US 12,409,758 B2
Control unit for an electric power transmission system
Christoffer Wedding, Gothenburg (SE); Andreas Stockman, Västra Frölunda (SE); and Emil Sjunnesson, Gothenburg (SE)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Appl. No. 17/597,557
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
PCT Filed Jul. 11, 2019, PCT No. PCT/EP2019/068728
§ 371(c)(1), (2) Date Jan. 11, 2022,
PCT Pub. No. WO2021/004639, PCT Pub. Date Jan. 14, 2021.
Prior Publication US 2022/0258649 A1, Aug. 18, 2022
Int. Cl. B60L 58/40 (2019.01); B60L 1/00 (2006.01); B60L 53/22 (2019.01)
CPC B60L 58/40 (2019.02) [B60L 1/006 (2013.01); B60L 53/22 (2019.02); B60L 2200/36 (2013.01); B60L 2200/40 (2013.01); B60L 2210/40 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A control unit for an electric power transmission system to be comprised in a vehicle or vessel, the electric power transmission system comprising the control unit, an energy storage system for storing electrical energy, a charging interface for connecting to an external power supply grid and at least one electrical power take-off interface for connecting to an external power load, the at least one electrical power take-off interface being connected to the energy storage system in a way allowing energy transfer to the external power load, the at least one electrical power take-off interface being connectable to the charging interface in a way allowing energy transfer, the control unit being configured to perform the following operations:
receiving information about an upcoming current increase for energy supply via the at least one electrical power take-off interface to the external power load, which information is sent from the external power load as a signal, configuring the at least one electrical power take-off interface to be supplied with energy from the energy storage system, and
controlling the energy supply to the external power load from the energy storage system via the at least one electrical power take-off interface while applying a current limitation to the supplied energy,
determining a stability status of the current supplied from the energy storage system via the at least one electrical power take-off interface while applying the current limitation, and
evaluating the stability status to decide whether to supply the energy via the at least one electrical power take-off interface from the energy storage system or from the external power supply grid, and
switching to the external power supply grid for supplying energy from the external power supply grid via the at least one electrical power take-off interface to the external power load if the stability status is evaluated as stable.