Hi!
I'm building li-ion battery 30S4P and i need an BMS for that (preffered with some wired interface to get voltage of every cell). There are some on ali (https://www.aliexpress.com/item/1005002502679730.html) with dimensions 180x110x10 but i'm using the Gainta G3028 box and there is free space 135x80x20.
So, i want to build BMS my own with next functions:
To balancing i can to use the HY2213-BB3A, but there is MCU (STM32) in my board so i can to implement the balancing logic on that (open transistor to discharge cell).
Temperature, voltage and short circuit will implemented on an STM32 too.
But how can i measure voltage of every cell? Using ADC of STM is a bad idea because max voltage is 126V and will power leak on res divider. May be is there some cheap MC to do that?
I'm building li-ion battery 30S4P and i need an BMS for that (preffered with some wired interface to get voltage of every cell). There are some on ali (https://www.aliexpress.com/item/1005002502679730.html) with dimensions 180x110x10 but i'm using the Gainta G3028 box and there is free space 135x80x20.
So, i want to build BMS my own with next functions:
- Monitoring voltage of every cell.
- Monitoring temperature.
- Balancing.
- Under and over voltage protection.
- Short circuit protection.
- Serial interface.
To balancing i can to use the HY2213-BB3A, but there is MCU (STM32) in my board so i can to implement the balancing logic on that (open transistor to discharge cell).
Temperature, voltage and short circuit will implemented on an STM32 too.
But how can i measure voltage of every cell? Using ADC of STM is a bad idea because max voltage is 126V and will power leak on res divider. May be is there some cheap MC to do that?