Can I charge with this BMS through the P- discharge terminal?

[WarIsOver]

I'd like to have only a single charge/discharge connector on my battery pack. Do I need to get another BMS or can I just ignore the CH- charging terminal and charge through the P- instead?

 

[hemo]

You need to buy a same /common port BMS.

https://www.aliexpress.com/item/32875971231.html?storeId=4165007&spm=2114.12010612.8148356.2.5f563955mbqJJ4

 

[kuririkura]

On this type of BMS, what will happen if the output (P-) meet with another battery or power source with higher voltage?

Will it block the current from the bigger source? (One way output only)

 

[fechter]

On this type of BMS, what will happen if the output (P-) meet with another battery or power source with higher voltage?

Will it block the current from the bigger source? (One way output only)

No, not unless individual cell voltages get out of whack enough to make it trip. Normally it will behave like a switch that is on.