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Programmable Electronic Load (CC / CV / CP Modes) for Battery and Supply Testing

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

Objective

Build a bench load and use it to test power supplies, batteries and solar panels in constant current, constant voltage and constant power modes.

What you will build

A MOSFET-based active load on a heat sink with a fan, a shunt and a voltage divider, an op-amp or microcontroller loop for constant current, voltage and power modes, and a display.

Results you can expect

• Load regulation accuracy in each mode
• Discharge curve of a battery
• Supply output regulation vs load
• Heat sink temperature at maximum power

What you will learn

Test equipment design, analog feedback and thermal management, the core of any power test lab.

Tools and notes

Arduino/STM32, MOSFETs, shunt, heat sink and fan, DAC, Excel. Limit power to what the heat sink can handle, and do not touch the sink while testing.

Resume points from this project

• Built and tested Programmable Electronic Load (CC / CV / CP Modes) for Battery and Supply Testing; objective: build a bench load and use it to test power supplies, batteries and solar panels in constant current, constant voltage and constant power modes.
• Measured and analysed load regulation accuracy in each mode and discharge curve of a battery; 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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