E-Bike/ E-Scooter

Nuvoton’s e-bike/e-scooter solution maximizes continuous operating time through ultra-low power consumption in sleep mode and ensures long-lasting performance with high-precision cell voltage measurement.
By delivering a simple yet safe BMS architecture, it is the ideal choice for light electric vehicle applications.

View our E-Bike/ E-Scooter Solutions

BMS for Light Electric Vehicle

Nuvoton's 17-cell compatible BMIC is used in a variety of electrification applications, from passenger mobility to unmanned mobility such as AGVs and drones.
It also has built-in regulators required for peripheral circuits, making it easy to build cell balance switches and charge/discharge controls.

High-precision sensing: Cell voltage measurement accuracy of ±2.9 mV, along with precise current and temperature monitoring to support accurate SoC/SoH estimation.
Low power consumption: Typical operating current of 260 µA and shutdown current below 0.1 µA, ensuring reliability even during long-term storage.
Safety-oriented design: Built-in self-diagnostics, fail-safe functions, and support for charge/discharge switch control (both low-side and high-side).

System Block Diagram

IC Details

Click on any blue block in the diagram
to view relevant IC solutions.

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Part No.	Product Brief	Description	Operating Voltage	Operating Temp.	Channels	Voltage/Current Accuracy	Monitoring Function	High-Side FET Control	Daisy Chain Connection	Package
KA49701A Battery Monitoring IC	PDF	Non-Stackable	12.5V ~ 85V	-40°C ~ 105°C	17	±2.9 mV	Volt/CurrTemp	N/A	N/A	QFP-48
KA49702A Battery Monitoring IC	PDF	Non-Stackable	12.5V ~ 85V	-40°C ~ 105°C	17	±2.9 mV	Volt/CurrTemp	Available	N/A	QFP-48

Design Resources

We provide product datasheets, functional safety manuals, and evaluation board to support your BMS design. Please contact us first.

Technical Documentation

Flyer for Nuvoton Industrial BMIC

Nuvoton’s battery monitoring ICs are 1-chip battery monitoring ICs for Li-ion battery cells, which have built-in high-resolution ADCs and can measure the voltage and current levels of battery cells with high accuracy.

Reference Boards for BMS

The evaluation board includes cables and the software required for microcontroller control, enabling performance verification and initial evaluation of Nuvoton’s battery monitoring IC chipsets. It can serve as a reference for customers developing battery management systems.

KE-KA49701A

KE-KA49701A is an evaluation board equipped with the KA49701A, capable of evaluating the voltage measurement of 4 to 17 battery cells, charging and discharging, cell balancing, fault detection, and more. The accompanying PC GUI software links with the MCU software to provide a high-level graphical user interface.

setup manual

KE-KA49702A

KE-KA49702A is an evaluation board equipped with the KA49702A, capable of evaluating the voltage measurement of up to 17 battery cells, charging and discharging, cell balancing, fault detection, and more. The accompanying PC GUI software links with the MCU software to provide a high-level graphical user interface.