US 11,692,956 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., San Francisco, CA (US)
Filed on Aug. 13, 2021, as Appl. No. 17/401,784.
Application 17/401,784 is a continuation of application No. 16/996,422, filed on Aug. 18, 2020, granted, now 11,125,707.
Prior Publication US 2022/0057350 A1, Feb. 24, 2022
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)] 20 Claims
OG exemplary drawing
 
1. A method for on-demand in-situ analysis of multiple battery cells in a battery pack, the method comprising:
applying a test profile to a first battery cell using a first node controller while the battery pack remains operational, wherein:
the first battery cell is selected from the multiple battery cells in the battery pack for purposes of the on-demand in-situ analysis,
the first node controller is connected with one or more additional node controllers of the battery pack,
the one or more additional node controllers control the operation of one or more additional cells in the battery pack, and
the one or more additional cells continue to charge or discharge using a power compensation profile while applying the test profile to the first battery cell independent from the applying the test profile to the first battery cell, and
the power compensation profile used to charge or discharge the one or more additional cells is different from the test profile applied to the first battery cell; and
determining one or more characteristics of the first battery cell based on a response of the first battery cell to the test profile applied to the first battery cell.