Metal air battery, battery pack and device applying the same

Abstract

Relating to the chemical battery field, in particular to a metal air battery that has multiple battery core units in series or parallel connection, can be stored for a long time before use, and can enable air positive layers of the battery core units to suck in an electrolyte aqueous solution during electricity generation, the invention discloses a metal air battery, a battery pack and a device applying the same. The metal air battery comprises an instrument type box, and symmetrical slots, battery core units, elastic components, an electrolyte aqueous solution, and inter-battery core unit series or parallel connection wires that are arranged in the instrument type box. The whole structure is simple, the battery core units can be inserted and taken out at any time, are convenient for centralized management and maintenance, can be easily expanded and integrated into a fixed or mobile generator room or power generation system, the battery chemical reaction is uniform and continuous, andthe electric energy production is constant. The volume expansion of the inter-battery core unit reaction product has no mutual interference and can automatically give way elastically, thus being convenient to recover the reaction product, and having no influence on the suction volume of secondary added water or electrolyte aqueous solution, and the operation is convenient during secondary replacement of metal negative electrodes.

Description

Technical field [0001] The invention relates to the technical field of a chemical battery that converts chemical energy into electrical energy, in particular to a metal-air battery, a battery pack and a device using the same. Background technique [0002] Metal-air batteries use active metals such as magnesium, zinc, aluminum, and beryllium or their alloy materials as the negative electrode, oxygen in the air as the positive electrode, and salt water, sea water, sodium hydroxide, and potassium hydroxide aqueous solutions as the electrolyte solution. A chemical battery that converts chemical energy into electrical energy. Active metal or its alloy undergoes oxidation-reduction reaction with water in the electrolyte aqueous solution under the catalytic action of porous activated carbon adsorbing a large amount of oxygen in the air, and the active metal or its alloy is oxidized and decomposed into hydroxide Or oxide, continuously outputting electric energy. [0003] Metal-air batteri...

AI Technical Summary

Problems solved by technology

[0005] However, the stacking methods of the above-mentioned magnesium metal-air batteries mostly adopt the structure of tightly wrapped or vertically tightly inserted into the shell cavity, which has the following disadvantages: limited structure, inconvenient expansion, integration, and centralized management And maintenance, the volume expansion of non-reaction products makes way for space. When the volume of reaction products expands, the porous activated carbon layer and the water-absorbing layer are strongly squeezed, forcing the porous activated carbon to reduce the air gap, and even unable to absorb oxygen in the air. When the water volume decreases, think twice When adding water or an aqueous electrolyte solution for the first time, the water-absorbing layer cannot absorb water or an aqueous electrolyte solution. Therefore, the power generation of the magnesium metal-air battery is reduced halfway, and even the power generation of the metal negative electrode is not exhausted.

Due to the effect of gravity on the vertically closely inserted battery core units, the electrolyte aqueous solution in the battery core is unevenly distributed, there is a phenomenon of less up and down, and the battery chemical reaction is uneven

When the metal negative electrode in the battery is exhausted and you want to replace the metal negative electrode for the second time, it is difficult to take out the battery cell unit because the volume of the reaction product expands. Even if the battery cell unit can be taken out, other parts may not be usable. The series and parallel stacking structure of the battery cells of the magnesium metal-air battery is inconvenient to repair and replace the metal negative electrode multiple times, so that the entire metal-air battery is discarded and causes waste

In addition, since the magnesium metal-air battery with multiple battery cells stacked in series needs to make the positive and negative electrodes closely bonded, however, due to the presence of an aqueous electrolyte solution, it is also easy to form a reverse battery or contact at the tightly bonded positive and negative electrodes. Bad, reduce the voltage and current at both ends of the magnesium metal-air battery that originally stacked multiple battery cells in series

Images