Abstract: Provided in the present disclosure is an all-vanadium redox flow battery system. A cathode electrolyte is stored in a cathode electrolyte storage tank of the system, a vanadium cathode active material being added in the cathode electrolyte, an anode electrolyte being stored in an anode electrolyte storage tank, a vanadium anode active material being added in the anode electrolyte, the cathode electrolyte storage tank including a flexible conductive material loaded with a Prussian blue analog, the proportion of oxygen-containing functional groups in the flexible conductive material being 30% to 50%, and a content of the Prussian blue analog in the cathode electrolyte storage tank being 4 g/L to 480 g/L. In the present disclosure, the Prussian blue analog is synthesized on a surface of the flexible conductive material by using an electrochemical deposition method, and synthesis efficiency is high.

Abstract: The present disclosure provides a bipolar plate and a current collector plate of a flow battery. The bipolar plate or the current collector plate includes a support layer, wherein the support layer includes a first surface in contact with an electrode and a second surface opposite thereto; the support layer is provided with holes passing through the first surface and the second surface; the holes are provided with a conductive filler therein; the first surface is provided with a first region and a second region, the first region surrounds all of the holes, and the second region is the remaining region of the first surface; the second surface is provided with a third region and a fourth region, the third region surrounds all of the holes, and the fourth region is the remaining region of the second surface; and the first region has a resistivity less than that of the second region.

Abstract: Provided are a flow battery cleaning apparatus, method, and system. A flow battery includes: a positive electrode liquid tank, a negative electrode liquid tank, and a stack unit, the positive electrode liquid tank and the stack unit forming a positive electrode circulation loop, and the negative electrode liquid tank and the stack unit forming a negative electrode circulation loop. The flow battery cleaning apparatus includes a detection apparatus, a first foreign matter removal apparatus, and a second foreign matter removal apparatus, and the detection apparatus includes a first detection apparatus. The first detection apparatus is configured to detect whether foreign matter is present in the stack unit, the first foreign matter removal apparatus is configured to adjust the pressure of the positive electrode circulation loop, and the second foreign matter removal apparatus is configured to adjust the pressure of the negative electrode circulation loop.

Abstract: Disclosed is an electrolyte storage tank, which comprises a tank body comprising an inner chamber, the tank body being provided with a liquid inlet and a liquid outlet which are in communication with the inner chamber, the tank body being formed of acid-resistant concrete by means of pouring, and the inner chamber of the tank body being configured to store an electrolyte.

Abstract: Embodiments of the present disclosure disclose an insulating protective mechanism, a conveying apparatus, and a flow battery energy storage system, which relate to, but are not limited to, insulating protection technology. The insulating protective mechanism comprises a frame, an insulating protective cover, a transmission assembly, a sensing assembly, and a control unit. The insulating protective cover is arranged on the frame, and can enclose with the frame an installation space for installing a conveying mechanism. The control unit controls the transmission assembly to facilitate driving the insulating protective cover to open or close the installation space, so as to facilitate maintenance and replacement of the conveying mechanism in the installation space, and reset the insulating protective cover after the maintenance and replacement of the conveying mechanism.

Abstract: Disclosed in the present utility model is a device for testing gas tightness of a bipolar plate. The device includes a fixing assembly and a liquid placing plate. The fixing assembly includes a base plate and a cover plate. The base plate and the cover plate are arranged opposite to each other, and a test space capable of accommodating a bipolar plate is formed between the base plate and the cover plate. The base plate or the cover plate is provided with a gas inlet for gas to enter the test space. The liquid placing plate is arranged in the test space and arranged to be stacked on the plate surface of the bipolar plate facing away from the gas inlet. The liquid placing plate is provided with a plurality of liquid placing recesses capable of containing liquid. The liquid placing recesses pass through opposite plate surfaces of the liquid placing plate.

Abstract: The present disclosure provides a bipolar plate for a flow battery and a flow battery. The flow battery comprises a first carbon felt, a second carbon felt, and a bipolar plate, and the bipolar plate is located between the first carbon felt and the second carbon felt. Surfaces of the bipolar plate in contact with the first carbon felt and the second carbon felt are provided with grooves, and the grooves are filled with an adhesive. Fibers extending out of the grooves are provided in the grooves. The technical solution provided in the present invention forms fiber layers on the flocked surfaces of the bipolar plate. The fiber layers serve as contact surfaces with the carbon felts, and can significantly increase the friction therebetween. After 5,000 cycles of charge and discharge in a stack, the carbon felts did not slip or shift. The fiber layers can further reduce the contact resistance between the carbon felts and the bipolar plate by 30% or more, and improve the energy efficiency of the stack by 3% to 5%.