Connecting device for galvanic pile test

Abstract

The utility model relates to a connecting device for galvanic pile test, which comprises test equipment, a galvanic pile and a quick connecting device, the test equipment is provided with a first hydrogen inlet and outlet pipe fitting, a first oxygen inlet and outlet pipe fitting and a first cooling water inlet and outlet pipe fitting; the electric pile is provided with a second hydrogen inlet and outlet pipe fitting, a second oxygen inlet and outlet pipe fitting and a second cooling water inlet and outlet pipe fitting, and the quick connecting device comprises a base, a third hydrogen inlet and outlet pipe fitting, a third oxygen inlet and outlet pipe fitting, a third cooling water inlet and outlet pipe fitting and a toggle clamp mechanism; one free tail end of the third cooling water inlet and outlet pipe fitting is in butt joint with the second cooling water inlet and outlet pipe fitting, the other free tail end of the third cooling water inlet and outlet pipe fitting is connected with a self-sealing quick-plug connector, and the self-sealing quick-plug connector is connected with one free tail end of a third hose through a third fixing piece; and the other free tail end of the third hose is connected with the first cooling water inlet and outlet pipe fitting through a fourth fixing piece, so that the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, in particular to a connecting device for stack testing.

Background Art

[0002] In order to ensure the manufacturing quality of fuel cells, the fuel cell stack needs to be connected to a test bench for stack activation testing and performance testing after manufacturing. To improve the test efficiency and reduce the connection time between the fuel cell and the test equipment, a quick connection device is generally used. Referring to the existing literature (Patent Application No. 202120638662.7), it discloses a quick connection device for stack testing, including a test equipment. A first hydrogen, air, and cooling water inlet and outlet pipe fitting is fixedly connected to the front end of the test equipment. A connection mechanism is fixedly installed at the front end of the first hydrogen, air, and cooling water inlet and outlet pipe fitting. A guide rail is arranged below the front of the test equipment. A baffle is fixedly connected to the rear end of the guide rail. A locking hole is formed in the middle of the guide rail. A quick connection device is arranged on the front side of the guide rail. A second hydrogen, air, and cooling water inlet and outlet pipe fitting is fixedly connected to the rear end of the quick connection device. A rubber tube is fixedly connected to the rear end of the second hydrogen, air, and cooling water inlet and outlet pipe fitting. A fuel cell is arranged at the upper end of the quick connection device. A fixing rod is fixedly connected to the lower end of the quick connection device. A roller is fixedly installed at the lower end of the fixing rod. A fixator is arranged above the roller at the lower front side of the fixing rod. The defects of this kind of quick connection device are as follows: 1. The quick connection device is connected to the stack by a rubber tube, which greatly increases the connection time and reduces the work efficiency; 2. The first hydrogen, air, and cooling water inlet and outlet pipe fitting on the test equipment is connected to the second hydrogen, air, and cooling water inlet and outlet pipe fitting on the quick connection device by a clamp. After the previous stack test is completed, the clamp needs to be loosened to separate the first hydrogen, air, and cooling water inlet and outlet pipe fitting on the test equipment from the second hydrogen, air, and cooling water inlet and outlet pipe fitting on the quick connection device. The defect of this kind of structure is that the loosening of the clamp will cause the residual cooling water in the interface to flow to the ground, which not only causes waste of water resources, but also makes the ground slippery and forms a safety hazard.

[0003] Therefore, it is necessary to provide a connecting device for stack testing to solve the above technical problems.

Content of the Utility Model

[0004] To solve the above problems, the purpose of the utility model is to provide a connecting device for stack testing that can greatly improve the test efficiency.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a connection device for testing a fuel cell stack, comprising: a test device, a fuel cell stack and a quick-connect device, wherein the test device is provided with a first hydrogen inlet and outlet pipe fitting, a first oxygen inlet and outlet pipe fitting and a first cooling water inlet and outlet pipe fitting, and the fuel cell stack is provided with a second hydrogen inlet and outlet pipe fitting, a second oxygen inlet and outlet pipe fitting and a second cooling water inlet and outlet pipe fitting, and the quick-connect device comprises a base, a third hydrogen inlet and outlet pipe fitting, a third oxygen inlet and outlet pipe fitting, a third cooling water inlet and outlet pipe fitting and a plurality of toggle clamp mechanisms for locking the quick-connect device and the fuel cell stack, the third hydrogen inlet and outlet pipe fitting is penetrated in the base, one of the free ends of the third hydrogen inlet and outlet pipe fitting is connected to the second hydrogen inlet and outlet pipe fitting of the fuel cell stack, the other free end of the third hydrogen inlet and outlet pipe fitting protrudes out of the base and is connected to the first hydrogen inlet and outlet pipe fitting on the test device through a first hose, and the first hose and the third hydrogen inlet and outlet pipe fitting and the first hydrogen inlet and outlet pipe fitting are respectively connected through first fixing members The third oxygen inlet and outlet pipe fitting is provided in the base, one of the free ends of the third oxygen inlet and outlet pipe fitting is connected with the second oxygen inlet and outlet pipe fitting of the stack, the other free end of the third oxygen inlet and outlet pipe fitting protrudes out of the base and is connected with the first oxygen inlet and outlet pipe fitting on the test equipment through a second hose, the second hose is connected with the third oxygen inlet and outlet pipe fitting and the first oxygen inlet and outlet pipe fitting respectively through a second fixing piece, the third cooling water inlet and outlet pipe fitting is provided in the base, one of the free ends of the third cooling water inlet and outlet pipe fitting is connected with the second cooling water inlet and outlet pipe fitting of the stack, the other free end of the third cooling water inlet and outlet pipe fitting protrudes out of the base and is connected with a self-sealing quick-plug connector, the self-sealing quick-plug connector is connected with one of the free ends of the third hose through a third fixing piece, the other free end of the third hose is connected with the first cooling water inlet and outlet pipe fitting on the test equipment through a fourth fixing piece, and a plurality of toggle clamp mechanisms are arranged around the base.

[0006] Preferably, a connection device for stack testing in the present utility model is further configured as follows: The self-sealing quick-connect fitting includes a first interface assembly and a second interface assembly. The first interface assembly includes a first interface main body, a first core, a first sealing plug, a first spring, a ball bracket, a plurality of balls, a lock sleeve, and a second spring. The first interface main body is provided with a first step portion. The first core is disposed within the first interface main body, and an end of the first core abuts against the first step portion of the first interface main body. The first sealing plug is disposed within the first core. The first sealing plug includes a first spring abutting portion, a first sealing mating portion, and a first pair of top portions. A plurality of first through holes are provided on the first spring abutting portion. The first core is provided with a second step portion. The first spring is disposed between the first spring abutting portion of the first sealing plug and the second step portion of the first core. The first core is provided with a second sealing mating portion that mates with the first sealing mating portion of the first sealing plug. The first core is provided with an installation groove for installing the ball bracket. The ball bracket is elastically clamped within the installation groove. A plurality of balls are installed within the ball bracket. The first core is provided with a plurality of ball receiving holes that mate with the balls. The lock sleeve is disposed outside the first interface main body and the first core. The second spring is sleeved on the first core and is located between the lock sleeve and the first interface main body. The first core is provided with a first limiting step portion. The lock sleeve is provided with a second limiting step portion that mates with the first limiting step portion. The second interface assembly includes a second interface main body, a second core, a second sealing plug, and a third spring. The second interface main body and the second core are threadedly connected. The second sealing plug is disposed within the second core. The second sealing plug includes a second spring abutting portion, a third sealing mating portion, and a second pair of top portions. A plurality of second through holes are provided on the second spring abutting portion. The second pair of top portions of the second sealing plug mates with the first pair of top portions of the first sealing plug. The second interface main body is provided with a third step portion. The third spring is disposed between the third step portion of the second interface main body and the second spring abutting portion of the second sealing plug. The inner side of the second core is provided with a fourth sealing mating portion that mates with the third sealing mating portion of the second sealing plug. The outer side of the second core is provided with a card slot that mates with the balls.

[0007] Preferably, a connection device for stack testing in the present utility model is further configured as follows: When the first interface assembly and the second interface assembly are docked, the balls of the first interface assembly are snapped into the card slots of the second interface assembly, and the first pair of top portions of the first interface assembly and the second pair of top portions of the second interface assembly abut against each other, thereby forming a first cooling water flow gap between the second sealing mating portion of the first core and the first sealing mating portion of the first sealing plug, and forming a second cooling water flow gap between the fourth sealing mating portion of the second core and the third sealing mating portion of the second sealing plug.

[0008] Preferably, a connection device for stack testing in the present utility model is further configured such that when the first interface assembly and the second interface assembly are disconnected, the second sealing mating portion of the first core body is closely attached to the first sealing mating portion of the first sealing plug to achieve sealing, and the fourth sealing mating portion of the second core body is closely attached to the third sealing mating portion of the second sealing plug to achieve sealing.

[0009] Preferably, a connection device for stack testing in the present utility model is further configured such that among the first interface assembly and the second interface assembly, one is threadedly connected to the third cooling water inlet and outlet pipe fitting, and the other is connected to the third hose through a clamp.

[0010] Preferably, a connection device for stack testing in the present utility model is further configured such that the first fixing member, the second fixing member, the third fixing member, and the fourth fixing member are all clamps.

[0011] Preferably, a connection device for stack testing in the present utility model is further configured such that the elbow clamp mechanism includes: a support, a pull rod, a connecting rod, an adjusting bolt, a handle, and a stack end plate pressing plate. The support includes a mounting portion mounted on the quick-connect device, a connecting portion connected to the handle, and a sleeve portion through which the pull rod passes. The mounting portion of the support is connected to the quick-connect device through a plurality of fifth fixing members. The connecting portion of the support and the handle are connected through a first rotating shaft. The pull rod is disposed within the sleeve portion of the support and can move axially along the sleeve portion of the support. One free end of the connecting rod is connected to the handle through a second rotating shaft, and the other free end of the connecting rod is connected to one free end of the pull rod through a third rotating shaft. A nut cooperating with the adjusting bolt is welded to the other free end of the pull rod, and the stack end plate pressing plate is sleeved on the adjusting bolt.

[0012] Preferably, a connection device for stack testing in the present utility model is further configured such that the fifth fixing member is a bolt.

[0013] Preferably, a connection device for stack testing in the present utility model is further configured such that the stack end plate pressing plate cooperates with the end plate on the stack.

[0014] Compared with the prior art, the utility model has the following beneficial effects: by improving the hose connection structure between the fuel cell stack and the quick-connect device in the prior art into an elbow clamp connection structure, the utility model greatly reduces the connection time of the device during testing, thus improving the work efficiency. In addition, the utility model is provided with a self-sealing quick connector at the free end of the third cooling water inlet and outlet pipe fitting. Through the docking and disconnection of the quick connector, the connection and disconnection of the third cooling water inlet and outlet pipe fitting and the first cooling water inlet and outlet pipe fitting can be completed, without the need to operate the clamp as in the prior art, so the work efficiency is also greatly improved. In addition, since the quick connector in the utility model is a self-sealing quick connector, when it is disconnected, the residual water in the interface will be retained in the interface respectively, thus avoiding the cooling water flowing to the ground and causing potential safety hazards.

Description of Drawings

[0015] Figure 1 It is a schematic structural diagram of the connection device for fuel cell stack testing in the utility model.

[0016] Figure 2 It is a schematic structural diagram of the quick-connect device and the fuel cell stack in the utility model, which reveals the situation when the two are not assembled.

[0017] Figure 3 It is a schematic structural diagram of the quick-connect device and the fuel cell stack in the utility model, which reveals the situation when the two are assembled.

[0018] Figure 4 It is a schematic cross-sectional structural diagram of the quick connector in the utility model, which reveals the situation when the first interface assembly is docked with the second interface assembly.

[0019] Figure 5 It is a schematic cross-sectional structural diagram of the quick connector in the utility model, which reveals the situation when the first interface assembly is disconnected from the second interface assembly.

[0020] Figure 6 It is an exploded structural diagram of the elbow clamp mechanism in the utility model.

[0021] Figures 1 to 6Chinese: 1. Test equipment, 10. First hydrogen inlet and outlet pipe fitting, 11. First oxygen inlet and outlet pipe fitting, 12. First cooling water inlet and outlet pipe fitting, 2. Stack, 20. Second hydrogen inlet and outlet pipe fitting, 21. Second oxygen inlet and outlet pipe fitting, 22. Second cooling water inlet and outlet pipe fitting, 23. End plate, 3. Quick connection device, 30. Base, 31. Third hydrogen inlet and outlet pipe fitting, 32. Third oxygen inlet and outlet pipe fitting, 33. Third cooling water inlet and outlet pipe fitting, 4. Elbow clamp mechanism, 40. Support, 400. Installation part, 401. Connection part, 402. Sleeve part, 41. Pull rod, 42. Connecting rod, 43. Adjusting bolt, 44. Handle, 45. Stack end plate pressure plate, 46. Nut, 5. First hose, 50. First fixing part, 6. Second hose, 60. Second fixing part, 7. Self-sealing quick connector, 70. First interface assembly, 700. First interface main body part, 7000. First step part, 701. First core body, 7010. Second step part, 7011. Second sealing and mating part, 7012. Installation groove, 7013. Ball receiving hole, 7014. First limiting step part, 702. First sealing plug, 7020. First spring abutting part, 7021. First sealing and mating part, 7022. First pair of top parts, 703. First spring, 704. Ball support, 705. Ball, 706. Locking sleeve, 7060. Second limiting step part, 707. Second spring, 71. Second interface assembly, 710. Second interface main body part, 7100. Third step part, 711. Second core body, 7110. Fourth sealing and mating part, 7111. Card slot, 712. Second sealing plug, 7120. Second spring abutting part, 7121. Third sealing and mating part, 7122. Second pair of top parts, 713. Third spring, 72. First cooling water flow gap, 73. Second cooling water flow gap, 74. Space, 8. Third hose, 80. Third fixing part, 81. Fourth fixing part.

Detailed implementation manners

[0022] The following further describes in detail a connection device for stack testing according to the present utility model through specific embodiments.

[0023] Refer to Figures 1 to 6As shown, a connection device for testing a fuel cell stack comprises: a test device 1, a fuel cell stack 2 and a quick-connect device 3, wherein the test device 1 is provided with a first hydrogen inlet and outlet pipe fitting 10, a first oxygen inlet and outlet pipe fitting 11 and a first cooling water inlet and outlet pipe fitting 12, the fuel cell stack 2 is provided with a second hydrogen inlet and outlet pipe fitting 20, a second oxygen inlet and outlet pipe fitting 21 and a second cooling water inlet and outlet pipe fitting 22, the quick-connect device 3 comprises a base 30, a third hydrogen inlet and outlet pipe fitting 31, a third oxygen inlet and outlet pipe fitting 32, a third cooling water inlet and outlet pipe fitting 33 and a plurality of toggle clamp mechanisms 4 for locking the quick-connect device 3 and the fuel cell stack 2, the third hydrogen inlet and outlet pipe fitting 31 is penetrated in the base 30, one of the free ends of the third hydrogen inlet and outlet pipe fitting 31 is connected to the second hydrogen inlet and outlet pipe fitting 20 of the fuel cell stack 2, and the other free end of the third hydrogen inlet and outlet pipe fitting 31 is connected to the second hydrogen inlet and outlet pipe fitting 20 of the fuel cell stack 2, and the other free end of the third hydrogen inlet and outlet pipe fitting 31 is connected to the second hydrogen inlet and outlet pipe fitting 20 of the fuel cell stack 2. The end protrudes out of the base 30 and is connected to the first hydrogen inlet and outlet pipe fitting 10 on the test equipment 1 through the first hose 5. The first hose 5 is connected to the third hydrogen inlet and outlet pipe fitting 31 and the first hydrogen inlet and outlet pipe fitting 10 respectively through the first fixing member 50, and the first fixing member 50 is a clamp. The third oxygen inlet and outlet pipe fitting 32 is penetrated in the base 30, and one of the free ends of the third oxygen inlet and outlet pipe fitting 32 is connected to the second oxygen inlet and outlet pipe fitting 21 of the fuel cell stack 2. The other free end of the third oxygen inlet and outlet pipe fitting 32 protrudes out of the base 30 and is connected to the first oxygen inlet and outlet pipe fitting 11 on the test equipment 1 through the second hose 6. The second hose 6 is connected to the third oxygen inlet and outlet pipe fitting 32 and the first oxygen inlet and outlet pipe fitting 11 respectively through the second fixing member 60, and the second fixing member 60 is a clamp.

[0024] The third cooling water inlet and outlet pipe fitting 33 is inserted into the base 30, one of the free ends of the third cooling water inlet and outlet pipe fitting 33 is connected to the second cooling water inlet and outlet pipe fitting 22 of the fuel cell stack 2, and the other free end of the third cooling water inlet and outlet pipe fitting 33 protrudes out of the base 30 and is connected with a self-sealing quick-plug connector 7, the self-sealing quick-plug connector 7 includes: a first interface assembly 70 and a second interface assembly 71, the first interface assembly 70 includes: a first interface main body 700, a first core 701, a first sealing plug 702, a first spring 703, a ball bearing The bracket 704, a plurality of balls 705, a locking sleeve 706 and a second spring 707, the first interface main body 700 is provided with a first step portion 7000, the first core body 701 is arranged in the first interface main body 700, the end of the first core body 701 is abutted against the first step portion 7000 of the first interface main body 700, the first sealing plug 702 is arranged in the first core body 701, the first sealing plug 702 includes a first spring abutting portion 7020, a first sealing matching portion 7021 and a first pair of top portions 7022, the first spring abutting portion 7020 is provided in the first interface main body 700, the first core body 701 is provided in the first interface main body 700, the end of the first core body 701 is abutted against the first step portion 7000 of the first interface main body 700, the first sealing plug 702 is provided ... The first core 701 is provided with a plurality of first through holes (not shown), the first core 701 is provided with a second step portion 7010, the first spring 703 is arranged between the first spring abutting portion 7020 of the first sealing plug 702 and the second step portion 7010 of the first core 701, the first core 701 is provided with a second sealing matching portion 7011 matched with the first sealing matching portion 7021 of the first sealing plug 702, the first core 701 is provided with a mounting groove 7012 for mounting the ball bracket 704, and the ball bracket 704 is elastically clamped in the mounting groove 70 12, a plurality of balls 705 are installed in the ball bracket 704, the first core body 701 is provided with a plurality of ball receiving holes 7013 matched with the balls 705, the locking sleeve 706 is arranged on the outside of the first interface main body 700 and the first core body 701, the second spring 707 is sleeved on the first core body 701 and is located between the locking sleeve 706 and the first interface main body 700, the first core body 701 is provided with a first limiting step portion 7014, and the locking sleeve 706 is provided with a second limiting step portion 7060 matched with the first limiting step portion 7014.

[0025] The second interface assembly 71 includes: a second interface main body 710, a second core 711, a second sealing plug 712, and a third spring 713. A threaded connection is adopted between the second interface main body 710 and the second core 711. The second sealing plug 712 is arranged inside the second core 711. The second sealing plug 712 includes a second spring abutting portion 7120, a third sealing mating portion 7121, and a second pair of top portions 7122. A plurality of second through holes (not shown) are provided on the second spring abutting portion 7120. The second pair of top portions 7122 of the second sealing plug 712 cooperate with the first pair of top portions 7022 of the first sealing plug 702. The second interface main body 710 is provided with a third step portion 7100. The third spring 713 is arranged between the third step portion 7100 of the second interface main body 710 and the second spring abutting portion 7120 of the second sealing plug 712. A fourth sealing mating portion 7110 that cooperates with the third sealing mating portion 7121 of the second sealing plug 712 is provided inside the second core 711. A slot 7111 that cooperates with the ball 705 is provided outside the second core 711. In this embodiment, a threaded connection is adopted between the first interface assembly 70 and the third cooling water inlet and outlet pipe fitting 33. One free end of the second interface assembly 71 and the third hose 8 is connected through a third fixing member 80. The third fixing member 80 is a clamp. The other free end of the third hose 8 and the first cooling water inlet and outlet pipe fitting 12 on the testing device 1 are connected through a fourth fixing member 81. The fourth fixing member 81 is a clamp. Of course, in other embodiments, a threaded connection is adopted between the second interface assembly 71 and the third cooling water inlet and outlet pipe fitting 33, and the first interface assembly 70 is connected to the third hose 8, and the present utility model can also be realized.

[0026] The working principle of the self-sealing quick-connect fitting is as follows: When the first interface assembly 70 and the second interface assembly 71 are docked, the ball 705 of the first interface assembly 70 is held in the card slot 7111 of the second interface assembly 71 to achieve the locking between the two. The first pair of tops 7022 of the first interface assembly 70 and the second pair of tops 7122 of the second interface assembly 71 abut against each other, and the first spring 703 is compressed, so that a first cooling water flow gap 72 is formed between the second sealing mating portion 7011 of the first core body 701 and the first sealing mating portion 7021 of the first sealing plug 702. The third spring 713 is compressed, so that a second cooling water flow gap 73 is formed between the fourth sealing mating portion 7110 of the second core body 711 and the third sealing mating portion 7121 of the second sealing plug 712. Cooling water enters from within the first interface main body portion 700, then passes through a number of first through holes in the first spring abutting portion 7020, then passes through the first cooling water flow gap 72 and the second cooling water flow gap 73, then passes through a number of second through holes in the second spring abutting portion 7120, and finally reaches within the second interface main body portion 710 and flows out from within the second interface main body portion 710. When it is necessary to disconnect the first interface assembly 70 and the second interface assembly 71, the lock sleeve 706 is moved to the right, and the second spring 707 is compressed. A space 74 is formed between the lock sleeve 706 and the first core body 701 for the ball to move in a direction away from the card slot (i.e., away from the center of the circle). Then, the second interface assembly 71 is pulled out to the left. During the pulling-out process, the ball 705 is pushed into the space 74 formed between the lock sleeve 706 and the first core body 701, and the ball 705 is disengaged from the card slot 7111 to release the lock. When the first interface assembly 70 and the second interface assembly 71 are disconnected, the second sealing mating portion 7011 of the first core body 701 and the first sealing mating portion 7021 of the first sealing plug 702 are closely fitted to achieve sealing. The sealing surface formed by the second sealing mating portion 7011 of the first core body 701 and the first sealing mating portion 7021 of the first sealing plug 702 is a conical surface. The fourth sealing mating portion 7110 of the second core body 711 and the third sealing mating portion 7121 of the second sealing plug 712 are closely fitted to achieve sealing. The sealing surface formed by the fourth sealing mating portion 7110 of the second core body 711 and the third sealing mating portion 7121 of the second sealing plug 712 is a conical surface, so that the water remaining in the first interface assembly 70 is sealed within the first interface assembly 70, and the water remaining in the second interface assembly 71 is sealed within the second interface assembly 71, preventing it from flowing onto the ground.

[0027] A plurality of toggle mechanisms 4 are arranged around the base 30. The toggle mechanism 4 includes: a support 40, a pull rod 41, a connecting rod 42, an adjusting bolt 43, a handle 44 and a stack end plate pressing plate 45. The support 40 includes a mounting portion 400 mounted on the quick-connect device 3, a connecting portion 401 connected to the handle 44, and a sleeve portion 402 through which the pull rod 41 passes. The mounting portion 400 of the support 40 and the quick-connect device 3 are connected by a plurality of fifth fixing members, and the fifth fixing members are bolts. The connecting portion 401 of the support 40 and the handle 44 are connected by a first rotating shaft (not shown). The pull rod 41 is arranged in the sleeve portion 402 of the support 40 and can move axially along the sleeve portion 402 of the support 40. One free end of the connecting rod 42 and the handle 44 are connected by a second rotating shaft (not shown). The other free end of the connecting rod 42 and one free end of the pull rod 41 are connected by a third rotating shaft (not shown). A nut 46 cooperating with the adjusting bolt 43 is welded to the other free end of the pull rod 41. The stack end plate pressing plate 45 is sleeved on the adjusting bolt 43, and the stack end plate pressing plate 45 cooperates with the end plate 23 on the stack 2. By rotating the adjusting bolt 43, the distance that it extends out of the pull rod 41 can be adjusted, and further the stroke range of the stack end plate pressing plate 45 can be adjusted. The working principle of the toggle mechanism 4 is as follows: when the handle 44 is pulled backward, the handle 44 rotates around the first rotating shaft and pulls the connecting rod 42, and the connecting rod 42 further pulls the pull rod 41. Under the action of the connecting rod 42, the pull rod 41 moves backward from the sleeve portion 402 of the support 40, and further pulls the stack end plate pressing plate 45 to press the stack end plate 23 tightly, so as to realize the locking of the stack 2 and the quick-connect device 3.

[0028] In summary, the present utility model improves the hose connection structure between the stack and the quick-connect device in the prior art into a toggle connection structure, greatly reducing the device connection time during testing, thus improving the work efficiency. In addition, the present utility model is connected with a self-sealing quick connector at the free end of the third cooling water inlet and outlet pipe fitting. Through the docking and disconnection of the quick connector, the connection and disconnection of the third cooling water inlet and outlet pipe fitting and the first cooling water inlet and outlet pipe fitting can be completed, without the need to operate the clamp as in the prior art, so the work efficiency is also greatly improved. In addition, since the quick connector in the present utility model is a self-sealing quick connector, when it is disconnected, the water remaining in the interface will remain in the interface respectively, thus avoiding the cooling water flowing to the ground and causing potential safety hazards.

[0029] The above embodiments only illustrate the principle and efficacy of the present utility model creatively and some applied embodiments, rather than limiting the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the creative concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A connection device for stack testing, comprising: A test device, a fuel cell stack and a quick-connect device, wherein the test device is provided with a first hydrogen inlet and outlet pipe fitting, a first oxygen inlet and outlet pipe fitting and a first cooling water inlet and outlet pipe fitting, and the fuel cell stack is provided with a second hydrogen inlet and outlet pipe fitting, a second oxygen inlet and outlet pipe fitting and a second cooling water inlet and outlet pipe fitting, characterized in that: the quick-connect device comprises a base, a third hydrogen inlet and outlet pipe fitting, a third oxygen inlet and outlet pipe fitting, a third cooling water inlet and outlet pipe fitting and a plurality of toggle clamp mechanisms for locking the quick-connect device and the fuel cell stack, the third hydrogen inlet and outlet pipe fitting is penetrated in the base, one of the free ends of the third hydrogen inlet and outlet pipe fitting is connected to the second hydrogen inlet and outlet pipe fitting of the fuel cell stack, the other free end of the third hydrogen inlet and outlet pipe fitting protrudes out of the base and is connected to the first hydrogen inlet and outlet pipe fitting on the test device through a first hose, the first hose is connected to the third hydrogen inlet and outlet pipe fitting and the first hydrogen inlet and outlet pipe fitting respectively through a first fixing member, the third oxygen inlet and outlet pipe fitting is penetrated in In the base, one of the free ends of the third oxygen inlet and outlet pipe fitting is connected to the second oxygen inlet and outlet pipe fitting of the battery stack, the other free end of the third oxygen inlet and outlet pipe fitting protrudes out of the base and is connected to the first oxygen inlet and outlet pipe fitting on the test equipment through a second hose, the second hose is connected to the third oxygen inlet and outlet pipe fitting and the first oxygen inlet and outlet pipe fitting respectively through a second fixing piece, the third cooling water inlet and outlet pipe fitting is penetrated in the base, one of the free ends of the third cooling water inlet and outlet pipe fitting is connected to the second cooling water inlet and outlet pipe fitting of the battery stack, the other free end of the third cooling water inlet and outlet pipe fitting protrudes out of the base and is connected with a self-sealing quick-plug connector, the self-sealing quick-plug connector is connected to one of the free ends of the third hose through a third fixing piece, the other free end of the third hose is connected to the first cooling water inlet and outlet pipe fitting on the test equipment through a fourth fixing piece, and a plurality of toggle clamp mechanisms are arranged around the base.

2. The connection device for stack testing according to claim 1, characterized in that: The self-sealing quick-connect fitting includes: a first interface assembly and a second interface assembly. The first interface assembly includes: a first interface main body, a first core, a first sealing plug, a first spring, a ball bracket, a plurality of balls, a lock sleeve, and a second spring. The first interface main body is provided with a first step portion. The first core is disposed within the first interface main body, and an end of the first core abuts against the first step portion of the first interface main body. The first sealing plug is disposed within the first core. The first sealing plug includes a first spring abutting portion, a first sealing mating portion, and a first pair of top portions. A plurality of first through holes are provided on the first spring abutting portion. The first core is provided with a second step portion. The first spring is disposed between the first spring abutting portion of the first sealing plug and the second step portion of the first core. The first core is provided with a second sealing mating portion that mates with the first sealing mating portion of the first sealing plug. The first core is provided with a mounting groove for mounting the ball bracket. The ball bracket is elastically clamped within the mounting groove. A plurality of balls are mounted within the ball bracket. The first core is provided with a plurality of ball receiving holes that mate with the balls. The lock sleeve is disposed outside the first interface main body and the first core. The second spring is sleeved on the first core and is located between the lock sleeve and the first interface main body. The first core is provided with a first limiting step portion, and the lock sleeve is provided with a second limiting step portion that mates with the first limiting step portion. The second interface assembly includes: a second interface main body, a second core, a second sealing plug, and a third spring. The second interface main body and the second core are connected by a thread. The second sealing plug is disposed within the second core. The second sealing plug includes a second spring abutting portion, a third sealing mating portion, and a second pair of top portions. A plurality of second through holes are provided on the second spring abutting portion. The second pair of top portions of the second sealing plug mates with the first pair of top portions of the first sealing plug. The second interface main body is provided with a third step portion. The third spring is disposed between the third step portion of the second interface main body and the second spring abutting portion of the second sealing plug. The inner side of the second core is provided with a fourth sealing mating portion that mates with the third sealing mating portion of the second sealing plug. The outer side of the second core is provided with a card slot that mates with the balls.

3. The connection device for stack testing according to claim 2, characterized in that: When the first interface assembly and the second interface assembly are docked, the balls of the first interface assembly are snapped into the card slots of the second interface assembly, and the first pair of top portions of the first interface assembly and the second pair of top portions of the second interface assembly abut against each other, so as to form a first cooling water flow gap between the second sealing mating portion of the first core and the first sealing mating portion of the first sealing plug, and to form a second cooling water flow gap between the fourth sealing mating portion of the second core and the third sealing mating portion of the second sealing plug.

4. The connection device for stack testing according to claim 2, characterized in that: When the first interface assembly and the second interface assembly are disconnected, the second sealing mating portion of the first core and the first sealing mating portion of the first sealing plug are closely attached to achieve sealing, and the fourth sealing mating portion of the second core and the third sealing mating portion of the second sealing plug are closely attached to achieve sealing.

5. The connection device for stack testing according to claim 2, characterized in that: Of the first interface assembly and the second interface assembly, one of them is threadedly connected to the third cooling water inlet / outlet pipe fitting, and the other is connected to the third hose by a clamp.

6. The connection device for stack testing according to claim 1, wherein: The first fixing member, the second fixing member, the third fixing member and the fourth fixing member are all clamps.

7. The connection device for stack testing according to claim 1, wherein: The toggle clamp mechanism includes: a support, a pull rod, a connecting rod, an adjusting bolt, a handle and a stack end plate pressing plate. The support includes a mounting portion mounted on the quick-connect device, a connecting portion connected to the handle, and a sleeve portion through which the pull rod passes. The mounting portion of the support is connected to the quick-connect device by a plurality of fifth fixing members. The connecting portion of the support and the handle are connected by a first rotating shaft. The pull rod is disposed within the sleeve portion of the support and can axially move along the sleeve portion of the support. One free end of the connecting rod is connected to the handle by a second rotating shaft. The other free end of the connecting rod and one free end of the pull rod are connected by a third rotating shaft. A nut cooperating with the adjusting bolt is welded to the other free end of the pull rod. The stack end plate pressing plate is sleeved on the adjusting bolt.

8. The connection device for stack testing according to claim 7, wherein: The fifth fixing member is a bolt.

9. The connection device for stack testing according to claim 7, characterized in that: The stack end plate pressing plate cooperates with the end plate on the stack.

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