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Efficient rotary leakage current blocker and application thereof

A leakage current and rotating technology, which is applied in the field of high-efficiency rotating leakage current blockers, can solve the problems of stack leakage current and other problems, so as to facilitate installation and maintenance, eliminate leakage current, and improve Coulombic efficiency Effect

Active Publication Date: 2022-01-04
THE HONG KONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Generally speaking, none of the existing technologies can well solve the leakage current problem inside the stack

Method used

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  • Efficient rotary leakage current blocker and application thereof
  • Efficient rotary leakage current blocker and application thereof
  • Efficient rotary leakage current blocker and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as Figure 1-Figure 2 As shown, this embodiment is a specific manufacturing process for a rotary leakage current blocker, and the specific steps are as follows:

[0046] 1. Determine the size and shape of the rotary leakage current interrupter according to the size of the flow channel, and make the inner runner (12), the outer runner (10), the inner runner shaft (13), the outer runner shaft (14), The mold of the moon-shaped assembly (11), the housing (9), the inner runner shaft (13) and the moon-shaped assembly (11) are fixed on the outer runner shaft (14), and the mold of the housing (9) should be divided into upper and lower two halves for later installation.

[0047] 2. Take anti-corrosion insulating materials, such as: polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), polycarbonate (PC), etc.; preferably, its material It is PTFE, melted and casted in a mold, let it cool naturally, and then demolded, and the uneven...

Embodiment 2

[0050] Such as Figure 1-Figure 2 As shown, this embodiment is a specific manufacturing process for a rotary leakage current blocker, and the specific steps are as follows:

[0051] 1. Determine the size and shape of the rotary leakage current blocker according to the size of the flow channel, and establish the inner runner (12), outer runner (10), inner runner shaft (13), and outer runner shaft in the drawing software (14), three-dimensional runner model of moon-shaped assembly (11), housing (9).

[0052] 2. Use formed anti-corrosion insulating materials, such as: polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), polycarbonate (PC), etc.; preferably, Its material is PTFE. The laser cutting method is used to cut out the inner runner (12), the outer runner (10), the inner runner shaft (13), the outer runner shaft (14), the moon-shaped component (11), and the housing (9).

[0053] 3. The assembly method is the same as that in Exam...

Embodiment 3

[0055] The same method as in Example 1, except that step 2 uses 3D printing.

[0056] After installing the rotating leakage current blocker, the Coulombic efficiency can be increased from 93% to 97% of the conventional stack to 96% to 99%.

[0057] Such as image 3 As shown, the structure of the multi-stack fuel cell system and the equivalent circuit diagram in the stack, the circuit of the stack (17) is connected in series through wires (22), and finally connected to the power supply / load (21). The electrolyte is drawn out from the liquid storage tank (18) through the pump (20), and enters the electric stack (17) through the pipeline (19). For the interior of a single stack, since the electrolyte connects each battery to form a circuit, it can be equivalent to an equivalent circuit, which includes a single-cell voltage source (27), a positive main channel resistance (24), and a negative main channel resistance (25) , positive manifold resistance (23), negative manifold resi...

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Abstract

The invention relates to the technical field of flow batteries, in particular to an efficient rotary leakage current blocker and application thereof. According to the invention, the rotary leakage current interrupter is arranged on the main flow channel between the liquid inlet / outlet on the bipolar plate or the electrode frame of the flow battery and the reaction area, and the intermittent flow of the electrolyte in the main flow channel is realized by using the rotating wheel, so a leakage current network in a flow pile is blocked, and the leakage current of the flow pile is eliminated. According to the invention, only one rotary leakage current interrupter needs to be arranged on the bipolar plate of the flow battery or the main flow channel of the electrode frame, and the structures of other parts of the flow pile are not changed, so that the influence of leakage current can be basically eliminated, and the efficiency of the flow battery and the utilization rate of electrolyte are greatly improved. The method is simple and feasible, has obvious effect and is expected to be widely applied to the field of flow batteries.

Description

technical field [0001] The invention relates to the technical field of liquid flow batteries, in particular to a high-efficiency rotary leakage current blocker and its application. Background technique [0002] In recent years, with the development of renewable energy, the proportion of solar energy, wind energy and other new energy power generation in the national energy structure is increasing. However, the unstable nature of renewable energy itself has brought severe challenges to the stable and continuous power supply of new energy, and efficient large-scale energy storage technology is the key to solving this problem. Among them, as a new type of battery technology, flow batteries have attracted widespread attention due to their advantages of high efficiency, safety and reliability, long cycle life, and flexible structural design. Flow batteries are different from traditional secondary batteries. They store electrical energy in a flowing electrolyte, and store and rele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0258H01M8/04082H01M8/18H01M8/2465H01M8/2483
CPCH01M8/2465H01M8/2483H01M8/04201H01M8/0258H01M8/188Y02E60/50
Inventor 赵天寿任嘉友范新庄
Owner THE HONG KONG UNIV OF SCI & TECH