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Battery management circuit

Maltais14

New Member
Hey I am a newbie.
Im tired of hard to find management systems so i wanna learn, so far i am re**rded.
If anyone with free time could consult me a bit i would appreciate it a lot.
i want a management system at least with low voltage cut off since i have no problem using specific chargers but charging circuit would also be nice and balancing.
Battery is lifpo4 6 cells 3.2v 15a big ass cells.
i want them for a 200w Bluetooth speaker. i guess i also need some kind of voltage regulator so i don't drop wattage when discharging.
the amp is cheapest 200w with pops. sub and a full range and tweeter 2 passive rads.
AI recommends me BQ7692000PW and it seems good but it needs i think a comparator but i am not sure since all diagrams say host or some IC.

as much as i understand i need a voltage divider which i can make from resistors and then a voltage regulator also a competitor and a MosFet for switching. and then something for monitoring the cell voltage.
I just wanna make sure i buy all the necessary parts and they can take the 15A.
also a schematic would be nice
i will add the ones i took a look at and didn't completely understand.
Thanks in advance.
I am sorry for duplicate thread others were for low current and 1 cell as much as i saw.
8308.bq24753a_selection.png-2460x0.png
 

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I cannot see any balancing circuit in the schematic. Add a balancing circuit for the 6 cells, either using an external IC (e.g., BQ76920 or BQ76200) or discrete components. Your battery pack is a 6-cell LiFePO4 configuration (3.2V nominal per cell), meaning a total nominal voltage of 19.2V and a max charge voltage of ~21.6V. Check if the OVPSET (over-voltage protection setpoint) and SRSET (current limit) resistors are correctly calculated to support these values. If you want to see some more BMS circuits for more references, you can see one here: https://www.pcbway.com/project/shareproject/bq40z50_r2_BMS_4S_681f1491.html
 

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