BQ76952: Connected in parallel to achieve higher current

Hi Sergei,

If you're looking to have a higher output current, you may change the value of the sense resistor to fine-tune where the current protections trigger.

Here are some sections of the datasheet may be helpful for your query:

Section 10.3: Coulomb Counter and Digital Filters (specifically the first two paragraphs)

Section 10.10: Current Calibration

Section 16.2.2: Detailed Design Procedure (specifically the Sense resistor selection portion)

Section 18.1: Layout Guidelines (specifically the first bullet point)

I hope this helps!

Regards,

Max Verboncoeur

Hi Max,

Thank you very much for your answer. I'm sorry, maybe I didn't phrase my question clearly enough.

You are writing about ways to increase the output current when using a single BQ76952 IC. In our solution, we are trying to understand whether it's possible to create a scalable energy storage system. For instance, if the end user doesn't have enough energy stored in one battery pack, we can propose the use of an additional battery pack to double the stored energy (by connecting the battery modules in parallel). If using two battery packs is still insufficient, then we suggest using a third module (also connected in parallel), and so on. Each battery pack contains its own BQ76952 IC. The question is to determine the maximum number of battery packs that can be connected in parallel.

Hi Max,

Thanks for your reply.