DIY Battery Pack: Steps and Precaution

Oct 22, 2020   Pageview:90

Although we might not realize it, the battery is one of the essential packs that is necessary for some of our home appliances. After all, without batteries, our remote TV’s, wall clocks, and many more won’t be able to work properly.

Knowing how important batteries are, it won’t be a surprise if some people delve into the world of batteries. Creating your own battery is one of the things battery fans love to do. If you are interested in making one, don’t worry! Here, we will help you create a DIY battery pack by giving the steps and the precautions to do it.

Can you DIY a battery pack?

As stated before, a DIY battery pack is a pack of batteries that is made by the person by himself. They might look less professional than the batteries sold in stores, but they are not less powerful than the factory-manufactured ones.

Since they are homemade, they tend to be cheaper than the ones sold in stores. Although you might have bought the materials in bulk, making it seem expensive in the beginning, it is actually cheaper than factory-made batteries. The gap between the two kinds of batteries’ price won’t be a lot though unless you create multiple packs all at once. Hence, don’t be surprised if the videos showing DIY battery packs on YouTube show the person making multiple packs while showing the tutorial.

Before you create your own battery, make sure you have the safety precautions to make the battery. Make sure you wear electric gloves and protective goggles. When you create the battery, you must move other objects away from the battery first in case there is some unnecessary trouble during the process of the battery creation.

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How do you DIY a battery pack?

If you have prepared yourself, it’s time to create your own DIY battery pack! Here are materials you need for your battery:

●A 18650 battery (since we’ll be making 18650 battery)


●Several Ni Strips

●Indicator for the battery level

●Rocker Switch

●Jack (DC)

●Battery Holder for 18650 batteries

●Screws that are 3M x 10mm

During the process, you will be using:

●A Spot Welder

●Printer to create 3D objects

●A cutter or wire Stripper

●Blower for hot air


●Li-ion Charger

Let’s get started!

1. Place the 18650 batteries together

When you have gotten your 18650 batteries, place them in the battery holders. Make sure you arrange it according to your desired battery pack. So if you make 3 parallel groups in series, and the group consists of 5 batteries, then you will need 15 batteries.

2. Connect the 18650 batteries

Connect the batteries together by either soldering them or spot welding them. You can look at the next section for further information.

3. Add BMS

A battery management system (BMS) is important since it is used to manage almost everything for the batteries. Without it, you won’t be able to balance the voltage or prevent it from getting over-discharged. So, don’t forget to add the BMS!

4. Print the protective case

When you have put everything together, time to take out the protective case! You can buy it, but it’s best to print it since you’ll know the exact measurement you need.

5. Wire the batteries

After you’ve placed them all together, it’s time to wire them together! For those who do not know how to wire them, don’t worry because there is a simple guide above that can help you visualize the wiring process.

6. Put them all together

When you’ve done all the steps above, it’s time to put them all together! Once you’ve done so, you’ll get your DIY 18650 battery! Pretty simple,isn’t it?

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What should you pay attention to when you DIY a battery pack?

Here are some things you should take note when you made your DIY battery pack:

1. Get the proper 18650 batteries

When we talk about proper 18650 batteries, we are talking about batteries that can actually be used properly. There are, after all, some factory rejects hidden among proper batteries.

When you purchase your batteries, make sure they are from well-known brands that guarantee the batteries’ quality. If you come across batteries that are cheaper than normal, do not purchase them as they tend to be repackaged batteries. Do not buy batteries with the name “fire” on it, as they are actually rejects.

So no matter how cheap the battery might look, do not buy them! Or else, you might come across trouble later on when you build your own DIY battery pack.

2. Get the proper battery strips

Since we will be building 18650 DIY battery packs, you will need to use nickel strips. There are two kinds of nickel strips, and they are made either from pure nickel or plated with nickel. You can purchase either one according to your budget, but I recommend using the pure nickel one as they have lower resistance. Lower resistance means lower heat, and lower heat for batteries is always a good thing.

3. Find a method to connect the 18650 batteries

There are two ways to connect 18650 batteries, and they are spot welding and soldering. Soldering tends to use lots of heat, and the heat does not go away easily. There is a possibility the heat might affect the battery, hence why people prefer spot welding.

Spot welding does not apply as much heat as soldering, but they tend to be pricier. To get them cheaper, you can purchase then in online stores.

4. Protective gloves and goggles

Making the pack isn’t a complicated process, but it’s not easy either. It’s best to wear electrical gloves and protective gloves for safety measures (especially during soldering or spot welding).

Making a DIY battery pack isn’t as hard as you thought, isn’t it? So don’t worry, you will definitely be able to create the perfect DIY battery pack for your needs! You might even fall for batteries even more when making it!

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