By: Lasse Jaspersen In this 2-part series on how to build a battery charger for a solar tracker (instructions to follow), you will learn how to: Build a 12V lead-acid battery charger Use an Arduino Nano to control the charging circuit Use perfboard for plated-through-hole (PTH) soldering of a circuit. Mount a circuit on “something”, just. Dec 05, 2015 Hi, first post here. I'm developing on an Arduino-based NiMH (for AA or AAA) battery charger, I'm calling it Quite Smart Charger (or QSC). Eventually the project would allow to easily build a DIY smart battery charger that is fast but does not wear the battery through overcharging.
1. Explanation
The most Arduino-based projects are powered by external power supplies or battery-packs. The use of like power products might end up being sometimes unlikely (i.y. remote control microcontroller system placed in a less accessible region). In like cases, a solar power offer backed-up by a rechargeable battery could end up being more suitable. The purpose of this tutorial is certainly to show how to develop like a energy offer.
Trouble level: newbie.
2. Components
- 1 back button Solar Cell Module (6V, 1W);
- 1 a Li-ion Battery Charger Module (TP4056 5V Mini USB 1A);
- 1 times Boost Step-up Strength Supply Component (DC 0.9V-5V to DC 5V);
- 1 back button Li-ion Battery power (18650, 3.7V, 2,250mAh);
- cables.
- 1 a Li-ion Battery Charger Module (TP4056 5V Mini USB 1A);
- 1 times Boost Step-up Strength Supply Component (DC 0.9V-5V to DC 5V);
- 1 back button Li-ion Battery power (18650, 3.7V, 2,250mAh);
- cables.
3. Li-ion Electric battery Charging Cycle
Lithium centered batteries are one of the nearly all popular sorts of rechargeable batteries expected to the high energy denseness, tiny memory space impact and reduced self-discharge. The drawback is that they cannot be charged making use of a normal power source; their charging cycle involves two stages:
-constant-current stage: the battery is definitely charged using a current-limited energy offer. The suggested charging rate is usually 0.5C - 0.7C (G is the battery strength capability). The finish of this phase is achieved when the maximum voltage is certainly arrived at; at this point the battery charge is definitely about 70-80%;
-constant-current stage: the battery is definitely charged using a current-limited energy offer. The suggested charging rate is usually 0.5C - 0.7C (G is the battery strength capability). The finish of this phase is achieved when the maximum voltage is certainly arrived at; at this point the battery charge is definitely about 70-80%;
![Arduino battery charge indicator Arduino battery charge indicator](/uploads/1/2/5/7/125718604/482560761.jpg)
Ex.The battery used in this guide has a minimal voltage of 3.7V, optimum voltage of 4.2V and a power capacity of 2250mAh (C = 2250mAh). The constant-current stage should end up being accomplished at a charging rate between 0.5C = 1125mAh and 0.7C = 1575mAh; in our situation the getting current will become limited at 1000mA that corresponds to a charging rate of 0.44C.
-constant-voltage/saturation phase: When the battery gets to its maximum voltage, the charger works as a voltage limited power offer; the battery voltage remains at maximum while the getting current drops gradually. When the cost current will be below 10% of the nominal capability, the battery will be considered fully charged.
Li-ión battery getting routine (charge rate: 1C). The constant-current and constant-voltage charging user profile depend on the cost present, battery optimum voltage and power capability.
Information.
- Li-ion battéries perform not need to end up being fully charged as it's the case with other forms of rechargeable batteries. In fact it can be better not really to fully charge, because high voltages stresses the battery. Choosing a lower voltage tolerance or getting rid of the vividness phase prolongs battery lifetime but decreases the runtime;
- attempting to cost Li-ion batteries differently than regarding to their getting cycle specs might result in overheating, explosions and critical accidental injuries.
- Li-ion battéries perform not need to end up being fully charged as it's the case with other forms of rechargeable batteries. In fact it can be better not really to fully charge, because high voltages stresses the battery. Choosing a lower voltage tolerance or getting rid of the vividness phase prolongs battery lifetime but decreases the runtime;
- attempting to cost Li-ion batteries differently than regarding to their getting cycle specs might result in overheating, explosions and critical accidental injuries.
4. Li-ion Battery Charger Schematics
(click to expand)
5. Set up
(click on to enlarge)