US 12,263,799 B2
Vehicle power supply system, vehicle comprising such system and method for recharging a vehicle battery
Hans Westerlind, Nol (SE); Robert Niemczyk, Greensboro, NC (US); Gregoire Artur Du Plessis, Lyons (FR); Jean-Daniel Bonnet, High Point, NC (US); Bart Potts, Clemmons, NC (US); Joshua Smith, Sophia, NC (US); David De Brito, Charvieu (FR); and Maxime Valero, Oullins (FR)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Appl. No. 17/596,968
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
PCT Filed Jun. 26, 2019, PCT No. PCT/EP2019/067094
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2020/259835, PCT Pub. Date Dec. 30, 2020.
Prior Publication US 2022/0242341 A1, Aug. 4, 2022
Int. Cl. H02J 1/08 (2006.01); B60L 1/00 (2006.01); B60R 16/033 (2006.01); H02J 7/14 (2006.01); H02M 3/00 (2006.01)
CPC B60R 16/033 (2013.01) [B60L 1/00 (2013.01); H02J 1/082 (2020.01); H02J 7/1423 (2013.01); H02M 3/003 (2021.05); H02J 2310/46 (2020.01)] 17 Claims
OG exemplary drawing
 
1. A vehicle power supply system, comprising:
a vehicle battery with a charging voltage,
a DC-to-DC converter comprising two first connection terminals connected to the vehicle battery and two second connection terminals for connecting an external charger to recharge the vehicle battery or for connecting an external battery to be recharged,
wherein, in a first mode in which an external charger is connected to the two second connection terminals, the voltage V2 between the two second connection terminals is an input voltage of the DC-to-DC converter and the voltage V1 between the two first connection terminals is an output voltage of the DC-to-DC converter,
wherein, in a second mode in which an external battery to be recharged is connected to the two second connection terminals, the voltage V1 between the two first connection terminals is an input voltage of the DC-to-DC converter and the voltage V2 between the two second connection terminals is an output voltage of the DC-to-DC converter,
wherein the system also includes a sensor for measuring the voltage V2 between the two second connection terminals, the measuring further comprising:
determining that the voltage V2 is lower than a first threshold and higher than a second threshold,
entering the first mode of the DC-to-DC converter to charge the vehicle battery,
determining that the voltage V2 is lower than the second threshold and higher than a third threshold,
entering the second mode of the DC-to-DC converter to charge the external battery, and
wherein the DC-to-DC converter is controlled so that the output voltage of the converter is equal to the charging voltage of the vehicle battery in the first mode and to a charging voltage of the external battery in the second mode.