How to make a 220 V Power Bank

How to make a 220 V Power Bank

This portable charger (Power Bank), unlike all manufactured models, produces not only 5 V DC, but 220 V AC, which is very advantageous and can be used in a wider range. Power is 60 W, which is quite a lot for such a small box that easily fits in your pocket.
Even a beginner without proper knowledge of electronics can assemble this power bank, since everything is built on ready-made Chinese modules.

Will need



Other: plastic for making the case, hot and second glue.
On Ali Express you can find batteries of various capacities from 600 mA*H to 9800 mA*H, at a voltage of 3.7 V. The total capacity of the power bank is made up of the sum of the capacities of all elements. That is, if all three batteries have a capacity of 3000 mA*H, then the capacity of the power bank will be 9000 mA*H.
How to make a 220 V Power Bank

The case must be selected for three elements.
How to make a 220 V Power Bank

Regarding the boost converter (inverter), I want to answer: the power of the presented specimen is 60 W.But you are unlikely to find exactly this one. There will likely be other smaller converter boards available to you. In terms of power, they predominate at either 40 W or 150 W. You can take any.
A distinctive feature of such mini inverters is that they practically do not consume energy in idle mode. They also have a very high efficiency, so the entire capacity will be used in full.
How to make a 220 V Power Bank

5V buck converter board with USB socket. It is necessary to directly charge devices from 5 V via USB.
How to make a 220 V Power Bank

Manufacturing Power Bank for 220 V


We install the elements in the holder and measure the total voltage. In the case they are connected in series and the output voltage of fully infected batteries totals approximately 12.5 V.
How to make a 220 V Power Bank

We solder a toggle switch in series with the elements, which will break the entire circuit and more than one converter will not just waste capacity after turning off.
How to make a 220 V Power Bank

We solder the wires to the 220 V converter inputs.
How to make a 220 V Power Bank

And at 5 V.
How to make a 220 V Power Bank

Solder the wires to the 220 V output.
How to make a 220 V Power Bank

Let's prepare a universal power outlet.
How to make a 220 V Power Bank

Something like this. You don’t need to go into too much detail, since the connection is not entirely clear, but it works. The 5V converter was soldered directly to the block, but was then soldered in parallel to the inverter.
How to make a 220 V Power Bank

Let's start making the device body. For these purposes, it is good to use thick PVC plastic, foam board, etc. We arrange the elements and roughly cut out a rectangle.
How to make a 220 V Power Bank

Place the case with the elements on hot glue.
How to make a 220 V Power Bank

The same goes for the inverter board.
How to make a 220 V Power Bank

This was the bottom. We cut the top to the same dimensions. We make grooves for the switch and socket.
How to make a 220 V Power Bank

In the center you can notice a hole - this is under Light-emitting diode, which is located on the inverter board and sticks out on the legs.
How to make a 220 V Power Bank

Solder the wires to the socket.
How to make a 220 V Power Bank

In the side wall we attach a 5 V step-down converter with a USB socket and an output connector, which we solder parallel to the entire 12.5 V battery.
How to make a 220 V Power Bank

This connector will be used to recharge the cookbank.
How to make a 220 V Power Bank

We assemble the body, gluing all the parts with second glue.
How to make a 220 V Power Bank

How to make a 220 V Power Bank

View of a completely finished device.
How to make a 220 V Power Bank

Power bank test


We turn the switch to the on position and measure the output voltage at the 220 V socket. It shows 203, but this is not critical in allowing for discrepancies.
How to make a 220 V Power Bank

We plug in a 60 W light bulb, testing it for maximum load capacity. The lamp is on.
How to make a 220 V Power Bank

We try to charge the mobile phone through the charger. Charging is in progress.
How to make a 220 V Power Bank

We try to work and charge the laptop battery. Everything works without problems.
How to make a 220 V Power Bank

We try to charge directly via USB.
How to make a 220 V Power Bank

Everything works as it should!

Charger


The device is charged via a 12 V adapter plugged into the connector.
How to make a 220 V Power Bank

How to make a 220 V Power Bank

This is not entirely correct, as it turns out. Batteries of this type must be charged through a special board 3S BMS boards. Thanks to the use of such a board, there will be no voltage discrepancy between elements in the same circuit.
That's all! Now you will have a 220 V socket in your pocket!
How to make a 220 V Power Bank

I would like to finally note that the 220 V output has a high frequency of about 800 Hz. Such a device cannot power asynchronous motors, transformers and other equipment that requires an exact frequency of 50 Hz. And for powering switching power supplies for laptops, TVs, chargers, it is quite acceptable.

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Comments (6)
  1. Sava
    #1 Sava Guests August 3, 2018 11:01
    1
    How long does 220 V work last?
  2. Guest Evgeniy
    #2 Guest Evgeniy Guests August 6, 2018 00:29
    14
    There are no 18650 batteries with a capacity of 9800 mAh!
    When connected in series, like the author, the capacity will not increase 3 times!
    The laptop will charge at best by a few percent. Etc.
    Don't you dare make something like this!!!
  3. Guest
    #3 Guest Guests 6 November 2018 20:19
    4
    I “liked” how you calculated the capacity (That is, if all three batteries have a capacity of 3000 mA*H, then the capacity of the power bank will be 9000 mA*H). If they are in series, as in your case, then put at least a million of them and the capacity will remain 3000 mAh. Go to school to study physics.
  4. Vyacheslav Garashchenko
    #4 Vyacheslav Garashchenko Guests June 7, 2019 10:30
    1
    Guys, the author calculated the capacity of the “entire power bank” according to the principle by which ALL power banks that are on sale are labeled :) They all indicate the total capacity reduced to the voltage of one ion bank :) And with this reduction, it doesn’t matter how you are switched on, in series or in parallel. Why do they do this? Because the buyer doesn’t care how it’s connected inside, but what’s important is “how long it will hold.” Of course, it would be more correct to indicate in “watt/hours,” but “this is how it is customary for power banks.” So there is no need to blame the author for not knowing how to correctly calculate the capacity :) He calculated “as is customary for all power banks” - the total, reduced to the voltage of one bank :)
  5. Vyacheslav Garashchenko
    #5 Vyacheslav Garashchenko Guests 7 June 2019 10:32
    1
    PS But it’s strange with the laptop. Usually a laptop, even if it’s turned on, draws so much power when charging that a 60-watt converter would immediately turn off due to overload, or “puff smoke.”
  6. Guest Sergey
    #6 Guest Sergey Guests 15 March 2021 22:20
    0
    Why are there no USB to 220 inverters (vacant niche)