Temperature monitoring tih hi eng nge ni?
Metro Detroit-a Tier 1 supplier-ah pack validation ka ti a, kum thum chhung zet chu pack validation ka ti a. Temperature monitoring hi nitin ka deal tawh atanga 40% vel a ni mai thei. A buaithlak vang a ni lo. A chhan chu miten chutiang bawk chuan an screw up zel a ni.
Lab environment-a validation testing neih a ni.
A bulpui ber chu cell-ah thermistors i stick a, number i en a ni. Chu chu a ni. NTCS a tam zawk. A man tlawm, a dik tawk, mi zawng zawngin hman dan an hre vek. Harsatna chu khawiah nge dah tur dik tak leh engzat nge i mamawh tak tak tih i zawh hian a intan thin.
Cost pressure hi a brutal hle. Program manager te chuan sensor tlem zawk an duh a. Thermal engineer te chuan a dang an duh zawk. Chutiang thubuai tam tak chu ka thu a. Inremna chu mi zawng zawng tan hmun nuam lo tak a ni tlangpui. Cell 12 nei module pakhat tan sensor pariat. Hottest tur nia i ngaih cell-ah dah la, i guess dik ngei ka beisei.
Thermal simulation hian a tak tak a tlin-Khawvel harsatna.
Simulation leh thil tak tak te.
He thil hi Ansys emaw Star-CCM+ ah i model thei a, i mit a thisen chhuah thlengin. Simulation hian module pakhata center cells te chu a sir lam aiin a lum zawk tih a hrilh che a ni. Tabs chu can bodies aiin a hot zawk. Chutiang zawng zawng chu mak tih tur a awm lo. Simulation-in a hrilh loh che chu i production line-in thermal paste on inconsistent taka a dah chuan a thleng thin. emaw, batch chhe tak atanga cell pakhatin a dangte aiin a chhungril lama a do theihna a sang deuh deuh chuan. emaw, customer-in exhaust manifold bulah air intake nei lirtheia pack a dah chuan. Pathum zawng zawng an hmu vek.
Thermal runaway hian ngaihven a hlawh vek. Fair tawk tak a ni. Cell pakhat tlan lut chhunga lut chuan chakna tam tak a dum nghal vat thin. Monitoring system hian temperature spike chu a hmaa thil tih theih turin a man hma a ngai a ni. Contactors te chu hawng rawh. I neih chuan suppression activate rawh. At minimum log everything a nih chuan a hnua thil thleng chu i hre thei ang.
Hetah hian thil awmzia chu a awm. Runaway hi a rare hle mai. Field-a pack that tak tak chu kum tam tak chhunga cell-te duh aia℃5 emaw 10 emaw vela lum zawk a ni. Capacity a fade. Power a bo tawh. Meipui i hmu dawn lo. Kum 4-naah warranty claims i hmu ang a, chutih hunah chuan range chu spec hnuaiah a tla thla ang. Chutiang atan chuan temperature monitoring a pawimawh a mahse a dramatic lo zawk a, chuvang chuan miten an ngaihtuah vak lo.
BMS hian temperature chu 1 Hz ang deuhin a sample a. A chang chuan a slow zawk thin. Cell-a thermal events hi second khat atanga minute khat chhungin a thleng thin a, chuvang chuan a tam hle. A pawimawh zawk chu threshold limits set na hmun a ni.
Conservative lutuk leh pack-in headroom a la neih laiin power i cut a. Aggressive lutuk leh cells i siam lai a ni. Hemi chungchangah hian OEM tin hian philosophy hrang hrang an nei vek a. Ṭhenkhat chuan maximum performance an tum a, ṭhenkhat chuan dam rei an ngai pawimawh ber. Ni lum takah chuan fast charger-a lirthei chu engtin nge a awm tih chu i hre thei tlangpui.
A cold reality .
Khua lum hi a takah chuan khaw lum aiin hmachhawn a harsa zawk. Minus 20 C-a pack pakhat hian power a nei lo tluk a ni. Internal resistance chu a sang chho zel. Cell te hian lithium plating risk lovin charge current tam tak an pawm thei lo. Chuvangin heating i mamawh a, chu chu i hman theih hmaa pack warm up nan energy hal tihna a ni. Lirthei thenkhat chu departure time i set hunah automatic in precondition rawh. Midangte chuan an thut tir che a, nghak rengin.
Chu context-a temperature monitoring tih awmzia chu pack chu hman tak tak theih tur khawpa lum a nih hun hriat a ngai tihna a ni. Tin, heating system hian hot spot a siam loh nan. Cell pakhat bulah ngei PTC heater tlan laiin midangte chu a lum reng a, a lian lo hle. Chu pawh chu a hmu ve bawk.
Sensing technology a lo inthlak danglam dan.
Industry hian sensor tam zawk lam an pan mek a, tlem zawk erawh an pan lo. A then chu NTCs a man tlawm zel vang a ni. A then chu analytics miten an degradation models feed turin data tam zawk an duh vang a ni. Cell chhunga fiber optics chungchang sawi a awm a mahse chu chu line-a ka hmuh chuan production ready a ni tih ka ring ang. Tunah chuan cell can leh busbar-a thermistor-te a ni a, kum 15 chhung zet a lo awm tawh ang bawkin.
Thermal issue neia field atanga rawn let leh pack tin hian kan tih hmasak ber chu log data kan pull vek a ni. Event thleng tur temperature profile te en rawh. Vawi sawm zinga vawi 9 lai chu a dik lo tih chiang takin i hmu thei. Cell 23 hi a hlawhchham hma kar tam tak chhung chu a ṭhenawmte aiin a lum zawk a ni. Mi tu emaw chuan chu chu a man ngei tur a ni. Mahse threshold chu 45 C ah set a ni a, 42 aia sang a ni ngai lo.Chuvang chuan BMS chuan an flag lo va, tumahin an en lo.
Chu chu temperature monitoring a ni. Sensors ngei pawh ni lovin. an data pek che chu eng nge tih tur tih chungchanga thutlukna siam.
