Combined electrode structure of space solar cell array conductor resistance welding

Abstract

The invention discloses a combined electrode structure of space solar cell array conductor resistance welding. The combined electrode structure comprises a positive electrode pressing welding part, anegative electrode pressing welding part and a negative electrode clamping base plate, wherein the positive electrode pressing welding part, the negative electrode pressing welding part and the negative electrode clamping base plate are combined to use during welding; during welding, the positive electrode pressing welding part and the negative electrode pressing welding part are connected with awelding machine electrode arm, and the positive electrode pressing welding part and the negative electrode pressing welding part are located on the same side of a welded object; the negative electrodeclamping base plate is located on the other side of the welded object; the welding machine electrode arm carries out pressing welding on a single side through the positive electrode pressing weldingpart and the negative electrode pressing welding part; welding current is outputted from the power supply of a welding machine and is flown into from the positive electrode pressing welding part via an upper lead on the welding arm, flows through each welded surface of a welded piece and the negative electrode clamping base plate and is flown out from the negative electrode pressing welding part;and the positive electrode pressing welding part and the negative electrode pressing welding part are made of pure molybdenum materials and the negative electrode clamping base plate is made of a brass material. The combined electrode structure is stable in welding performance and reliable in welding point, and the welding process is convenience in implementation and efficient.

Description

technical field [0001] The invention relates to a combined electrode structure for resistance welding of space solar battery array wires, belonging to the field of welding equipment. Background technique [0002] When assembling a solar cell array in space, it is necessary to perform resistance welding on the metal connecting piece connected to the solar cell and the power transmission wire of the multi-strand solar cell array. Traditional resistance welding methods include parallel welding and butt welding. [0003] Parallel welding uses a pair of welding electrodes located on the same side of the welding object and parallel to each other. Since the electrodes are arranged in parallel and only contact with one welding surface, the welding current cannot completely and evenly pass through the welding object with multi-layer and composite structures vertically. The stability of welding with multi-strand core wires is restricted by equipment and process windows, and the proces...

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Problems solved by technology

[0003] Parallel welding uses a pair of welding electrodes located on the same side of the welding object and parallel to each other. Since the electrodes are arranged in parallel and only contact with one welding surface, the welding current cannot completely and evenly pass through the welding object with multi-layer and composite structures vertically. The stability of welding with multi-strand core wires is restricted by equipment and process windows, and the process control is difficult; butt welding adopts a pair of electrodes that hold the welding object on both sides at the same time, and the current can directly pass through the multi-layer and composite structures vertically during welding. The welding object, the welding current distribution is relatively uniform, but when the metal connecting sheet is welded, it has formed a combination with the solar cell and the solar cell circuit substrate. One side of the metal connecting sheet is in contact with the core of the wire to be welded, and the other side is fixed with For the solar cell circuit substrate parallel to this surface, the traditional butt welding electrodes are limited by the space size and cannot be arranged in pairs with the welding objects clamped

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