A metal-air battery

Abstract

The invention relates to a metal air battery taking a metal fuel roll as the fuel, and belongs to the technical field of the battery. By virtue of the metal air battery, convenient replacement of a positive electrode is realized and it is ensured that the area and the thickness of the positive electrode which participates in a reaction are unchanged, thereby improving the utilization rate of the positive electrode and improving the discharging stability of the metal air battery. The metal air battery comprises at least one electrolyte tank, an air electrode and at least one rotatable metal fuel roll; one side of the air electrode is in contact with oxygen while the other side is in contact with the electrolyte in the electrolyte tank; the metal fuel roll is formed by a metal band through winding; and the metal band is used as the fuel of the metal air battery. The metal air battery provided by the invention can be used for discharging.

Description

technical field [0001] The invention relates to a battery, in particular to a metal-air battery using metal fuel coils as fuel. Background technique [0002] Metal-air battery (or metal-air fuel cell) is a new type of battery that uses active metals such as Al, Mg, and Zn to perform electrochemical reactions with oxygen, thereby directly converting chemical energy into electrical energy output. Since active metals such as Al, Mg, and Zn have high energy density, they are convenient and safe to store and carry. They can be used as a fuel and added to the battery continuously or intermittently to maintain the continuous discharge of the battery. Therefore, metal-air batteries are widely used in various occasions such as individual power supplies, backup power supplies, and electric vehicles. [0003] In the prior art, metal-air batteries generally adopt a replaceable anode structure, that is, the anode (for example, a metal plate or an anode box made of metal, electrolyte, or...

AI Technical Summary

Problems solved by technology

However, this can be a tedious process for large battery stacks with many cells

Moreover, when the anode is taken out, there is a problem of electrolyte dripping everywhere, which is not conducive to the cleaning of the battery

[0004] In addition, during the working process of the battery, the anode is consumed as the reaction proceeds, so that its thickness and area gradually decrease, which makes it easy for the metal plate or anode box to drop slag.

Moreover, the thickness of the anode is reduced, so that the distance between the anode and the air electrode increases, and the area of ​​the anode decreases, so that the effective working area of ​​the battery is reduced, which will cause the performance of the battery to decline.

[0005] Finally, during the battery parking process, the anode is always immersed in the electrolyte, which will cause self-corrosion reaction, resulting in a decrease in the utilization rate of the anode

Images