Diaphragm for nickel-cadmium battery, preparation method thereof and battery

A nickel-cadmium battery and diaphragm technology, which is applied in the direction of nickel storage battery, alkaline storage battery, battery pack parts, etc., can solve the cycle performance degradation? Low-level problems, to achieve the effect of improving charging efficiency, increasing the rate of oxygen absorption by the negative electrode, and preventing growth

Inactive Publication Date: 2014-05-28
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is that the cycle performance of the existing nickel-cadmium battery decreases after being charged with a small current? Low defects, thereby providing a separator for nickel-cadmium batteries that can improve the cycle performance of nickel-cadmium batteries after charging with a small current

Method used

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  • Diaphragm for nickel-cadmium battery, preparation method thereof and battery
  • Diaphragm for nickel-cadmium battery, preparation method thereof and battery

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preparation example Construction

[0016] The invention discloses a method for preparing a diaphragm for a nickel-cadmium battery. The base material is dipped in an aqueous solution of manganese salt, taken out after dipping, and dried. The soaking time is not particularly limited, as long as the substrate can be completely wetted, the soaking time in the embodiment of the present invention is preferably 30-50 min. The drying method is a general drying method known to those skilled in the art, such as natural drying or heating drying, etc., and the temperature of heating drying generally does not exceed 180°C.

[0017] The concentration of the manganese salt in the aqueous solution containing the manganese salt can be any concentration, preferably the weight percentage of the manganese salt in the aqueous solution containing the manganese salt is 0.6%-12%.

[0018] A secondary nickel-cadmium battery, the battery includes a pole core and an alkaline electrolyte, the pole core and the alkaline electrolyte are sea...

Embodiment 1

[0025] This embodiment is used to illustrate the secondary nickel-cadmium battery provided by the present invention

[0026] (1) Preparation of diaphragm

[0027] Set the areal density to 60g / m 2 Nylon fiber paper with a liquid absorption rate of 300% is continuously passed through a certain 0.6wt% manganese sulfate solution, and the immersion time of the diaphragm in the solution is guaranteed to be 30 minutes. After immersion, the nylon fiber paper is taken out and dried at 45°C. Cutting and cutting to make the finished separator paper, the size of the separator paper is 445mm×34.5mm×0.15mm. The measured content of manganese salt in the diaphragm is 5g / m 2 . The method for measuring the manganese salt content in the diaphragm after impregnation is: weigh the weight of the diaphragm before impregnation, and record it as X g / m 2 , the weight of the membrane after dipping and drying, denoted as Y g / m 2 , then the content of manganese salt in the diaphragm is (Y-X)g / m 2 . ...

Embodiment 2

[0035] This embodiment is used to illustrate the secondary nickel-cadmium battery provided by the present invention

[0036](1) Preparation of diaphragm

[0037] Set the areal density to 60g / m 2 Diaphragm nylon fiber paper with a liquid absorption rate of 300% is continuously passed through a certain 4.2%wt manganese sulfate solution, and the soaking time is 50 minutes. After dipping, the nylon fiber paper is taken out, dried at 45°C, and cut and cut. Finished separator paper, the size of separator paper is 445mm×34.5mm×0.15mm. The measured content of manganese salt in the diaphragm is 15g / m 2 .

[0038] (2) Preparation of negative electrode

[0039] With 75 kilograms of negative electrode active material cadmium oxide, 5 kilograms of sponge cadmium (Hebei Dacheng Company) and 10 kilograms concentration are the aqueous solution of 3% by weight of hydroxypropyl methylcellulose and 4 kilograms of water, fully stir, then add 1.2 kilograms of solid The polytetrafluoroethylene...

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Abstract

The invention provides a diaphragm for a nickel-cadmium battery and belongs to the field of nickel-cadmium batteries. The diaphragm comprises a base material and a manganese salt positioned in pores of the base material and / or on the surface of the base material. The invention also provides a preparation method for the diaphragm for the nickel-cadmium battery, and a nickel-cadmium secondary battery which comprises the diaphragm. The nickel-cadmium secondary battery with the diaphragm can effectively prevent cadmium dendritic crystals from growing, inhibit further growth of the cadmium dendritic crystals, improve charging efficiency in the later charging period and greatly improve slow charging cycle performance, and can be widely applied to the nickel-cadmium batteries.

Description

technical field [0001] The invention relates to a diaphragm for a battery, a preparation method thereof, and a battery using the diaphragm, in particular to a diaphragm for a nickel-cadmium battery, a preparation method thereof, and a secondary nickel-cadmium battery using the diaphragm. Background technique [0002] Nickel-cadmium batteries have developed rapidly since they were invented in 1901. In the ten years from 1976 to 1986, the sales of nickel-cadmium batteries in the world have tripled, from less than 500 million US dollars to 1.5 billion. Dollar. In recent years, the nickel-cadmium battery market has developed into one of the most important components of the secondary battery market. [0003] Compared with other batteries, nickel-cadmium batteries have great advantages in overcharge resistance, high current discharge, fast charging, safety and low cost. However, its slow charging performance (low current, long-term continuous charging) ) has not been improved. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/30H01M50/403H01M50/431H01M50/491
CPCY02E60/124Y02E60/10
Inventor 郑顺娜张学全
Owner BYD CO LTD
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