Ulwazi lokhuseleko lwebhetri yeLithium-ion

Isakhiwo sebhetri yeLithium-ion

Okokuqala, makhe sijonge isakhiwo seebhetri ze-lithium-ion.

I-solvents eziphilayo ezisetyenziselwa kwiibhetri ze-lithium-ion ziqulethe

1. I-Acid carbonates: i-carbon vinyl ester (EC), i-diethyl carbonate (DEC), i-dimethyl carbonate (DMC), i-methyl ethyl carbonate (EMC), i-propylene carbonate (i-PC), njl.

2. Carboxylic acid esters: (methyl formate (MF), methyl acetate (MA), njl.)

3. Izinyibilikisi ze-Ether eziphilayo (i-ethylene glycol dimethyl ether (DME), njl.

4. I-sulfur equkethe i-solvents ye-organic: i-vinyl sulfite, njl.

I-Electrolyte (ityuwa ye-electrolyte LiPF6) isinyibiliki senziwe ikakhulu yi-alkyl carbonate, efana ne-dimethyl carbonate (DMC), i-diethyl carbonate (DEC), i-methyl ethyl carbonate (EMC), njl. ityala lomlilo.

I-Lithium hexafluorophosphate (LiPF6) inesiphumo esonakalisayo.Ukungatshi, ukusabela nge-asidi xa kushushu kuya kuvelisa i-hydrogen fluoride eyingozi (i-corrosive).IHydrogen fluoride idibana nentsimbi ukuvelisa irhasi eqhumayo.

Ivelisa iintlantsi ezivutha i-electrolyte, ethi yona ichithele kumzimba weplastiki kunye nezinto ezinokutsha ezidibana nayo, ibangele umlilo.

Ukudala ukunyuka ngokukhawuleza kwamaqondo obushushu ngaphakathi kwiseli, eyindawo encinci kakhulu ngaphakathi kwiseli kwaye inokudubula ngenxa yoxinzelelo olwandisiweyo.

Iqondo lobushushu ngaphakathi ebhetrini liyenyuka kancinane kwaye iqokobhe lebhetri linyibilika kancinane, nto leyo ebangela ukuba i-electrolyte eyonakalisayo ivuze.

Ukuchongwa kwezinto ezinobungozi kunye neziyingozi zeebhetri ze-lithium

(1) indlela yengozi yomlilo ye-lithium ibhetri

Njengoko kubonisiwe kumfanekiso

lithium battery fire accident mechanism

I-1) Umphumo we-overcharge kwibhetri ye-lithium-ion

Kwinkqubo yokutshaja kakhulu, i-voltage yebhetri ye-lithium iya kuphulukana nolawulo kwaye iqhubeke nokunyuka, izinto ze-cathode kwilizwe le-lithium-ihlwempu ziya kubola kwaye zikhulule ubushushu, xa amandla e-cathode enyuka kwi-electrolyte oxidation decomposition potential, i-electrolyte i-oxidize kunye nokubola phezu kwendawo ye-cathode, ukukhulula umthamo omkhulu wegesi kunye nobushushu, ngoko ke umngcipheko wokugqabhuka, umsi, umlilo kunye nokuqhuma.

2) Umphumo wesiphaluka esifutshane kwi-lithium ion

Izinto ze-electrode kunye ne-electrolyte yebhetri ye-lithium-ion ziyatsha kwaye zonakaliswe ngokulula, okukhokelela kwisiphaluka esifutshane ngaphakathi kwebhetri, amandla amakhulu agcinwe kwi-short-circuit lithium ibhetri iya kukhutshwa ngokukhawuleza ngendlela yobushushu, le ndlela yokuziphatha exothermic ngokukhawuleza. kuya kubangela ukuba ukushisa kwangaphakathi kwebhetri kuphakame ngokukhawuleza, i-electrolyte kulula ukuyitshisa kumaqondo aphezulu, okubangela umngcipheko wokuqhekeka, umsi kunye nomlilo.

Ukhuseleko lwebhetri yeLithium-ion

1. Iibhetri ze-lithium-ion zinqatshelwe ngokungqongqo kwi-terminals yokutshaja, kufuneka isebenzise itshaja ekhethekileyo ehambelanayo ukusuka kwisokethi yokutshaja ukuhlawula.Xa isalathisi sokutshaja kwitshaja siyeka ukuqengqeleka, nceda uyisuse kwangoko iplagi yokutshaja ukunqanda ukutshaja kakhulu ibhetri.

2. I-lithium-ion ibhetri yepakethe kunye nomsebenzi wokukhusela ngokugqithisileyo, xa ukusetyenziswa kwezixhobo zombane zangoku kudlula ubuninzi bemveliso yangoku yemveliso, isenzo sesiphaluka sokukhusela ngokugqithisileyo kunye nokwenza ukusetyenziswa kwezixhobo zombane akubonakali kusebenza ngokufanelekileyo.

3. Isixokelelwano sebhetri kufuneka sigcinwe kwindawo ecocekileyo, eyomileyo nengena moya yangaphakathi eneqondo lobushushu obuyi-20±5 kunye neqondo lobushushu elingekho ngaphezulu kwe-75%.


Ixesha lokuposa: Aug-24-2021