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. 17, 2019
Filed:
Dec. 31, 2018
Sf Motors, Inc., Santa Clara, CA (US);
Saeed Khaleghi Rahimian, San Jose, CA (US);
Sangwoo Han, Mountain View, CA (US);
Junzhe Shi, Santa Clara, CA (US);
Wenke Zhang, Santa Clara, CA (US);
Ying Liu, Santa Clara, CA (US);
Jun Hou, San Mateo, CA (US);
Chen-Yen Yu, San Jose, CA (US);
Yifan Tang, Santa Clara, CA (US);
SF Motors, Inc., Santa Clara, CA (US);
Abstract
Battery health is determined by estimating a battery anode capacity, battery cathode capacity, and cyclable lithium capacity. Determining electrode and lithium capacity may include determining anode and cathode open cell voltages (OCV) at the beginning of battery life, and estimating the full cell OCV from the individual (half-cell) OCV values. Once the beginning of battery life information is known, the state of charge (SOC) for a battery is measured during battery life. The SOC measurements may be captured at a plurality of different levels. The cathode capacity, anode capacity, and cycle mobile lithium capacity are then determined from the beginning of life OCV data and plurality of SOC data. The capacities can be used to detect degradation, and a battery management system can take steps to reduce further degradation based on the capacity values.