MME Charging Curve Data Collection

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ajmartineau

ajmartineau

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Do you think a recommendation suggesting that you do not DCFC over 80% too often will become Ford's position and they will hard limit a 100 KWh pack to only provide 70 KWh usable? Poor standard range. I think you are joking correct?

It has already deviated from historical understand and 94 KWh usable (my original assumption) went to 88 KWh usable. That has been advertised and is in peoples sales agreements. Guess we need to understand Fords definition of usable. Not suppose to (too often) and prevented from doing it are two different things with the latter again really not common historical understanding. You would think if that is where Ford is going to hang their hat than legally they should spit it out instead of putting out feelers. Bet that would not go over well in the real world (may be OK here). You should not red line a mustang so we installed a governor that limits rpm to only 70% ?.
I agree that the 80% 12kW cliff should be starting at 90% (80% of the 99kWh total). There are a few trials I want to try on the battery, such as plugging in at 85%. Can we trick the BMS?
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Marcel

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I would like to have the ability to choose how aggressively the BMS regulates the battery. Do I want to spend the kW's to heat or cool the battery actively to charge super fast or passively to accept cold-gate/rapid-gate of the battery? They could add a slider on the charging screen. For economical charging or speedy charging. Also for on-demand battery pre-heating. And add every possible charger on PlugShare as a destination with an option to pre-heat.

Where did the charging curve come from?
Sorry, could not find it...

https://www.tu.no/artikler/vinterte...vaert-lovende-start-pa-tidenes-elbilar/505337
 

SnBGC

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Those are well over 16 months old. Has there been any more recent news/opinions/etc. re: Chargepoint & P&C?
ChargePoint appears to be forging ahead and blazing their own path. With 75% market share, they can pretty much decide how they want to run their business. The things they can do with software is incredible. So far advanced compared to every one else that I have worked with so far.

I cant really get into specifics unfortunately because it is proprietary information.....and I am still learning myself. By end of Feb, our firm will be certified with EVSE mechanical and software installations. Which is a very hard certification to get because the software connects with the electrical grid.

This is probably why they cant use Plug and Charge because the security needs to be MUCH more secure because the utility companies are super secure for national security reasons.

The EA stations are not set up the same way. From what I can tell, they are pretty much an appliance fixture. Not even close to what ChargePoint and other leading manufacturers are doing.
 

generaltso

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This is probably why they cant use Plug and Charge
I‘m actually totally fine with ChargePoint not supporting Plug and Charge. Before the pandemic, I used a ChargePoint commercial station at work every day. It was literally as simple as tapping my watch on the station before plugging in. You don’t even have to select the app first.
 

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I just read the article it came from in the other thread. Good to confirm it started cold. But 22 minutes to warm up is a lot longer than I would have hoped with high power running through it.

But from a practical sense, I'm not worried about DCFC charging a car that's been sitting in the cold overnight. I'm concerned about charging between legs of a road trip, where I just pulled off the highway from 2 hours driving the last leg. It's unclear what that will be like. Hopefully not AS slow to warm up since the battery and circuitry was in use.
And when you program your route.....the car will ask if you plan to charge at each waypoint. Your answer matters....
 


SnBGC

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I‘m actually totally fine with ChargePoint not supporting Plug and Charge. Before the pandemic, I used a ChargePoint commercial station at work every day. It was literally as simple as tapping my watch on the station before plugging in. You don’t even have to select the app first.
Yeah. I enjoyed using their stuff.....especially the AC L2 stations. Now that I am in their vendor program I am learning so much more. I just need to be careful that I dont turn into a CP fanboy. :)
I am sure there are others out there with great programs as well but CP is impressing me right now.

Their solution to long term parking stations is nothing short of genius. SF airport just went online and it is working perfectly. We are getting calls from other airports to get in line for the same type of system. We are going to be very busy this year.

Their fleet solution is different but still in development. A VERY well know delivery service came up with their own solution and CP says they can make it happen. Super excited to participate with that system because it will totally change how we charge away from home or office.
 

dbsb3233

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And when you program your route.....the car will ask if you plan to charge at each waypoint. Your answer matters....
Interesting. I thought I read in that Norwegian article that the MME didn't precondition for charging like that, but I may have misread it. Or maybe they were just mistaken.

Yes, that would be important. If you set a long road trip requiring en route charges, I would hope that the default for that setting is "Hell Yes!".
 

generaltso

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I am sure there are others out there with great programs as well but CP is impressing me right now.
I completely agree. CP really seems to be thinking about real-world problems with L2 charging and is coming up with creative solutions. For example, the CP station at my office has 2 charging plugs and we currently have about 400 employees at that location. Competition for the plugs isn't huge yet, but it will go up as more employees get EVs. So now if I get to work and see that both plugs are already in use, I can simply join a waiting list through the CP app. When a plug becomes available, I get a push notification telling me that it's my turn. The assigned plug will be held for 15 minutes, and if somebody else tries to use it during that time, it will tell them that it's being held for a waitlister and how many minutes are left until the hold expires. If I don't plug in in 15 minutes, the hold is released. If I get the notification while I'm in a meeting and can't move my car right away, I can snooze it, which will skip my turn, move on to the next person on the waitlist, but put me back into the list so that I'm called on next. With so much focus on DCFC in the industry, I'm glad that companies like ChargePoint are still focusing on smart L2 solutions like this since I hope to do 95% of my charging at work.
 

Shayne

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Again... it's another pre-production unit.

The very low 80%+ power rate may very well be a prime candidate for improving in the production units, or later OTA.

Hoping we start hearing some reports from customers that actually have production units soon.
Understand it has been a month and once you understand the problem it takes time to fix. Based on the advertisement and our sales contract I have came to the logical conclusion that it has to be in the final QC checks, has already been addressed or another announcement legally has to be forth coming. Seen a growing trend here, a number of times now, that prohibiting 88 KWh useable is in the manual ?. Agree that production car reviews will be exciting.

Cold weather range is a concern and impacts some. It gets tight around -20 oC, right around when heat pumps don't help (Musk told us this), and it all depends on the lithium you have in the hole. I want it to succeed so bad I can taste it. Can you imagine what a rocket/tank this would have been at 94 KWh usable primed up to 100%. Not the end of the world, just a car, but then there is a bit more to it, with this one, than than any old car. Want to see EV's chew up ICE and spit them out faster ;). I have been watching and waiting for affordable (at least not crazy) for a while now. Not really interested in waiting too much longer (fingers crossed as we sit in a black void and contemplate that it is only a pre-production model).
 

GoGoGadgetMachE

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I‘m actually totally fine with ChargePoint not supporting Plug and Charge. Before the pandemic, I used a ChargePoint commercial station at work every day. It was literally as simple as tapping my watch on the station before plugging in. You don’t even have to select the app first.
I have enough flexibility in what I'll put up with that I used Windows Phone long after I should have, realistically. so I will put up with a lot. ?

that said, CP not supporting Plug and Charge puts them behind the curve. Remember that the competition from a public mindset viewpoint for charging convenience isn't just EA - it's Tesla as well. you know, where you have plug-and-charge.

Now, that said, the whole argument is a bit silly, because nobody expects "plug and fuel" at a gas station - you are used to at least NFC tap-to-pay (or in NJ, handing the mandatory pump jockey your card, perhaps). So, a Teslastan arguing "plug and charge, or die" isn't really arguing completely in good faith.

The argument depends very much on where you start from - either "tap and pay" at a charger is completely fine, or it's an unnecessary step that is behind the curve.

Those are both at least somewhat valid viewpoints coming from where they come from.
 

dbsb3233

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I completely agree. CP really seems to be thinking about real-world problems with L2 charging and is coming up with creative solutions. For example, the CP station at my office has 2 charging plugs and we currently have about 400 employees at that location. Competition for the plugs isn't huge yet, but it will go up as more employees get EVs. So now if I get to work and see that both plugs are already in use, I can simply join a waiting list through the CP app. When a plug becomes available, I get a push notification telling me that it's my turn. The assigned plug will be held for 15 minutes, and if somebody else tries to use it during that time, it will tell them that it's being held for a waitlister and how many minutes are left until the hold expires. If I don't plug in in 15 minutes, the hold is released. If I get the notification while I'm in a meeting and can't move my car right away, I can snooze it, which will skip my turn, move on to the next person on the waitlist, but put me back into the list so that I'm called on next. With so much focus on DCFC in the industry, I'm glad that companies like ChargePoint are still focusing on smart L2 solutions like this since I hope to do 95% of my charging at work.
While that waitlist feature is a nice and useful feature to have, to me it fits more for DCFC. Especially mid-power (like 25-50 kW).

It doesn't make much sense to me for L2 because the whole point (or advantage, anyway) is that it's such low power that it takes most of an overnight, or most of a workshift, to charge. That means it's perfect for "Park it & forget it" charging. If you have to go out and move the car, it becomes a PITA. And if people have to do that, might as well make it 25 or 50 kW when you can make the turnover effort worth it (like 60-120 minute charges).
 

dbsb3233

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I have enough flexibility in what I'll put up with that I used Windows Phone long after I should have, realistically. so I will put up with a lot. ?

that said, CP not supporting Plug and Charge puts them behind the curve. Remember that the competition from a public mindset viewpoint for charging convenience isn't just EA - it's Tesla as well. you know, where you have plug-and-charge.

Now, that said, the whole argument is a bit silly, because nobody expects "plug and fuel" at a gas station - you are used to at least NFC tap-to-pay (or in NJ, handing the mandatory pump jockey your card, perhaps). So, a Teslastan arguing "plug and charge, or die" isn't really arguing completely in good faith.

The argument depends very much on where you start from - either "tap and pay" at a charger is completely fine, or it's an unnecessary step that is behind the curve.

Those are both at least somewhat valid viewpoints coming from where they come from.
At present, the mere existence of a DCFC charger at the needed location far outweighs whether it's P&C or not. When on a road trip, we just want a working charger where we need it, regardless. If it's P&C, fine, but it's rarely gonna be the determining factor.

And where there are multiple options, price become the next determining factor IMO.

After those two criteria, P&C might be a tiebreaker, but for road trips there's rarely that much coverage yet.
 

generaltso

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It doesn't make much sense to me for L2 because the whole point (or advantage, anyway) is that it's such low power that it takes most of an overnight, or most of a workshift, to charge. That means it's perfect for "Park it & forget it" charging.
While that may be the case at home, that has not been my experience at the workplace. Most people do not plug in at empty, so it may only take a few hours to top it off. In addition, a lot of people leave during the day for lunch or to run errands, which also frees up the charging spot for the next person in line. Not to mention that half the vehicles plugged in at my office (including mine) are PHEVs that don't take more than 3 hours to fully charge from empty.

When it's a shared charger, "park it and forget it" doesn't necessarily apply.
 

dbsb3233

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While that may be the case at home, that has not been my experience at the workplace. Most people do not plug in at empty, so it may only take a few hours to top it off. In addition, a lot of people leave during the day for lunch or to run errands, which also frees up the charging spot for the next person in line. Not to mention that half the vehicles plugged in at my office (including mine) are PHEVs that don't take more than 3 hours to fully charge from empty.

When it's a shared charger, "park it and forget it" doesn't necessarily apply.
That starts getting into whether it's a needed charge vs just a convenience charge, I suppose. A PHEV has gas, so any charge away from home is a convenience charge. Still nice to do if easy, of course, but certainly not necessary. While some other people's charges truly are necessary. Like if say, they don't have home charging, or they only have one of the old BEVs that have a mere 60 miles of range or something. Or for someone that has a 100 mile commute each way.

For most newer BEV owners that don't have an excessive commute, and have home charging, work charging usually isn't necessary either. Those people using up a charger at work doesn't make a lot of sense (if they're in demand).

I dunno, it's gonna be a mishmash of needs vs wants developing as more BEVs hit the roads. Gonna be a lot of growing pains, mixed with anger by those that really need a charge that can't get it.
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