slow charging with a 7kw charger homologated by Jaguar - Page 2 - Jaguar I-Pace EV400 Forum
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post #11 of 22 (permalink) Old 08-07-2019, 12:31 AM
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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.
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post #12 of 22 (permalink) Old 08-07-2019, 10:36 AM
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Quote:
Originally Posted by CurtSprings View Post
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%.
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post #13 of 22 (permalink) Old 08-07-2019, 11:35 AM
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Quote:
Originally Posted by tedno View Post
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.
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post #14 of 22 (permalink) Old 08-07-2019, 11:59 AM
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In 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 Jaguars earlier promo videos even mentioned that charging slows after 80%.

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post #15 of 22 (permalink) Old 08-07-2019, 12:35 PM
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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.
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post #16 of 22 (permalink) Old 08-07-2019, 12:44 PM
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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%.


I-Pace FE, Corris Gray, 20" rims
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post #17 of 22 (permalink) Old 08-07-2019, 01:04 PM
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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).
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post #18 of 22 (permalink) Old 08-07-2019, 01:29 PM
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I prefer Spanish Jamon ... but sciencegeek is correct. See chart 5 ...
https://www.analog.com/media/en/tech...niques-....pdf

I-Pace FE, Corris Gray, 20" rims
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post #19 of 22 (permalink) Old 08-07-2019, 03:23 PM
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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.
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post #20 of 22 (permalink) Old 08-07-2019, 03:34 PM
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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/20...63101-9999.pdf
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