A high-universality fuel cell stack voltage acquisition device

Abstract

The application relates to a high-universality fuel cell stack voltage acquisition device which is an auxiliary device connected between a bipolar plate and an inspection controller, the device comprising a connecting mechanism connected between the bipolar plate and the inspection controller and a supporting mechanism supporting the connecting mechanism; the connecting mechanism is provided with pickup contacts contacting the bipolar plate and voltage harness leads connected with the pickup contacts, and the voltage harness leads are further connected with the inspection controller. The connecting mechanism is fixed on a convex track on the supporting mechanism through a groove and a clamping sliding block, and both ends of the supporting mechanism are further provided with fixed terminals for prolonging the length of a horizontal rod and fixing the supporting mechanism and the bipolar plate. Compared with the prior art, the device is reliable and stable in structure, simple in installation method, good in flexibility, high in universality, and can effectively solve the problem of unstable test data caused by vibration and accidental touch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cell stack device, and particularly relates to a high-universality fuel cell stack voltage acquisition device. BACKGROUND

[0002] Fuel cell is a chemical power generation device which generates electricity by hydrogen and oxygen reaction, and generates water and heat. Proton exchange membrane fuel cell has the characteristics of high power density, low working temperature and high maturity, and is considered as the most likely fuel cell to be first commercially applied. Along with extensive demonstration operation of vehicles, many fuel cells with different powers and different designs appear in the market. The types of fuel cell stacks include metal bipolar plate fuel cell stack, composite graphite bipolar plate fuel cell stack and flexible graphite bipolar plate fuel cell.

[0003] Fuel cell is generally composed of tens, hundreds or even hundreds of single-layer stacks in series. Due to the difference in design and manufacturing, the performance of each layer will also show difference in the running process. In order to monitor the voltage of each layer, a single-layer voltage detection device is generally needed to be introduced. For the increasingly thin bipolar plate and single-layer design, the voltage acquisition device connected with the bipolar plate and the voltage detection controller becomes more and more important. The acquisition device generally requires good anti-vibration, corrosion resistance, small space short-circuit prevention, good connection with the bipolar plate and other characteristics.

[0004] In existing fuel cell stack voltage acquisition devices, there are generally two ways: the first is to use a mechanical structure device, which uses elastic components to connect the bipolar plate and is connected to the optional controller. CN214313271U discloses a fuel cell voltage detection structure and a bipolar plate and a fuel cell having the same, which installs a conductive sheet in the mounting groove of the bipolar plate and exposes part of the bipolar plate for connection with the voltage test connector for detection. CN113093028A discloses a connection mechanism, connector and detection device for fuel cell pole piece detection, which realizes the staggered insertion of adjacent connectors by staggered arrangement of the port and the shell, ensuring that each pole piece can be detected. CN114545244A discloses a patrol inspection assembly, which directly connects with a single section and a detection component through an integrally formed injection molding, spring pin and sampling wire harness, ensuring stable voltage signal acquisition. CN214280019U discloses a bipolar plate of a fuel cell, a patrol inspection plug-in and a fuel cell stack, which improves the patrol inspection accuracy by inserting the contact part with the conductive clamp into the insertion slot of the patrol inspection plug-in. CN110323463A discloses a fuel cell bipolar plate and a fuel cell voltage patrol inspection plug-in, which provides a bipolar plate with a patrol inspection plug-in connection structure that is easy to install and disassemble and stable and reliable in connection, so that after the patrol inspection plug-in is inserted into the patrol inspection plug-in connection structure, the voltage of each section of the stack can be detected. The second is to use conductive materials such as conductive silver paste to directly bond the side surface of the bipolar plate with the wire (such as the HD30 product of Hydrogenics), or to connect the metal plate with the wire by welding.

[0005] However, the existing fuel cell stack voltage acquisition device mainly solves the connection between the patrol controller and the bipolar plate in a small space, thus sacrificing its flexibility and versatility. In the scenario of testing multiple different types and lengths of stacks, such as third-party testing of fuel cell stacks, the flexibility and versatility of the fuel cell stack voltage acquisition device are required to be higher, and the same device cannot meet the voltage testing needs of multiple fuel cell stacks. Therefore, a high-universal fuel cell stack voltage acquisition device is needed to complete the voltage detection of the fuel cell stack. SUMMARY

[0006] The purpose of the present application is to overcome the defects of poor flexibility and low versatility of the existing technology and to provide a high-universal fuel cell stack voltage acquisition device.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] The technical scheme of the present application provides a high-universality fuel cell stack voltage acquisition device, which is an auxiliary device connected between a bipolar plate and a patrol controller, the device comprising a connecting mechanism connected between the bipolar plate and the patrol controller, and a supporting mechanism supporting the connecting mechanism;

[0009] The connecting mechanism comprises a connecting mechanism body, an upper and lower cavity is arranged on the connecting mechanism body, a pickup contact is arranged in the cavity, one end of the pickup contact is in contact with the bipolar plate, and the other end is connected with a voltage harness lead, the voltage harness lead is also connected with the patrol controller; a downwardly open groove is further arranged beside the cavity on the connecting mechanism body;

[0010] The supporting mechanism comprises a horizontal rod and a fixed terminal, a protruding track is arranged on the upper side of the horizontal rod and matched with the groove on the connecting mechanism body, a groove is arranged on the lower side of the horizontal rod and matched with the fixed terminal, and locking parts are further arranged on both ends of the horizontal rod and used for fixing the horizontal rod and the fixed terminal;

[0011] A slot is arranged on the fixed terminal and penetrates the fixed terminal from top to bottom, when the fixed terminal is inserted into the groove on the lower side of the horizontal rod, the locking parts are inserted into and locked with the slot, and the horizontal rod and the fixed terminal are fixed; a bolt is further arranged on one end of the fixed terminal and used for fixing the supporting mechanism and the bipolar plate.

[0012] Further, a first cavity is further arranged on the inner wall of the groove and penetrates the side wall of the connecting mechanism body, a clamping sliding block is arranged in the first cavity, a clamping sliding block spring is further arranged on the clamping sliding block, under the elastic force of the clamping sliding block spring, the clamping sliding block is close to the groove and extends out of the first cavity to abut against the protruding track.

[0013] Further, a second cavity is further arranged above the first cavity and penetrates the top of the connecting mechanism body, a limiting block integrated with the clamping sliding block is arranged in the second cavity, the width of the limiting block is smaller than the width of the second cavity, when the limiting block is pulled away from the groove, the groove and the protruding track are relatively free.

[0014] Further, a harness connecting port is arranged at the connection between the pickup contact and the voltage harness lead.

[0015] Further, a pickup contact spring is further arranged on the pickup contact, under the elastic force of the pickup contact spring, the pickup contact is in abutting contact with the bipolar plate.

[0016] Further, the fixed terminal is L-shaped structure, comprising a first bending part and a second bending part integrally connected with the first bending part, the slot is arranged on the first bending part, and the hole for the bolt is arranged on the second bending part.

[0017] Further, the second bending part is downwardly arranged, and the support mechanism is fastened with the outer side wall of the bipolar plate through the bolt on the second bending part.

[0018] Further, the gas inlet end plate and the rear end plate are arranged on the outer side of the two ends of the bipolar plate, when the gas inlet end plate and the rear end plate are higher than the bipolar plate, the second bending part is upwardly arranged, and the support mechanism is fastened with the inner side wall of the gas inlet end plate and the rear end plate through the bolt on the second bending part.

[0019] Further, when the gas inlet end plate and the rear end plate are the same height as the bipolar plate, the second bending part is downwardly arranged, and the support mechanism is fastened with the outer side wall of the gas inlet end plate and the rear end plate through the bolt on the second bending part.

[0020] Further, the fixed terminal is provided with two.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] (1) By installing multiple sets of the present application on the same electric pile, the voltage of each bipolar plate is detected at multiple sites.

[0023] (2) The device of the present application realizes connection path by mechanical stress, without damaging the bipolar plate.

[0024] (3) The present application has good flexibility and high universality, the length of the horizontal rod is extended through the fixed terminal to meet the voltage detection of electric piles of different thicknesses, and is also suitable for the voltage detection of different types of electric piles, including metal plate electric piles and graphite plate electric piles.

[0025] (4) The device structure of the present application is reliable and stable, the installation method is simple, and the problem of unstable test data caused by vibration and accidental touch is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the whole device of the present application.

[0027] Figure 2 It is a schematic diagram of the connecting mechanism.

[0028] Figure 3 It is a schematic diagram of the internal structure of the connecting mechanism.

[0029] Figure 4 It is a schematic diagram of the cross section of the connecting mechanism.

[0030] Figure 5 Fig. 1 is a schematic view of the support mechanism.

[0031] Figure 6 Fig. 2 is an exploded schematic view of the support mechanism.

[0032] Figure 7 Fig. 3 is a schematic view of the structure of the support mechanism fixed inside the air inlet end plate and the rear end plate.

[0033] Figure 8 Fig. 4 is a schematic view of the structure of the support mechanism fixed outside the air inlet end plate and the rear end plate.

[0034] The figures are identified as follows:

[0035] 1 - air inlet end plate; 2 - rear end plate; 3 - support mechanism; 4 - connecting mechanism; 5 - crossbar; 6 - locking component; 7 - fixed terminal; 701 - first bending part; 702 - second bending part; 8 - connecting mechanism body; 9 - voltage harness lead; 10 - harness connecting port; 11 - pickup contact spring; 12 - pickup contact; 13 - clamping slider; 14 - clamping slider spring; 15 - limiting block. DETAILED DESCRIPTION

[0036] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] In the following embodiments, the functional components or structures not specifically described are all conventional components or conventional structures adopted in the field to achieve the corresponding functions.

[0038] Embodiment 1:

[0039] As shown in Fig. 1, it is a high-universality fuel cell stack voltage acquisition device. As an auxiliary device connecting the bipolar plate and the patrol controller, the device comprises a connecting mechanism 4 connecting the bipolar plate and the patrol controller, and a support mechanism 3 supporting the connecting mechanism 4. Figures 1-6 As shown in Fig. 2, the connecting mechanism 4 comprises a connecting mechanism body 8, and an upper and lower cavity penetrating through the connecting mechanism body 8. A pickup contact 12 is arranged in the cavity, and a pickup contact spring 11 is further arranged on the pickup contact 12. One end of the pickup contact 12 contacts the bipolar plate, and the other end is connected with a voltage harness lead 9 through a harness connecting port 10. Under the elastic force of the pickup contact spring 11, the pickup contact 12 is in close contact with the bipolar plate. The voltage harness lead 9 is further connected with the patrol controller. A downwardly open groove is further arranged beside the cavity on the connecting mechanism body 8.

[0040] Figures 2-4

[0041] ​​The inner wall of the groove on the connecting mechanism body 8 is also provided with a first cavity penetrating the side wall of the connecting mechanism body 8, and the first cavity is provided with a clamping sliding block 13, and the clamping sliding block 13 is further wound with a clamping sliding block spring 14. Under the elastic force of the clamping sliding block spring 14, the clamping sliding block 13 is close to the groove and extends out of the first cavity to abut against the protruding track, so as to realize the fixation between the connecting mechanism and the supporting mechanism. Above the first cavity, a second cavity penetrating the top of the connecting mechanism body 8 is further provided, and the second cavity is provided with a limiting block 15 integrated with the clamping sliding block 13. The width of the limiting block 15 is smaller than the width of the second cavity, so as to satisfy the space for the movement of the limiting block 15. When the limiting block 15 is pulled away from the side of the groove, the groove can be relatively freely moved on the protruding track, so as to realize the separation between the connecting mechanism and the supporting mechanism.

[0042] As shown in Figures 5-6 The supporting mechanism 3 includes a cross rod 5 and two fixed terminals 7 located at both ends of the cross rod 5. The upper portion of the cross rod 5 is provided with a protruding track matched with the groove on the connecting mechanism body 8. The lower portion of the cross rod 5 is provided with a groove matched with the fixed terminal 7. The two ends of the cross rod 5 are further provided with a locking part 6 for fixing the cross rod 5 and the fixed terminal 7. The fixed terminal 7 is in an L-shaped structure, including a first bent part 701 and a second bent part 702 integrated with the first bent part 701. The first bent part 701 is provided with a slot hole. The second bent part 702 is provided with a hole for a bolt to pass through. When the second bent part 702 is arranged downward and the first bent part 701 is inserted into the groove below the cross rod 5, the locking part 6 is inserted into the slot hole. The position of the locking part 6 in the slot hole is adjusted according to the thickness of the bipolar plate. The cross rod 5 and the fixed terminal 7 are locked by the bolt on the locking part 6. When the bolt on the second bent part 702 at both ends of the cross rod 5 is tightened to abut against the outer side wall of the bipolar plate, the fixation between the supporting mechanism 3 and the bipolar plate is realized.

[0043] In summary, the voltage acquisition device of the fuel cell stack with high universality in the embodiment is fixed outside the fuel cell stack composed of bipolar plates. The detection of voltage is completed by contacting the bipolar plate through the pickup contact 12 and connecting the patrol controller through the voltage harness lead 9.

[0044] Embodiment 2:

[0045] As shown in Figure 7 Most of the embodiment 1 is the same, and the difference is that the gas inlet end plate 1 and the rear end plate 2 are respectively arranged outside both ends of the bipolar plate. When the gas inlet end plate 1 and the rear end plate 2 are higher than the bipolar plate, the second bent part 702 is arranged upward, the first bent part 701 is inserted into the groove below the cross rod 5, and the bolt on the second bent part 702 is tightened to abut against the inner side wall of the gas inlet end plate 1 and the rear end plate 2, so as to realize the fixation between the supporting mechanism 3 and the gas inlet end plate 1 and the rear end plate 2.

[0046] The voltage collection device of the fuel cell stack of the embodiment is fixed on the inner side of the fuel cell stack composed of bipolar plates, and the voltage detection is completed by the pickup contact 12 contacting the bipolar plates and the voltage harness lead 9 connecting the patrol controller.

[0047] Embodiment 3

[0048] As shown in Figure 8 The second bending part 702 is set downward, the first bending part 701 is inserted into the channel under the horizontal rod 5, and the bolt on the second bending part 702 is screwed against the outer side wall of the gas inlet end plate 1 and the rear end plate 2 to realize the fixation of the support mechanism 3 and the gas inlet end plate 1 and the rear end plate 2.

[0049] The voltage collection device of the fuel cell stack of the embodiment is fixed on the inner side of the fuel cell stack composed of bipolar plates, and the voltage detection is completed by the pickup contact 12 contacting the bipolar plates and the voltage harness lead 9 connecting the patrol controller.

[0050] The above description of the embodiments is for facilitating the understanding and use of the invention by ordinary skilled in the art. Those skilled in the art can easily make various modifications to the embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art according to the disclosure of the invention without departing from the scope of the invention should be within the protection scope of the invention.

Claims

1. A high versatility fuel cell stack voltage acquisition device, as an auxiliary device connected between a bipolar plate and a patrol controller, characterized in that, The device comprises a connecting mechanism (4) connecting the bipolar plate and the patrol controller, and a supporting mechanism (3) supporting the connecting mechanism (4); The connecting mechanism (4) comprises a connecting mechanism body (8) provided with a cavity penetrating from top to bottom, a pickup contact (12) is arranged in the cavity, one end of the pickup contact (12) is in contact with the bipolar plate, and the other end is connected with a voltage harness lead wire (9), the voltage harness lead wire (9) is also connected with the patrol controller, and a downwardly opened groove is further arranged beside the cavity on the connecting mechanism body (8); The supporting mechanism (3) comprises a cross rod (5) and a fixed terminal (7), a convex track is arranged on the upper portion of the cross rod (5) and matched with the groove on the connecting mechanism body (8), a groove is arranged on the lower portion of the cross rod (5) and matched with the fixed terminal (7), and locking parts (6) are arranged on both ends of the cross rod (5) and used for fixing the cross rod (5) and the fixed terminal (7); A slot penetrating from top to bottom is arranged on the fixed terminal (7), when the fixed terminal (7) is inserted into the groove below the cross rod (5), the locking parts (6) are inserted into and locked with the slot to fix the cross rod (5) and the fixed terminal (7), and a bolt is arranged on one end of the fixed terminal (7) and used for fixing the supporting mechanism (3) and the bipolar plate.

2. The high-universal fuel cell stack voltage acquisition device according to claim 1, characterized in that, A first cavity penetrating the side wall of the connecting mechanism body (8) is further arranged on the inner wall of the groove, a clamping sliding block (13) is arranged in the first cavity, a clamping sliding block spring (14) is further arranged on the clamping sliding block (13), under the elastic force of the clamping sliding block spring (14), the clamping sliding block (13) is close to the groove and extends out of the first cavity to abut against the convex track.

3. The high-universal fuel cell stack voltage acquisition device according to claim 2, characterized in that, A second cavity penetrating the top of the connecting mechanism body (8) is further arranged above the first cavity, a limiting block (15) integrated with the clamping sliding block (13) is arranged in the second cavity, the width of the limiting block (15) is smaller than the width of the second cavity, when the limiting block (15) is pulled away from the groove, the groove and the convex track are relatively free.

4. The high-universal fuel cell stack voltage acquisition device according to claim 1, characterized in that, A harness connecting port (10) is arranged at the connection position of the pickup contact (12) and the voltage harness lead wire (9).

5. The high versatility fuel cell stack voltage acquisition device according to claim 1, characterized by, A pickup contact spring (11) is further arranged on the pickup contact (12), under the elastic force of the pickup contact spring (11), the pickup contact (12) is in abutting contact with the bipolar plate.

6. The high versatility fuel cell stack voltage acquisition device according to claim 1, characterized by The fixed terminal (7) is in L-shaped structure, comprising a first bending part (701) and a second bending part (702) integrated with the first bending part (701), the slot is arranged on the first bending part (701), and a hole is arranged on the second bending part (702) and used for the bolt.

7. The high-universal fuel cell stack voltage acquisition device according to claim 6, characterized in that, The second bending part (702) is arranged downwardly, the bolt on the second bending part (702) is used for fastening the outer side wall of the supporting mechanism (3) and the bipolar plate.

8. The high versatility fuel cell stack voltage acquisition device according to claim 6, characterized by The gas inlet end plate (1) and the rear end plate (2) are further arranged outside the two ends of the bipolar plate, when the gas inlet end plate (1) and the rear end plate (2) are higher than the second bending part (702), the second bending part (702) is arranged upward, the support mechanism (3) is fastened with the inner side wall of the gas inlet end plate (1) and the rear end plate (2) through the bolt on the second bending part (702).

9. The high-universal fuel cell stack voltage acquisition device according to claim 8, characterized in that, When the gas inlet end plate (1) and the rear end plate (2) are level with the second bending part (702), the second bending part (702) is arranged downward, the support mechanism (3) is fastened with the outer side wall of the gas inlet end plate (1) and the rear end plate (2) through the bolt on the second bending part (702).

10. The high-universal fuel cell stack voltage acquisition device according to claim 8, characterized in that, The fixed terminal (7) is provided with two.

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