A limiting device for a flow battery stack

Abstract

The application belongs to the technical field of liquid flow battery, and particularly relates to a limiting device for a liquid flow battery stack, which comprises a long limiting device, a short limiting device and a connecting module. The long and short double-specification limiting devices cooperate with a fixing nut to form a mechanical limiting structure, which can effectively limit the rotation of the target nut when operating on one side of the stack, thereby creating stable conditions for the nut tightening operation on the other side of the stack, avoiding complex pipelines and the overlength of the stack and the like, reducing the input of human resources and improving the bolt tightening efficiency.

Description

Technical Field

[0001] This application relates to the field of flow battery technology, and in particular to a limiting device for a flow battery stack. Background Technology

[0002] Among numerous energy storage technologies, flow battery technology has become one of the preferred technologies for large-scale energy storage system applications due to its advantages such as power and capacity decoupling, high reliability, good safety, and long lifespan.

[0003] With the accelerated global energy transition, the rapid development of renewable energy has become an irreversible trend. Among numerous energy storage technologies, flow batteries, with their unique advantages, have ushered in unprecedented development opportunities. Globally, all-vanadium redox flow batteries have begun to gradually move towards engineering demonstrations and commercial applications, and the scale of individual projects is gradually expanding. Although the technology of all-vanadium redox flow batteries has a promising future, many technical challenges remain to be overcome.

[0004] The length of the fuel cell stack and the limited space created by the piping layout mean that installing the bolts requires two people working together or special tools, resulting in a waste of human resources and increased installation difficulty. Utility Model Content

[0005] This utility model aims to provide a limiting device for a flow battery stack that reduces manpower and operational difficulty. It includes: a long limiting module, a short limiting module, and a connecting module for connecting and adjusting the angle of the long and short limiting modules. The long limiting module has a long module positioning hole for fixing its position, several long module limiting holes for lateral adjustment, several long module connecting holes for connecting the long limiting module and the connecting module, two electrolyte pipe clearance grooves for avoiding electrolyte pipes and fixing the installation position, and two positioning rod clearance grooves for avoiding positioning rods and fixing the installation position. The short limiting module has a short module positioning hole for fixing its position, several short module limiting holes for lateral adjustment, and several short module connecting holes for connecting the short limiting module and the connecting module. One end of the connecting module connects to the long module connecting hole on the long limiting module, and the other end connects to the short module connecting hole on the short limiting module.

[0006] Preferably, the limiting device is installed at one end of the screw on the end plate of the flow battery stack, restricting the rotation of the nut on the screw. The electrolyte pipeline clearance groove is close to the electrolyte pipeline; the positioning rod clearance groove is close to the positioning rod.

[0007] Preferably, the number of long module limiting holes on the long limiting module is one less than the number of longitudinal screws on the fuel cell end plate. The width dimension is equal to the distance between the two parallel surfaces of the screw and nut. The length dimension is greater than the straight-line distance between the two diagonals of the screw and nut, and less than the difference between half of the hole spacing and three times the thickness of the limiting device. The length dimension of the long module positioning hole is equal to the distance between the two parallel surfaces of the screw and nut, the width dimension is equal to the diagonal length of the screw and nut, and it is located at the end away from the connecting module.

[0008] Preferably, the number of short module limiting holes on the short limiting module is two times the number of transverse screws on the fuel cell end plate, and the size is the same as the size of the long module limiting holes. The size of the short module positioning holes is the same as the size of the long module positioning holes.

[0009] Preferably, the number of electrolyte pipe clearance grooves is 2, and the shape is an arc-shaped groove. The radius of the arc is equal to 1.1-1.5 times the radius of the electrolyte pipe, and the angle of the arc is equal to 30°-180°.

[0010] Preferably, the number of positioning rod clearance grooves is 2, the shape is an arc-shaped groove, the radius of the arc is equal to 1.1-1.5 times the radius of the positioning rod, and the angle of the arc is equal to 30°-180°.

[0011] Preferably, a buffer layer is provided on the side of the long limiting module near the electrolyte pipe. The buffer layer is made of one of the following materials: rubber, sponge, or silicone. This is used to reduce wear caused by friction between the limiting device, the positioning rod, and the electrolyte pipe.

[0012] Preferably, the angle formed by the two sides of the connecting module can be adjusted arbitrarily, and can be adjusted left and right in the direction of the long module connecting hole and the short module connecting hole. Beneficial effects

[0013] This application uses long and short dual-specification limiting devices to work together to fix the nut, forming a mechanical limiting structure. When operating on one side of the fuel cell stack, it can effectively limit the rotation of the target nut, creating stable conditions for the nut tightening operation on the other side of the fuel cell stack. This avoids factors such as complex pipelines and excessively long fuel cell stacks, reduces the input of human resources, and improves bolt tightening efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing the installation position of the limiting device in this application;

[0015] Figure 2 This is a schematic diagram of the limiting device structure of this application;

[0016] Explanation of reference numerals in the attached drawings: 1. Limiting device; 2. Screw; 3. End plate; 4. Electrolyte pipeline; 5. Positioning rod; 11. Long limiting module; 12. Short limiting module; 13. Connecting module; 111. Long module positioning hole; 112. Long module connecting hole; 113. Long module limiting hole; 114. Electrolyte pipeline clearance groove; 115. Positioning rod clearance groove; 116. Buffer layer; 121. Short module limiting hole; 122. Short module connecting hole; 123. Short module positioning hole. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-2 The present application will be further described in detail with reference to specific embodiments.

[0018] This application discloses a limiting device for a flow battery stack. The limiting device 1 includes: a long limiting module 11, a short limiting module 12, and a connecting module 13; the long limiting module 11 and the short limiting module 12 are connected and angle-adjustable through the connecting module 13; the long limiting module 11 is provided with a long module positioning hole 111, a plurality of long module limiting holes 113, a plurality of long module connecting holes 112, two electrolyte pipe clearance grooves 114, and two positioning rod clearance grooves 115; the short limiting module 11... Block 12 is provided with a short module positioning hole 123, several short module limiting holes 121, and several short module connecting holes 122; one end of the connecting module 13 is connected to the long module connecting hole 112 on the long limiting module 11, and the other end is connected to the short module connecting hole 122 on the short limiting module 12; the limiting device 1 is installed on one end of the screw 2 on the end plate 3 of the flow battery stack; the electrolyte pipeline clearance groove 114 is close to the electrolyte pipeline 4; the positioning rod clearance groove 115 is close to the positioning rod 5. The number of long module limiting holes (113) on the long limiting module 11 is one less than the number of longitudinal screws 2 on the fuel cell end plate 3. The width is equal to the distance between the two parallel surfaces of the screw 2 and nut. The length is greater than the straight-line distance between the two diagonals of the screw 2 and nut, and less than half the difference between the hole spacing and three times the thickness of the limiting device. The length of the long module positioning hole 111 is equal to the distance between the two parallel surfaces of the screw 2 and nut, and the width is equal to the diagonal length of the screw 2 and nut. It is located at the end away from the connecting module 13. The number of short module limiting holes 121 on the short limiting module 12 is two less than the number of transverse screws 2 on the fuel cell end plate 3. The size is the same as the size of the long module limiting holes 113. The size of the short module positioning hole 123 is the same as the size of the long module positioning hole 111. There are two electrolyte pipe clearance grooves 114, each with an arc-shaped groove. The radius of the arc is 1.1-1.5 times the radius of the electrolyte pipe 4, and the angle of the arc is 30°-180°. There are two positioning rod clearance grooves 115, each with an arc-shaped groove. The radius of the arc is 1.1-1.5 times the radius of the positioning rod (5), and the angle of the arc is 30°-180°. A buffer layer 116 is provided on the side of the long limiting module 11 that is close to the electrolyte pipe 4. The buffer layer is made of one of rubber, sponge, or silicone. The angle formed by the two sides of the connecting module 13 can be adjusted arbitrarily, and can be adjusted left and right in the direction of the long module connecting hole 112 and the short module connecting hole 122.

[0019] Example: The flow battery stack limiting device 1 used in an energy storage project is installed on one end of the screw 2 on the end plate 3 of the flow battery stack. It includes a long limiting module 11, a short limiting module 12, and a connecting module 13. Both the long limiting module 11 and the short limiting module 12 are made of steel plates with a thickness of 3mm. They are connected by the connecting module 13 and the angle is adjustable to 85°. The long limiting module 11 is provided with one long module positioning hole 111 with a size of 65×80mm, nine long module limiting holes 113 with a size of 65×180mm, two long module connecting holes 112 with a size of 10×50mm, two electrolyte pipe clearance grooves 114 with a radius of 75mm and an angle of 120°, and two positioning rod clearance grooves 115 with a radius of 8mm and an angle of 150°. The short limiting module 12 is provided with one short module positioning hole 123 with a size of 65×80mm, four short module limiting holes 121 with a size of 65×180mm, and two short module connecting holes 122 with a size of 10×50mm. The electrolyte pipe clearance groove 114 is close to the electrolyte pipe 4, and the positioning rod clearance groove 115 is close to the positioning rod 5. The number of long module limiting holes (113) on the long limiting module 11 is one less than the number of longitudinal screws 2 on the fuel cell end plate 3. The width is equal to the distance between the two parallel surfaces of the screw 2 and nut. The length is greater than the straight-line distance between the two diagonals of the screw 2 and nut, and less than half the difference between the hole spacing and three times the thickness of the limiting device. The length of the long module positioning hole 111 is equal to the distance between the two parallel surfaces of the screw 2 and nut, and the width is equal to the diagonal length of the screw 2 and nut. It is located at the end away from the connecting module 13. A rubber buffer layer 116 is provided on the side of the long limiting module 11 near the electrolyte pipe 4.

[0020] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A limiting device for a flow battery stack, characterized in that, The limiting device (1) includes: a long limiting module (11), a short limiting module (12), and a connecting module (13); the long limiting module (11) and the short limiting module (12) are connected and their angles are adjusted through the connecting module (13); the long limiting module (11) is provided with a long module positioning hole (111), several long module limiting holes (113), several long module connecting holes (112), two electrolyte pipeline clearance grooves (114), and two positioning rod clearance grooves (115); the short limiting module (12) is provided with a short module Block positioning hole (123), several short module limiting holes (121), several short module connecting holes (122); one end of the connecting module (13) is connected to the long module connecting hole (112) on the long limiting module (11), and the other end is connected to the short module connecting hole (122) on the short limiting module (12); the limiting device (1) is installed on one end of the screw (2) on the end plate (3) of the flow battery stack; the electrolyte pipeline clearance groove (114) is close to the electrolyte pipeline (4); the positioning rod clearance groove (115) is close to the positioning rod (5).

2. The limiting device according to claim 1, characterized in that, The number of long module limiting holes (113) on the long limiting module (11) is one less than the number of longitudinal screws (2) on the fuel cell end plate (3). The width dimension is equal to the distance between the two parallel surfaces of the screw (2) and nut. The length dimension is greater than the straight distance between the two opposite corners of the screw (2) and nut, and less than half the difference between the hole spacing and three times the thickness of the limiting device. The length dimension of the long module positioning hole (111) is equal to the distance between the two parallel surfaces of the screw (2) and nut, and the width dimension is equal to the diagonal length of the screw (2) and nut. It is located at the end away from the connecting module (13).

3. The limiting device according to claim 1, characterized in that, The number of short module limiting holes (121) on the short limiting module (12) is two times the number of transverse screws (2) on the fuel cell end plate (3), and the size is the same as the size of the long module limiting hole (113); the size of the short module positioning hole (123) is the same as the size of the long module positioning hole (111).

4. The limiting device according to claim 1, characterized in that, The number of electrolyte pipe clearance grooves (114) is 2, and the shape is an arc-shaped groove. The radius of the arc is equal to 1.1-1.5 times the radius of the electrolyte pipe (4), and the angle of the arc is equal to 30°-180°.

5. The limiting device according to claim 1, characterized in that, The number of positioning rod clearance grooves (115) is 2, and the shape is an arc-shaped groove. The radius of the arc is equal to 1.1-1.5 times the radius of the positioning rod (5), and the angle of the arc is equal to 30°-180°.

6. The limiting device according to claim 1, characterized in that, A buffer layer (116) is provided on the side of the long limiting module (11) that is close to the electrolyte pipe (4). The buffer layer is made of one of the following materials: rubber, sponge, or silicone.

7. The limiting device according to claim 1, characterized in that, The angle formed by the two sides of the connecting module (13) can be adjusted at will, and can be adjusted left and right in the direction of the long module connecting hole (112) and the short module connecting hole (122).

Images