Battery short circuit imhosva yakakomba: simba remakemikari rakachengetwa mubheteri richarasika nenzira yesimba rinopisa, chigadzirwa hachigoni kushandiswa.Panguva imwecheteyo, pfupi pfupi inoumbawo chizvarwa chakaoma chekupisa, izvo zvisingangodzikisi kushanda kwezvinhu zvebheteri, asi zvinogona kutotungamirira kumoto kana kuputika nekuda kwekupisa kwekupisa.Kuti tibvise mamiriro ezvinhu anogona kuitika mumudziyo unogona kuumba dunhu diki uye kuona kuti dunhu diki hariumbe mamiriro ekushandisa ane njodzi, tinogona kushandisa COMSOL Multiphysics kudzidza kuronga kwe lithium-ion mabhatiri.
Battery short circuit inoitika sei?
Bhatiri rinokwanisa kushandura simba remakemikari rakachengetwa kuita simba remagetsi.Munguva yekushanda kwakajairika, maelectrode maviri ebhatiri anoburitsa maitiro emagetsi ekudzikisa maitiro eiyo negative electrode uye oxidation reaction yeanode.Munguva yekuyerera, iyo yakanaka electrode ndeye 0.10-600 uye iyo yakaipa electrode yakanaka;panguva yekuchaja, mavara maviri e electrode anoshandurwa, ndiko kuti, iyo yakanaka electrode yakanaka uye iyo yakaipa electrode yakaipa.
Imwe electrode inoburitsa maerekitironi mudunhu, nepo imwe electrode inotora maerekitironi kubva kudunhu.Iyi ndiyo inoyevedza kemikari kuita inotyaira yazvino mudunhu uye nekudaro chero mudziyo, senge mota kana girobhu remwenje, unokwanisa kuwana simba kubva mubhatiri kana wakabatana kwairi.
Iyo inonzi short circuit inguva iyo maerekitironi asingayereri kuburikidza nedunhu rakabatana nemagetsi, asi kufamba zvakananga pakati pemagetsi maviri.Sezvo maerekitironi aya asingade kuita chero basa remuchina, kushorwa kudiki kwazvo.Nekuda kweizvozvo, iyo kemikari yekuita inomhanyisa uye bhatiri rinotanga kuzviburitsa, kurasikirwa nekemikari simba pasina kuita chero basa rinobatsira.Kana ipfupi-inotenderera, yakawandisa ikozvino inoita kuti bhatiri rirambe richipisa (Joule kupisa), izvo zvinogona kukuvadza mudziyo.
Mechanical kukuvara mubhatiri ndechimwe chezvikonzero zvepfupi pfupi.Kana chinhu chesimbi chekunze chikabaya bhatiri pack kana bhatiri paki rikakuvadzwa nekukanyiwa, rinogadzira nzira yemukati inoitisa uye kuita dunhu pfupi.Iyo "pinprick test" ndiyo yakajairwa kuchengetedza bvunzo yelithium-ion mabhatiri.Panguva yekuyedzwa, tsono yesimbi inobaya bhatiri uye ipfupi.
Dzivirira kupfupika kwebhatiri
Bhatiri kana bhatiri paki inofanirwa kuchengetedzwa kubva kupfupi wedunhu, kusanganisira matanho ekudzivirira bhatiri uye imwechete pasuru yezvinhu zvinoitisa zvinosangana.Mabhatiri akaiswa mumabhokisi ekutakura uye anofanirwa kuparadzaniswa kubva kune mumwe nemumwe mukati mebhokisi, ane matanda akanaka uye asina kunaka akaiswa munzira imwechete kana mabhatiri akaiswa parutivi.
Kudzivirira kupfupika-kutenderera kwemabhatiri kunosanganisira, asi hakugumiri kune, nzira dzinotevera.
a.Pazvinogoneka, shandisa chivharo chemukati chakavharirwa chose chakagadzirwa nezvinhu zvisiri-conductive (semuenzaniso, mabhegi epurasitiki) sero rega rega kana mudziyo wega wega une bhatiri.
b.Shandisa nzira yakakodzera yekuisa yega kana kurongedza bhatiri kuitira kuti isasangana nemamwe mabhatiri, zvishandiso, kana conductive zvinhu (semuenzaniso, simbi) mukati mepasuru.
c.Shandisa kwete-conductive protective caps, insulating tepi, kana imwe nzira yakakodzera yekudzivirira yemagetsi akafumurwa kana mapulagi.
Kana iyo yekunze yekurongedza isingakwanise kuramba kudhumhana, saka iyo yekunze yekurongedza chete haifanirwe kushandiswa seyero yekudzivirira bhatiri electrodes kubva pakupwanya kana kupfupi-kutenderera.Bhatiri rinofanirawo kushandisa padding kudzivirira kufamba, kana zvisina kudaro chivharo che electrode chakasununguka nekuda kwekufamba, kana electrode inoshandura nzira kuti iite pfupi pfupi.
Electrode dziviriro nzira dzinosanganisira, asi hadzina kugumira kune, anotevera matanho:
a.Kubatanidza ma electrode zvakachengeteka kune chivharo chesimba rakakwana.
b.Bhatiri rakarongedzwa mupurasitiki yakaoma.
c.Shandisa dhizaini yakadzokororwa kana kuve neimwe dziviriro yemagetsi ebhatiri kuitira kuti maelectrode asatyoke kunyangwe pasuru yakadonha.
Nguva yekutumira: Feb-07-2023