Most of China’scoalproductioncompanieshaveusedlead-acidbatteriesas a miner’s lamppower supply,in the long-termuseofthiskind of Miner’s lamp, ithassignificantdeficiencies:
(1)largelampsize, heavy weight, will increase the burden on undergroundworkers;
(2)lampin the useandmaintenanceofleak–prone,internalcorrosion will causespillsand personalinjuryaccidents;
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(3)extensiveuse of leadandantimonyinlead-acidbatteries,heavy metals,causingseriouspollutionto theenvironment,at present the European Unionand the United Stateshasrestrictedtheproduction of lead-acidbatteries;
(4) the shortcyclelife, makes the storage and maintenance more complex.
In recent years,muchnewpoweremerging,nickel-hydrogenbatteries,lithium-ion battery Packhas beenused in a variety ofportableconsumerelectronics,with the developmentoflithium-ionbatterytechnology,theapplicationfield of lithium-ionbatteriesfromphones,MP3,Bluetoothheadsetsand othersmallpowerextendstopowertools,electricbicycle,HEV/EV power supply, such aslargepowersystems.Lithium-ionbatteryin the aboveapplicationareasshowshighenergy density,longcycle lifecharacteristics,powerlead-acid,nickel-hydrogenbatteryperformancehasgreatlyimproved.
Lithium-ionbatteriesare widely used inminer’s lamp
Based on the foregoinganalysis,believe thatlithium-ionbatteriesusedinminer’s lampareasshouldpay attention to the followingaspects:
Miner’s lampfromlithium-ionbatteriesinaccidentanalysisfoundthatmost of the batteryandternarymaterialascathodematerial for lithiumcobalt oxide.Thesetwomaterialsin the lowercapacitycell phonebatterycanmeetsafetyrequirements, buteasy
The increasemightnot be able to meet the stringentsafetyrequirements.Inhigh-risk areasshould be the caseat presenthigh-securityperformance,the strongthermalstabilityoflithiumironphosphatematerial.
(2)choose a reasonablestructuredesignandproductiontechnology
Currentlithium-ionbatterysafetyincidentsisanimportantcauseofinternalshort circuitof the batterythermalrunaway,internalshort circuitusuallyconsists of particlesin the filmproduction,poorratio of positive and negative,adversefactorssuch asproductionprocesscontrol.Thereforeneededinstructuraldesignofcelltocell groupstructure,lugleadsway into fullconsideration,reducedrisk of internalshort circuitand. Lithium ion battery in load electric State Xia, from cathode material in the off embedded out of lithium ion embedded to negative material in the and negative of carbon material combined into lithium carbon compounds, the compounds reaction activity is high, dang battery by extrusion, and acupuncture or appeared internal short-circuit Shi, plus or minus very occurred contact, due to plus or minus very material pressure poor high,
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plus or minus very contact will quickly reaction and released large of heat, caused battery hot runaway even fire, and explosion, extreme situation appeared. How toimprovingthethermalstability of cathodematerials to improve the safetyoflithium-ionbatteries, akeyusedat the cathodesurfacecoated with heat-resistantmaterial,anodesurfacecoatingtreatmentcanimprovethestability of cathode,reducingnegativecontactareatoreduce the heatgeneration,batteryheatcontrolwithin a certainrange.
(3)optimizing the overallpowerstructuredesignandprotectingcircuitboarddesign of Miner’s lampusing the environmentthan the averagepowerusageenvironment is morecomplex,extreme,long-termworkingunderhigh temperature and highhumidity,andissubject to strongshock,drop,may,thereforehighdemandson the powerstructure.Structuresealingstrong,waterproof,dust-proof,shellmaterials of the highmelting point,highthermalstability, and overallstructure is solid and reliablepower,increase the bufferbetween the coreandshell,increase the impactresistanceof the power supplyandfallingcapacity.Theinternalbatteryand the protectioncircuitcanbeeffectiveprotectionof the shell,useenvironmentavoidingdamageto thebatteries.
Due to the characteristics of the lithium-ionbatteryitself,itsoverchargeandshort circuitsituationsprone to thermalrunaway,soprotectioncircuitsfor the miner’s lampbatterysafety–critical,currentlithiumbatteries
Manufacturers attach greatimportance to the protection of circuitboarddesign and development. Due to li ion battery pack itself work voltage platform high, Miner’s lamp with lithium ion battery without more section battery series using, so protection circuit relative Yu electric tool or electric bike simplified many, coupled with phone battery protection circuit technology after years of development has very mature, so miner’s lamp with lithium ion battery protection circuit design Shang more need note of is electronic components of reliability filter and the circuit board detection, ensure each miner’s lamp power equipped with of protection circuit board performance stable reliable. Protectioncircuitboarddesignandtestpowerenvironment you need to take fullaccount of Miner’s lamp, withincreasedreliabilitytest underhigh temperature and highhumidityconditions.
From the analysis, we cansee that,althoughtheapplicationfieldoflithium-ionbatteriesin the miner’s lamppower is stillin the initialstage,exposed a number of problems.Butfrom the perspective of overalldevelopment of Miner’s lamp,lithium-ionbatteriesbecause of itshighenergy density,longcyclelifewill bemarked by a new generationofthepreferredpower supply for the lamp.Inthelithium-ionbattery manufacturersattentionandeffort,withall kinds ofsecurityproblemssolved,lithium-ionbatteriesinminer’s lamppowerismore and morewidelyused in the field.