Flow battery welding and detecting integrated device and welding and detecting method and application thereof

Abstract

The invention discloses a flow battery welding and detecting integrated device and a welding and detecting method and application thereof, and belongs to the field of flow batteries. The flow battery welding and detecting integrated device comprises a device bottom plate, a movable bottom plate and a top plate, first glass and second glass are arranged on the top plate; an air pipe joint and a pressure gauge are arranged on one side, deviating from the movable bottom plate, of the second glass; a welding station and a detection station are arranged on the movable bottom plate; and the welding station and the detection station are respectively positioned below the first glass and the second glass. According to the device, welding and detection between the ion conduction membrane or the bipolar plate and the electrode frame of the flow battery are realized in the same device, and the welding quality of all welding parts is synchronously detected, so that the problem that the welding quality is not detected after the ion conduction membrane or the bipolar plate and the electrode frame are welded in the flow battery is solved; and the quality stability of a welding piece and the performance stability and reliability of a galvanic pile are ensured.

Description

Technical Field

[0001] The present application relates to a liquid flow battery welding and detection integrated device and a welding and detection method and application thereof, belonging to the field of liquid flow batteries. Background Art

[0002] Under the background of vigorously building new power systems, energy storage technology has received extensive attention as a key supporting technology for new power systems. Various types of energy storage technologies have emerged and have developed tremendously. In the field of long-term energy storage, it is generally believed that liquid flow battery technology, especially all-vanadium liquid flow battery technology, has a bright future. Due to its advantages of capacity and power decoupling, deep charging and discharging, long life and good safety, dozens of application demonstrations including 100MW energy storage power stations have been implemented in the past 10 years. At present, it is entering the early stage of commercialization, and the function and reliability of the product need to be tested by the market. Among the components of liquid flow batteries, ion conduction membrane is one of the most important materials, which determines the efficiency, capacity retention rate and reliability of the battery, and is usually regarded as the top priority of liquid flow battery research and development. As a conductive component connecting single cells in the battery stack, the working stability and resistance of the bipolar plate have attracted the attention of various manufacturers. In order to ensure the excellent sealing and stability of the above two materials during the assembly process of the battery stack, the two materials are usually laser welded to the corresponding electrode frame to form an integrated welded assembly. However, there is still a lack of corresponding detection of the welding quality of the welded assembly. Using uninspected welded components to assemble the battery stack will make it impossible to control the product quality of the battery stack. In serious cases, components with poor welding quality will cause the positive and negative electrolytes to be connected, releasing a large amount of heat or conducting the positive and negative electrodes, causing the electrodes to melt and burn, and other serious damage to the battery stack. Therefore, ensuring the welding quality of welded components is the key to improving the reliability of flow battery stacks. Summary of the invention

[0003] According to one aspect of the present application, a liquid flow battery welding and detection integrated device is provided, which realizes the welding and detection between the ion conduction membrane or bipolar plate and the electrode frame of the liquid flow battery in the same device, and synchronously detects the welding quality of all welded parts, thereby solving the problem of lack of detection of welding quality after welding the ion conduction membrane or bipolar plate and the electrode frame in the liquid flow battery, and ensuring the quality stability of the welded parts and the performance stability and reliability of the battery stack.

[0004] The integrated flow battery welding and detection device described in the present application comprises a device bottom plate, a movable bottom plate, and a top plate;

[0005] The device bottom plate, the movable bottom plate and the top plate are arranged in parallel;

[0006] The movable bottom plate and the top plate are movably connected;

[0007] A cylinder is provided on the bottom plate of the device;

[0008] The cylinder is provided with a push rod;

[0009] The top rod is connected to the movable bottom plate;

[0010] The top plate is provided with a first glass and a second glass;

[0011] A gas pipe joint and a pressure gauge are provided on the side of the second glass facing away from the movable bottom plate;

[0012] The movable bottom plate is provided with a welding station and a testing station;

[0013] The welding station and the inspection station are respectively located under the first glass and the second glass.

[0014] Optionally, a first rubber member is provided on a side of the first glass facing the movable bottom plate;

[0015] A second rubber piece is arranged on the side of the second glass facing the moving bottom plate.

[0016] Optionally, the second rubber member includes a closed-loop outer rubber wire and a rubber ring.

[0017] The rubber ring is located inside the outer rubber line of the closed loop;

[0018] Optionally, the first rubber member is a closed-loop outer rubber wire;

[0019] Optionally, the first glass is colorless.

[0020] Optionally, the first rubber member and the second rubber member are independently transparent or translucent.

[0021] Optionally, the light transmittance of the first rubber member and the second rubber member are independently greater than 70%.

[0022] Optionally, the integrated flow battery welding and testing device further includes an automated moving slide rail and a positioning device;

[0023] The automated movable slide rail and the positioning device are located between the welding station and the testing station.

[0024] The automatic moving slide rail and positioning device of the present invention ensure the automatic operation. The welding assembly is constantly transferred between the welding station and the inspection station to form an integrated welding and inspection process, ensuring that the welding quality of each welding assembly is inspected accordingly.

[0025] In another aspect, the present application provides a welding and testing method, comprising the following steps:

[0026] (1) Position the welding assembly on the welding station so that the first rubber piece is located at the welding path directly above the welding assembly, start the cylinder, push the movable bottom plate to the top plate, and the first rubber piece is pressed between the welding assembly and the first glass. The welding laser head welds the connector and the electrode frame together along the welding path to complete the welding operation;

[0027] (2) Stop the cylinder operation, move the bottom plate back to its original position, and move the welding assembly to the inspection station so that the projection of the closed-loop outer rubber line on the electrode frame is located within the outer edge of the electrode frame and is in the area outside the through hole of the electrode frame; the projection of the rubber ring on the electrode frame is concentric with the through hole of the electrode frame and is outside the edge of the through hole;

[0028] (3) starting the cylinder to push the movable bottom plate to the top plate, and the second rubber member is pressed between the welding assembly and the second glass, thereby forming a closed space between the welding assembly and the second glass;

[0029] (4) Connect compressed air or other inert gas to the air pipe joint and pressurize it. At the same time, observe the initial reading of the pressure gauge and the change in the reading when maintaining pressure to complete the detection operation.

[0030] Optionally, the welding assembly includes a welding base plate, a connecting member and an electrode frame;

[0031] The welding bottom plate is provided with a boss;

[0032] The connecting member is arranged on the boss;

[0033] The electrode frame is provided with a groove;

[0034] The connecting piece is connected to the welding base plate and the electrode frame by buckling with the groove and the boss;

[0035] The electrode frame is provided with through holes and welding paths;

[0036] The connecting piece is an ion conducting membrane or a bipolar plate.

[0037] Optionally, when the connecting piece is an ion conducting membrane, the inflation pressure is ≤0.04Mpa.

[0038] Optionally, when the connecting piece is a bipolar plate, the inflation pressure is ≤0.1Mpa.

[0039] Optionally, the pressure gauge indication change within the pressure holding period of 1 minute can be detected. For welded parts with excellent welding quality, the pressure holding capacity should be guaranteed to be less than 0.005 MPa per hour.

[0040] The beneficial effects of this application include:

[0041] The present application provides an integrated device for welding and detecting a liquid flow battery, which realizes the welding and detection between the ion conduction membrane or bipolar plate and the electrode frame of the liquid flow battery in the same device, and simultaneously detects the welding quality of all welded parts, thereby solving the problem of lack of detection of the welding quality after the ion conduction membrane or bipolar plate and the electrode frame are welded in the liquid flow battery, and ensuring the quality stability of the welded parts and the performance stability and reliability of the battery stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is an isometric view of a flow battery welding and detection integrated device of the present application;

[0043] Figure 2 A top view of a liquid flow battery welding and detection integrated device proposed by the present invention;

[0044] Figure 3 A front view of a liquid flow battery welding and detection integrated device proposed by the present invention;

[0045] Figure 4 A side view of a liquid flow battery welding and detection integrated device proposed by the present invention;

[0046] Figure 5 Components for welding and testing battery assemblies;

[0047] Figure 6 Isometric view of the welding assembly placed in position within the apparatus;

[0048] Figure 7 Top view of the welding assembly placed in the workstation within the apparatus.

[0049] List of parts and reference numerals:

[0050] 1. Installation base plate 2. Mobile base plate 3. Top plate

[0051] 4. First glass 5. Pressure gauge 6. Air pipe joint

[0052] 7. Second glass 8. First rubber member 9. Second rubber member

[0053] 10. Cylinder 11. Welding base plate 12. Connectors

[0054] 13. Electrode frame 14. Welding station 15. Inspection station

[0055] 16. Welding path DETAILED DESCRIPTION

[0056] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0057] Unless otherwise specified, the raw materials in the examples of this application were purchased through commercial channels.

[0058] Example

[0059] See also Figure 1-Figure 4 The integrated flow battery welding and detection device comprises a device bottom plate 1, a movable bottom plate 2, and a top plate 3;

[0060] The device bottom plate 1, the movable bottom plate 2 and the top plate 3 are arranged in parallel;

[0061] The movable bottom plate 2 and the top plate 3 are movably connected;

[0062] A cylinder 10 is provided on the bottom plate 1 of the device;

[0063] The cylinder 10 is provided with a push rod;

[0064] The top rod is connected to the movable bottom plate 2;

[0065] The top plate 3 is provided with a first glass 4 and a second glass 7;

[0066] The first glass 4 is colorless;

[0067] A gas pipe joint 6 and a pressure gauge 5 are provided on the side of the second glass 7 facing away from the movable bottom plate 2;

[0068] A first rubber member 8 is provided on the side of the first glass 4 facing the movable bottom plate 2;

[0069] The first rubber member 8 is a closed-loop outer rubber wire;

[0070] A second rubber member 9 is provided on the side of the second glass 7 facing the movable bottom plate 2;

[0071] The second rubber member 9 comprises a closed-loop outer rubber wire and a rubber ring;

[0072] The rubber ring is located inside the outer rubber line of the closed loop;

[0073] The first rubber member 8 and the second rubber member 9 are independently transparent or translucent (light transmittance>70%);

[0074] The movable bottom plate 2 is provided with a welding station 14 and a detection station 15;

[0075] The welding station 14 and the inspection station 15 are respectively located below the first glass 4 and the second glass 7 .

[0076] Optionally, the integrated flow battery welding and testing device further includes an automated moving slide rail and a positioning device;

[0077] The automated movable slide rail and the positioning device are located between the welding station 14 and the inspection station 15 .

[0078] See also Figure 5 , the welding assembly includes a welding base plate 11, a connecting member 12 and an electrode frame 13;

[0079] The welding base plate 11 is provided with a boss;

[0080] The connecting member 12 is arranged on the boss;

[0081] The electrode frame 13 is provided with a groove;

[0082] The connecting member 12 is connected to the welding base plate 11 and the electrode frame 13 by buckling with the groove and the boss;

[0083] The electrode frame 13 is provided with through holes and welding paths.

[0084] The connecting member 12 is an ion conducting membrane or a bipolar plate.

[0085] A welding and testing method comprises the following steps:

[0086] (1) The welding assembly is positioned on the welding station 14 so that the first rubber member 8 is located at the welding path 16 directly above the welding assembly. The cylinder 10 is started to push the movable bottom plate 2 up to the top plate 3. The first rubber member 8 is pressed between the welding assembly and the first glass 4. The welding laser head welds the connecting member 12 and the electrode frame 13 into one piece along the welding path 16 to complete the welding operation.

[0087] (2) Stop the operation of the cylinder 10, move the bottom plate 2 back to its original position, and move the welding assembly to the inspection station 15, so that the projection of the closed-loop outer rubber line on the electrode frame 13 is located within the outer edge of the electrode frame 13 and is located outside the through hole of the electrode frame 13; the projection of the rubber ring on the electrode frame 13 is concentric with the through hole of the electrode frame 13 and is outside the edge of the through hole;

[0088] (3) The cylinder 10 is started to push the movable bottom plate 2 up to the top plate 3, and the second rubber member 9 is pressed between the welding assembly and the second glass 7, thereby forming a closed space between the welding assembly and the second glass 7;

[0089] (4) Connect compressed air or other inert gas to the air pipe joint 6 and pressurize it. At the same time, observe the initial reading of the pressure gauge 5 and the change in reading during pressure maintenance to complete the detection operation. When the connecting part is an ion conductive membrane, the pressure of the gas injection is ≤0.04Mpa. When the connecting part is a bipolar plate, the pressure of the gas injection is ≤0.1Mpa. Detect the change in the reading of the pressure gauge 5 within 10 minutes of pressure maintenance. For welded parts with excellent welding quality, the pressure maintenance capacity should ensure that the pressure reduction is less than 0.005Mpa per hour.

[0090] Place the welding assembly in the working position of the device, such as Figure 6-7 .

[0091] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A flow battery welding and detection integrated device, It is characterized in that The integrated flow battery welding and detection device comprises a device bottom plate, a movable bottom plate, and a top plate; The device bottom plate, the movable bottom plate and the top plate are arranged in parallel; The movable bottom plate and the top plate are movably connected; A cylinder is provided on the bottom plate of the device; The cylinder is provided with a push rod; The top rod is connected to the movable bottom plate; The top plate is provided with a first glass and a second glass; A gas pipe joint and a pressure gauge are provided on the side of the second glass facing away from the movable bottom plate; The movable bottom plate is provided with a welding station and a testing station; The welding station and the inspection station are respectively located under the first glass and the second glass.

2. According to claim 1, the integrated device for welding and detecting a flow battery, It is characterized in that A first rubber member is disposed on the side of the first glass facing the movable bottom plate; A second rubber piece is arranged on the side of the second glass facing the moving bottom plate.

3. According to claim 2, the integrated device for welding and detecting a flow battery, It is characterized in that The first rubber member is a closed-loop outer rubber wire; Preferably, the second rubber member comprises a closed-loop outer rubber wire and a rubber ring; The rubber ring is located inside the outer rubber line of the closed loop.

4. According to claim 2, the integrated device for welding and detecting a flow battery, It is characterized in that The first rubber member and the second rubber member are independently transparent or translucent; Preferably, the light transmittance of the first rubber member and the second rubber member are independently greater than 70%.

5. According to claim 1, the integrated device for welding and detecting a flow battery, It is characterized in that The integrated flow battery welding and testing device also includes an automated moving slide rail and a positioning device; The automated movable slide rail and the positioning device are located between the welding station and the testing station.

6. A welding and testing method, It is characterized in that The following steps are included: (1) Position the welding assembly on the welding station so that the first rubber piece is located at the welding path directly above the welding assembly, start the cylinder, push the movable bottom plate to the top plate, and the first rubber piece is pressed between the welding assembly and the first glass. The welding laser head welds the connector and the electrode frame together along the welding path to complete the welding operation; (2) Stop the cylinder operation, move the bottom plate back to its original position, and move the welding assembly to the inspection station so that the projection of the closed-loop outer rubber line on the electrode frame is located within the outer edge of the electrode frame and is in the area outside the through hole of the electrode frame; the projection of the rubber ring on the electrode frame is concentric with the through hole of the electrode frame and is outside the edge of the through hole; (3) starting the cylinder to push the movable bottom plate to the top plate, and the second rubber member is pressed between the welding assembly and the second glass, thereby forming a closed space between the welding assembly and the second glass; (4) Connect compressed air or other inert gas to the air pipe joint and pressurize it. At the same time, observe the initial reading of the pressure gauge and the change in the reading when maintaining pressure to complete the detection operation.

7. The welding and testing method according to claim 6, It is characterized in that The welding assembly comprises a welding base plate, a connecting piece and an electrode frame; The welding bottom plate is provided with a boss; The connecting member is arranged on the boss; The electrode frame is provided with a groove; The connecting piece is connected to the welding base plate and the electrode frame by buckling with the groove and the boss; The electrode frame is provided with through holes and welding paths; The connecting piece is an ion conducting membrane or a bipolar plate.

8. The welding and testing method according to claim 7, It is characterized in that When the connecting piece is an ion conducting membrane, the inflation pressure is ≤0.04Mpa.

9. The welding and testing method according to claim 7, It is characterized in that When the connecting piece is a bipolar plate, the inflation pressure is ≤0.1Mpa.

10. The welding and testing method according to claim 6, It is characterized in that Check the change in the pressure gauge reading within 10 minutes of pressure maintenance. For weldments with excellent welding quality, the pressure maintenance capacity should ensure that the pressure reduction is less than 0.005Mpa per hour.

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