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:
Select a block to discover products for your design
Title | Category | Buy / Sample |
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ISL94212 Multi-Cell Li-Ion Battery Manager
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Battery Front End ICs | Buy / Sample |
ISL8117 Synchronous Step-Down PWM Controllers
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Buck Controllers (External FETs) | Buy / Sample |
RL78/G14 Low Power, High Function, General Purpose Microcontrollers for Motor Control, Industrial and Metering Applications
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RL78 Low Power 8 & 16-bit MCUs, MCU / MPU Selection Table | Buy / Sample |
ICL3221E ±15kV ESD Protected, +3V to +5.5V, 1µA, 250kbps, RS-232 Transmitters/Receivers
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RS-232 Serial Interface | Buy / Sample |