Electronic cars are becoming more common on the road and in the near future the road could be dominated by them but when an electric car has run its life the battery capacity has typically fallen to around 60%. The amp hours of the cell is still in the thousands of amp which is no good for the car but extremely useful for energy storage in remote areas, energy harvesting and emergency systems. Currently the automotive industry has the batteries disposed and this could cost between £5 – 10k, an alternative solution would be to use the remaining capacity of energy storage.

You are required to design a high efficiency switch mode power supply circuit for the used car battery stacks that will convert the high voltage levels to a constant and reliable power source for commercial use. You are not required to design the battery charging circuit (Lithium ion technology is extremely hazards and the health and safety would be a nightmare). A bench power supply can be used to emulate the voltage output from the battery. Electrical Specification: Input 3.2 – 30Vdc

Outputs (1) 5v 500mA

(2) 12v 300mA (2) 36v 100mA

Mechanical Specification:  The power supply must be capable of being enclosed in a suitable enclosure for  Completeness of the engineering design.

 Suitable connectors to the battery terminals should be proposed. Suitable power supply connectors for the output of the device should be proposed

Project scope: The progression of your design from basic concept through to final iteration, including all schematics, bill of materials (component lists) and any simulation studies (complete or partial) that you have carried out complete with a critical analysis of the results from such studies and indication of how these studies further influenced your design.

Evidence of the methods you have used to ensure stability of control loops. Final hardware design including any PCB layouts and track patterns Test results from your hardware to show that specification is met. Comparison of results from hardware with results from simulations (if appropriate)

I am using LTspice for simulation and PCB design spark . referance stule IEEE