Method And Device For Estimating The Residual Energy Of An Energy Accumulator Of A Motor Vehicle And A Method And Device For Operating A Hybrid Motor Vehicle

A method for operating a motor vehicle having an internal combustion engine, a hybrid drive, and assistance traction drive, the method, comprising:

• estimating a residual energy of an electric energy accumulator that supplies an electric assistance traction drive of a motor vehicle with electrical energy by a process comprising:
• determining a future operating intensity of the assistance traction drive based on at least one input that characterizes a driving style of a section of route lying ahead;
• determining a reserved energy component of the total amount of energy available from the energy accumulator based on the determined future operating intensity and a prescribed consumption parameter that characterizes a drive-specific consumption of electrical energy by the electric assistance traction drive;
• reserving the determined energy component;
• and
• estimating the residual energy by reducing the total amount of energy available by the reserved energy component;
• controlling an operation of the internal combustion engine and an operation of the assistance traction drive as a function of the estimated residual energy.

A device for estimating the residual energy of an electric energy accumulator that supplies an electric assistance traction drive of a motor vehicle with electrical energy, the device comprising:

• an operating prediction apparatus configured to determine a future operating intensity of the assistance traction drive with a data input interface configured to receive messages or values that characterize a driving style of a the section of route lying ahead;
• an apportioning apparatus comprising an input connection configured to receive a consumption parameter that characterizes a drive-specific consumption of electrical energy by the electric assistance traction drive;
• wherein the apportioning apparatus is also configured to assign an energy component of a total amount of energy available from the energy accumulator to a reserve;
• wherein the input connection of the apportioning apparatus is also configured to receive the total amount of energy available;
• and
• the apportioning apparatus comprises a calculation function configured to determine the energy component assigned to the reserve from the determined future operating intensity based on the consumption parameter;
• and
• a range correction apparatus comprising:
• an input connection and an output connection, wherein the input connection of the range correction apparatus is connected to the apportioning apparatus and is thereby configured to receive from the apportioning apparatus the energy component assigned to the reserve;
• and
• a correction function configured to reduce the total amount of energy available by the energy component assigned to the reserve.

A control apparatus of a hybrid drive of a motor vehicle having an internal combustion engine and and assistance traction drive, the control apparatus comprising:

• a device for estimating the residual energy of an electric energy accumulator that supplies an electric assistance traction drive, the device comprising:
• an operating prediction apparatus configured to determine a future operating intensity of the assistance traction drive with a data input interface configured to receive messages or values that characterize a driving style of a the section of route lying ahead;
• an apportioning apparatus comprising an input connection configured to receive a consumption parameter that characterizes a drive-specific consumption of electrical energy by the electric assistance traction drive;
• wherein the apportioning apparatus is also configured, to assign an energy component of a total amount of energy available from the accumulator to a reserve;
• wherein the input connection of the apportioning apparatus is also configured to receive the total amount of energy available;
• and
• the apportioning apparatus comprises a calculation function configured to determine the energy component assigned to the reserve from the determined future operating intensity based on the consumption parameter;
• and
• a range correction apparatus comprising:
• an input connection and an output connection, wherein the input connection of the range correction apparatus is connected to the apportioning apparatus and is thereby configured to receive from the apportioning apparatus the energy component assigned to the reserve;
• and
• a correction function configured to reduce the total amount of energy available by the energy component assigned to the reserve;
• an output connection configured to output control signals that control an internal combustion engine controller, an electric motor controller, and an energy accumulator controller of the hybrid drive;
• and
• output connection of the range correction apparatus and to the output connection of the control apparatus
• wherein the control apparatus is configured to control an operation of the internal combustion engine controller, an operation of the electric motor controller, and an operation of the energy accumulator controller as a function of the estimated residual energy.