The Taylor-winfield Corporation

David Lund

William E Mullane

In a storage battery having a plurality of electrically insulating vertical partitions, the method of the invention comprises sandwiching each partition, successively, between a pair of terminals of lead or other easily fusible material of the so-called 'tombstone' type, that is, of 'L' shape in which the vertical or riser portion of one terminal has a horizontal pin which extends through a hole in the partition and through a hole in the riser portion of the other terminal. An insulating sheet and induction coil are placed against the end of the pin by a fusing apparatus which is provided with a pair of arms which are pivotally operated by a fluid cylinder, one arm carrying the above-mentioned coil and insulating sheet and the other acting as a pusher. The terminal pairs and partition are squeezed together by said arms and thereafter induction current is applied to the coil to fuse the perimetrical portion of the pin and surrounding surface of the hole of the other terminal so as to fill the void therebetween and form a solid intercell connection.

Welding intercell connections by induction heating

A method of making intercell connections in a lead-acid storage battery. The battery has a plurality of pairs of vertical risers of lead or other readily feasible material, each pair sandwiching an electrically insulating vertical partition. The method comprises forming a horizontal hole in a partition, squeezing together such as by hydraulic cylinders, a pair of risers against its corresponding partition and applying coils energized by high frequency electrical current against the outer surfaces of the risers adjacent the hole and simultaneously squeezing together said pair of risers against its partition so as to fuse the riser material adjacent the hole and introduce it through and fill the hole. High quality readily reproducible intercell connections are thus formed successively throughout the battery.

Battery intercell connection by induction heating

Apparatus and method for induction heating 'over-the-partition' intercell connections in a lead/acid storage battery by melting both lead risers so as to form a connection over the top of the insulating partition. A mold is suspended on top of the partition and an induction coil is supported on the mold so as to surround the top portion of the intercell lead risers. High frequency alternating electrical current is applied to the coil so as to melt the top portion of the lead risers so that upon fusion thereof in the mold and cooling, the tops of the risers are interconnected. The interconnection bridges the top of the risers and rests on top of the partition. The invention lends itself to mass production in a very short time as compared to present methods. Excellent fusion quality is reliably obtained as compared to present methods.

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Minneapolis, MN, United States of America

David Lund