BEVs

Use this board for general non-cycling-related chat, or to introduce yourself to the forum.

I appreciate the BEV mostly because they...

cost less to run than an equivalent petrol or diesel car
10
12%
are reducing the harm done to our planet and its lifeforms
13
16%
are quiet and smooth
10
12%
can be refuelled with my own renewable energy production
11
13%
can supply energy to the home and Grid
4
5%
No! I am concerned they are just another way of making the car seem acceptable
35
42%
 
Total votes: 83

Biospace
Posts: 2985
Joined: 24 Jun 2019, 12:23pm

Re: BEVs

Post by Biospace »

PDQ Mobile wrote: 11 Dec 2024, 9:12am ^^^
A question for the knowledgable.
Does a degraded battery mean that leccy is being effectively wasted ie the charger still uses it but the battery doesn't absorb it??

Battery gets hot I suppose?
This is a question I posed previously here, it would seem that yes, a with a loss of capacity does 'waste' electricity. I've noticed this with failing phone and tablet batteries in the past, although modes of failure aren't always similar.

I wonder if carbon emissions and such like are calculated using 100% battery capacity?
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Cugel
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Re: BEVs

Post by Cugel »

Biospace wrote: 11 Dec 2024, 1:53pm
PDQ Mobile wrote: 11 Dec 2024, 9:12am ^^^
A question for the knowledgable.
Does a degraded battery mean that leccy is being effectively wasted ie the charger still uses it but the battery doesn't absorb it??

Battery gets hot I suppose?
This is a question I posed previously here, it would seem that yes, a with a loss of capacity does 'waste' electricity. I've noticed this with failing phone and tablet batteries in the past, although modes of failure aren't always similar.

I wonder if carbon emissions and such like are calculated using 100% battery capacity?
Have you got any hard facts from experiments or other data collection procedures oriented at testing energy use/wastage during the charging of various battery types with a varying condition of health?

How did you "notice this" energy charging loss with your phone & tablet batteries? Did you measure anything with a meter of thermometer?
“Practical men who believe themselves to be quite exempt from any intellectual influence are usually the slaves of some defunct economist”.
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853
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Re: BEVs

Post by 853 »

roubaixtuesday wrote: 11 Dec 2024, 12:53pm Globally, 35% of all new cars are BEVs.

Screenshot 2024-12-11 125127.png
The China figures count plug-in hybrids and range extended vehicles in the figures, so are counting ones with an ICE.

https://www.reuters.com/business/autos- ... 024-12-09/
roubaixtuesday
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Joined: 18 Aug 2015, 7:05pm

Re: BEVs

Post by roubaixtuesday »

853 wrote: 11 Dec 2024, 7:23pm
roubaixtuesday wrote: 11 Dec 2024, 12:53pm Globally, 35% of all new cars are BEVs.

Screenshot 2024-12-11 125127.png
The China figures count plug-in hybrids and range extended vehicles in the figures, so are counting ones with an ICE.

https://www.reuters.com/business/autos- ... 024-12-09/
Ah, makes sense, thank you. Figures did seem high
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[XAP]Bob
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Joined: 26 Sep 2008, 4:12pm

Re: BEVs

Post by [XAP]Bob »

Biospace wrote: 11 Dec 2024, 1:53pm I wonder if carbon emissions and such like are calculated using 100% battery capacity?
I look at energy measured from my home, and miles travelled by the car.
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.
Biospace
Posts: 2985
Joined: 24 Jun 2019, 12:23pm

Re: BEVs

Post by Biospace »

Cugel wrote: 11 Dec 2024, 5:04pm
Biospace wrote: 11 Dec 2024, 1:53pm
PDQ Mobile wrote: 11 Dec 2024, 9:12am ^^^
A question for the knowledgable.
Does a degraded battery mean that leccy is being effectively wasted ie the charger still uses it but the battery doesn't absorb it??

Battery gets hot I suppose?
This is a question I posed previously here, it would seem that yes, a with a loss of capacity does 'waste' electricity. I've noticed this with failing phone and tablet batteries in the past, although modes of failure aren't always similar.

I wonder if carbon emissions and such like are calculated using 100% battery capacity?
Have you got any hard facts from experiments or other data collection procedures oriented at testing energy use/wastage during the charging of various battery types with a varying condition of health?

How did you "notice this" energy charging loss with your phone & tablet batteries? Did you measure anything with a meter of thermometer?
How do I notice such things as energy charging losses in aging batteries? Yes, I have metered on occasion, which has demonstrated simple observations that batteries which have reduced capacity waste more energy in charging than ones which have not.

No experience of owning multiple battery powered objects the size of motor cars, however. The forum relied on academic articles when this was discussed previously, this link viewtopic.php?t=155428&start=2085 may help.

See also:

Image
The article notes ∆Q represents amp-hours

https://hal.science/hal-01510765v3/document

Here's an article comparing the two types of battery used in motor cars, https://www.engineering.com/why-ev-manu ... batteries/
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simonineaston
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Re: BEVs

Post by simonineaston »

Biospace wrote: 10 Dec 2023, 12:18pm Public perception changed from considering BEVs as milk floats…
Talking of milk floats, there’s a nice photo essay in today's Graun about dairies / milkmen still working, many of which have progressed onto ‘leccy vans - at least if they’re lucky. I imagine that a float could be a chilly place to work in mid-winter!
https://www.theguardian.com/food/2024/d ... SApp_Other
btw, a question for you experienced electrical engineers out there - what was it that made that distinctive growling sound when a milk float’s electric motors first started up and the float began to accelerate? Modern bevs don't do it, so I image that whatever component was responsible for that very distinctive noise has been superseded by a different design that dispenses with the relevant element. The growl can be clearly heard in the first couple of seconds of this sound effect posted on yt.
https://youtu.be/IVV_ZCoBDUs?si=q5T9Wx6toA8sIcPm
S
(on the look out for Armageddon, on board a Brompton nano & ever-changing Moultons)
UpWrong
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Location: Portsmouth, Hampshire

MG launching semi-solid state battery in 2025

Post by UpWrong »

MG are launching a semi-solid state battery in 2025 and are saying it won't be expensive:
https://electrek.co/2024/12/16/new-semi ... hing-2025/

This will be in a new model, initially. It would be nice if they could offer this as an upgrade/replacement battery for the current MG4. I believe the ESP platform was designed with this in mind.

EDIT: I wonder what the cathode chemistry is. Probably LFP, which would be good.
Carlton green
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Joined: 22 Jun 2019, 12:27pm

Re: MG launching semi-solid state battery in 2025

Post by Carlton green »

UpWrong wrote: 17 Dec 2024, 2:21pm MG are launching a semi-solid state battery in 2025 and are saying it won't be expensive:
https://electrek.co/2024/12/16/new-semi ... hing-2025/

This will be in a new model, initially. It would be nice if they could offer this as an upgrade/replacement battery for the current MG4. I believe the ESP platform was designed with this in mind.
It’s an interesting reflection on the state of the transition to electric powered vehicles; and yet another reason to put off an electric vehicle purchase because whatever technology you buy into today will be clearly superseded - and cheaper too - within just a few years. I think that if you buy a new or second hand electric vehicle now then you have to do so on the basis that it meets your current needs and that you’ve set aside other considerations; that’s easier said than done.

Innovation will come from the Chinese: they’re not as wedded to fossil fuels as the west is (they have to import the stuff and that’s disadvantageous to them), they’ve a relatively vast population, their government is proactive, and they are no longer a (relatively) technologically backward country.

Those countries that were poor due to a lack of fossil fuel resources understand the essential value of (mechanical) power. Those countries that have fossil fuel resources don’t understand that their availability is temporary (a few centuries) and that they support an unsustainable way of life - to be fair I can understand some of the many reasons why.
https://www.energypolicy.columbia.edu/s ... 0China.pdf
Don’t fret, it’s OK to: ride a simple old bike; ride slowly, walk, rest and admire the view; ride off-road; ride in your raincoat; ride by yourself; ride in the dark; and ride one hundred yards or one hundred miles. Your bike and your choices to suit you.
UpWrong
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Location: Portsmouth, Hampshire

Re: MG launching semi-solid state battery in 2025

Post by UpWrong »

Carlton green wrote: 18 Dec 2024, 9:44am
UpWrong wrote: 17 Dec 2024, 2:21pm MG are launching a semi-solid state battery in 2025 and are saying it won't be expensive:
https://electrek.co/2024/12/16/new-semi ... hing-2025/

This will be in a new model, initially. It would be nice if they could offer this as an upgrade/replacement battery for the current MG4. I believe the ESP platform was designed with this in mind.
It’s an interesting reflection on the state of the transition to electric powered vehicles; and yet another reason to put off an electric vehicle purchase because whatever technology you buy into today will be clearly superseded - and cheaper too - within just a few years. I think that if you buy a new or second hand electric vehicle now then you have to do so on the basis that it meets your current needs and that you’ve set aside other considerations; that’s easier said than done.
This (almost) readiness of semi-solid state battery production has caught me by surprise. Having said that, it's not available right now and we don't know the price. The thing is, if it is a big step forward in terms of capacity and charging speed and if the Chinese have a lead on it then they will be able to charge a premium for it, regardless of the manufacturing cost. I guess we'll be relying on the Korean companies Samsung, SK and LG to catch up.

I think the next leap forward in technology will be pivotal if it can be made available at the same price as current batteries.
wheelyhappy99
Posts: 300
Joined: 5 Jul 2020, 11:12am

Re: BEVs

Post by wheelyhappy99 »

Carlton green wrote: 4 Dec 2024, 9:41am
wheelyhappy99 wrote: 3 Dec 2024, 11:49pm Yes, the people who face a really big disincentive to BEVs are those who can't charge at home. Which is why I've been pressing our useless county council to implement on street charging provision at or near domestic tariffs. Lighting columns are almost always on unmetered supplies, with a fixed payment to the utility company based on cheap night time pricing. Just what's needed for BEVs. Reading has lots of older back streets with charging points on street light columns. As I have posted before, 10,000 miles charged at home costs me under £200. So for fortunate people like me who can charge at home the fact that service areas and McDonalds prices are higher per mile than petrol is pretty insignificant. I only need to charge up enough to complete a long journey and get home.
An interesting response above, thank you. (Edit. A bit of a search through your earlier posts gives good data too). It would have been good though to reference the originator of the text that you responded to.

Whether intentional or not what I’ve seen is smoke and mirrors; in all types of commerce companies try to confuse the customer but what’s really frustrating to me is that BEV ‘converts’ too often seem to glaze over any down sides (of BEV’s) and praise the good stuff. In nearly any decision making process one needs to know (virtually) all of the facts and not just (seemingly) cherry picked ones.

10,000 miles for £200 seems like incredible value to me, certainly a better ratio than the (roughly) 300 miles of additional range that I get for £40 of petrol - but it’s nice to have a range of nearly 400 miles. I wonder though what 10,000 miles at 50p per KWh would cost? My estimate for that mileage in a BEV is £1250 (and the 50p rate is around what’s typical for local in street charging), interestingly - though I must check my maths again - that’s about what the petrol would cost me for a similar mileage ((40/300)x10,000 = 1333). These days my annual mileage is relatively low, maybe 5000 miles per year, so there’s not that much to save on my fuel bills - and don’t forget that the (home sourced) electricity still has to be paid for too. (To my estimate, with standard domestic rate electricity and 5000 miles per year, I’d save circa £330 a year on fuel charges - nice, but see below.)

Doing a bit more quick maths a car that does 4 miles per KWh and is charged at the standard domestic rate (not off-peak) of 25p per KWh would cost (circa) £625 for those 10,000 miles. That’s more than the £200 headline price, the reduction is due to you using an off-peak tariff (Octopus, I think), but it’s still a nice saving - it’s effectively ‘half price petrol’, but see the next paragraph :( . If you have an off-peak tariff then electricity used in other parts of the day is charged at a higher tariff than, would be the case, if you only used the standard tariff for the whole of the day (ie. The cost of other usage rises).
https://www.ofgem.gov.uk/energy-price-cap

Just talking money; I’d say that even the best savings on fuel costs (eg. above, about £1000 per 10,000 miles) were relatively unimportant compared to: the depreciation, the risks (of getting either a lemon or something that’s otherwise a poor buy), and the costs of changing a vehicle. That (those) and that the fuel cost savings - if any - are very much dependant on personal circumstances and usage.

Whilst talking about money, don’t forget that external (fitted to your house) BEV charging points cost money too; maybe budget £1500 and hope for some change. Perhaps sticking to a granny charger (13 amp plug and existing socket), at least to start with, makes sense; granny chargers put range on your car at the rate of circa 12 mph and that could be all the home charging rate needed. I’m also concerned about higher insurance premiums too, ‘cause nearly all the electric cars that I’ve found have been in high insurance groups.

IMHO If the Government is serious about BEV’s then it should be focusing its resources on lowering the cost of public charging and not wasting funds on benefit in kind tax relief as applied to luxurious BEV’s (cap such relief and limit relief to BEV’s that are both plain and small).
It’s an interesting reflection on the state of the transition to electric powered vehicles; and yet another reason to put off an electric vehicle purchase because whatever technology you buy into today will be clearly superseded - and cheaper too - within just a few years. I

I've too many other commitments to do more than dip into this forum occasionally, hence the delay in responding.

A few points.

The Octopus tariff gives overnight electricity (at least 6 hours, often 8 or more) at £0.18/kWh less than we paid previously. The uplift for daytime use is +£0.02. We also save by using the washing machine and anything else overnight too. Overall a v good deal for us.

We had a Zappi charger installed for noticeably less than the amount you mention. It will obviously vary depending on the existing incoming supply among other things, and of course the competitiveness of suppliers. I am bemused by the idea that 'sticking to a granny charger to start with' is a good move. The charging rate isn't enough to achieve 80% from 20% overnight. And I'm pretty sure that Octopus only offer the BEV tariff if you have a charging point. I don't know about other suppliers. Also it's worth bearing in mind that ICEs are being phased out. A car charging point will become another service houses are expected to have. Much like TV aerials once were, or more recently, fast broadband.

Any car can be a lemon, ICE or BEV. I bought a Golf estate from a reputable dealer. After a few weeks they picked it up to sort out a v minor issue. The whole tiptronic gearbox and flywheel assembly dismantled itself on their forecourt. (I got a full refund).

I'd like to see more investment in public transport, active travel and cheap public charging too. But if using BIK encourages people who aren't going to use those things and will, otherwise, get their next company ICE Range Rover or similar to get a big BEV instead it's still reducing emissions.

There's certainly a lot of cherry picking in many of the posts on this subject, and indeed home energy. I know people vary in their willingness to adapt to change. But in my view what's often absent is a recognition of the benefits, and need, to do so. We know ICEs and combustible fuels generally cause air pollution. We know air pollution causes ill health, increased NHS costs and many premature deaths. It's often reported that the poorest communities with low levels of car ownership are worst affected.

BEV technology is very likely to improve. Most technologies do. We don't know when solid state batteries or some other improvements will hit the showrooms, or what the price will be. We don't know when an adequate network of ultra rapid chargers will be available for them. We don't know how much network operators will need to spend to create it, or how much they will charge to recoup those costs. Our current car will still meet our requirements in terms of range and charging rate regardless of what comes next.

But we do know that air pollution and climate change are major problems now. Making the current 'good' the enemy of a possible future 'perfect' is, in my view irresponsible. It's the next generations who will have to live with our legacy.
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[XAP]Bob
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Re: BEVs

Post by [XAP]Bob »

Before we had the home battery and solar our split was 51% peak, 49% off peak. That tiny uplift in peak rate was completely wiped out by the off peak usage.
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.
PDQ Mobile
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Joined: 2 Aug 2015, 4:40pm

Re: BEVs

Post by PDQ Mobile »

[XAP]Bob wrote: 19 Dec 2024, 11:49am Before we had the home battery and solar our split was 51% peak, 49% off peak. That tiny uplift in peak rate was completely wiped out by the off peak usage.
And how much did the battery cost?
'Cos if one is a low consumer it's relevant.
djnotts
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Location: Nottingham

Re: BEVs

Post by djnotts »

^ "Talking of milk floats, there’s a nice photo essay in today's Graun about dairies / milkmen still working, many of which have progressed onto ‘leccy vans - at least if they’re lucky. I imagine that a float could be a chilly place to work in mid-winter!"

I used to "drive" a manual one -- walk in front with a tiller which steered and regulated speed. A different driving licence Class now but still on my Licence. Caused excellent traffic jams on the A6 from Hazel Grove heading uphill back to the dairy at the end of the round with a much depleted battery!
If very experienced could sit inside under cover and operate tiller with feet!
Winter was indeed pretty nasty....
djnotts
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Joined: 26 May 2008, 12:51pm
Location: Nottingham

Re: BEVs

Post by djnotts »

^ like this: larger hole at front and we used to carry crates on the roof. The ones with front axles width of body less likely to over turn than those with narrow spaced wheels.
Lewis_Electruk_RVW_732.jpg
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