Balancing charge level of batteries
The present disclosure relates to a dual battery system ( 1 ) comprising a first battery (B1) and a second battery (B2), for balancing charge level of the first battery and the second battery, the dual battery system being adapted for powering propulsion of an electric vehicle ( 3 ) comprising a first electric motor (E1) coupled in driving relationship with one or more rear wheels of the electric vehicle and a second electric motor (E2) coupled in driving relationship with one or more front wheels of the electric vehicle. The first battery is adapted to provide electric power for driving the first electric motor and the second battery is adapted to provide electric power for driving the second electric motor. The dual battery system obtains ( 100 ) at least one of data or information of a predetermined and/or imminent charging event of the electric vehicle. The dual battery system furthermore obtains ( 200 ) at least one of data or information of charge level of the first battery and second battery respectively. Moreover the dual battery system selects ( 300 ), when the charge level of the first battery and the second battery are unbalanced, a driving scenario which comprises charging and/or discharging of at least one of the first battery and the second battery, the driving scenario balancing the charge level of the first battery and the second battery prior to arriving at the predetermined and/or imminent charging event. The disclosure also relates to a dual battery system in accordance with the foregoing, and an electric vehicle comprising such a dual battery system.
1 . A method performed by a dual battery system comprising a first battery and a second battery, for balancing charge level of the first battery and the second battery, the dual battery system being adapted for powering propulsion of an electric vehicle comprising a first electric motor coupled in driving relationship with one or more rear wheels of the electric vehicle and a second electric motor coupled in driving relationship with one or more front wheels of the electric vehicle, the first battery being adapted to provide electric power for driving the first electric motor and the second battery being adapted to provide electric power for driving the second electric motor,
the method comprising:
obtaining at least one of data or information of a predetermined or imminent charging event of the electric vehicle referring to at least one of: an estimated timing, a remaining time, or a remaining distance for the electric vehicle to reach at least one of: an electric vehicle supply equipment (EVSE) or a charging station,
obtaining at least one of data or information of charge level of the first battery and second battery respectively, and
selecting, when the charge level of the first battery and the second battery are unbalanced, a driving scenario which comprises charging or discharging of at least one of the first battery and the second battery, the driving scenario balancing the charge level of the first battery and the second battery prior to arriving at the predetermined and/or imminent charging event.
2 . The method according to claim 1 , wherein the driving scenario comprises propelling the electric vehicle by providing electric power solely from one battery of the first battery and the second battery with a highest charge level.
3 . The method according to claim 1 , wherein the driving scenario comprises charging of one battery of the first battery and the second battery with lowest charge level by means of regenerative braking of at least one of the one or more front wheels or the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor, wherein at least one of the first electric motor and the second electric motor comprises having an electric power transmission connection with the one battery with the lowest charge level.
4 . The method according to claim 1 , wherein the driving scenario comprises using excessive power from one battery of the first and second battery with a highest charge level by applying an excessive torque on at least one of the one or more front wheels and the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor, wherein at least one of the first electric motor and the second electric motor is powered by the one battery with highest charge level while simultaneously charging another battery of the first and second battery using regenerative braking of the at least one of the one or more front wheels and the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor powered by another battery of the first and second battery.
5 . The method according to claim 4 , wherein the driving scenario allows a velocity of the electric vehicle set by a vehicle occupant and/or by a drive control system of the electric vehicle, to remain unaffected.
6 . The method according to claim 1 , wherein the driving scenario overrides any current all-wheel drive, AWD, rear-wheel drive, RWD, or front-wheel drive, FWD, of the electric vehicle.
7 . The method according to claim 1 , wherein the data or information of the predetermined and/or imminent charging event is obtained from a vehicle occupant of the electric vehicle, via a user interface, and/or obtained from a drive control system of the electric vehicle.
8 . A dual battery system comprising a first battery and a second battery, for balancing charge level of the first battery and the second battery, the dual battery system being adapted for powering propulsion of an electric vehicle comprising a first electric motor coupled in driving relationship with one or more rear wheels of a second electric motor coupled in driving relationship with one or more front wheels of the electric vehicle, the first battery being adapted to provide electric power for driving the first electric motor and the second battery being adapted to provide electric power for driving the second electric motor, the dual battery system being adapted to:
obtain at least one of data and/or information of a predetermined and/or imminent charging event of the electric vehicle referring to at least one of: an estimated timing, a remaining time, or a remaining distance for the electric vehicle to reach at least one of: an electric vehicle supply equipment (EVSE) or a charging station,
obtain at least one of data and/or information of charge level of the first battery and the second battery respectively, and
select, when the charge level of the first battery and the second battery are unbalanced, a driving scenario comprising charging and/or discharging of at least one of the first battery and the second battery, the driving scenario balancing the charge level of the first battery and the second battery prior to arriving at the predetermined and/or imminent charging event.
9 . The dual battery system according to claim 8 , wherein the driving scenario comprises propelling the electric vehicle by providing electric power solely from one battery of the first battery and the second battery with a highest charge level.
10 . The dual battery system according to claim 8 , wherein the driving scenario comprises charging of one battery of the first battery and the second battery with a lowest charge level by means of regenerative braking of at least one of the one or more front wheels or the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor, wherein at least one of the first electric motor and the second electric motor comprises an electric power transmission connection with the one battery with the lowest charge level.
11 . The dual battery system according to claims 8 , wherein the driving scenario comprises using excessive power from one battery of the first and second battery with a highest charge level by applying an excessive torque on at least one of the one or more front wheels and the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor, wherein at least one of the first electric motor and the second electric motor is powered by the one battery with highest charge level while simultaneously charging another battery of the first and second battery using regenerative braking of the at least one of the one or more front wheels and the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor powered by another battery of the first and second battery.
12 . The dual battery system according to claim 11 , wherein the driving scenario allows a velocity of the electric vehicle set by a vehicle occupant and/or a drive control system of the electric vehicle, to remain unaffected.
13 . The dual battery system according to claim 8 , wherein the driving scenario overrides any current all-wheel drive, AWD, rear-wheel drive, RWD, or front-wheel drive, FWD, of the electric vehicle.
14 . The dual battery system according to claim 8 , wherein the data or information of the predetermined and/or imminent charging event is obtained from a vehicle occupant of the electric vehicle, via a user interface, and/or obtained from a drive control system of the electric vehicle.
15 . The electric vehicle comprising the first electric motor coupled in driving relationship to one or more rear wheels of the electric vehicle and the second electric motor coupled in driving relationship to one or more front wheels of the electric vehicle, the electric vehicle comprising the dual battery system according to claim 8 .
16 . A method performed by a dual battery system comprising a first battery and a second battery, for balancing charge level of the first battery and the second battery, the dual battery system being adapted for powering propulsion of an electric vehicle comprising a first electric motor coupled in driving relationship with one or more rear wheels of the electric vehicle and a second electric motor coupled in driving relationship with one or more front wheels of the electric vehicle, the first battery being adapted to provide electric power for driving the first electric motor and the second battery being adapted to provide electric power for driving the second electric motor,
the method comprising:
obtaining at least one of data or information of a predetermined and/or imminent charging event of the electric vehicle referring to at least one of: an estimated timing, a remaining time, or a remaining distance for the electric vehicle to reach at least one of: an electric vehicle supply equipment (EVSE) or a charging station,
obtaining at least one of data or information of charge level of the first battery and second battery respectively, and
selecting, when the charge level of the first battery and the second battery are unbalanced, a driving scenario which comprises charging and/or discharging of at least one of the first battery and the second battery, the driving scenario balancing the charge level of the first battery and the second battery prior to arriving at the predetermined and/or imminent charging event.
17 . The method according to claim 16 , wherein the driving scenario comprises propelling the electric vehicle by providing electric power solely from one battery of the first battery and the second battery with a highest charge level.
18 . The method according to claim 16 , wherein the driving scenario comprises charging of one battery of the first battery and the second battery with a lowest charge level by means of regenerative braking of at least one of the one or more front wheels or the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor, wherein at least one of the first electric motor and the second electric motor comprises an electric power transmission connection with the one battery with the lowest charge level.
19 . The method according to claim 16 , wherein the driving scenario comprises using excessive power from one battery of the first and second battery with a highest charge level by applying an excessive torque on at least one of the one or more front wheels and the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor, wherein at least one of the first electric motor and the second electric motor is powered by the one battery with highest charge level while simultaneously charging another battery of the first and second battery using regenerative braking of the at least one of the one or more front wheels and the one or more rear wheels respectively coupled in driving relationship with the first electric motor and the second electric motor powered by another battery of the first and second battery.
20 . The method according to claim 19 , wherein the driving scenario allows a velocity of the electric vehicle set by a vehicle occupant and/or by a drive control system of the electric vehicle, to remain unaffected.