Parallel welding device of lithium battery packs

The invention discloses a parallel welding device of lithium battery packs. The parallel welding device comprises a feeding conveying belt and a discharging conveying belt. The parallel welding deviceis characterized in that a welding table is slidingly arranged on the discharging conveying belt, an upper cross beam and a lower cross beam are arranged above the welding table, a sliding table is slidingly arranged on the lower cross beam, a grabbing plate is arranged below the sliding table, swing rods, a drive block and a mounting plate are arranged on the upper cross beam, a roller is rotationally arranged at the upper end of each swing rod, a spring is connected between the two swing rods, a welding head is arranged at the lower end of each swing rod, slopes are formed on the two sidesof the drive block separately, a drive motor and a connecting frame rod are arranged on the mounting plate, the drive motor is hinged to one end of a crank, the other end of the crank is hinged to oneend of the connecting fram