Liquid flow battery unit, battery stack and manufacturing method thereof

Abstract

The invention disclose a liquid flow battery unit which comprises a first battery box and a second battery box, an ion exchange membrane, a first porous electrode and a second porous electrode, and a first electrode plate and a second electrode plate, wherein a first side of the first battery box and a first side of the second battery box are combined with each other through bonding by heating, and the first side of the first battery box is provided with an annular protrusion edge; the ion exchange membrane is fixed in the protrusion edge; the first porous electrode and the second porous electrode at both sides of the ion exchange membrane are respectively arranged in the first battery box and the second battery box; The first plate electrode and the second plate electrode at a second side of the ion exchange membrane are respectively arranged in the first battery box and the second battery box, and respectively in contact with the first porous electrode and the second porous electrode. The invention also provides a battery stack comprising the liquid flow battery unit, and a manufacturing method of the liquid flow battery unit and the battery stack.

Description

technical field [0001] The present invention relates to a liquid flow battery, in particular, the present invention relates to a liquid flow battery unit, an electric stack composed of such a liquid flow battery unit, and a method for manufacturing the liquid flow battery unit and the electric stack Background technique [0002] At present, with the intensification of energy shortage and environmental degradation, as an energy storage device, flow batteries have been widely used due to their long life, high reliability, and low operation and maintenance costs. In particular, an all-vanadium redox flow battery has been developed, which does not cause cross-contamination of positive and negative electrolytes, and vanadium ions are more suitable for high-current fast charging and discharging. Furthermore, the all-vanadium redox flow battery can be completely sealed and has little impact on the environment. [0003] In all-vanadium redox flow batteries, the standard open circui...

AI Technical Summary

Problems solved by technology

In this assembly method, due to the poor machining accuracy of the electrode frame, uneven pressure during pressing, displacement of the sealing strip, or wrinkles on the ion exchange membrane, et

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