Are We Asking the Wrong Question About Charging?

[hydbob]

Let's ask the Pure and Touring Owners:

When you charge @ a DCFC (e.g., EA, EVGo, ertc.), how long does it take for you to charge from 10% to 30% SoC? How long does it take for you to charge from 10% SoC to 80% SoC?

Does your Lucid Pure/Touring meet your expectation regarding the charging speed at DCFCs?

Thread 'Charging curve logs post 2.1.52'
https://lucidowners.com/threads/charging-curve-logs-post-2-1-52.8093/

 

[Pragmatic]

P

Post in thread 'Beyond the Charging Curve: What Are Your Real-World DCFC Speeds?'

Dec 17, 2024

Well I said I'd check next time I was on a trip.
2023 Pure AWD, 45F, preconditioned for 35 minutes, driving between 60 and 75.
Took 30 seconds from attaching plug until charging began
Speed. SOC
238kw. 5%
222kw. 10%
200kw. 15%
187kw. 20%
172kw. 25%
160kw. 30%
148kw. 35%
139kw. 40%
125kw. 45%
112kw. 50%
101kw. 55%
91kw. 60%
82kw. 65%
74kw. 70%
65kw. 75%
57kw. 80%
Total time 37 minutes.

• Pragmatic

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[borski]

BTW, if you do the "Rule-of-Thumb" calculation, AGT with 22 modules charges ar 900V, then Pure/Touring with 18 modules should be charging around 900*(18/22) ~736V, not 600V!


The delta between 736V vs 600V could easily exaplin the slower charging rate on the Pure/Touring. Perhaps there are other limiters taht I am unaaware of. But is is not the charging physics or electrochemistry.

I am not trying to be an ass...but the numbers don't seem to jive!

I don’t know what “rule of thumb” calculation you’re doing, but again, I did the math for you, as did Peter in the battery video, which if you haven’t watched you really should. 924V max for the GT/DE/GT-P, 756V max for the Pure/Touring.

Post in thread 'Are We Asking the Wrong Question About Charging?'
https://lucidowners.com/threads/are-we-asking-the-wrong-question-about-charging.10858/post-241372

This horse seems pretty dead to me.

 

[Lucken]

I would think ambient temperature plays a role in both the DCFC’s output as well as how fast the battery will accept a charge. We had 6 degree temps this morning (coldest I can recall in several years), and just for fun I went over to my local DCFC, a 5 minute drive, to see what the speeds were. With no preconditioning, and a 55% SOC, I was pulling a turtle-like 45kw. Yikes! After about 10 minutes I ‘zipped’ up to 53kw.

 

[timpossible]

'23 Pure here and 20%-81% is always between 32-36mins, even 15%-81% is also 32-36mins. I've never charged past 81% because 30mins for 80miles of driving doesn't seem worth it. This is for 41kwh-65kwh of charge as reported by the EA chargers. There are a lot of variances in the charger temp, temp of your car, weather, on different days, but charging to 81% generally requires about 34mins average. Never charged in freezing weather so I wouldn't know. Charging from 15%-30% is super quick about 6-7mins, but it's not enough range for me. But even extrapolating the fast charging that occurs when the battery is low to 80% you're really only going to save 10mins, which is probably more helpful to the person waiting to charge and keeping the line moving.

 

[BS8899]

P

Post in thread 'Beyond the Charging Curve: What Are Your Real-World DCFC Speeds?'

Dec 17, 2024

Well I said I'd check next time I was on a trip.
2023 Pure AWD, 45F, preconditioned for 35 minutes, driving between 60 and 75.
Took 30 seconds from attaching plug until charging began
Speed. SOC
238kw. 5%
222kw. 10%
200kw. 15%
187kw. 20%
172kw. 25%
160kw. 30%
148kw. 35%
139kw. 40%
125kw. 45%
112kw. 50%
101kw. 55%
91kw. 60%
82kw. 65%
74kw. 70%
65kw. 75%
57kw. 80%
Total time 37 minutes.

• Pragmatic

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• 

That's pretty good.

I don’t know what “rule of thumb” calculation you’re doing, but again, I did the math for you, as did Peter in the battery video, which if you haven’t watched you really should. 924V max for the GT/DE/GT-P, 756V max for the Pure/Touring.

Post in thread 'Are We Asking the Wrong Question About Charging?'
https://lucidowners.com/threads/are-we-asking-the-wrong-question-about-charging.10858/post-241372

This horse seems pretty dead to me.

I don't own a Pure or a Touring. As such, I do not have actual data on those trims. Some Touring/Pure owners reported significantly longer charge times compared to what's expected. Some of those numbers were posted previously. I will let them speak for themselves.

I posted my AGT charging data. As I noted in my prior posts, I don't get 30min @10-80% as one would expect. I average between 50-60m 10% to 80% session time (including starting to finishing). I posted a 46m charging session in my post last week. As I noted in my post, I am not blaming Lucid for it. I said clearly that EA chargers and "unbeneficial energy" wastes (see SoC videos) might be contributing factors. You were dismissive about these factors. But my many charging sessions on road trips suggest that they are real and make the actual charging session time longer than expected.

If I remember correctly, @momo3605 posted his charging experience. I will let you look it up yourself.

 

[borski]

That's pretty good.

I don't own a Pure or a Touring. As such, I do not have actual data on those trims. Some Touring/Pure owners reported significantly longer charge times compared to what's expected. Some of those numbers were posted previously. I will let them speak for themselves.

I posted my AGT charging data. As I noted in my prior posts, I don't get 30min @10-80% as one would expect. I average between 50-60m 10% to 80% session time (including starting to finishing). I posted a 46m charging session in my post last week. As I noted in my post, I am not blaming Lucid for it. I said clearly that EA chargers and "unbeneficial energy" wastes (see SoC videos) might be contributing factors. You were dismissive about these factors. But my many charging sessions on road trips suggest that they are real and make the actual charging session time longer than expected.

If I remember correctly, @momo3605 posted his charging experience. I will let you look it up yourself.

I wasn’t referring to charging times. I was referring to the voltages the respective trims run on. We don’t have to guess at what those are; we know them.

That’s all I was clarifying.

To be clear, I have not intended to be dismissive about anything. Of course EA chargers, temperatures (of both the battery and of the power cabinets), and so on affect the rate of charge. But it affects the rate of charge for different trims at proportional rates.

If you were to precondition for long enough to get the batteries to an ideal temp, and if you were to be at a DCFC charger reliably providing high speeds, you should be charging as quickly as promised. If you *never* do, there is something wrong.