LMV7231: Can it be used to provide OV and UV protection for 6s batteries?

Hi Abraham,

you haven't shown what you plan to do with the local ground pins of the two LMV7231. Connecting to the local battery grounds or to a global ground?

And what is your OR scheme looking like?

Kai

Hi Kai,

Thanks for your reply!

I use local ground for both LMV7231, so if I'm protecting 12 cells in series, then the lower LMV7231 ground will be connected to the ground of the lowest cell and the upper LMV7231 ground will be connected to the ground of 7th cell. 

For OR circuit, I will use isolation. My main concern is that for each LMV7231, can the inputs be differential? IN+6 and IN-6 won't be referenced to GND as in datasheet

Thanks Abraham for your question and Kai for your continued support.

Unfortunately, all of the inputs for the LMV7231 are monitored with respect to ground since they are compared to an internal reference that is ground referenced.

Chuck

Hi Abraham,

I would probably do it this way:

Kai

Clever level shifting Kai

Only other option I could think of is to use comparators that can handle the full voltage range of all the cells in series.  This way everything could still be monitored with respect to ground with the use of resistor dividers.

Chuck