Back to results
US 12,260,990 B2Granted
Battery-ultracapacitor stud welder
AssigneeAutab, LLC
InventorJeffrey Krupp
Life of this patent
Estimating the term…
Abstract
Devices and systems are disclosed herein for drawn arc stud welding. These systems and devices are extremely portable (<50 lbs.), deliver enough power for up to ¾″ diameter studs, and include a charging circuit, an energy storage device comprising a plurality of low ESR ultracapacitors, and a discharge circuit. The systems and devices can include a lithium nickel manganese cobalt oxide (LiNiMnCoO2) battery to supply the energy storage device with about 20 to about 30 amps of current between welding operations.
Claims14
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.
2 more elements
A drawn arc stud welding system comprising:
- a charging circuit operatively connected to an external power supply comprising a lithium battery having a voltage of about 52V and current of between about 20 amps and about 30 amps;
- and configured to generate a charging current;
- an energy storage device operatively connected to the charging circuit, wherein the energy storage device is configured to receive the charging current and 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 200 kJ of energy;
- 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;
- a pilot arc circuit operatively connected to the charging circuit and configured to deliver an initial current to the drawn arc stud welding tool to support a pilot arc;
- a constant current supply boost circuit operatively connected to the energy storage device and configured to drive a weld tool solenoid;
- and
- an internal discharge circuit operatively connected to the energy storage device.
5 more elements
Dependencies are inferred from the claim text.