The use of green energy is becoming increasingly more important in today’s world. Therefore, electric vehicles are currently the best choice for the environment in terms of public and personal transportation. Because of its high energy and current density, lithium-ion batteries are widely used in electric vehicles. Unfortunately, lithium-ion batteries can be dangerous if they are not operated within their Safety Operation Area (SOA). Therefore, a battery management system (BMS) must be used in every lithium-ion battery, especially for those used in electric vehicles. In this work, the purpose, functions and topologies of BMS are discussed in detail. In addition, early battery models along with the hardware and system designs for BMS are covered in a literature review. Then, an improved battery model is introduced, and simulation results are shown to verify the model’s performance. Finally, the design of a novel BMS hardware system and its experimental results are discussed. The possible improvements for the battery models and BMS hardware are given in the section on conclusions and future work. A battery management system (BMS) is proposed which is used for electronic vehicle that manages a rechargeable battery (cell or battery pack), such as by protecting the battery from operating outside its safe operating area, monitoring its state of charging and state of health using IOT. The main controlling device of the project is PIC Microcontroller which loaded program written in embedded C language The MICROCONTROLLER measures the SOC (State-of-Charge) and (SoH) State-of-Health from voltage sensors and based on that it will switch on the relays for battery charging. Here relay works as a switch to on/off the charging connection. And also, it will send the voltage, temperature, SOC and SOH values into the thingspeak cloud through esp8266 Wi-Fi module. The status of the project will display on LCD module.  

The major building blocks of this project are:

• Regulated power supply.
• PIC Microcontroller.
• Temperature sensor.
• Voltage sensor.
• Buzzer.
• Three battery packs.
• Three Relays.
• Charging Circuit.
• LCD display.
• LED Indicators.
• Crystal oscillator.
• Reset button.
• ESP8266 Wi-Fi module.
• Load(LEDs).

  Software’s used:

• PIC-C compiler for Embedded C programming.
• PIC kit 2 programmer for dumping code into Micro controller.
• Express SCH for Circuit design.

  TECHNOLOGY USED:

• Thingspeak technology.

  Block Diagram: Video