A liquid flow battery stack and its pressing method
A technology for flow battery stacks and battery stacks, which is applied to fuel cells, circuits, electrical components, etc., can solve problems such as liquid leakage and battery stack leakage, and achieve the effect of overcoming uneven pressure distribution.
Active Publication Date: 2017-08-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology
[0004] The purpose of the present invention is to provide a new type of liquid flow battery stack and its compaction method, change the sealing structure and compaction method of the existing liquid flow battery stack, so as to solve the phenomenon of liquid leakage and stringing of the battery stack, and at the same time realize the battery Simple and efficient assembly of heaps
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[0027] In a specific embodiment, the new flow battery stack of the present invention includes a plurality of current collectors, a plurality of electrodes, a plurality of flow frames, a plurality of diaphragms, and a plurality of reinforced steel plates. The battery stack includes a plurality of basic batteries. Unit, each basic unit adopts a combination of reinforced steel plate and liquid flow frame to clamp the liquid flow frame and diaphragm with bolts, and there are more than two fingers.
[0028] Among them, rectangular grooves are provided around the side of the flow channel of the liquid flow frame for placing reinforced steel plates. The depth of the groove is the same as the thickness of the reinforced steel plate. The reinforced steel plate adopts an alternating layout of large and small holes, and the liquid flow frame adopts large holes in the corresponding positions. A rectangular groove is provided outside the through hole of the reinforced steel plate, and the dep...
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Abstract
The invention relates to the field of flow cells, in particular to a novel flow cell stack and a pressing method thereof. The novel flow cell stack comprises a plurality of (two or more than two) current collectors, a plurality of electrodes, a plurality of flow frames, a plurality of membranes and a plurality of strengthening steel plates, and also comprises a plurality of cell elementary units, wherein each elementary unit adopts the structure that the flow frames and the membranes are clamped by bolts in a combined manner of the strengthening steel plates and the flow frames. The bolt assemblies penetrate through through-holes uniformly distributed in the strengthening steel plates to clamp and fix the flow frames and the membranes of the cell to form one elementary unit, and the whole cell stack is formed by superposing multiple elementary units. The method can be used for simply and conveniently assembling the cell stack, and meanwhile, the method can be used for effectively solving the problem of the leakage among the elementary units of the cell stack.
Description
Technical field [0001] The invention relates to the field of flow batteries, in particular to a new type of flow battery stack and a compression method thereof. Background technique [0002] In the prior art, the liquid flow frame, the current collector and the diaphragm in the battery stack are formed by multiple groups in series, and they are compressed together to achieve sealing by means of fasteners. This causes uneven pressure distribution between the single groups, which results in Serious hidden danger of leakage. At the same time, after long-term use, the liquid flow frame and the seal will undergo some deformation, causing partial or most liquid leakage. [0003] In addition, the current compression method of the battery stack is mostly manual tightening or hydraulic press, which has certain limitations. Manual tightening will cause uneven force during the compression process, internal dislocation, and hidden dangers of liquid leakage. However, the cost of pressing wit...
Claims
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IPC IPC(8): H01M8/248H01M8/247
CPCH01M8/247H01M8/2475H01M8/248H01M8/249Y02E60/50
Inventor 高海王绍亮范新庄张建国刘建国严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI