Pressing and assembling device for hydrogen fuel cell stack

Abstract

The utility model discloses a hydrogen fuel cell stack pressing and assembling device which comprises a bottom plate, a limiting groove is formed in the bottom plate, a stack base is placed in the limiting groove, a bipolar plate and carbon paper which are stacked with each other are placed in the stack base, two grooves which are symmetrical front and back are formed in a stack top cover, and a left through hole and a right through hole are formed in the grooves. The electric pile base is fixedly connected with four internal thread blocks which are coaxially aligned with the through holes up and down, the electric pile top cover and the electric pile base can be fixedly connected by penetrating a threaded rod through each through hole and then screwing the threaded rod into the internal thread block, and after the bipolar plate and the carbon paper are arranged in the electric pile base in a crossed manner, a positioning rod at the bottom of the electric pile top cover is inserted into a positioning groove; and after a hydraulic pump is used for applying pressure to the top cover of the electric pile, the threaded rod is matched to penetrate through the through hole to be screwed into the bipolar plate, so that the bipolar plate and the carbon paper can be tightly connected, and normal work of the electric pile is ensured.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen fuel cells, in particular to a hydrogen fuel cell stack pressure assembly device. Background Art

[0002] When assembling the hydrogen fuel cell stack, it is necessary to apply pressure between the bipolar plate and the carbon paper and then fix them together to ensure the normal operation of the stack. Since the pressure is high and difficult to handle manually, it is necessary to apply pressure to the top cover of the stack through a hydraulic pump and to conveniently fix the connection after pressure application to solve the complex problem of stack assembly after pressure application. Utility Model Content

[0003] The purpose of the utility model is to provide a hydrogen fuel cell stack pressure assembly device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydrogen fuel cell stack pressure assembly device, comprising a bottom plate, a limiting groove is provided on the bottom plate, a stack base is placed in the limiting groove, bipolar plates and carbon paper stacked on each other are placed in the stack base, and the stack base is provided with six left-right symmetrical positioning grooves, a stack top cover is provided on the upper side of the stack base, six positioning rods inserted into the positioning grooves are fixedly connected to the lower end surface of the stack top cover, the stack top cover is provided with two grooves symmetrical front and back, and two left and right through holes are provided in the grooves, and the stack base is fixedly connected with four internal thread blocks coaxially aligned with the through holes above and below, and the stack top cover and the stack base can be fixedly connected by passing a threaded rod through each through hole and then screwing it into the internal thread block, so that the bipolar plate and the carbon paper can be tightly connected after applying pressure, thereby ensuring the normal operation of the stack.

[0005] Advantageously, the bottom plate is fixedly connected to a bracket, the upper end surface of the bracket is fixedly connected to a hydraulic pump, and the hydraulic pump is aligned vertically with the center of the stack top cover;

[0006] Advantageously, the hydraulic pump is connected to a pressure frame, and the hydraulic pump can drive the pressure frame to move up and down. The pressure frame is located above the top cover of the battery stack and is aligned with the center of the top cover of the battery stack, so that pressure can be applied to the top cover of the battery stack to install and connect the battery stack;

[0007] Advantageously, a controller is fixedly connected to the upper surface of the bottom plate, and the controller controls the hydraulic pump so as to automatically apply pressure to the top cover of the stack.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] The utility model provides a threaded rod, a stack top cover and a positioning rod. After the bipolar plate and the carbon paper are cross-placed in the stack base, the positioning rod at the bottom of the stack top cover is inserted into the positioning groove. After the stack top cover is pressurized by a hydraulic pump, the threaded rod is screwed into the bipolar plate through the through hole, so that the bipolar plate and the carbon paper are tightly connected to ensure the normal operation of the stack.

[0010] The hydraulic pump can drive the pressure frame downward to apply pressure to the top cover of the battery stack. After the threaded rods are connected, the top cover of the battery stack is loosened to maintain a certain pressure between the bipolar plates and the carbon paper, ensuring a tight connection of the battery stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0012] Figure 2 for Figure 1 A top view of

[0013] Figure 3 for Figure 2 AA cross-sectional diagram of ;

[0014] Figure 4 for Figure 2 BB cross-sectional diagram;

[0015] Figure 5 for Figure 4 A partial enlarged schematic diagram of

[0016] Figure 6 It is a three-dimensional schematic diagram of the pressure frame of the utility model;

[0017] Figure 7 It is a three-dimensional schematic diagram of the positioning rod of the utility model.

[0018] In the figure: 100, bottom plate; 101, battery stack base; 102, battery stack top cover; 103, controller; 104, bracket; 105, hydraulic pump; 106, pressure frame; 107, threaded rod; 108, internal thread block; 109, groove; 110, bipolar plate; 111, positioning groove; 112, positioning rod; 113, carbon paper; 114, limit groove; 115, through hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0020] Embodiment 1:

[0021] See also Figure 1-7 The utility model provides a technical solution: a hydrogen fuel cell stack pressure assembly device, including a bottom plate 100, the bottom plate 100 is provided with a limiting groove 114, a stack base 101 is placed in the limiting groove 114, the stack base 101 is placed with a bipolar plate 110 and a carbon paper 113 stacked on each other, and the stack base 101 is provided with six symmetrical positioning grooves 111, the stack base 101 is provided with a stack top cover 102 on the upper side, and the lower end surface of the stack top cover 102 is fixedly connected with six positioning rods inserted into the positioning grooves 111 112, the stack top cover 102 is provided with two front-to-back symmetrical grooves 109, the grooves 109 are provided with two left and right through holes 115, the stack base 101 is fixedly connected with four internal thread blocks 108 which are coaxially aligned with the through holes 115, and the threaded rod 107 passes through each through hole 115 and is screwed into the internal thread block 108, so that the stack top cover 102 and the stack base 101 can be fixedly connected, so that the bipolar plate 110 and the carbon paper 113 can be tightly connected by applying pressure, thereby ensuring the normal operation of the stack.

[0022] The bottom plate 100 is fixedly connected to a bracket 104, and the upper end surface of the bracket 104 is fixedly connected to a hydraulic pump 105, and the hydraulic pump 105 is aligned with the center of the stack top cover 102;

[0023] The hydraulic pump 105 is connected to a pressure frame 106, and the hydraulic pump 105 can drive the pressure frame 106 to move up and down. The pressure frame 106 is located above the battery stack top cover 102 and is aligned with the center of the battery stack top cover 102, so that pressure can be applied to the battery stack top cover 102 to install and connect the battery stack;

[0024] A controller 103 is fixedly connected to the upper end surface of the bottom plate 100 , and the controller 103 controls the hydraulic pump 105 so as to automatically apply pressure to the stack top cover 102 .

[0025] Working principle:

[0026] First, place the stack base 101 in the limiting groove 114, then cross-stack the bipolar plates 110 and the carbon paper 113 in the limiting groove 114, and then insert the positioning rod 112 on the stack top cover 102 into the positioning groove 111 of the stack base 101;

[0027] The hydraulic pump 105 is started through the controller 103, and the hydraulic pump 105 drives the pressure frame 106 to move downward. After the pressure frame 106 presses against the stack top cover 102, it applies strong pressure to the stack top cover 102, the bipolar plate 110 and the carbon paper 113, so that the bipolar plate 110 and the carbon paper 113 are tightly connected to ensure that the stack can work normally. Then, the threaded rod 107 is passed through the through hole 115 and screwed into the internal thread block 108 to fix the stack top cover 102 and the stack base 101. The hydraulic pump 105 is started again to drive the pressure frame 106 to move upward to loosen the stack top cover 102. The assembly is completed, and the next stack can be assembled after it is taken out.

[0028] It is obvious to those skilled in the art that various modifications and variations may be made to the disclosed embodiments. Other embodiments will be readily apparent to those skilled in the art in view of the specification and practice of the disclosed system. It is intended that the specification and examples be considered exemplary only, with the true scope of protection being determined by the appended claims and their equivalents.

Claims

1. A hydrogen fuel cell stack pressure assembly device, comprising a base plate (100), characterized in that: The bottom plate (100) is provided with a limiting groove (114), a stack base (101) is placed in the limiting groove (114), bipolar plates (110) and carbon paper (113) stacked on each other are placed in the stack base (101), and the stack base (101) is provided with six symmetrical positioning grooves (111), a stack top cover (102) is provided on the upper side of the stack base (101), and the lower end surface of the stack top cover (102) is fixedly connected with six rods inserted into the positioning grooves (111). A positioning rod (112), the stack top cover (102) is provided with two grooves (109) symmetrically arranged in front and back, the grooves (109) are provided with two left and right through holes (115), the stack base (101) is fixedly connected with four internal thread blocks (108) coaxially aligned with the through holes (115) in the upper and lower directions, and the threaded rod (107) passes through each through hole (115) and is screwed into the internal thread block (108), so that the stack top cover (102) and the stack base (101) can be fixedly connected.

2. A hydrogen fuel cell stack pressure assembly device according to claim 1, characterized in that: The bottom plate (100) is fixedly connected to a bracket (104), the upper end surface of the bracket (104) is fixedly connected to a hydraulic pump (105), and the hydraulic pump (105) is aligned vertically with the center of the stack top cover (102).

3. A hydrogen fuel cell stack pressure assembly device according to claim 2, characterized in that: The hydraulic pump (105) is dynamically connected to a pressure frame (106), and the hydraulic pump (105) can drive the pressure frame (106) to move up and down.

4. A hydrogen fuel cell stack pressure assembly device according to claim 3, characterized in that: The pressure frame (106) is located above the stack top cover (102) and is vertically aligned with the center of the stack top cover (102).

5. A hydrogen fuel cell stack pressure assembly device according to claim 4, characterized in that: A controller (103) is fixedly connected to the upper end surface of the base plate (100), and the controller (103) controls the hydraulic pump (105).

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