MBMI7018SA1AE

Overview

The BMI7018 is an 18-channel lithium-ion battery cell controller IC designed for industrial applications such as energy storage systems (ESS) and uninterruptible power supplies (UPS). It monitors up to 18 battery cells and eight temperatures with configurable digital filtering. The device features a robust isolated 2.0 Mbit/s Transmission Protocol Link 3 (TPL3) daisy-chain interface supporting up to 62 nodes, alongside a 4 Mbit/s SPI interface. It provides onboard passive cell balancing with a peak current of 360 mA and operates within a supply voltage range of 9.0 V to 90 V, with a maximum transient of 94 V.

Feature Summary

• Supports monitoring of up to 18 battery cells and 8 temperature sensors with integrated configurable averaging for high accuracy.
• Features a robust isolated 2.0 Mbit/s two-wire twisted-pair differential daisy-chain communication interface using inductive or capacitive coupling.
• Provides onboard passive cell balancing with up to 360 mA peak current and multiple control strategies including timer, voltage, temperature, and PWM modes.
• Operates within a wide supply voltage range from 9.0 V to 90 V, accommodating transients up to 94 V.

Applications

• Energy Storage Systems (ESS)
• Uninterruptible Power Supplies (UPS)
• Industrial Battery Management Systems

Procurement Notes

Verify the specific suffix of the part number against official NXP documentation to confirm exact package type, temperature grade, and safety certification status. Ensure compatibility with the host microcontroller's SPI or TPL3 interface requirements. Confirm functional safety alignment with SafeAssure program standards if required for the target application. Check for any specific errata sheets relevant to the manufacturing lot.

Selection Notes

Select this component for applications requiring high channel count and robust isolation in industrial environments. Consider the 360 mA balancing capability and wide input voltage range when designing for large battery stacks. Evaluate the need for TPL3 daisy-chain topology versus direct SPI connection based on system architecture and node count. Ensure the design supports the required thermal management for passive balancing operations.

Part Context

The BMI7018 belongs to NXP's portfolio of battery management solutions tailored for demanding industrial and stationary storage applications. It integrates advanced measurement and balancing functions into a single chip, reducing external component count. The device is part of a family that emphasizes long-term availability and functional safety compliance, supporting complex battery architectures in critical infrastructure.

Replacement Considerations

Consult official NXP documentation for pin-to-pin compatible alternatives within the same product family. Verify electrical specifications and safety certifications match the original design requirements before substitution.

FAQ

What communication interfaces does the BMI7018 support?

The BMI7018 supports a robust isolated 2.0 Mbit/s Transmission Protocol Link 3 (TPL3) daisy-chain interface and a 4 Mbit Serial Peripheral Interface (SPI).

What is the maximum cell balancing current provided by the BMI7018?

The device provides onboard passive cell balancing with a peak current of up to 360 mA.

Can the BMI7018 operate with transients exceeding its nominal supply voltage?

Yes, the device operates within a supply voltage range of 9.0 V to 90 V and can withstand maximum transients up to 94 V.