SLYT803B october   2020  – october 2020 BQ24610 , BQ25713 , BQ25790 , LM66100 , LM74700-Q1

 

  1.   1
  2. 1 Introduction
  3. 2 Understanding Battery Packs
  4. 3 Stackability Requirements for Battery Packs
  5. 4 A Multibattery Management System Design
  6. 5 Battery Charging
  7. 6 Battery Gauging and Protection
  8. 7 DC-to-DC Converter or Controller Stage (Boost or Buck-boost Stage)
  9. 8 ORing Control
  10. 9 Load Sharing
  11. 10Conclusion
  12. 11References
  13. 12Related Web Sites

3 Stackability Requirements for Battery Packs

Lithium batteries are dangerous. Depending on the battery capacity and number of cells, there are restrictions on their transportation by air—it is only permitted with a U.N. 38.3 certification according to the U.N. Manual of Tests and Criteria. International Air Transport Association Dangerous Goods Regulations specify the classification, marking, packing, labeling and documenting of dangerous shipments.

Designing a multibattery management system so that it is stackable helps meet shipping restrictions by enabling ultrasound scanner manufacturers to ship smaller-capacity batteries. By stacking these smaller batteries, designers can achieve a higher battery capacity which can provide longer back-up run times for equipment.