NXP Semiconductors contributes to improving the safety and charging efficiency of electric vehicle batteries through a chipset capable of precisely monitoring battery cell status through nanosecond-level synchronization between BMS devices.

On the 6th, NXP announced the industry's first battery management chipset integrating hardware-based electrochemical impedance spectroscopy (EIS). Designed to enhance the safety and performance of electric vehicles (EVs) and energy storage systems (ESS), this solution enables nanosecond-level synchronization between all Battery Management System (BMS) devices to precisely monitor battery cell status.

This system includes three BMS units consisting of a BMA7418 cell detection device, a BMA6402 gateway, and a BMA8420 battery junction box controller. By directly integrating the Discrete Fourier Transform (DFT) into the chip, it analyzes high-frequency responses in real time and can rapidly detect early signs of battery failure.

"The EIS solution provides powerful laboratory-grade diagnostic tools for vehicles," explained Naomi Smit, Vice President and General Manager of NXP Driver and Energy Systems. "It simplifies system design by reducing the need for additional temperature sensors and enables faster and safer charging without compromising battery health."

While existing software-based battery monitoring had limitations in detecting dynamic events, NXP's hardware-embedded EIS technology enables both fast charging and extended battery life. Additionally, it enhances design flexibility by providing a pin-to-pin compatible package that allows for direct upgrades to cell modules and battery junction box control units.

This system includes an electrical excitation signal generator that pre-charges the high-voltage circuit and generates an excitation signal, and enhances energy efficiency by utilizing a DC link capacitor as an auxiliary energy storage device. This enables stable estimation of the battery state even under dynamic conditions such as charging or load shifting.

The chipset is scheduled for release in the first half of 2026 and is planned to come with supporting software that runs on NXP's S32K358 automotive MCU.