Hi,
I am planning to use the bq7791506 protection and management IC for the BMS that my company is developing. I have a few clarification regarding the IC. Could someone help with those?
1) We are looking to use this IC up to 200A continuous discharge current and 60-80A charge current. Do the charge overcurrent and discharge overcurrent protection limits support this if the sense resistor is sized accordingly & the CFET/DFET driver output can support larger MOSFET gate current?
2) We will be requiring the balancing current to be around 200mA and will be sizing the external balance MOSFETS and resistors accordingly but want to confirm that the Balance FET Drivers in the IC can be used for external operation and that the Balance FET drivers will be able to handle the higher balance FET size and hence gate current
3) Is there a max limit on the number of single ICs that can be cascaded for higher cell systems.
4) As per the datasheet, the overvoltage protection threshold for the particular IC is 3.8V, we are looking for a threshold of 3.6V. Is there some IC in the same lineup with this threshold as it is a standard threshold for LiFePO4?
5) We are looking to have a base 12V battery design and are looking at potential applications to support independent multiple 12V batteries in series to make a complete 24/36/48 V system. Are there any inherent issues in doing this? Please note that the single 12V blocks will be independent battery+BMS blocks.
Thanks,
Darshil Dharod
email: darshildharod@gmail.com / coulomblitech@gmail.com
