Laser vuam: cov txheej txheem siab teeb meem, cov roj teeb tshiab xws li lub tog raj kheej loj rub cov vuam ntim rau sab saud
Laser thev naus laus zis yog siv rau hauv kev txiav, tu, vuam thiab coding ntawm lithium roj teeb vim nws cov kev ua haujlwm siab, yoog raws, kev ntseeg tau thiab ruaj khov, tsis tshua muaj vuam cov khoom, siab automation thiab kev nyab xeeb. Tsav los ntawm kev txhawb nqa muaj zog ntawm lub teb chaws txoj cai thiab kev nce qib thiab kev siv lub zog tshiab tsheb, qhov kev thov rau lub tsheb fais fab roj teeb hauv Suav teb tau loj hlob ntau. Nyob rau hauv peb lub hauv paus tseem ceeb ntawm lub zog tshiab tsheb roj teeb, lub cev muaj zog, kev tswj hluav taws xob, lub zog tseem ceeb ntawm cov roj teeb lithium roj teeb hauv tus nqi ntawm lub tsheb suav nrog kev faib ua feem ntau, tab sis kuj ncaj qha txiav txim siab qhov ntau ntawm lub tsheb. Kev tsim cov roj teeb lithium yog tsim los ntawm cov txheej txheem, uas tau muab faib ua peb qhov tseem ceeb: kev tsim cov khoom siv hluav taws xob, kev tsim cov hlwb thiab kev sib dhos ntawm cov roj teeb. Qhov zoo ntawm lithium roj teeb ncaj qha txiav txim siab qhov kev ua tau zoo ntawm lub zog tshiab lub tsheb thiab yog li ntawd yuav tsum tau muaj qhov siab tshaj plaws hauv nws cov txheej txheem tsim khoom. Laser thev naus laus zis, raws li cov cuab yeej tsim khoom "lub teeb", yog siv rau hauv kev txiav, tu, vuam thiab coding txheej txheem ntawm lithium roj teeb, vim nws cov kev ua haujlwm siab thiab precision, yooj, kev ntseeg tau thiab ruaj khov, tsis tshua muaj vuam khoom, automation. thiab kev nyab xeeb.
2. Laser vuam: cov txheej txheem siab teeb meem, cov roj teeb tshiab xws li lub tog raj kheej loj rub cov vuam ntim rau sab saud
2.1 Lub hauv paus ntsiab lus: Los lav qhov kev nyab xeeb ntawm lub roj teeb, qhov vuam zoo nyob ntawm lub zog laser tswj thiab cov txheej txheem tsis ua haujlwm.
Laser vuam muaj ntau yam zoo xws li kev sib sib zog nqus melting, kev kub ceev thiab tsis tshua muaj distortion, uas tuaj yeem txhim kho kev nyab xeeb ntawm cov roj teeb fais fab. Raws li niaj hnub vuam tshuab, laser vuam muaj qhov zoo ntawm qhov sib sib zog nqus melting, kev kub ceev, tsis tshua muaj deformation, tsis tshua muaj kev xav tau rau qhov chaw vuam, siab zog ceev, tsis cuam tshuam los ntawm magnetic teb, tsis txwv rau cov khoom siv hluav taws xob, tsis tas yuav tsum muaj lub tshuab nqus tsev ua haujlwm. thiab tsis tsim X-rays thaum lub sij hawm vuam txheej txheem, thiab lwm yam. Nws yog dav siv nyob rau hauv lub teb ntawm high-end precision manufacturing, tshwj xeeb tshaj yog nyob rau hauv lub tshiab lub zog tsheb thiab lub hwj chim roj teeb industries. Lub hwj chim roj teeb vuam qhov chaw muaj ntau heev, nyuaj thiab xav tau siab precision. Cov tuam txhab roj teeb hluav taws xob kuj tseem muaj cov kev xav tau siab rau lub tshuab hluav taws xob, kev nyab xeeb, kev ua tau zoo thiab kev ua haujlwm ntawm cov khoom siv roj teeb. Qhov tshwj xeeb zoo ntawm laser vuam tshuab tuaj yeem txhim kho kev nyab xeeb, kev ntseeg tau thiab sib xws ntawm cov roj teeb, txo cov nqi thiab txuas ntxiv kev pab cuam lub neej, ua rau nws qhov kev xaiv zoo tshaj plaws rau cov tuam txhab roj teeb hluav taws xob.
Lub ntsiab tseem ceeb uas txiav txim siab qhov zoo ntawm laser vuam yog laser zog tswj thiab vuam txheej txheem technology. Laser zog tswj: ①Raws li cov khoom yuav tsum tau welded muaj cov nqi sib txawv rau txawv wavelengths ntawm lub teeb laser (uas tuaj yeem sib txawv ntawm 5 feem pua rau 50 feem pua), qhov kev xaiv ntawm lub laser tuaj yeem ua rau txhua qhov sib txawv. Yuav kom xa ib lub teeb thiab ruaj khov welding laser beam mus rau welded ib feem, lub laser tso zis hwj chim yuav tsum tau zoo ib yam los yog precisely tswj. Lub zog qis dhau yuav ua rau cov vuam tsis txaus thiab cuam tshuam rau vuam zoo, lub zog siab dhau los yog nce thiab nqis hloov pauv yuav ua rau tawg, porosity thiab lwm yam tsis zoo. Yog li ntawd, kev tswj ntawm lub laser qhov chaw ua ib qho tseem ceeb tshaj plaws technologies rau laser vuam.
② Lub laser vuam nyhuv yog complex, muaj feem xyuam rau ntau yam xws li laser wavelength, lub zog ceev, vuam lub sij hawm, vuam lub taub hau lub kaum sab xis, focal nrug, laser nqus tus nqi thiab huv si ntawm vuam, thickness thiab thermal conductivity ntawm lub vuam, hom thiab ntws. ntawm shielding gas. Yog li ntawd, laser welding tshuab kuj yog ib qho ntawm cov tseem ceeb tshaj plaws uas cuam tshuam rau qhov zoo ntawm vuam, yuav tsum tau laser vuam txheej txheem cov kws kho mob mus tas li tshawb nrhiav cov ntsiab lus, tsuas yog ib lub sij hawm ntev ntawm kev sim tsub kom tau zoo welding.
Raws li txoj cai kev ua haujlwm vuam tuaj yeem muab faib ua tsib hom, nyob ntawm qhov yuav tsum tau ua ntawm daim ntawv thov sib txawv vuam txoj kev raug xaiv kom ua tiav cov txiaj ntsig zoo tshaj plaws. Nyob ntawm lub hauv paus ntsiab lus ntawm kev ua haujlwm, laser vuam tuaj yeem muab faib ua tsib pawg: kev siv hluav taws xob kub, sib sib zog nqus vuam, sib txuas vuam, laser brazing thiab laser conduction vuam. Nyob ntawm tus neeg siv khoom thiab daim ntawv thov ua tiav, txoj kev vuam tsim nyog raug xaiv kom ua tiav cov txiaj ntsig zoo tshaj plaws.
2.2 Daim ntawv thov txheej xwm: core manufacturing, PACK vuam tsim nyog txog 10-30 lab / GWh
Laser vuam yog siv nyob rau hauv zus tau tej cov hwj chim hlwb nyob rau hauv lub cell manufacturing txheej txheem thiab nyob rau hauv lub roj teeb PACK txheej txheem. Hauv kev tsim cov hluav taws xob hluav taws xob, cov ntu tseem ceeb uas siv laser vuam muaj xws li: ①Mid-txheej txheem: vuam ntawm lugs (xws li ua ntej vuam), qhov chaw vuam ntawm ncej strips, pre-welding ntawm cores rau hauv lub plhaub, sealing vuam ntawm sab saum toj. npog ntawm lub plhaub sab nrauv, sealing vuam ntawm cov kua tshuaj txhaj tshuaj chaw nres nkoj, thiab lwm yam. ②Post-txheej txheem: suav nrog cov vuam ntawm cov khoom sib txuas hauv lub roj teeb PACK module thiab vuam ntawm qhov tawg-pov thawj valve ntawm lub hau tom qab module, thiab lwm yam. Tus nqi pre-welding ntim yog kwv yees li 10-30 lab Yuan / GWh. Laser vuam khoom nyob rau hauv lub hwj chim roj teeb manufacturers los nqis peev nyob rau hauv kwv yees li ntawm 5-15 feem pua, raws li lub hwj chim roj teeb ib GWh cov cuab yeej peev ntawm kwv yees li 200 lab yuan, tam sim no lub hwj chim roj teeb laser welding khoom ib leeg GWh peev nyob rau hauv 10 lab yuan rau 30 lab yuan.
2.3 Kev Xav Tau: Cov chaw tsim khoom lag luam semiconductor nthuav dav kev siv nyiaj thaum lub ntiaj teb "cov tub ntxhais tsis txaus", cov khoom lag luam nce ntxiv
4680 Cov thooj voos kheej kheej loj muaj cov kev xav tau siab dua rau cov txheej txheem laser, thiab cov vuam ntim yuav tsum nce siab piv rau cov square cells thiab cov thooj voos kheej kheej me. Lub 4680 ntawm tes yuav tsum muaj cov txheej txheem laser xav tau ntau dua thiab cov duab tsis zoo ntawm cov lugs yog cov txheej txheem nyuaj. Lub roj teeb 4680 siv cov txheej txheem tag nrho, rhuav tshem cov pwm ntawm cov roj teeb ib txwm muaj nrog ib qho zoo thiab ib qho tsis zoo, uas ua rau luv luv Circuit Court, thiab yog tsim los nrog ob ntu kaw, uas yog ib qho teeb meem loj rau electrolyte nkag, thiab cov ntau lub lugs yog ib qho nyuaj rau fold zoo zoo thiab yuav tsum tau ib tug ntau dua laser txheej txheem. 4680 Laser vuam ntawm loj cylindrical hlwb tau nce nyob rau hauv cov nqe lus ntawm vuam txheej txheem thiab yuav tsum tau vuam cov cuab yeej piv rau cov square cells thiab me cylindrical hlwb raws li. Piv nrog rau cov square hlwb, cov txheej txheem laser vuam rau tag nrho cov lug ntawm lub tog raj kheej loj yog nce los ntawm 5 mus rau 7 kis. Hais txog cov cylindrical me me, ib kab GWh ib leeg muaj 5 lub tshuab vuam ntxiv piv rau 18650 thiab 21700 kab ntawm tes. Ua ke nrog cov saum toj no, peb ntseeg hais tias qhov kev thov rau laser vuam ntawm 4680 lub tog raj kheej loj yuav tsum loj hlob piv rau cov square cells thiab lub tog raj kheej me me.
Lwm yam vuam txuas tshuab: txhawm rau daws qhov teeb meem ntawm qhov sib txawv ntawm cov hlau vuam, xws li roj teeb PACK hauv lub busbar vuam yuav tsum tau hloov los ntawm laser vuam, peb txiav txim siab tias, raws li cov txheej txheem laser vuam txuas ntxiv mus, laser vuam nkag mus tau zoo. txav mus los. Ib qho piv txwv yog Al / Cu heterogeneous hlau soldering ntawm busbars nyob rau hauv square cell back-end modules / PACKs. ① Lub teeb tsis pom kev ntawm Al thiab Cu thiab nyiam tsim cov hlau sib txuas ua ke yog Al / Cu nyuaj: laser vuam ntawm Al / Cu sib txawv ntawm cov hlau muaj ntau qhov nyuaj vim yog cov khoom sib txawv ntawm lub cev ntawm Al thiab Cu. Ib qho ntawm cov kev sib tw tseem ceeb yog qhov nqus qis ntawm Al ntawm lub laser wavelength ntawm 1um thiab txawm tias qis dua ntawm Cu; Lwm qhov yog cov khoom siv metallurgical ntawm Al-Cu alloy, piv txwv li cov hlau nplaum heev tuaj yeem ua rau tawg tsim. Cov theem intermetallic nrog Cu cov ntsiab lus ntawm 50-80 feem pua yuav raug tsim.
Busbar welding tseem tsis yog ib qho kev daws teeb meem ntawm nkig tebchaw, tab sis laser welding yog qhov yuav tshwm sim. Vim qhov yooj yim tsim ntawm nkig sib txuas ntawm tooj liab thiab txhuas tom qab laser vuam, uas tsis tuaj yeem ua tau raws li qhov yuav tsum tau siv, feem ntau yog siv ultrasonic vuam sab nraud, tooj liab thiab tooj liab, txhuas thiab txhuas feem ntau yog siv rau laser vuam. Nyob rau tib lub sij hawm, lub siab kub hloov pauv ntawm tooj liab thiab txhuas, lub siab reflectivity ntawm lub laser thiab lub thickness kuj loj ntawm cov khoom sib koom yuav tsum muaj lub zog siab laser kom ua tiav cov vuam. Los ntawm cuaj qhov sib txawv thiab cov txheej txheem ntawm kev hloov kho cov kev sim, ntawm xya muaj qhov sib txawv, peb ntseeg tias, nrog rau kev nce qib ntawm cov txheej txheem laser yav tom ntej, cov teeb meem ntawm Al / Cu laser vuam ntawm busbars yuav tsum tau daws, thiab laser welding yog qhov yuav tshwm sim tshaj plaws.
