SLUAAR3 December   2023 BQ27426 , BQ27427 , BQ27Z561 , BQ27Z746 , BQ28Z610 , BQ34Z100 , BQ40Z50 , BQ40Z80

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Voltage Correlation
  6. 3Voltage + IR Correction
  7. 4Coulomb Counting
  8. 5CEDV
  9. 6Impedance Track
  10. 7Algorithm Comparisons
    1. 7.1 Calculating SOC Error
      1. 7.1.1 Calculating True SOC
      2. 7.1.2 Finding Calculated SOC for Voltage Correlation & Voltage + IR Correction
      3. 7.1.3 Finding Calculated SOC for Coulomb Counting
    2. 7.2 Comparing SOC Error
  11. 8Summary
  12. 9References

7 Algorithm Comparisons

For this comparison, a robot vacuum cleaner was used to collect voltage and current data during normal operating use. The test environment involved the robot using a 4S2P battery to vacuum and mop at room temperature. Two tests were conducted, showcasing two different load profiles. For the first test, the robot vacuumed low pile carpet. Figure 7-1 shows the voltage and current profile for the test.

GUID-2D94F2E9-B3F7-4A61-8D32-1679ED0F6DC6-low.png Figure 7-1 Voltage and Current Profile for Test 1

During the second test, the robot mopped tile floors. The robot can return to the base to re-wet the mops and charge the battery for a short period. Figure 7-2 shows the voltage and current profile for this test.

GUID-A1AD0248-736D-4A11-A718-514FDDBDAB9E-low.png Figure 7-2 Voltage and Current Profile for Test 2