A preparation method of resistance welding electrode for connecting nickel sheet in lithium battery
A technology of resistance welding and lithium batteries, applied in pressure electrodes, electrode features, welding equipment, etc., to achieve high softening resistance, reduce equipment investment costs, and good surface quality.
Active Publication Date: 2016-08-17
中铝洛阳铜加工有限公司
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for preparing a resistance welding electrode used for lithium batteries to connect nickel sheets, which has high strength, high conductivity, and high resistance to softening temperature, and solves the problem of powder ingot storage. And the problem of heating and oxidation of powder ingots before extrusion improves the surface quality of processed materials, improves the yield of finished products, and reduces costs
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Embodiment 1
[0021] The weight percentage of Al is 0.5-1.0% in proportion, and Al will be formed after internal oxidation 2 o 3 The weight percentage is 0.8-2.2%, and the balance is Cu; the processing process adopted is: water atomization powder making → powder drying → screening → oxygen source preparation → powder mixing → rubber sleeve → cold isostatic pressing → internal Oxidation, reduction, sintering integrated heat treatment → oxygen-free copper sheath sealing → powder ingot heating → hot extrusion → sawing → straightening → reducing forging → packaging and storage;
[0022] Water atomization pulverization: use 100kg intermediate frequency smelting furnace for smelting, first add high-purity oxygen-free electric copper in the intermediate frequency furnace for smelting for 50-100 minutes, and cover the smelting process with charcoal; then add copper-13% phosphorus master alloy for deoxidation of 0.5- After 5 minutes, add copper-30% aluminum master alloy and melt for 4-10 minutes. T...
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Abstract
Disclosed is a production method of a resistance welding electrode for lithium battery connection nickel pieces. The weight percentage of Al in proportioning ranges from 0.5% to 1.0%, the weight percentage of A12O3 after internal oxidation ranges from 0.8% to 2.2%, and the balance is Cu. The production technology includes: water atomization for powder making; power drying; screening; oxygen source preparation; powder mixing; glue sheath filling; isostatic cool pressing; internal oxidation, reduction and sintering integrated heat treatment; oxygen-free copper coating seal; powder ingot heating; hot extrusion; saw cutting; straightening; reducing forging and packaging and warehousing. The resistance welding electrode produced by the production method is high in strength, electrical conductivity and resistance to softening temperature, the problem about powder ingot storage and powder ingot heating oxidation before extrusion is solved, surface quality of produced workpieces is improved, yield is increased, and cost is lowered.
Description
technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, relates to the fields of automobile resistance welding electrodes, battery (nickel metal hydride batteries, lithium batteries, etc.) welding electrodes and the like, in particular to a preparation method of a resistance welding electrode used for connecting nickel sheets to lithium batteries. Background technique [0002] In modern industry, the extensive use of production lines, automatic welding machines, and manipulators requires welding to be completed at high speed, high tempo, and high quality, which puts forward higher requirements for all components of welding equipment. Resistance welding electrodes need to be replaced frequently during use because they are frequently in contact with the workpiece under high temperature and high pressure. Chromium-zirconium copper (Cu-Cr-Zr series), the electrode material used in large quantities, is seriously damaged due to its low ...
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IPC IPC(8): B23K35/40B23K11/30C22C9/00C22F1/08
CPCB23K11/3018B23K35/40C22C9/00C22F1/08
Inventor 牛立业曹先杰蒋小亮李欣华杜家荣韩卫光袁新民郭慧祥
Owner 中铝洛阳铜加工有限公司