US 12,260,990 B2
Battery-ultracapacitor stud welder
Jeffrey Krupp, Vermilion, OH (US)
Assigned to Autab, LLC, Vermillion, OH (US)
Filed by Autab, LLC, Vermilion, OH (US)
Filed on Mar. 17, 2021, as Appl. No. 17/204,632.
Claims priority of provisional application 62/993,330, filed on Mar. 23, 2020.
Prior Publication US 2021/0296057 A1, Sep. 23, 2021
Int. Cl. H01G 11/50 (2013.01); B23K 9/10 (2006.01); B23K 9/20 (2006.01); H01M 10/0525 (2010.01)
CPC H01G 11/50 (2013.01) [B23K 9/1043 (2013.01); B23K 9/202 (2013.01); H01M 10/0525 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A drawn arc fastener welding system comprising:
a charging circuit operatively connected to an external power supply and configured to generate a charging current; wherein said external power supply comprises a LiNiMnCoO2 battery pack having a voltage of about 52V and providing a current of between about 20 amps to about 30 amps;
an energy storage device operatively connected to the charging circuit, wherein the energy storage device is configured to receive the charging current and to store a first amount of energy for supporting at least one drawn arc stud welding operation, wherein the energy storage device comprises a plurality of ultracapacitors in series and the energy storage device stores at least about 100 kJ of energy; and
a discharge circuit operatively connected to the energy storage device, wherein the discharge circuit is configured to receive an output current from the energy storage device and communicate a discharge current to a drawn arc stud welding tool for a first time duration.