Importance of an Accurate Fuel Gauge in a Battery Management System

A battery management system consists of three ICs: the battery monitor and protector, the microcontroller (MCU), and the fuel gauge. The fuel gauge delivers the state-of-charge (SOC) within a battery management system, which is the remaining capacity left in a battery. This Tech Talk will provide a deep dive into fuel gauges, including traditional fuel gauge methods, SOC vs. analog front end (AFE) accuracy, how MPS fuel gauges improve safety and make calibration unnecessary, and more.

Sections:

• Introduction to BMS
• Traditional Fuel Gauge Methods
• State-of-Charge Estimation Methods
• Cell Balancing Deep Dive
• MPS Fuel Gauges Improve Safety
• SOC vs. Analog Front End (AFE) Accuracy
• How MPS Fuel Gauges Handle Errors
• Key Battery Parameters
• Benefits of an Accurate Cell Model
• MPS Fuel Gauges Make Calibration Unnecessary
• Enabling Mixed-Model Technology
• Built-In Soft Start & Cost Savings