Elbilforum.no
Bilmerker => Tesla => Model Y => Emne startet av: trondhla på søndag 24. oktober 2021, klokken 13:06
Nå som vinteren er her (har hatt -15C allerede), er det noe redusert rekkevidde å spore ved lav temperatur? Dette var noe av argumentene mot LFP batteriene, men muligens kunne Tesla motvirke dette med god temperaturstyring.
Model Y LR doesn't have LFP. Only Model 3 SR+ has LFP right now.
Either way. You always have to expect less range on cold winter days, as you will consume more energy in heating up the battery pack and cabin.
Bad road conditions is another factor that reduces range due to traction assist, osv.
This is no different than fossil cars that consume up to 30-40% more fuel as well on very cold winter days.
PS. The worst range reduction happens when doing short trips in winter, as the battery pack never gets the chance to warm up enough and this will really increase your energy consumption significantly.
On long trips however, after your first Supercharger stop, both cabin and battery pack are at temperature and then when the roads conditions are not too bad, you will not see that much more energy consumption overall.
Sitat fra: Jeronan på søndag 24. oktober 2021, klokken 16:57
This is no different than fossil cars that consume up to 30-40% more fuel as well on very cold winter days.
The range decrease in electric cars is quite different from the range decrease for fossil cars in winter.
First of all, in fossil cars the heating of the engine and cabin are "free" as the engine produces waste heat and all they need is a fan and a water pump to utilize that heat. Electric motors are 90+% efficient and produce little heat, so the cars need to use a lot of extra energy for heat.
Secondly, because electric motors are so efficient if there is a need for increased power, for instance if there is snow or rain on the ground, wind, higher speed, heavier load, etc, the increase in "fuel" that the engine needs is directly proportional to the amount of extra power needed. In fossil cars the engine is very inefficient at close to idle and under low load, but gets increasingly efficient at higher rpms and at higher load, meaning the increase in fuel needed is less than the increase in power needed.
Therefore electric vehicles have a significantly higher increase in consumption (or decrease in range) than fossil cars do in cold weather, snow, rain, wind, etc.
Det er helt feil det meste du skriver der. Hovedproblemet er kulde som krever masse energi ved oppvarming av kupe. ICE biler lager varme grunnet kun 25-40% effektivitet, hvilket betydde at for hver mil du kjørte, ble det produsert 5kwt med energi som kunne varme. At diesel biler halverte rekkevidden sin i kulda er feil, litt redusert effektivitet første milen kanskje, deretter som normalt. Elbil har en stor svakhet i kulda, noe annet er vare misvisende å si. Med litt forberedelser og forvarming går det allikevel greit.
Lufttettheten, og dermed luftmotstanden er ca. 18% høyere ved -25C i forhold til ved +25C. Det har endel å si, ihvertfall i motorveihastigeter.