Imvelo lapho kusetshenziswa ibhethri ye-polymer lithium nayo ibaluleke kakhulu ekuthonyeni impilo yayo yomjikelezo.Phakathi kwazo, izinga lokushisa le-ambient liyisici esibaluleke kakhulu.Izinga lokushisa eliphansi kakhulu noma eliphakeme kakhulu le-ambient lingathinta impilo yomjikelezo wamabhethri e-Li-polymer.Kuzinhlelo zokusebenza zebhethri zamandla nezinhlelo zokusebenza lapho izinga lokushisa liyithonya elikhulu, ukuphathwa okushisayo kwamabhethri e-Li-polymer kuyadingeka ukuze kuthuthukiswe ukusebenza kahle kwebhethri.

Izimbangela zokushintsha kwezinga lokushisa kwangaphakathi kwephakethe lebhethri le-Li-polymer

NgobaAmabhethri e-Li-polymer, isizukulwane sokushisa sangaphakathi ukushisa kokusabela, ukushisa kwe-polarization kanye nokushisa kwe-Joule.Esinye sezizathu eziyinhloko zokwenyuka kwezinga lokushisa kwebhethri ye-Li-polymer ukukhuphuka kwezinga lokushisa okubangelwa ukumelana kwangaphakathi kwebhethri.Ngaphezu kwalokho, ngenxa yokubekwa okuminyene komzimba weseli eshisayo, isifunda esiphakathi sibophezelekile ukuqoqa ukushisa okwengeziwe, futhi isifunda sonqenqema sincane, okwandisa ukungalingani kwezinga lokushisa phakathi kwamaseli ngamanye ebhethri ye-Li-polymer.

Izindlela zokulawula izinga lokushisa kwebhethri ye-polymer lithium

1. Ukulungiswa kwangaphakathi

Inzwa yokushisa izofakwa endaweni emele kakhulu, ushintsho olukhulu lokushisa endaweni, ikakhulukazi izinga lokushisa eliphakeme kakhulu neliphansi kakhulu, kanye nesikhungo se-polymer lithium battery heat accumulation endaweni enamandla kakhulu.

1. Umthetho wangaphandle

Umthetho wokupholisa: Njengamanje, uma kucatshangelwa ubunzima besakhiwo sokulawula ukushisa kwamabhethri e-Li-polymer, iningi lawo lamukela isakhiwo esilula sendlela yokupholisa umoya.Futhi uma kucatshangelwa ukufana kokukhishwa kokushisa, iningi labo lisebenzisa indlela yokufaka umoya ehambisanayo.

1. Ukulawulwa kwezinga lokushisa: Isakhiwo sokushisa esilula kakhulu ukufaka amapuleti okushisa phezulu nangaphansi kwebhethri ye-Li-polymer ukuze kusetshenziswe ukufudumeza, kunomugqa wokushisisa ngaphambi nangemuva kwebhethri ngalinye le-Li-polymer noma ukusetshenziswa kwefilimu yokufudumeza egoqweIbhethri ye-Li-polymerzokushisa.

Izizathu eziyinhloko zokunciphisa umthamo wamabhethri e-lithium polymer emazingeni okushisa aphansi

1. Ukungahambi kahle kwe-electrolyte, ukumanzisa okungekuhle kanye/noma ukungeneka kwe-diaphragm, ukufuduka kancane kwe-lithium ion, izinga lokudlulisa ukushaja elihamba kancane kusixhumi esibonakalayo se-electrode/electrolyte, njll.

2. Ngaphezu kwalokho, i-impedance ye-membrane ye-SEI iyanda emazingeni okushisa aphansi, inciphisa izinga le-lithium ion elidlula ku-electrode / electrolyte interface.Esinye sezizathu zokwanda kokuvinjelwa kwefilimu ye-SEI ukuthi kulula ukuthi i-lithium ion iphume ku-electrode engalungile emazingeni okushisa aphansi futhi kunzima kakhulu ukushumeka.

3. Uma ishaja, i-lithium metal izovela futhi isabele nge-electrolyte ukuze kwakhiwe ifilimu entsha ye-SEI ukuze imboze ifilimu yasekuqaleni ye-SEI, okwandisa ukungasebenzi kwebhethri ngaleyo ndlela kubangele amandla ebhethri ehle.

Izinga lokushisa eliphansi ekusebenzeni kwamabhethri e-lithium polymer

1. izinga lokushisa eliphansi ekushajeni nasekukhipheni ukusebenza

Njengoba izinga lokushisa liyehla, isilinganiso sokukhipha i-voltage kanye nomthamo wokukhulula weamabhethri e-lithium polymerziyancipha, ikakhulukazi uma izinga lokushisa lingu-20 ℃, amandla okukhipha ibhethri kanye ne-voltage yokukhipha isilinganiso kuncipha ngokushesha.

2. Ukushisa okuphansi ekusebenzeni komjikelezo

Umthamo webhethri ubola ngokushesha ku--10 ℃, futhi umthamo uhlala kuphela u-59mAh/g ngemva kwemijikelezo eyi-100, nokubola kwamandla angu-47.8%;ibhethri elikhishwe ngezinga lokushisa eliphansi lihlolwa kuzinga lokushisa legumbi ukuze lishajwe futhi likhishwe, futhi ukusebenza kokutholwa komthamo kuyahlolwa esikhathini.Umthamo wayo ubuyele ku-70.8mAh/g, nokulahlekelwa umthamo ngo-68%.Lokhu kubonisa ukuthi umjikelezo wezinga lokushisa eliphansi webhethri unomthelela omkhulu ekubuyiseni umthamo webhethri.

3. Umthelela wokushisa ophansi ekusebenzeni kokuphepha

Ukushaja kwebhethri ye-lithium ye-polymer kuyinqubo yama-ion e-lithium aphuma ku-electrode ephozithivu ngokufuduka kwe-electrolyte eshumekwe entweni engeyinhle, i-lithium ion iye ku-polymerization ye-electrode negative, ngama-athomu e-carbon ayisithupha athatha i-lithium ion.Emazingeni okushisa aphansi, umsebenzi wokusabela kwamakhemikhali uyancishiswa, kuyilapho ukufuduka kwama-ion e-lithium kuba kancane, ama-ion e-lithium ebusweni be-electrode engemihle awakashunyeki ku-electrode engemihle ancishisiwe abe yinsimbi ye-lithium, kanye nemvula indawo ye-electrode engeyinhle ukwenza i-lithium dendrites, engabhoboza kalula i-diaphragm ibangele ukujikeleza okufushane ebhethrini, okungalimaza ibhethri futhi kubangele izingozi zokuphepha.

Okokugcina, sisafuna ukukukhumbuza ukuthi amabhethri e-lithium polymer angcono kakhulu ukuthi angakhokhiswa ebusika emazingeni okushisa aphansi, ngenxa yamazinga okushisa aphansi, ama-ion e-lithium abekwe phezu kwe-electrode engalungile azokhiqiza amakristalu e-ion, abhoboze i-diaphragm ngokuqondile, okuvame ukubangela I-micro-short circuit ithinta impilo nokusebenza, ukuqhuma okukhulu okuqondile.Ngakho-ke abanye abantu babonisa ukushaja kwebhethri ye-polymer ye-lithium yasebusika ayikwazi ukushajwa, lokhu kungenxa yokuhlukana nohlelo lokuphatha ibhethri kungenxa yokuvikelwa komkhiqizo.