Method to prevent power reduction
A method is disclosed for preventing a power reduction in an electric drive system of a vehicle ( 3 ) during a journey of the vehicle. The method includes a component-tempering process (P 2 ) in which at least one component ( 4, 5, 6 ) of the electric drive system is tempered, such that the method comprises a power reduction prediction process (P 1 ) in which it is checked whether a power reduction is to be expected during a journey. The component-tempering process (P 2 ) is initiated as soon as the power reduction prediction process (P 1 ) has recognized that a power reduction is to be expected during the journey.
1 . A method for preventing a power reduction in an electric drive system of a vehicle during a journey of the vehicle, wherein the electric drive system is configured to temper at least one component of the electric drive system, the method comprising:
determining, by the electric drive system, that a power reduction is to be expected during a journey, including estimating, based on a maximum cooling power and with the use of a temperature model of the electric drive system, whether during the journey any component of the electric drive system will exceed a respective maximum temperature; and
initiating tempering, by the electric drive system, after determining that the power reduction is to be expected during the journey.
2 . The method according to claim 1 , wherein determining that the power reduction is to be expected during the journey includes predicting an uphill driving path or a downhill driving path.
3 . The method according claim 1 , wherein tempering the at least one component includes heating a battery.
4 . The method according to claim 1 , wherein tempering the at least one component includes cooling one or more of an inverter, an electric motor, and a battery.
5 . The method according claim 4 , wherein tempering the at least one component includes heating the battery.
6 . The method according to claim 1 , comprising:
determining that cooling and/or heating is no longer necessary; and
terminating tempering of the at least one component.
7 . The method according to claim 6 , wherein determining that cooling and/or heating is no longer necessary is performed using the temperature model of the electric drive system.
8 . A method for preventing a power reduction in an electric drive system of a vehicle during a journey of the vehicle, wherein the electric drive system is configured to temper at least one component of the electric drive system, and wherein the vehicle includes a vehicle-to-vehicle communication system and a system for taking account of one or more environmental data, the method comprising:
determining, by the electric drive system, that a power reduction is to be expected during a journey; and
initiating tempering, by the electric drive system, after determining that the power reduction is to be expected during the journey.
9 . The method of claim 8 , wherein determining that the power reduction is to be expected during the journey includes estimating, based on a maximum cooling power and with the use of a temperature model of the electric drive system, whether during the journey any component of the electric drive system will exceed a respective maximum temperature.
10 . An electric drive system comprising a control unit configured to carry out the method of claim 1 .
11 . A vehicle comprising a control unit configured to perform the method according to claim 1 .
12 . A non-transitory computer-readable medium comprising commands which, when executed by a computer or a control unit, perform the method of claim 1 .