[Stash42]

since a cooling liquid level warning light popped out (apparently there was no leak, just a sensor malfunction) the charging rate overnight has fallen to 4% (3.87 kw per hour), a bit more than half the potential rate. charging the car from 0-100% can take over 24 hours. Is anyone experimenting the same issue? does anyone knows what could be the reason? the car dealer hasn't found yet what can be the issue.
thanks for your help.

 

[sgtpeper]

Did you check your breaker at home?

 

[jsimon7777]

Does this problem happen with other chargers?

 

[Stash42]

since a cooling liquid level warning light popped out (apparently there was no leak, just a sensor malfunction) the charging rate overnight has fallen to 4% (3.87 kw per hour), a bit more than half the potential rate. charging the car from 0-100% can take over 24 hours. Is anyone experimenting the same issue? does anyone knows what could be the reason? the car dealer hasn't found yet what can be the issue.
thanks for your help.

Did you check your breaker at home?

Thanks for replying. everything is new, it has been installed together with the charger. I don't have the knowledge to see if there an issue there, but it's a good idea, I'll ask the company that made the installation.

 

[Ayepace]

240V circuit with a double breaker with the charger plugged in all the time, or hardwired? Has it half failed and working like a 120V charger? Switch off the breaker completely, wait at least 10 seconds and switch on the breaker. Do this even if the charger isn't plugged in all the time.

 

[rcomeau]

The fact that it co-insides with a coolant leak warning, I'd guess the car is limiting the charge rate to protect the battery. If the breaker had tripped, you'd have no current. I don't think twinned breakers (220v) can trip half-way since the switches are ganged together, otherwise, you'd lose a big part of the reason they are there.

Get the sensor fixed and I am pretty sure the charging issue will go away as well.

 

[Ayepace]

f the breaker had tripped, you'd have no current. I don't think twinned breakers (220v) can trip half-way since the switches are ganged together, otherwise, you'd lose a big part of the reason they are there.

Although logic and intended design says that, and I would agree with you, I have actually seen one half fail without tripping off the whole circuit. It puzzled me too. It was replaced, of course.

 

[sciencegeek]

Thank you for teaching me a new word. Was this situation really homologated by JLR? I can't imagine that they would say to you "yeah you're using a 7kW cable but the car is designed to use only 3kW."

I am using a generic 7kW charging cable ... invariably (to my frustration) the car starts throttling the rate of charge downward after ~30 min or less. Same has happened to me on a commercial ChargePoint charger at a hotel overnight, and I was dismayed to learn that I would have to spend another two hours in the sihtty hotel room to wait for 100%, which I needed at the time. The solution is always (in my case) to unlock the car, unplug, plug back in. Then it keeps charging at 7kW. It's a bug. Your situation may be more severe, given the ominous sensor issue.

 

[Meldev##44]

I have noticed a reduction in the AC Level charge rate at home also. (only see in ChargePoint app)
It occurs as the SOC gets higher, say 80% give or take.

So I just spoke with a tech at ChargePoint and he said this is normal.
It is the car talking with the charger to slow as it approaches full SOC.
Even if charging at L2, it will slow.:surprise:

I have not tried the unplug then restart option yet.:|

The bottom line is to charge to 80% then stop, else it's going to be a while.
It would be nice to see a graph that show charge rate vs. SOC.:nerd:

 

[2761]

I have noticed a reduction in the AC Level charge rate at home also. (only see in ChargePoint app)
It occurs as the SOC gets higher, say 80% give or take.

So I just spoke with a tech at ChargePoint and he said this is normal.
It is the car talking with the charger to slow as it approaches full SOC.
Even if charging at L2, it will slow.[img= class=inlineimg]https://www.i-paceforum.com/forum/images/I-PaceForum/smilies/tango_face_surprise.png[/img]

I have not tried the unplug then restart option yet.[img= class=inlineimg]https://www.i-paceforum.com/forum/images/I-PaceForum/smilies/tango_face_plain.png[/img]

The bottom line is to charge to 80% then stop, else it's going to be a while.
It would be nice to see a graph that show charge rate vs. SOC.[img= class=inlineimg]https://www.i-paceforum.com/forum/images/I-PaceForum/smilies/tango_face_glasses.png[/img]

I've seen the same phenomenon. My Chargepoint level 2 charger drops from 7.6 kWh to 7.0 kWh once the SoC reaches 80%. It's not a dramatic drop but it's there nonetheless. I think it's designed to reduce heat and extend the lifetime of the battery.

 

[sciencegeek]

The whole thing is riddled with bugs or not-well-thought-out behaviors. I've posted ad nauseam about my issue where it throttles even at low SoC and when I do some gymnastics it charges fine after that.

 

[tedno]

I've seen the same phenomenon. My Chargepoint level 2 charger drops from 7.6 kWh to 7.0 kWh once the SoC reaches 80%. It's not a dramatic drop but it's there nonetheless. I think it's designed to reduce heat and extend the lifetime of the battery.

Just an FYI... I'm not seeing a problem with charging at home with my chargepoint charger. See attached image showing one of my charges. As CurtSprings notes there is a slight drop from 7.6 to 7 during the charge but i don't consider this an issue. The drastic changes in rate shown late in the charge occur during the last hour when the remote app show the cars battery percentage at 100%.

 

[Time2Roll]

Just an FYI... I'm not seeing a problem with charging at home with my chargepoint charger. See attached image showing one of my charges. As CurtSprings notes there is a slight drop from 7.6 to 7 during the charge but i don't consider this an issue. The drastic changes in rate shown late in the charge occur during the last hour when the remote app show the cars battery percentage at 100%.

Looks normal and expected to me.

 

[squishball]

I’n pretty sure reduced charging rate is common for Lithium Ion batts, after they exceed approximately 80% or so SOC. It happens with my iPhone X and MacBook Pro. One of Jaguar’s earlier promo videos even mentioned that charging slows after 80%.

 

[2761]

I agree with squishball. I've seen the reduction in charging rate when the SoC is at 100%. I think the system is trying to squeeze as much energy as possible into the battery to maximize range but reduce heat.

 

[squishball]

Hi all. I found the Jaguar I-Pace video on home charging. About 3 minutes into the video, it mentions that once the SOC hits 80%, the remaining 20% may take as long to achieve as the first 80%.

 

[sciencegeek]

Baloney. On a 7kW charger the rate starts decreasing at ~95% reported SoC. (Unless the bug kicks in, in which case it starts decreasing at some random time after plugging in regardless of SoC).

 

[squishball]

I prefer Spanish Jamon ... but sciencegeek is correct. See chart 5 ...
https://www.analog.com/media/en/technical-documentation/technical-articles/A-Closer-Look-at-State-Of-Charge-and-State-Health-Estimation-Techniques-....pdf

 

[Ayepace]

I occasionally use a 50kW Chargepoint charger (actually 48kW if you read its label). It's display shows a 42-45kW rate until the car gets to 85%, tapers to 30kW at 91%, 20kW at 96$ and then drops off from there. The last part takes about 20 minutes to get to 100% if left to charge to that level.

My Juicebox Pro 40 charging indicates 7.6-7.7 until 100% charged, then it drops to 0 for a very brief moment. Its behavior after that is inconsistent but usually jumps back up to 3.x-6.x and unsmoothly tapers down from there for some inconsistent period of time, usually about 1 hour.

 

[Ayepace]

Concerning the original post situation, it may be related to the PCM having a value stored in it from the problem event and that value needs to be cleared.

Similar to what happened to some cars during manufacturing.
https://static.nhtsa.gov/odi/tsbs/2019/MC-10163101-9999.pdf