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Renesas Electronics ISL94212 Multi-Cell Li-ion Battery Manager ICs

Renesas ISL94212 Multi-Cell Li-ion Battery Manager ICs are designed to perform accurate monitoring, cell balancing, and extensive system diagnostics functions. These ICs can supervise up to 12 series connected cells. The ISL94212 ICs feature three cell balancing modes, including manual balancing mode, auto balance mode, and timed balancing mode. When a charge transfer value has been met, the auto balance mode terminates balancing functions. Renesas ISL94212 communicates to a host microcontroller via an SPI interface and to other ISL94212s using a robust, proprietary, two-wire daisy chain system. Typical applications include light electric vehicle (LEV), energy storage systems (ESS), solar farms, portable, and semi-portable equipment.

Features

  • Up to 12-cell voltage monitors, support Li-Ion CoO2, Li-Ion Mn2O4, and Li-Ion FePO4 chemistries
  • ±10mV cell voltage measurement accuracy
  • 13-bit cell voltage measurement
  • ±180mV pack voltage measurement accuracy
  • 14-bit pack voltage and temperature measurements
  • Cell voltage scan rate of 19.5µs per cell (234µs to scan 12 cells)
  • Up to four external temperature inputs
  • Robust daisy chain communications system
  • Internal temperature monitoring
  • Up to four external temperature inputs
  • Integrated system diagnostics for all key internal functions
  • Hardwired and communications-based fault notification
  • Integrated watchdog shuts down the device if communication is lost
  • 7µA shutdown current
  • 2Mbps SPI

Applications

  • LEV
    • E-Moto
    • E-Bike
  • ESS
  • Solar farms
  • Portable and semi-portable equipment

Block Diagram

Block Diagram - Renesas Electronics ISL94212 Multi-Cell Li-ion Battery Manager ICs

Application Circuit

Application Circuit Diagram - Renesas Electronics ISL94212 Multi-Cell Li-ion Battery Manager ICs
Published: 2019-03-13 | Updated: 2023-09-29