CN201038242Y - Assembling device for batch production of fuel cell stacks - Google Patents

Abstract

The utility model discloses an assembling device for batch production of fuel cell stacks, which is characterized by comprising an upper movable workbench, a lower movable workbench, a guide post, a grating ruler and a control platform, wherein the upper movable workbench is controlled by an upper hydraulic cylinder to move, the lower movable workbench is controlled by a lower hydraulic cylinder to move, and the movable workbench is connected with the hydraulic cylinder through a piston rod; when assembling, the fuel cell stack is positioned between the work tables through the positioning holes, and the upper moving work table and the lower moving work table move oppositely along the guide columns and apply force to assemble the fuel cell stack; and the grating ruler and the pressure sensor in the hydraulic cylinder transmit feedback signals to the console to monitor the assembly. The assembling device has the advantages of high automation degree, high production efficiency, high assembling precision and the like, and is suitable for being widely applied to batch production of fuel cell stacks.

Description

Assembly device for mass production of fuel cell stacks

technical field

The utility model relates to a fuel cell production device, in particular to an assembly device for mass production of fuel cell stacks.

Background technique

A fuel cell is an energy conversion device that directly converts chemical energy in fuel and oxidant into electrical energy through an electrocatalyst on an electrode. Among them, the proton exchange membrane fuel cell (PEMFC) uses perfluorosulfonic acid solid polymer as electrolyte, platinum/carbon or platinum-ruthenium/carbon as electrocatalyst, hydrogen or purified reformed gas as fuel, and air or pure oxygen as oxidant , graphite or surface-modified metal plates with gas flow channels are bipolar plates. The main body of the battery stack is the repeated superposition of membrane electrodes (Membrane Electrode Assembly, MEA for short), bipolar plates and corresponding seal unit parts. One end is the anode current collecting plate, and the other end is the cathode current collecting plate. The flow plate is adjacent to the end plate of the battery stack. Generally speaking, the fuel cell stack must use fastening bolts and nuts to fully compress the two end plates within a certain pressure range to ensure a certain sealing performance and internal resistance of the cell stack to ensure its stable, safe and efficient operation.

In a typical proton exchange membrane fuel cell, the MEA is generally placed between two bipolar plates. As shown in Figure 1, the fluid holes 11 on the multiple bipolar plates and the MEA fluid holes 12 are superimposed to form a common channel for the fuel cell stack. The size and shape of the common channel will affect the distribution of the reaction fluid between the individual cells, so the relative displacement of the bipolar plate and MEA should be avoided as far as possible during the fuel cell stack assembly process. The vast majority of PEMFC cell stacks are assembled by press filter, and most of them are assembled manually and horizontally. At present, it is more popular to use a positioning mechanism to ensure the formation of the common channel, but in practical applications, this single method cannot avoid the occurrence of those small displacements.

Shanghai Shenli Technology Co., Ltd. proposed in the utility model patent (patent number ZL200420090002.6; authorized announcement date 2004.9.13) that the assembly frame suitable for large-scale rapid assembly and testing of fuel cell stacks is horizontal installation and single movement. For this kind of fuel cell stack assembled horizontally using fastening bolts and nuts, the following problems are prone to occur during the assembly process:

1. It is difficult to ensure that the force on both ends of the plate is consistent during the assembly process. The uneven force will cause damage to the MEA and bipolar plates, and will also affect the performance and life of the fuel cell stack.

2. In the assembly process, it is difficult to overcome the small displacement between components due to gravity only by internal positioning guide rods, which in turn affects the distribution of internal fluid and the discharge of generated water.

3. The pressure adjustable device, whether it is a piston cylinder or a hydraulic jack, has an adjustable pressure but no pressure maintaining function. It is difficult to ensure the constant assembly pressure of the battery stack and the sealing performance of the fuel cell stack during the assembly test process.

4. The device has a single assembly variety, the assembly time is long and the repeatability is not high, and it cannot be adapted to mass production in practical applications

Contents of the invention

The purpose of this utility model is to develop an assembly device for mass production of fuel cell stacks with high degree of automation, good assembly effect and high production efficiency aiming at the deficiencies of the above technologies. The technical solutions of the present utility model are as follows:

An assembly device for mass production of fuel cell stacks, characterized in that it includes an upper movable worktable, a lower movable workbench, a guide column, a grating ruler and a console, the movement of the upper movable workbench is controlled by an upper hydraulic cylinder, and the The movement of the lower movable workbench is controlled by the lower hydraulic cylinder, and the movable workbench is connected with the hydraulic cylinder through the piston rod; when assembling, the fuel cells are stacked between the worktables and positioned through the positioning holes, and the upper movable workbench and the lower The mobile workbench moves toward each other along the guide column and at the same time exerts force on the fuel cell stack for assembly; the grating scale and the pressure sensor in the hydraulic cylinder transmit feedback signals to the console to monitor the assembly.

The upper movable workbench and the lower moveable workbench are provided with positioning holes of various specifications, which can be used to locate different types of fuel cell stacks.

The console adopts PLC as the main controller to control the assembly pressure and assembly height of the fuel cell stack.

The above technical scheme of the utility model provides a guarantee for batch production and automatic assembly of fuel cell stacks. Compared with the prior art, the utility model has the following characteristics:

1. The assembly of the fuel cell stack is realized through the hydraulically controlled up-and-down moving workbench, which ensures that the plates at both ends bear the same force, and the pressure in the assembly process is even and stable.

2. The up and down movement of the workbench can control the feed independently, and the workbench is reserved with positioning holes for fuel cell stacks of different specifications, which is suitable for the assembly of various fuel cell stacks.

3. The device includes a pressure maintaining control system, which can ensure the consistency and uniformity of the internal pressure of the fuel cell during the assembly process.

4. Vertical assembly overcomes the slight displacement between components due to gravity, thereby ensuring the good formation of public channels.

5. The device can set the assembly pressure and stack assembly height by itself, with a high degree of automation.

In summary, the utility model is simple in structure, easy to produce, low in cost and suitable for wide popularization.

Description of drawings

Figure 1 is a schematic diagram of the structure of a battery stack;

Fig. 2 is the schematic diagram before the work of the assembling device of the present utility model;

Fig. 3 is the working schematic diagram of assembling device of the present utility model;

Fig. 4 is a schematic diagram of positioning holes of different types of fuel cells in the mobile workbench of the present invention;

Fig. 5 is a schematic diagram of the electric structure of the control unit of the utility model;

Fig. 2 is the accompanying drawing of the specification abstract of the utility model.

In the figure: 1. Up moving worktable, 2. Guide column, 3. Down moving workbench, 4. Hydraulic cylinder, 6. Fuel cell stack, 7. Grating ruler, 8. Piston rod, 9. Console, 10. Positioning hole, 11, fluid hole 1, 12, fluid hole 2, 14, upper hydraulic cylinder.

Detailed ways

As shown in Figures 2 to 5, an assembly device for mass production of fuel cell stacks is characterized in that it includes an upper movable workbench 1, a lower movable workbench 3, a guide column 2, a grating ruler 7 and a console 13, the described The movement of the upper movable workbench 1 is controlled by the upper hydraulic cylinder 14, and the movement of the lower movable workbench 3 is controlled by the lower hydraulic cylinder 4, wherein the movable workbench and the hydraulic cylinder are connected by a piston rod 8, and the hydraulic cylinder 4 is used for pressure actuation. mechanism, used to promote the operation of moving up and down the workbench 1 and 3; when assembling, the fuel cell stack 6 is placed between the workbenches and positioned through the positioning hole 10; in this device, the upper moving workbench 1 and the lower moving workbench Positioning holes 10 of various specifications are provided on the 3, and fuel cell stacks 6 of different types can be positioned. The upper movable workbench 1 and the lower movable workbench 3 are located at the upper and lower ends of the fuselage, and can move up or down independently along the guide column 2, and can also move toward each other at the same time to apply force to both ends of the fuel cell stack 6 for assembly; the grating The ruler 7 transmits the feedback signal to the console 9 to monitor the assembly. The console 9 includes devices such as fuel tank, hydraulic pump, motor, cartridge valve block, pressure gauge, oil filter, air filter and liquid level gauge, the pressure sensor in the grating ruler 7 and the hydraulic cylinder 4, and the fuel cell The height of the pile 6 and the pressure during assembly are passed in the console 9. Console 9 uses PLC as the main controller to control the assembly pressure and assembly height of the fuel cell stack. The PLC workstation controls its actuators such as relays, contactors, signal lights, intelligent pressure regulators, electromagnetics, and pressure transmitters through circuits. and other actions and feedback, and then adjust and control the assembly pressure or assembly height of the entire assembly device.

Embodiment 1: As shown in Figure 2 and Figure 3, assemble a proton exchange membrane fuel cell stack, the size of the bipolar plate is 200×200mm, the number of cells is 100, and the assembly pressure is 10kg/ ^cm2 according to actual requirements; The console 9 sets the assembly pressure, and monitors the pressure of moving the workbench 1 and 3 up and down through the grating ruler 7. When the set pressure value is reached, the grating ruler 7 sends a feedback signal back to the console 9, and the console 9 will send out Command to make the upper mobile workbench 1 and the lower mobile workbench 3 stop running. At this time, the fuel cell stack is assembled by fastening the bolts and fastening nuts. So far, the fuel cell stack is assembled.

Embodiment 2: As shown in Figure 2 and Figure 3, assemble a proton exchange membrane fuel cell stack, the size of the bipolar plate is 400×100mm, the number of battery cells is 100, and the height is 300mm according to the actual requirements; Assembling pressure is set, and the distance between the moving table 1 and 3 is monitored through the grating ruler 7. When the set distance is reached, the grating ruler 7 will send a feedback signal back to the console 9, and the console 9 will issue a command to move up and down. The workbench 1 and the lower movable workbench 3 stop running. At this time, the fuel cell stack is assembled by fastening the bolts and fastening nuts. So far, the fuel cell stack is assembled.

The above is only a preferred embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any equivalent replacement or change of the technical solutions and their inventive concept shall be covered by the protection scope of the present utility model.

Claims (3)

1. a fuel cell pack is produced in batches and is used apparatus for assembling, it is characterized in that comprising travelling table (1), following travelling table (3), lead (2), grating chi (7) and control desk (13), the described travelling table (1) of going up is by last hydraulic cylinder (14) controlled motion, described travelling table (3) down is by following hydraulic cylinder (4) controlled motion, and wherein travelling table is with connecting by piston rod (8) between the hydraulic cylinder; When assembling fuel cell pack (6) is placed between the workbench and positions by location hole (10), last travelling table (1) and following travelling table (3) are assembled fuel cell pack (6) application of force simultaneously along lead (2) move toward one another; Pressure sensor in described grating chi (7) and the hydraulic cylinder (4) is sent to control desk (9) with feedback signal assembling is monitored.

2. fuel cell pack according to claim 1 is produced in batches and is used apparatus for assembling, it is characterized in that described upward travelling table (1) and following travelling table (3) are provided with the location hole (10) of plurality of specifications, can position the fuel cell pack (6) of different model.

3. fuel cell pack according to claim 1 is produced in batches and is used apparatus for assembling, it is characterized in that it is main controller that described control desk (9) adopts PLC, can control the assembling pressure and the assembled height of fuel cell pack respectively.

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