Wanem Em i gutpela?

Coolant em ol samting i ran long rot bilong bateri pek bilong yu na dispela i pasim ol sel long kukim ol yet. Pretty simpol konsep be plante pipol oli kasem rong.

Long ol EV na ESS aplikesen mipela i toktok long wanpela glycol-wara miks i raun long ol kol plet o ol kol senel i masin i go insait long pek straksa. Dispela wara i kisim hat long ol sel, karim i go long wanpela chiller o radiator, tromoi hat, kam bek bilong kisim moa. Loop i wok long ran inap long taim dispela pek i wok.

Lusim tingting long wanem samting yu save long en long kolsan bilong ol ka. Dispela grinpela Prestone bilong AutoZone bai bagarapim wanpela bateri pek. Ol korosen inhibita long ol konvensenel antifriz em ol aion kompaun-}'ol i save mekim pawa. Yu ranem hemia tru long wan 400V pek, yu stap askem ol rong blong graon.

Kilant bilong bateri i mas inapim tupela samting ol i mas mekim olsem antifriz oltaim i no save tingim:

Electrical resistivity above 100 kΩ·cm minimum. Most OEMs spec 150 kΩ·cm or higher. Tesla's spec calls for >200 kΩ·cm long fres fil.

Ion konten aninit long 25 ppm. Sampela specs i tok 10 ppm. Dispela em i as na yu no inap yusim wara tasol na miksim bilong yu yet-}long glycol yet i mas ultra-i klinpela.

BASF Glysantin G40 na Arteco Havoline XLC em tupela yu bai lukim planti taim moa long fil. Chevron i mekim tu wanpela betri- spesifik fomulasen. Ol dispela i save ron olsem $40-60 long wan wan galon na $12-15 bilong kisim OAT kolsan oltaim. Mas mekim.

coolant

50/50 ethylene glycol i go long wara i no gat aion em i standet. Sampela man i save ran 60/40 long ol kol klaimet. Go antap long 60% glycol i bagarapim yu tru{-viskositi i go antap, hat trensfe i go daun, pam i wok hat moa.

Matematik bilong frising poin:

50/50 miks i frisim samting olsem -37 digri

60/40 i kisim yu long ating -52 digri

Pure glycol friz long -12 digri (yes, putim wara i daunim fris poin, kemistri i narakain)

Long bighaf blong Not Amerika 50/50 i oraet nomo. Sapos yu wok long putim ol pek long Minnesota o Alberta, toktok wantaim thermal enjinia bilong yu long go maniman moa.

coolant

Hia em ples mi lukim bikpela paul tingting. Ol manmeri long wanem rot i bikpela tumas long ol pam o ol i no bikpela tumas.

Kalkulesen i no kompliketed. Yu mas save long tripela samting: hamas hat dispela pek i save kamapim, wanem tempereja i go antap yu inap karim long olgeta hap bilong seket, na spesifik hat bilong kolsan bilong yu.

Long 50/50 EG/wara miks, spesifik hat em olsem 3.3 kJ/kg·K. Densiti klostu long 1.07 kg/L.

Tok olsem yu gat 75 kWh pek i mekim 2C discharge. Em 150 kW autput. Piksa 5{{6}6% hat jeneresen long dispela mak bilong dispela mak-kolim em 8 kW thermal lod. Sapos yu laik holim inlet-long-autlet delta aninit long 4 digri :

8000 W ÷ (1.07 kg/L × 3300 J/kg·K × 4 K) 60=34 L/min

Em i wanpela namba tru bilong wanpela projek tru. Pump tru mipela i bin spec'd i bin kisim mak bilong 40 L/min bilong givim mipela hetrum.

Planti pasindia EV pek i save ran 8-15 L/min long nomol draiving lod. Bumps up long taim bilong hariap sasim o sastene hai pawa.

Lukim sampela feil mod long ol yia i go pinis.

Rong bilong kolsan taip.Sopim top wantaim ol konvensenel antifriz long taim bilong sevis. Ol spik bilong kondaktiviti. BMS i lukim isolesen asua, pek i pas. Sapos yu laki em i tromoi ol kod tasol. Sapos yu no laki yu kisim intanel acing.

Kontaminesen.kwaliti bilong wara i bikpela samting. Wanpela sait mi wok long en i yusim wara bilong tap bilong namba wan taim bikos "em i wok long go insait long 'deionizer' bilong 'deionizer'." Eksept ol i bin abrusim deionizer. Kloraid konten em 180 ppm. I bin mas flasem ful sistem mo riplesem ol kol plet{{5}$40k wok long wan instalesen blong $200k.

Degredesen ova long taem.Glycol i oksidais. I kamapim glycolic acid, bihain oksalik asit. pH drop. Ol marasin bilong pasim korosen i save kisim yusim. Ol OEM i tok 4-5 yia sevis intavel tasol mi lukim kolsan i go nogut insait long 2-pela yia long ol hai-tem envairomen. Test long olgeta yia.

Air long sistem.Ol lup bilong mekim EV i kol i pinis. Ol poket bilong win i save kamapim ol hot spot. Sel stret aninit long babol i ran 8-10 digri hot moa long ol neiba bilong en. Akselereted ageing, kapasiti i lus, bihain em i wanpela waranti kleim.

Yu nidim tripela mak:

pH-}fresh coolant i ran 7.8 i go long 8.5 i dipen long fomulasen. Aninit long 7.0 i min olsem 'inhibitor' paket i pinis. Senisim.

Resistiviti-}pot mita i stap tasol ol i dia tumas. Sendem wan sample i go long wan lab sapos yu no gat wan. Eni samting anda long 50 kΩ·cm i stap kam smol.

Glycol konsentresen-}refraktomita i wok. $30 tul, i kisim 10-pela seken. Yu stap jekem sapos i gat dilusen long kondensesen o wan we i stap ademap stret wota.

Sampela fleet i save mekim ol stail program bilong skelim oil, salim ol sempel i go long Polaris Labs o Blackstone long olgeta 6-pela mun. Ovakill blong bighaf blong ol aplikesen be i mekem sens blong ol bigfala instalesen.

coolant

Evri samting antap i tekem ol indaerek kol-fluid i ron tru long ol rod, neva tajem ol sel. Em 95% bilong ol samting i stap ausait.

Dairekt imersen i narapela kain. Ol sel i sindaun long wanpela ples waswas bilong wara bilong daunim. No gat ol kol plet, no gat thermal intafes materiel, fluid i kontektim tin stret. Trens bilong hat i gutpela moa. Kompleksiti i daon long sam wei, i hae moa long ol narawan.

Ol wara i narapela kain tu. 3M Novec na Solvay Galden em ol bikpela nem. Ol dispela em ol marasin i gat fluorinet, ol i no save karim planti samting, ol i no inap mekim wok long kemikal. Na tu, em i dia tumas (3}}$300-400 long wan wan lita bilong kisim sampela marasin.

Dairekt imersen i wok long kamap long grid stoa na sampela hai-pefomens kar aplikesen. I no mainstrim yet tasol thermal pefomens i hat long tok pait wantaim.

Kwik refrens blong wanem blong lukluk long hem taem yu stap sosem bateri kolsan:

Paramita	Taget
As	Ethylene glycol, vejin gred
Resisentiviti	>150 kΩ·cm (>100 kΩ··cm minimam)
pH	7.8 - 8.5
Klorait	<25 ppm
Salfet	<25 ppm
Reservem alkaliniti	>3 mL
Fris poin (50/50)	-37 digri o daunbilo
Ol standet i stret wantaim	ASTM D3306, SAE J1034