阅读说明：本技术 一种降低锌银贮备电池电压高波的方法 (Method for reducing voltage high wave of zinc-silver reserve battery ) 是由 董亚南 敬大红 刘强 张克彪 冯磊磊 石天飞 吴刚 覃韬 王浩 杨中发 于 2019-11-07 设计创作，主要内容包括：本方案公开了电池技术领域的一种降低锌银贮备电池电压高波的方法，包括锌银贮备电池的正电极、银粉和设有金属导线的金属网；在金属网上均匀涂覆银粉，并在专用正电极压片模具中以适当压力压制成正电极压片，再将制备好的正电极放置于高温中，持续8h以上。本方案中的方案可降低锌银贮备电池电压高波，以提高锌银贮备电池的可靠性。(The scheme discloses a method for reducing voltage high wave of a zinc-silver reserve battery in the technical field of batteries, which comprises a positive electrode of the zinc-silver reserve battery, silver powder and a metal net provided with a metal wire; the silver powder is evenly coated on the metal mesh, and is pressed into a positive electrode pressing sheet in a special positive electrode pressing sheet die at proper pressure, and then the prepared positive electrode is placed in high temperature for more than 8 hours. The scheme in the scheme can reduce the voltage high wave of the zinc-silver reserve battery so as to improve the reliability of the zinc-silver reserve battery.)

1. A method for reducing the voltage high wave of a zinc-silver reserve battery comprises a positive electrode of the zinc-silver reserve battery, silver powder and a metal net provided with a metal wire; the method is characterized in that: the silver powder is evenly coated on the metal net, the positive electrode and the metal net are pressed into a positive electrode pressing piece in a special positive electrode pressing piece die at proper pressure, and the prepared positive electrode is placed in high temperature for more than 8 hours.

2. The method for reducing the voltage high wave of the zinc-silver reserve battery according to claim 1, which is characterized in that: the positive electrode pressing sheets are wrapped by using diaphragms one by one, the wrapped positive electrode pressing sheets and the zinc oxide negative electrodes are overlapped in a crossed mode, the overlapped positive and negative electrodes are placed into a forming device, electrolyte is filled into the forming device for forming charging, and the positive and negative electrodes are washed to be neutral and dried after charging is completed to obtain the prepared positive and negative electrodes.

3. The method for reducing the voltage high wave of the zinc-silver reserve battery according to claim 2, characterized in that: the prepared positive electrode is bundled and fastened by a metal mold and is placed in an environment temperature of 180-220 ℃.

4. The method for reducing the voltage high wave of the zinc-silver reserve battery according to claim 3, characterized in that: it is left at the above temperature for 9 to 10 hours.

Technical Field

The invention relates to the technical field of batteries, in particular to a method for reducing voltage high waves of a zinc-silver reserve battery.

Background

The zinc-silver reserve battery is used as a main chemical power supply and is mainly applied to the field of special equipment, one of the main advantages is high working voltage precision, the allowable range of the working voltage tolerance of a 28V battery is usually 5V (upper tolerance +3V, lower tolerance-2V) namely 26-31V, and the aim of controlling the working voltage precision of the battery can be achieved by adopting the number of single batteries or adopting the measure of strictly controlling the generation of divalent silver oxide under the general condition. However, a large pulse current exists in most zinc-silver reserve batteries, the number of the single batteries is usually fixed, the batteries are limited by the quality and the external dimensions of the batteries, the aim of controlling the working voltage precision of the batteries cannot be achieved by increasing or decreasing the number of the single batteries, and the aim of controlling the working voltage precision of the batteries cannot be achieved by independently controlling all monovalent silver oxide generated by positive electrodes during formation of the single batteries.

Disclosure of Invention

The invention aims to provide a method for reducing the voltage high wave of a zinc-silver reserve battery so as to improve the working voltage of the zinc-silver reserve battery.

The method for reducing the voltage high wave of the zinc-silver reserve battery comprises a positive electrode of the zinc-silver reserve battery, silver powder and a metal net provided with a metal wire; the method is characterized in that: the silver powder is evenly coated on the metal net, the positive electrode and the metal net are pressed into a positive electrode pressing piece in a special positive electrode pressing piece die at proper pressure, and the prepared positive electrode is placed in high temperature for more than 8 hours.

The beneficial effect of this scheme: the invention is characterized in that the positive electrode tablet produced by the prior art is bundled and fastened by a metal mold and then is placed in high temperature for more than 8 hours, so that the active substance on the surface layer of the positive electrode is converted from bivalent silver oxide into monovalent silver oxide, and the chemical equationFormula (II): 4AgO → 2Ag₂O+O₂And ℃,. monovalent silver oxide has higher resistivity than divalent silver oxide, so the internal resistance of the battery is also higher, and the discharge working voltage is lower, thereby realizing the purpose of reducing the voltage high wave of the zinc-silver reserve battery. Compared with the prior art, the method has the obvious function of reducing the voltage high wave of the zinc-silver reserve battery, and the method is convenient to operate, simple and easy to implement. Through tests, the electrodes in the single battery in the prior art are subjected to high-temperature treatment, and the zero-second load voltage of the single battery is averagely reduced by 0.07V-0.10V. The voltage of the zinc-silver reserve battery produced by the invention is averagely 1.4V-2.0V lower than that of the zinc-silver reserve battery produced by the prior art, and the problem of high discharge voltage of the zinc-silver reserve battery is solved. The method has a remarkable effect of eliminating high waves for the battery with low working current density at the initial discharge stage, so that the working voltage precision of the zinc-silver reserve battery can meet the requirement, and the working reliability of the zinc-silver reserve battery can be improved.

And further comprising a zinc oxide negative electrode, wrapping the positive electrode pressing sheets one by using a diaphragm, overlapping the wrapped positive electrode pressing sheets and the zinc oxide negative electrode in a crossed manner, putting the overlapped positive and negative electrodes into a device for formation, adding electrolyte for formation charging, washing to be neutral after charging is finished, and drying to obtain the prepared positive and negative electrodes.

Further, the prepared positive electrode is bundled and fastened by a metal mold and is placed in an environment temperature of 180-220 ℃.

Further, it was left at the above temperature for 9 to 10 hours.

Drawings

FIG. 1 is a discharge curve of a battery I assembled by a positive electrode prepared by a method for reducing the voltage high wave of a zinc-silver reserve battery and a negative electrode produced in the prior art in a paired mode and a battery II assembled by the positive electrode and the negative electrode prepared in the prior art under the same working load condition.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments: