company blog about Recycle Renesas Battery Management Evaluation Board: Battery Charger, Battery Fuel Gauges

Recycle Renesas Battery Management Evaluation Board: Battery Charger, Battery Fuel Gauges

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I. Efficient Charging Management: From High Power to Highly Integrated Charging Evaluation Solutions

The core task of a charger evaluation board is to safely, efficiently, and flexibly deliver energy from an external power source to a battery pack. Renesas' solutions cover a broad spectrum of requirements, from consumer to industrial applications.

240W USB-C Complete Solution for High-Power Applications: The RTKA489EPRDK0000BU evaluation kit constitutes a 240W USB Type-C battery system integrating advanced safety features. It functions both as a sink device, drawing power from the USB-C interface to charge the battery, and as a source device, delivering battery energy to enable power bank functionality. Its standout feature lies in enabling users to effortlessly configure the number of series-connected cells (2-7 cells) and maximum charging current via on-board switches and accompanying software tools, significantly simplifying charging design for multi-series battery systems.

Highly Integrated Smart Buck-Boost Charger Evaluation: For common applications involving 2 to 4 cells, such as high-end notebooks or industrial tablets, the RAA489110 evaluation board demonstrates the exceptional performance of its chip. This configurable buck-boost charger accommodates a wide 4V to 30V DC input range, compatible with traditional adapters, USB PD, and other power sources. It supports On-the-Go (OTG) functionality, enabling power draw from the battery when required to deliver 5V output via the USB port. Engineers can programme dozens of parameters—including charge current and system voltage—through the SMBus interface for deep customisation.

II. Precise Status Monitoring: Pre-validated Firmware and Flexible Evaluation-Parallel Battery Meter Solutions

The battery meter serves as the ‘brain’ of the BMS, responsible for accurately estimating the battery's State of Charge (SoC), State of Health (SoH), and executing protective functions. Renesas' evaluation tools in this domain offer options ranging from ‘out-of-the-box’ to ‘deep customisation’.

Revolutionary R-BMS F: Rapid Development Platform with Pre-validated Firmware: This recently launched flagship solution from Renesas centres on pre-programmed, validated fixed firmware. It integrates all fundamental management algorithms—including battery state monitoring, cell voltage balancing, and fault detection. Developers need not write complex BMS control code from scratch; instead, they configure settings by adjusting key parameter thresholds via an intuitive graphical user interface (GUI), reducing learning and development time from months to weeks. The solution offers complete evaluation kits for 2-4 cell (based on RAJ240055, suitable for vacuum cleaners and robotic sweepers) and 3-10 cell (based on RAJ240090/100, suitable for electric bicycles and drones) batteries. The kits incorporate a resistive cell simulator, enabling rapid evaluation environment setup with minimal wiring.

Universal Battery Meter IC Starter Kit: For developers wishing to start from fundamentals or requiring innovation for specific algorithms, Renesas offers a universal battery meter IC starter kit. This kit includes an evaluation board, sample code, and necessary debug interfaces. Users can monitor battery status such as voltage, current, and temperature in real time via a USB-SMBus converter and PC application. It provides greater flexibility, suitable for preliminary evaluation of chip functionality and performance, as well as prototyping.