| CPC E02F 9/207 (2013.01) [B60L 15/20 (2013.01); B60L 50/60 (2019.02); E02F 9/26 (2013.01); B60L 2200/40 (2013.01); B60L 2240/54 (2013.01); B60L 2260/20 (2013.01)] | 19 Claims |
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1. A control system for an electric off-highway working machine comprising a ground engaging propulsion structure for propelling the working machine, a body supported on the ground engaging propulsion structure, a drive arrangement comprising a battery, an electric motor configured to be powered by the battery, and a transmission operable to transmit drive from the electric motor to the ground engaging propulsion structure, the control system comprising a controller configured to:
receive data relating to a charging location;
receive data relating to a location of the working machine;
calculate a travel energy threshold required to enable the working machine to travel to the charging location;
receive data relating to a state of charge of the battery of the working machine;
compare the travel energy threshold to the state of the charge of the battery;
provide an alert when the state of the charge of the battery is equal to the travel energy threshold;
activate a restricted operation mode of the working machine when the state of the charge of the battery is below the travel energy threshold by a first predetermined amount; and
activate a limp home operation mode when the state of the charge of the battery is below the travel energy threshold by a second predetermined amount greater than the first predetermined amount.
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18. A method for providing an alert for an electric off-highway working machine comprising a ground engaging propulsion structure for propelling the working machine, a body supported on the ground engaging propulsion structure, a drive arrangement comprising a battery, an electric motor configured to be powered by the battery, and a transmission operable to transmit drive from the electric motor to the ground engaging propulsion structure, the method comprising:
receiving data relating to a charging location;
receiving data relating to a location of the working machine;
determining a distance to the charging location;
calculating a travel energy threshold required to enable the working machine to travel to the charging location;
receiving data relating to a state of charge of the battery of the working machine;
comparing the travel energy threshold to the state of the charge of the battery;
providing an alert when the state of the charge of the battery is equal to the travel energy threshold;
activating a restricted operation mode of the working machine when the state of the charge of the battery is below the travel energy threshold by a first predetermined amount; and
activating a limp home operation mode when the state of the charge of the battery is below the travel energy threshold by a second predetermined amount greater than the first predetermined amount.
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19. A control system for an electric off-highway working machine comprising a ground engaging propulsion structure for propelling the working machine, a body supported on the ground engaging propulsion structure, a drive arrangement comprising a battery, an electric motor configured to be powered by the battery, and a transmission operable to transmit drive from the electric motor to the ground engaging propulsion structure, the control system comprising a controller configured to:
receive data relating to a charging location;
receive data relating to a location of the working machine;
calculate a travel energy threshold required to enable the working machine to travel to the charging location;
receive data relating to a state of charge of the battery of the working machine;
compare the travel energy threshold to the state of the charge of the battery;
provide an alert when the state of charge of the battery is equal to the travel energy threshold; and
detect a signal indicating whether the working machine is in a working mode based on one or more of detecting when the working machine is travelling below a predetermined travel speed, an orientation or position of an operator seat, and/or detecting a ground engaging component of the working machine has moved to a ground engaging position from a raised position; and
monitor energy usage of the working machine in the working mode, and to provide an estimated time remaining before the alert is provided.
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