Fuel cell capable of refilling metal fuels

Abstract

The invention provides a fuel cell capable of refilling metal fuels. The fuel cell comprises a cell box and a cell assembly, wherein the cell assembly is positioned inside the cell box; the cell assembly comprises an electrolyte, a metal electrode, an air electrode and a membrane, the metal electrode, the air electrode and the membrane are soaked into the electrolyte, the metal electrode comprisesa metal net and an aluminum material placed inside the metal net, the air electrode is arranged on at least one side of the inner wall of the cell box, and the membrane is positioned between the metal electrode and the air electrode. According to the fuel cell provided by the invention, electrode materials can be filled according to using conditions, the inconvenience that the cooperation of multiple persons is needed when a traditional aluminum-air cell electrode material is changed is avoided, simultaneously, the cell is compact in structure and smart in design, the air electrode clings tothe inner wall of the box, the space is saved, and the volume of the cell is reduced.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a fuel cell which can be supplemented with metal fuel. Background technique [0002] Batteries are one of the most commonly used items in life. At present, lead-acid batteries and lithium batteries are commonly used. Lithium batteries have large capacity, high energy density and no memory effect, but the cost is high and battery management is more complicated; lead-acid batteries are low in cost. , but the energy density is low, the weight is large, there is a memory effect, it requires certain maintenance and has a short life, and it is also prone to pollution. The theoretical specific energy of aluminum-air fuel cells can reach 8100Wh / kg, and it has the advantages of low cost, high specific energy density and specific power density. As a special fuel cell, aluminum-air batteries are used in military, civil, and underwater power systems. It has huge commercial potential in ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the electrolyte in the existing metal-air battery uses alkaline solution and the existing power is not large enough, and the use and maintenance are troublesome, CN101090168 discloses a salt water battery. The salt water battery of the invention includes a shell, an electrolyte , a metal electrode and an air electrode, which have one or more windows on the shell, the air electrode is mounted on the window and forms a container for containing the electrolyte together with the shell, and the metal electrode is a magnesium alloy or a magnesium-aluminum alloy Electrode, the electrolyte is a neutral electrolyte, such as sodium chloride solution and sea water, etc., the air electrode consists of a silver-plated conductive copper wire mesh, an oxophilic material layer attached to both sides of the copper wire mesh, and attached to the inner side. Composed of a waterproof and breathable membrane on the oxophilic material layer, the salt water battery has a long power supply duration and high efficiency, and can use neutral electrolytes such as ordinary salt water and sea water, so it is easy to use and maintain, and will not cause pollution. However, the water battery aluminum Plates are prone to failure, and the cost of conductive copper mesh is high, and the output power of the battery is not ideal, which affects the practicability

CN2377685 discloses a salt water battery between the primary battery and the accumulator. This battery does not need charging equipment, and the electrolyte produced does not pollute the environment and can be stored for a long time in a dry environment. Compared with the accumulator, the Salt water batteries are small in size, light in weight, non-corrosive, and have a long service life. You only need to replace the anode plate. Compared with dry batteries, the cost is reduced by 70%. When there is no power supply, it can drive small electrical appliances below 6W. However The cathode plate of the salt water battery is made of conductive graphite, and the aluminum anode plate is made of metal magnesium, which is expensive and the electric power of the battery is low

[0004] The existing aluminum-air battery is essentially a chemical reaction device that releases electrical energy. It cannot be recharged repeatedly. It needs to replace the aluminum electrodes to continue working. However, in actual work, the replacement of aluminum electrodes usually requires the cooperation of multiple people to complete, which is time-consuming and laborious.

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