Scheme Based on Economic Analysis of Energy Consumption about Lithium-Electric Excavator Hydraulic System

Abstract

The Lithium-electric Excavator Hydraulic System (Li-EEHS) is based on economic analysis of energy consumption, and it has changed the excavator counterweight into Lithium-ion Battery in order to replace the engine. A computational analysis which takes the Qingdao heavy industry excavator HW130 as the example demonstrates the accessibility of the scheme. The total efficiency of the excavator has been improved from 7% to 17.1% by the Li-EEHS without energy regeneration, while the cost has been decreased from 750¥/day into 240¥/day. And the cost recovery will take around 3.3 years (about 500,000¥).The article typically analyzes the system scheme and the working features for 4 major Li-EEHS.