Ingabe amabhethri e-LiPo aphephile emalebhu e-robotics ezikoleni?
Amabhethri e-LiPo aphephile ezikoleni kuphela uma elawulwa ngemithetho eqinile yokushaja neyokugcina. Nakhu ukuthi ungawaphatha, uwagcine, futhi uwakhiphe kanjani ngokuphepha ekilasini.
Amabhethri e-lithium polymer (LiPo) aphephile ukuwasebenzisa elebhu ye-robotics yesikole, kodwa kuphela uma kunemigomo eqinile yokusebenza. Uma eshiywa emikhubeni yabafundi engagadiwe, ayingozi enkulu kunazo zonke yomlilo ekilasini lakho. Uma ilebhu yakho yakha ama-drone ngokwezifiso noma eminye imisebenzi yokwakha edinga ugesi omningi, ngeke ukwazi ukuwagwema kalula—isilinganiso samandla nesisindo kanye namazinga okukhipha amandla awafinyelelwa ngamanye. Izinhlelo zemincintiswano zivamise ukuwavimba ngokuphelele: isibonelo, irobhothi le-FIRST Tech Challenge kumele lisebenzise iphakethe elilodwa nje eligunyaziwe le-12V NiMH elisohlwini olusemthethweni u-R601, futhi i-LiPo akulona ithuluzi elisemthethweni lokushintsha. Kodwa-ke, uma ikharikhulamu yakho idinga kuphela imisebenzi yama-microcontroller esebenzisa ugesi omncane, kufanele uwagweme ngokuphelele ama-LiPo bese usebenzisa amaphakethe e-NiMH, amaseli e-LiFePO4, noma ama-power bank e-USB avamile.
Uma kumele usebenzise ama-LiPo, ukuphepha akuxhomekile ekutheni abafundi bazibambe kahle yini; kuyinkinga yobunjiniyela neyemigomo yokusebenza. Ngezansi kuchazwa ukuthi ama-LiPo ehluleka kanjani nokuthi kungani ehluleka ezimeni zesikole, kanye nendlela yokuwalungisela edingekayo ukuze uwalawule ngokuphepha.
Kungani ama-LiPo Ehluleka Ekilasini
Iseli le-LiPo lisebenza phakathi kuka-3.0V (liphelelwe amandla ngokuphelele) no-4.2V (ligcwele ngokuphelele), linevolthi eyisisekelo engu-3.7V eselini ngalinye. Amakhemikhali ayaguquka ngokushesha ngoba i-electrolyte ivalelwe kwijeli ye-polymer evutha kalula, ifakwe esikhwameni sefoyili elithambile esikhundleni sesilinda sensimbi eqinile.
Elebhu yesikole, izindlela ezine ezithile zokwehluleka zibangela ukuthi amaphakethe akhukhumale, akhiphe igesi elinoshevu, noma angene ekushiseni okungalawuleki:
- Ukukhipha amandla ngokweqile ngaphansi kuka-3.0V eselini ngalinye: Abafundi bashiya irobhothi livuliwe impelasonto noma balisebenzise kuze kume amamotho. Uma iseli lehla lingaphansi komkhawulo walo obucayi, kwakheka ama-shunt ethusi ngaphakathi. Uma ushaja kabusha iseli elonakele ngale ndlela, lingashoda ngaphakathi bese lithungela umlilo.
- Ukushayeka nokubhoboka: Izikhwama zefoyili ezithambile azinikezi ukuvikeleka kwemishini. Ibhethri elingaboshiwe eliphonswa phandle kwirobhothi lokulwa noma elichotshozwa ngaphansi kwe-chassis ngesikhathi kushayisana lingehlelwa ukwehluleka kwesihlukanisi sangaphakathi ngaso leso sikhathi noma emahoreni alandelayo.
- Ukukhetha iphrofayela engalungile yeshaja: Amashaja e-balance angahlelwa (njengalawo esitayela se-B6 atholakala yonke indawo) adinga umsebenzisi ukuba akhethe uhlobo lwamakhemikhali, inani lamaseli (isb. 2S, 3S, 4S), kanye namandla okushaja. Umfundi osetha ngephutha i-LiPo ye-3S (11.1V) ephrofayeleni yokushaja ye-4S (14.8V) uzophoqa iphakethe lingene ekushiseni okungalawuleki.
- Ukonakala ngamaholide: Ukushiya amaphakethe egcwele ngo-4.2V eselini ngalinye eshalofini amasonto amane amaholide ezikole zaseNingizimu Afrika kusheshisa ukwakheka kokumelana kwangaphakathi nokukhiqizwa kwegesi, okuholela kwibhethri esesijwayelekile "elikhukhumele".
Umgomo Wokugcina Ongabizi Ekilasini
Awudingi ikhabethe elithengiswayo elingaqhumi elibiza izinkulungwane zamarandi ukuze uvikele ilebhu yesikole. Udinga ukwehlukanisa ngokoqobo nesitsha esingavuthi.
1. Ithini Lezinhlamvu Elikhishwe Isivalo Serabha
Amathini ensimbi asele ezinhlamvu zempi ze-50-calibre awumgomo ophezulu wokugcina ama-LiPo ngezindleko eziphansi. Kodwa, kunomthetho wokuphepha obalulekile: khipha isivalo serabha esivalweni saphezulu. Uma i-LiPo ingena ekushiseni okungalawuleki ngaphakathi kwethini lezinhlamvu elivalwe ngokuphelele elingangeni moya, lelo thini liba yisitsha somfutho okungahlosiwe. Ukukhipha isivalo serabha kuvumela amagesi ukuba aphume ngokukhululeka kuyilapho izindonga zensimbi zibamba amalangabi nama-shunt ashisayo.
2. Indawo Ekhethekile Yokushaja
Ungalokothi uvumele ukushajwa kwamabhethri emabhentshini ajwayelekile abafundi azungezwe ukhadibhodi, i-filament yephrinta ye-3D, namaphepha. Misa isiteshi esisodwa esisemaphakathi sokushaja esinemithetho elandelayo:
- Sibekwe phansi kukhonkolo ongenalutho, ebhentshini lensimbi, noma endaweni yamathayela e-seramikhi—okungenani amamitha ayi-1.5 kude nezinto ezivuthayo.
- Sinesicimamlilo esikhethekile se-2kg noma se-5kg sempushana eyomile (noma se-CO₂) esifakwe eduze nje kwebhentshi. Qaphela: izicimamlilo ezijwayelekile ngeke ziwucime ngqo umlilo we-lithium, kodwa zivimbela izinto ezizungezile ngesikhathi iphakethe lizishwabadela.
- Umthetho wokuthi alikho ibhethri elishajwa lingagadiwe. Ukushaja kuyama ekupheleni kosuku lwesikole; akukho okushajwa ubusuku bonke.
Imithetho Yokushaja Nge-Balance Okumele Othisha Bayigcizelele
Ungalokothi uvumele abafundi basebenzise amashaja angenabuhlakani abizwa ngokuthi "wall wart" kuma-LiPo anamaseli amaningi. Amaphakethe anamaseli amaningi kumele ashajwe njalo kusetshenziswa intambo ye-balance (isixhumi esincane esimhlophe se-JST-XH esinezikhonkwane eziningi) kanye nentambo enkulu kagesi. Intambo ye-balance ivumela ishaja ukuba iqaphe futhi ilinganise ivolthi yeseli ngalinye.
| Isimo Sebhethri | Okuqondiwe Kwevolthi Yeseli | Isenzo Esidingekayo |
|---|---|---|
| Liphelile (Umkhawulo Wokusetshenziswa) | 3.5V – 3.6V eselini ngalinye | Misa irobhothi ngokushesha. Khipha iphakethe. |
| Ukugcinwa (Amakhefu ekota, izimpelasonto) | 3.80V – 3.85V eselini ngalinye | Sebenzisa uhlelo lwe-"Storage Charge/Discharge" kushaja yakho. |
| Ligcwele Ngokuphelele | 4.20V eselini ngalinye | Lisebenzise phakathi kwamahora angu-24–48; ungalishiyi lingasebenzi amasonto. |
| Lonakele / Libucayi | Ngaphansi kuka-2.8V eselini ngalinye | Ungalishaji. Lihlukanise ukuze lilahlwe. |
Setha amandla okushaja ngokuqaphela. Umgomo oyisisekelo ophephile emalebhu ezikole ngu-1C (lapho amandla elingana nomthamo wephakethe ngama-amp-hour; isibonelo, iphakethe le-2200mAh lishaja ngokungeqile ku-2.2A). Ungalokothi uvumele izindlela zokushaja ngokushesha ekilasini.
Kumaqembu akha izinto zomncintiswano adinga isiqondiso sokukhetha amabhethri ahambisana nemithetho futhi aphephile emncintiswaneni, izinsiza zethu ze-FIRST Tech Challenge zichaza ukuthi imaphi amaphakethe e-12V NiMH asemthethweni nokuthi anganakekelwa kanjani.
Indlela Yokuhoxisa Nokulahla Ngokuphepha Ama-LiPo Onakele
Noma yiliphi iphakethe elikhukhumele ngokubonakalayo ("pillowing"), elinephunga elimnandi lamakhemikhali, noma elinesela elingaphansi kuka-2.5V kumele likhishwe emsebenzini ngokushesha. Ungalilahli kudoti ovamile kamasipala.
Ukuze uhoxise ibhethri ngokuphepha:
- Hlukanisa: Faka iphakethe elonakele ethinini lakho lensimbi lokuhlukanisa ngaphandle kwesakhiwo esikhulu.
- Khipha wonke amandla kuze kube ngu-0.0V: Xhuma iphakethe kwisikhiphi-mandla esikhethekile, noma unamathisele ibhalbhu yemoto ye-12V edonsa amandla amancane kwisixhumi esifanele bese uyivumela idonse amandla ephaketheni amahora angu-24 kuze kufiphale i-filament. Lapho amandla esephelile ngempela afika ku-0V, amakhemikhali awasasebenzi.
- Nquma futhi uvale ngethephu: Sika izintambo zebhethri ngayinye ngayinye (ungalokothi usike i-positive ne-negative kanyekanye ngesikeli sensimbi), hlubula amaphethelo, bese usonta izintambo ndawonye noma uzivikele ngokugcwele ngethephu kagesi.
- Yisa kudoti wogesi: Yisa iphakethe elingasasebenzi endaweni ekhethekile kamasipala yokuqoqa udoti wogesi ozophinde usetshenziswe noma emgqonyeni wamabhethri.
Uma ubuyekeza uhlelo lwakho lwemishini yekilasi ngokubanzi noma udinga iseluleko sokushintsha izinhlelo zamandla ezidinga ukunakekelwa okuningi ngezinye ezingcono ngokuphepha kumabanga aphansi, vakashela umhlahlandlela wethu wokuthenga nokumisa ilebhu.
