New charge curve?

Faults and Technical chat for the Honda E
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hondaeboy
Posts: 78
Joined: Thu Oct 06, 2022 2:42 pm
Location: NL

Post by hondaeboy »

Has the charge curve changed recently? Because my most recent quick charge was horribly slow.

Normally, I don't use the (DC) fast charging option, but to be a little bit more prepared for longer trips, I decided to do tiny trial fast charge while getting a sandwich and a coffee. My car was at 68% and wanted to have a quick 10-minute charge to get it up to 80% before heading home.

I was aware of the charge curve going down at higher SoC's, but I wasn't expecting such an abysmal result as I did today. After plugging in, the car immediately said it would take no less than 33 minutes (!) to charge up to 80%. That would have made sense to me if the battery was at a 10-15% SoC, but not 68%!

I was expecting it to charge at around 20 or 30 kW. After 25 minutes I just left, seeing it was charging at only 10 kW. Is this abnormal, or is it just a temperature thing? (It was around 4 C).

charge-curve-honda-e-3.png

charge-curve-honda-e-2.png

charge-curve-honda-e-1.png

2021 Honda e Advance on 16" RC30 wheels with Goodyear 195/55 & 205/55 tyres.
Wrapped in Red metallic with full black and cinnamon leather interior.

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FDAD
Posts: 468
Joined: Mon Aug 10, 2020 1:55 pm
Location: Porto, Portugal

Post by FDAD »

The charging curve will change according to the battery temperature etc... Below are some graphics from the same day.

It was a rainy day with 7°c lower temp and 13° max temperature.

Did a total of 500kms..

IMG_20230307_220611.jpg

IMG_20230307_220452.jpg

IMG_20230307_220406.jpg

Honda E advance [Modern Steel Metallic] 8-) [DELIVERED JULY 2020] - 85 000Kms + ✌️🎂
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pauketju
Posts: 14
Joined: Mon May 30, 2022 10:56 am
Location: NORWAY

Post by pauketju »

Temperature is the biggest factor in my experience too.
Even at <10% SoC you can get as low as 10kW if it is cold enough. -10C really kills it.
In Norway i never even saw 50kW last summer doing 1000++km road trips.

photo_2023-03-14 10.09.41.jpeg

Advance Platinum pearl white 17"
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hondaeboy
Posts: 78
Joined: Thu Oct 06, 2022 2:42 pm
Location: NL

Post by hondaeboy »

pauketju wrote: Tue Mar 14, 2023 9:11 am Temperature is the biggest factor in my experience too.
Even at <10% SoC you can get as low as 10kW if it is cold enough. -10C really kills it.
In Norway i never even saw 50kW last summer doing 1000++km road trips.
OK, this is good to now when planning for longer trips. I was naive to think that the charge curves were accurate, and that charging from 10-80% would actually only take 30 minutes. It seems to consistently take twice as long.

Usually I use Maps and TomTom to look at nice and/or efficient routes. And I use ABRP to get a bit of sense of how long a trip will actually take (including the charging session), but with the charge curve being so ridiculously far off, ABRP was always way too optimistic.

For now I have kind of fixed this by changing the Settings > Battery > Charging Overhead to 30 minutes in ABRP.
2021 Honda e Advance on 16" RC30 wheels with Goodyear 195/55 & 205/55 tyres.
Wrapped in Red metallic with full black and cinnamon leather interior.
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Reuben80
Posts: 547
Joined: Mon May 25, 2020 3:29 pm
Location: Malta

Post by Reuben80 »

It all depends on the battery temperature. To get maximum speeds needs to be between 24 to 35 degrees. To measure the battery temperature I use the app called Power cruise control for the Honda e.
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