72V 12.5Ah Custom Battery Pack for LMX Bike

About: We design and create batteries, electric vehicles and DIY electronics. We research, develop and document our creations to inspire others. Our mission is to bring resources to people all over the world and ...

Building video of a 72V 12.5Ah 100 cells high power Li-ion battery designed for a 4kW ligthweight freeride LMX bike.


- 20 serial, 5 paralleled 2.5Ah 14C max continuous Samsung INR18650 25R LiNiCoAlO2 (NCA) Lithium-ion cells.

- Spot welded with double layer 0.12mm x 6mm pure nickel strips.

- 60A max continuous balancing function built-in BMS.

- 10 AWG wires according with the BMS and the aimed max discharge of 60A continuous.

- Individual insulated 10s5p shrink wrapped modules.

- XT90s anti-spark connectors for discharge port

- XT60 for charge port- weight: 4.9Kg

- Volume: 2 litres


- 175Amax continuous capabilities (12kW)

- 350Amax burst capabilities (24kW)

- 60Amax continuous BMS limited (4kW)

- 140Amax burst BMS limited (9kW

)- energy density: 450Wh/L

- specific energy: 215Wh/Kg.

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1:

Be the First to Share


    • Made with Math Contest

      Made with Math Contest
    • Cardboard Speed Challenge

      Cardboard Speed Challenge
    • Multi-Discipline Contest

      Multi-Discipline Contest

    2 Discussions


    2 years ago

    This guy needs to post an actual Instructable and not some teaser. TEASE!


    3 years ago

    Do you not post instructions on how to build these?