This paper presents an IoT-based battery monitoring system for electric vehicles (EVs). The system is designed to monitor battery voltage, temperature, and detect fire. It also protects the battery from overcharging and overheating, ensuring safe operation. The system includes functions such as current and voltage measurement, fire protection, battery status detection, and liquid crystal display (LCD). The system uses an Arduino microcontroller, temperature sensors, voltage sensors, a cooling fan, an LCD display, a buzzer, and a DHT11 temperature and humidity sensor. The system also incorporates a GSM module for communication. The system is designed to prevent battery fires by monitoring battery temperature and shutting off power if the temperature exceeds a certain threshold. The system also includes a cooling fan to prevent overheating. The system is designed to be used with a robot that can be operated via an Android app. The system is an essential part of any EV, as it ensures the safe and efficient operation of the battery. The system is designed to monitor the battery's state of charge, temperature, and overall health. The system is also designed to prevent overcharging and overdischarging of the battery, which can cause permanent damage. The system is designed to be used in EVs that use 2-cell lithium-ion (Li-ion) batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if theThis paper presents an IoT-based battery monitoring system for electric vehicles (EVs). The system is designed to monitor battery voltage, temperature, and detect fire. It also protects the battery from overcharging and overheating, ensuring safe operation. The system includes functions such as current and voltage measurement, fire protection, battery status detection, and liquid crystal display (LCD). The system uses an Arduino microcontroller, temperature sensors, voltage sensors, a cooling fan, an LCD display, a buzzer, and a DHT11 temperature and humidity sensor. The system also incorporates a GSM module for communication. The system is designed to prevent battery fires by monitoring battery temperature and shutting off power if the temperature exceeds a certain threshold. The system also includes a cooling fan to prevent overheating. The system is designed to be used with a robot that can be operated via an Android app. The system is an essential part of any EV, as it ensures the safe and efficient operation of the battery. The system is designed to monitor the battery's state of charge, temperature, and overall health. The system is also designed to prevent overcharging and overdischarging of the battery, which can cause permanent damage. The system is designed to be used in EVs that use 2-cell lithium-ion (Li-ion) batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the temperature exceeds a certain threshold. The system is designed to be used in EVs that use 2-cell Li-ion batteries. The system is designed to monitor the battery's voltage and temperature, and to shut off power if the