Okwangoku, iibhetri ze-lithium zisetyenziswa kakhulu kwizixhobo ezahlukeneyo zedijithali ezifana neencwadana, iikhamera zedijithali, kunye neekhamera zevidiyo zedijithali. Ukongeza, zikwanamathuba amaninzi kwiimoto, izikhululo zesiseko esiphathwayo, kunye nezikhululo zamandla okugcina amandla. Kule meko, ukusetyenziswa kweebhetri akusabonakali kodwa njengakwiifowuni eziphathwayo, kodwa kubonakala ngakumbi ngendlela yeepakethe zebhetri ezilandelelanayo okanye ezihambelanayo.
Umthamo kunye nobomi bebhetri abuhambelani nebhetri nganye kuphela, kodwa bunxulumene nokungaguquguquki kwebhetri nganye. Ukungaguquguquki okungalunganga kuya kuyitsalela phantsi kakhulu ukusebenza kwebhetri. Ukungaguquguquki kokuzikhupha yinxalenye ebalulekileyo yezinto ezichaphazelayo. Ibhetri enokuzikhupha ngokungaguquguqukiyo iya kuba nomahluko omkhulu kwi-SOC emva kwexesha lokugcina, nto leyo eya kuchaphazela kakhulu amandla ayo kunye nokhuseleko lwayo.
Kutheni kwenzeka ukuzikhupha?
Xa ibhetri ivuliwe, le mpendulo ingasentla ayibonakali, kodwa amandla aya kuncipha, okubangelwa ikakhulu kukuzikhupha kwebhetri ngokwayo. Izizathu eziphambili zokuzikhupha zezi:
a. Ukuvuza kwe-electron yangaphakathi okubangelwa kukuhanjiswa kwe-electrolyte okanye ezinye ii-internal short circuits ze-electron zangaphakathi.
b. Ukuvuza kombane wangaphandle ngenxa yokungabi namandla okuthintela ukugquma kwetywina zebhetri okanye iigasket okanye ukungamelani ngokwaneleyo phakathi kwamaqokobhe elothe angaphandle (ii-conductor zangaphandle, ukufuma).
c. Iimpendulo ze-electrode/electrolyte, ezifana nokugqwala kwe-anode okanye ukuncipha kwe-cathode ngenxa ye-electrolyte, ukungcola.
d. Ukubola okungaphelelanga kwezinto ezisebenzayo ze-electrode.
e. Ukudluliselwa kwee-electrode ngenxa yeemveliso zokubola (izinto ezinganyibilikiyo kunye neegesi ezifakwe kwi-absorbed).
f. I-electrode igugile ngoomatshini okanye ukumelana phakathi kwe-electrode kunye nomqokeleli wangoku kuba kukhulu.
Impembelelo yokuzikhupha emzimbeni
Ukuzikhupha ngokwakho kukhokelela ekwehleni komthamo ngexesha lokugcina.Iingxaki ezininzi eziqhelekileyo ezibangelwa kukuzikhupha emzimbeni ngokugqithisileyo:
1. Imoto ipakwe ixesha elide kakhulu kwaye ayinakuqaliswa;
2. Ngaphambi kokuba ibhetri ibekwe kwindawo yokugcina, i-voltage nezinye izinto ziqhelekile, kwaye kufunyaniswa ukuba i-voltage iphantsi okanye i-zero xa ithunyelwa;
3. Ehlotyeni, ukuba i-GPS yemoto ibekwe emotweni, ixesha lombane okanye lokusebenzisa aliyi kwanela emva kwexesha elithile, nokuba ibhetri ivuvukele.
Ukuzikhupha ngokwakho kukhokelela ekwandeni komahluko phakathi kwee-SOC phakathi kweebhetri kunye nomthamo webhetri ophantsi
Ngenxa yokungazikhuphi ibhetri ngokungaguqukiyo, i-SOC yebhetri ekwiphakheji yebhetri iya kwahluka emva kokugcinwa, kwaye ukusebenza kwebhetri kuya kuncipha. Abathengi banokufumana ingxaki yokuwohloka kokusebenza emva kokufumana iphakheji yebhetri ebigcinwe ixesha elithile. Xa umahluko we-SOC ufikelela malunga ne-20%, umthamo webhetri edibeneyo yi-60% ~ 70% kuphela.
Ungayisombulula njani ingxaki yomahluko omkhulu we-SOC obangelwa kukuzikhupha?
Ngokulula nje, Sidinga kuphela ukulinganisela amandla ebhetri size sidlulisele amandla eseli ene-voltage ephezulu kwiseli ene-voltage ephantsi. Okwangoku kukho iindlela ezimbini: ukulinganisela okungasebenziyo kunye nokulinganisela okusebenzayo.
Ukulingana okungasebenziyo kukuqhagamshela i-resistor yokulinganisela ngokuhambelana neseli nganye yebhetri. Xa iseli ifikelela kwi-overvoltage kwangaphambili, ibhetri isenokuphinda itshajwe kwaye itshajwe nezinye iibhetri ezine-voltage ephantsi. Ukusebenza kakuhle kwale ndlela yokulinganisa akuphezulu, kwaye amandla alahlekileyo alahleka ngendlela yobushushu. Ukulingana kufuneka kwenziwe kwimo yokutshaja, kwaye umsinga wokulinganisa ngokubanzi yi-30mA ukuya kwi-100mA.
Isilinganisi esisebenzayongokubanzi ilinganisa ibhetri ngokudlulisa amandla kwaye idlulisele amandla eeseli ngevolthi ephezulu kwezinye iiseli ezinevolthi ephantsi. Le ndlela yokulinganisa isebenza kakuhle kwaye inokulinganiswa kwiimeko zokutshaja kunye nokukhupha. Umsinga wayo wokulinganisa mkhulu ngokuphindwe kaninzi kunomsinga wokulinganisa ongasebenziyo, ngokubanzi phakathi kwe-1A-10A.
Ixesha lokuthumela: Juni-17-2023
