Re: Practical solutions for extending cold weather range
Posted: Fri Oct 11, 2013 7:24 am
A quote from the article above (sorry for my rapid and poor translation):
One of the first electric car users in Orava county, Rein Kraak, made a statement, that the car is able to drive at -29.5 degrees Celsius up to 76 km and has no problems with starting in frosty conditions.
In fact, he made only a 4 kilometer trip, and the range was estimated only according to the cars guess-o-meter, which showed remaining range at the beginning of the journey as 80 km and as 76 km at the end. There is no information on whether the car heater was turned on or not and so on. But a positive image was created: "The electric car drives well at the minus 30 degrees C".
A day later, the same person told in national broadcasting, that his car could drive about 80 km at -28 degrees. And there's no concern about starting a car in the frost! Just toes will freeze, as you drive!
At the same time, however, newspaper Tartu Postimees wrote that two electric cars had to be towed to the Mitsubishi retailer to warm up the batteries! It turned out that the cars have batteries without heating, and if they are not constantly hanging from the wire, then after quite a short standing in the frost, they will not start anymore. Which information is correct?
Whatcar.ee editorial seeked for answers from a familiar social officer, who testified that he did not believe in claims of the car user from the Orava county: "Cold affects the range very much. When there are warmer days, a fully-charged battery can run up to 70 km , then down to minus 20 degrees in just 40 to 50 km", said the social worker, who drives his iMiev mostly in the city. On the road it would take more energy and mileage probably would be even more scarce.
"I think at cold temperatures, however, the worst problem is that the power steering stops working, " said social worker, who was still not completely certain whether this was an universal problem, or just his cars specific trouble .
But getting the car warm is a completely separate issue. "It warms up still very slow. Such luxury like you start a car and then sliding the warmers slider up to the end (like in regular car), would mean that the warming would half empty the batteries. Just today I finished an experiment: I started the heater in the standing car and let it go. The battery was 80% full at the beginning, but after an hour, it was completely empty. "
There are also problem with charging, because social workers have usually no opportunity to park the car into the warm and safe garage. On the courtyard, there are fears that costly five meter charging cable can be stolen, if left over night unattended. Also, no one asked him to keep a journal about how many kilometers at which temperatures can drive , etc. .