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DIY Power Bank

In everyday time, people often use gadgets (smartphones, tablets, etc.), but when going somewhere on the road, we constantly need to charge our phone. This problem will be solved by Power Bank which can be manufactured in an hour and a half from the available components.

Materials and tools


Instruments:
  • Soldering iron (solder, flux).
  • Nippers.
  • Stationery knife.
  • Glue.
  • Soda.

Materials:
  • Body.
  • - 2 pcs.
  • 6.
  • .
  • USB (mother).
  • Switch.
  • LED and 100 ohm resistor.

DIY Power Bank

Power Bank Scheme


I collected this Power Bank according to such a scheme.
DIY Power Bank

DIY Power Bank


First of all, I started making batteries for the future Power Bank, I made contacts from a copper bus. Battery capacity is about 2000 mAh.
DIY Power Bank

Next, I connected the two batteries in parallel with each other using segments from the bus, but note that it is not advisable to solder the batteries, you need to do this with a powerful soldering iron and very quickly so that they do not have time to heat up.
DIY Power Bank

When connecting the batteries, the voltage on both should be the same (4.2 volts), but it is best to charge them separately, and then solder them into the battery.
DIY Power Bank

As the case, I used the old doorbell, from which I first pulled out all the electronics, and I removed unnecessary protruding elements with the help of pliers.
DIY Power Bank

Next, I installed USB in the place where the ringer switch was previously built in, using super glue and soda.
DIY Power Bank

By the same method, I installed a switch next to USB.
DIY Power Bank

I soldered the battery minus to the minus from the converter, it is advisable to take the wires of a thick section, because the currents here will be from 1 to 3 amperes, depending on what you charge.
DIY Power Bank

In the same way, I soldered the positive wire, connected the breaker to the gap.
DIY Power Bank

Next, I tuned the converter to the desired voltage, this voltage should fluctuate in 5.2 to 5.5 volts. When setting up, the batteries must be fully charged.
DIY Power Bank

Using a soldering iron, I made a hole for the charging controller.
DIY Power Bank

I glued the controller itself to super glue and soda, why soda, and because glue and soda form a strong polymer.
DIY Power Bank

I will install the batteries using double-sided tape.
DIY Power Bank

I installed the converter next to the controller, and also glued it to glue and soda.
DIY Power Bank

Then I soldered the wires to the output of the converter, and soldered them to USB to the extreme contacts, the contacts that are in the middle I closed them together, this is necessary so that the phone does not take Power Bank as a computer and does not charge with a current of 500 mAh.
DIY Power Bank

I soldered the plus wire from the controller to one contact of the switch, and the negative to the input of the converter.
DIY Power Bank

From a piece of plastic, I cut out a diffuser for the LED and installed between the switch and usb.
DIY Power Bank

DIY Power Bank

As an indication of the Power Bank, I used a green LED, which I pasted into the diffuser.
DIY Power Bank

You can’t connect the LED directly, because it instantly burns out, and I connected it through a resistor, 100 Ohm, using thin wires I connected to the minus and plus.
DIY Power Bank

It doesn’t shine badly for indication, it can be said that IDEAL.
DIY Power Bank

For reliability, I poured the contacts of the LED with thermo-glue.
DIY Power Bank

Result


Well, that’s all, Power Bank is ready for further use.
DIY Power Bank

Power Bank itself can be painted or pasted over with artificial leather, but I acted differently, using a self-adhesive camouflage tape I pasted over the case, which does not look bad at all.
DIY Power Bank

DIY Power Bank
come back
Comments (2)
  1. popvovka
    #1 popvovka Visitors February 14, 2018 08:44
    2
    And where is the protection against deep discharge? You need to install a BMS board or use a charge controller with protection. This boosting module will take all the energy from the 18650, thereby discharging lower than necessary. This controller will not want to charge the batteries.
  2. Victor
    #2 Victor Guests February 14, 2018 10:15
    0
    There is not enough capacity to charge modern gadgets.

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