A metal plate and an electrode in a polymer lithium ion secondary battery or the like are welded certainly, and it is accomplished to further improve the reliability and the durability thereof. Each of an upper metal plate (7 a) and a lower metal plate (9 a) on the positive pole/terminal is welded to a pole/terminal of positive electrode (3) so that the pole/terminal of positive electrode (3) may be sandwiched from each of the upper and lower sides. Moreover, each of an upper metal plate (7 b) and a lower metal plate (9 b) on the negative pole/terminal is welded to a pole/terminal of negative electrode (5) so that the pole/terminal of negative electrode (5) may be sandwiched from each of the upper and lower sides. This eliminates occurrence of poor welding in the electric resistance welding.

Battery, method of manufacturing the same, method of manufacturing weldment, and pedestal

A metallic plate and an electrode of, e.g., a polymer lithium ion secondary cell are welded to each other securely so as to further improve the reliability and durability. An upper metallic plate (7a) and a lower metallic plate (9a) of a positive plate are so welded to an electrode (3) of the positive plate that they vertically sandwich the electrode (3). Similarly, an upper metallic plate (7b) and a lower metallic plate (9b) are so welded to an electrode (5) of a negative plate that they sandwich the electrode (5). Thus defective electric resistance welding is prevented.

Cell, cell production method, welded article production method and pedestal

A method of producing a lithium battery includes laser welding at least one current collector (230) to an electrode (220). A refractory material may be provided adjacent the electrode (220) before the laser welding step.

Lithium battery manufacturing method

[PROBLEMS] To provide a method for judging conformity of spot welding by nondestructive inspection. [MEANS FOR SOLVING PROBLEMS] An electrode, which has substantially a convex electrode surface and, at the center portion, a recess set at a predetermined depth where a welding trace formed on the surface of a metal body reaches a deepest part when a good nugget is formed by spot welding, is used as at least an electrode for performing spot welding. Conformity of spot welding is judged based on the shape of the welding trace formed on the surface of a metal body by spot welding in correspondence with such recess.

Spot welding method, method for judging shape of nugget, spot welding machine, and spot welding electrode

A spot welding electrode includes a shank within which cooling water is communicated, and an electrode tip. The shank is provided on the top thereof with a closed head, on which the electrode tip is dismoutably fixed.

Spot welding electrode

Electrodes for use in spot welding which can spot-weld a metallic material having a large electric conductivity and a large thermal conductivity with a small electric current. A cup-shaped cap made of material having a small electric conductivity, a small thermal conductivity and a high melting point temperature as compared to the material to be welded, for instance, made of titanium, is fitted arond a tip end portion of an electrode main body. The top surface of the cap is formed in a spherical shape having a large radius of curvature, and a depression is formed at the central portion of the top surface. The thickness of the top wall is thick at the central portion and thin at the peripheral portion. Plating of soft metal having a better thermal conductivity than the electrode main body is applied onto the entire inner surface of the cap coming into contact with the electrode main body. At least between the top wall of the cap and the tip end surface of the electrode main body, is interposed a plate member made of metal having a better electric conductivity than the electrode main body and a good thermal conductivity and a small hardness as compared to the cap. At least the top surface of the cap is subjected to nitriding treatment.

Electrodes for use in spot welding

PURPOSE:To provide the electrode suitable for spot welding of metallic sheets having a high electric conductivity and heat conductivity such as aluminum and an aluminum alloy. CONSTITUTION:Metallic materials to be welded not shown by the figure having high electric conductivity and heat conductivity such as the aluminum alloy are superposed on each other and these are held between a couple of upper and lower electrodes 1A. In this electrode 1A, in a state with a silver interposing plate 15 abutted on the tip of a Cu-Cr alloy electrode main body 2A, a titanium cup-shaped cap 4A is fitted integrally on a thread part of the tip of the electrode main body 2A, the vertex surface 6 of a vertex wall 5A of the cap 4A is formed as a part of the spherical surface and an indentation 8 in a circular hole shape is formed on a central part of the vertex surface 6.

Elektroden zum verwenden beim punktschweissen

PURPOSE:To perform spot welding with a small amount of electric current by fitting a cup-type cap of higher melting point material with lower electric conductivity and lower thermal conductivity as compared with materials to be welded to an electrode main body and forming the vertex surface of said cap into a spherical shape and a dent on its central part. CONSTITUTION:The cup-type Ti cap 4 is fitted to a screw 3 of the tip of the electrode main body 2 of an electrode 1. The cap 4 consists of a vertex wall 5 and a peripheral wall 8 and the dent 7 with a round hole shape is formed on the central part of the vertex surface 6 and a screw 9 is formed on the inner peripheral surface of the peripheral wall 8. The local heating is not generated on the contact surface between the materials 10 and 11 to be welded due to the dent 7 and an excessive increase of bearing on the central part is avoided and erosion of a pickup and the cap 4 is prevented and the satisfactory continuous spot property is ensured. When the height L of the cap 4 is extended, the heat capacity increases and the contact area of a screwed part increases and accordingly, the heat transfer becomes satisfactory and the coupled area with the main body 4 increases and looseness is prevented. By this method, the durability is improved and a nugget with stable quality can be obtained.

Electrode for spot welding

PURPOSE:To obtain the electrodes suitable for spot welding of metallic sheets having high electric conductivity and heat conductivity such as aluminum and an aluminum alloy CONSTITUTION:Metallic materials to be welded having high electric conductivity and heat conductivity such as the aluminum alloy are superposed on each other and these are held between a couple of upper and lower electrodes 1 These electrodes 1 are formed by fitting a titanium cup-shaped cap 4 integrally on a thread part 3 of the tip of a Cu-Cr alloy electrode main body 2 with the vertex surface 6 of a vertex wall 5 of the cap 4 as a part of the spherical surface and an indentation 8 having a round hole shape is formed on the central part of the vertex surface 6

Shigekura Eiichi

Papers

Electrodes for use in spot welding

Spot welding electrode

Elektroden zum verwenden beim punktschweissen

Electrode for spot welding

Spot welding electrodes