Welding device for joining components by means of resistance welding, having: - an electrode pair (15, 17) by means of which an electrode force and an electrical welding current I S1 can be introduced into the components, - at least one further electrode pair (15, 17) by means of which a further electrode force and a further electrical welding current I S2 can be introduced into the components, - a power source by means of which the electrode forces (21, 23) can be generated, - a coupling joint which is connected mechanically between the power source and the electrode pairs (15, 17) and by means of which a total electrode force that can be generated by the power source can be divided up into the electrode force and the further electrode force. - wherein the one electrode pair (15, 17) has a moving welding electrode, and the at least further electrode pair (15, 17) has a further moving welding electrode, and the moving welding electrode is mounted so as to be longitudinally displaceable by means of a linear guide, and the further moving welding electrode is mounted so as to be longitudinally displaceable by means of a further linear guide, characterized in that a welding transformer is associated with an electrode pair (15, 17), and a welding transformer is associated with the further electrode pair (17, 15), so that the two welding currents (I S1, I S2) supplied by the welding transformers (2, 3) join the joining partners at two joining locations by means of resistance welding; and a respective current measuring coil (75, 77) is connected per electrode pair (15, 17) to regulate the welding currents (I S1, I S2) in the welding current circuits; and the two circuits via the joining partners to be welded and the respective electrode pairs (15, 17) are independently controllable circuits with the separately controlled transformers (71, 73). - an electrode pair (15, 17) by means of which an electrode force and an electrical welding current I S1 can be introduced into the components, - at least one further electrode pair (15, 17) by means of which a further electrode force and a further electrical welding current I S2 can be introduced into the components, - a power source by means of which the electrode forces (21, 23) can be generated, - a coupling joint which is connected mechanically between the power source and the electrode pairs (15, 17) and by means of which a total electrode force that can be generated by the power source can be divided up into the electrode force and the further electrode force. - wherein the one electrode pair (15, 17) has a moving welding electrode, and the at least further electrode pair (15, 17) has a further moving welding electrode, and the moving welding electrode is mounted so as to be longitudinally displaceable by means of a linear guide, and the further moving welding electrode is mounted so as to be longitudinally displaceable by means of a further linear guide, characterized in that a welding transformer is associated with an electrode pair (15, 17), and a welding transformer is associated with the further electrode pair (17, 15), so that the two welding currents (I S1, I S2) supplied by the welding transformers (2, 3) join the joining partners at two joining locations by means of resistance welding; and a respective current measuring coil (75, 77) is connected per electrode pair (15, 17) to regulate the welding currents (I S1, I S2) in the welding current circuits; and the two circuits via the joining partners to be welded and the respective electrode pairs (15, 17) are independently controllable circuits with the separately controlled transformers (71, 73).