meanjeans
New member
- Joined
- Nov 9, 2020
- Messages
- 5
Hello All,
I am new to DIY batteries and new to the forums as well. I'm having some trouble with (what I believe to be) a very simple battery pack and overall project and I think I might be missing something.
I'm building a small bluetooth speaker system (links to all components below) and the amp runs on 18 to 24 volts. I decided to add a 6S 18650 battery pack into the system and everything seemed to work fine through one charge of the battery. I bought the cells (Samsung 25R) from Liion Wholesale and soldered them to the BMS. I've read you have to be careful soldering to the batteries and I think I did a decent job of being quick with the iron and got everything put together. Each cell was reading 3.56v after assembly. I connected the charger I bought and it indicated that it was charging with a red light, and I watched the voltage creep up on individual cells.
The speaker was used several times over the next few days until it ran out of battery. I plugged the charger in, left if for a few hours, red light changed to green and unplugged the charger. The speaker would not turn on.
I took everything apart and the battery was reading ~13 volts but when I tested each cell I had three with nearly 0 volts and three at 4.6 volts. From what I gathered reading elsewhere, I have 6 cells that I should throw away. How did I get to this point? Any guidance would be appreciated!
Charger
BMS
Amp
Here is the schematic:
Thanks!
- Josh
I am new to DIY batteries and new to the forums as well. I'm having some trouble with (what I believe to be) a very simple battery pack and overall project and I think I might be missing something.
I'm building a small bluetooth speaker system (links to all components below) and the amp runs on 18 to 24 volts. I decided to add a 6S 18650 battery pack into the system and everything seemed to work fine through one charge of the battery. I bought the cells (Samsung 25R) from Liion Wholesale and soldered them to the BMS. I've read you have to be careful soldering to the batteries and I think I did a decent job of being quick with the iron and got everything put together. Each cell was reading 3.56v after assembly. I connected the charger I bought and it indicated that it was charging with a red light, and I watched the voltage creep up on individual cells.
The speaker was used several times over the next few days until it ran out of battery. I plugged the charger in, left if for a few hours, red light changed to green and unplugged the charger. The speaker would not turn on.
I took everything apart and the battery was reading ~13 volts but when I tested each cell I had three with nearly 0 volts and three at 4.6 volts. From what I gathered reading elsewhere, I have 6 cells that I should throw away. How did I get to this point? Any guidance would be appreciated!
Charger
BMS
Amp
Here is the schematic:
Thanks!
- Josh