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Bidirectional Buck-Boost DC-DC Converter for Battery Charge and Discharge

Approx. component budget: Rs. 5,000 - 9,000

Objective

Build and test a converter that can both charge and discharge a battery through the same hardware.

What you will build

A converter that moves power in both directions between a 12 V battery and a 24 V bus under microcontroller control, with current and voltage measurement.

Results you can expect

• Efficiency vs power in both directions
• Ripple
• Mode-change behaviour
• And closed-loop response to a load step

What you will learn

Synchronous converters, bidirectional power flow and battery interfaces.

Tools and notes

MOSFET half-bridge, gate drivers, inductor, STM32/Arduino, INA219, scope. Use current limit and a fuse on both ports.

Resume points from this project

• Built and tested Bidirectional Buck-Boost DC-DC Converter for Battery Charge and Discharge; objective: build and test a converter that can both charge and discharge a battery through the same hardware.
• Measured and analysed efficiency vs power in both directions and ripple; wrote the report and presented the results in a viva. Add your own numbers: [x].

Replace [x] with your own measured results. Write only what you really did.

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