EV (electric vehicle) News & Discussion

Forums › Transport (cars, bikes and boats) › EV (electric vehicle) News & Discussion

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1524 posts

Uber Geek

#2751731 29-Jul-2021 11:52

frankv:

Perhaps you should have looked at the link... this is only 2 months away tops, if the manufacturer has credibility. NB also 1,000km range.

Yeah sure call me back in 2 months.

kingdragonfly

11202 posts

Uber Geek

Subscriber

#2751886 29-Jul-2021 17:04

This is a fanboy video, so if you don't like Tesla, you probably won't like this video.

Are There Any Teslas Left For 2021?

Ryan Shaw

Tesla Record Profit, Yoke Here to Stay, Cybertruck Updates, Model Y in 2021, Teslas sold out through 2021

Batman

Mad Scientist
29766 posts

Uber Geek

Trusted

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#2751938 29-Jul-2021 19:31

I won't worry, there are options aplenty coming soon. But don't know how soon...

RobDickinson

1524 posts

Uber Geek

#2752145 30-Jul-2021 08:01

NZ will have plenty of model 3s for us, we're only a few days of production run form China.

Also model Y is going to be available soon.

kingdragonfly

11202 posts

Uber Geek

Subscriber

#2752745 31-Jul-2021 09:40

Hopefully coming to NZ soon. 82bhp electric motor that's powered by a 36.8kWh battery pack, range winter highway. 225 KM, 140 miles

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RunningMan

8960 posts

Uber Geek

#2752746 31-Jul-2021 09:43

If you want to buy an actual truck

MarkH67

518 posts

Ultimate Geek

#2752880 31-Jul-2021 14:52

I was reading the Herald and came across this: https://www.driven.co.nz/news/what-should-you-look-for-in-an-electric-vehicle/?utm_source=nzh&utm_medium=referral&utm_campaign=triple

It looks like they got several things wrong in this article:

"The bigger the battery, the more expensive the vehicle, and the longer it will take to fully recharge it."

Indeed the bigger batteries add cost to the car, but the time taken to recharge depends on the amount of battery you used since the last charge, rather than the size of the battery. If I commute 72km in a car with a 64kWh battery then my charging after I get home will NOT take longer than the same commute on my 24kWh Leaf. Actually, a newer more efficient car will have used less kWh of battery and therefore charge in less time.

"Everyone wants more range, and many are prepared to pay extra for more of it, but there are penalties such as increased weight and a demand for recharging via visits to often-busy public fast chargers instead of simpler and far more convenient overnight plug-ins at home."

That doesn't sound right. Surely it is the cars with less range that are more likely to need to stop at fast chargers? With a bigger battery you can travel further on the overnight charge at home. I could drive from Morrinsville to Auckland to Morrinsville without needing to stop at a fast charger with a longer range car, but with a smaller battery that trip would necessitate a stop at a fast charger.

"The bigger the battery, the more heat it will generate when driving the BEV"

Is this right? Surely a larger battery would be draining at a lower C rate and therefore running cooler? Driving along draining 20kW would be around 1C rate on my Leaf, but a new Kona with 64kW would only drain around 1/3C at the same 20kW, so it should run cooler. There is also an issue with older Leafs needing to stop and charge so often that the fast charging leads to the battery temperature going up too much, then the car needs to stop and sit for a while so the battery can cool. A car with a bigger battery will have more time between charges, also 50kW is a 2C rate to my Leaf, but would be under 1C rate for a Kona, therefore there should be less heat due to the gentler charging rate.

"This simple battery-cooling solution is why the Leaf can’t have a battery bigger larger than 40kWh."

But isn't there a 62kWh Leaf?

A lot of what is in this article is true enough, but there is definitely some incorrect information there.

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Batman

Mad Scientist
29766 posts

Uber Geek

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Lifetime subscriber

#2752884 31-Jul-2021 14:56

All things being equal that's correct. Say you compare different models of the same line by the same manufacturer that would be true.

gzt

17140 posts

Uber Geek

Lifetime subscriber

#2752885 31-Jul-2021 14:58

Amazon and Rivian redesign package delivery.

RobDickinson

1524 posts

Uber Geek

#2752898 31-Jul-2021 15:31

"The bigger the battery, the more expensive the vehicle, and the longer it will take to fully recharge it."

If charging from a same fixed low kw sure, but larger batteries tend to fast charge faster.

Charging times at home are mostly irrelevant so long as you have enough charge by the time you get in the ca in the morning.

In practice, larger batteries and more efficient cars are faster on road trips. Start with 500km range you dont need to stop on most trips or stop for shorter. A (24kwh) leaf would have had to spend 3 hours charging on the same trip etc

"The bigger the battery, the more heat it will generate when driving the BEV"

I'm unconvinced this is true, I assume they ave no real evidence and some low amount of heat in the pack isnt relevant, its actually needed in winter..

"This simple battery-cooling solution is why the Leaf can’t have a battery bigger larger than 40kWh."

But isn't there a 62kWh Leaf?

Yes. Yes there is. Looks like they had an 'expert' writing that. The env200 has an active cooled pack btw...

RobDickinson

1524 posts

Uber Geek

#2753223 1-Aug-2021 14:38

'Yet still they come, ranting like Mr. Praline about how his parrot wasn’t just tired and shagged out after a prolonged squawk, even though they had never actually bought a Norwegian Blue in the first place.'

https://www.stuff.co.nz/motoring/evs/125677607/what-is-an-ev-like-after-100000km

And yet straight away in the comments they are already piping up...

Obraik

2123 posts

Uber Geek

#2753230 1-Aug-2021 15:08

RobDickinson:

'Yet still they come, ranting like Mr. Praline about how his parrot wasn’t just tired and shagged out after a prolonged squawk, even though they had never actually bought a Norwegian Blue in the first place.'

https://www.stuff.co.nz/motoring/evs/125677607/what-is-an-ev-like-after-100000km

And yet straight away in the comments they are already piping up...

My favourite comment was "To have 100% battery capacity after 100,000Km probably means the previous owner had replaced the battery at some stage. Sorry, but that status does not seem possible otherwise." It's like these people don't even consider that maybe they're the ones who are wrong and they don't know what they're talking about. Even when presented with real world information that shows them they're wrong they double down on being wrong.

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HarmLessSolutions

974 posts

Ultimate Geek

Subscriber

#2753234 1-Aug-2021 15:17

Obraik:

My favourite comment was "To have 100% battery capacity after 100,000Km probably means the previous owner had replaced the battery at some stage. Sorry, but that status does not seem possible otherwise." It's like these people don't even consider that maybe they're the ones who are wrong and they don't know what they're talking about. Even when presented with real world information that shows them they're wrong they double down on being wrong.

Such a contrast from the Herald article referred to a few posts back, even in regard to the Stuff article's author actually having the confidence to put his name to this well considered piece as opposed to yesterday's Herald article having no reference beyond 'By Waka Kotahi'.

https://www.harmlesssolutions.co.nz/

RobDickinson

1524 posts

Uber Geek

#2753235 1-Aug-2021 15:22

Obraik:

My favourite comment was "To have 100% battery capacity after 100,000Km probably means the previous owner had replaced the battery at some stage. Sorry, but that status does not seem possible otherwise." It's like these people don't even consider that maybe they're the ones who are wrong and they don't know what they're talking about. Even when presented with real world information that shows them they're wrong they double down on being wrong.

I'm guessing theres some extra capacity that its chewing through so it will have degraded some, but its obviously fake and they've been swapping out AA's before the test /s

SaltyNZ

8231 posts

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2degrees

Lifetime subscriber

#2753499 2-Aug-2021 09:23

RobDickinson:

I'm guessing theres some extra capacity that its chewing through so it will have degraded some, but its obviously fake and they've been swapping out AA's before the test /s

I would not be shocked if that's what Tesla does - after all, they offer the ability to upgrade your range via an over-the-air update to the car, and bits don't magically make new batteries appear out of thin air. But there's nothing new about that. Disk drive manufacturers have been doing that for decades to improve the reliability (and also speed, in the case of SSDs) of their drives, and every form of error correction is fundamentally the use of some hidden extra capacity.

In the case of batteries, you're trading some initial extra range for a guaranteed longer life with a reliably steady range. It makes sense to me.

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