US 12,461,163 B2
System and method for determining a state of health of a battery pack
Paul Thomas Geantil, San Diego, CA (US)
Assigned to FLUX POWER, INC., Vista, CA (US)
Filed by Flux Power, Inc., Vista, CA (US)
Filed on Nov. 19, 2021, as Appl. No. 17/531,164.
Claims priority of provisional application 63/116,842, filed on Nov. 21, 2020.
Prior Publication US 2022/0163596 A1, May 26, 2022
Int. Cl. G01R 31/392 (2019.01); G01R 31/367 (2019.01); G01R 31/374 (2019.01)
CPC G01R 31/392 (2019.01) [G01R 31/367 (2019.01); G01R 31/374 (2019.01)] 22 Claims
OG exemplary drawing
 
1. A method of determining battery conditions for a fleet of vehicles comprising:
determining, in a battery management system at each vehicle in the fleet of vehicles, a depth of discharge prior to charging a battery;
storing the depth of discharge in a memory associated with the battery management system at each vehicle in the fleet of vehicles;
determining an average depth of discharge over a time period in the battery management system at each vehicle in the fleet of vehicles based on the depth of discharge stored in the memory;
determining a cycle life estimation based on the average depth of discharge in the battery management system at each vehicle in the fleet of vehicles;
determining a state of health of the battery based on the cycle life estimation in the battery management system at each vehicle in the fleet of vehicles;
communicating the state of health of the battery from each vehicle of the fleet of vehicles to a central monitoring system;
displaying a state of health indicator on a display associated with the central monitoring system for each vehicle in the fleet of vehicles;
comparing the average depth of discharge for each vehicle to a usage threshold of past usage for a time period; and
setting a state of charge range for charging and operating each vehicle based on the comparing the average depth of discharge for each vehicle to the usage threshold of past usage for the time period, the state of charge range corresponding to an amount of charging to apply to the battery.