Patent EP-2607008-A1 (EP)
Inventor: MEISSER CLAUDIO
IPC: H01L31/18
Filed: 2011-12-19
Abstract: The soldering device comprises: blank holder elements for holding a tape (5) on a surface of an electric busbar (3), where the blank holder elements are arranged one behind the other in series along a soldering line; and an induction antenna having a current path extending along the soldering line for an electrical alternating current, where the electrical alternating current is guided along the current path in such a way that it produces a magnetic alternating field in the soldering line and/or in an environment of the soldering line. The soldering device comprises: blank holder elements for holding a tape (5) on a surface of an electric busbar (3), where the blank holder elements are arranged one behind the other in series along a soldering line; and an induction antenna having a current path extending along the soldering line for an electrical alternating current, where the electrical alternating current is guided along the current path in such a way that it produces a magnetic alternating field in the soldering line and/or in an environment of the soldering line. The current path extends along portions of the soldering line, where the portions are arranged one behind the other in series in such a way that the magnetic alternating field in one of the portions of the soldering line is present in a phase opposite to the magnetic alternating field in other portions of the soldering line. The current path of the induction antenna comprises: a first portion that extends on a first side of a soldering plane, in which the soldering line lies in a distance to the soldering plane along one of the portions of the soldering line from which one of the portions of the soldering line is separated by an air gap; a second portion that extends on a second side opposite to the first side of the soldering plane in a distance to the soldering plane along other portions of the soldering line from which the other portions of the soldering line is separated by an air gap, where an end of the first portion of the current path is connected with an end of the second portion of the current path in such a way that the first and second portions of the current path are electrically switched in series, and the electrical alternating current in the first portion of the current path is present in the phase opposite to the electrical alternating current in the second portion of the current path; a third portion that extends on a first side of a soldering plane in a distance to the soldering plane along the other portions of the soldering line from which the other portions of the soldering line is separated by an air gap; and a fourth portion that extends on the second side of a soldering plane in a distance to the soldering plane along the one of the portions of the soldering line from which the one of the portions of the soldering line is separated by an air gap. The first and second portions of the current path are rectilinear, and lie one behind the other on a straight line extending into the soldering plane. The first, second, third and fourth portions of the current path are electrically connected in series so that the electrical alternating current in the first portion of the current path is present in the phase opposite to the electrical alternating current in the second portion of the current path, and the electrical alternating current in the third portion of the current path is present in the phase opposite to the electrical alternating current in the fourth portion of the current path. The blank holder elements in the soldering plane are vertically extended to the soldering line. An interstice is formed between two blank holder elements. The first portion of the current path is arranged in one of the interstices between the two blank holder elements, and the second portion of the current path is arranged in other interstices between the two blank holder elements. The first, second, third and fourth portions of the current path and/or the straight line extend parallel to the soldering line. The first and fourth portions of the current path are mirror-symmetrically formed with respect to the soldering plane, and/or the second and third portions of the current path are mirror-symmetrically formed respect to the soldering plane. The first and third portions of the current path extend along a first straight line, and the second and fourth portions of the current path extend along a second straight line. The first and second portions of the current path are designed as longitudinal portions of a first conductor portion arranged one behind the other, and the third and fourth portions of the current path are designed as longitudinal portions of a second conductor portion arranged one behind the other. The first and second conductor portions are twisted together. The first and fourth portions of the current path are arranged in one of the interstices between the two blank holder elements, and the second and third portions of the current path are arranged in the other interstices between the two blank holder elements. A first free space area is formed between the first and fourth portions of the current path, and/or a second free space area is formed between the second and third portions of the current path, where one of the blank holder elements is extended by the first and second free space areas. The current path of the induction antenna is a looped conductor having two legs, where an end of one leg is connected with an end of other leg. One of the two legs extends in a meander form along the soldering line, and the soldering plane, in which the soldering line lies, is crossed at separate locations so that the leg has longitudinal sections in its longitudinal direction, where the longitudinal sections extend along a curve, which extends on one side of the soldering plane and on other side of the soldering plane. The two legs extend in a plane perpendicular to the soldering plane, and/or are arranged parallel to a surface of a solar cell (1), and other two legs extend parallel to the one of the two legs. The electric alternating current in one of the two legs is present in the phase opposite to the electric alternating current in the other two legs.