Welding device for joining components by means of resistance welding, having: - an electrode pair 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 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 can be generated, - a coupling joint which is connected mechanically between the power source and the electrode pairs 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 has a moving welding electrode , and the at least further electrode pair 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 , and a welding transformer is associated with the further electrode pair , so that the two welding currents (I S1 , I S2 ) supplied by the welding transformers join the joining partners at two joining locations by means of resistance welding; and a respective current measuring coil is connected per electrode pair 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 are independently controllable circuits with the separately controlled transformers . - an electrode pair 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 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 can be generated, - a coupling joint which is connected mechanically between the power source and the electrode pairs 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 has a moving welding electrode , and the at least further electrode pair 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 , and a welding transformer is associated with the further electrode pair , so that the two welding currents (I S1 , I S2 ) supplied by the welding transformers join the joining partners at two joining locations by means of resistance welding; and a respective current measuring coil is connected per electrode pair 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 are independently controllable circuits with the separately controlled transformers . <EOS>