On the possibility of wireless battery charging in a gaseous-and-dusty mine

Irina Semykina,Evgeniy Dubkov,Valery Zavyalov,Amet-Han Veliliaev,Q Yao,L Chen,W Qiao,S Gao,S Chen

doi:10.1051/e3sconf/202130301032

Abstract

The article outlines wireless battery charging as a promising direction for electric vehicles. There is the question raised of this technology applicability in the gaseous-and-dusty mine, and for such systems, the method for ignition risk evaluation is described. It is shown that the only potential ignition source is the charging area between the coils of the wireless charger. The authors formulate the objectives for studying the electromagnetic field in the charging area and propose variants of the mathematical description for this field. The research stages are listed which are necessary to substantiate the parameters and operating modes of wireless chargers that are safe for operating in the conditions of the gaseous-and-dusty mine.

Highlights

Underground mining is one of the priority areas of the industry [1]
The research stages are listed which are necessary to substantiate the parameters and operating modes of wireless chargers that are safe for operating in the conditions of the gaseous-and-dusty mine
Those, battery charging in the explosive zone is not dangerous in principle [6] provided that there are no electrical commutations in the battery and load circuits. This circumstance allows us to consider the possibility of using charging systems for batteries of mine transport systems and other mobile equipment in gaseous-and-dusty mines which inherently do not require a wired connection to the grid, and do not require disconnecting the batteries for charging that namely is wireless battery charging [7,8,9]

Summary

Introduction

Underground mining is one of the priority areas of the industry [1]. A significant proportion of underground mines, which primarily are underground coalmines, are classified as gaseous-and-dusty mines that impose stringent requirements for ensuring explosion safety on the equipment used in its technological processes. Considering the high power-to-weight ratio of mines, as well as the mobility of a significant part of the equipment [3], its important component providing energy storage are batteries They are used in lighting devices and mine automation equipment and in transport systems [4] such as mine electric locomotives, LHDs, etc. Those, battery charging in the explosive zone is not dangerous in principle [6] provided that there are no electrical commutations in the battery and load circuits This circumstance allows us to consider the possibility of using charging systems for batteries of mine transport systems and other mobile equipment in gaseous-and-dusty mines which inherently do not require a wired connection to the grid, and do not require disconnecting the batteries for charging that namely is wireless battery charging [7,8,9]. For wireless chargers used in the explosive zone, it is advisable to conduct scientific research aimed at determining the boundary performance indicators ensuring that wireless chargers will not provoke the ignition and explosion of a hazardous explosive atmosphere

Problem statement

Methodology

Mathematical description

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Findings

Conclusion