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The Vextrek prototype lithium ion pack for dirt bikes is almost ready! Our goal was to “GO BIG” on everything. This is a 72V 50aHr (20S/12P) pack of Molicel P42 cells connected with .25mm thick copper. Since cooper is 4x more conductive than nickel, this pack can easily handle high current. As...

Pack is connected with .25 mm thick pure copper sheets for the series and parallel connections and thicker copper for the terminal connections. Recently added BMS wires and looking for any other suggestions that can make this pack better. Thanks. https://fb.watch/gSSUy5nUy3/?mibextid=qC1gEa

Prototype Lithium Pack Update: Next step for the custom built 80V/52aHr lithium ion pack for Shandoka Electric Motorcycles will be “bench testing” followed by actual road testing. Initial diagnostic tests show that this is a well balanced lithium pack Vextrek. The difference between the highest...

This is our new 100 Volt lithium ion battery pack for the next electric go kart project. The two modules shown below will be connected in series to obtain a nominal voltage of 100V and the pack has 46 aHrs of energy storage capacity. The soft drink was included for relative size comparisons. We...

New to forum so I hope this of interest. This is the Vextrek electric go kart powered by an AC-9 Motor from HPEVS.com and 1238E Curtis Controller. Lithium battery pack is 22S/21P consisting of INR Samsung 25R cells which are connected with .25 pure copper bus bars. Maximum current is about...

Thanks for allowing us to join the forum. Vextrek, LLC is located in Augusta, GA and we have a Sunstone Pulse Arc welder which can spot weld pure copper to cylindrical lithium ion cells. We can spot weld packs in a variety of configurations so let us know if you are in need of a replacement...