Work machine equipped with an electrical energy storage unit
AssigneeManitou Bf
InventorsElie Kamba, Stéphane Oger
Life of this patent
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Abstract
A work machine including a frame, a propulsion structure, a load-handling apparatus, an electrical energy storage unit, a device for evaluating state of charge configured to determine a value V representative of the state of charge of said electrical energy storage unit, and a control unit configured to: compare the value V with a threshold V1; activate a mode in which movement and handling operations are prohibited when the value V is lower than or equal to the threshold V1; and activate a rescue mode in which the operation of the propulsion structure is authorized when an authorization signal is sent by an authentication device and when the mode in which movement is prohibited is active.
Claims20
A work machine comprising:
- a frame;
- a propulsion structure in contact with a ground surface for moving the work machine;
- a load-handling apparatus mounted to the frame;
- an electrical energy storage unit which is arranged to supply electrical energy to the propulsion structure and to the load-handling apparatus;
- a device configured to determine a value V which is representative of a state of charge of the electrical energy storage unit;
- an authentication device configured to send an authorization signal in response to an authentication action;
- and
- a control unit which is configured to:
- compare the value V to a first threshold V1;
- activate a stop mode in which operation of the propulsion structure and operation of the load-handling apparatus are prevented when the value V is lower than or equal to the first threshold V1;
- and
- activate a rescue mode in which operation of the propulsion structure is authorized in order to move the work machine in response to the authorization signal while the stop mode is active.
A method for controlling a work machine comprising a frame, a propulsion structure in contact with the ground for moving the work machine, a load-handling apparatus mounted to move with respect to the frame, and an electrical energy storage unit that is arranged to supply electrical energy to the propulsion structure and to the load-handling apparatus, the control method comprising:
- determining a value V that represents a state of charge of the electrical energy storage unit;
- comparing the value V with a first threshold V1;
- activating a stop mode in which operation of the propulsion structure and operation of the load-handling apparatus are prevented when the value V is lower than or equal to the first threshold V1;
- and
- activating a rescue mode in which operation of the propulsion structure is authorized in response to an authorization signal from an authentication device, the authorization signal being sent in response to an authentication action while the stop mode is active.
A work machine comprising:
- an electrical energy storage unit configured to supply electrical energy to a propulsion structure and to a load-handling apparatus, the load-handling apparatus being moveably mounted to a frame;
- an evaluation device configured to determine a state of charge of the electrical energy storage unit;
- an authentication device configured to send an authorization signal in response to an authentication action;
- and
- a control unit configured to:
- compare the state of charge with a first threshold value;
- activate a stop mode when the state of charge is lower than or equal to the first threshold value, the stop mode being configured to prohibit operation of the propulsion structure and of the load-handling apparatus;
- and
- activate a rescue mode that permits operation of the propulsion structure in response receiving the authorization signal while the stop mode is active.
Dependencies are inferred from the claim text.