Int. Cl. G01N 27/02 (2006.01); G01R 31/382 (2019.01); G01R 31/392 (2019.01)
CPC G01N 27/026 (2013.01) [G01R 31/382 (2019.01); G01R 31/392 (2019.01)] 18 Claims
OG exemplary drawing
 
1. A method for on-demand in-situ analysis of multiple battery nodes comprising a first battery node and one or more additional battery nodes, the method comprising:
applying a test profile to the first battery node and simultaneously applying a compensation profile to the one or more additional battery nodes, wherein:
applying the test profile to the first battery node comprises changing an electrical current through the first battery node,
applying the compensation profile to the one or more additional battery nodes comprises changing an electrical current through the one or more additional battery nodes,
the test profile is designed to detect one or more characteristics of the first battery node while the test profile is applied to the first battery node,
the compensation profile compensates for power output changes associated with applying the test profile to the first battery node,
the first battery node comprises a first plurality of battery cells, a first node controller used for applying the test profile to the first battery node, and a first power converter configured to monitor the one or more characteristics of the first battery node while applying the test profile to the first battery node,
the first battery node is selected from the multiple battery nodes for purposes of the on-demand in-situ analysis,
the first node controller is communicatively connected with one or more additional node controllers of the one or more additional battery nodes and configured to determine the test profile for the first battery node and the compensation profile for the one or more additional battery nodes,
the one or more additional node controllers control operation of the one or more additional battery nodes, and
the one or more additional battery nodes continue to charge or discharge while applying the test profile to the first battery node; and
determining the one or more characteristics of the first battery node based on a response of the first battery node to the test profile applied to the first battery node.