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CCCV lead-acid battery charger

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boB:

Yeah, you will need to tell us what the amp-hour rating and nominal voltage of this battery is to say how large the supply needs to be.

And, is it a flooded,  AGM, gell, or sealed lead-acid battery etc. ?

You will usually want to voltage regulate for the absorb stage after bulk charging (current limit)  is done.

bin_liu:
3 stages charging is a common practice.
Before, my job was to develop chargers, i hope this would help you.

Siddhat:

--- Quote from: bin_liu on June 24, 2020, 12:35:51 am ---look here,It‘s a PDF file.

--- End quote ---
Thank you..trying to understand the circuit!!

Siddhat:

--- Quote from: trobbins on June 24, 2020, 01:12:38 am ---Siddhat, I suggest you do more background reading on lead acid battery charging to appreciate better what is happening in the battery and how a typical charger works.  You also need to elaborate on your project, as there is no detailed information except that it is a lead acid battery.  I suggest you also get your algorithm reviewed, and perhaps even set up a simple manual charger and follow your algorithm through by manual changes.  Nobody knows what you are aiming to really do, and batteries can be hazardous when ill-treated.

--- End quote ---
Okay..I am trying to charge a 12V 7.8Ah C20 rating lead-acid battery using a buck boost converter from a solar panel that implements a MPPT algorithm. Since, I've already designed and simulated the MPPT algorithm, I now need to charge the lead-acid battery using a CCCV algorithm to ensure safe charging procedure. Yes, reading the theory on how a lead-acid battery and how a charger works is actually good to appreciate and understand what's happening acutually.

Siddhat:

--- Quote from: boB on June 24, 2020, 01:34:14 am ---
Yeah, you will need to tell us what the amp-hour rating and nominal voltage of this battery is to say how large the supply needs to be.

And, is it a flooded,  AGM, gell, or sealed lead-acid battery etc. ?

You will usually want to voltage regulate for the absorb stage after bulk charging (current limit)  is done.

--- End quote ---
7.8Ah, 12V sealed lead-acid battery. Yes, maintaining the voltage after the bulk stage is important to repay for the losses due to self discharge of the battery. But, what is the regulating voltage value that battery needs after the bulk charging stage?

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