SLUAAL7 September   2022 BQ35100

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2EVM and System Setup
  5. 3Enabling EOS Mode
    1. 3.1 Steps for Enabling EOS Mode
  6. 4I2C Communication Between the Microcontroller and the BQ35100 EVM
  7. 5Testing Procedure
  8. 6EOS Data Example
  9. 7Final Configuration of the BQ35100 Data
  10. 8Conclusion
  11. 9References

6 EOS Data Example

Figure 6-1 shows an example of the impedance data that is collected by the gauge. This data shows a lithium thionyl battery starting at full capacity to be completely discharged. Towards the end of the battery’s life, there is a spike in the impedance which is characteristic of lithium thionyl chloride batteries and a strong indicator that the battery is nearing the end of battery life.

For testing purposes, the battery was discharged by 1% SOH at the maximum continuous discharge rate specified by the battery manufacturer after each learning pulse. After the 1% SOH discharge the battery was relaxed for 5 hours. Each learning pulse was 500 ms long and the current was set to 100 mA to meet the requirements of the pulse length and amplitude.

GUID-A04CA43E-CF20-4394-A814-CE18FF0D1AB4-low.png Figure 6-1 Scaled Resistance Profile of LS14500 Battery with EOS Flag Thresholds