Integrated structure of electrode frame and bipolar plate, and application thereof
An integrated, bipolar plate technology, applied in circuits, fuel cells, electrical components, etc., can solve the problems of increasing the volume of the stack, the resistance of the flow channel should not be too large, and the volume of the stack should be reduced, so as to improve the reliability of operation. , the effect of reducing the volume and reducing the polarization
Pending Publication Date: 2021-06-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
[0004] In order to solve the contradiction between the ultra-thin electrode makes the volume of the stack significantly reduced and the resistance of the flow channel should not be too large, but will increase the volume of the stack
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[0024] image 3 and Figure 4 The integrated structure of the electrode frame and the bipolar plate proposed by the present invention has a thickness of 3.5 mm, 4 positive electrolyte inlets and 5 outlet distribution flow channels are provided on the front, and 6 negative electrode electrolyte inlets and 7 outlets are arranged on the back distribution channel. Wherein the flow direction of the positive electrode electrolyte in the electrode is perpendicular to the flow direction of the negative electrode electrolyte in the electrode. This structure makes full use of the part of the bipolar plate that is not provided with flow channels, and the flow channels are provided on the other side, and the space occupied by the thickness of the flow channels is saved through the offset arrangement of the flow channels. While achieving the same function, the thickness is reduced by about 60%. With this structure, the electrode thickness can be reduced to hundreds of microns.
[0025]...
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Abstract
The invention provides an integrated structure of an electrode frame and a bipolar plate. Grooves for accommodating electrodes are formed in the middles of the surfaces of the two sides of a flat plate. Anode or cathode electrolyte distribution runners communicated with the grooves are arranged on the upper and lower opposite sides of the surface of one side of the flat plate and the left and right opposite sides of the surface of the other side of the flat plate close to the middle groove. Four electrolyte through holes are formed in the positions, close to the edge, of the flat plate, two electrolyte through holes are communicated with the anode electrolyte distribution flow channel, and the other two electrolyte through holes are communicated with the cathode electrolyte distribution flow channel. By adopting the electrode frame and bipolar plate integrated structure and utilizing the staggered arrangement of the flow channels on the two sides of the flat plate, the integrated structure that the electrode frames are processed on the two sides of the bipolar plate is realized, and the problem that the thickness of a conventional integrated structure is relatively large is solved. The structure can significantly reduce the volume of the galvanic pile, and is particularly suitable for a high-power-density galvanic pile structure using an ultrathin electrode.
Description
technical field [0001] The invention relates to a liquid flow battery stack, in particular to an integrated structure of an electrode frame and a bipolar plate of the liquid flow battery stack. Background technique [0002] The rapid development of the country has rapidly increased the large demand for energy. Traditional fossil energy is becoming more and more difficult to meet the needs of development. Many countries have gradually increased the proportion of renewable energy in the energy structure. A large number of renewable energy sources such as wind energy and solar energy are connected to the grid, which can easily cause an impact on the grid and endanger the security of the grid in severe cases. Therefore, there is an urgent need for a buffer device to alleviate the problems caused by discontinuous and uncontrollable renewable energy. At the same time, the power grid side also needs a buffer device to adjust the fluctuation of the power grid to realize the functio...
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IPC IPC(8): H01M8/0258H01M8/04276H01M8/18H01M8/2455
CPCH01M8/0258H01M8/04276H01M8/188H01M8/2455Y02E60/50
Inventor 邢枫李先锋张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI