Lithium hlau phosphate roj teeb: tus yam ntxwv, daim ntawv thov

Niaj hnub nimno khoom txhua txhua hnub yog ua ntau thiab haib. High technology qauv ua siab xav tau mus rau lub roj teeb uas tam sim no yuav tsum muab kev kawm ntawv siab, lub zog efficiency, thiab muaj ib tug muaj zog mov ntawm hluav taws xob.

Cov kev taw qhia ntawm cov tshiab hom hluav taws xob cov khoom ntau lawm, cov acceleration ntawm tus txheej txheem - tag nrho cov no tsub kom hluav taws xob thov, thiab niaj hnub roj teeb yuav tsis yeej ib txwm ua raws li lawv. Yuav kom daws tau qhov teeb meem no, manufacturers tau xaiv los txhim kho lithium-ion technology. Yog li yug lub lithium hlau phosphate roj teeb (LiFePO4), uas yog ib tug ideological xeeb leej xeeb ntxwv ntawm Li-ion roj teeb.

keeb kwm ntaub ntawv

LiFePO4, los yog LFP, - tej yam ntuj tso mineral olivine tsev neeg, tau thawj sab nyob rau hauv 1996 los ntawm zaum los ntawm lub University of Texas, John Goodenough, uas twb nrhiav tau rau txoj kev mus txhim kho lub Li-ion hwj chim qhov chaw. Notable yog qhov tseeb hais tias lub mineral muaj ib tug tsawg dua toxicity thiab ib tug ntau dua thermal stability tshaj txhua yam paub thaum lub sij hawm lub electrodes.

Dhau li nws tau ntsib nyob rau hauv ib puag ncig ntuj, thiab muaj ib tug txo nqi. Lub ntsiab drawback ntawm lub electrodes rau lub hauv paus ntawm LiFePO4 yog ib tug me me hluav taws xob muaj peev xwm, uas yog vim li cas lithium hlau phosphate roj teeb tau ceased mus tau tsim.

Kev tshawb fawb nyob rau hauv no coj tau resumed nyob rau hauv 2003 nyob rau Massachusetts lub koom haum ntawm Technology. Ib pab neeg zaum ua hauj lwm rau lub creation ntawm fundamentally tshiab roj teeb uas yuav los ua ib tug kev hloov rau tus siab heev tshaj plaws nyob rau ntawm lub sij hawm, Li-ion roj teeb. Peb tes num xav nyob rau hauv loj tuam txhab uas muag xws li Motorola thiab Qualcomm tus, uas coj cov emergence ntawm roj teeb nrog LiFePO4 cathode ntsiab.

LiFePO4 roj teeb rau hauv lub hauv paus ntawm

Qhov no hom ntawm cov roj teeb siv tib yam technology los mus tsim hluav taws xob, thiab cov ib txwm lithium-ion hlwb rau peb. Txawm li cas los, muaj ib tug xov tooj ntawm qhov sib txawv nruab nrab ntawm lawv. Ua ntej, yog siv nws tus kheej hom BMS - tswj system uas tiv thaiv lub electric roj teeb los ntawm overcharging thiab sib sib zog nqus paug, pab txoj kev durability thiab ua rau lub zog qhov twg los ruaj khov.

Secondly, LiFePO4, tsis zoo li LiCoO2, yog tsawg lom. Qhov tseeb tso cai kom tsis txhob muaj ib co ntawm cov teeb meem txuam nrog tej kev ua qias tuaj. Nyob rau hauv kev los txo cov cobalt emissions vim kev pov tseg ntawm cov roj teeb.

Thaum kawg, vim yog lub tsis muaj unified qauv LFP ntsiab muaj ntau tshuaj compositions, uas ua rau variation Performance qauv tshaj ib tug ntau yam. Nyob rau hauv tas li ntawd, cov khoom siv fais fab txij nkawm yooj yim dua thiab yuav tsum tau ua nyob rau hauv kev ua raws cai nrog rau tej kev cai.

kev yam ntxwv

Nws yog hais tias lithium hlau phosphate roj teeb 48 volts, 36 volts thiab 60 volts yog ua los ntawm sequentially interconnecting ib hlwb, vim hais tias lub siab tshaj plaws voltage nyob rau hauv ib tug LFP-section tej zaum yuav tsis ntau tshaj 3,65 V. Yog li ntawd, qhov kev kawm ntawm txhua lub roj teeb yuav ho txawv los ntawm txhua lwm yam - nws tag nrho cov nyob rau lub rooj sib txoos thiab cov tshuaj nyob tus yeees.

Rau kev tsom xam Performance tuaj nominal tus nqi ntawm ib tug tib cell.

Qhov zoo tshaj plaws realization ntawm lub peev xwm rau txhua tus neeg ntawm tes rau hauv lub roj teeb muaj tau mus txog Everexceed. Lithium hlau phosphate roj teeb Everexceed txawv lub neej ntev ntev. Tag nrho lawv tau mas mus txog rau 4 txhiab. Charge-paug mus nrog ib tug tsis muaj peev xwm ntawm mus txog 20%, thiab cov replenishment ntawm lub zog cia yuav siv sij hawm qhov chaw nyob rau hauv 12 feeb. Muab no, peb yuav xaus uas Everexceed roj teeb yog ib tug ntawm qhov zoo tshaj plaws cov neeg sawv cev ntawm lub LFP-hais.

Zoo thiab tsis zoo

Lub ntsiab kom zoo dua ntawm uas nyob rau hauv ib cov paaj teeb tseem ceeb rau hauv lithium hlau phosphate roj teeb, cov lwm cov neeg sawv cev ntawm lub CRA, yog thiav. Xws li ib tug caij yog tau withstand ntau tshaj 3 txhiab xwb-paug mus rau ntawm ib lub hwj chim theem dauv mus rau 30%, thiab ntau tshaj 2 txhiab - .. Yog hais tias poob mus rau 20%. Vim hais tias ntawm no qhov nruab nrab roj teeb lub neej yog kwv yees li 7 xyoo.

Ruaj them tam sim no yog tus thib ob qho tseem ceeb kom zoo dua ntawm LFP-hais. Lub tso zis voltage tseem sib npaug zos rau 3.2 V kom txog thaum tus nqi yog kiag li sab sab. Qhov no simplifies lub xov, xa qhov yuav tsum tau rau voltage regulators.

Dua ncov tam sim no - lub feem peb ntawm lawv kom zoo dua. Qhov no feature tso cai rau lub roj teeb yuav muab lawv ntau zog txawm nyob rau hauv heev tsawg kub. Qhov no tej khoom vaj tse muaj sim hawm caij nyoog lub tsheb manufacturers siv lithium hlau phosphate roj teeb raws li cov thawj hwj chim qhov twg los thaum pib roj a thiab diesel xyaw.

Ua ke nrog rau tag nrho cov zoo, LiFePO4 roj teeb muaj ib tug loj drawback - ib tug loj loj thiab ntev. Qhov no txwv lawv siv nyob rau hauv tej yam hom machinery thiab hluav taws xob khoom.

Nta ntawm lub lag luam

Yog hais tias koj yuav npaj ua lithium-phosphate roj teeb, lub teeb meem nrog tus txij nkawm thiab cov lag luam koj yuav tsis muaj. Tag nrho ua tsaug rau lub fact tias cov manufacturers ntawm xws ntsiab yog tso rau hauv BMS board uas tiv thaiv overcharging thiab tiv thaiv kom txhob paug lub caij rau qhov qis tshaj theem.

Tab sis, yog hais tias koj yuav ib tug neeg hlwb (penlight roj teeb, piv txwv li), ces koj yuav tsum kom ib tug qhov muag rau roj teeb hwj chim ib leeg. Thaum them nyiaj dauv hauv qab no tseem ceeb heev theem (2.00 V hauv qab no) yuav sai poob thiab capacitance, ua rau nws tsis yooj yim sua rau recharge lub hlwb. Yog hais tias koj, on qhov tsis tooj, yuav overcharged (saum toj no 3,75 V), lub cell tsuas bulges vim lub gases tso.

Yog hais tias koj siv xws li ib tug roj teeb rau ib tug hluav taws xob lub tsheb, tom qab 100% them koj yuav tsum disconnect lub roj teeb charger. Txwv tsis pub, lub roj teeb swells vim supersaturation ntawm electrocution.

kev khiav hauj lwm cov kev cai

Yog hais tias koj npaj yuav siv ib tug lithium-phosphate roj teeb rau hauv cyclic hom thiab nyob rau hauv ib tug tsis, piv txwv li, raws li ib qhov chaw ntawm lub hwj chim-ups los yog nyob rau hauv nrog ib tug hnub ci roj teeb, koj yuav tau saib xyuas ntawm tej theem ntawm kev them nyiaj rau 3.40-3.45 V. paub daws ua hauj lwm no yuav pab 'ntse' chargers uas cia li thawj zaug siab txhawb rau mov ntawm lub zog, thiab ces txo txoj kev nyuaj siab lawm.

Thaum lub sij hawm kev lag luam, koj yuav tau saib xyuas qhov nqi koj tshuav ntawm lub hlwb los yog kev siv ntawm tshwj xeeb balancing kev them nyiaj (nyob rau hauv cov roj teeb, lawv yog ua rau ib tug hluav taws xob lub tsheb). cell tsis txaus hu ua xws li ib tug lub xeev, thaum tag nrho cov voltage ntawm tus dais no yog thaum ib tug me me npaum li, tab sis lub cell voltage yuav sib txawv.

Qhov no tshwm sim yog vim qhov sib txawv ntawm cov resistances ntawm ib tug neeg seem, tsis hu therebetween. Yog hais tias lub hlwb muaj ntau voltages, thiab nws yog lawv sis tsis ncaj xwb-paug, uas ho thiaj li cov kev pab cuam lub neej ntawm lub roj teeb.

Muab cov roj teeb rau hauv lub lag luam

Ua ntej siv lithium phosphate roj teeb tau koom ua ke los ntawm cais hlwb, kev kho mob yuav tsum tau coj ncaj system, raws li cov seem yuav muaj ntau them nyiaj theem. Rau lub hom phiaj no tag nrho cov Cheebtsam yog sib thooj, nyob rau hauv thaum uas tig mus thiab muaj kev cob cog rau lub rectifier, ib tug charger. United li nws yog tsim nyog los them lub cell rau 3.6 V.

Siv roj teeb lithium hlau phosphate rau hluav taws xob lub tsheb tuam, tej zaum koj pom tias nyob rau hauv thawj feeb ntawm roj teeb muab ntau zog thiab ces them nyiaj sai dauv rau 3.3-3.0 B. Tsis txhob ntshai ntawm no, vim hais tias nws yog ib lub lag luam ntawm lub roj teeb . Lub fact tias feem ntau ntawm nws cov peev xwm (txog 90%) cov lus dag nyob rau hauv no ntau yam.

xaus

Efficiency lithium-phosphate roj teeb yog 20-30% siab tshaj uas ntawm lwm yam roj teeb. Nyob rau tib lub sij hawm lawv pab rau 2-3 xyoo ntev tshaj li lwm yam hwj huam qhov chaw, raws li zoo raws li muab ib tug ruaj khov tam sim no tshaj rau tag nrho cov sij hawm zov me nyuam. Tag nrho cov no tseem ceeb rau hauv lub ntsiab nyob rau hauv ib cov paaj teeb.

Txawm li cas los, feem ntau cov neeg yuav las mees thiab lithium hlau phosphate roj teeb. Pros thiab cons ntawm roj teeb daj ua ntej lawv cov nqi - nws yog 5-6 lub sij hawm ntau tshaj li ib txwm rau peb kom peb ua-acid hlwb. Qhov no tsheb roj teeb nqi ib tug nruab nrab ntawm txog 26 txhiab. Rubles.