ELECTRIC WORK MACHINE, AND CONTROL METHOD OF ELECTRIC WORK MACHINE

• Main Authors: KAWABATA SHINICHI, TAMBA DAIKI
• Format: Patent
• Language: English; Japanese
• Published: 10.07.2024
• Subjects: DREDGING; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; SOIL SHIFTING; TRANSPORTING; VEHICLES IN GENERAL

To efficiently use remaining capacity of a plurality of battery packs.SOLUTION: An electric work machine comprises: a plurality of battery packs; an operating apparatus operated by power supplied from the battery packs; and a control device controlling discharge of the battery packs based on a remaining capacity of each of the plurality of battery packs. The control device determines one of the plurality of battery packs as a discharge battery pack supplying power to the operating apparatus, and when the remaining capacity of the discharge battery pack is less than a limit threshold, performs a limiting process limiting the power supplied from the discharge battery pack to the operating apparatus. The control device makes the limit threshold and/or a content of the limiting process different depending on whether or not there is a battery pack among the plurality of battery packs other than the discharge battery packs that has a remaining capacity equal to or greater than a predetermined second threshold.SELECTED DRAWING: Figure 1 【課題】複数のバッテリパックの残容量を効率良く使用する。【解決手段】電動作業機は、複数のバッテリパックと、バッテリパックから供給される電力によって作動する作動機器と、複数のバッテリパックの各残容量に基づいて、バッテリパックの放電の制御を行う制御装置と、を備え、制御装置は、複数のバッテリパックのうち、いずれか１つを作動機器に電力を供給する放電用バッテリパックとして決定し、放電用バッテリパックの残容量が制限閾値未満である場合に、放電用バッテリパックから作動機器に供給する電力を制限する制限処理を行い、複数のバッテリパックのうち、放電用バッテリパックとは異なるバッテリパックの中に残容量が所定の第２閾値以上であるものが存在する場合と存在しない場合とで、制限閾値及び／又は制限処理の内容を異ならせる。【選択図】図１