SOFC (Solid Oxide Fuel Cell) stack compression amount testing device

Abstract

The utility model discloses an SOFC (Solid Oxide Fuel Cell) stack compression amount testing device which comprises a controller, a compression supporting mechanism and a compression testing mechanism, the compression testing mechanism comprises a servo electric cylinder and a compression rod, the compression rod is suspended above a galvanic pile test piece, one end of the compression rod faces the galvanic pile test piece, the other end of the compression rod is connected with the servo electric cylinder, and the servo electric cylinder is fixedly connected to the compression supporting mechanism; the servo electric cylinder is connected with the controller; and when the servo electric cylinder drives the compression rod to press the galvanic pile test piece, after the compression rod is in contact with the galvanic pile test piece, the stroke change of the servo electric cylinder is the compression amount of the galvanic pile test piece. According to the scheme, the compression amount of the galvanic pile test piece is directly reflected through the stroke change of the servo electric cylinder, so that the test result of the compression amount of the galvanic pile is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of stack testing, and more specifically, to a device for testing the compression amount of a SOFC stack. Background Art

[0002] Solid Oxide Fuel Cell (SOFC) belongs to the third generation of fuel cells. With solid oxide as the electrolyte, it can directly convert chemical energy into electrical energy, featuring high power generation efficiency, wide fuel adaptability, and low carbon emissions. It has important application potential in fields such as portable power supplies, small household combined heat and power systems, and large static power stations.

[0003] The core component of an SOFC power generation system is a stack composed of several single cells. The quality of the stack performance directly determines the fate of the power generation system. After the SOFC stack is assembled, it needs to be sealed and compressed. Compression makes the contact between the single cells and the connectors closer, thereby reducing the contact resistance and improving the efficiency of internal electron transfer in the cells. After compressing the stack, the compression amount of the stack has a decisive impact on the internal electron transfer and gas transfer of the stack. Therefore, the compression amount has important reference significance for the design of the stack.

[0004] In the existing methods, the testing device generally compresses the stack by applying a certain pressure to the stack, but it cannot accurately compress the stack. If the compression amount is not accurately measured and the compression amount is too large, it will increase the gas transfer resistance inside the stack and affect the stack performance. Summary of the Utility Model

[0005] The utility model provides a device for testing the compression amount of a SOFC stack, which solves the problem that the existing device for testing the compression amount of a SOFC stack cannot accurately test the compression amount of the stack.

[0006] To achieve the above object, the technical solution provided by the utility model is as follows:

[0007] A device for testing the compression amount of a SOFC stack, characterized in that: it includes a controller, and also includes a compression support mechanism and a compression testing mechanism;

[0008] The compression testing mechanism includes a servo electric cylinder and a compression rod. The compression rod is suspended above the stack test piece, with one end facing the stack test piece and the other end connected to the servo electric cylinder. The servo electric cylinder is fixedly connected to the compression support mechanism; the servo electric cylinder is connected to the controller;

[0009] When the servo electric cylinder drives the compression rod to press against the fuel cell stack test piece, after the compression rod contacts the fuel cell stack test piece, the stroke change of the servo electric cylinder is the compression amount of the fuel cell stack test piece.

[0010] As a further improvement, the compression test mechanism further includes a pressure sensor, the pressure sensor is located between the servo electric cylinder and the compression rod, the upper side of the pressure sensor is connected to the servo electric cylinder, and the lower side is connected to the compression rod; and the pressure sensor is also electrically connected to the controller.

[0011] As a further improvement, an adapter is provided between the pressure sensor and the compression rod, the lower side of the pressure sensor is connected to the upper side of the adapter, and the lower side of the adapter is connected to the compression rod.

[0012] As an implementation, the compression rod is an insulating ceramic rod.

[0013] Furthermore, the compression test mechanism further includes an upper pressure plate disposed above the fuel cell stack test piece.

[0014] Furthermore, a groove is recessed on the upper side of the upper pressure plate for cooperating with the lower end of the compression rod.

[0015] Furthermore, the compression test mechanism further includes a lower pressure plate disposed below the fuel cell stack test piece, and the lower pressure plate is also located on the support platform for fixing the fuel cell stack test piece.

[0016] Furthermore, the compression support mechanism includes an upper fixing plate and a lower fixing plate, the servo electric cylinder is disposed on the upper fixing plate, the upper fixing plate is connected to the lower fixing plate through a first support column, and the lower fixing plate is connected to the support platform through a second support column.

[0017] Furthermore, the upper end of the second support column penetrates through the lower fixing plate, and an anti-loosening lock is threadedly connected to the upper end of the second support column.

[0018] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0019] (1) For a SOFC stack compression amount test device of the present invention, the compression test mechanism is fixedly connected to the compression support mechanism, the servo electric cylinder drives the compression rod to press against the fuel cell stack test piece, the servo electric cylinder drives the compression rod to have only an up-and-down stroke, and the compression amount of the fuel cell stack test piece is directly reflected by the stroke change of the servo electric cylinder, making the test result of the fuel cell stack compression amount more accurate.

[0020] (2) A SOFC stack compression amount testing device of the present utility model can obtain the pressure applied on the stack test piece through a pressure sensor, and can also establish the corresponding relationship between the stack compression amount and the pressure on it. By monitoring the compression amount of the stack and the pressure it receives in real time, on the one hand, the compression amount of the stack can be accurately obtained, and on the other hand, the test conditions can be adjusted in real time, providing a reference for the subsequent stack design.

[0021] (3) A SOFC stack compression amount testing device of the present utility model has an upper pressure plate above the stack test piece. The compression rod presses on the upper pressure plate, and the upper pressure plate compresses the stack test piece, making the compression rod press down on the stack test piece stably, and the stack test piece is more evenly stressed, improving the accuracy of the stack compression amount test.

[0022] (4) A SOFC stack compression amount testing device of the present utility model has one end of the first support column fixedly connected to the upper fixed plate and the other end fixedly connected to the lower fixed plate, and one end of the second support column fixedly connected to the lower fixed plate and the other end fixedly connected to the support platform, so that the compression support mechanism fixes and restricts the compression test mechanism, weakens the transmission of the reverse acting force of the stack test piece, strengthens the stability of the compression support mechanism, and enables the stroke of the servo electric cylinder to accurately reflect the compression amount of the stack test piece. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the SOFC stack compression amount testing device.

[0024] Label Description:

[0025] 1. Controller; 2. Servo electric cylinder; 3. Upper fixed plate; 4. First support column; 5. Pressure sensor; 6. Adapter; 7. Lower fixed plate; 8. Compression rod; 9. Second support column; 10. Upper pressure plate; 11. Stack test piece; 12. Lower pressure plate; 13. Support platform. Detailed Embodiment

[0026] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the drawings and embodiments.

[0027] The structures, proportions, sizes, etc. shown in the accompanying drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this utility model. At the same time, terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope in which the present invention can be implemented.

[0028] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned accompanying drawings of this application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of this application described herein.

[0029] As Figure 1 shown, this embodiment provides a SOFC stack compression amount testing device, which includes a controller 1, and also includes a compression support mechanism and a compression testing mechanism. The compression testing mechanism is fixedly connected to the compression support mechanism.

[0030] Specifically, the compression testing mechanism includes a servo electric cylinder 2 and a compression rod 8. The compression rod 8 is suspended above the stack test piece 11. The compression rod 8 is vertically arranged. One end below the compression rod 8 faces the stack test piece 11, and the upper end is connected to the servo electric cylinder 2. The servo electric cylinder 2 is connected to the controller 1. When the servo electric cylinder 2 drives the compression rod 8 to press against the stack test piece 11, after the compression rod 8 contacts the stack test piece 11, the stroke change of the servo electric cylinder 2 is the compression amount of the stack test piece 11.

[0031] In this embodiment, when performing stack compression testing, the servo electric cylinder 2 drives the compression rod 8 to press against the stack test piece 11. After the compression rod 8 contacts the stack test piece 11, the servo electric cylinder 2 drives the compression rod 8 to continue pressing against the stack test piece 11 to obtain the stroke change of the servo electric cylinder 2. The stroke change of the servo electric cylinder 2 is the compression amount of the stack test piece 11. This testing device directly reflects the compression amount of the stack test piece 11 according to the stroke change of the servo electric cylinder 2, making the test result of the stack compression amount more accurate and effectively avoiding overpressure of the stack, which may seriously affect the performance of the stack.

[0032] Furthermore, the compression test mechanism further includes a pressure sensor 5, which is located between the servo electric cylinder 2 and the compression rod 8. The upper side of the pressure sensor 5 is connected to the servo electric cylinder 2, and the lower side is connected to the compression rod 8. Moreover, the pressure sensor 5 is also electrically connected to the controller 1. The pressure sensor 5 can obtain the pressure exerted by the servo electric cylinder 2 driving the compression rod 8 towards the fuel cell stack test piece 11, and the pressure sensor 5 inputs this pressure to the controller 1, and the controller 1 can obtain the pressure borne by the fuel cell stack test piece 11.

[0033] In this embodiment, in order to improve the accuracy of the fuel cell stack compression amount, the controller 1 can adjust the stroke accuracy of the servo electric cylinder 2, and set the minimum unit of the stroke of the servo electric cylinder 2 to 0.001 mm. During the test, the pressure applied to the fuel cell stack test piece 11 can be obtained through the pressure sensor 5, and the corresponding relationship between the fuel cell stack compression amount and the pressure can also be established. By monitoring the compression amount of the fuel cell stack and the pressure it receives in real time, on the one hand, the compression amount of the fuel cell stack can be accurately obtained, and on the other hand, the test conditions can be adjusted in real time, providing a reference for the subsequent fuel cell stack design.

[0034] The telescopic part of the servo electric cylinder 2 in the compression test mechanism is connected to the pressure sensor 5, enabling the pressure sensor 5 to directly obtain the pressure exerted by the compression rod 8 due to the stroke change of the servo electric cylinder 2. A adapter 6 is provided between the pressure sensor 5 and the compression rod 8 to facilitate the connection between the pressure sensor 5 and the compression rod 8. The lower side of the pressure sensor 5 is connected to the upper side of the adapter 6, and the lower side of the adapter 6 is connected to the compression rod 8.

[0035] The compression rod 8 is an insulating ceramic rod. The compression rod 8 is made of insulating material, which can avoid the influence of the compression rod 8 on the fuel cell stack and electrical equipment. The compression rod 8 is a ceramic rod, which can withstand high temperatures and enable the test of the fuel cell stack test piece 11 in a high-temperature environment.

[0036] As a further improvement, the compression test mechanism further includes an upper pressure plate 10 provided above the fuel cell stack test piece 11. A groove is recessed on the upper side of the upper pressure plate 10 for cooperating with the lower end of the compression rod 8. The compression test mechanism further includes a lower pressure plate 12 provided below the fuel cell stack test piece 11, and the lower pressure plate 12 is also located on the support platform 13 for fixing the fuel cell stack test piece 11.

[0037] The upper pressure plate 10 is located directly below the compression rod 8. The upper pressure plate 10 is fixed to the upper side of the fuel cell test piece 11, and the fuel cell test piece 11 is fixedly installed on the lower pressure plate 12 to fix the fuel cell test piece 11 and prevent the fuel cell test piece 11 from shifting during the test, which may affect the accuracy of the test. By setting the upper pressure plate 10, the compression rod 8 presses on the upper pressure plate 10, and the upper pressure plate 10 compresses the fuel cell test piece 11, making the compression of the fuel cell test piece 11 by the compression rod 8 stable and the fuel cell test piece 11 evenly stressed, thereby improving the accuracy of the compression test. The groove on the upper pressure plate 10 that matches the lower end of the compression rod 8 can ensure the stability of the contact between the compression rod 8 and the upper pressure plate 10, further improving the test accuracy.

[0038] The compression support mechanism includes an upper fixing plate 3 and a lower fixing plate 7. The servo electric cylinder 2 is fixedly arranged on the upper fixing plate 3. The upper fixing plate 3 is connected to the lower fixing plate 7 through the first support column 4, and the lower fixing plate 7 is connected to the support platform 13 through the second support column 9. A plurality of first support columns 4 and second support columns 9 are provided to ensure the stable connection of the upper fixing plate 3 and the lower fixing plate 7. The support platform 13 is arranged on the control cabinet, and the controller 1 is arranged in the control cabinet. By fixing, restricting, and supporting the compression test mechanism through the compression support mechanism, it can be ensured that the compression rod 8 can only have a stroke of moving up and down, which is convenient to operate and further improves the stability of the compression rod 8 compressing the fuel cell test piece 11.

[0039] Furthermore, the upper end of the second support column 9 penetrates the lower fixing plate 7, and the upper end of the second support column 9 is threadedly connected with an anti-loosening lock. By using the anti-loosening lock to maintain the fixed connection between the second support column 9 and the lower fixing plate 7 and locking the lower fixing plate 9 at the top of the second support column 9, the transmission of the reverse acting force of the fuel cell test piece 11 can be weakened, the stability of the compression support mechanism can be enhanced, and the stroke of the servo electric cylinder 2 can accurately reflect the compression amount of the fuel cell test piece 11.

[0040] The terms "installed", "set", "provided with", and "connected" referred to herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The above schematically describes the present invention and its embodiments. This description is not restrictive, and only one of the embodiments of the present invention is shown in the drawings. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural methods and embodiments without creative efforts without departing from the gist of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A SOFC stack compression amount testing device, characterized in that: It includes a controller (1), and also includes a compression support mechanism and a compression test mechanism; The compression test mechanism includes a servo electric cylinder (2) and a compression rod (8). The compression rod (8) is suspended above the fuel cell test piece (11), with one end facing the fuel cell test piece (11) and the other end connected to the servo electric cylinder (2). The servo electric cylinder (2) is fixedly connected to the compression support mechanism; the servo electric cylinder (2) is connected to the controller (1); When the servo electric cylinder (2) drives the compression rod (8) to press against the fuel cell test piece (11), after the compression rod (8) contacts the fuel cell test piece (11), the stroke change of the servo electric cylinder (2) is the compression amount of the fuel cell test piece (11).

2. The SOFC stack compression amount testing device according to claim 1, wherein: The compression test mechanism further includes a pressure sensor (5). The pressure sensor (5) is located between the servo electric cylinder (2) and the compression rod (8). The upper side of the pressure sensor (5) is connected to the servo electric cylinder (2), and the lower side is connected to the compression rod (8); and the pressure sensor (5) is also electrically connected to the controller (1).

3. The SOFC stack compression amount testing device according to claim 2, wherein: A adapter (6) is arranged between the pressure sensor (5) and the compression rod (8). The lower side of the pressure sensor (5) is connected to the upper side of the adapter (6), and the lower side of the adapter (6) is connected to the compression rod (8).

4. The SOFC stack compression amount testing device according to claim 1, wherein: The compression rod (8) is an insulating ceramic rod.

5. The SOFC stack compression amount testing device according to any one of claims 1-4, characterized in that: The compression test mechanism further includes an upper pressure plate (10) arranged above the fuel cell test piece (11).

6. The SOFC stack compression amount testing device according to claim 5, characterized in that: A groove is recessed on the upper side of the upper pressure plate (10) for cooperating with the lower end of the compression rod (8).

7. The SOFC stack compression amount testing device according to claim 5, wherein: The compression test mechanism further includes a lower pressure plate (12) arranged below the fuel cell test piece (11), and the lower pressure plate (12) is also located on the support platform (13) for fixing the fuel cell test piece (11).

8. The SOFC stack compression amount testing device according to claim 7, characterized in that: The compression support mechanism includes an upper fixing plate (3) and a lower fixing plate (7). The servo electric cylinder (2) is arranged on the upper fixing plate (3). The upper fixing plate (3) is connected to the lower fixing plate (7) through a first support column (4), and the lower fixing plate (7) is connected to the support platform (13) through a second support column (9).

9. The SOFC stack compression amount testing device according to claim 8, characterized in that: The upper end of the second support column (9) penetrates through the lower fixing plate (7), and the upper end of the second support column (9) is threadedly connected with an anti-loosening lock catch.

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