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Metal air fuel cell based on magnetic control flow

A metal-air and fuel cell technology, applied in the direction of fuel cell half-cells and primary battery-type half-cells, can solve the problems of difficulty in ensuring electrolyte flow consistency, low battery power density and efficiency, and concentration polarization loss Large and other problems, to achieve the effect of improving energy conversion efficiency, simple devices, and reducing concentration polarization

Inactive Publication Date: 2016-12-07
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In small metal-air fuel cells, in order to reduce the weight of the system, there is generally no electrolyte drive device, the concentration polarization loss is large, and the power density and efficiency of the battery are low.
In a large metal-air fuel cell stack, the electrolyte drive device or ultrasonic dispersion device needs to consume a certain proportion of the generated power
In addition, in a large battery stack, it is difficult to ensure the flow consistency of the electrolyte in each battery and between the batteries, the work efficiency is low in the area where the flow is too slow, and the electrolyte flow that is too fast has a scouring effect on the electrode catalytic layer , will cause rapid degradation of battery performance

Method used

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  • Metal air fuel cell based on magnetic control flow
  • Metal air fuel cell based on magnetic control flow
  • Metal air fuel cell based on magnetic control flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, between the battery negative pole plate 1 and the battery negative pole plate 2 of a single battery, when the battery is in operation, a parallel electric field E is formed inside the battery from the negative pole plate 1 to the positive pole plate 2 . Two permanent magnets (or other magnetic materials) 3 and 4 are added on both sides of the battery, and a parallel magnetic field B is formed between the permanent magnet 3 and the permanent magnet 4 . Therefore, after adding two permanent magnets, electric and magnetic fields perpendicular to each other are formed inside the battery.

[0038] Such as figure 2 As shown, during the working process of the battery, metal cations (Mn+) 5 are generated on the surface of the negative electrode plate 1, and hydroxide ions (OH-) 6 are generated on the surface of the positive electrode plate 2. The metal cations 5 are driven by the electric field force and the concentration gradient to move towards t...

Embodiment 2

[0040] Such as image 3 As shown, a battery stack composed of a series of single-cell batteries 15 in series, the left side of the battery stack in the figure is the battery stack negative pole 13, the right side of the battery stack is the battery stack positive pole 14, and the direction perpendicular to the connection line between the battery stack negative pole 13 and the positive pole 14 Add two permanent magnets 3 and 4 to the two sides of the face. Utilizing the MHD drive technology in Embodiment 1, the electrolyte in the electrolyte tank 10 can be circulated and supplied to the entire battery stack.

Embodiment 3

[0042] Such as figure 1 Add permanent magnets 3 and 4 on both sides of the battery as shown. Such as Figure 4 As shown, the electrolyte of the single-cell battery is driven by an electric pump 11, and the flow is regulated by a valve 12, and the electrolyte forms a top-down flow inside the battery. The metal cations 5 in the electrolyte in the battery move to the right under the action of the Lorentz force of the external magnetic field, accelerating the metal cations 5 away from the negative electrode plate 1; the hydroxide ions 6 move to the left under the action of the Lorentz force of the external magnetic field movement, accelerating the hydroxide ions 6 away from the positive plate 2. The driving effect of the external magnetic field on the ions can accelerate the reaction product away from the electrode surface, thereby reducing the concentration of the reaction product on the electrode surface and reducing the concentration polarization loss, thereby improving the w...

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Abstract

The invention discloses a metal air fuel cell based on magnetic control flow. The metal air fuel cell comprises a metal air fuel cell and two additional permanent magnets, wherein an electric field is generated between a positive electrode plate and a negative electrode plate; a magnetic field is generated between the two magnets; under the action of the electric field and the magnetic field perpendicular to each other, ions in electrolyte in the cell move under the action of electric field force and Lorentz force; ions drive the electrolyte to move under the hydration of the ions and the viscosity of the electrolyte, so as to form the directional flow of the electrolyte or accelerate a reaction product to move away from the electrode surface. The metal air fuel cell provided by the invention can reduce an electric pump powder or eliminate an electric pump, enhance a mass transfer effect of the electrolyte, improve the flow consistency of the electrolyte and weaken the scouring of the electrolyte to an electrode catalysis layer on the basis of the magnetic flow control technology, thereby improving the working efficiency and reliability of the cell.

Description

technical field [0001] The invention relates to a metal-air fuel cell, in particular to a metal-air cell that drives an electrolyte with a magneto-controlled current technology. Background technique [0002] With the advancement of science and technology and the improvement of people's living standards, human activities have an increasing demand for energy, especially the rapid development of electric vehicles has posed a huge demand and challenge for batteries. Lithium-ion batteries and proton exchange membrane fuel cells are currently the two major routes for the development of electric vehicles, but lithium battery vehicles have shortcomings such as short cruising range and long charging time, proton exchange membrane fuel cells have difficulties in hydrogen storage and carrying, and lack of hydrogen refueling stations. Its popularization and application also faces relatively large technical problems. [0003] In recent years, the development of metal-air fuel cells (or ...

Claims

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Application Information

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IPC IPC(8): H01M12/06
CPCH01M12/06
Inventor 马泽
Owner BEIJING MECHANICAL EQUIP INST