BQ35100 Lithium Primary Battery Fuel Gauge and End-Of-Service Monitor

1 Features

• Fuel gauge and battery diagnostics for flow meter applications predict end-of-service or early battery failure
  • Supports lithium thionyl chloride (Li-SOCl₂) and lithium manganese dioxide (Li-MnO₂) chemistry batteries
  • Accurate voltage, temperature, current, and coulomb counter measurements that report battery health and service life
  • State-of-health (SOH) algorithm for Li-MnO₂
  • End-of-service (EOS algorithm for Li-SOCl₂)
  • Coulomb accumulation (ACC) algorithm for all battery types
• Ultra-low average power consumption to maximize battery run time
  • Gauge enabled through host-controlled periodic updates
  • State-of-health (SOH) ~0.06 µA
  • End-of-service (EOS) ~0.35 µA
  • Coulomb accumulation (ACC) diagnostic updates ~0.3 µA
• System interaction capabilities
  • I²C host communication, providing battery parameter and status access
  • Configurable host interrupt
  • Battery information data logging options for in operation diagnostics and failure analysis
  • SHA-1 authentication to help prevent counterfeit battery use