The charger ensures that the battery is charged with a constant current and then recharged after the charging current is reduced. The circuit consists of a full-wave rectifier, a current balancer and a charging current sensor. The current stabilizer works on the principle of limiting the current of the voltage stabilizer. The charging current decreases…
While I was thinking that there is no worse, dangerous, low-quality design for 18650 Rechargeable Li-Ion batteries and chargers, I encounter much worse chargers and batteries. The batteries of the LED Headlamp are completely dead, the charger is extremely low-quality and weak, so I placed a TP4056 module in the charger so as not to…
I made a PCB drawing with the power stage of the TL494 control circuit that I shared in the article “Converting a Computer Power Supply to a Battery Charger”. The PCB size is small and light enough to fit in a toolbox with a thick strip cooler that cannot be higher than 10×10 cm, a…
The 40 watt panel with solar energy system has been used for years and has never caused any problems. A simple circuit made with LM393 integrated circuit is used for battery charging and solar charge regulator. The battery used in solar energy system is called deep cycle or leisure battery. It can handle over-discharging compared…
A simple battery charger using the LM317T three-terminal voltage regulator. The maximum output current of the LM317T integrated circuit, which is 1.2 A, is increased by the power transistor (BD912). The maximum output current of the charger is limited to approximately 5.3 A by the R4 resistor. Since there was no 0.55-OHM ready-made stone resistor,…
The purpose of the Charger is to overcome some of the limitations of the basic charger and offer users more flexibility. The advanced charger is based on similar hardware to the basic charger. The main differences are in the management of charge/discharge profiles, which can now be entered “locally” and without computer support. Differences from…
A modification to convert an old generation ATX or older AT computer power supply to a 4AH..100AH battery charger. You can add a TL494 controlled module to the power supply and make a high power charger that works very well after a few tweaks. The output voltage of the circuit can be adjusted between 10.6v….17v…
The designed SMPS charger system uses both constant current and constant voltage charging methods. It can be used to charge classic, gel and traction accumulators with a working voltage of 12 V. It can gently charge deeply discharged accumulators, but also maintain their maximum capacity during a longer shutdown. The charger is able to recognize…
BMS 3S 25A is frequently used especially for Li-ion battery conversion of cordless drills. Its prominent features are balanced charging, over-current, short-circuit protection, allowing instantaneous 34-40A current flow, which is very good for high-power applications, and the PCB size is very small and the mosfets are cooled over the PCB. (although a heatsink may be…
The advantages of lithium batteries are many, first of all, high power, low weight and no “memory effect”. Also, a lithium battery has three times the voltage of a nickel-cadmium or nickel-metal hydride battery (1.2V). However, lithium batteries cannot be used safely and efficiently without special control systems. The first version of the Li-Ion Battery…