DIY 18650 Battery Pack

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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