Patent ID: 9726730
Date: 2017-08-08
CPC Classifications: G01R

Claim:
1. A method for determining a State of Health (SoH) of a power source of a portable communication device, the method comprising: extracting, with a processor of the portable communication device, at least one device parameter from said portable communication device; obtaining, with the processor, a start voltage value of said power source and a time stamp indicative of the time said start voltage value is obtained; activating, with the processor, software components installed on said portable communication device to electrically load hardware of said device; identifying, with the processor, at least a first voltage drop relative to said start voltage value; calculating, with the processor, based on pairs of consecutive voltage readings a voltage change value; comparing, with the processor, said calculated voltage change value of said power source to threshold values stored in a database; and determining, with the processor, said State of Health of said power source based on said comparison of said calculated voltage change value and said threshold values, wherein at least one of said threshold values is calculated based on at least one of: a mean voltage drop rate and standard deviation of a first cluster of power sources known to have a good state of health; a mean voltage drop rate and standard deviation of a second cluster of power sources known to have a bad state of health; and clustering algorithm.