18% regeneration?
- Thread starter donn
- Start date
Cephalotus
10 kW
- Joined
- Jun 18, 2012
- Messages
- 755
The regen quote on CA3 is measured different from industry standards.
The "quote" in CA3 is not Energy regen/ Energy consumed as usual, but Energy regen / (Energy consumed- Energy regen)
So in industry standard if you consume 100Wh but gain 50Wh from regen your regen quote would be 50%
On the CA3 the regen quote calculated under the same conditions is 100%
So the CA3 gives higher numbers than industry standard, especially for high regen numbers. (in reality CA3 shows range extension, not regen quote)
----
Besides this regen quote is based on your terrain and how you brake
All my numbers are with BionX D motors in 28" wheels, 13s battery and 30A BionX controller
For my bikes with a system weight of around 100kg you gain around 0,5Wh when braking from 30km/h to near zero and around 0,9Wh when braking from 40km/h to near zero.
In moderate hilly terrain I gain around 1Wh/km from braking downhill and in stop and go city traffic I also gain around 1Wh/km from regular braking to standstill. In mountainous regions regen can reach up to 4-5Wh/km going downhill, in flat terrain without the need to stop regularly regen is obviously close to zero.
Overall 1Wh/km is realistic with my bikes and BionX D system.
So the quote depends on how much you consume. Touring with a 25km/h Pedelec consumption can be as low as 3Wh/km, so regen at 1Wh wold give you an industry quote of 33% (CA would show 50%)
On a 45km/h speed pedelec consumption can be 10Wh/km, so regen quote would be only 10%.
Here is a picture from braking at 40km/h with BionX-D (regen limited to 8A, you don't gain much if going up to 12A)
So this is from part of a trip that I made this summer through Switzerland and France.
This is how our bikes looked like, my system weight was around 120kg. Motor drive was a BionX D limited to 45km/h, 25A and 10A regen. Battery in my case a 13s8p with Panasonic PF cells (Ri around 100mOhm)
This are our speed pedelec: (battery is in the frame bag)
This are statistics for this part of the trip. Overall regen by industry standard in Wh regen / Wh consumed (named "Rekuquote") has been 14,3%. During some days it was lower, during some days significantly higher. Maximum eneryg gained on one day with regen was 200Wh. Regen overall was 1,2Wh/km. A bit higher than the rule of thumb, but the system weight was 20% higher, too, because of the luggage for camping.
And here you get the link to a large jpg with all the logged currents over those 1000km+:
https://www.bilder-upload.eu/upload/8617b1-1567277969.jpg
The "quote" in CA3 is not Energy regen/ Energy consumed as usual, but Energy regen / (Energy consumed- Energy regen)
So in industry standard if you consume 100Wh but gain 50Wh from regen your regen quote would be 50%
On the CA3 the regen quote calculated under the same conditions is 100%
So the CA3 gives higher numbers than industry standard, especially for high regen numbers. (in reality CA3 shows range extension, not regen quote)
----
Besides this regen quote is based on your terrain and how you brake
All my numbers are with BionX D motors in 28" wheels, 13s battery and 30A BionX controller
For my bikes with a system weight of around 100kg you gain around 0,5Wh when braking from 30km/h to near zero and around 0,9Wh when braking from 40km/h to near zero.
In moderate hilly terrain I gain around 1Wh/km from braking downhill and in stop and go city traffic I also gain around 1Wh/km from regular braking to standstill. In mountainous regions regen can reach up to 4-5Wh/km going downhill, in flat terrain without the need to stop regularly regen is obviously close to zero.
Overall 1Wh/km is realistic with my bikes and BionX D system.
So the quote depends on how much you consume. Touring with a 25km/h Pedelec consumption can be as low as 3Wh/km, so regen at 1Wh wold give you an industry quote of 33% (CA would show 50%)
On a 45km/h speed pedelec consumption can be 10Wh/km, so regen quote would be only 10%.
Here is a picture from braking at 40km/h with BionX-D (regen limited to 8A, you don't gain much if going up to 12A)
So this is from part of a trip that I made this summer through Switzerland and France.
This is how our bikes looked like, my system weight was around 120kg. Motor drive was a BionX D limited to 45km/h, 25A and 10A regen. Battery in my case a 13s8p with Panasonic PF cells (Ri around 100mOhm)
This are our speed pedelec: (battery is in the frame bag)
This are statistics for this part of the trip. Overall regen by industry standard in Wh regen / Wh consumed (named "Rekuquote") has been 14,3%. During some days it was lower, during some days significantly higher. Maximum eneryg gained on one day with regen was 200Wh. Regen overall was 1,2Wh/km. A bit higher than the rule of thumb, but the system weight was 20% higher, too, because of the luggage for camping.
And here you get the link to a large jpg with all the logged currents over those 1000km+:
https://www.bilder-upload.eu/upload/8617b1-1567277969.jpg
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