Hello,
I just put together my DIY E-bike and i have an issue with my BMS. It wont output any power from P- or C- , therefore I cannot even power on my ESC, the battery is fully charged, all individual cell pairs are at 4.3v, whole pack is at about 55v and all balance connectors are connected. I have no idea why that is.
*The motor runs when connected directly to the battery (skipping the BMS)
*Charging works thourght the BMS (through its P- and not C-)
*When connecting the battery + to ESC + and BMS P- to ESC - there is a huge voltage drop from around 53v to around 5 - 10v and ESC
won't turn on
The BMS is most likely the problem, its a cheap one bought from banggood.
https://www.banggood.com/13S-35A-48V-Li-ion-Battery-Protection-Board-BMS-PCB-with-Balance-For-E-bike-Scooter-p-1286039.html?
Also: On the sellers page a picture is included where it shows to connect the negative charge cable to C- on the BMS but when doing so the batteries don't charge.
I just put together my DIY E-bike and i have an issue with my BMS. It wont output any power from P- or C- , therefore I cannot even power on my ESC, the battery is fully charged, all individual cell pairs are at 4.3v, whole pack is at about 55v and all balance connectors are connected. I have no idea why that is.
*The motor runs when connected directly to the battery (skipping the BMS)
*Charging works thourght the BMS (through its P- and not C-)
*When connecting the battery + to ESC + and BMS P- to ESC - there is a huge voltage drop from around 53v to around 5 - 10v and ESC
won't turn on
The BMS is most likely the problem, its a cheap one bought from banggood.
https://www.banggood.com/13S-35A-48V-Li-ion-Battery-Protection-Board-BMS-PCB-with-Balance-For-E-bike-Scooter-p-1286039.html?
Also: On the sellers page a picture is included where it shows to connect the negative charge cable to C- on the BMS but when doing so the batteries don't charge.