Introduction: DIY Lithium LiFePo4 12v 18 Amp Battery

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Hey! everyone My name is Steve

Today I’m Gonna show how I build this 12V 4S3P LiFePo4 Battery Pack With BMS and Balance Charging

Click Here to See The Video

Let's Start

Step 1: Features

Total Output Power

  • 18000 mAh @ 12.8V

Input Power " Charging "

  • 9000 mAh Constant Current
  • 14.6v Constant Voltage

Built-in Protection

  • Over Load Protection
  • Short Circuit Protection
  • Over Heat Protection
  • Low Voltage Protection
  • Over Voltage Protection
  • Cell Balancing


Note - Please see the images for better understanding

Step 2: Thing I've Used

LCSC

Banggood

Amazon

Aliexpress

Note - Please see the images for better understanding

Step 3: LiFePo4 Battery

These are really high-quality FBTech 32650 Cells this cells can easily get you 2000-2500 Cycles these are rated for 3C I’ve Personally Capacity Tested these cells and the result 100% what they are Rated for and I got 6000mAh

I love this Chemistry LiFePo4

Note - Please see the images for better understanding

Step 4: Sponsor

Today's Article is Sponsored by lcsc.com
They are the Largest Electronics Components Supplier From China Ready to Ship within 4 Hours and they ship World Wide

Step 5: Wiring Diagram

Note - Please see the images for better understanding

Step 6: Assembly

  • Make sure all the batteries are at the same voltage and same capacity
  • Now Assemble the holders
  • Now put one by one cell into the battery holders
  • Now use Kapton tape to tape it all

Kapton Tape - it is used to avoid the heat basically it is a heat resistance tape

Note - Please see the images for better understanding

Step 7: Welding

For Welding, I Used Spot Welder don't use soldering Iron It may damage your battery

  • Now cut down the Nickle plated strip tape at the Right Length
  • First, make a pair of 3 parallel battery as shown in the picture
  • and then connect all the 4 pair in series
  • This connection is called 4S 3P
  • You can also see the connection diagram above

4S - Stands for 4 Series

3P - Stands for 3 Parallel


Note - Please see the images for better understanding

Step 8: Battery Management System

To insulate the BMS From Battery I used 2-3 layer of Kapton Tape and Dual Sided tape

Note - Please see the images for better understanding

Step 9: BMS Wiring

I used 22 AWG Silicone wire and cut it to the right length and soldered wire according to Wiring Diagram and used XT60 As Output

Note - Please see the images for better understanding

Step 10: Finished

The Battery Has Been Finished I used a 55 Watt Car Headlight Bulb H4 to Test It and it Glows Very Bright

That's all for today guys!

Click Here to See The Video

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