WO2013102387A1

WO2013102387A1 - Pressing mechanism for assembling redox flow battery

Info

Publication number: WO2013102387A1
Application number: PCT/CN2012/085360
Authority: WO
Inventors: 崔骥; 罗臬; 杨立章
Original assignee: Cui Ji; Luo Nie
Priority date: 2012-01-04
Filing date: 2012-11-27
Publication date: 2013-07-11

Abstract

Provided is a pressing mechanism for assembling a redox flow battery, capable of solving the problem caused by bolt pressing in the prior art. The technical solution of the present invention is: a pressing mechanism for assembling the redox flow battery, comprising a base, multiple units of battery plates and an enclosing frame; the enclosing frame is disposed on the base; the multiple units of battery plates are disposed in the enclosing frame; the ends of the multiple units of battery plates are provided with end plates; the end plates are pressed by at least one jack disposed on the enclosing frame, so that the multiple units of battery plates are fixed. The technical solution of the present invention overcomes the deficiency of existing battery packs assembled in a bolt connection mode, and designs a simple jack-pressing assembly mode; the pressing mechanism has uniform pressure, good sealing effect, simple operation and easy component replacement, and more importantly, can enlarge the area of the battery plates to be larger than 0.5m² or 3m² or even larger, thus effectively improving the total energy density and power of the battery.

Description

Pressing mechanism for redox flow battery assembly

Technical field

The present invention relates to an energy storage device for directly converting chemical energy from electrical energy, particularly for assembly and compaction of large or larger oxidized reduction flow battery panels.

Background technique

The redox flow battery is composed of an anode chamber and a cathode chamber separated by an ion membrane. Positive and negative active electrolytes are respectively flowed in the cavity of the battery chamber, and the anode and the catholyte storage tank are respectively connected to form a closed Circulatory system. Realize the direct conversion between chemical energy and electrical energy.

FIG. 1-1 and FIG. 1-2 are one of the prior art solutions. As can be seen from the figure, the conductive separator 6 is divided into the front and rear two electro-hydraulic chambers in the middle of the unit cell panel 1. 5. The two electrolytes flow from the lower inlet port 7, flow through the electro-hydraulic chamber, and flow out from the upper outlet port 2. The ion membrane 4 is pressed between the two unit panels, and the two electrolytes perform an ion reaction between the ion membranes to convert the electrical energy into chemical energy. This reaction is reversible, disconnecting the external power source, and the two electrolytes can also react in the stack to convert chemical energy into electrical energy. Therefore, it can be seen that there are 22 bolt holes in the figure. This structure can only be applied to a small liquid stack with a cell board of less than 0.5 m ² . If it is used in a large power reactor, it is not only troublesome, but more important. It is difficult to ensure that the electric fluid does not leak.

It can be seen that the existing battery panel area is small, and the general area is less than 0.5 m ² . Because of the small circumference, dozens of batteries are combined and pressed by a plurality of long bolts or studs. It is still available. It is also possible to use a screw on the side of the frame assembled by the flow battery, for example, the utility model of the Chinese Patent No.: 03276099.

However, when the panel area is greater than 0.5 m ² , the circumference is large, and several bolts are used to combine and compact dozens of batteries, which tends to increase the bolt spacing, or must be pressed with more bolt connectors. , such a structure will lead to the following shortcomings:

1. The bolt spacing is increased or more bolts are used to press the stack plate. It is difficult to ensure uniform pressing force on the plate, which may cause partial bolt pressing force to fail and corrosive electrolyte leakage.

2. The bolts pass through the electrode plates. All the components (electrode plates, diaphragms) of the battery need to be widened to form a large volume and waste material.

3. The structure is complicated, the process is cumbersome, and the assembly is troublesome. The battery pack is inconvenient to install and disassemble.

4. The top of the frame is topped with 10 threads. It is also difficult to ensure uniformity of the pressing force of the plate. It is very likely that some of the bolt pressing force will fail and the electrolyte leaks.

5. The problem of uneven multi-bolt tension and multi-thread top pressure unevenness and leakage problem limit the area of the panel and limit the total energy density and power of the battery.

Summary of the invention The present invention provides a pressing mechanism for redox flow battery assembly which solves the problems associated with the prior art using bolt compression.

In order to overcome the shortage of the battery by the way of bolt connection, the invention designs a simple top pressure assembly method, which has uniform pressure, good sealing effect, simple operation and convenient replacement of various components. More importantly, the area of the panel can be made larger, not only can the area of the panel be greater than 0.5 m ² , but also can be made 3 m ² or larger, which can effectively increase the total energy density of the battery and power.

In order to solve the above technical problem, the technical solution of the present invention is a pressing mechanism for assembling a redox flow battery, comprising a base, a plurality of unit panels, and a shroud, wherein the shroud is disposed at a plurality of the unit battery panels are disposed in the bracket, and an end plate is disposed at an end of the plurality of unit battery panels, and at least one jack pressure is disposed on the bracket The end plate is tightly pressed, and a plurality of the unit battery plates are pressed and fixed.

In the technical solution of the present invention, the following technical features are also included: the bracket is composed of a longitudinal beam on both sides and at least two beams disposed on the longitudinal beam, the longitudinal beam is disposed on the machine The jack is disposed on the beam.

In the technical solution of the present invention, the technical feature is as follows: The top end of the jack is connected with a top frame, and the jack is pressed on the end plate by the top frame.

In the technical solution of the present invention, the following technical features are also provided: a plurality of brackets are arranged on the side members of the two sides, and the inner faces of the plurality of brackets abut against the end faces of the unit battery panels.

In the technical solution of the present invention, the following technical features are further provided: each of the longitudinal beams is provided with a plurality of longitudinal beam positioning holes, the beam can be moved along the longitudinal beam, and the beam is positioned by the longitudinal beam Hole positioning.

In the technical solution of the present invention, the following technical features are also provided: the pressing manner of the jack is pressed from one outer end, or the two outer ends are pressed, or the jack is placed at the intermediate outer end.

In the technical solution of the present invention, the following technical features are also provided: the jack is a hydraulic jack, or a screw jack, or a ratchet jack, or a connecting rod jack; the number is one, two or four.

In the technical solution of the present invention, the following technical features are also provided: a plurality of through holes are formed in the end plate.

The technical solution of the present invention is to arrange a battery stack formed by a plurality of liquid flow unit panels in a shroud, and to provide a rigid end plate at the end of the stack, and to be disposed at the end or the middle of the shroud The jack may be a hydraulic or mechanical jack, which may be one, two or four jacks, which press the end plate; it may be pressed from the outer end of one side, the two outer ends are pressed or the jack is pressed in the middle, Thereby, the compaction between the liquid flow panels is uniform and reliable.

The fastening method of the battery stack of the invention has the following advantages compared with the existing assembly method:

1. Enhance the sealing effect of the battery on the electrolyte.

2. The battery is easy to install and easy to maintain. 3. Reduce the area of each component of the battery and save materials.

4. Simplified the manufacturing process of the panel components.

5. The present invention enables the fabrication of a large-flow flow battery pack, thereby enabling compaction of a large flow battery cell panel having a peripheral area greater than 0.5 m ² to 6 m ² . It can effectively increase the total energy density and power density of the battery.

6. The position of the moving jack can be adjusted to adjust the number of panels at will, and the user can adjust the selection as needed.

DRAWINGS

Figure 1-1 and Figure 1-2 show the structure of a plurality of bolt-and-pressure combined liquid-flow redox batteries.

In the figure, 1, unit cell board, 2, electrolyte outlet, 3, bolt hole, 4, ion film, 5, electro-hydraulic chamber, 6, conductive separator, 7, electrolyte inlet, 8, battery stack.

2 is a structural view of a pressing mechanism for assembling a redox flow battery of the present invention.

In Figure 2, 1, jack beam, 2, hydraulic jack, 3, stringer, 4, longitudinal beam positioning hole, 5, top frame, 6, front end plate, 6-1, through hole, 7, positive electrode plate, 8, battery stack, 9, bracket, 10, electrolyte outflow hole, 11, unit cell board, 12, electro-hydraulic chamber, 13, ion film, 14, negative electrode plate, 15, rear end plate, 16, beam, 17, the base.

Figure 3-A, 3-B, and 3-C are schematic diagrams of the combination of the three pressing forces. The above three figures are the top view directions, and the hollow arrows in the figure 3 indicate the direction of the pressing force.

1, jack beam, 2, hydraulic jack, 3, stringer, 6, front end board, 6 end board, 11, unit battery board. detailed description:

Example 1

Referring to Fig. 2, the present embodiment is a larger flow battery stack having a cell length of 1. 2 x 1 m and an area of 1.2 m ² . A longitudinal beam 3 is disposed on both sides of the frame 17, and the longitudinal beam 3 is made of channel steel, the front end of the longitudinal beam 3 is provided with a jack beam 1, and the rear end is provided with a beam 16 to form a bracket. In the bracket formed by the longitudinal beam 3, the jack beam 1 and the beam 16, a plurality of unit battery panels 11 are disposed, and the assembled plurality of unit battery panels 11 form a battery stack 8, and the front end of the battery stack 8 has a positive electrode plate 7 The back end has a negative electrode plate 14. The rear end of the rear electrode plate 14 is a rear end plate 15, the front end of the positive electrode plate 7 is a front end plate 6, the hydraulic jack 2 is disposed on the jack cross member 1, and the top end of the jack 2 is provided with a top frame 5. The jack 2 is actuated to press the front end plate 6 at a time to press the entire battery stack 8. In order to regulate both sides of the front end plate 6, the rear end plate 15 and the battery stack 8, to avoid skewing, a plurality of brackets 9 are provided on the side members 3 on both sides, and the inner surface of the bracket 9 abuts against the front end plate 6 and a plurality of unit battery panels 11 are flanked so that the plurality of unit panel 11 are pressed at a prescribed appropriate position. The front and rear end plates 6, 15 are provided with a plurality of through holes, which save materials and reduce weight, but can ensure the specified strength. Each of the longitudinal beams 3 is provided with a plurality of longitudinal beam positioning holes 4, and the transverse beams 1 and 16 can be moved back and forth along the longitudinal beams 3, and the transverse beams 1 and 16 can be positioned by the longitudinal beam positioning holes 4.

According to the prior art, it can be seen that, according to the prior art structure of FIG. 1, each board has at least 60 bolt holes, more than 60 long bolts, and more than 120 nuts from both ends. Tightening, not only the process is troublesome, the maintenance is cumbersome, and more importantly, it is difficult to ensure that the electro-hydraulic does not leak.

In the first embodiment, a hydraulic jack having a pressure of 5 tons is placed in the jack beam 1 and the stack of 40 unit plates is pressed by the top frame 5 and the front end plate 6, and the stack of up to 3 m is assembled. The jack beam 1 can be moved back and forth in the positioning hole of the stringer to increase or decrease the number of adjustment unit panels.

When installing, the unit battery panel 11 is placed in the frame formed by the longitudinal beam and the beam, and the hydraulic jack 2 is actuated to be pressed at one time. When repairing, just loosen the jack 2 and directly lift the unit battery board 11 that needs to be repaired. After maintenance, directly hoist and insert the appropriate part to start the hydraulic jack. 2 The installation is completed after pressing, and the operation process is simple and effective.

The above example 1 is only a basic pressing method, and the connection position and the number of the beam and the longitudinal beam are adjusted, and the jack is arranged correspondingly, and the pile pressure mode of the plurality of brackets can be formed.

Figure 3-A shows the basic jack set at one end of the pressurization mode, and the shape of the bracket is U-shaped and rotated 90 ° counterclockwise. Figure 3-B shows the two jacks pressed from the ends to the middle, and the shape of the bracket is 90° counterclockwise. Figure 3-C shows the way in which the two jacks are placed in the middle to pressurize the ends.

The hollow arrows in the above 3 figures indicate the direction of the pressing force.

The technical solution of the invention overcomes the deficiencies of the existing battery bolts to form a battery stack, and designs a simple jack compact assembly method, which has uniform pressure, good sealing effect, simple operation and convenient replacement of various components. More importantly, it is possible to enlarge the area of the panel, not only to make the area of the panel more than 0. 5 m ² , but also to make 3 m ² or more, which can effectively increase the total energy density of the battery and power.

In the long-term use after the jack is pressed, it is also possible to use 2 to 8 screws to assist the compression to ensure the stability and reliability of the pressing system.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art may use the above-disclosed technical contents to change or modify the equivalent implementation. example. Any simple modifications, equivalent variations and modifications made to the above embodiments in accordance with the technical spirit of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

Claim

A pressing mechanism for assembling a redox flow battery, comprising a base, a plurality of unit battery panels, and a shroud, wherein the shroud is disposed on the base, and the plurality of unit battery panels are disposed In the enclosure, an end plate is disposed at an end of the plurality of unit battery panels, wherein the end plate is pressed by at least one jack disposed on the bracket, and the plurality of blocks are pressed The unit battery panel is pressed and fixed.

2. The pressing mechanism for redox flow battery assembly according to claim 1, wherein: the surrounding frame is composed of longitudinal beams on both sides and at least two disposed on the longitudinal beam The beam is formed by the beam, the stringer is disposed on the frame, and the jack is disposed on the beam.

3 . The pressing mechanism for assembling a redox flow battery according to claim 1 or 2, wherein: the top end of the jack is connected with a top frame, and the jack passes through the top frame Pressed on the end plate.

4. The pressing mechanism for redox flow battery assembly according to claim 1, wherein: a plurality of brackets are arranged on the side members of the two sides, and inner faces of the plurality of brackets are abutted Relying on the end face of the unit panel.

5. The pressing mechanism for redox flow battery assembly according to claim 2, wherein: each of the longitudinal beams is provided with a plurality of longitudinal beam positioning holes, and the beam can be along The longitudinal beam is moved, and the beam is positioned through the longitudinal beam positioning hole.

6. The pressing mechanism for redox flow battery assembly according to claim 1 or 2, wherein: the pressing manner of the jack is pressed from one outer end, or two outer end pressures Tightly, or set the jack to the outer end to press.

7. The pressing mechanism for redox flow battery assembly according to claim 6, wherein: the jack is a hydraulic jack, or a screw jack, or a ratchet jack, or a connecting rod jack; One, two or four.

8. The pressing mechanism for redox flow battery assembly according to claim 1, wherein: the end plate is provided with a plurality of through holes.

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