Yanayin da ake amfani da baturin lithium na polymer shima yana da matukar mahimmanci wajen tasiri a rayuwar sa. Daga cikin su, yanayin zafi yana da matukar muhimmanci. Matsakaicin zafin jiki ko tsayin yanayi na iya shafar rayuwar zagayowar batirin Li-polymer. A aikace-aikacen baturi da aikace-aikace inda zafin jiki ya kasance babban tasiri, ana buƙatar sarrafa zafin jiki na batir Li-polymer don inganta ƙarfin baturin.

Dalilan canjin zafin ciki na fakitin baturin Li-polymer

DominLi-polymer baturi, Ƙwararrun zafi na ciki shine zafin amsawa, zafi na polarization da zafi Joule. Ɗaya daga cikin manyan dalilan da ke haifar da karuwar zafin baturi na Li-polymer shine yawan zafin jiki da ke haifar da juriya na ciki na baturin. Bugu da kari, saboda matsananciyar jeri na jikin tantanin halitta mai zafi, yankin tsakiya ya daure ya tattara karin zafi, kuma yankin gefen ya ragu, wanda ke kara yawan rashin daidaiton yanayin zafi tsakanin sel guda daya a cikin batirin Li-polymer.

Hanyoyin daidaita zafin baturi lithium polymer

1. Daidaitawar ciki

Za a sanya firikwensin zafin jiki a cikin mafi yawan wakilai, canjin zafin jiki mafi girma a wurin, musamman ma mafi girma da mafi ƙasƙanci, da kuma tsakiyar ƙwayar baturi na polymer lithium zafi mafi girma.

1. Dokokin waje

Ka'idojin sanyaya: A halin yanzu, idan aka yi la'akari da sarkar tsarin kula da yanayin zafi na batir Li-polymer, yawancinsu sun ɗauki tsari mai sauƙi na hanyar sanyaya iska. Kuma idan aka yi la’akari da daidaiton ɓarkewar zafi, yawancinsu sun ɗauki hanyar iskar da iska mai kama da juna.

1. Tsarin zafin jiki: tsarin dumama mafi sauƙi shine ƙara faranti na dumama a sama da ƙasa na baturin Li-polymer don aiwatar da dumama, akwai layin dumama kafin da bayan kowane baturin Li-polymer ko amfani da fim ɗin dumama nannade a kusa daLi-polymer baturidomin dumama.

Babban dalilan da ke haifar da raguwa a cikin ƙarfin baturin lithium polymer a ƙananan yanayin zafi

1. Mummunan halayen electrolyte, rashin jika da/ko ƙetarewa na diaphragm, ƙaura a hankali na ions lithium, saurin canja wurin cajin wutar lantarki/electrolyte interface, da sauransu.

2. Bugu da ƙari, ƙaddamar da ƙwayar SEI yana ƙaruwa a ƙananan yanayin zafi, yana rage yawan adadin lithium ions da ke wucewa ta hanyar haɗin lantarki / electrolyte. Ɗaya daga cikin dalilan da ke haifar da karuwa a cikin impedance na fim din SEI shine cewa yana da sauƙi ga ions lithium don fitowa daga mummunan lantarki a ƙananan yanayin zafi kuma mafi wuya a saka.

3. Lokacin da ake caji, ƙarfe na lithium zai bayyana kuma ya amsa tare da electrolyte don samar da sabon fim na SEI don rufe ainihin fim ɗin SEI, wanda ke ƙara ƙarfin baturi don haka ya sa ƙarfin baturi ya ragu.

Ƙananan zafin jiki akan aikin batirin lithium polymer

1. ƙananan zafin jiki akan caji da aikin fitarwa

Yayin da zafin jiki ya ragu, matsakaicin ƙarfin fitarwa da ƙarfin fitarwa nalithium polymer baturian rage, musamman lokacin da zafin jiki ya kasance -20 ℃, ƙarfin fitarwar baturi da matsakaicin ƙarfin fitarwa yana raguwa da sauri.

2. Ƙananan zafin jiki akan aikin sake zagayowar

Ƙarfin baturi yana raguwa da sauri a -10 ℃, kuma ƙarfin kawai ya rage 59mAh / g bayan hawan hawan 100, tare da lalata ƙarfin 47.8%; batirin da aka fitar a ƙananan zafin jiki ana gwada shi a zazzabi na ɗaki don yin caji da fitarwa, kuma ana duba aikin dawo da ƙarfin a cikin lokacin. An dawo da ƙarfinsa zuwa 70.8mAh/g, tare da asarar ƙarfin 68%. Wannan yana nuna cewa ƙananan yanayin zafi na baturi yana da tasiri mafi girma akan dawo da ƙarfin baturi.

3. Ƙananan tasirin zafi akan aikin aminci

Cajin baturi na lithium na polymer shine aiwatar da ions lithium da ke fitowa daga ingantacciyar lantarki ta hanyar ƙaurawar electrolyte da aka saka a cikin mummunan abu, ion lithium zuwa ga gurɓataccen electrode polymerization, ta ƙwayoyin carbon guda shida suna ɗaukar ion lithium. A cikin ƙananan yanayin zafi, aikin halayen sinadaran yana raguwa, yayin da ƙaura na ions lithium ya zama mai hankali, ions lithium a saman ma'aunin wutar lantarki ba a sanya shi a cikin ƙananan lantarki ba ya rage zuwa karfe na lithium, da hazo a kan hazo. saman na'urar lantarki mara kyau don samar da lithium dendrites, wanda zai iya huda diaphragm cikin sauƙi yana haifar da ɗan gajeren da'ira a cikin baturin, wanda zai iya lalata baturin kuma ya haifar da haɗari na aminci.

A ƙarshe, har yanzu muna so mu tunatar da ku cewa ba a cajin batirin lithium polymer ba a cikin hunturu a yanayin zafi mara kyau, saboda ƙarancin yanayin zafi, ion lithium da aka yi a kan gurɓataccen lantarki zai samar da lu'ulu'u na ion, kai tsaye suna huda diaphragm, wanda gabaɗaya yana haifar da ƙananan gajeriyar kewayawa yana rinjayar rayuwa da aiki, fashewa mai tsanani kai tsaye. Don haka wasu mutane suna nuna cajin baturin lithium polymer na hunturu ba za a iya caji ba, wannan yana faruwa ne saboda ɓangaren tsarin sarrafa baturi saboda kariyar samfurin.