GIANT TWIST E-bike battery ( Charging Issue )

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[@DenHakim]

Thanks for the video. But maybe my comment can help other people. Had bought a Giant Twist with 2 batteries in 2nd hand. Charger flashed after 7 seconds on both batteries. Problem and solution 1: 2 of the 4 wires loose in the charger’s plug, these were rewelded and problem solved with battery 1. With the 2nd battery the charger kept flashing. Bizarre because there was at least 24.5V left and all cells gave approximately the same value. Just turned out to be the 5 AMP fuse.

[@wakefieldgregg5295]

Great video! the other thing we have found for flashing charger light is if the 4 pin XLR connector screw comes loose, the wires will often break - if the blue wire is not connected, solder it back on and the charger will often stop flashing.

[@woofer1772]

Thank you. I too had a flashing charger issue. I read your comment and checked my connector. With me it was the red wire that broke. Soldered it back on and the problem was gone. Excellent.

[@madrian_hello]

Many thanks for the video, it helped me a lot. I did a capacity test, but somehow S3 was more discharged than others. After charging little bit it now works.

[@FlynnTheRedhead]

How did you charge it?

[@arieblummel3540]

thanks for this video. did not understand everything . took my batterie apart and unscrwed + and - and plus of regulator.then I used a 30 volt charger 400mah and started charging.
after about half an hour i measured 3.2 volt.then i started charging with origionl charger and it worked perfect.now it is 4volt tried it in bike and its almost full 4leds.

[@kamak24]

Which Charger did You use ??

[@cbyvo]

Thanks for this video. Its very helpfull to see at least the inside, to discover that those are just 18650 cells. In my case there is a different problem (no charging at all, the charger thinks the batteries are 'full' while they aren't). I have to do some measurements to figure out what is going wrong.

[@EVCustoms]

Thanks man, Give an external Voltage at 24V once the battery voltage reach to 3.2V per cell the power supply will see the battery..

[@petergeerlings7558]

Thanks. By the way, a small detail, the fuse is 40A, not 30A.

[@alanuniacke4307]

Wherabouts is the located

[@paparazzi025]

Thank you for the video. I have this question. When diagnosing a battery, there are two errors. The first LED flashes on the first and fifth test. How to reset these errors on the BMS board?

[@shapedbywhatwelove8675]

how do you charge that one battery that is too low? what do you use do you take it out?

[@thesufi]

No, need to disassemble, just locate and apply 4.2V across the the + and - of that bank alone while monitoring it. When it matches the voltage of the other banks, stop charging.

[@Rossn8er]

Does anyone know the wiring schematic? I cant find a charger for this 4 pin XLR so can I switch the connectors to 3 pin XLR? If so which wires can I combine. I think Black & White read Negative. Red & blue read positive.

[@mohamede5888]

I had the second cell which had 2.9 v I charged every cell to 3.4v but still flashing. Maybe i should charge the whole battery with another battery i have. Don't have 24v adapters.

[@jeder_tanzt]

Can someone explain the third selucion?

[@404blakson]

I need the charger where can I get one for this battery pack

[@alanuniacke4307]

Did you manage to get hold of a Charger and what voltage.

[@404blakson]

@@alanuniacke4307 no.....

[@thesufi]

In the following video another guy managed to repurpose a 29.2V laptop charger:
czcams.com/video/vSxspe55vE8/video.html
This generic 29.4V e-bike one would most likely work as well but in either case you'll also have to source a 4-pin XLR plug for it. The wiring is explained in the video I linked above.
www.ebay.co.uk/itm/313382225179?hash=item48f709451b%3Ag%3ARdEAAOSwplBgAWTe

[@Hamid9e]

How could you be sure the cells wasnt bad?

[@EVCustoms]

in this case there are no damaged batteries. This problem comes from a problematic BMS (battery management system)

[@Hamid9e]

EV - Customs oh ok. And If the cell group was much higher than other, then it would probably be bad cells.

[@EVCustoms]

Yes because bad cells charging faster than good cells.

[@Hamid9e]

EV - Customs oh okay thank you!

[@Hamid9e]

By the way, how do we know that bms is bad, and has to be replaced?

[@user-yv4mq4wt6k]

Bună ziua șieu am obatetie de bicicleta electrica la fel că dumneavoastră nu știu de ce nu merge îmi puteți da un sfat

[@tonechavi2760]

Can't play the video

[@tonychavez4056]

I could now!!
Those last suggestions blew me away. Guess time to learn more things!