BQ40Z50-R2: Gas Gauging and Cell balancers that can use 12.8V cells (battery packs) with BQ40Z50 or equivalent

Hello,

I believe the bq34z100 has the functionality to do this. More information can be found below:

https://www.ti.com/product/BQ34Z100 

Regards,

Anthony

Hello,

In the case of the BQ34Z100, does it require an external IC for balancing?
And if so, which IC would be best?

Hello,

Yes, the usage of bq34z100 requires a monitor for cell balancing. Typically, we recommend using the bq76952, more information regarding this device can be found below to see if it meets your application specifications.

https://www.ti.com/product/BQ76952 

Regards,

Anthony

Hello
Thank you for your reply.
I'm planning to use two battery packs for the BQ76952.
Will that be a problem?
Also, will I be able to connect the BQ40Z50-R2 and use it as a gas gauge?

Hello,

What is the voltage of the two battery packs being attached? I believe the maximum recommended voltage to attach to the individual cell connections of the bq40z50 is 5V.

Regards,

Anthony

Hello
Sorry, my question was about combining BQ76952 and BQ34Z100.
The battery packs to be connected are 12.8V (20000mA) and two connected (25.6V).
It seems that BQ76952 has more than three cell connections, but would it be okay to connect two?

Hello
Also, the battery pack is two LiFePO4 (12.8V) in series.
If the gas gauge function is available in the BQ76952, I don't think the BQ34Z100 is necessary.

I'm thinking of using the following parts configuration.
Is this OK?
It will consist of BQ76952 and BQ34Z100.

Hello,

Please allow me to loop in someone from our monitors team to confirm your questions regarding bq76952.

Regards,

Anthony

Understood. I will check the reference for the GAS GAUGE. Also, should I ask on the BQ76952 website if I can connect only two batteries to the BQ76952?

12.8V (20000mA) and two connected (25.6V).