headway 72v20A bms or pack problem

[stradivarius]

i would like to buy a batterie pack headway 72V20A (38120 cell) does anybody have try them or know if its a really good cell and bms.

i have few information about the poor quality of the bms. Victoria told me this pack is not really good. she told me its better to use 48V20A max discharge 80amps.

thanks

 

[Mark_A_W]

Do you mean Amp Hour (Ah), not Amp (A)?


They are the same cells. If you want to go really fast, get a 72v pack. If you want to go normal speed, get a 48v pack.


Most of us don't have room for 20Ah packs. That's 32 or 48 cells.

 

[dogman dan]

72v 20 ah sure is a big pile of cells to carry. The cells are good, but I can't say I know a bms solution. I'd think though, that 48v and a 50 amp controller is enough performance for most people. Is this for a dirt bike of some kind? Or a motorcycle? Lots of the bigger than bike size battery users are just using cell monitoring and logging devices instead of a bms, since high volt, high amp bms gets so dang expensive. Lots of good discussion of that on a thread Morph started here in the battery section. The Jack Rickard thread.

 

[patrickza]

My 72v bms's from headway (Victoria) puts out 90 amps without tripping, not sure what the actual limit is because I've never reached it. I've read somewhere that they are 100 continuous, 400 peak but that sounds very high. Either way, it works perfectly for me, no idea why Victoria would say any different.

Just curious why you need so much range, or are you building something different?

 

[stradivarius]

72V20Ah max discharge 100amps

Do you mean Amp Hour (Ah), not Amp (A)?


They are the same cells. If you want to go really fast, get a 72v pack. If you want to go normal speed, get a 48v pack.


Most of us don't have room for 20Ah packs. That's 32 or 48 cells.