Surprise-surprise
Feb. 7th, 2019 02:24 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
ny_quant
A new AAA study finds that when the thermometer dropped to 20 degrees Fahrenheit, range fell by an average of 41 percent on the five models it tested… Some EV drivers recently found that range can drop by half when the mercury tumbles into negative territory.
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Date: 2019-02-07 10:38 pm (UTC)В Массачусетсе зимой не поводишь :)
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Date: 2019-02-07 11:21 pm (UTC)Другое дело, что это легко решаемая инженерная проблема -- электрический подогрев батарей и усё в шоколаде.
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Date: 2019-02-08 06:00 am (UTC)Наоборот, потери емкости от утечек (т е обычная потеря зарядки со временем у неработающих батареек) на холоде меньше, чем в тепле. Т е если у вас возможность зарядить батарейку только сегодня, а понадобится она дней через 5, то лучше ее держать в холодильнике.
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Date: 2019-02-07 11:26 pm (UTC)Скорее всего они включили обогрев на максимум, постояли полчаса в пробках проехав миль пять, а потом пересчитали все на полный пробег. бег.
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Date: 2019-02-08 12:35 am (UTC)no subject
Date: 2019-02-08 12:56 am (UTC)no subject
Date: 2019-02-08 11:59 am (UTC)no subject
Date: 2019-02-08 03:46 pm (UTC)no subject
Date: 2019-02-08 03:59 pm (UTC)no subject
Date: 2019-02-08 04:13 pm (UTC)no subject
Date: 2019-02-08 04:56 pm (UTC)no subject
Date: 2019-02-08 05:14 pm (UTC)До того как жыдь в домике 90 м, я имел удовольствие испробовать жизнь в бытовке, около 14 м (6х3х2,4м). Утеплена она не так чтобы совсем погано (10 см пенопласта в стенах, 15 см крыша и пол), но криворуко и технически неграмотно. Но всё же, думаю, гораздо лучше чем тесла. И площадь поверхности уже не на два порядка больше, и ветром скоростью 90 кмч её не обдувало. Но в минус 15-20 по Цельсию при потребляемой мощности 2 квт было несколько некомфортно. 3 квт наверное хватило бы.
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Date: 2019-02-08 04:53 pm (UTC)no subject
Date: 2019-02-08 12:36 am (UTC)There are several reasons the range decreases:
1. Cold battery is not efficient and pre-conditioning (warming it up) takes energy.
2. Heater use.
3. The actual range loss.
(3) is much smaller than 40% and the other two are relatively small on longer trips where range makes a difference.
no subject
Date: 2019-02-08 02:24 am (UTC)Откуда это известно?
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Date: 2019-02-08 02:27 am (UTC)no subject
Date: 2019-02-08 04:03 am (UTC)Must be true then
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Date: 2019-02-08 04:25 am (UTC)What is exactly your question? These are pretty basic facts about EV's. I don't have an exact analysis with full breakdown depending on your usage pattern. I am sure you can find them if you search online.
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Date: 2019-02-08 06:23 pm (UTC)no subject
Date: 2019-02-08 06:50 pm (UTC)There is no opinion here. Those are facts. The study seems to confuse different sources of energy drain. Your actual range depends greatly on your usage profile, if you are simply driving on a highway it will be much closer to the rated range (see the link I gave you).
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Date: 2019-02-08 07:43 pm (UTC)How so?
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Date: 2019-02-08 07:22 am (UTC)33% loss of range in much colder weather + snow on the ground.
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Date: 2019-02-08 06:25 pm (UTC)no subject
Date: 2019-02-08 06:51 pm (UTC)Are you saying that the car must drive close to its rated range under _any_ conditions? That is physically impossible and not true for ICE cars either.
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Date: 2019-02-08 07:22 pm (UTC)No, I'm not saying this. IC engines powered cars also don't but it's much less of a problem for obvious reasons.
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Date: 2019-02-08 08:33 pm (UTC)Everything depends on your usage pattern. If you are charging at home or at work, the range loss on a daily basis can be significant, but is not something you notice at all (at least with a reasonably long-range EV, such as Tesla or Bolt) (I suppose there are a few people commuting >200 miles daily for whom it is an issue).
If you do not have a place to charge during the day or overnight, the range loss can be a serious inconvenience.
Finally, if you are driving long distance, the expected range loss is typically smaller than what they report (perhaps ~20-30% in cold weather with heater on, depending on conditions). However one has to be aware of it and plan accordingly. That is the usage where EV is most difference from ICE cars.
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Date: 2019-02-08 06:04 am (UTC)Вот и еще одна причина.
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Date: 2019-02-08 06:24 am (UTC)no subject
Date: 2019-02-08 06:50 am (UTC)no subject
Date: 2019-02-08 04:57 pm (UTC)no subject
Date: 2019-02-08 06:31 pm (UTC)The reason is, if in the summertime the battery is discharged to 100% A and 0% B (ideally), in the cold it stops working at about, say, 75% A and 25% B. So, if you warm up the battery, it can go on discharging to 0% B, but in the cold it just stops working when not completely discharged. However, this also means you need to convert only 75% A back into B, not 100% A, when you recharge the battery again.
Thus, in the wintertime you have to recharge the battery more often but every time you are recharging you use less energy. This leaves the same reasons to use more energy in winter as with the combustion engine vehicles.
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Date: 2019-02-08 04:15 pm (UTC)no subject
Date: 2019-02-08 04:56 pm (UTC)дураку стеклянный хуй
Date: 2019-02-08 03:18 pm (UTC)no subject
Date: 2019-02-09 07:06 am (UTC)Стал читать комментарии -- что-то не то.