The goal of the project is the design of a hardware to support the measurements of Intelligent Battery Sensors, the product of Continental Automotive Hungary Corporation. The task is to design a printed circuit board, which ensures the connection between the device, and the multifunction data acquisition board.
The Intelligent Battery Sensor (IBS) was developed for monitoring batteries of vehicles. It calculates the State of Charge (SoC), State of Health (SoH) and State of Function (SoF) parameters by measuring the voltage between the two clamps, the current, and the temperature of the battery. The results are then transmitted to the Engine Control Unit (ECU) via LIN communication network, which then adapts the recharge-discharge cycles, loads of comfort consumers, and the Start-stop system to the actual state of the battery.
The product is connected to the negative clamp, the chassis is used as a ground, and its 12V power supply is provided by the battery. One of my tasks is to provide a controllable power supply between 9 and 28 volts.
The current measurement is performed by a shunt resistor, but in case of tests, only simulations are used. A part of my task is to provide a voltage level to the data acquisition board controlled either manually, or from software.
During tests, the current consumption of the product is also relevant information, therefore a shunt resistor should be implemented to the system. The setup must remain mobile and usable without any external device, therefore its power supply should be designed to operate from a power outlet. Another important factor of the device is that the PCB should remain usable further on, in case of development and change of the IBS, hence many ports will be implemented, so additional functions can be easily applied in the future.