Vim li cas cov hluav taws xob tshiab siv 18650 roj teeb
18650 roj teeb yog thaum ntxov, paub tab thiab ruaj khov lithium{1}}ion roj teeb, uas yog siv dav hauv cov khoom siv hluav taws xob. Tau ntau xyoo, cov tuam txhab Nyij Pooj tau sau ntau yam kev paub dhau los hauv cov txheej txheem tsim 18650 roj teeb, kom qhov sib xws thiab kev nyab xeeb ntawm 18650 roj teeb tsim tau mus txog qib siab.
Hauv qhov sib piv, cascading lithium- ion roj teeb nyob deb ntawm kev paub tab, cov roj teeb square, cov roj teeb muag muag, txawm tias qhov loj me, qhov loj me, thiab txoj hauj lwm ntawm cov tabs tsis sib xws, cov txheej txheem ntawm cov roj teeb manufacturers tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua. tej yam kev mob, thiab feem ntau ntawm kev tuav tswj, Lub roj teeb sib xws yog tias lub roj teeb tsis yog nyob rau theem ntawm 18650. Kev tswj cov xov tooj ntawm cov xov tooj ntau hauv cov koob thiab cov kab sib txuas yuav tsis tso cai rau txhua lub xov tooj ntawm tes ua haujlwm zoo dua yog tias qhov sib xws ntawm cov hlwb yog. tsis mus txog par, thiab 18650 cell tuaj yeem daws qhov teeb meem no.
To sum up, the 18650 battery has a small capacity and a large number of cells (7104 for the S type), but the consistency is good. Cascade cells can be increased (20ah 60ah), and the number of cells can be decreased, but the consistency is poor. In contrast, it is very difficult to invest a lot of manpower and material resources with battery suppliers to improve the production process of cascaded batteries. So when it comes to developing the Roadster and Model S, Tesla's only option is to buy batteries from the market and develop its own battery system. The technical challenge of developing a battery system that manages more than 6,000 units with good consistency should be less than that of more than 200 units with poor consistency. Even if the number of individual batteries increases, it will be easier to manage if they perform reliably.
