US 12,420,770 B2
Method of power management and a power system of an electrically powered vehicle
Simon Berntsson, Gothenburg (SE)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
Filed on Jun. 30, 2021, as Appl. No. 17/363,946.
Claims priority of application No. 20183445 (EP), filed on Jul. 1, 2020.
Prior Publication US 2022/0001848 A1, Jan. 6, 2022
Int. Cl. B60W 10/26 (2006.01); B60L 1/00 (2006.01); B60R 16/033 (2006.01)
CPC B60W 10/26 (2013.01) [B60L 1/00 (2013.01); B60R 16/033 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for power management of an electrically powered vehicle, wherein at least two electrical loads including a first electrical load, which is an electrical propulsion system of the vehicle, and a plurality of second electrical loads, which are an auxiliary load and/or a power take-off of the vehicle, are by default powered by an electric energy storage system of the vehicle according to a first prioritization strategy determining how power is distributed among the at least two loads, wherein the plurality of second electrical loads comprises a device that requires a certain power to operate correctly and a device that performs non-critical operations, or is not sensitive to temporary interruptions, the method comprising:
detecting that a pre-defined operating condition applies, the pre-defined operating condition is a condition in which the electrical propulsion system of the vehicle has an increased power demand due to a transient condition comprising hill starts, gearshifts, and/or starting during cold weather, resulting in a detected pre-defined operating condition,
in response to said detection, activating a second prioritization strategy, wherein, according to the second prioritization strategy, power distribution to the first load is prioritized over power distribution to the plurality of second loads, wherein the device that requires the certain power to operate correctly is provided with a pre-determined set-point for power distribution such that the device is allowed to keep running during the second prioritization strategy, but at a limited level of power consumption, and wherein the device that performs non-critical operations, or is not sensitive to temporary interruptions, is not provided with a pre-determined set-point, wherein the second prioritization strategy comprises limiting distributed power to the device that requires the certain power to operate correctly to the predetermined set-point and limiting distributed maximum power to the device that performs non-critical operations, or is not sensitive to temporary interruptions, to a dynamic set-point, wherein the dynamic set-point is set in dependence of the detected pre-defined operating condition.