PIC16F785 Microcontroller Solar Battery Charge Controller Circuit Design Guide

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#1 21669999 07 Oct 2013 05:09

Xombi Nash Xombi Nash

Anonymous

Post #1
21669999 07 Oct 2013 05:09

I want to design Microcontroller based Solar battery charge controller, in which i want to use
PIC16F785 MCU. Can anyone have suggestion for circuit design, how to start and what will be its circuit so it can properly.

I want to interface two LED for Indication of battery charging and discharge status.
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#2 21670000 09 Oct 2013 00:33

Syed Shadab Syed Shadab

Anonymous

Post #2
21670000 09 Oct 2013 00:33

You dont need a Microcontroller to make a solar battery charger, a simple 555-timer will do the job. I had designed a solar battery charger to charge a battery of 12 volts 7.5Ah. I am Posting the design which is in Proteus. There are two potentiometers to set the battery threshold voltage (i.e. Minimum voltage battery can discharge to & maximum voltage battery can charge upto).
Hope this will solve your problem!
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#3 21670001 19 Dec 2013 00:47

Suchithra ravikumar Suchithra ravikumar

Anonymous

Post #3
21670001 19 Dec 2013 00:47

I have designed the same using PIC MCU. I used buck boost technique for charging the battery. I will suggest u the circuit diagram. hope it will be useful for u.
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#4 21670002 19 Dec 2013 05:33

Xombi Nash Xombi Nash

Anonymous

Post #4
21670002 19 Dec 2013 05:33

Thanks for reply, but i have made it using 555 timer, but it is not efficient and having some drawbacks and limitations. I hope you are aware of it.
#5 21670003 19 Dec 2013 05:36

Xombi Nash Xombi Nash

Anonymous

Post #5
21670003 19 Dec 2013 05:36

hii,

Thanks for kind reply.
Yes i need your help. my Email: -shkm.ieee(_at_)gmail.com
I want to implement MPPT algorithm, i got a some info from interent but it has limitations in regard of solar panel wattage supports.
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#6 21670004 20 Dec 2013 13:06

DAVID CUTHBERT DAVID CUTHBERT

Anonymous

Post #6
21670004 20 Dec 2013 13:06

Maximum solar panel output is obtained using MPPT (Maximum Power Point Tracking) control The PIC would be useful for implementing this.
#7 21670005 21 Dec 2013 00:40

Suchithra ravikumar Suchithra ravikumar

Anonymous

Post #7
21670005 21 Dec 2013 00:40

HII,

I have send u Email regarding solar charger using MPPT algorithm check it.
#8 21670006 22 Dec 2013 22:52

Otto Sponring Otto Sponring

Anonymous

Post #8
21670006 22 Dec 2013 22:52

Nash,
This is a very open question if you just need a charger you would not need a micro and then the question is what battery type you want to support and power/voltage etc. Consider LiFePo4 battery for longer live. I can send you a charger circuit for 2 and 4 cell LFP battery.
The charging is better to be autonomous not involving a micro but again all depends what you are after.
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Topic summary

The discussion focuses on designing a solar battery charge controller using the PIC16F785 microcontroller. While a simple 555 timer-based charger circuit with adjustable voltage thresholds is suggested for basic applications, it is noted that such designs have efficiency limitations. The PIC16F785 MCU enables implementation of advanced features like Maximum Power Point Tracking (MPPT) using buck-boost converter techniques to optimize solar panel output and battery charging efficiency. The choice of battery chemistry, such as LiFePO4 for longer life, and the number of cells (2 or 4) influences the charger design. Indicators for battery charging and discharging status can be implemented using LEDs interfaced with the microcontroller. Autonomous charging circuits without microcontrollers are possible but lack the flexibility and optimization provided by MCU-based designs.
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PIC16F785 Microcontroller Solar Battery Charge Controller Circuit Design Guide

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