Solid-oxide fuel battery and manufacturing method thereof

Abstract

The invention relates to a solid oxide fuel battery and a preparation method thereof, belonging to the field of battery power technique. The solid oxide fuel battery comprises a battery core which is formed by the assembly of an oxide ceramic core and a metal connector; dual surfaces of the oxide ceramic core have metal articles; the interior of the oxide ceramic core is composed of an anode, an electrolyte and a cathode. The preparation method of the invention comprises the steps as follows: 1) electro-plating of metal article; anode metal, electrolyte metal and cathode metal are electro-plated on the metal article; 2) welding of metal article; after electro-plated, a layer of metal article is welded; 3) an oxide ceramic battery core naked part is prepared by micro-arc oxidation, and the anode metal, the electrolyte metal and the cathode metal are oxygenated so as to prepare the ceramic battery core naked part; 4) welding and assembling of the battery core; the oxide ceramic battery core naked part is welded with the metal connector so as to prepare the battery core; and 5) assembling of the battery; according to the sequence of anode and cathode, the battery core is sequentially welded and assembled as the solid oxide fuel battery. The solid oxide fuel battery has the advantages of simple process, convenient control, low cost, long service life, high efficiency, large power, small volume, etc.

Description

technical field [0001] The invention belongs to the technical field of battery power sources, and in particular relates to a solid oxide fuel cell and a manufacturing method thereof. Background technique [0002] At present, the flat-plate solid oxide fuel cell is assembled from battery cores and connectors, which has obvious technical defects: 1. The area size is too small; the thickness size is too large. This is because oxide ceramics are sintered, and the sintering process cannot sinter products with large area and thin thickness. Because it will deform and break the ceramic. 2. Low efficiency. Due to the large thickness, the electrical conductivity is low, the internal resistance is large, and the loss is large. 3. High temperature operation. Due to the large thickness, the operating temperature (800-1000°C) must be increased to overcome the internal resistance. In this way, due to the inconsistent temperature coefficient of each layer of material, it is easy to ca...

AI Technical Summary

Problems solved by technology

[0002] At present, the flat solid oxide fuel cell, the battery core group is assembled by the battery core and the connector, which has obvious technical defects: 1. The area size is too small; the thickness size is too large

This is because oxide ceramics are sintered, and the sintering process cannot sinter products with large area and thin thickness.

because it deforms and breaks the ceramic

2. Low efficiency

In this way, due to the inconsistent temperature coefficient of each layer of material, it is easy to cause breakage and air leakage.

4. Due to the high temperature, low-cost metal materials cannot be used for connectors, only conductive ceramics can be used

High cost, high connector impedance, and further reduction in efficiency

5. Due to the high temperature, the temperature coefficient of the connector and the battery core is inconsistent, resulting in false connection and increased internal resistance

In severe cases, the battery pack will be broken

6. Low power

Due to the small area size, it is not possible to manufacture high-power power supplies

7. The connector and the battery core are not a whole, they need to be fixed with bolts, because the middle part is too far away from the bolts, it is easy to form a gap, resulting in poor contact between the two, increasing the internal resistance and increasing the loss

If the tightening force is too large, the expansion at high temperature will break the battery pack, etc.

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