Lead acid roj teeb, tseem hu ua lead-acid roj teeb, yog ib hom roj teeb uas muaj electrodes feem ntau yog ua los ntawm txhuas thiab electrolyte ua los ntawm sulfuric acid tov. Nws feem ntau muab faib ua ob hom: qhib hom roj teeb thiab valve tswj roj teeb. Cov qub yuav tsum tau ua kom cov kua qaub tsis tu ncua, thaum tom kawg yog lub roj teeb uas tsis muaj kev saib xyuas.
Cov roj teeb uas siv lead ua kua qaub yog hom thawj zaug ntawm cov roj teeb rechargeable tsim los ntawm Fab Kis tus kws kho mob Gaston Plante hauv xyoo 1859. Txawm hais tias nws muaj lub zog qis heev rau qhov hnyav piv thiab lub zog qis rau qhov sib piv, nws muaj peev xwm muab cov hluav taws xob muaj zog siab txhais tau hais tias lub roj teeb muaj lub zog tsawg. kuj loj zog rau qhov hnyav piv. Cov yam ntxwv no, nrog rau lawv cov nqi qis, ua rau lawv txaus siab rau kev siv hauv tsheb tsav los muab qhov siab tam sim no xav tau rau kev pib motors.
Txawm hais tias txhuas chemistry tau matured, nws tseem dav siv niaj hnub no. Muaj cov laj thawj txaus rau nws qhov chaw. Lead acid yog txhim khu kev qha thiab pheej yig raws li tus nqi ib watt. Yuav luag tsis muaj lwm lub roj teeb tuaj yeem muab lub zog siab zoo li pheej yig li txhuas-acid, ua rau nws raug nqi hauv tsheb, tsheb golf, forklifts, nkoj, thiab cov khoom siv hluav taws xob tsis cuam tshuam (UPS).
Cov qauv ntawm cov hlau lead-acid roj teeb yog ua los ntawm txhuas alloy. Cov hmoov lead ntshiab yog mos heev los txhawb nws tus kheej, yog li me me ntawm lwm cov hlau tau ntxiv kom tau txais cov cuab yeej siv zog thiab txhim kho hluav taws xob ua haujlwm. Cov additives feem ntau yog antimony, calcium, tin, thiab selenium. Cov roj teeb no feem ntau hu ua "lead antimony" thiab "lead calcium".
Ntxiv antimony thiab tin tuaj yeem txhim kho kev sib sib zog nqus, tab sis qhov no yuav ua rau kom cov dej haus thiab kev sib npaug. Calcium tuaj yeem txo qhov tso tawm ntawm tus kheej, tab sis cov hlau lead calcium tuaj yeem muaj kev cuam tshuam loj hlob vim yog lub qhov rooj oxidation thaum lub sij hawm overcharge. Cov roj teeb txhuas-acid niaj hnub tseem siv cov tshuaj doping xws li selenium, cadmium, tin, thiab arsenic kom txo tau cov ntsiab lus antimony thiab calcium.
Thaum lub sij hawm sib sib zog nqus cycling, lead-acid hnyav dua nickel thiab lithium-based systems thiab muaj kev ua haujlwm tsis zoo. Kev tso tawm ua kom tiav ua rau muaj kev nyuaj siab, thiab txhua qhov kev tso tawm / kev them nqi mus tas li deprives lub roj teeb ntawm tus nqi me me. Thaum lub roj teeb ua haujlwm zoo, qhov poob qis tsawg, tab sis thaum qhov kev ua tau zoo poob mus rau ib nrab ntawm lub peev xwm nominal, fading yuav nce. Cov yam ntxwv hnav no siv tau rau txhua lub roj teeb rau qhov sib txawv.
Raws li qhov tso tawm qhov tob, txhuas-acid siv rau kev siv lub voj voog sib sib zog nqus tuaj yeem muab 200 mus rau 300 tawm / them lub voj voog. Cov laj thawj tseem ceeb rau nws lub neej luv luv yog lub rooj vag corrosion ntawm qhov zoo electrode, depletion ntawm cov khoom siv, thiab nthuav dav ntawm cov phaj zoo electrode. Ntawm qhov kub thiab txias ntawm kev khiav hauj lwm siab dua thiab thaum nqus cov pa tawm siab, qhov tshwm sim kev laus no yuav nrawm dua.
Kev them cov roj ntsha lead-acid yog qhov yooj yim, tab sis qhov tseeb voltage txwv yuav tsum tau ua raws. Xaiv qhov kev txwv tsis pub muaj hluav taws xob tuaj yeem npog lub roj teeb, tab sis nws tuaj yeem ua rau kev ua haujlwm tsis zoo thiab sib sau ntawm sulfate ntawm lub phaj tsis zoo electrode. Kev txwv tsis pub muaj hluav taws xob siab tuaj yeem txhim kho kev ua tau zoo, tab sis nws yuav tsim lub rooj vag corrosion ntawm lub phaj zoo electrode. Yog tias kho raws sijhawm, sulfation tuaj yeem thim rov qab, tab sis corrosion yog ruaj khov.
Lead acid tsis tuaj yeem them sai sai, thiab rau ntau hom, nws yuav siv sij hawm 14 mus rau 16 teev kom them tag nrho. Lub roj teeb yuav tsum tau them tag nrho. Lub roj teeb qis tuaj yeem ua rau sulfation, uas tuaj yeem ua rau kev ua haujlwm ntawm lub roj teeb puas. Ntxiv cov pa roj carbon monoxide rau qhov tsis zoo electrode tuaj yeem txo qhov teeb meem no, tab sis nws tseem tuaj yeem txo cov zog tshwj xeeb.
