電動式建設機械 - Hitachi Construction Machinery Co., Ltd.

Title:

電動式建設機械

Document Type and Number:

Japanese Patent JP5778752

Kind Code:

B2

Abstract:

Provided is an electric construction machine capable of avoiding a situation where charging is difficult to achieve due to the exhaustion of a battery device. An electrically-operated hydraulic excavator includes an electric motor 31, a hydraulic pump 33 that is driven by the electric motor 31, hydraulic actuators 13A, 13B, 19 to 21 that are driven by hydraulic fluid discharged from the hydraulic pump 33, and a battery device 7 that serves as an electrical power source for the electric motor 31. The battery device 7 includes battery systems 56A, 56B that each have a plurality of batteries 55. A selector switch 28 makes it possible to select either one of the battery systems 56A, 56B. An arithmetic control section 53 of an inverter device 32 controls connection change switches 58A, 58B through battery controllers 54A, 54B to change the connections of the battery systems 56A, 56B so that electrical power is supplied to the electric motor 31 from either the battery system 56A or the battery system 56B, whichever is selected by the selector switch 28.

Inventors:

Masayuki Yugami
Akira Noguchi
Tatsuo Takishita
Kurikuma

Application Number:

JP2013500922A

Publication Date:

September 16, 2015

Filing Date:

January 18, 2012

Export Citation:

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