Renesas Electronics Corporation, a supplier of advanced semiconductor solutions, has launched integrated battery management system (BMS) solutions for lithium-ion (Li-ion) battery packs used in a variety of portable and light electric applications — including e-bikes, robotics, drones, vacuum cleaners, and other battery-powered consumer and industrial devices.
The new R-BMS F (Ready Battery Management System with Fixed Firmware) platforms are designed to reduce development complexity and accelerate time to market.
They support 2–4 cell (S) and 3–10 cell series Li-ion configurations and include fuel gauge ICs (FGICs), an integrated microcontroller, analog front-end circuitry, and pre-tested firmware. Renesas also provides software tools, a GUI for customization, and full documentation bundled into complete evaluation kits that are available now.
Pre-validated firmware
The R-BMS F firmware is pre-programmed to handle critical battery management functions such as cell balancing, current control, and voltage and temperature monitoring. This enables developers (particularly those without in-depth MCU programming expertise) to configure parameters and adapt the system for different cell chemistries using a graphical interface, avoiding the need for a full development environment.
This approach supports the safe operation of lithium-ion batteries by actively monitoring key metrics such as state of charge (SoC), state of health (SoH), and fault conditions. The system is suitable for e-mobility designs and energy storage devices that require robust, power-efficient battery management without starting from scratch.
Evaluation kits
The R-BMS F platform is available in two evaluation kits:
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2–4 Cell Series Kit (RTK0EF0163DK0002BU): Designed for lower-voltage applications (~8V–16V) such as robotic vacuums, small appliances, and medical devices, powered by the Renesas RAJ240055 FGIC.
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3–10 Cell Series Kit (RTK0EF0136DK0002BU): Designed for higher-voltage applications (~12V–40V) such as e-bikes, light electric mobility, and industrial tools, using Renesas RAJ240100 and RAJ240090 FGICs.
Each kit includes USB SMBus interface tools, parameter-setting software, cables, and all necessary documentation—including schematics and engineering BOMs. The analog front-end measures voltage, current, and temperature while managing external components; the embedded microcontroller manages digital control and safety logic.
Renesas continues to integrate these BMS solutions into its broader portfolio through reference designs such as its USB-PD battery charging system and Wall-to-Battery Energy Storage architecture, enabling scalable and energy-efficient designs for future electric mobility and portable applications.
Filed Under: BMS, Technology News