Renesas Electronics Battery Management System
Renesas Electronics Battery Management System is comprised of many functional blocks, including cutoff FETs, a fuel gauge monitor, a cell voltage monitor, a cell voltage balance, a real-time clock (RTC), temperature monitors, and a state machine. 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 reference design employs an ISL94212 Li-ion battery manager IC, which manages up to 12 series of connected cells. The device produces 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.
Features
- Highly integrated MCU
- Supports both standalone and daisy-chained configurations
- GUI provided export option for generation of detailed register and/or SPI communications log files
Block Diagram
FEATURED PRODUCTS
Renesas Electronics ISL8117 Synchronous Step-down PWM Controllers
Synchronous buck controllers that generate POL voltage rails and bias voltage rails.
Renesas Electronics RL78 Low Power 8-Bit & 16-Bit Microcontrollers
Ultra lower power MCUs with an extensive range of powerful peripheral functions.
Renesas Electronics ICL3221E RS-232 Interface ICs
3.0-5.5V powered RS-232 transmitters/receivers that meet ElA/TIA-232 and V.28/V.24 specifications.
Renesas Electronics ISL94212 Multi-Cell Li-ion Battery Manager ICs
Perform accurate monitoring, cell balancing, and extensive system diagnostics functions.
Additional Application Solutions
See how Renesas' complementary product portfolios of Analog + Power + Embedded Processing work together to deliver comprehensive solutions.