NXP launches new 18-channel battery cell controller ICs for battery management systems

NXP Semiconductors has introduced its new BMx7318/7518 family of 18-channel Li-ion battery cell controller integrated circuits, aimed at enhancing battery management system (BMS) performance and safety in electric vehicles, industrial energy storage systems and 48 V battery applications. With an advanced architecture featuring dedicated Analog-to-Digital Converters (ADCs) per channel, the IC family offers flexible, pin-to-pin compatibility across device variants, providing a streamlined and cost-effective solution. It meets both Automotive Safety Integrity Level C (ASIL-C) and industrial Safety Integrity Level 2 (SIL-2) functional safety certifications.

The BMx7318/7518 series integrates analog front-end functions, battery junction box capabilities and gateway functionalities—including current-sensing and Serial Peripheral Interface-to-Two-Wire Peripheral Link bridging—directly onto the chip. According to NXP, this integration reduces external component usage by 50%, significantly decreasing costs for original equipment manufacturers and Tier 1 suppliers. The design delivers high electromagnetic interference immunity and robust bulk current injection resistance, supporting stable semi-centralized BMS configurations.

The new design emphasizes independent cell-sampling channels to prevent crosstalk and improve measurement accuracy. Its architecture supports parallel balancing across all channels up to 150 mA at ambient temperatures up to 125°C, with single-channel capability extending to 300 mA, greatly enhancing battery-balancing efficiency. It also features an ultra-low power mode that consumes just 5 µA, making it ideal for prolonged storage or transportation scenarios. Additionally, a dedicated hardware alarm pin is provided for rapid detection of overcurrent events.

“The BMx7318/7518 IC family represents another step forward in battery management innovation,” said Naomi Smit, Vice President and General Manager, Driver and Energy Systems at NXP Semiconductors. “By integrating advanced ADC architecture, high-current balancing, and robust EMI immunity, we enable our customers to design more efficient and scalable energy systems. This solution reduces system complexity and meets the required safety standards for both automotive and industrial applications. We are proud to support the growing demand for sustainable energy with technology that delivers performance, flexibility, and reliability.”

The BMx7318/7518 family is expected to become available in November 2025.

Source: NXP Semiconductors