Osman
1 µW
- Joined
- Nov 17, 2019
- Messages
- 1
Hi everyone,
It's my first time posting on this forum. I've actually gotten alot of help here. I live in Asia, Pakistan because of which I can easily get parts for my build from AliExpress as China is a neighboring country to us. So I'm building a battery for a 48v 1000w ebike conversion kit. This is my first build and I'm planning on using Samsung 35e cells (3500 mah capacity, 8a max continuous discharge current). Its gonna be a 13s 3p configuration, so 3 cells in parallel and 13 cells in series, so total current of the battery is 3x8=24 amps. So it is gonna be a 48V 10.5AH 24A battery. I'm gonna be using a hailong battery case (the shark type) and a 3A charger (also from Aliexpress). The controller is rated for 15 amps but I wanted the battery to have more current limit than the controller as a safety feature and also to prevent it from overheating.
Then I was looking for other components of the battery like the bms and charger when I found a good BMS vendor on aliexpress, but the problem is that they don't have a 24amp bms, they have 15 amp, 20amp, 30amp and higher till 60 amps. Now my question is what current bms should I get, the 30 amp one? Is it okay to use bms with higher current than the battery?
I'd really appreciate if someone helped me out
P.S I've also attached pics of my bike if anyone wants to give any suggestions on my build...
Here are the links to the components:
Ebike conversion kit:
https://s.click.aliexpress.com/e/sKYy4meM
Battery case:
https://s.click.aliexpress.com/e/CQtso7pQ
BMS (Battery Management System):
https://s.click.aliexpress.com/e/MShXYq2U
Battery charger (3 amps)
https://s.click.aliexpress.com/e/EYc2PaLA
Bike I'll be using for the build:
https://drive.google.com/folderview?id=12EEaTEcw8WgQd5kPuYPBAtUJz8RnTOPq
Controller pic:
https://drive.google.com/file/d/11Ftms6DFRElijvbI3hatx8UfwTQMWz7e/view?usp=drivesdk
Samsung INR 18650 35e datasheet:
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.orbtronic.com/content/samsung-35e-datasheet-inr18650-35e.pdf&ved=2ahUKEwj-wraFyPblAhVQ-YUKHSyyCI4QFjAAegQIARAB&usg=AOvVaw3zwZ69qzuUrz793QQyJJfb&cshid=1574176624821qqq
It's my first time posting on this forum. I've actually gotten alot of help here. I live in Asia, Pakistan because of which I can easily get parts for my build from AliExpress as China is a neighboring country to us. So I'm building a battery for a 48v 1000w ebike conversion kit. This is my first build and I'm planning on using Samsung 35e cells (3500 mah capacity, 8a max continuous discharge current). Its gonna be a 13s 3p configuration, so 3 cells in parallel and 13 cells in series, so total current of the battery is 3x8=24 amps. So it is gonna be a 48V 10.5AH 24A battery. I'm gonna be using a hailong battery case (the shark type) and a 3A charger (also from Aliexpress). The controller is rated for 15 amps but I wanted the battery to have more current limit than the controller as a safety feature and also to prevent it from overheating.
Then I was looking for other components of the battery like the bms and charger when I found a good BMS vendor on aliexpress, but the problem is that they don't have a 24amp bms, they have 15 amp, 20amp, 30amp and higher till 60 amps. Now my question is what current bms should I get, the 30 amp one? Is it okay to use bms with higher current than the battery?
I'd really appreciate if someone helped me out
P.S I've also attached pics of my bike if anyone wants to give any suggestions on my build...
Here are the links to the components:
Ebike conversion kit:
https://s.click.aliexpress.com/e/sKYy4meM
Battery case:
https://s.click.aliexpress.com/e/CQtso7pQ
BMS (Battery Management System):
https://s.click.aliexpress.com/e/MShXYq2U
Battery charger (3 amps)
https://s.click.aliexpress.com/e/EYc2PaLA
Bike I'll be using for the build:
https://drive.google.com/folderview?id=12EEaTEcw8WgQd5kPuYPBAtUJz8RnTOPq
Controller pic:
https://drive.google.com/file/d/11Ftms6DFRElijvbI3hatx8UfwTQMWz7e/view?usp=drivesdk
Samsung INR 18650 35e datasheet:
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.orbtronic.com/content/samsung-35e-datasheet-inr18650-35e.pdf&ved=2ahUKEwj-wraFyPblAhVQ-YUKHSyyCI4QFjAAegQIARAB&usg=AOvVaw3zwZ69qzuUrz793QQyJJfb&cshid=1574176624821qqq
