Preparation method of bimetallic strip of magnesium alloy and silver-plated copper foil
A bimetal sheet and magnesium alloy technology, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of large hydrogen evolution in batteries, uneven reaction of negative magnesium alloys, time-consuming operation, etc., and achieve grain growth and diffusion Uniformity, avoiding battery failure, uniform reaction effect
Inactive Publication Date: 2020-04-21
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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Problems solved by technology
The negative electrode magnesium alloy and the isolation metal foil are bonded together by the surrounding of the adhesive coating film. However, due to the uneven reaction of the negative electrode magnesium alloy, pitting corrosion is easy to occur, and the electrolyte enters between the negative electrode and the isolation metal foil, causing the internal resistance of the battery to decrease. increase, the battery discharge time is shortened, and even cannot meet the use requirements
Moreover, the gluing process is time-consuming and labor
Method used
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0031] Such as figure 1 and 2 , in the embodiment of the present application, the present application provides a method for preparing a bimetallic sheet of magnesium alloy and silver-plated copper foil, the method comprising the steps of:
[0032] S101: Select X magnesium alloy sheets 10, X silver-plated copper foil sheets 20, (X+1) stainless steel sheets 30, and 1 aluminum plate 40; wherein, X is a positive integer gre...
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Abstract
Provided is a preparation method of a bimetallic strip of a magnesium alloy and a silver-plated copper foil. By using the method, a thicker magnesium alloy plate and the silver-plated copper foil canbe firmly welded, so that the problem of short discharging time of a battery caused by reaction hole etching of a magnesium alloy negative electrode of the water-activated battery is solved. Accordingto the preparation method of the bimetallic strip of the magnesium alloy and the silver-plated copper foil, the magnesium alloy is welded to the silver-plated copper foil at the welding temperature of 380-400 DEG C; the welding temperature provides proper energy for atomic diffusion, atomic diffusion is sufficient, large-grain grain boundaries migrate out of an initial connection position, commoncrystal grains are generated between the connecting grain boundaries, the good diffusion welding joint tissue is generated, welding is firm, the grain growth and diffusion are uniform under the temperature, the magnesium alloy is uniform in surface reaction when used as the negative electrode, battery failure due to hole etching is avoided, and the battery can be discharged for a long time, so that the working time of the long-service-life seawater battery is prolonged to 9 h from the original 5h.
Description
technical field [0001] The invention belongs to the technical field of seawater batteries, and in particular relates to a method for preparing bimetallic sheets of magnesium alloy and silver-plated copper foil. Background technique [0002] Magnesium-silver chloride long-life seawater battery is used as a buoy power source due to its characteristics of fast activation, long working time, long storage life, and safe use. The negative electrode magnesium alloy and the isolation metal foil are bonded together by the surrounding of the adhesive coating film, but due to the uneven reaction of the negative electrode magnesium alloy, pitting corrosion is easy to occur, and the electrolyte enters between the negative electrode and the isolation metal foil, causing the internal resistance of the battery to decrease. increase, the battery discharge time is shortened, and even cannot meet the usage requirements. Moreover, the gluing process is time-consuming and laborious, and the dai...
Claims
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Login to view more IPC IPC(8): B23K20/14B23K20/26
CPCB23K20/14B23K20/26
Inventor 黄锐妮刘延东王子佳葛薇薇
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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