A fixture for single cell testing
By using an inner and outer sleeve made of high-temperature resistant ceramic materials, combined with a platinum mesh and connectors, the problems of poor contact, gas mixing, and precious metal consumption in solid oxide fuel cell testing were solved, achieving stable connection and independent gas recovery, thus improving the accuracy and economy of testing.
Patent Information
- Application Number
- CN202521334062.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-06-27
AI Technical Summary
In the existing technology, the electrochemical testing methods for solid oxide fuel cells have problems such as poor contact between the clamp and the electrode, stress concentration, gas mixing, poor sealing, and high cost of precious metal consumables, which affect the accuracy and economy of the test.
The inner and outer sleeves are made of high-temperature resistant ceramic material and are in contact with the electrodes through a platinum mesh. A connector is used to ensure a stable connection, and two reaction gases are recovered through independent conduits, achieving good electrode contact and independent gas recovery.
It improves the stability of battery testing and the lifespan of the connection device, ensures the accuracy of test results and the pure recovery of gas, and reduces the consumption of precious metal consumables.
Smart Images
Figure CN224682268U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of battery testing devices, specifically relating to a fixed device for testing a single battery. Background Technology
[0002] Solid oxide fuel cells (SOFCs) are highly efficient and clean electrochemical power generation devices, typically operating at temperatures above 600°C. They generally consist of a porous anode, a dense electrolyte, and a porous cathode. During operation, suitable porous current collectors are fitted to both ends of the electrodes. These current collectors collect the electrical energy generated by the cell and then guide it out through leads. Therefore, research on SOFC technology usually requires performance testing of individual cells to evaluate the performance and stability of the electrode materials, electrolyte materials, or the overall cell. During cell testing, a reliable electrochemical testing device is needed to achieve a stable connection with the cell, ensuring the independence of different reactant gases, the accuracy of the test, and the safety of the cell during testing.
[0003] In previous studies, the main methods for testing the performance of individual batteries were as follows: The first method is to directly sinter the leads and current collectors onto the electrode surface using silver paste. This method avoids the need for external equipment to allow the current collectors and battery electrodes to come into contact, effectively reducing mechanical contact between the current collectors and electrodes, thereby reducing stress between the current collectors and electrodes and lowering the strength requirements for the battery itself. However, this method causes the current collector material to be consumed rapidly during testing, and current collectors are generally used only once. Moreover, silver paste can easily clog the pores on the electrode surface, affecting the performance testing of the battery itself. The second method involves using clamps to create mechanical contact between the current collector and the battery electrodes. In this method, the clamps are detachable, allowing for intermittent and repeated use of the current collector to improve its efficiency. However, when the current collector is pressed against the electrode by the clamps, it's difficult to ensure that the compressive stress generated by the tight contact between the current collector and the electrode does not cause stress concentration or thermal stress due to high temperatures. Furthermore, the end of the inner sleeve closest to the solid oxide fuel cell is sealed to the corresponding electrode using high-temperature resistant ceramic adhesive. Since the battery typically needs to be removed by cutting after testing, sealing both electrodes makes it inconvenient to remove the battery using a cutting machine.
[0004] Furthermore, previous studies often failed to guarantee the independent recovery of reactant gases. For electrochemical testing of solid oxide fuel cells, semi-sealed nested fixtures were typically used to recover and test only one type of reactant gas, or sealed fixtures were used. However, the reactant gases from the two electrodes of the battery are mixed in the inlet and outlet, making it difficult to guarantee the purity of the recovered electrode reactant gases.
[0005] In summary, the current testing methods for solid oxide fuel cells have the following problems: 1. It is impossible to achieve precise and easy-to-operate alignment of the clamp and battery electrodes. If poor contact occurs, it will affect the accuracy of the test results and may cause stress concentration at the contact point between the current collector and the electrode, resulting in damage to the current collector or the electrode.
[0006] 2. With both electrodes of the battery sealed, it is not convenient to remove the tested solid oxide fuel cell by cutting.
[0007] 3. It is impossible to independently recover the different reaction gases of the two electrodes, and it is difficult to guarantee the purity of the recovered electrode reaction gases.
[0008] 4. Some of the original methods were too expensive. In the typical silver-soldering method, the use of precious metals such as silver wire, silver paste, platinum wire, and gold wire is a one-time use, and a lot of money is needed to purchase these precious metal consumables. Summary of the Invention
[0009] This invention provides a fixing device for single battery testing, which can increase the stability of battery testing and the service life of the connecting device, and can also recover the gas passing through the two electrodes separately.
[0010] To achieve the above objectives, the present invention adopts the following technical solution: A fixing device for testing a single battery includes: inner sleeves symmetrically arranged at both ends of the battery, a conduit disposed inside the inner sleeve, a platinum mesh disposed at the end of the conduit in contact with the battery to collect the electrical energy generated by the battery as a porous current collector, a lead wire disposed on the platinum mesh, the lead wire being connected to an external battery testing device, and the end of one inner sleeve near the battery being sealed with the corresponding electrode by a sealing material, and the two symmetrically arranged inner sleeves being stably connected by a connector.
[0011] Two inner sleeves are connected to outer sleeves, and high-temperature resistant sealing rings are installed at both ends of the outer sleeves. The two sealing rings are respectively fitted onto the outside of the two inner sleeves to seal the ends of the ceramic outer sleeves and the inner sleeves.
[0012] The connector has clamping components at both ends, clamping the two inner sleeves at the ends furthest from the battery. Each clamping component includes a clamping plate and a connecting rod. One side of the clamping plate is fixedly connected to one end of the connecting rod, and a rotating shaft is rotatably mounted on the other end of the connecting rod, through which a screw passes. The other side of the clamping plate is used to clamp the inner sleeves. Nuts are installed on the upper and lower surfaces of the connecting rod of one of the clamping components, and a rotating rod is installed on the surface of the nut. The two clamping components are connected by an axially movable screw. By rotating the screw, the first and second connectors move, so that when the first and second connectors approach each other, the two inner sleeves are squeezed against the battery end by the platinum mesh at the end of the conduit, achieving good contact between the current collector and the battery electrode during testing.
[0013] The clamping plate includes a first clamping plate and a second clamping plate; one side of the first clamping plate is fixedly connected to one end of a connecting rod, and the other side is detachably fitted with the second clamping plate; the first clamping plate and the second clamping plate are detachably connected by a second screw and a wing nut; a second rotating shaft is rotatably mounted at both ends of the first clamping plate, a second screw is installed inside the second rotating shaft, and a wing nut is screwed onto the end of the second screw, the wing nut being located at the end of the second clamping plate.
[0014] The inner sleeve, outer sleeve, and conduit are all made of high-temperature resistant ceramic or corundum materials, and the sealing material is a high-temperature resistant ceramic adhesive.
[0015] Beneficial effects: This utility model provides a fixing device for testing a single battery, which has the following advantages compared with the prior art: 1. The platinum mesh at the ends of the two conduits is in contact with the two electrodes of the battery. The platinum mesh is provided with leads, which are connected to external battery testing equipment to achieve the purpose of battery electrochemical testing. 2. The connector between the two inner sleeves allows for better connection between the two inner sleeves, ensuring contact between the platinum mesh and the electrode, and increasing the stability of the battery during testing. 3. The ceramic outer tubes connected by the two inner tubes are sealed with high-temperature resistant sealing rings, so that gas is filled into the two conduits during the test. The excess gas filled into the conduit on the same side as the second connector flows through the opening to the cavity between the inner tube and the conduit. The excess gas filled into the other conduit enters the cavity of the ceramic outer tube, and then enters the cavity between the inner tube and the conduit on the same side. This makes the cathode atmosphere different from the anode atmosphere, allowing the two electrodes of a fuel cell to operate normally and ensuring that the two gases are recovered independently. 4. When the two ends of the connector are brought close together, the two inner sleeves press the battery end through the platinum mesh at the inner end of the conduit, so as to achieve good contact between the battery electrodes during the test. Attached Figure Description
[0016] Figure 1This is a three-dimensional structural diagram of the fixing device for testing a single battery in an embodiment of this utility model; Figure 2 This is a cross-sectional structural diagram of a single battery testing fixture in an embodiment of this utility model; Figure 3 This is a schematic diagram of the iron pipe, the first connector, and the second connector in an embodiment of this utility model; Figure 4 This is a schematic diagram showing the disassembled structure of the iron pipe, the first connector, and the second connector in an embodiment of this utility model; Figure 5 for Figure 3 Enlarged structural diagram at point A; Figure 6 for Figure 2 Enlarged structural diagram at point B; In the diagram: 1. Inner sleeve; 2. Iron pipe; 3. Battery; 4. First connector; 41. First connecting rod; 42. Clamping component; 421. First clamping plate; 422. Second rotating shaft; 423. Second screw; 424. Wing nut; 425. Second clamping plate; 426. Rubber pad; 427. Limiting slot; 428. Limiting strip; 43. First rotating shaft; 44. First screw; 45. Square nut; 46. Rotating rod; 5. Second connector; 51. Second connecting rod; 6. Platinum mesh; 7. Ceramic outer sleeve; 8. High-temperature resistant sealing ring; 9. Conduit; 900. Opening. Detailed Implementation
[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments: like Figure 1 and Figure 2 As shown, a single battery testing fixture includes two inner sleeves 1 symmetrically arranged at both ends of a battery 3. One end of the battery 3 is bonded to one of the inner sleeves 1 by a high-temperature resistant ceramic adhesive. The inner sleeve 1 has a conduit 9 inside, and the end of the conduit 9 is fixed with a platinum mesh 6 that contacts the electrode of the battery 3. A ceramic outer sleeve 7 for protection and gas storage is sleeved between the two inner sleeves 1. Both ends of the ceramic outer sleeve 7 are equipped with high-temperature resistant sealing rings 8, and the two high-temperature resistant sealing rings 8 are respectively sleeved on the outside of the two inner sleeves 1. A connector for connection is provided between the two inner sleeves 1.
[0018] The inner sleeve 1 on the same side as the second connector 5 is bonded and fixed to one end of the battery 3 with high-temperature resistant ceramic adhesive. The other inner sleeve 1 is located at the other end of the battery 3, so that the platinum mesh 6 at the ends of the two inner sleeves 1 is in contact with the two electrodes of the battery 3. The platinum mesh 6 is provided with leads, which are connected to external battery testing equipment to achieve the purpose of electrochemical testing of the battery 3. The ceramic outer sleeve 7 that is connected to the two inner sleeves 1 is sealed by a high-temperature resistant sealing ring 8, so that gas is filled into the two conduits 9 during the test. The excess gas filled into the conduit 9 on the same side as the second connector 5 flows through the opening 900 to the cavity between the inner sleeve 1 and the conduit 9. The excess gas filled into the other conduit 9 enters the cavity of the ceramic outer sleeve 7, and then enters the cavity between the inner sleeve 1 and the conduit 9 on the same side. This makes the cathode atmosphere different from the anode atmosphere, allowing the two electrodes of the battery 3 to operate normally and ensuring that the two gases are recovered independently. The connector between the two inner sleeves 1 allows the two inner sleeves 1 to be better connected, increasing the stability of the battery 3 during the test.
[0019] like Figure 3 and Figure 4 As shown, the connector includes an iron pipe 2 fixed to the outer surface of the inner sleeve 1 away from the battery 3, a first connector 4 fixed to the outside of one iron pipe 2, and a second connector 5 fixed to the outside of the other iron pipe 2, and the first connector 4 and the second connector 5 are connected. Both the first connecting member 4 and the second connecting member 5 include clamping members 42. The first connecting member 4 also includes a first connecting rod 41, with a first rotating shaft 43 rotatably mounted at the end of the first connecting rod 41. A first screw 44 is installed inside the first rotating shaft 43, and two square nuts 45 are screwed onto the upper end of the first screw 44. A rotating rod 46 is fixed to the outer surface of the square nuts 45. The second connecting member 5 also includes a second connecting rod 51, with the two square nuts 45 clamping the upper and lower surfaces of the second connecting rod 51. Two clamping members 42 are provided, and among them... A clamping member 42 has a first clamping plate 421 welded to the end of the first connecting rod 41, and another clamping member 42 has a first clamping plate 421 welded to the end of the second connecting rod 51. The clamping member 42 also includes a second rotating shaft 422 rotatably mounted at both ends of the first clamping plate 421. A second screw 423 is installed inside the second rotating shaft 422. A wing nut 424 is screwed onto the end of the second screw 423. A second clamping plate 425 is provided on the side of the first clamping plate 421. The wing nut 424 is located at the end of the second clamping plate 425. like Figure 5 As shown, the inner surfaces of the first clamping plate 421 and the second clamping plate 425 are provided with limiting grooves 427. The inner surfaces of the first clamping plate 421 and the second clamping plate 425 are provided with rubber pads 426. The outer surface of the rubber pads 426 is integrally formed with limiting strips 428, and the limiting strips 428 are adhered to the inside of the limiting grooves 427. The first connector 4 and the second connector 5 are arranged in parallel.
[0020] like Figure 6 As shown, gas is introduced through conduit 9 to provide an atmosphere for the electrodes of battery 3. An opening 900 is provided on conduit 9 to allow excess gas to flow into the cavity between conduit 9 and inner sleeve 1. Due to the pushing force of the subsequent gas, it flows away from battery 3 along the cavity, achieving the purpose of recycling. The inner sleeve 1 and battery 3 on the same side as the second connector 5 are fixed with high-temperature resistant ceramic adhesive. The excess gas introduced through the conduit on the same side as the first connector 4 flows out of the conduit through the corresponding opening 900 and enters the cavity of the ceramic outer sleeve 7. Then it flows away from battery 3 along the cavity between conduit 9 and inner sleeve 1 on the same side as the first connector 4, achieving the purpose of recycling. The ceramic outer sleeve 7 can maintain sufficient reaction gas and will not cause insufficient reaction gas in the battery working state due to the pores at the contact position.
[0021] The method of using the device in the electrochemical testing of solid oxide fuel cells is as follows: After ensuring the stability of the battery 3 and contact between the platinum mesh 6 on the same side as the second connector 5, the inner sleeve 1 and the battery 3 are fixed with high-temperature resistant ceramic adhesive. Then, a ceramic outer sleeve 7 is wrapped around the inner sleeve 1, and the inner sleeve 1 on the other side is installed, so that the platinum mesh 6 is tightly attached to the electrode of the battery 3. The connector ensures the stability of the contact between the platinum mesh and the battery 3 during operation. Each platinum mesh 6 is provided with a lead wire, each lead wire is connected to an external battery testing device, and each lead wire passes through the corresponding conduit 9. In this way, the performance of the solid battery 1 can be tested by the external battery testing device.
[0022] The specific working process of the connector is as follows: a first connector 4 and a second connector 5 are installed on the outside of the two iron pipes 2 to connect the two inner sleeves 1. Both the first connector 4 and the second connector 5 include clamping members 42 that hold the iron pipes 2 externally. The first connector 4 also includes a first connecting rod 41 fixed to the clamping member 42. The first connecting rod 41 is connected to a first screw 44 via a first rotating shaft 43 rotatably mounted at its end. This allows the first screw 44 to rotate to the end of the second connecting rod 51, where it is clamped on the upper and lower surfaces of the second connecting rod 51 by two externally screwed square nuts 45. This fixes the second connector 5 and the first connector 4, while simultaneously adjusting the position of the two square nuts 45. When the first connector 4 and the second connector 5 approach each other, the platinum mesh 6 at the end of the conduit 9 squeezes the electrode of the battery 3, achieving good contact between the electrodes of the battery 3 during testing. The clamping member 42 is composed of a first clamping plate 421, a second rotating shaft 422, a second screw 423, a wing nut 424, a second clamping plate 425, a rubber pad 426, a limiting groove 427, and a limiting strip 428. The first clamping plate 421 and the second clamping plate 425 are fixed by the second rotating shaft 422, the second screw 423, and the wing nut 424. At the same time, when the first clamping plate 421 and the second clamping plate 425 are clamped to the outside of the iron pipe 2, they are buffered by the rubber pad 426. The limiting strip 428, integrally formed on the outer surface of the rubber pad 426, is glued and fixed in the limiting groove 427.
[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fixing device for testing a single battery, characterized in that, include: The battery has symmetrically arranged inner sleeves at both ends, with an outer sleeve attached to each inner sleeve. The outer sleeve and the inner sleeve are sealed at both ends. A conduit is installed inside the inner sleeve, and a platinum mesh is installed at the end of the conduit that contacts the battery. A lead wire is installed on the platinum mesh, and the lead wire is connected to an external battery testing device. The two symmetrically arranged inner sleeves are stably connected by a connector.
2. The fixing device for testing a single battery according to claim 1, characterized in that, The conduit has an opening on its side, and the inner sleeve on one side is sealed to the battery at the end closest to the battery.
3. The fixing device for testing a single battery according to claim 1, characterized in that, The connector is provided with clamping parts at both ends, which clamp the two inner sleeves at the ends away from the battery respectively; the two clamping parts are arranged in parallel and connected by an axially movable screw.
4. The fixing device for testing a single battery according to claim 3, characterized in that, An iron pipe is installed between the clamping member and the inner sleeve.
5. The fixing device for single battery testing according to claim 3 or 4, characterized in that, The clamping component includes a clamping plate and a connecting rod; one side of the clamping plate is fixedly connected to one end of the connecting rod, and a rotating shaft is rotatably mounted on the other end of the connecting rod, with a screw passing through the rotating shaft; the other side of the clamping plate is used to clamp the inner sleeve.
6. The fixing device for testing a single battery according to claim 5, characterized in that, Nuts are installed on the upper and lower surfaces of the connecting rod of one of the clamping components, and a rotating rod is installed on the surface of the nut.
7. The fixing device for testing a single battery according to claim 5, characterized in that, The clamping plate includes a first clamping plate and a second clamping plate; one side of the first clamping plate is fixedly connected to one end of the connecting rod, and the other side is detachably fitted with the second clamping plate.
8. The fixture for testing a single battery according to claim 7, characterized in that, The first clamping plate and the second clamping plate are detachably connected by a second screw and a wing nut; a second rotating shaft is rotatably mounted at both ends of the first clamping plate, a second screw is installed inside the second rotating shaft, and a wing nut is screwed onto the end of the second screw, the wing nut being located at the end of the second clamping plate.
9. The fixing device for testing a single battery according to claim 7, characterized in that, The inner surfaces of the first and second clamping plates are provided with limiting slots, and the inner surfaces of the first and second clamping plates are provided with rubber pads. The outer surface of the rubber pads is integrally formed with limiting strips, and the limiting strips are adhered to the inside of the limiting slots.