US 12,316,148 B1
Detection and verification of disconnection of a battery from a battery charger
Jan Lindh, Växjö (SE); and Isak Frank, Växjö (SE)
Assigned to Micropower Group AB, Växjö (SE)
Appl. No. 18/873,843
Filed by Micropower Group AB, Växjö (SE)
PCT Filed Jun. 19, 2023, PCT No. PCT/EP2023/066510
§ 371(c)(1), (2) Date Dec. 11, 2024,
PCT Pub. No. WO2024/002762, PCT Pub. Date Jan. 4, 2024.
Claims priority of application No. 2250807-1 (SE), filed on Jun. 29, 2022.
Int. Cl. H02J 7/00 (2006.01); G01R 19/165 (2006.01)
CPC H02J 7/0036 (2013.01) [G01R 19/16571 (2013.01); G01R 19/16576 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for detecting whether a battery (110) is disconnected from a battery charger (120), the method comprising the steps of:
determining (S1) if the battery charger (120) is charging the battery (110),
obtaining (S2) a charger model indicative of a first expected output voltage (Umod1) of the battery charger (120) as a function of time when the battery charger (120) is connected to, but is not charging, the battery (110), and
upon determining that the battery charger (120) is not charging the battery (110):
measuring (S3) a first measured output voltage (Umeas1) of the battery charger (120) as a function of time; and
determining (S4) if the battery (110) is disconnected from the battery charger (120) based on whether the first measured output voltage (Umeas1) differs from the first expected output voltage (Umod1) by more than a first threshold value at one or more corresponding points of time.