US 11,912,161 B2
System for on-site diagnosis of the battery of an electric bicycle
Maël Bosson, Grenoble (FR); Raphaël Marguet, Grenoble (FR); and Theophile Alary, Grenoble (FR)
Assigned to EBIKELABS, Grenoble (FR)
Appl. No. 17/309,035
Filed by EBIKELABS, Grenoble (FR)
PCT Filed Sep. 25, 2019, PCT No. PCT/FR2019/052261
§ 371(c)(1), (2) Date Apr. 15, 2021,
PCT Pub. No. WO2020/079336, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 1859568 (FR), filed on Oct. 16, 2018.
Prior Publication US 2022/0024348 A1, Jan. 27, 2022
Int. Cl. B60L 58/16 (2019.01); H02P 29/60 (2016.01); G01R 31/392 (2019.01); B60L 50/20 (2019.01); H02J 7/00 (2006.01); B60L 3/12 (2006.01); H02P 27/06 (2006.01)
CPC B60L 58/16 (2019.02) [B60L 3/12 (2013.01); B60L 50/20 (2019.02); G01R 31/392 (2019.01); H02J 7/005 (2020.01); H02J 7/007 (2013.01); H02P 27/06 (2013.01); H02P 29/60 (2016.02); B60L 2200/12 (2013.01); B60L 2240/425 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for diagnosing a rechargeable electric vehicle battery, the method comprising the following steps performed on the vehicle while the vehicle is not being used:
discharging the battery into a motor of the vehicle, using an internal resistance of the motor as a resistive load;
controlling the motor so that it consumes current while achieving near zero efficiency;
measuring parameters of the battery during discharge to establish a state of health of the battery, wherein the state of health includes battery capacity;
estimating a temperature of the motor during discharge; and
regulating a discharge current to stabilize the temperature of the motor at a constant admissible threshold.