Battery Losing Range at Low SOC

Samo23

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Lucid GT-P
Here's an issue I'm having with my 2022 GTP

I park the car at low SOC, and in anywhere from 45 minutes to 4 hours, the car will lose a significant amount of range.

On January 23rd, my wife and I stopped to eat after a long drive with 31 miles stated range remaining. After 45 minutes, we returned to the car, which now had 6 miles of range remaining. In 45 minutes the car lost 25 miles of stated range. The charger was 7 miles away, and we limped turtle mode at 20mph until we reached the charger.

This has happened to me on multiple occasions with varying degrees of length in between an severity of situation this has forced me to be in.

Another time. I brought her to the hospital for an urgent and unplanned surgery,

I parked the car with 13 miles of range. Ran her inside, came back 1 hour later and the car had 4 miles of range. The car limped me 3 miles to the nearest charger with 0 miles of stated range.

I could continue to go on. These are the 2 most severe and unbelievable circumstances this car has put me in.

Lucid has stated this is normal, how is this normal?

Today, after bringing the car in for service and being told "it's expected the car can lose 30 miles of range in an hour", and accusing me of "changing my story", then subsequently leaving, I let my car get to 21 miles of range as you can see here.

4 hours later, it shows 6. No climate control on, Parked in a heated garage, key NOWHERE near the vehicle. Nothing. This car loses 2 miles in 2 days, but at low SOC will lose anywhere from 15-30 in an hour. This is not normal and not cool.

Has anyone had this experience? Looking for any explaining. I have had a touring prior to this. And it never ever ever did this to me. Also, my wife has a chevy bolt, and I left that car with 19 miles of range for TWO WEEKS and it lost 4 miles. What gives man
 

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In that case the change in range does seem excessive.
No, please understand. I left the car with 21 miles of range. I did not drive it. I got back in the car 4 hours later and 15 miles are gone.
 
I don’t use miles for range. Only percentages. This is our fourth EV (including wife’s). Including two Teslas. I know how things work. Probably not by choice, but my friendly advice, never leave your car at such low state of charge. Keep them at 20% or more at minimum. You will not get in trouble if you do that. My two cents
 
No, please understand. I left the car with 21 miles of range. I did not drive it. I got back in the car 4 hours later and 15 miles are gone.
Sorry, my fault. I'm so used to being told this is normal I thought you said "does NOT seem excessive" haha
 
I don’t use miles for range. Only percentages. This is our fourth EV (including wife’s). Including two Teslas. I know how things work. Probably not by choice, but my friendly advice, never leave your car at such low state of charge. Keep them at 20% or more at minimum. You will not get in trouble if you do that. My two cents
I hear you. And that's always ideal. But some times that does not fit reality, like literally bringing my wife to the hospital or simply stopping for a bite to eat 7 miles away from a charger....
 
Here's an issue I'm having with my 2022 GTP

I park the car at low SOC, and in anywhere from 45 minutes to 4 hours, the car will lose a significant amount of range.

On January 23rd, my wife and I stopped to eat after a long drive with 31 miles stated range remaining. After 45 minutes, we returned to the car, which now had 6 miles of range remaining. In 45 minutes the car lost 25 miles of stated range. The charger was 7 miles away, and we limped turtle mode at 20mph until we reached the charger.

This has happened to me on multiple occasions with varying degrees of length in between an severity of situation this has forced me to be in.

Another time. I brought her to the hospital for an urgent and unplanned surgery,

I parked the car with 13 miles of range. Ran her inside, came back 1 hour later and the car had 4 miles of range. The car limped me 3 miles to the nearest charger with 0 miles of stated range.

I could continue to go on. These are the 2 most severe and unbelievable circumstances this car has put me in.

Lucid has stated this is normal, how is this normal?

Today, after bringing the car in for service and being told "it's expected the car can lose 30 miles of range in an hour", and accusing me of "changing my story", then subsequently leaving, I let my car get to 21 miles of range as you can see here.

4 hours later, it shows 6. No climate control on, Parked in a heated garage, key NOWHERE near the vehicle. Nothing. This car loses 2 miles in 2 days, but at low SOC will lose anywhere from 15-30 in an hour. This is not normal and not cool.

Has anyone had this experience? Looking for any explaining. I have had a touring prior to this. And it never ever ever did this to me. Also, my wife has a chevy bolt, and I left that car with 19 miles of range for TWO WEEKS and it lost 4 miles. What gives man
Lucid is not good at math. I'd be stressed out letting it get below 20%!
 
Lucid is not good at math. I'd be stressed out letting it get below 20%!
Shouldn't I be expecting the world's most advanced EV to accurately predict its remaining range 100% of the time? Not just 80% of the time? And to not have significant phantom drain when I really need it to be accurate? It seems this is an issue with the BMS as it ONLY does this at low SOC, does anyone agree or have an explanation other than dont let it get low? 15 mile phantom drain in 45 minutes is an issue no matter what SOC, no?
 
I wonder if it had something to do with the battery cooling from operating temperature to a much lower ambient temp.
 
I wonder if it had something to do with the battery cooling from operating temperature to a much lower ambient temp.
ChatGPT seems to think it's a cell balancing and protection issue at low SOC, or that the BMS may recalculate the given level of charge differently when the pack voltage is very low. Chat also notes that the type of battery cell from Samsung the grand touring performance uses is known to have aggressive and sudden cell voltage loss at low SOC
 

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ChatGPT seems to think it's a cell balancing and protection issue at low SOC, or that the BMS may recalculate the given level of charge differently when the pack voltage is very low. Chat also notes that the type of battery cell from Samsung the grand touring performance uses is known to have aggressive and sudden cell voltage loss at low SOC
Good bot
 
I think ChatGPT is correct. I recently had a very similar experience with my AGT. Noticed that my range had suddenly diminished from where it normally was, especially when I was at a low SOC. . I explained to my SC that it was as if electrons were "leaking out of my battery". Indeed, when they checked it, cells were out of balance. They replaced my entire battery with a refurbished one. Problem was solved.
 
I think ChatGPT is correct. I recently had a very similar experience with my AGT. Noticed that my range had suddenly diminished from where it normally was, especially when I was at a low SOC. . I explained to my SC that it was as if electrons were "leaking out of my battery". Indeed, when they checked it, cells were out of balance. They replaced my entire battery with a refurbished one. Problem was solved.
Holy shit. Thank you for this. Did they first tell you it was "normal" and tell you your battery health was "normal". I get my overall capacity of the battery is fine, but this is what happens when there's an issue with cells being out of balance, the pack acts weird at low voltages.

Also, what happens at low SOC with me during these issues is that I'll drive 2 miles and it will burn 10.

Chat seems to think this is because there is a voltage issue the BMS is trying to protect. And at low SOC, the BMS is working to balance these "out of line" cells which causes the pack to suddenly lose 4-5% capacity as the whole pack has to adjust downward from faulty cells
 
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