SLUAAH5 November   2022 BQ25171-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1 Introduction
  4. 2 Li-Ion Overview
  5. 3 Li-Ion Applications
  6. 4 LiFePO4 Overview
  7. 5 LiFePO4 Applications
  8. 6 NiMH Overview
  9. 7 NiMH Applications
  10. 8 Super Capacitors
  11. 9 Super Capacitor Applications
  12. 10Summary
  13. 11References

7 NiMH Applications

Similar applications as previously discussed apply to NiMH batteries. The advantage of higher peak currents and lower operating temp expands the options. If we were to look at a battery back up applications using NiMH then a timer based charge profile can work well. Low charge current for larger cells that can support higher current for the application.

The BQ25171-Q1 and BQ25172 support NIMH timer based charge with timer options from 4 to 22 hr. Below is a typical charge profile without recharge feature.



Figure 7-1 BQ25171 NiMH Charge Profile with 4 S FDK HR-AAULT Cells. 8 hr Timed Charge at 200 mA