The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 2024
Filed:
May. 12, 2023
Element Energy, Inc., Menlo Park, CA (US);
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);
Yoosok Saw, Seoul, KR;
Element Energy, Inc., San Francisco, CA (US);
Abstract
Described methods and systems provide in-situ leakage current testing of battery cells in battery packs even while these packs operate. Specifically, an external electrical current is discontinued through a tested battery cell using a node controller, to which the tested battery cell is independently connected. Changes in the open circuit voltage (OCV) are then detected by the node controller for a set period time. Any voltage change, associated with taking the tested cell offline, is compensated by one or more other cells in the battery pack. The overall pack current and voltage remains substantially unchanged (based on the application demands), while the in-situ leakage current testing is initiated, performed, and/or completed. The OCV changes are then used to determine the leakage current of the tested cell and, in some examples, to determine the state of health of this cell and/or adjust the operating parameters of this cell.