I. Udindo Waukulu wa Graphite Bipolar Plates mu Kukula kwa Makampani
Poganizira za zolinga za "dual carbon" komanso kukula kwachuma cha haidrojeni mwachangu, maselo amafuta (makamaka maselo amafuta a PEM) akusintha kuchoka pa gawo lowonetsera kupita ku ntchito yayikulu. Kuchokera pamagalimoto onyamula anthu kupita ku machitidwe opangira magetsi ogawidwa, magwiridwe antchito a makina, nthawi yogwira ntchito, komanso mtengo wa maselo amafuta akukhala zizindikiro zazikulu za mpikisano wamakampani.
Mu dongosololi, graphite bipolar plate si "gawo lothandizira" chabe, koma ndi chimodzi mwa zinthu zofunika kwambiri zomwe zimatsimikiza momwe mafuta amagwirira ntchito. Kafukufuku akusonyeza kuti ma bipolar plates amawerengera pafupifupi 60-80% ya kulemera ndi 40-50% ya mtengo wa mafuta; kapangidwe kake ndi kusankha zinthu zimakhudza mwachindunji kuchuluka kwa mphamvu ya makina, kulimba, ndi ndalama zopangira.
Kuchokera pakuwona momwe makina ogwirira ntchito amagwirira ntchito, ma graphite bipolar plates amakwaniritsa kukhazikika komanso kosalekeza kwa ma electrochemical a maselo amafuta mwa kuphatikiza ntchito zambiri - kuphatikiza "kuyendetsa kwamagetsi, kugawa kwa gasi, kasamalidwe ka kutentha, ndi chithandizo cha kapangidwe kake" - zomwe zimapangitsa kuti zikhale "gawo lenileni la ma coupling core" mkati mwa stack.
II. Udindo ndi Mfundo Zogwirira Ntchito za Graphite Bipolar Plates mu Ma Cell a Mafuta
Mu proton exchange membrane fuel cell (PEMFC) yachizolowezi, ma graphite bipolar plates amapezeka mbali zonse ziwiri za membrane electrode assembly (MEA), zomwe zimagwirizanitsa ntchito za ma cell a fuel cell olumikizidwa ndi mndandanda kudzera mu kapangidwe kake ka mbali ziwiri.
Mfundo yake yogwirira ntchito ingamvekedwe kudzera mu njira zinayi zotsatirazi:
Choyamba ndi njira yosonkhanitsira ndi kuperekera mphamvu zamagetsi. Pa nthawi ya reaction ya mafuta, haidrojeni imataya ma elekitironi pa anode, ndipo ma elekitironi amenewa amatulutsidwa ngati mphamvu kudzera mu dera lakunja. Bipolar plate ndi yomwe imayang'anira ma elekitironi kuchokera ku selo imodzi kupita ku ina. Kupereka mphamvu zamagetsi kwa graphite kumatha kufika pa 10⁴ S/cm, zomwe zimachepetsa kwambiri kutayika kwa ohmic ndikuwonjezera magwiridwe antchito a dongosolo.
Chachiwiri ndi njira yoyendetsera kayendedwe ka reactant ndi kayendedwe ka kayendedwe ka madzi. Malo ozungulira a bipolar plate amapangidwa ndi njira zolondola zoyendera kuti agawire haidrojeni ndi mpweya mofanana komanso kuchotsa madzi opangidwa ndi kayendedwe ka madzi. Njirayi kwenikweni ndi vuto lolamulira kayendedwe ka madzi ndi gasi, ndipo kapangidwe kake kamakhudza mwachindunji momwe mabatire amagwirira ntchito komanso kukhazikika kwa magwiridwe antchito a batri.
Chachitatu ndi njira yoyendetsera kutentha. Ma cell amafuta amapanga kutentha panthawi yogwira ntchito; ngati kutentha kumeneku sikungathe kuchotsedwa bwino, kumabweretsa malo otentha omwe ali pamalopo ndikufulumizitsa kukalamba kwa ma electrode a nembanemba. Kuyenda bwino kwa kutentha kwa Graphite kumalola kuti ifalitse kutentha mwachangu komanso mofanana mkati mwa ndege, potero kusunga malo otentha okhazikika mkati mwa muluwo.
Pomaliza, pali njira yotsekera ndi kulekanitsa zinthu. Kudzera mu kapangidwe kake komanso njira yotsekera yogwirizana, mbale ya bipolar imatsimikizira kulekanitsa kwa haidrojeni ndi mpweya, kuteteza kuipitsidwa kwa mpweya. Izi sizimangokhudza kugwira ntchito bwino komanso zimakhudza mwachindunji chitetezo cha makina.
Mwachidule, mfundo yogwiritsira ntchito ma graphite bipolar plates si njira imodzi yokha yogwirira ntchito, koma zotsatira za mgwirizano wa mgwirizano wa dongosolo lolumikizana la magawo ambiri lomwe limaphatikizapo zinthu zamagetsi, kutentha, kuyenda, ndi kapangidwe kake.
III. Chifukwa Chosankha Graphite: Kusanthula kwa Zinthu Zofunika Kwambiri
Graphite yakhala chinthu chogwiritsidwa ntchito kwambiri m'mbiri komanso masiku ano, chifukwa cha ubwino wake wonse paziyeso zambiri zofunika pakuchita bwino.
Ponena za mphamvu zamagetsi, graphite imawonetsa kuyendetsa bwino kwamagetsi; kapangidwe kake ka magawo kamapereka njira yopitilira yoyendera ma elekitironi, zomwe zimapangitsa kuti ikhale chinthu choyenera kukwaniritsa zofunikira zaukadaulo za DOE (kuyendetsa magetsi > 100 S/cm).
Ponena za kukhazikika kwa mankhwala, graphite imalimbana ndi dzimbiri kwambiri. Mu malo okhala ndi asidi komanso mphamvu zambiri za maselo amafuta, zinthu zachitsulo nthawi zambiri zimawononga ndikupanga zigawo zosasunthika, zomwe zimapangitsa kuti kukana kukhudzana kukhale kwakukulu. Mosiyana ndi zimenezi, graphite imakhala ndi kulephera kwa mankhwala, zomwe zimathandiza kuti ntchito ikhale yokhazikika kwa nthawi yayitali.
Ponena za mphamvu ya kutentha, graphite ili ndi mphamvu yotenthetsera kwambiri, yomwe imathandiza kukwaniritsa kufalikira kwa kutentha kofanana mkati mwa muluwo ndikuletsa kuwonongeka kwa electrode ya nembanemba chifukwa cha kutentha kwambiri komwe kumachitika pamalopo.
Kuphatikiza apo, graphite imapereka mphamvu zabwino kwambiri zotchingira mpweya (zomwe zimatha kuwonjezeredwa kudzera mu kulowetsedwa), kuteteza bwino kulowa kwa haidrojeni ndi mpweya ndikuwonetsetsa kuti dongosolo lonse ndi lolimba.
Komabe, malinga ndi ukadaulo, graphite ili ndi zofooka zazikulu. Mwachitsanzo, ndi yofooka kwambiri, yovuta kuikonza, ndipo nthawi zambiri imafuna makulidwe a mamilimita angapo (>2–5 mm), zomwe zimalepheretsa khama lopanga mapangidwe opepuka komanso amphamvu kwambiri. Chifukwa chake, njira zina zopangira graphite ndi zitsulo pang'onopang'ono zakhala cholinga chachikulu cha kafukufuku m'zaka zaposachedwa.
IV. Zochitika Zamakampani ndi Momwe Zikuonekera Patsogolo
Pamene malonda a maselo amafuta akuchulukirachulukira, ukadaulo wa bipolar plate ukusintha mwachangu, ndipo chitukuko chake chikuyendetsedwa bwino ndi kupita patsogolo kwa zipangizo komanso kupanga.
Kumbali imodzi, m'magalimoto okwera anthu komanso kugwiritsa ntchito mphamvu zambiri, makampaniwa akusintha pang'onopang'ono kuchoka pa mbale zachikhalidwe za graphite bipolar kupita ku mbale zachitsulo za bipolar (monga chitsulo chosapanga dzimbiri ndi titaniyamu). Zipangizozi zimatha kukhala ndi makulidwe a sub-millimeter, ndipo njira zopondera zimachepetsa kwambiri ndalama zopangira, motero zimakwaniritsa zofunikira pakupanga zinthu zambiri.
Kumbali inayi, ma graphite composite bipolar plates akubwera ngati njira yofunika kwambiri yosinthira. Mwa kuphatikiza ma conductive fillers monga ma resins ndi ma carbon nanotubes, zipangizozi zimatha kusunga conductivity yamagetsi komanso kukana dzimbiri pamene zikukweza mphamvu ya makina ndikuchepetsa ndalama zogwirira ntchito.
Nthawi yomweyo, ukadaulo wapamwamba wopanga zinthu (monga kupanga zowonjezera) ukuyendetsa kapangidwe ka njira zoyendera ma bipolar plate kuti zikhale zovuta komanso zogwira mtima kwambiri, motero kumawonjezera magwiridwe antchito onse komanso kugwiritsa ntchito mphamvu bwino kwa maselo amafuta.
M'kupita kwa nthawi, ma graphite bipolar plates adzakhalabe opikisana m'magawo otsatirawa:
● Makina opangira magetsi osasinthasintha (komwe mtengo ndi nthawi yogwira ntchito ndizofunikira kwambiri)
● Kugwiritsa ntchito mphamvu zochepa mpaka zapakati
● Machitidwe amagetsi a alkaline kapena momwe amagwirira ntchito
Monga wopanga komanso wogulitsa wamkulu waku Chinambale za graphite bipolar, Ningbo VET Energy yapanga ma graphite bipolar plates apamwamba a PEMFC omwe ndi otsika mtengo, opereka mphamvu zambiri, komanso olimba pamakina. VET Energy imaperekanso zipangizo za graphite zodzazidwa ndi utomoni kuti zikwaniritse kupirira kwa mpweya komanso mphamvu zambiri, pomwe zimasunga mphamvu zamagetsi ndi kutentha kwa graphite.
Chofunika kwambiri,Mphamvu ya VETimathandizira zofunikira pa kapangidwe ka graphite bipolar plate. Tikhoza kupanga makina mbali zonse ziwiri za plate kuti tipange njira zoyendera madzi, kupanga makina mbali imodzi yokha, kapena kupereka plate zopanda kanthu zopanda makina. Ma plate onse a graphite akhoza kukonzedwa malinga ndi zomwe mwafotokoza mwatsatanetsatane. Tikuyembekezera mafunso anu ena.
Nthawi yotumizira: Epulo-10-2026