Bosch PowertTube not charging after recelling

mihaimsc

Just Joined
Apr 3, 2025
4
6
Hello, I receled the PowerTube and now when I put the charger on it does this:
-it lights up 3 leds
-charger cliks
-first and second led stays on while the 3rd one is blinking 2 times
-charger cliks again
-the 3 leds stay on and does not charge.

When I press the button on the battery it´s showing the 3 leds the pack has 35,6V right now

Do you have any ideea if I can do something to start charging or what happened?

Thank You!
 

sjpt

Esteemed Pedelecer
Jun 8, 2018
3,964
2,823
Winchester
Were you careful while recelling to ensure that the BMS never lost power during the recell process.
If not the BMS probably died, in that case from what I have read here the battery is bricked.
I don't know if a dead BMS would give those symptoms though.
 

mihaimsc

Just Joined
Apr 3, 2025
4
6
Yes I was careful and the bms did not lost power I had a power supply on, with the old batteries was having 41,1V (5leds on) and when I put together the new cells they were having 35,6V, I then reduced the voltage from the power supply to 35,6V to match the cells. Then I solder it, then I mounted the bms ribbon. After that It was showing 3 leds. And when I put the charger it makes the thing that I already write on my first message.
 

soundwave

Esteemed Pedelecer
May 23, 2015
17,605
6,683
those boards dont like being messed with and if you have damaged one of the sensors its a bin job bms wise as some did get them to change but then wont power on the bike.

you could try the guy in my sig as only person in uk messing with can bus locked batts
 

AndyBike

Esteemed Pedelecer
Nov 8, 2020
1,564
658
I was under the impression you couldnt recell a Bosch battery, and if you tried it it would stop functioning due to installed software
 

soundwave

Esteemed Pedelecer
May 23, 2015
17,605
6,683
you need the magic power n not blow up :eek:
 

sjpt

Esteemed Pedelecer
Jun 8, 2018
3,964
2,823
Winchester
you could try the guy in my sig as only person in uk messing with can bus locked batts
Looks as if mihaimsc joins the ranks of people successfully messing with can bus locked batts; well done mihaimsc
 

soundwave

Esteemed Pedelecer
May 23, 2015
17,605
6,683
they changed the bms on the smart batts :mad:
 

soundwave

Esteemed Pedelecer
May 23, 2015
17,605
6,683