Thermal protection chu eng nge ni?

Thermal protection chu lithium{{0}ion cell hian mei a man loh nan a veng a ni. Kum 18650 i hman tawh zawng zawngah chuan safety device tam tak a awm a, chu top cap te tak te-PTC, CID, Vent disc, works te chu a cramm vek a ni. An awm chhan chu lithium-ion chemistry hian hmun tlemteah chakna ton khat a dahkhawm a, chu chakna chuan thil engemaw chu a chhungril lama a kalsual chuan chhuahna tur kawng a zawng ang.

He industry-ah hian hun rei tak ka awm tawh a, "thermal runaway" tih hi inchhung thumal a nih loh lai hriatreng theih turin ka awm tawh. Chumi hnuah chuan Dell laptop chuan kum 2006 khan a rawn hrechhuak leh a, Sony chuan cell maktaduai tam tak a pull a. Vawikhat chu mi zawng zawngin lithium-ion cell a hlawhchham chuan eng nge thleng tih hriat an duh a, a pawimawh zawk chu engtin nge tihtawp theih ang tih hriat an duh a ni.

Thermal Runaway leh Overheating te a awm bawk.

Mite chuan hengte hi an pawlh fo thin. Overheating chu cell pakhat chu pawn lam atanga a lum atanga a lum a nih chuan-Car lum takah i dah a, charger a chhiat chuan, eng pawh ni se. Heat source chu la chhuakin cell chu a lum thla a. Buaina chinfel a ni.

Thermal Runaway hi sakawlh danglam tak a ni. Cell chhungah thil engemaw a fail-Separator hian a puncture a ni mai thei, thil siamna defect chuan soft short- a siam tan a, cell chuan a heat a siam tan mai thei. Chu lumna chuan chemical breakdown a ti chak a, chu chuan heat tam zawk a siam a, chu chuan breakdown chu a ti chak lehzual a ni. Feedback loop a ni. I hriat chian meuh chuan chawlhsan a tlai tawh hle.

Cell hian gas lum leh meialh a chhuah tir a, a chang chuan tharum thawhna a thlen thin. Battery pack-ah chuan tlanchhia cell pakhat chuan a ṭhenawmte chu a siam thei a, chain reaction a siam thei bawk. Hei vang hian thermal protection a awm a ni.

A venhimna stack .

Cylindrical cell pakhat chu crack la, a chung lam cap chu en rawh. Chutah chuan device engemaw zat dahkhawmna i hmu ang a, stage hrang hranga harsatna awm thei tur atana siam vek a ni.

Ptc a ni a.

PTC (positive temperature coefficient) device chu i line hmasa ber a ni. A bul berah chuan polymer wafer conductive particle hmanga load a ni. Normal temps, resistance hniam, current a luang tha hle. 80℃aia sangah la la, polymer chu a swell a, particle te chu a inthen a, resistance chu roof chhungah a kal a. current drop chu engmah lo mai mai a ni.

PTCs ka duh ber chu an reset a ni. Cell chu ti lum la, a thawk leh ang. External shorts clear rang thei tak tak man nan a tha.

Ka duh loh ber chu series string-a an awm dan hi a ni. Kum tlemte kalta a pack test lai khan he pakhat hi harsa takin kan zir a. Cell pakhat PTC chu a trip a, mahse a hnung lamah 48V string a awm a, voltage chu a rawn arc a, a sir lamah a awm ta a ni. Cell level-a hna thawk tha tak protection chu pack level-ah a scale ngai lo.

Separator khar a ni ang.

Separator chu chu membrane te tak te chu i electrode te chu a inthlau a, chutih rualin lithium ion te chu a luh tir bawk. Shutdown separator-ah chuan material chu 130℃velin a nem a, pores chu a seal up bawk. Ion transport a awm lo, electrochemical reaction a awm lo, current a awm lo.

Multilayer designs-pe inner layer, pp outer layer-Thil dang extra margin pe rawh. PE chuan ion flow a khar laiin PP chuan engkim chu mechanically-in a inthen rei deuh vek thung. kan lei a, internal shorts siam hmain abuse testing-ah second 10-15 vel extra a awm mai thei.

Thil pakhat hriat reng tur: Separator te hi an lo kir leh tawh lo. Cell pakhat a lum tawk a, shutdown a thlen theih chuan chu cell chu a ti zo ta a ni. A thlak leh rawh.

Cid a ni a.

Tuna interrupt device hian pressure a pe a, temperature a pe lo. Thil chu a chhunga a decompose tan chuan gas a siam chhuak thin. CID hi discs spot pahnih-Welded together a ni a, internal pressure a sang tawk a nih chuan a pop apart a ni-Somewhere around 1 MPa a design a zirin.

Hei hi permanent disconnect a ni. Cell pakhatin gas a siam chhuah lai chuan hman theih loh khawpin a chhe tawh a ni. Circuit atang chuan i duh a ni.

Vent 100 a ni.

A tawp berah chuan. Pressure hian CID activation kaltlanga a siam chhunzawm zel chuan vent disc te chu a rupture a, gas te chu a tlanchhuak thei a ni. Thil rawn chhuak tur chu a kang thei a, a toxic a, mahse controlled venting chuan control loh rupture a hneh thung. Firecracker ang maia cell kal chhuah video te chu kan hmu vek tawh-chu chu venting mumal nei lovin a thleng thin.

BMS Layer chu a ni.

Cell-Level venhimna hian hlawhchhamna rang tak a handle thin. Battery management system hian thil dang zawng zawng a handle thei-Pack temperature enfiah, thil a lum chuan throttling charge rates, sensor readings range atanga a chhuah chuan contactors disconnecting.

System pahnih hi an inzawm tlat a ni. BMS hian thermal management tha taka a ven theih tur harsatna siam chhuak slow-chu a man a ni. Cell-level devices hian surface sensor-in a hun taka a hriat theih loh internal failure chak tak takte chu a man thei a ni.

Chemistry hian danglamna a siam a .

Lithium-ion zawng zawng hi thermal stability chungchangah chuan a inang vek lo. I cobalt-a siam chemistries-LCO, NMC-energy density ropui tak ni mahse thermally touchy an ni. Cobalt-oxygen bond chu elevated temps-ah a inthen a, reaction chawmtu oxygen a chhuah tir thin.

LFP hi a ngaidam zawk. Iron-Phosphate structure hian thermal stress hnuaiah a vawng tlat a. Normal operation leh hlauhawmna zone inkar ah headroom i nei tam zawk. Same protection devices, mahse edge hnaih angin an thawk lo.

Hei hi LFP-in material handling lama a lakluh chhan lian tak a ni. Forklifts hian nun harsa tak a hmang-fast charging, temperature swings, a chang chuan abuse. A la thei tur chemistry i duh a ni. Polinovel pack zawng zawng hi hetiang chiah hian LFP cell hmanga siam a ni.