BQ76952: Support for 48V Battery HW Architecture for UL1973 Compliance with no Safety Critical Software

Alec Fremier

Part Number: BQ76952

Tool/software:

I am looking to use the BQ76952 battery monitor to create a HW architecture for a low cost 48V battery BMS that complies with the latest UL1973 certification requirements that, critically, does not require any safety-critical software. Is there a way to boost the diagnostic coverage of the BQ76952 using HW? Are there any ideas on using two BQ76952 for redundancy?

Can you provide recommendations or reference materials on compliant architectures? Is there a TI representative I could get in touch with directly?

6 months ago

+1 Alexis_H 6 months ago

TI__Genius 17775 points

Hello Alec,

These reference designs may be useful for a 48V battery BMS design:
1. https://www.ti.com/tool/TIDA-010208
2. https://www.ti.com/tool/TIDA-010216

The certifications all our parts go through is listed here. Our devices go into a huge variety of applications. Our customers pass a wide variety of standards, so we do not cater to a single standard, and we do not cater to any particular one either.

Section 11.1 Diagnostics Overview in the Technical Reference Manual explains more on what our part has to offer for diagnostics.

Alec Fremier said:
Are there any ideas on using two BQ76952 for redundancy?

We have seen a customer occasionally bring up the idea, but we do not have reference designs ourselves to offer.

A TI Representative will reach out to you.

Best Regards,
Alexis

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BQ76952: Support for 48V Battery HW Architecture for UL1973 Compliance with no Safety Critical Software