A review of developments in energy storage systems for hybrid excavators

Wang, Hongmei; Wang, Qingfeng; Hu, Baozan

doi:10.1016/j.autcon.2017.03.010

Cited by 64 publications

(17 citation statements)

References 33 publications

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“…Flywheels, supercapacitors and hydraulic accumulators have higher power density than batteries, but they are lacking in energy density, and this makes them more suitable for hybrid architectures, where the main energy source remains the ICE and the energy storage systems are used to follow the power peaks without excessively ramping up the ICE [41], and/or to accumulate energy from the recovery systems. Hydraulic accumulators in particular have extremely high specific power, but they also have the worst energy density, making them more difficult to implement in compact vehicles [42].…”

Section: Energy Storage Systemsmentioning

confidence: 99%

Electrification of Compact Off-Highway Vehicles—Overview of the Current State of the Art and Trends

et al. 2021

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Electrified vehicles have undergone great evolution during the last decade because of the increasing attention paid on environmental sustainability, greenhouse gas emissions and air pollution. Emission regulations are becoming increasingly tight, and governments have been allocating multiple funds to facilitate the spreading of the so-called green mobility. In this context, steering towards electrified solutions not only for passenger vehicles, but also for compact off-highway vehicles extensively employed, for instance, on construction sites located in urban areas, warehouses, and greenhouses, is essential even if seldom considered. Moreover, the electrification of compact off-highway machinery may allow manufacturers to increase their expertise in and lower the costs of these alternative solutions, while gathering useful data to be applied in bigger and more remunerative off-highway vehicles. In fact, while electric automobiles are as of now real alternatives for buyers, off-highway vehicles, regardless of the application, are mostly in the research and experimental phase, with few of them already on the market. This delay, in comparison with the passenger automotive industry, is caused by different factors, mostly related to the different tasks of off-highway vehicles in terms of duty cycles, productivity performance parameters and user acceptability. The aim of this paper is to give an overview of the many aspects of the electrification of compact off-highway vehicles, to highlight the key differences between on-highway and off-highway vehicles and to summarize in a single source of information the multiple solutions investigated by researchers and manufacturers.

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Section: Energy Storage Systemsmentioning

confidence: 99%

Electrification of Compact Off-Highway Vehicles—Overview of the Current State of the Art and Trends

et al. 2021

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“…As for the super capacitor, although the power density of super capacitors is high and has a long service life, but the cost is high, the energy density is low, and the endurance is poor. Therefore, it is important to select the energy storage units reasonably to improve the performance and energy saving characteristics of hybrid power system [15] .…”

Section: Figure 1 Series Type Hybrid Power Train Systemmentioning

confidence: 99%

Parameter Matching and Control of Series Hybrid Hydraulic Excavator Based on Electro-Hydraulic Composite Energy Storage

Hong-mei

Wang

2020

IEEE Access

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Traditional excavators driven by diesel engine have poor emissions and low energy efficiency. Pure electric driven excavators have high cost and limited endurance. Therefore, at present, hybrid power train system is an ideal candidate for excavators to realize energy-saving and emission reduction. In this paper, a novel series hybrid hydraulic excavator based on electro-hydraulic composite energy storage, which provides the average power of the system through the diesel engine, and the battery and accumulator are used as the intermediate energy storage devitalize the output current of the battery, and improve the service life of the battery, is proposed. Advantages of high energy density of battery and high power density of hydraulic accumulator are synthetically utilized. A 7-ton crawler excavator is taken as the research object, according to typical load spectrum, through analysis method and modeling method, and using dynamic programming (DP) to optimize the parameters of the novel series power train system. The control strategy of the power system is further studied, and the AMESim and Simlink co-simulation models of the transmission system is established to verify the feasibility of the system. At last, the experimental platform is built. Experiments are conducted to verify the effectiveness of the power train system.

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“… a The conversion rate of USD to RM is 1:4.3b Data are collected from (Kyriakopoulos and Arabatzis, 2016)– (Aneke and Wang, 2016);c Data are collected from (Kyriakopoulos and Arabatzis, 2016; Atherton et al , 2017; Assembayeva* et al , 2017; Wang et al , 2017);d Data are collected from (Gallo et al , 2016)– (Assembayeva* et al , 2017);e Data are collected from (Assembayeva* et al , 2017), (Wang et al , 2017);f Data are collected from (Atherton et al , 2017; Gallo et al , 2016; Assembayeva* et al , 2017; Wang et al , 2017);g Data are collected from (Atherton et al , 2017; Assembayeva* et al , 2017; Aneke and Wang, 2016);h Data are collected from (Kyriakopoulos and Arabatzis, 2016; Zafirakis, 2010; Aneke and Wang, 2016);i Data are collected from (Kyriakopoulos and Arabatzis, 2016; Aneke and Wang, 2016)…”

Section: Figurementioning

confidence: 99%

A comprehensive methodology for setting up rural electrifications with minimum budgets on indigenous villages in Malaysia

Soon

Chua

Lim

et al. 2019

IJESM

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Purpose This paper aims to propose a comprehensive methodology for setting up rural electrifications for indigenous villages with minimum budgets and the lowest possible cost of electricity (COE). The electricity accessibility of rural area in Malaysia is not fully covered and the cost of extending the grid to these areas can be high as RM 2.7m per km. Lack of vigorous policies and economic attraction of the rural areas are also the main barriers to rural electrification. Electricity is an essential element of economic activities and the lack of electricity exacerbates poverty and contributes to its perpetuation. Therefore, a hybrid standalone power system can be an alternative solution for the rural electrification. A hybrid standalone power system is studied to investigate the potential of the implementation and the budget required. Design/methodology/approach A site survey has been carried out in a village in Peninsular Malaysia, namely, Kampung Ulu Lawin Selatan. A standalone hybrid system is modeled in HOMER Pro software and the data collected from the selected site are used to obtain the system configuration with the lowest COE. The load following and cycle charging energy dispatch methods are compared to identify the optimal system configuration that yields the lowest COE. The diesel generator-only system is chosen as a benchmark for comparisons. Findings The results show that the hybrid system constituted from the diesel generator, photovoltaic (PV), micro-hydro and energy storage using the load following energy dispatch method yields the lowest COE of RM 0.519 per kWh. The COE of the hybrid system is 378 per cent lower than that of the diesel generator-only system. The lead-acid energy storage system (ESS) is able to reduce 40 per cent of COE as compared to the system without ESS. Originality/value The results indicate that the COE of the diesel-micro hydro-PV-ESS system with load following dispatch strategy is RM 0.519 per kWh, and this value is 35 per cent higher than the average electricity price in Malaysia. However, it is important to note that the costs of extending the grid to the rural area are not taken into account. If this cost is considered into the electricity price, then the standalone hybrid power system proposed by this study is still a competitive alternative for rural electrification.

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A review of developments in energy storage systems for hybrid excavators

Cited by 64 publications

References 33 publications

Electrification of Compact Off-Highway Vehicles—Overview of the Current State of the Art and Trends

Electrification of Compact Off-Highway Vehicles—Overview of the Current State of the Art and Trends

Parameter Matching and Control of Series Hybrid Hydraulic Excavator Based on Electro-Hydraulic Composite Energy Storage

A comprehensive methodology for setting up rural electrifications with minimum budgets on indigenous villages in Malaysia

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