Vacuum sintering method of negative plate of nickel-hydrogen battery

Abstract

The invention relates to a manufacturing method of the cathode of the nickel hydrogen battery and specially relates to the manufacturing method of burning and cooling the cathode of the nickel hydrogen battery in specific vacuum furnace. Put the shaped cathodes into the two furnace chambers, A and B, pump the air out till the pressure is 2 multiplied by 10 to the power -2, input the cooling air to protect it, heat it to the temperature of 900deg.C and keep the temperature. Start cooling water till the temperature is less than 700deg.C, open the fan till the temperature is below 200deg.C, input the cooling air till the temperature drops to 45deg.C and take it out. The specific vacuum furnace designed by the invention has double furnace chambers, double heat preservation structures, can increase and reduce the temperature pretty quickly (A and B heat or cool it alternatively.) and is featured by low cost, simple operation and easy application. The cathode burn in vacuum has high electric capacity; the battery is featured by long useful life and strong overcharge and over-discharge endurance and the cathode plate has strong intensity, good flexibility and high yield and is promising to have wide market.

Description

technical field [0001] The invention relates to a method for manufacturing a negative plate of a nickel-hydrogen battery, in particular to a method for vacuum sintering and cooling protection of the negative plate of a nickel-hydrogen battery by using a special vacuum furnace. Background technique [0002] Negative plate is the main component of Ni-MH battery, its performance directly affects the performance of Ni-MH battery. At present, the traditional process of negative electrode plate widely used is wet processing of nickel-plated steel strip and dry processing of copper mesh. There is no vacuum sintering and cooling protection process in these two processing methods, and the finished negative plate assembly finished by wet processing of nickel-plated steel strip The disadvantages of the battery are: ① small plate unit density, low capacitance, ② short battery life, ③ poor resistance to overcharge and overdischarge. The disadvantages of the negative electrode plate proc...

AI Technical Summary

Problems solved by technology

At present, the traditional process of negative electrode plate widely used is wet processing of nickel-plated steel strip and dry processing of copper mesh. There is no vacuum sintering and cooling protection process in these two processing methods, and the finished negative plate assembly finished by wet processing of nickel-plated steel strip The disadvantages of the battery are: ①The plate unit density is small, the capacitance is low, ②The battery life is short, ③The battery has poor resistance to overcharge and overdischarge

For trial production, the equipment problem must be solved first, but a vacuum equipment is very expensive, generally requires hundreds of thousands of yuan, and the cooling speed and shape structure are not suitable for manufacturing polar plates

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