Common fault phenomena and solutions of electric vehicle battery current sensors

Imagine: at a critical moment, your electric vehicle battery management system (BMS) suddenly issues an “abnormal current” alarm, while you lose power without warning. The battery current sensor is like the “current eye” of a car. Once there is a problem, it not only affects the range but may also pose safety hazards. Only by understanding its “temperament” and “deviation” can we extinguish the fire of malfunction in the first time and ensure worry free driving. 1、 Introduction to Electric Vehicle Battery Current SensorThe current sensor is responsible for real-time monitoring of the charging and discharging current of the battery pack, and is the core component of BMS for accurately estimating the remaining charge (SOC) and state of health (SOH). Common types include Hall sensors and shunt sensors, each with its own advantages and disadvantages – Hall sensors have strong anti-interference ability but slightly lower accuracy, while shunt sensors have high accuracy but require good heat dissipation.2、 Common fault problems and solutionsCorresponding measures for fault phenomenaSignal drift, jitter • Check and stabilize power supply and grounding