The basis for the electronic-schematic was found on Lewis Loflins website.Ī big “Thank You” to Lewis! Please visit his website to learn in-depth how the circuitry works. Since I’m far from a qualified electrical engineer, I had to search for schematics. The donor for my project was an old 6-12V “dump-charger”. The charger needed to be able to perform all the three charge-stages required for a Lead-Acid battery Absorption-charge, Equalization-charge and Float-charge (Check at the bottom of this post for some highly recommended reading about Lead-Acid-Battery charging) In the winter, to keep the batteries “topped-up”, I needed a “powerful” sophisticated charger which can do one battery individually, or two batteries in series. In the summertime, they get charged via a Victron MultiPlus inverter / charge-controller. My solar panel system has a 24V battery-bank, consisting of 4x 6V 225Ah Trojan open Lead Acid deep-cycle batteries. Requirements for the Charger and Basic Design
#SMART TIMER CHARGER BATTERY CHARGER CODE#
Roland was also very kind to walk through the design process, provide the code he used and supply some great pictures – please enjoy!
This battery charger can charge 6-12 Volt Lead Acid batteries and has an LCD for display relevant charge data. He has brought a ton of talent, time and dedication to make this happen. I am always impressed by the projects I see submitted, and this one is truly stellar. If you are willing to pay the higher price tag associated with them, you can rest assured of your battery and gadget performance.This project was built by one of our long time students, Roland.
Intelligent chargers are also called Smart Chargers or Negative Delta Voltage Chargers. Cycle life is the number of times that a rechargeable battery can charge/discharge. If you are using an intelligent charger, you will never overcharge your battery, thus extending its cycle life. Using battery temperature or voltage as the parameter, intelligent chargers get to know when the battery is 80% charged, so that they can switch to trickle charge to maintain the charged status of the battery. Keeping up with their names, intelligent chargers can detect when your battery is fully charged.
Or, if your battery is only partially discharged, the charger has no way of knowing that and will end up overcharging it. So, if you have a higher power battery and you are trying to charge it with this charger, the battery may not be completely charged because it switched to trickle charge before the 80% threshold. The main problem with these timers is that they are pre-programmed with time duration for high charging and switching to a trickle charge. Then, they switch to a trickle charge to maintain the battery charge. These chargers provide high charge initially, till the battery is 80% charged. The timer controlled chargers were first devised in the late 1990s to charge high capacity Ni-Cd cells. This can at times affect your gadgets too, because many batteries charge while they are inside the gadget (a laptop, for example). This can be harmful for your batteries because overcharging can damage them. A standard battery charger, whether it is slow or fast, keeps supplying current to the battery while it is plugged in.
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