Alkaline zinc-manganese battery

Abstract

The utility model provides an alkaline zinc-manganese battery which comprises a battery steel shell, a cathode current collector assembly is assembled at the upper end of the battery steel shell, an anode ring is coaxially embedded in the battery steel shell, an isolation tube is sleeved in a central cavity of the anode ring, and cathode zinc paste is filled in the isolation tube; an annular closed cavity is defined by the top surface of the positive electrode ring, the bottom surface of the negative electrode current collector assembly, the outer circumferential surface of the isolation tube and the inner circumferential surface of the battery steel shell, a hydrogen storage piece is embedded in the closed cavity, and the hydrogen storage piece is formed by pressing a hydrogen storage material. According to the alkaline zinc-manganese battery disclosed by the utility model, hydrogen generated in the battery can be transferred and stored in the hydrogen storage material in time, so that air pressure change in the battery caused by hydrogen evolution in the battery and side effects caused by the air pressure change are prevented.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and more particularly to an alkaline zinc-manganese battery. Background Technology

[0002] The negative electrode reaction of an alkaline zinc-manganese battery is the oxidation of zinc: Zn + 2OH- − →ZnO + H₂O + 2e⁻; The positive electrode reaction is the reduction of manganese dioxide: 2MnO₂ + 2H₂O + 2e⁻ − →2MnOOH+2OH − The overall reaction does not involve the production of hydrogen gas, and the electrolyte (KOH) only participates in the reaction as an ionic conductor. However, when the negative electrode contains impurities, the battery is over-discharged, or there is high temperature or damage, side reactions will occur inside the battery, producing hydrogen gas. The accumulation of hydrogen gas inside the sealed battery leads to increased pressure, disrupting the internal chemical balance and reducing discharge efficiency. Furthermore, excessive hydrogen accumulation can cause the battery casing to bulge, and in extreme cases, even rupture (especially in high-temperature or confined environments), posing a safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide an alkaline zinc-manganese battery that can transfer and store hydrogen generated inside the battery, avoiding the changes in internal gas pressure caused by hydrogen and the resulting side effects.

[0004] The technical solution to achieve the purpose of this utility model is: an alkaline zinc-manganese battery, including a battery steel shell, a negative electrode current collector assembly assembled at the upper end of the battery steel shell, a positive electrode ring coaxially embedded inside the battery steel shell, an isolation tube fitted inside the central cavity of the positive electrode ring, and negative electrode zinc paste filled inside the isolation tube; a ring-shaped sealed cavity is formed between the top surface of the positive electrode ring, the bottom surface of the negative electrode current collector assembly, the outer peripheral surface of the isolation tube, and the inner peripheral surface of the battery steel shell, and a hydrogen storage component is embedded in the sealed cavity, the hydrogen storage component being formed by pressing hydrogen storage material.

[0005] This invention utilizes the internal unused space of an alkaline zinc-manganese battery—a ring-shaped sealed cavity formed by the top surface of the positive electrode ring, the bottom surface of the negative electrode current collector assembly, the outer peripheral surface of the separator tube, and the inner peripheral surface of the battery steel shell. A hydrogen storage component, molded from a hydrogen storage material, is embedded within this cavity. The hydrogen storage material's physical adsorption or chemical reaction with hydrogen gas is used to promptly transfer and store the hydrogen generated inside the battery. This prevents internal hydrogen evolution, which can lead to changes in internal battery pressure and a series of side effects, such as reduced discharge efficiency and battery shell bulging and cracking.

[0006] Furthermore, the hydrogen storage element is a hydrogen storage ring, and the isolation tube is located on the central side of the hydrogen storage ring. In this case, the hydrogen storage element is arranged circumferentially around the isolation tube, which can achieve the effect of uniform hydrogen storage. Attached Figure Description

[0007] Figure 1 This is an axial cross-sectional view of an alkaline zinc-manganese battery according to an embodiment of the present invention.

[0008] Figure 2 This is a top view schematic diagram of the hydrogen storage component according to an embodiment of the present invention. Detailed Implementation

[0009] The preferred embodiment of the alkaline zinc-manganese battery of this utility model will be described in detail below with reference to the accompanying drawings.

[0010] Combination Figure 1 and Figure 2 An alkaline zinc-manganese battery includes a battery steel shell 10, a negative electrode current collector assembly 20 mounted on the upper end of the battery steel shell 10, a positive electrode ring 30 coaxially embedded inside the battery steel shell 10, an isolation tube 40 fitted inside the central cavity of the positive electrode ring 30, and negative electrode zinc paste 50 filled inside the isolation tube 40; an annular sealed cavity 60 is formed between the top surface of the positive electrode ring 30, the bottom surface of the negative electrode current collector assembly 20, the outer peripheral surface of the isolation tube 40, and the inner peripheral surface of the battery steel shell 10, and a hydrogen storage component 70 is embedded in the sealed cavity 60, the hydrogen storage component 70 being formed by pressing hydrogen storage material;

[0011] The hydrogen storage component 70 is a hydrogen storage ring, and the isolation tube 40 is located on the center side of the hydrogen storage ring.

[0012] This invention utilizes the unused internal space of an alkaline zinc-manganese battery (the annular sealed cavity 60) to embed a hydrogen storage component 70, which is formed by pressing hydrogen storage material. By leveraging the physical adsorption or chemical reaction of hydrogen by the storage material, hydrogen generated inside the battery is promptly transferred and stored within the material. This prevents hydrogen evolution inside the battery, which could lead to pressure changes and a series of side effects, such as reduced discharge efficiency and battery casing bulging and cracking. Furthermore, the hydrogen storage component is arranged circumferentially around the isolation tube, ensuring uniform hydrogen storage.

[0013] In specific implementations, the hydrogen storage material can be LaNi5, Mg2Ni, NaAlH4, LiAlH4, porous materials, etc. Metal hydrides such as LaNi5, Mg2Ni, NaAlH4, and LiAlH4 can chemically react to dissociate hydrogen molecules into hydrogen atoms, which then enter the interstitial spaces of the metal lattice to form hydrides. Porous materials (such as activated carbon, metal-organic frameworks, covalent organic frameworks, carbon nanotubes, etc.) use physical adsorption, allowing hydrogen molecules to be adsorbed onto the material surface or within the pores through van der Waals forces, without involving the formation of chemical bonds.

[0014] Of course, the shape of the hydrogen storage element 70 of this utility model may be, but is not limited to, the ring shape (hydrogen storage ring) shown in the figure, and may be any common shape.

[0015] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent process transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An alkaline zinc-manganese battery, comprising a battery steel casing, a negative electrode current collector assembly mounted on the upper end of the battery steel casing, a positive electrode ring coaxially embedded inside the battery steel casing, an isolation tube fitted inside the central cavity of the positive electrode ring, and negative electrode zinc paste filled inside the isolation tube; a ring-shaped sealed cavity is formed between the top surface of the positive electrode ring, the bottom surface of the negative electrode current collector assembly, the outer peripheral surface of the isolation tube, and the inner peripheral surface of the battery steel casing; characterized in that: A hydrogen storage component is embedded in the sealed cavity, and the hydrogen storage component is formed by pressing hydrogen storage material.

2. The alkaline zinc-manganese battery according to claim 1, characterized in that: The hydrogen storage device is a hydrogen storage ring, and the isolation tube is located on the center side of the hydrogen storage ring.

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