How to make a charger for 10 batteries

They asked me to make a charger. The main difference from many is the presence of 10 channels. People are going to charge a number of lead batteries. They have batteries installed in laser tag weapons. This charger can also be used to charge Li-ion.
How to make a charger for 10 batteries

For homemade we need


  • To mount the device, I chose a wiring box. The dimensions of the casing are 4*6 cm. A piece of half a meter was needed.
    How to make a charger for 10 batteries

  • Since they gave me the old connectors, I will install them in the new design.
    How to make a charger for 10 batteries

  • You will also need double-sided tape. I took the foam one.
    How to make a charger for 10 batteries

  • For the casing plugs I used soft plastic. It seems like there are factory plugs, but I haven’t found any.
    How to make a charger for 10 batteries

  • The basis of our charging is LM2596 boards from China (http://ali.pub/3ge64l). They have resistors to regulate voltage and current. There is also a resistor for setting the end of charge indication.
    How to make a charger for 10 batteries

  • You also need a connector for connecting an external power supply. At the time of assembly. Its type has not yet been determined.

Assembly of the structure


You need to connect all the boards together. I used soft wire. We combine all the pros with each other, and we also combine all the cons.Having soldered 5 boards, I checked them. They are working.
How to make a charger for 10 batteries

We connect all 10 boards parallel to each other.
How to make a charger for 10 batteries

We glue with double-sided tape. Its thickness is about 1 mm.
How to make a charger for 10 batteries

I cut these plugs out of plastic. They will be attached with super glue, nothing military here. They lean against the box and coat it with glue.
How to make a charger for 10 batteries

To ensure the reliability of the structure, I took a piece of plywood. I'll screw the box to it.
How to make a charger for 10 batteries

I made holes in the plywood on the sides to mount the device on the wall.
How to make a charger for 10 batteries

I make holes in the side of the box for the wires.
How to make a charger for 10 batteries

I feed the wires through the holes in the box, tying knots on the wires. I solder the wires to the boards according to the polarity. In the center there is a plus, the outer cylinder is a minus.
How to make a charger for 10 batteries

I installed a connector on the box. An external power source is connected through it. I connected 12.6 volts. More is possible, but this device can be connected in the car.
How to make a charger for 10 batteries

I solder the external connector.
How to make a charger for 10 batteries

I almost forgot the main thing. The batteries in vending machines are 6 volt. The boards are set to 7.3 volts, with the resistor closest to the incoming connector. The current is adjusted to 0.12 amperes. The resistor closest to the output connectors. I didn’t turn on the charge control indicator; there was no need for it. I turn it on. Everything is working.
How to make a charger for 10 batteries

This is what the finished device looks like. So far I have installed 10 boards. If necessary, you can add four more; there is space for them. Close the lid.
How to make a charger for 10 batteries

This is such a simple charger. People were pleased with the result. This device can charge any batteries. The main thing is to configure the necessary parameters.

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