2024年11月19日 · You can also test the battery as it is being charged to make sure it is not overheating, but that requires a more sophisticated circuit. In my LM2576 charger, I limit current with a simple transistor and resistor. The resistor senses the current and the transistor fools the voltage feedback into cutting back when the current gets too high.

2024年11月26日 · But I recently soldered to some of them and THAT WAS A PAIN, so I recommend stud mounted diodes with an adequate heat sink and a small fan/blower. I have used a part of a bridge rectifier as a full-wave, NOT BRIDGE rectifier in a much smaller battery charger and it has performed well for over 20 years of fairly hard use.

2023年12月2日 · Newbie friendly on the house? I want to create a project where I can charge my Li-Po Battery (3.7v 1000mah) with a Load Sharing and detect when its low energy measuring its voltage with a current sensor INA219 in a ESP32 microcontroller. I'm using a step down of 3.3v (LM2596) to power the...

2024年11月22日 · The bulk of the charging is at a constant current, not voltage. The charger must provide whatever voltage is needed to get the desired current. For was 12V that voltage is around 14V. Why do you want 18V? What are you intending to charge with it?

2018年6月9日 · Hi! I would like to find battery charger design with li-po. Looking at the data sheet to use the LM317, the expression for the basic formula and the battery-charger circuit is confusing. I would appreciate if anyone could explain Equation 2. Typical circuit Equation 1. Battery-Charger...

2024年2月6日 · The removal of the battery means the battery voltage is no longer opposing the charger supply voltage, so there is 1.45V more voltage across the resistor which, from Ohm's law, increases its current.

2008年9月17日 · Hi there. I managed to blow up my car battery charger earlier ( fuse did its job then :rolleyes: ) ripped it apart and soon realised that the diodes had some 'slight' damage. What i'd like to know is whether they can be repaired? The …

2021年10月26日 · As charger volts increases above battery volts the charger starts to drive current through the load and the current through MP2 reverses, which is still held on by its gate being even more -ve than its drain, charging the battery. This illustrates an oft-misunderstood property of a MOSFET compared to a BJT.

2025年1月8日 · Problem: I have a 10s 36V li-ion battery pack powering my load (resistor used as example). When the charger is connected I would like the load to be cutoff as well as charge the battery.

2024年4月7日 · Using a repaired battery charger as a DC supply is quite reasonable. Certainly I would replace the selenium rectifiers with adequately rated silicon diodes, maybe adding some heat sinking.