Lithium ion roj teeb project tom qab

  Lithium-ion battery is an indispensable energy storage product that drives human modern life, Lithium ion batteries are indispensable for daily communication, energy storage, household appliances, electric vehicles, electric ships, etc. And in special applications such as military, deep sea, and mining, lithium-ion batteries are characterized by their high energy density, long service life, and superior safety performance, Widely replaced the traditional lead-acid batteries, nickel-metal hydride batteries and other previous generation products.

Cov roj teeb lithium-ion yog kev lag luam siv thev naus laus zis, kev txhim kho ntawm kev lag luam no tseem tuaj yeem ua rau muaj kev loj hlob ntawm lub teb chaws cov cuab yeej tsim khoom thiab cov khoom lag luam. Advanced membrane technology, tsis siv neeg sib dhos kab tshuab, tsis tshua muaj dew point thiab siab huv si huab cua tshuab thiab cov khoom siv siv nyob rau hauv cov txheej txheem tseem ceeb ntawm lithium ion roj teeb raug, Nws muaj ib tug zoo kev taw qhia thiab ua qauv qhia lub luag hauj lwm rau txoj kev loj hlob ntawm lwm yam kev lag luam technologies thiab khoom siv. Cov khoom siv hauv cov roj teeb lithium-ion tuaj yeem ua ke nrog cov tooj liab hauv zos, cobalt ore thiab graphite ore rau kev sib sib zog nqus rau hauv ultra-thin tooj liab ntawv ci rau lithium-ion roj teeb, lithium cobaltate (lithium nickel cobalt manganate) cathode cov ntaub ntawv, thiab high- zog graphite anode cov ntaub ntawv.

Txawm hais tias cov roj teeb lithium-ion tam sim no yog hom roj teeb uas nrov tshaj plaws, nrog rau kev txhim kho thev naus laus zis, muaj ntau hom roj teeb lithium-ion, txhua tus muaj nws qhov zoo thiab qhov tsis zoo. Txawm li cas los xij, tag nrho, lithium-ion roj teeb muaj qhov zoo thiab qhov tsis zoo hauv qab no:

1. Qhov zoo ntawm lithium-ion roj teeb.

(1) High voltage: Lub zog ua haujlwm ntawm ib lub roj teeb tuaj yeem ncav cuag siab li 3.7-3.8V (qhov siab tshaj plaws ntawm tes tuaj yeem them txog 4.2V), uas yog peb npaug ntawm Ni Cd thiab Ni-H roj teeb.

(2) Lub zog tshwj xeeb: Tam sim no, lub zog tshwj xeeb uas tuaj yeem ua tiav yog li 555Wh / kg, uas txhais tau hais tias cov khoom tuaj yeem ncav cuag lub peev xwm tshwj xeeb ntawm ntau dua 150mAh / g (3-4 zaug Ni Cd, 2-3). lub sij hawm Ni MH), uas yog ze li ntawm 88% ntawm nws cov nqi theoretical.

(3) Lub neej voj voog ntev: feem ntau tuaj yeem ncav cuag ntau dua 500 zaug, lossis ntau dua 1000 zaug, thiab lithium hlau phosphate tuaj yeem ncav cuag ntau dua 2000 zaug. Lub neej ntev ntawm cov roj teeb hauv cov khoom siv hluav taws xob qis tam sim no yuav ua ob npaug rau lawv qhov kev sib tw.

(4) Kev nyab xeeb zoo: tsis muaj kuab paug, tsis muaj kev nco. Raws li cov thawj coj ntawm Li-ion, lithium-ion roj teeb tau txo lawv qhov chaw thov vim qhov tsim ntawm dendrites thiab luv circuits los ntawm cov hlau lithium. Li-ion tsis muaj cov khoom ua paug rau ib puag ncig xws li cadmium, txhuas, thiab mercury. Ib qho teeb meem loj ntawm qee cov roj teeb Ni Cd hauv qee cov txheej txheem (xws li sintering) yog "nco nyhuv", uas txwv tsis pub siv roj teeb. Txawm li cas los xij, Li-ion tsis muaj qhov teeb meem no kiag li.

(5) Tsawg tus kheej tawm: Tus kheej tawm tus nqi ntawm Li ion, uas tau them tag nrho ntawm chav tsev kub thiab khaws cia rau ib hlis, yog li 2%, qis dua 25-30% Ni Cd thiab 30-35% Ni thiab MH.

(6) Kev them nyiaj sai thiab tso tawm: Lub peev xwm tuaj yeem ncav cuag ntau dua 80% ntawm lub peev xwm nominal tom qab 30 feeb ntawm kev them nyiaj, thiab tam sim no phosphate hlau roj teeb tuaj yeem ncav cuag 90% ntawm lub peev xwm nominal tom qab 10 feeb ntawm kev them nyiaj.

(7) High working temperature range: The working temperature is -25~55 ° C. With the improvement of the electrolyte and positive electrode, it is expected to expand to -40~70 ° C.

2. Disadvantages ntawm lithium-ion roj teeb

(1) Kev laus: Tsis zoo li lwm cov roj teeb uas siv tau, lub peev xwm ntawm lithium-ion roj teeb yuav maj mam poob qis, ywj siab ntawm tus naj npawb ntawm kev siv, tab sis cuam tshuam rau qhov kub thiab txias. Cov txheej txheem ua tau yog tias qhov kev tiv thaiv sab hauv maj mam nce, yog li nws yuav muaj feem cuam tshuam rau hauv cov khoom siv hluav taws xob nrog kev ua haujlwm siab. Hloov graphite nrog lithium titanate zoo li yuav ncua lub neej.

(2) Tsis muaj peev xwm dais overcharging: Thaum lub sij hawm overcharging, cov lithium ions ntau dhau lawm yuav kho nyob rau hauv lub lattice mus tas li thiab tsis tuaj yeem tso tawm, uas tuaj yeem ua rau lub neej luv luv thiab roj ntau lawm ua rau cov pa npuas.

(3) Tsis muaj peev xwm tiv taus tshaj tawm: Thaum lub sij hawm tso tawm ntau dhau, cov lithium ions ntau dhau raug tshem tawm ntawm lub tshuab hluav taws xob, uas tuaj yeem ua rau cov lattice vau, ua rau lub neej luv, thiab ua rau muaj roj, ua rau muaj roj npuas.

(4) Ntau yam kev tiv thaiv yuav tsum tau ua: Vim qhov tseeb tias kev siv tsis raug tuaj yeem txo txoj sia thiab txawm tias ua rau tawg, ntau yam kev tiv thaiv tau raug ntxiv rau qhov tsim ntawm lithium-ion roj teeb.

Kev tiv thaiv Circuit Court: tiv thaiv overcharge, tshaj tawm, overload, thiab overheating.

Exhaust chaw nres nkoj: txhawm rau tiv thaiv kev kub siab hauv lub roj teeb.

Cov yam ntxwv ntawm Diaphragm: Nws muaj qhov ua haujlwm siab tiv thaiv kom tsis txhob muaj cov kab hluav taws xob sab hauv; Thaum qhov kub ntawm lub roj teeb siab dhau lawm, nws tseem tuaj yeem yaj, tiv thaiv lithium ions los ntawm kev hla, thaiv cov roj teeb, thiab ua kom muaj zog sab hauv (txog 2kQ).

Hauv cov ntsiab lus, txoj kev loj hlob ntawm lithium-ion roj teeb kev lag luam yog ib qho kev lag luam muaj zog uas txhawb nqa cov teb chaws tsim kho rau cov teb chaws loj heev.