Stack-layered magnesium-air batteries

Abstract

The application relates to a stack-layered magnesium-air batteries, which is characterized in that a plurality of assembly units is connected in series or in parallel to form the stack layer structure, electrolyte is injected before using, the assembly unit comprises an isolation air feed plate, an air electrode, an isolation membrane, an anode; a plurality of units are repeatedly stacking ordered, winded integrally by a fastener, and assembled into a outer shell; liquid injection pores are disposed on the outer shell, an electrolyte storage slot is disposed on the bottom of the shell, wherein the liquid injection pore is also used as an air inlet pore; the anode is made form magnesium alloy; the electrolyte storage slot is pre-filled with water absorption material; the isolation membrane is made from water absorbing paper dried after water absorbing resin dipping; structure of the isolation air feed plate a hollow plate or a comb-shaped plate with sieve pores, which not only is used as the insulation between batteries, but also functions as a channel for delivering air from external space to the air electrode. The electrolyte needed for the batteries are inputted from the liquid injection pore, stored in the electrolyte storage slot, and distributed to each assembly unit by capillary action of the isolation membrane.

Description

technical field [0001] The invention relates to a metal-air battery, in particular to a dry storage magnesium-air battery pack. Background technique [0002] Metal (zinc, aluminum, magnesium, etc.)-air batteries are a type of batteries with high specific energy density and high stable discharge characteristics. Metal-air batteries have various structures. The most common structure is a box-type single-cell structure, that is, the air electrode and plastic form a box, and the electrolyte and metal electrodes are placed in the box to form a single battery that can be discharged independently. According to different purposes, several single cells are connected in series and parallel to form a battery pack. The air electrode (also known as positive electrode or cathode) is mainly composed of some polymers (such as polytetrafluoroethylene), activated carbon, catalysts (noble metal catalyst silver, perovskite oxides, metal organic chelates, MnO 2 etc.) and current collector mate...

AI Technical Summary

Problems solved by technology

For example, although the anode of the air battery can be replaced with a new one, it is troublesome to replace; the old anode is difficult to take out, and may even damage the battery when taking out the old anode; metal-air batteries are basically wet batteries, and the battery is troublesome to seal; the discharge product is on the surface of the cathode Adhesion by discharge products reduces the performance of the cathode; when a high-voltage battery pack is composed of independent box-type single cells, complicated wiring is required, which complicates assembly and use

The root cause of the above shortcomings is that the production cost of the air electrode is high and the air battery is mainly a mechanically charged secondary battery, which to a certain extent complicates the air battery pack and limits the application of the air battery

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