Electric excavator and management system

Abstract

To realize efficient charging.SOLUTION: An electric excavator according to an embodiment of the present disclosure includes an electric motor, a battery that supplies power to the electric motor, a detection unit that detects the temperature of the battery, and a heating mechanism that heats the battery, and when the temperature of the battery detected by the detection unit is lower than a first reference temperature while an external power source is chargeably connected to the battery, the battery is configured to be heated by a heating mechanism using electric power supplied from the external power source before starting charging of the battery by the external power source.SELECTED DRAWING: Figure 3

Claims

1. Electric motor and, A battery that supplies power to the aforementioned electric motor, A detection unit for detecting the temperature of the battery, The battery has a heating mechanism for heating the battery, If, while an external power supply is connected to the battery in a rechargeable manner, the temperature of the battery detected by the detection unit is lower than the first reference temperature, the heating mechanism heats the battery using the power supplied from the external power supply before charging the battery by the external power supply begins. While the heating mechanism is heating the battery using power supplied from the external power source, if the temperature of the battery detected by the detection unit rises above a second reference temperature which is higher than the first reference temperature, the heating mechanism continues to heat the battery using power supplied from the external power source, and the battery is also charged using power supplied from the external power source. Electric excavator.

2. As the temperature of the battery detected by the detection unit rises above the first reference temperature, the amount of power supplied to the battery from the external power source is increased, and the amount of power supplied to the heating mechanism from the external power source is decreased. The electric excavator according to claim 1.

3. Store time information, The battery is configured to be fully charged at the time indicated by the aforementioned time information, and the temperature of the battery detected by the detection unit is configured to be higher than the second reference temperature due to heating by the heating mechanism. The electric excavator according to claim 1 or 2.

4. The aforementioned time information is one or more of the following: information indicating a time input via an input device provided by the electric excavator; information indicating a time transmitted from an external device; information indicating a time automatically set by a management device that manages the work site where the electric excavator is working, according to pre-created work schedule information; and information indicating a time generated based on the work history information of past work performed by the electric excavator. The electric excavator according to claim 3.

5. The heating mechanism is a mechanism that guides a liquid heated by an air conditioning system that adjusts the air in the cabin of the electric excavator into a flow path provided near the battery, or a heating element that heats the battery. An electric excavator according to any one of claims 1 to 3.

6. A management system comprising an electric excavator, a first communication terminal capable of communicating with the electric excavator, and a second communication terminal capable of communicating with the electric excavator, The aforementioned electric shovel is Electric motor and, A battery that supplies power to the aforementioned electric motor, A detection unit for detecting the temperature of the battery, The battery has a heating mechanism for heating the battery, The first communication terminal is, The system displays screen information for accepting input of charging condition information indicating the conditions for starting charging the aforementioned battery. It is configured to transmit the charging condition information entered from the screen information, The aforementioned electric shovel is Upon receiving the aforementioned charging condition information, When charging the battery according to the conditions indicated in the charging condition information while an external power supply is connected to the battery in a rechargeable manner, if the temperature of the battery detected by the detection unit is lower than the first reference temperature, the heating mechanism heats the battery using power supplied from the external power supply. The aforementioned charging condition information is transmitted, The aforementioned second communication terminal is The system is configured to receive the aforementioned charging condition information and to display screen information representing the received charging condition information. Management system.

7. The aforementioned electric shovel is The system is configured to transmit one or more of the following: notification information indicating that charging will be started based on the charging condition information; notification information indicating that charging has been started based on the charging condition information; and notification information indicating that the conditions for completing charging have been met. The management system according to claim 6.

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