University of Michigan

Bayerische Motoren Werke Aktiengesellschaft

Mingxuan Zhang

Anna G Stefanopoulou

Jason Benjamin Siegel

Gregory B Less

Ting Cai

Sravan Pannala

Thoralf Reis

Benoit Sauts

An electrical device comprises a battery cell; a pressure sensor for measuring swelling forces of the battery cell, optionally with voltage, temperature and current sensors, and a battery management system including a controller. The controller executes a program to: (i) determine a reference swelling force corresponding to a reference electrical signal received from the pressure sensor at an earlier reference time, (ii) determine a second swelling force corresponding to a second electrical signal received from the pressure sensor at a later second time, and (iii) determine whether a risk of internal short circuit of the battery cell exists by comparing a reference level of the reference electrical signal and a signal representative of the second electrical signal. When the signal representative of the second electrical signal exceeds the reference level of the reference electrical signal by a threshold amount, a risk of internal short circuit of the cell exists.

Detection of an internal short circuit in a battery

Growing community of inventors

Beijing, China

Mingxuan Zhang