Battery Pack

anish.ts · February 29, 2020, 5:45am

80 to 90 % also can be added

channelcarrera · February 29, 2020, 1:08pm

I just took delivery of my vehicle yesterday. Is it normal for the SoC to increase without charging? Parked scooter at work with 48% 4 hours later it’s at 52%. Is something wrong? Or just a bonus?

hemanth.anand · February 29, 2020, 3:13pm

That’s a welcome gift

Jokes apart, hope it was in the same mode you left it. If it happens frequently, I’d suggest you get it checked. If it doesn’t repeat, it’s probably some erratic bug.

channelcarrera · February 29, 2020, 3:19pm

Lol! Alright, I’ll keep an eye out for it. It is in the same mode I left it in.

acorreya · February 29, 2020, 5:43pm

What time did you park the vehicle and when did you get back? Li cells are notorious with temprature shifts.

channelcarrera · March 1, 2020, 12:15am

Parked at 2 PM. It was about 30°C outside in the open where it was parked. When I got it back it was 9 PM, about 25°C.

acorreya · March 1, 2020, 3:57am

This + the riding heat should explain the change. But need a clarification from the team on this.

channelcarrera · March 1, 2020, 4:05am

Makes sense but isn’t it designed to be in the sun at that heat for a few hours? Also, I didn’t hear the fan kick in till after about 4-5 kms into the ride. Maybe it wasn’t too hot.

acorreya · March 1, 2020, 4:17am

Yup. It is designed for the heat. The chance also maybe the bms learning the batterystats? Not sure now. Maybe someone from ather can clarify here?

channelcarrera · March 1, 2020, 12:34pm

I’m gonna contact CS soon for an explanation. Happened again, went from 88% and 65 Kms to 91% and 67 kms

crispypoppadom · March 1, 2020, 1:05pm

I’ve noticed similar fluctuations too but slightly different. Whenever I charge to 91-95% the previous night and switch off (no shutdown), it stays the same or reduces only by 1%. After the recent update where the scooter status syncs to the phone, I found out it reduces by 2-3% and increases again later.

Another instance: Came home at 5am today with 40%. Just parked my scooter and crashed. Woke up at 11 and charge status was at 36%. Pretty normal. But at about 1pm, it went up to 37%.

This doesn’t affect the performance or electricals in any way, so I’ve just ignored it assuming the BMS is just having a little party and recovering from the hangover before I ride.

channelcarrera · March 1, 2020, 1:30pm

Lol! Sounds very similar to my situation. I’m guessing its just the BMS recalibrating or whatever. But, this does not affect performance or user experience in any way. If anything, it is great to see some 2 km of bonus range.

rajeshkav · March 1, 2020, 1:48pm

@acorreya , @channelcarrera,

This phenomenon is called voltage bouce back and it is quite common in high drain vehicles. This issue is discussed in length and I am adding that link here again

https://forum.atherenergy.com/t/battery-soc-indicator/2902/15?u=rajeshkav

Nothing to worry about and it is quite common.

channelcarrera · March 1, 2020, 1:54pm

Ahh! This is so interesting! I feel like I’m something new about EVs everyday.

govindrover · March 7, 2020, 12:43pm

What’s the idle battery drain rate.

crispypoppadom · March 7, 2020, 1:05pm

1% every 2 hours roughly. But could be lesser.

govindrover · March 7, 2020, 1:47pm

Thanks, because I had a drain of 2% for 18 hours.

crispypoppadom · March 7, 2020, 5:43pm

Yup, it varies a lot actually. Over a 10 or 12 hour period, overnight or at the office parking lot, I lose about 5%. But in 24 hours, I’ll lose only 8%. If I charge the vehicle to somewhere between 92-95% the previous night, I lose 1-2% in 10-12 hours. Or if it’s at 93% exactly previous night, I lose 0% by morning. Might even gain 1% #firstworldproblems

govindrover · March 7, 2020, 5:47pm

Interesting and yet confusing

Soon I’ll get used to it

sunku.vignesh · March 8, 2020, 2:09am

We lose more battery when we need it the most basically XD