Resistance welding method and resistance welding device for lead acid battery
First Claim
1. A resistance welding device comprising:
- a pair of resistance welding guns (4), (4) for pressing together two mutually facing surfaces of two members (e), (e) to be welded together and for applying an electric current to the members pressed together;
a resistance measuring device (11) for measuring an electric resistance value between the two members (e), (e) to be welded together while they are in pressure contact;
a constant power controller (13); and
means for providing a signal indicative of the measured resistance value to the constant power controller so that a controlled current set by the constant power controller (13) is applied through the resistance welding guns (4), (4) to both of the two members (e), (e) to be welded.
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Accused Products
Abstract
A resistance welding method wherein a resistance welding between cells of others used in the manufacturing of a lead acid battery, is carried out by means of a constant power control system. There are provided a method and a circuit device (A) therefore to carry out at intervals of a predetermined cycle that a resistance value between the members (e), (e) to be welded is, while applied with a current, measured by a resistance measuring device (11). The measured value is then inputted to a constant power controller (13), and a current having a current value corresponding thereto is supplied to both the members (e), (e) for current application for welding, thereby performing a stable and good weld. In addition, an up slope controller (15) is incorporated in the weld resistance circuit device (A) so that the resistance welding is performed through a current application which is increased gradually from a small welding current amount for application to both the members (e), (e), thereby preventing the occurrence of sparks during the resistance welding.
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Citations
5 Claims
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1. A resistance welding device comprising:
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a pair of resistance welding guns (4), (4) for pressing together two mutually facing surfaces of two members (e), (e) to be welded together and for applying an electric current to the members pressed together; a resistance measuring device (11) for measuring an electric resistance value between the two members (e), (e) to be welded together while they are in pressure contact; a constant power controller (13); and means for providing a signal indicative of the measured resistance value to the constant power controller so that a controlled current set by the constant power controller (13) is applied through the resistance welding guns (4), (4) to both of the two members (e), (e) to be welded. - View Dependent Claims (2)
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3. A method for resistance welding members comprising parts of a lead acid storage battery to each other, comprising the steps of:
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placing two facing surfaces of two members comprising part of a lead acid storage battery in pressurized contact; applying an electric current from a power control system to flow through said two members; and maintaining the power of said power control system constant as said facing surfaces of said members are welded to each other. - View Dependent Claims (4, 5)
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Specification