Matsushita Electric Industrial Co., Ltd.

Rikio Miyagi

Masao Ito

Takashi Hattori

Fumiaki Seta

Kunio Makino

Akitoshi Hiramatsu

Kensaku Tsuchida

Shinya Ajisaka

Hiroshi Hori

Entry of molten lead into the space between the electrode plates from the gap between welding jig,and electrode plate lead,is prevented by a construction of pouring nozzle,in which the flow speed and temperature of the molten lead when molten lead is poured into the recess of the welding jig,are lowered. Also, admixture of oxide and/or scum is eliminated by discharging the molten lead from the bottom of reservoir,. Furthermore, reliable joining of strap,, electrode plate leads,and pillar electrode,is achieved by prioritising melting of electrode plate leads,, pillar electrode,and the vicinity thereof by plasma welding.

Method of manufacturing an electrode plate assembly for lead accumulator and device therefor

A number of strap-forming metal molds 12 corresponding to the number of steps are arranged on a circumferential track and are fed to the devices of the respective steps A.about.F together with electrode plate groups 10. Position A is an electrode plate group 10 introduction position; position B is a flux coating position in which electrode plate leads 6 are coated with flux; position C is an auxiliary heating position in which a mold 8 is heated to the temperature of the molten lead; position D is a molten lead pouring position in which molten lead is poured into a mold 8; position E is a strap-forming position in which electrode plate leads 6 are inserted into the molten lead, fused and cooled and the molten lead is solidified; position F is a discharge position in which a completed electrode plate assembly is discharged. Heating of a mold 8 is commenced by inductive heating from position F and is continued to position E.

Device for manufacturing an electrode plate assembly for lead accumulator

The invention provides a method for making a thin strap in a stable molten state in producing a plate group for a lead acid storage battery by integrally welding lugs of a plurality of plates of the same polarity by cast-on-strap process. According to the method, the strap is formed in the following manner. A molten lead is fed in a strap forming tool surrounded by an induction heating coil; control of the temperature of the molten lead and preheating of the tips of the plate lugs are carried out by the induction heating coil; the tips of the lugs is dipped in the molten lead and kept at a given temperature; and, thereafter, the mold is forcedly cooled to solidify the molten lead.

Lead acid storage battery and method for making same

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Kosai, Japan

Rikio Miyagi