SLUAAW0 May   2025 BQ41Z50

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Authentication Scheme Comparison
  6. 3ECC Key Programming Within the Pack Manufacturing Flow
  7. 4Gauge Authentication Flow of the BQ41z50 Product Family
  8. 5Host Authentication Flow of the BQ41z50 Product Family
  9. 6Authentication Flow in BQSTUDIO
  10. 7Summary
  11. 8References

4 Gauge Authentication Flow of the BQ41z50 Product Family

The authentication process can be performed by the pack manufacturer or assembly house to make sure a complete, authenticated battery pack is constructed. The authentication flow is visualized in the Figure 4-1 diagram using the SMBus ManufacturerAccess( ) (MAC) commands to the gauge.

An overview of the flow is:

  1. Host Reads ProdKpub from Gauge
  2. Gauge Authentication
    • Host send challenge message to gauge
    • Gauge signs the message with ECC-233
    • Gauge provides r/s to host
    • Host verifies the signature
Gauge Authentication Overview Figure 4-1 Gauge Authentication Overview

A more detailed implementation flow chart is shown in Figure 4-2.

Gauge Authentication Flow Chart Figure 4-2 Gauge Authentication Flow Chart