Battery Management System (BMS)
Maximizing range, ensuring safety, and extending battery life with Nuvoton's precision automotive-grade ICs. Our solutions provide ASIL-D compliant monitoring for modern EV architectures.
Why Nuvoton BMS?
As electric vehicles (EVs) become mainstream, the Battery Management System (BMS) acts as the brain of the battery pack. Nuvoton provides high-precision battery monitoring ICs (BM-IC) that measure voltage, temperature, and current with exceptional accuracy.
- High Measurement Accuracy: Less than +/- 1.5mV error for precise state-of-charge estimation.
- Functional Safety: Designed for ISO 26262 ASIL-D compliance to ensure maximum reliability.
- Daisy Chain Communication: Robust proprietary interface resisting EMI noise in high-voltage environments.
System Block Diagram
IC Details
Click on any blue block in the diagram
to view relevant IC solutions.
Category Name
Featured Products AEC-Q100
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 BMIC chip set
Nuvoton’s battery monitoring chipset consist of a Battery monitoring IC, Pack monitoring IC and a Communication IC.
Introduction material for Nuvoton BMIC chip set
Nuvoton’s semiconductor solutions that support EV platform development.
Flyer for advanced BMIC technology with EIS measurement
Estimation of battery internal temperature and SOH (State of Health) with our algorithm
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-KA84950UA
The KE-KA84950UA is a board capable of measuring the voltage of up to 25 cells. Depending on the number of cells, battery monitoring ICs (KA84950UA) can be daisy chained. It can also be combined with the IC for 20 cell measurement (KA84930UA).
KE-KA84917UA
KE-KA84917UA is a battery current measurement board, allowing selection between single-stage or two-stage connection depending on system configuration.
KE-KA84922UA
KE-KA84922UA is the board responsible for BMS system control. It is equipped with a communication IC (KA84922UA) and Nuvoton’s microcontroller (KM1M7AF52N).