RU170026U1 - Oxygen - zinc battery cell - Google Patents

Abstract

The proposed utility model relates to electrical engineering, specifically to oxygen-zinc current sources. The zinc-oxygen battery cell consists of a rectangular case, in the upper part of which there is a filling hole with a plug, a gas diffusion cathode ending in a positive terminal, a zinc anode ending in negative terminal and alkaline electrolyte, gas diffusion cathode forms one of the main walls of the rectangular casing and, in addition to the oxygen-zinc current source, I am waiting for the gas diffusion cathode and zinc anode to introduce a porous metal plate coated with a layer of nickel. Also, filling holes for active mass located above and below are additionally introduced into the element. The gas diffusion cathode is made on the basis of a metal grid, activated carbon with fillers. The metal grid allows galvanic contact with a positive terminal. Before operating the current source, the housing is filled with electrolyte and active mass. The gas diffusion cathode has pores through which air enters the housing. The electrolyte does not seep through the pores. The technical effect achieved is the possibility of charging the oxygen-zinc element both with the help of an external electric current and mechanically.

Description

The proposed utility model relates to electrical engineering, specifically to oxygen-zinc current sources.

The essence of the utility model is that in an oxygen-zinc current source containing a rectangular case, in the upper part of which there is a filling hole with a plug, a gas diffusion cathode ending in a positive terminal, a zinc anode ending in a negative terminal and an alkaline electrolyte, the gas diffusion cathode forms one from the main walls of the rectangular case and into the composition of the oxygen-zinc current source, holes for refueling with the active mass are additionally located - one hole is located in the upper part of the housing, the second in the lower part of the housing between the gas diffusion cathode and the zinc anode introduced a porous metal plate coated with a layer of nickel. In the particular case, the gas diffusion cathode is made on the basis of a metal mesh.

The positive effect is the possibility of a full recharge of the oxygen-zinc current source, both by electric current and by replacing the active mass, consists of powdered zinc.

The proposed utility model relates to electrical engineering, specifically to oxygen-zinc current sources.

A primary air-zinc current source is known, comprising a housing, two flat parallel cathodes installed in the housing, a sacrificial anode located between the cathodes, made in the form of a flat plate, anode current collector having one or more contact pads, and a spring element [1]. The current collector of the anode is located in the inner cavity of the housing parallel to the surfaces of the cathodes, its contact pads are directed towards the anode and rigidly fixed in the housing, the anode is pressed with its spring plane, rigidly connected to the housing, to the contact pads of the current collector of the anode.

The disadvantage of this device is that after the discharge, a worn zinc anode is replaced.

Closest to the claimed utility model is an air-zinc current source containing a rectangular casing with a lid, on the outer surface of which there are positive and negative terminals of the current source and in which a filling hole is placed, closed by a plug, one or more gas diffusion cathodes are placed inside the casing, electrically connected to the positive terminal of the current source, gas chambers with a system of "breathing" holes, the anode made in the form of several flat porous briquettes of zinc powder connected in parallel with each other and with a negative terminal of the current source, and an interelectrode separator made of porous dielectric material, while the main planes of the briquettes are installed in the housing perpendicular to the surfaces of the gas diffusion cathodes [2]. The disadvantage of the prototype device is the inability to recharge it.

The task to which the proposed solution is directed is to create the possibility of recharging the current source with an external electric current and mechanically. The external charge in the prototype does not lead to positive results due to the fact that the zinc recovered during the charge of the oxygen-zinc source is a branched heterogeneous structure consisting of a large number of dendrites that interfere with the normal charge of the current source.

The solution to this problem is achieved by the fact that in the oxygen-zinc current source containing a rectangular housing, in the upper part of which there is a filling hole with a plug, a gas diffusion cathode ending in a positive terminal, a zinc anode ending in a negative terminal and an alkaline electrolyte, the gas diffusion cathode forms one of the main walls of the rectangular casing and the composition of the oxygen-zinc current source in addition between the gas diffusion cathode and the zinc anode introduced porous the metallic plate coated with a layer of nickel. Also, filling holes for active mass located above and below are additionally introduced into the element. The gas diffusion cathode is made on the basis of a metal grid, activated carbon with fillers. The metal mesh allows galvanic contact with a positive terminal.

Before operating the current source, the housing is filled with electrolyte and active mass. The gas diffusion cathode has pores through which air enters the housing. The electrolyte does not leak through the pores.

The design of the proposed oxygen-zinc current source is shown in the drawing. It contains a rectangular housing 1, a gas diffusion cathode 2, a zinc anode 3, a porous metal plate 4, an alkaline electrolyte 5, a positive terminal 6, a negative terminal 7, plugs 8, 9 filling holes for the active mass, 10 a hole for filling the electrolyte, 11 a semi-permeable membrane 12 active mass.

The porous metal plate 4, coated with a layer of nickel, allows you to limit the growth of dendrites when charging a current source. When zinc dendrites come in contact with plate 4, they form a galvanic pair, and zinc dendrite begins to be etched. Thus, the growth of dendrites is limited.

Experimental studies of the layout of the proposed current source confirmed the possibility of recharging it with electric current. The layout withstood 100 charge-discharge cycles.

Sources of information used in compiling the description of the utility model:

1. Pat. RF №2106725, IPC: Н01М 12/06, Н01М 2/26. Oxygen (Air) - metal mechanically rechargeable chemical current source // Belikov S.K. (RU), Zhukov R.V., Kulakov E.B., Sevruk S.D., Chersky O.M. 09/30/1996, publ. 03/10/1998.

2. Pat. RF №128783, IPC: Н01М 10/28. Oxygen-zinc chemical current source // Shkarupo S.P. (RU) - Decl. 11/07/2012, publ. 05/27/2013.

3. Pat. RF №2349991, IPC: Н01М 6/08, Н01М 6/32. Air-zinc element large // Bychkovsky S.K. (RU), Bakharev S.A (RU), Nikiforov V.I. (RU) - Decl. 02/08/2008, publ. 03/20/2009 - a prototype.

Claims (1)

An oxygen-zinc current source containing a rectangular housing, in the upper part of which there is a filling hole with a plug, a gas diffusion cathode ending with a positive terminal, a zinc anode ending with a negative terminal, and an alkaline electrolyte, characterized in that holes for filling the cell are additionally introduced into the structure active mass, which is used as powdered zinc.

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