US 11,953,540 B1
Battery diode fault monitoring
Geoffrey Alan Long, Montara, CA (US); Jing Xue, San Jose, CA (US); and Khoichi Lawrence Takayama, San Jose, CA (US)
Assigned to Wisk Aero LLC, Mountain View, CA (US)
Filed by Wisk Aero LLC, Mountain View, CA (US)
Filed on Apr. 26, 2021, as Appl. No. 17/240,519.
Application 17/240,519 is a continuation of application No. 16/177,255, filed on Oct. 31, 2018, granted, now 11,016,140.
Int. Cl. G01R 31/26 (2020.01); H01M 50/572 (2021.01)
CPC G01R 31/2632 (2013.01) [H01M 50/572 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A power system, comprising:
a load node;
a first power source, comprising:
a first battery,
a first switch, connected to the first battery, and
a first diode, connected to the first switch and to the load node;
a second power source, comprising:
a second battery,
a second switch, connected to the second battery, and
a second diode, connected to the second switch and to the load node; and
a processor, configured to selectively control the first switch to electrically connect the first battery to the load node, and to selectively control the second switch to electrically connect the second battery to the load node,
wherein the processor is further configured to test the first diode while the first battery is electrically isolated from the load node.