Title:
ELECTRIC DRIVE WORK MACHINE
Document Type and Number:
Japanese Patent JP2020125625
Kind Code:
A
Abstract:
To allow an electric drive work machine to move to a charging facility by itself, regardless of a movement distance from a work site to the charging facility.SOLUTION: When an electric drive hydraulic excavator 1 travels from a charging facility 2 to a work site, a controller 100 calculates a reduction amount of a battery 20 used in a travel from a value measured by a battery voltage measurement device 22, sets a warning threshold value V1 based on a value obtained by adding the reduction amount to a preset limit battery voltage V0, and performs warning processing for urging the electric drive hydraulic excavator 1 to move to the charging facility 2 of the battery 20 if the remaining amount of the battery 20 decreases to the warning threshold value V1.SELECTED DRAWING: Figure 3
Inventors:
HO KA
Application Number:
JP2019018225A
Publication Date:
August 20, 2020
Filing Date:
February 04, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E02F9/20; B60L3/00; B60L50/40; B60L50/50; B60L53/00; B60L55/00; B60L58/00; H02J7/00
Domestic Patent References:
| JP2009256988A | 2009-11-05 | |||
| JPH11107320A | 1999-04-20 | |||
| JP2009197515A | 2009-09-03 | |||
| JP2020159055A | 2020-10-01 |
Foreign References:
| WO2020065996A1 | 2020-04-02 |
Attorney, Agent or Firm:
Kaichi International Patent Office