Overview

An automotive battery management system (BMS) is the “brain” of an electric vehicle battery pack, and its performance greatly affects the driving range and battery life of an electric vehicle. Renesas products are ideal for accurate and safe BMS applications.

This reference design operates as an example of a complete automotive battery management system for up to 70 series-connected Li-ion cells. The RH850 microcontroller (MCU) communicates with the ISL78714 multi-cell Li-ion battery manager devices to monitor cell voltage, pack temperature and current, record significant fault detection, and control cell balance. The ISL78714 contains daisy chain hardware to provide robust, isolated communication between batteries. The RH850 can interface to multiple CAN, LIN, UART, and RS-485 buses and control multiple PWM outputs. The reference design is based on the ISL78714BMS5XBEKIT1Z automotive-grade multi-cell Li-ion battery manager reference design kit.

For application models and software corresponding to the kit, visit the Automotive BMS Application Model & Software page.

System Benefits

  • Best BMS accuracy and long-term drift (LTD), which extend driving range and battery life performance, with superior accuracy of 2mV and 6 sigma LTD
  • Lowest BOM cost and best FuSa/EMI/EMC/hot-plug solution, which alleviates R&D effort and is easy to use with Renesas' RH850 MCU Family (with dedicated drivers and additional application software for BMS)
  • MCU line-up supporting functional safety features up to ASIL-D as well as required security features
  • Intelligent power device (IPD) for external load control
  • Complete assessment and development platform optimized for automotive battery management systems

System Block Diagram

Image
Automotive Battery Management System

Related Products

Product Description Featured Document Ordering
Boards and Kits with MCU      
ISL78714BMS5XBEKIT1Z Automotive-grade multi-cell Li-ion battery manager reference design kit User's Manual Short
User's Manual
(NDA Necessary)
Buy
       
Microcontroller      
RH850/P1M High-end microcomputer suitable for chassis systems that offers safety functions such as lockstep CPU, ECC, BIST (Built-in Self Test) and ECM (Error Control Module) Select Document Contact Sales
       
Battery Management IC      
ISL78714 Automotive-grade multi-cell Li-ion battery manager Datasheet Buy
       
Power Management      
RAA270005 Power management IC (PMIC) for the RH850/P1x (with built in voltage regulator for the MCU’s core) automotive microcontroller Datasheet Contact Sales
       
Intelligent Power Devices (IPD)      
uPD166031A 10mohm single-channel IPD with advanced protection method and high robustness against long term and repetitive short circuit condition Datasheet Contact Sales
uPD166032 12mohm single-channel IPD with advanced protection method and high robustness against long term and repetitive short circuit condition Datasheet Contact Sales
uPD166033 6mohm single-channel IPD with advanced protection method and high robustness against long term and repetitive short circuit condition Datasheet Contact Sales
uPD166034 8mohm single-channel IPD with advanced protection method and high robustness against long term and repetitive short circuit condition Datasheet Contact Sales
RAJ2800024 1.6mohm single-channel Automotive IPD with advanced protection method and high robustness against long term and repetitive short circuit condition Datasheet Contact Sales
RAJ2800034 2.5mohm single-channel Automotive IPD with advanced protection method and high robustness against long term and repetitive short circuit condition Datasheet Contact Sales
RAJ2800044 3.8mohm single-channel Automotive IPD with advanced protection method and high robustness against long term and repetitive short circuit condition Datasheet Contact Sales
       
Photocoupler      
RV1S2752Q Low input current transistor output photocoupler Contact Sales Contact Sales

Documentation

Title Type Date
PDF426 KB
Flyer

Videos & Training

Battery Management Solution for Electric Vehicles

In electric vehicles today, there are two key parameters, the state of health and the state of charge. Renesas' Battery Management Solution (BMS) device supports these parameters. This demonstration highlights Renesas' ISL78714 automotive-grade Li-ion battery manager IC and the RH850/P1M 32-bit automotive microcontroller (MCU). In addition to the ISL78714 battery manager IC and RH850 MCU, the demo board is supported by a host of other Renesas products including the RAA270005 power management IC (PMIC), RV1S2752Q photocoupler, and the uPD166031A/32/33/34 and RAJ2800024/34/44 integrated power devices (IPDs).

Image
Winning Combos

Winning Combinations for Automotive

Renesas' complementary automotive product portfolios of Analog + Power + Embedded Processing + Connectivity work together to deliver comprehensive solutions. Our product experts have developed "Winning Combinations," compelling product combinations that help our customers accelerate their designs and get to market faster.

Discover More Winning Combinations