A battery management system (BMS) can be comprised of many functional blocks, including cutoff FETs, fuel gauge monitor, cell voltage monitor, cell voltage balance, real-time clock (RTC), temperature monitors, and a state machine. There are also many types of battery management ICs available. The grouping of the functional blocks varies widely – from a simple analog front-end that offers balancing and monitoring, and requires a microcontroller (MCU), to a standalone, highly integrated solution that runs autonomously.

This design utilizes an ISL94212 Li-ion battery manager IC, which supervises up to 12 series of connected cells. The device provides accurate monitoring and three cell balancing modes – manual balancing mode, timed balancing, and auto balance mode with extensive system diagnostics functions. The BMS IC communicates to a host MCU via an SPI interface and to other BMS IC devices using a robust, proprietary, two-wire daisy chain system.

System Benefits:

  • Highly integrated MCU
  • Supports both standalone and daisy-chained configurations
  • GUI provided an export option for the generation of detailed register and/or SPI communications log files



Winning Combinations Interactive Diagram

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16:9 AS017 AS017 AS017 Up to 24 Cells Up to 24 Cells Up to 24 Cells Connector Line.534 Battery Manager 1 Battery Manager Battery Manager Battery Manager 2 Battery Manager Battery Manager PWM Controller PWM Controller PWM Controller RS-232 Transmitter/Receiver RS-232 Transmitter/Receiver RS-232 Transmitter/Receiver LOAD LOAD LOAD To Monitoring System To Monitoring System To Monitoring System Sheet.36 Sheet.37 Sheet.38 Sheet.39 Sheet.40 Battery.46 Sheet.42 Sheet.43 Sheet.44 Sheet.45 Line 1pt.1552 Line 1pt.1608 Relay.74 Sheet.49 Sheet.50 Sheet.51 Connector Arrow Connector Line Connector double arrow Connector double arrow.58 Connector Arrow.59 Connector Line.60 Connector Line.61 Ground Sheet.63 Sheet.64 Sheet.65 Sheet.66 Connector Line.67 Connector Line.68 Connector 1 Connector 1.70 Connector Line.71 Connector 1.72 Realized Using Mechanical Switch Realized Using Mechanical Switch Realized Using Mechanical Switch D SW D SW D SW Arrow-Right -45 MCU MCU MCU MCU VCC VCC VCC UART UART UART
Exiting Interactive Block Diagram