Introduction: DIY 18650 Battery Pack

By www.facebook.com/evmadrid
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 en…

Building a 48V 42Ah 13s15p 18650 lithium-ion cells battery pack. Made from rejected 10s4p Bosch packs.- 13 serial, 15 paralleled 2850mAh 2C max LG 18650 Lithium-ion cells.- Spot welded 0.15mm x 7mm 99% pure nickel strips.- 30-60 Amps BMS.- 12 AWG Wires.- 230mm diameter Battery Shrink Wrap- 12V - 48V (2s - 14s) configurable battery meter.- 50A anderson connectors for charge and discharge*Update: Battery is finally tested. It was unexpected that I can't even notice it is really charging touching at it. It charges at the same room temperature at 0.15C (6A). Discharge rates between 10A - 20A doesn't also reach warmness (0.5C max). Charger (fan built-in) gets pretty hot during CC phase (~5 hours) then only warm at CV phase.*For EV performance info: Tested 100Km of mixed torture test ride (uphill downhill rush, hard accelerations and slow downs, full throttle half the rode, speed between 20-25 mph, all at night with real 15W lights) then battery Voltage remained at 48.1V that makes a whole 200KM of night hardest consumption range. (EV is not human powered built-in)

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