Bi-Directional DC-DC Converter Design For Plug-in Hybrid Electric Vehicle (PHEV's)

Project Title

Bi-Directional DC-DC Converter Design For Plug-in Hybrid Electric Vehicle (PHEV's)

Project Area of Specialization Electrical/Electronic EngineeringProject Summary

Our project is an R&D project we have to do research first then to get optimized results andafter that, we will design hardware for it.

Global climate change and depleting fossil fuel reserves are driving society’s quest for a sustainable energy infrastructure. Automobiles powered by internal combustion engines represent a huge infrastructure investment, and about 1/3rd of the oil consumption. The transition to an all-electric automobile fleet appears to be very attractive and desirable, but has been limited by several key technology and business issues. These include lack of an appropriate energy storage technology and electricity distribution infrastructure – particularly given the need to recharge the battery on an all-electric vehicle in 30 minutes to 1 hour. Replacing the existing gasoline distribution infrastructure with the new ‘all-electric’ infrastructure represents an enormous investment with no clear return-on-investment.

PHEV (Plug-in Electric Vehicle) /EV (Electric Vehicle) DC fast charging infrastructure attracts more and more attention recently. For PHEV’s external charger is used for charging the battery pack. EV’s have different mode of charging i-e from regenerative braking and from the Engine of the car. High power isolated bi-directional DC-DC converters provide galvanic isolation, V2G (Vehicle to Grid) & G2V (Grid to Vehicle) capability and reduce the cost and footprint of the system. Maintaining high power efficiency in wide vehicle battery pack voltage range is required. Single Half Bridge based high power bidirectional DC-DC Power Electronics converters are conceptually designed for this application and better results we will design hardware for it that will help the community worldwide to charge the battery pack in less time.

Project Objectives

The Objective of the project named "DC-DC Bidirectional Converter for PHEV’S" is, therefore, to improve the charging of PHEV’S using Power Electronics converter circuits.

• G2V (Grid to Vehicle Operation for charging PHEV’s /EV’s)

• V2G (Vehicles to Grid operation which include providing power to the Grid during peak hours.)

• Fast Charging ( Normal chargers available in the market takes long time to charge the Battery bank of the PHEV’s/EV’s which is one of the disadvantage of that people hesitate to buy PHEV’s/EV’s)

Project Implementation Method

We have chosen the BMW i3 to be our input datasheet and designed a Dc-Dc converter in Research phase.

For Implementation we will use

• MATLAB software for Analysis of different topologies of Power Electronics circuit present in literature and choosing the best efficient among them.
• Printed Circuit Boards for Power Electronics chargers
• Battery Pack
• Different meters
• Control Circuitry
• Temperature Sensors

Benefits of the Project

The Benefits of Projects will help the community is a number of ways.

• Dual Operation of the Charger

i-e

• G2V (Charging of PHEV’s/EV’s)

• V2G (Vehicles to Grid operation which include providing power to the Grid during peak hours.)

• Fast Charging ( The battery Pack of PHEV’s/EV’s will take less time to charge)

If fast charging is available people will switch to PHEV’s/EV’s which will have two most important effects on Economy & Environment.

• Less Petroleum Use:

Plug-in hybrids use roughly 30% to 80% less petroleum than conventional vehicles. Since electricity is produced mostly from domestic resources, plug-in hybrids reduce oil dependence.

• Less Greenhouse Gas Emissions:

 Plug-in hybrids typically emit less greenhouse gas nearly zero than conventional vehicles. However, the amount generated depends partly on how the electricity is produced.

• No Noise Pollution:

Plug-in Hybrid Vehicles are super quite. They don’t make any noise while starting or during driving like any conventional Vehicles.

Technical Details of Final Deliverable

We have a Voltage source at the input side of the Bidirectional converter power electronics circuit which is connected to the battery pack of PHEV’s.

•   G2V (Grid to Vehicle)

Buck mode of Half Bridge DC-DC Power Electronics Converter will be activate which will step down the Voltage using high power rating MOSFETS from 700V of High Voltage Dc bus to the charge the batteries.

•  V2G (Vehicle to Grid)

Boost mode of the Half Bridge Dc-Dc Power Electronics converter will be activated when the Power will be in excess which will be utilized by stepping up the voltage of the Battery pack to the High Voltage Dc Bus which is 700V during peak hours.

• Fast Charging

The chargers available in the market are way too much slow in charging the PHEV’s battery pack and are too heavy. These readymade chargers in the market take whole night to charge battery pack of PHEV’s/EV’s.

 The design of our charger will be small as compared to other and the    efficiency will be much higher and will charge batteries pack of PHEV’s/EV’s. Our charger will be able to Charge  a battery pack of 52 KW in approximately in 35 minutes.

Final Deliverable of the Project Hardware SystemCore Industry Energy Other Industries Transportation Core Technology OthersOther Technologies OthersSustainable Development Goals Affordable and Clean Energy, Industry, Innovation and InfrastructureRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	79244
PCB Designing, Fabrication & assembling for Power Electronics Circuits	Equipment	4	4000	16000
Battery 12V, 6.5AH (Li ion)	Equipment	12	4312	51744
Clamp Meter	Equipment	1	1500	1500
Shipment of Equipments from US	Miscellaneous	10000	1	10000