endonuclease
100 µW
- Joined
- Nov 13, 2017
- Messages
- 7
Hi, I have a new ebike setup and a problem has occurred. After about 10 kilometres (7 miles) the cycle analyst shut down. The Vshutdown for the THUNE is set to 10 V (default). This is my bike setup: DD Crystalyte HS3540, GRINTECH sensorless 40A 72volt controller, CA-DPS (with external speedometer sensor), battery: Li-ion 20S8P. At the start of the ride the bike run like a dream with regen breaks working. But when the voltage sag go down to around 70-ish volt, the battery indicator shows empty and the CA screen goes blank, and I suspect that the THUNE goes below 10 volts. Fully charged the battery is at 84volt, but the BMS is set much lower than 70volt, I believe 60 or 64volt (so I "know" it is not the BMS that shut down the battery). When I turn off the key-switch and turn it back on again, the battery indicator shows almost full battery again and the CA-DPS (ver.2.4) start up again. This issue start to happen after I've just used about 1,5 Ah from the battery. The triangle-battery can push out 40A, but I have set it to 38A just for precautions.
Perhaps there are some adjustments to the CA-DPS I can do ? Perhaps maybe trick it by changing the battery-chemistry that can handle more sag, or by changing the sensing voltage/ratio so that the analyst "believe" the voltage is higher than it really is ? I could really need some help with this issue because the bike is brand new and is for sale.
--Why can't they make triangle LiFePO4 pouch cells ? Pouch cells are superior to 18650 cells--
Perhaps there are some adjustments to the CA-DPS I can do ? Perhaps maybe trick it by changing the battery-chemistry that can handle more sag, or by changing the sensing voltage/ratio so that the analyst "believe" the voltage is higher than it really is ? I could really need some help with this issue because the bike is brand new and is for sale.
--Why can't they make triangle LiFePO4 pouch cells ? Pouch cells are superior to 18650 cells--