Fuel cell stack steel belt packaging equipment

Abstract

The utility model provides fuel cell stack steel belt packaging equipment which comprises a steel belt welding tool for forming a steel belt welding piece, and further comprises a stack packaging tool, the steel belt welding tool comprises a tightening piece and an electric pile mold matched with an electric pile packaging area needing to be packaged in shape, and after a steel belt workpiece subjected to pre-forming treatment is fixed to the forming face of the electric pile mold through the tightening piece (2-3), a welding machine is used for welding the steel belt workpiece so that the steel belt workpiece can be shaped into a steel belt welding piece used for electric pile packaging; the galvanic pile packaging tool comprises a press machine and a pressing block structure connected with the press machine, the pressing block structure comprises an upper pressing block (3-2) and a lower pressing block (3-1) which are respectively positioned on the upper side and the lower side of the galvanic pile to be packaged; when the galvanic pile is packaged, a press machine applies pressure to the galvanic pile through the pressing block structure, so that the height of the pressed galvanic pile part is reduced to form a packaging area in which a steel strip welding piece can be sleeved; according to the utility model, an artificial or semi-artificial assembly mode can be adopted, and packaging operation can be carried out on the galvanic piles in batches.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a steel belt packaging device for a fuel cell stack. Background Art

[0002] With the increasingly obvious problems of world energy shortage and environmental pollution, energy conservation and emission reduction have become an inevitable trend. Hydrogen energy, as an ideal clean energy, has many advantages such as cleanness and high efficiency. As a power generation device using this energy, hydrogen fuel cells have received extensive attention.

[0003] Proton exchange membrane fuel cells are a typical type of hydrogen fuel cells. A fuel cell system mainly includes a stack, a hydrogen supply system, an air supply system, a water and heat management system, a control system, etc. Among them, the stack is the core of the fuel cell system, and the rationality of the packaging technology is one of the important factors determining the performance and stability of the fuel cell. Currently, there are usually two methods for packaging the stack: one is bolt packaging, which has a simple structure and convenient operation, but is relatively large in volume and weight. The other is steel belt packaging, which has a compact structure and light weight, but a complex process.

[0004] Generally speaking, bolt packaging is simple and easy to implement, but it occupies a large space and the force near the screw is uneven, which is likely to cause the end plate to deform. Moreover, steel belt packaging has a small volume and light weight, and the applied force is relatively uniform. However, due to process problems, it is difficult to ensure the consistency of each steel belt.

[0005] Due to the rapid development of current fuel cell stacks, with rapid technological changes and frequent product iterations. The main purpose of this patent is to solve the problem of small-batch stack packaging. Compared with assembly line assembly, manual or semi-manual assembly is more cost-effective.

[0006] The weight and volume of the stack are also important parameters of the stack. At the same power, the smaller the weight and volume, the higher the power density of the stack, and the better the performance of the stack. Therefore, the secondary purpose of this patent is to lightweight the stack, and the method of using steel belt packaging is an effective means to solve this problem.

[0007] The traditional steel belt production method is usually manual bending, and the produced steel belt size has errors, which may lead to inconsistent loads of each steel belt after installation, resulting in poor sealing performance of the stack. Therefore, the further purpose of this patent is to solve the consistency of steel belt preforming. Summary of the Utility Model

[0008] The utility model provides a steel belt packaging device for a fuel cell stack, which can adopt a manual or semi-manual assembly method to perform packaging operations on the stack in batches.

[0009] The utility model adopts the following technical solutions.

[0010] A fuel cell stack steel belt packaging device, the membrane electrode of the stack has compressibility, and the packaging device includes a steel belt welding tooling for forming a steel belt welded part (3-7), and also includes a stack packaging tooling; the steel belt welding tooling includes a clamping piece (2-3) and a stack mold (2-1) that matches the shape of the stack packaging area to be packaged. When the preformed steel belt workpiece (2-2) is fixed to the forming surface of the stack mold by the clamping piece (2-3), the steel belt workpiece is welded by a welding machine to be shaped into a steel belt welded part for stack packaging.

[0011] The stack packaging tooling includes a press and a pressing block structure connected thereto; the pressing block structure includes an upper pressing block (3-2) and a lower pressing block (3-1) respectively located on the upper and lower sides of the stack to be packaged. When packaging the stack, the press applies pressure to the stack through the pressing block structure, so that the height of the pressed stack part is reduced to form a packaging area that can be sleeved with the steel belt welded part.

[0012] The preformed steel belt workpiece is formed by processing the steel belt (0-1) through a steel belt preforming device; the steel belt preforming device includes a conveyor belt (1-1), a pressing oil cylinder (1-2), a cutting oil cylinder (1-3), and a bending device (1-4) arranged in sequence.

[0013] The conveyor belt includes a steel belt conveying surface formed by a plurality of rollers (1-5); when the steel belt moves to the designated position of the bending device, the bending device starts to bend the steel belt. At this time, the pressing block (1-6) on the pressing oil cylinder presses the steel belt downward; the central axis (1-7) of the bending disc (1-8) of the bending device serves as the bending fulcrum of the steel belt, and the motor (1-9) of the bending device controls the bending disc to rotate at a predetermined angle required for preforming treatment at a predetermined position. The steel belt is bent and shaped by the bending round steel (1-10). When the steel belt bending is completed, the cutting oil cylinder presses downward to cut off the steel belt, forming a preformed steel belt workpiece.

[0014] The bending round steel is adjacent to the central axis of the bending disc; a plurality of steel belt gaps through which the steel belt can pass are provided at the edge of the bending disc. When bending the steel belt, the starting end of the steel belt penetrates into the steel belt gap at the edge of the bending disc, so that the steel belt bends toward the bending round steel as the bending disc rotates.

[0015] The upper pressing block and the lower pressing block both include a fixed block (3-3) and a plurality of movable blocks (3-4) arranged at intervals on the pressure output surface of the fixed block. The movable blocks of the upper pressing block and the lower pressing block are directly opposite to each other up and down. When encapsulating the fuel cell stack, the lower pressing block is placed on the workbench surface (3-5) of the press, the fuel cell stack (3-6) is placed on the lower pressing block, the upper pressing block is fixed at the upper pressing plate of the press. After the press is preset with a force or displacement, the fuel cell stack is pressed through the pressing block structure, so that an encapsulation area into which a steel belt weldment can be inserted is formed at the part of the fuel cell stack pressed between adjacent movable blocks, and a predetermined slot for sleeving the steel belt is provided at the encapsulation area.

[0016] The fixed block and the movable block are connected by a pressing block bolt (3-8).

[0017] When the preformed steel belt workpiece (2-2) is fixed to the forming surface of the fuel cell stack mold with the clamping piece (2-3), first tighten the clamping piece bolt (2-4) on the clamping piece, and then use a handheld welding machine to weld the steel belt workpiece. After welding and shaping, knock off the formed steel belt weldment.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. For fuel cell stacks of different models and sizes, only by modifying the relevant parameters of the equipment, the steel belt preforming device can bend the steel belt to form the required steel belt workpiece.

[0020] 2. The steel belt is preformed by electronic control. The bending angle of the steel belt is in place, and the external dimensions are accurate, ensuring the consistency of the steel belt and optimizing the performance of the fuel cell stack.

[0021] 3. Using the steel belt forming device to preform the steel belt is more efficient than traditional manual bending, and the finished product is more beautiful.

[0022] 4. Using the steel belt forming device to bend the steel belt is not limited to right angles, and arc-shaped steel belts can also be generated, which is more suitable for the encapsulation steel belt of the fuel cell stack.

[0023] 5. Compared with directly welding on the fuel cell stack, using the fuel cell stack mold to simulate the shape of the fuel cell stack makes the welding quality better, further ensuring the consistency of the steel belt.

[0024] 6. The fuel cell stack encapsulation tooling has a simple structure, is easy to operate, is more economical, and is suitable for the trial production of fuel cell stack samples or small-batch production.

[0025] 7. The fuel cell stack encapsulation tooling occupies a small space and does not crowd the manifold position. After the fuel cell stack is encapsulated, the airtightness test of the fuel cell stack can be directly carried out on the press. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following further describes the present invention in detail with reference to the drawings and specific embodiments:

[0027] Attached Figure 1 is a front view schematic diagram of the steel strip forming device;

[0028] Attached Figure 2 is a front view of the bending disc;

[0029] Attached Figure 3 is a left view of the bending disc;

[0030] Attached Figure 4 are the front view and left view of the steel strip welding tooling;

[0031] Attached Figure 5 is a front view of the stack packaging tooling;

[0032] Attached Figure 6 is a front view of the pressing block;

[0033] Attached Figure 7 is a sectional view taken along line A - A of the pressing block;

[0034] The description of the reference numerals in the attached drawings is as follows:

[0035] 0 - 1 steel strip;

[0036] 1 - 1 conveyor belt, 1 - 2 pressing cylinder, 1 - 3 cutting cylinder, 1 - 4 bending device, 1 - 5 roller, 1 - 6 pressing block, 1 - 7 bending disc central axis, 1 - 8 bending disc, 1 - 9 motor, 1 - 10 bending round steel;

[0037] 2 - 1 stack mold, 2 - 2 steel strip workpiece, 2 - 3 clamping piece, 2 - 4 clamping piece bolt;

[0038] 3 - 1 lower pressing block, 3 - 2 upper pressing block, 3 - 3 pressing block fixing block, 3 - 4 pressing block movable block, 3 - 5 press workbench surface, 3 - 6 stack, 3 - 7 steel strip welded part, 3 - 8 pressing block bolt. Specific implementation mode

[0039] As shown in the figure, a fuel cell stack steel strip packaging device, the membrane electrode of the stack has compressibility, the packaging device includes a steel strip welding tooling for forming the steel strip welded part 3 - 7, and also includes a stack packaging tooling; the steel strip welding tooling includes a clamping piece 2 - 3 and a stack mold 2 - 1 that matches the outer shape of the stack packaging area to be packaged. When the pre - formed steel strip workpiece 2 - 2 is fixed to the forming surface of the stack mold with the clamping piece 2 - 3, the steel strip workpiece is welded by a welding machine to be shaped into a steel strip welded part for stack packaging;

[0040] The stack packaging tooling includes a press and a pressing block structure connected thereto; the pressing block structure includes an upper pressing block 3-2 and a lower pressing block 3-1 respectively located on the upper and lower sides of the stack to be packaged; when packaging the stack, the press applies pressure to the stack through the pressing block structure, so that the height of the pressed stack part is reduced to form a packaging area that can fit into the steel belt welding part.

[0041] The preformed steel belt workpiece is formed by processing the steel belt 0-1 through a steel belt preforming device; the steel belt preforming device includes a conveyor belt 1-1, a pressing oil cylinder 1-2, a cutting oil cylinder 1-3, and a bending device 1-4 arranged in sequence.

[0042] The conveyor belt includes a steel belt conveying surface formed by a plurality of rollers 1-5; when the steel belt moves to the designated position of the bending device, the bending device starts to bend the steel belt. At this time, the pressing block 1-6 on the pressing oil cylinder presses the steel belt downward; the central axis 1-7 of the bending disc 1-8 of the bending device serves as the bending fulcrum of the steel belt, and the motor 1-9 of the bending device controls the bending disc to rotate at a predetermined angle required for preforming at a predetermined position. The steel belt is bent and shaped by the bending round steel 1-10. When the steel belt bending is completed, the cutting oil cylinder presses downward to cut off the steel belt, forming a preformed steel belt workpiece.

[0043] The bending round steel is adjacent to the central axis of the bending disc; a plurality of steel belt gaps through which the steel belt can pass are provided at the edge of the bending disc. When bending the steel belt, the starting end of the steel belt penetrates into the steel belt gap at the edge of the bending disc, so that the steel belt bends towards the bending round steel as the bending disc rotates.

[0044] Both the upper pressing block and the lower pressing block include a fixed block 3-3 and a plurality of movable blocks 3-4 arranged at intervals on the pressure output surface of the fixed block. The movable blocks of the upper pressing block and the lower pressing block are directly opposite to each other up and down. When packaging the stack, the lower pressing block is placed on the workbench surface 3-5 of the press, the stack 3-6 is placed on the lower pressing block, the upper pressing block is fixed at the upper pressing plate of the press. After the press is set with a preset force or displacement, the press applies pressure to the stack through the pressing block structure, so that a packaging area that can fit into the steel belt welding part is formed at the pressed stack part between adjacent movable blocks. A predetermined groove for sleeving the steel belt is provided at the packaging area.

[0045] The fixed block and the movable block are connected by a pressing block bolt 3-8.

[0046] When the preformed steel belt workpiece 2-2 is fixed to the forming surface of the stack mold with the clamping piece 2-3, first tighten the clamping piece bolt 2-4 on the clamping piece, and then perform welding treatment on the steel belt workpiece with a handheld welding machine. After welding and shaping, knock off the formed steel belt welding part.

[0047] Embodiment:

[0048] In this example, the device of the packaging equipment consists of three parts:

[0049] 1. Steel strip preforming device.

[0050] The steel strip preforming device consists of a conveyor belt 1-1, a pressing oil cylinder 1-2, a cutting oil cylinder 1-3 and a bending device 1-4. In an electronically controlled manner, different steel strips 0-1 can be folded for different stacks. The conveyor belt is composed of six rollers 1-5 and conveys the steel strip forward. When the steel strip 0-1 moves to the specified position, the device starts to bend, and the pressing block 1-6 on the pressing oil cylinder 1-2 presses down the steel strip 0-1. The central axis 1-7 of the bending disc is fixed and serves as the bending fulcrum of the steel strip. The bending disc 1-8 is controlled by a motor 1-9 and rotates a predetermined angle at a predetermined position. The bending round steel 1-10 shapes the steel strip 0-1 by bending. When the bending of the steel strip is completed, the cutting oil cylinder 03 presses down to cut off the steel strip 05.

[0051] 2. Steel strip welding tooling.

[0052] The stack die 2-1 is used to simulate the stack shape. After the preformed steel strip 2-2 is installed and positioned by fitting with the die, the bolts 2-4 on the two clamping pieces 2-3 are tightened. Welding is carried out using a handheld welding machine, and after welding and shaping, the steel strip is gently knocked off.

[0053] 3. Stack encapsulation tooling

[0054] The stack encapsulation tooling has a simple structure and is easy to operate. It consists of a press and two pressing blocks. The upper and lower pressing blocks have the same structure. The pressing block is composed of a fixed block 3-3 and four movable blocks 3-4, and the fixed block and the movable block are connected by bolts 3-4. When starting to load the stack, the lower pressing block 3-1 is placed on the workbench surface 3-5 of the press, the stack 3-6 is placed on the lower pressing block, and the upper pressing block 3-2 is fixed to the upper platen of the press. After the force or displacement is preset on the press, compression starts. Since the membrane electrode of the stack is compressible, small-distance and short-time compression can still be carried out after being compressed to the predetermined size. After re-compression, the welded steel strip 3-7 can easily pass through the stack. At this time, adjust the bolt 3-8 at the connection between the outermost movable block and the fixed block of the pressing block to sleeve the steel strip to the predetermined groove position. After the steel strip is positioned, adjust the bolt at the connection between the movable block and the fixed block to make the movable block return to the initial state. Repeat the above operations until all the steel strips are installed. The press releases the force to complete the stack encapsulation.

Claims

1. A fuel cell stack steel strip packaging device, the membrane electrode of the stack is compressible, characterized in that: The packaging equipment comprises a steel strip welding tool for forming a steel strip welded part (3-7), and also comprises a stack packaging tool; the steel strip welding tool comprises a tightening sheet (2-3) and a stack mold (2-1) matching the shape of a stack packaging area to be packaged; after the pre-formed steel strip workpiece (2-2) is fixed to the forming surface of the stack mold with the tightening sheet (2-3), the steel strip workpiece is welded by a welding machine to be formed into a steel strip welded part for stack packaging; The stack packaging tooling comprises a press and a pressing block structure connected thereto; the pressing block structure comprises an upper pressing block (3-2) and a lower pressing block (3-1) respectively located at the upper side and the lower side of the stack to be packaged; when packaging the stack, the press applies pressure to the stack via the pressing block structure, so that the height of the pressed stack portion is reduced to form a packaging area that can be inserted into a steel strip welded part.

2. A fuel cell stack steel strip packaging device according to claim 1, characterized in that: The preformed steel strip workpiece is formed by processing a steel strip (0-1) through a steel strip preforming device; the steel strip preforming device comprises a conveyor belt (1-1), a pressing cylinder (1-2), a cutting cylinder (1-3) and a bending device (1-4) which are arranged in sequence.

3. A fuel cell stack steel strip packaging device according to claim 2, characterized in that: The conveyor belt comprises a steel belt conveying surface formed by a plurality of rollers (1-5); when the steel belt moves to a specified position of the bending device, the bending device starts to bend the steel belt, and at this time, the pressing block (1-6) on the pressing cylinder presses the steel belt downward; the central axis (1-7) of the bending disk (1-8) of the bending device serves as a bending fulcrum for the steel belt, and the motor (1-9) of the bending device controls the bending disk to rotate at a predetermined angle required for preforming at a predetermined position, and the steel belt is bent and shaped by the bending round steel (1-10); when the bending of the steel belt is completed, the cutting cylinder presses downward to cut the steel belt, thereby forming a preformed steel belt workpiece.

4. A fuel cell stack steel strip packaging device according to claim 3, characterized in that: The bent round steel is adjacent to the central axis of the bending disk; a plurality of steel strip gaps through which the steel strip can pass are provided at the edge of the bending disk. When the steel strip is bent, the starting end of the steel strip passes into the steel strip gap at the edge of the bending disk, so that the steel strip bends toward the bent round steel as the bending disk rotates.

5. A fuel cell stack steel strip packaging device according to claim 1, characterized in that: The upper pressing block and the lower pressing block both comprise a fixed block (3-3) and a plurality of movable blocks (3-4) arranged at intervals on the pressure output surface of the fixed block. The movable blocks of the upper pressing block and the lower pressing block are directly opposite to each other. When packaging the battery stack, the lower pressing block is placed on the working table (3-5) of the press machine, and the battery stack (3-6) is placed on the lower pressing block. The upper pressing block is fixed to the upper pressing plate of the press machine. After the press machine sets the force or displacement in advance, the pressing block structure applies pressure to the battery stack, so that a packaging area that can be inserted into a steel belt welded part is formed at the pressure-bearing battery stack part between adjacent movable blocks. A predetermined slot for inserting the steel belt is provided at the packaging area.

6. A fuel cell stack steel strip packaging device according to claim 5, characterized in that: The fixed block and the movable block are connected via a pressing block bolt (3-8).

7. A fuel cell stack steel strip packaging device according to claim 1, characterized in that: After the preformed steel strip workpiece (2-2) is fixed to the forming surface of the stack mold with a tightening plate (2-3), the tightening plate bolts (2-4) on the tightening plate are tightened first, and then the steel strip workpiece is welded with a handheld welding machine. After the welding is finalized, the formed steel strip welded part is knocked off.

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