Electronics > Projects, Designs, and Technical Stuff
CCCV lead-acid battery charger
Siddhat:
--- Quote from: bin_liu on June 24, 2020, 03:47:44 am ---3 stages charging is a common practice.
Before, my job was to develop chargers, i hope this would help you.
--- End quote ---
Yes, 3 stages charging is a common practice. It is great to learn from people who actually worked on developing chargers. That really helped me.
bin_liu:
If you want to make an MPPT controller, this microchip document may help.
“Practical Guide to Implementing Solar Panel MPPT Algorithms”
http://ww1.microchip.com/downloads/en/Appnotes/00001521A.pdf
trobbins:
The charging requirements for a lead acid battery always relate to what the manufacturer of the battery states - so you need to identify the manufacturer and the model of the battery you have.
The manufacturer may provide recommended charging regimes for different use applications, and some batteries are designed specifically for PV system use, but even then the charging regime that is most appropriate may not align with the particular PV use profile that the manufacturer has designed and tested the battery against.
You may well be just using a low cost generic VRLA monobloc sold for the broad UPS market, where the battery is designed to sit at float voltage 24/7/365, and very infrequently get forced in to a high rate discharge followed by a current limited return to float level. That type of battery was not specifically designed for typical PV type charge and load profiles (where the load profile can encompass a wide range of uses).
So I suggest you start by linking to the manufacturers recommended operating instructions for the battery model you have, even if there is no comment specifically on PV applications. Failing even a basic note from the manufacturer, the battery may have some basic charging notes printed on the casing, or the battery may have had a sales brochure.
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