DESIGN AND FABRICATION OF POWER BANK

DESIGN AND FABRICATION OF POWER BANK

DESIGN AND FABRICATION OF POWER BANK

CHAPTER ONE

INTRODUCTION

1.1    BACKGROUND OF STUDY

Power banks are portable devices comprised of a special circuit that control power flow. They allow the storage of electrical energy (i.e. deposit it into the battery bank) and then later use it to charge any mobile device (i.e. withdrawn it from the battery bank).

The circuit chargers that typically come with cell phones and other portable devices charge the battery for a brief period of time. Then, they stop, check the voltage, and verify the temperature against an internal table before deciding to stop or continue the charging process. The charging regulation required by the battery is performed within the device getting charged, and this design takes advantage of that circuit.

Cell-phone batteries often die at very inconvenient times, with no ac power outlet nearby. This device uses standard AA batteries, which can be bought almost anywhere, to recharge cell phones and other portable devices like music players, e-book readers, and cameras.

Power bank are portable device comprised of a special circuit that control power flow. They allow the storage of electrical energy (i.e. deposit it into the battery bank) and then later use it to charge any mobile device (i.e. withdrawn it from the battery bank).

Power bank is also called “plug in battery, external battery and charging battery” of the digital products. Its definition is convenient and easy to carry large-capacity portable power. Power bank can simple be define as a power storage/energy reservoir for a secondary cell or a rechargeable battery. It is a third party charger that offers power to your mobile phone when the need arises.

Power banks have become increasingly popular as the battery life of phones, tablets and portable media player is outstripped by the amount of time we spend using them each day. By keeping a battery backup close by, you top up your device(s) while far from a wall outlet. Power banks are good for almost any USB-charged devices. Cameras, MP3 player, mobile phones, tablets etc. as long the power bank is charged. Most commonly power bank will have a dedicated input sockets for receiving power. This power can come from a USB sockets on your computer, but may charge faster when using a wall socket adapter. In most rare occasions , power bank can  use the same socket for input and output, but this is rare and should not be assumed of any power bank, as trying to force power into an output can damage the battery.

With the rapid development of global economy, people continued to carry more portable electronic products, as mentioned earlier, which are drained or discharged as a result of long time uses.

Therefore power bank provides the means of recharging then without the needs of waiting for electric power supply be restored. Power bank are of different size and capacities e.g. 200mAh, 3300mAh, 4600mAh etc. James,(2017).

1.2    SIGNIFICANCE OF THE STUDY

Power bank serve as an ‘extra battery’ or external charger for your phone or other electronic devices. Power bank helps to ensure longer hours of texting, phone calls, or web browsing using your mobile phone.

 

 

1.3    AIMS AND OBJECTIVE

This design (Power bank) is an electronic device aimed at achieving the following;

  • To construct a power bank that will be able to charge all types of mobile phone devices.
  • A device with short circuit protection.
  • A power bank that as over- charging protection.
  • A device that the battery is rechargeable.

1.4    SCOPE OF THE STUDY

Cell-phone batteries often die at very inconvenient times, with no ac power outlet nearby. This device uses standard 18650 batteries, which can be bought almost anywhere, to recharge cell phones and other portable devices like music players, e-book readers, and cameras.

The circuit chargers that typically come with cell phones and other portable devices charge the battery for a brief period of time. Then, they stop, check the voltage, and verify the temperature against an internal table before deciding to stop or continue the charging process. The charging regulation required by the battery is performed within the device getting charged, and this design takes advantage of that circuit.

1.5    LIMITATION OF THE STUDY

The limitation of these design is that it can only be used for the charging of mobile phone device and it should not in any case used to charge other high current consumption device such as laptops, car batteries etc.

 

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