DIY Power Bank

DIY Power Bank

In everyday life, people often use gadgets (smartphones, tablets, etc.), but when we go somewhere, we constantly need to charge our phone. This problem will be solved by a Power Bank that can be made in an hour and a half from available components.

Materials and tools


Tools:
  • Soldering iron (solder, flux).
  • Wire cutters.
  • Stationery knife.
  • Glue.
  • Soda.

Materials:

DIY Power Bank

Power Bank Scheme


I assembled this Power Bank according to this scheme.
DIY Power Bank

Making a Power Bank with your own hands


The first thing I did was make a battery for the future Power Bank; I made contacts from a copper busbar. Battery capacity is about 2000 mAh.
DIY Power Bank

Next, I connected two batteries in parallel to each other using sections from the busbar, but keep in mind that it is not advisable to solder the batteries, this must be done with a powerful soldering iron and very quickly so that they do not have time to heat up.
DIY Power Bank

When connecting 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 a battery.
DIY Power Bank

As a case, I used an old doorbell, from which I had previously removed all the electronics, and I removed unnecessary protruding elements using wire cutters.
DIY Power Bank

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

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

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

In the same way, I soldered the positive wire and connected the switch into the gap.
DIY Power Bank

Next, I set the converter to the desired voltage, this voltage should fluctuate between 5.2 and 5.5 volts. The batteries must be fully charged when setting up.
DIY Power Bank

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

I glued the controller itself with super glue and soda, why soda, because glue and soda form a durable 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 with glue and soda.
DIY Power Bank

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

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

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

DIY Power Bank

I used green to indicate the operation of the Power Bank. Light-emitting diode, which I glued into the diffuser.
DIY Power Bank

Connect Light-emitting diode You can’t do it directly, because it will burn out instantly, but I connected it through a 100 ohm resistor, using thin wires, connecting it to minus and plus.
DIY Power Bank

For indication, the light is not bad, we can say that it is IDEAL.
DIY Power Bank

For reliability, contacts LED I filled it with hot glue.
DIY Power Bank

Result


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

The Power Bank itself can be painted or covered with artificial leather, but I did it differently; I covered the body with self-adhesive camouflage tape, which doesn’t look bad at all.
DIY Power Bank

DIY Power Bank
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Comments (3)
  1. popvovka
    #1 popvovka Guests 14 February 2018 08:44
    3
    Where is the deep discharge protection? You need to install a BMS board or use a charge controller with protection. This boosting module will take all the energy from 18650, thereby discharging it lower than necessary. This controller will not want to charge batteries.
  2. Victor
    #2 Victor Guests 14 February 2018 10:15
    1
    There is not enough capacity to charge modern gadgets.
  3. AndrejMU
    #3 AndrejMU Guests 18 September 2019 23:07
    1
    The horror of the current.