News for hackers. Stuff that matters.
Re:Hydrogen fuel cell cars (2020) by jackthezipper on Monday July 05, 2021 @08:09AM (#27737100)
While inefficiency is indeed a problem, I feel like a lot of people overlook the one huge pro hydrogen has over batteries, namely charging time. Of course this might not be important for the daily commute, or 99% of the vehicles' use. But for that remaining 1% it _is_ a huge deal. And most people buy cars to fulfill a 100% of their needs, not 99%.

Now I should say, I know basically nothing about battery tech. But unless full charging time can be greatly reduced, by which I mean under 5 or at most 10 minutes, I still feel hydrogen could have the upper hand even if it is more expensive and less efficient.

Re:Hydrogen fuel cell cars (2020) by theluketaylor on Monday July 05, 2021 @09:02AM (#27737507)
For passenger vehicle road trips charging time is already into "doesn't matter" territory for a number of models. I have taken a 1000 km+ trip in a BEV that I used to take in gas vehicles. We didn't have to stop more often or stay any longer than we would have with gasoline.

Really think about the time you spend stationary when stopping for fuel on a road trip. It's not just pumping fuel, you also go to the bathroom, get some food, and stretch your legs.

Extremely fast charging a Tesla trick, Hyundai Ionic 5 (starting around 45K before incentives) can charge 10-80% in 18 minutes, which is enough to travel around 330 km. That's roughly 3 hours of driving in most counties.

I could see hydrogen making sense for fleets with local operation that need to be operated nearly 24x7, like the support vehicles at an airport, city busses, and taxis in cities with strong night life. It also makes sense for heavy industry. Doesn't make sense for passenger vehicles; the cost of batteries has crashed too far and the power grid is way too ubiquitous.

Re:Hydrogen fuel cell cars (2020) by jackthezipper on Monday July 05, 2021 @11:11AM (#27738768)
>Extremely fast charging [...] can charge 10-80% in 18 minutes, which is enough to travel around 330 km. That's roughly 3 hours of driving in most counties.

This is not very impressive, and exactly where I see hydrogen have the upper hand. I suppose it's a matter of opinion, but _having_ to stop for 20 minutes every 3 hours isn't ideal at all for me.

Re:Hydrogen fuel cell cars (2020) by iamthemonster on Monday July 05, 2021 @11:30AM (#27738959)
Bloody hell, how much non-stop driving are you doing? If you're driving a solid 12 hours a day, that is only three 18-minute breaks, one of which is your lunch break.
Re:Hydrogen fuel cell cars (2020) by jackthezipper on Monday July 05, 2021 @12:00PM (#27739272)
>that is only three 18-minute breaks

Those are three _mandatory_ breaks, that add up to almost an hour, in ideal circumstances. To answer your question, not a whole lot, but in that 1% 6 hour drives aren't uncommon at all.

Re:Hydrogen fuel cell cars (2020) by nickik on Monday July 05, 2021 @12:27PM (#27739560)
You are the outlier of the outlier. And if you plan it well, EV charge actually faster in the lower 50%.

So if you really want to optimize you can actually do it with shorter 10 min stops. Check out Kyle from inside EV.

And until you can seriously deploy Hydrogen vehicles, it would be a few years down the road. Until then the next generation of battery an charging will be significantly faster already.

Practically speaking most people simply don't drive like that, people need to eat, pie and so on. With an EV you simply stop at a charger do all the things and go back. That usually takes 10ish minutes.

And to be honest, every road trip with at least on other person usually means a break every 3h anyway.

And even more in a day to day application, most people charge over night, so never having to go to a station and having a short break every few hours is vastly preferable to having to constantly go to the hydrogen station.

Of course hydrogen would also be significantly more expensive.

All in all, it simply doesn't make practical sense to optimize everything for this one specific thing.

Re:Hydrogen fuel cell cars (2020) by jackthezipper on Monday July 05, 2021 @01:48PM (#27740218)
>You are the outlier of the outlier.

I don't think I am. Camping vacations in Europe are very common. 1500 km in two days really isn't as uncommon as you might think. For clarity, I'm not saying it can't be done with an EV, I'm just saying the relatively many, long, mandatory breaks aren't nearly as convenient as the relatively few short ones that regular cars, and perhaps in the future, hydrogen cars, offer.

And again, taking a quick break to stretch your legs a bit, is not the same as needing to take a 20 minute break in order to be able to continue your journey. This might seem like a small detail but I really don't think it is.

Re:Hydrogen fuel cell cars (2020) by nickik on Tuesday July 06, 2021 @05:29AM (#27745971)
If you have children you need to stop more often period. Even most woman that I have traveled with actually want to stop far more often. Sure, with a bunch of guys driving to Italy we might go 3-4 hours non stop but that is as I pointed the exception.

I have traveled threw Europe all my life and the idea that 15-20min stops every few hours are a major deal-breaker is just nonsense. You want to pie, you want to eat, you want to go to the shop and get some drinks.

Simply stopping, plugging in, going to pie, get a drink in the shop and stretching your legs for 5min already adds enough to drive another couple hours.

And even if you are a case, where you really are driving like that, 1-2 times a year where you do journey like that the extra 30min you spend on the journey are really not the end of the world. I honestly can not describe it any other way then a small detail that wouldn't matter to the waste majority of people.

And even if that is still a problem, a few years from now batteries will be better, charging will be even faster and density will be higher. Hydrogen would not be the right answer.

Re:Hydrogen fuel cell cars (2020) by theluketaylor on Monday July 05, 2021 @02:11PM (#27740456)
If you're taking a family camping vacation every time you stop the car it's going to be a 15-20 minute minimum stop by the time everyone climbs out, goes to the bathroom, and gets loaded back in. I don't believe you can transport 3 or more people without needing to stop at least once every 3-4 hours.

Here in Canada things are way, way further apart than Europe and car travel to vacation is often many hours or days apart. I have taken a number of EV road trips and I have not had to stop more often or stay longer than I would have in a gas car. Charging speeds and range are only getting better, but they are already well into low/no impact territory.

Re:Hydrogen fuel cell cars (2020) by jackthezipper on Monday July 05, 2021 @02:52PM (#27740814)
> I don't believe you can transport 3 or more people without needing to stop at least once every 3-4 hours.

Okay. I can, and do so a few times a year. Also, the 3/4 hours people keep referring to, is that in a fully loaded car pulling a caravan while occasionally driving through mountain ranges with an average speed of 100 km/h?

And for the last time, wanting to take a 20 minute break is different from having to. We often postpone/skip planned breaks in order to stay ahead of rush hour, or to reach the campsite before closing time, just to name two common reasons. Mandatory 20 minute breaks greatly reduce your freedom while traveling. No matter how little of a problem this is for you personally.

Re:Hydrogen fuel cell cars (2020) by nickik on Tuesday July 06, 2021 @05:36AM (#27746023)
Again you just keep adding more and more stuff to defend your concept and it applies to fewer and fewer people.

The waste majority, 99.9something people will never drive with a caravan and most don't go threw the mountains.

You simply need to accept that you are representing an expedition, this has been studded. Most cars only very, very rarely do long travel at all. And when they do they don't do it very often. And when they do they stop reasonably often anyway.

You can simply accept that an EV is not for you for the moment because you are apparently a special case. Most people don't stop wanting to pie so they can beat rush hour to a campsite. That is simply not the case for 99.9999% of miles driven.

Re:Hydrogen fuel cell cars (2020) by jackthezipper on Tuesday July 06, 2021 @09:28AM (#27748221)
>Most cars only very, very rarely do long travel at all. And when they do they don't do it very often.

I agree, and this is what I said in my first post. My entire point is that, for most people, a car needs to meet _all_ needs, not 99% of them. Don't get me wrong, EV's are a great step forward, but perhaps hydrogen can solve some problems EV's can not. They might very well introduce more problems than they solve, fair enough. But it seems silly to just brush off possible solutions in favour of an incomplete one. Yet this is what happens every time hydrogen gets mentioned.

>And when they do they stop reasonably often anyway.

You are ignoring the optional vs mandatory difference. Whether it's a problem for you or me personally is irrelevant, the fact is it limits your freedom considerably.

Re:Hydrogen fuel cell cars (2020) by aidenn0 on Monday July 05, 2021 @10:08AM (#27738156)
It definitely takes longer west of the Mississippi river in the US. Mountains with 80MPH (130 km/h) speed limits mean the range is far shorter than typical freeway diving, which makes the fact that you need to stop more often, and for longer (gas cars have a typical 330 mile range, 1 l.6 longer than that Ionic), really add up.

[edit]

I will soon be diving 1600km. Google suggests the route will take 14h. I expect to make it in 15. Friends with Teslas suggest it would take nearly 20.

Re:Hydrogen fuel cell cars (2020) by donkeyd on Monday July 05, 2021 @11:16AM (#27738812)
> I will soon be diving 1600km. Google suggests the route will take 14h. I expect to make it in 15. Friends with Teslas suggest it would take nearly 20.

Google doesn't account for stops required for toilet breaks, eating and drinking. Of course, you can just not drink, so you don't have to pee. You can eat while driving even though that's isn't a good idea from a safety standpoint. You can skip taking any breaks and get tired, which is also a bad idea from a safety standpoint.

It also depends on the available charging infrastructure, of which I have no clue at your destination.

In my own experience with driving about 1200 km with regular breaks, it took about an hour longer than it did with my diesel. It just took more planning. Most times, a charging stop meant peeing, drinking a coffee and then the car would be finished charging. The biggest issue was that some chargers aren't near a rest stop.

Re:Hydrogen fuel cell cars (2020) by theluketaylor on Monday July 05, 2021 @12:42PM (#27739704)
1600 km in 15 hr is borderline irresponsible driving. Depending on speed limits as there simply isn't enough rest time to ensure you are focused on driving.

The EV cannonball record was set this winter in a Porsche Taycan at 44 hrs 26 minutes and that included some charger trouble and much less than ideal temperatures. Google's estimate for that route is 42 hours without any stops of any kind.

Here is a route plan for Lincoln, NB to Las Vegas NV. 1989 km with 17:43 driving and 2:29 charging for just over 20 hours total. That's an extra 400 km covered from your rough estimate and includes going up and over some pretty serious mountains.

https://abetterrouteplanner.com/?plan_uuid=71dfd1e1-a134-46c...

Re:Hydrogen fuel cell cars (2020) by aidenn0 on Monday July 05, 2021 @05:51PM (#27742159)
> 1600 km in 15 hr is borderline irresponsible driving. Depending on speed limits as there simply isn't enough rest time to ensure you are focused on driving.

2 drivers.

Re:Hydrogen fuel cell cars (2020) by wazoox on Monday July 05, 2021 @10:51AM (#27738545)
Driving at the fastest allowed speed for long duration isn't a good bet with BEV. Usually you'll get shorter trip time by driving at 110km/h and skipping a charge.
Re:Hydrogen fuel cell cars (2020) by theluketaylor on Monday July 05, 2021 @01:00PM (#27739847)
It depends on the charge curve for the car. For the fastest charging cars it's better to keep the battery in the bottom half (where it charges faster) and charge more often in very short stints.
Re:Hydrogen fuel cell cars (2020) by GordonS on Monday July 05, 2021 @01:20PM (#27739976)
> We didn't have to stop more often or stay any longer than we would have with gasoline.

A serious question from someone who knows little about electric cars, and who still thought it would take anywhere between 30-240 minutes to charge, depending on charger type - can electric cars really now charge faster than the < 180 seconds I'd spend refilling with petrol/diesel?

If so, I think the industry needs to make more noise about this, to make it more know.

Re:Hydrogen fuel cell cars (2020) by garyrichardson on Monday July 05, 2021 @01:56PM (#27740317)
I own the 400km range model 3. I can tell you that you’re comparing apples and oranges.

Over the course of the 50 weeks of a year that I don’t take it on long trips I spend 0 seconds waiting for a charge. I plug it in at night and it’s always full in the morning. A typical errand running day for me is 200+ km and I have more than enough range for that.

The one or two times I take it on a road trip I usually time it with pee breaks and filling my self with coffee.

Net/net I spend less time over all waiting to refuel my car.

Yes, of course this depends on me having a place to plug it in at night.

Re:Hydrogen fuel cell cars (2020) by theluketaylor on Monday July 05, 2021 @02:23PM (#27740560)
I'm talking about total stop time. Pumping gas is an active task you have to be present for whereas charging isn't.

I roll into a charger and plug in, then immediately head to the bathroom. Grab food if it's a lunch or snack break. Walk around to stretch my legs. By the time I'm ready to go so is the car.

When pumping gas I can't leave the pump unattended, so bathroom time gets added on top of refuel time. With charging the car is adding range no matter what task I happen to be doing while the car is stationary.

The other charge need is daily use. Charging at home is a game changer that absolutely beats gas pumps. It takes me 10 seconds to plug in as I leave the garage. I wake up to a full "tank" every single morning. Daily errands cannot possibly use up my 400 km range, so I never have to think about charge unless I'm on a road trip.

Re:Hydrogen fuel cell cars (2020) by GordonS on Monday July 05, 2021 @04:38PM (#27741607)
> The other charge need is daily use. Charging at home...

Within reason, this seems like it would be a good tradeoff for many people.

Say you're on a rare long journey and need to stop and charge - minutes-wise how long are we talking about?

Re:Hydrogen fuel cell cars (2020) by theluketaylor on Monday July 05, 2021 @05:19PM (#27741919)
Not long. My most common road trip is about 720 km one way and doesn't have a lot of destination charging. I stop 3 times on the way up:

* 5 minutes to get synced up with the distance between chargers (it's a very rural route; on more major routes you have plenty of choice about where to stop)

* 20 minutes

* 15 minutes to make sure I can make it back to the charging network since my destination is super rural.

I have made that same journey to visit family many times in a gas car and we stop in the exact same places for pretty much exactly the same amount of time. The first one is in the town my grandmother lives in, so we'd have stopped to say hello anyway. The 2nd is where we have always stop for a meal. The 3rd stop is where we always take a bathroom break.

https://abetterrouteplanner.com

Select a car and enter a route. It will be a pretty accurate picture of the necessary charging. You can play with things like temperature, arrival and departure charge state, and load.

Re:Hydrogen fuel cell cars (2020) by epistasis on Monday July 05, 2021 @08:48AM (#27737408)
I don't think the difference between 10 and 15 minutes is enough to cause a huge problem in those 1% of situations. There are a lot of happy EV customers that go on multi-day road trips, just as they would in a gas car, without issue. I'm one of them, and will never go back to a fuel based car.

That extra five minutes on road trips is far far far less than the amount of extra time that has cars take day to day, needing to stop at gas stations rather than get plugged in at the garage. The tradeoff is hugely in EVs favor, IMHO.

Re:Hydrogen fuel cell cars (2020) by drewg123 on Monday July 05, 2021 @09:56AM (#27738028)
I've taken multiple ~1000mi road trips in my Tesla. Charging typically adds ~2 hours to such a trip (14hrs -> 16+ hrs). I'm an "eat in the car and stop only for fuel" road tripper, so a ~30-40 minute stop every ~2-3 hours is far worse than an 3-5min stop every 4-5 hours.

What's especially frustrating is what happens when I arrive at my destination, where I don't have access to charging and the nearest Tesla supercharger is an "urban" charger with 72Kw max. I'll typically pull into that charger between 1 and 2am and spend nearly an hour there to get the car up to 80% so that I have a charge for trips during the week. The last thing I want to be doing then is sitting in an empty parking garage, waiting for my car to charge when I just want to get some sleep in my bed. I'd love to have a quick refueling option.

Re:Hydrogen fuel cell cars (2020) by jsight on Monday July 05, 2021 @10:53AM (#27738576)
I know what you mean there. Destination charging is currently the biggest weakness in the EV world, IMO. I'd love for every hotel and tourist destination to have L2 charging.
Re:Hydrogen fuel cell cars (2020) by drewg123 on Monday July 05, 2021 @11:13AM (#27738793)
The most frustrating thing is that my destination is a friend's urban condo. They share a parking garage and valet with a hotel. There are destination chargers, and the valet will charge your car for you. But only if you're a hotel guest; the chargers are not available to condo residents.
Re:Hydrogen fuel cell cars (2020) by jsight on Thursday July 08, 2021 @10:21AM (#27772283)
IMO, this is why it is important to make billing more common. It doesn't make sense to keep them from the condo users if they could generate revenue from them.

I feel like the risk of freeloaders keeps hotels from installing more of them too.

Re:Hydrogen fuel cell cars (2020) by krzyk on Monday July 05, 2021 @09:21AM (#27737683)
> I don't think the difference between 10 and 15 minutes is enough to cause a huge problem

"Charging" with gasoline is like 2 minutes. With electricity AFAIR it is more like 30 minutes (in case of fast charger or longer in case of ordinary one).

The time difference is huge (e.g. if you travel with kids, every minute counts).

E.g. vacation travel in Poland from south to north (very popular during vacation) takes ~8h (depending where you start), during that time I need to tank gas twice, EV would need at least 2-4 times, this would increase travel time by 1-2h.

Re:Hydrogen fuel cell cars (2020) by eptcyka on Monday July 05, 2021 @09:52AM (#27737982)
I recently made a trip through Poland, and, starting with a full tank of gas, I only needed to refuel the car once. But we still made 3 stops on the way, each being longer than 30 minutes. That's plenty of time to recharge an electric car. I think the issue would be that we'd never make it if all of the cars on the road were electric - a petrol pump can service far more cars hour than a tesla super charger.
Re:Hydrogen fuel cell cars (2020) by krzyk on Tuesday July 06, 2021 @02:27AM (#27744842)
OK, it depends on how/why you travel.

E.g. I do cross-Poland travel only to get from the mountains to the sea. And I have two small children -> they best travel when they are asleep -> travel during night.

My car has small tank, so I have to tank twice on the ~700km trip, and in the night it takes literally up to 3 minutes to tank and pay for it.

If I would use an EV (which I would like, very much, but they are prohibitively expensive here, I mean they cost 2-3x normal car) I would probably need to tank every 200-300km, so it would make 2-3 stops that last 30 mins (and that is assuming given gas station has EV charging, if not then I would need to borrow power from someone else and do charging for ~8h from a normal wall socket).

And this is considering that I use teslas superchargers, all other last longer than 30 mins. Not to mention if there is a queue to the chargers (fortunately at night it is not likely), if you have bad luck you would need to wait 30mins for the person before you and 30mins for your own charging - that makes it completely unsable for anyone.

Re:Hydrogen fuel cell cars (2020) by bzzzt on Monday July 05, 2021 @09:55AM (#27738012)
Because hydrogen has to be pumped at 700 bar there's a delay when the pump buffer has to be recompressed. This will happen after 1 or 2 cars have filled up, the third will have to wait for 20-30 minutes. Not that different from charging an EV...
Re:Hydrogen fuel cell cars (2020) by ortusdux on Monday July 05, 2021 @02:56PM (#27740846)
Tesla did have quick (90s) battery swap capabilities, but it has been abandoned. I would imagine the logistics of managing the batteries would be a headache considering they degrade with use and represent ~1/3rd of the value of car. My best guess is that it was a precaution in case battery longevity was worse than expected. That, or it was solely a way to get several hundred million in tax credits from California.

If production ever hits a point where it is not battery supply constrained, I could see tesla offering a battery insurance pool system with swapping capabilities, were they pull any pack under ~85% capacity and turn it into a power wall.

https://www.youtube.com/watch?v=S0-sHtlCZ7M

https://insideevs.com/news/329836/tesla-battery-swap-locatio...

https://www.csmonitor.com/Business/In-Gear/2015/0312/Tesla-b...

Re:Hydrogen fuel cell cars (2020) by jsight on Monday July 05, 2021 @10:45AM (#27738506)
You aren't wrong, but it still leaves Hydrogen in a weird place in the market.

With gasoline, you have to go weekly for your regularly commute. It can be annoying, but the upside is that you only have to stop for 5 minutes on a long trip!

With EVs, you just charge at home or the office which is really convenient. But the downside, is that those 5 minute stops become 25+ minute stops and you typically have at least 1 more of them. On top of that, the locations aren't as prevalent which increases planning needs.

With Hydrogen, you get the negative of weekly stopping, the negative of fewer locations, and the only benefit is that it can be refilled... almost as well as a gasoline for about the same $$.

So why would I choose hydrogen over either other choice?

Re:Hydrogen fuel cell cars (2020) by theshrike79 on Monday July 05, 2021 @11:24AM (#27738877)
The Toyota Mirai consumes about 1kg of hydrogen per 100km. In Germany, the government subsidised price for hydrogen is 9.50€/kg.

That’s expensive as all hell.

With hydrogen you get: fast refuels (if the station has pressurized itself after the last customer), good range, but the cost is redonculous and the distribution is nonexistent in most countries.

There are more Teslas in space than there are publicly available hydrogen refueling stations in Finland :D

Re:Hydrogen fuel cell cars (2020) by mullingitover on Monday July 05, 2021 @08:24PM (#27743108)
> Of course this might not be important for the daily commute, or 99% of the vehicles' use. But for that remaining 1% it _is_ a huge deal.

That 1% use case should be priced for the externalities.

I'd like to see electric vehicle purchases heavily subsidized by taxes on fossil fuel vehicles and taxes on gasoline. If you really need to pollute 100% of the time you're operating your vehicle just in case you need that extra 1%, it should be priced in a way that really makes you think hard about that 1% scenario and whether there are really no alternatives.

Re:Hydrogen fuel cell cars (2020) by giobox on Monday July 05, 2021 @03:46PM (#27741235)
Have you seen a hydrogen pump in real life? While yes, it can be faster than a 20 minute fast charge, it is a significantly more complex process than gasoline - it doesn’t just pour out the end of a hose as a stable liquid.

I actually think a lot of people will prefer a 10-20 min fast charge on a BEV (I certainly do). Due to the volatile nature of hydrogen I can’t imagine many places will let you run to the toilet or get a coffee while pumping either; these are all just fine to do with fast charging.

For me the choice between BEV and the alternates is more about availability of home charging - if you can wake up each day with reliably ~250 miles of range already in the car, you virtually never need to fill up/charge on the road anyway!

Re:Hydrogen fuel cell cars (2020) by pcurve on Monday July 05, 2021 @11:58AM (#27739244)
By law you have to take 30minute break after 8 hours. And you cannot drive more than 14 hours per day. Iirc Tesla semi can get 400mi from 30 minute. If they can up that figure to 600, then fuel cells range and competitive advantages diminish greatly.

But when you have near autonomous truck that runs closer to 24 hours per day or have a co driver in cab splitting duty then fuel cell will have an edge