A simple tool for external positioning of fuel cell stack assembly

Abstract

The utility model relates to the technical field of fuel cells, and specifically to a simple tool for external positioning of a fuel cell stack assembly. The simple tool for external positioning includes a base, on which a fuel cell stack is placed, and the fuel cell stack includes a lower end plate and an upper end plate, and is characterized in that: a clamping and fixing mechanism is provided on the base, and the fuel cell stack is located in the clamping and fixing mechanism, one side of the clamping and fixing mechanism is a fixed positioning rod, and the bottom end of the fixed positioning rod is connected to the base, and the other side of the clamping and fixing mechanism is a movable positioning rod assembly, and the bottom of the movable positioning rod assembly is slidably matched with the base, and the movable positioning rod assembly includes a movable positioning rod, and the top of the movable positioning rod and the top of the fixed positioning rod are connected by a tensioning screw rod, and the tensioning screw rod is provided with a hand wheel 2 at one end of the movable positioning rod; the clamping and fixing mechanisms are multiple, and the multiple clamping and fixing mechanisms realize the adjustment of the size of the internal space of the tooling to adapt to the external positioning of fuel cells of different sizes, and the structure is simple and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a simple external positioning tool for assembling a fuel cell stack. Background Art

[0002] Proton exchange membrane fuel cells use hydrogen as fuel and convert the chemical energy in the fuel into electrical energy through redox reactions with oxygen in the air. The general structure of proton exchange membrane fuel cells consists of bipolar plates, membrane electrodes and some sealing components that are repeatedly stacked to form a battery stack containing a large number of single battery units. At present, large-scale fuel cell manufacturers all use battery stack assembly production lines, using manipulators and visual positioning to first place the bipolar plate with seals from above into an external positioning tool with fixed positioning rods around it, then put in the membrane electrode, and then put in the bipolar plate, and repeat this stacking to form a battery stack containing a large number of single battery units. Due to the use of manipulators, visual positioning and external positioning tools, the battery stack can be stacked very neatly. At present, many battery manufacturers and laboratories still assemble battery stacks manually. If an external positioning tool with fixed positioning rods on all sides is used, it will be very inconvenient to stack them manually, and an external positioning tool with fixed positioning rods can only assemble battery stacks with bipolar plates of one size. There is also a right-angle inclined positioning tool that uses the gravity of the bipolar plate to fix it close to the right-angle surface, but a special inclined press is required to assemble the battery stack.

[0003] The shortcomings of the above technical solutions are: the external positioning and right-angle tilt positioning tooling with fixed positioning rods around is not suitable for assembling fuel cell stacks in flexible places such as laboratories and fuel cell maintenance sites, and is not universal for fuel cell stacks of different models and sizes. The tooling is bulky and expensive. Therefore, it is very necessary to study and design a simple external positioning tooling for fuel cell stack assembly that is universal for fuel cell stacks of different models and sizes. Utility Model Content

[0004] The problem to be solved is to provide a simple external positioning tool for assembling a fuel cell stack, which can be used to assemble the stack in flexible locations such as maintenance sites, and is universally applicable to the assembly of fuel cell stacks of different models and sizes.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a simple external positioning tool for assembling a fuel cell stack, the simple external positioning tool comprising a base, a fuel cell stack is placed on the base, the fuel cell stack comprises a lower end plate and an upper end plate, a clamping and fixing mechanism is provided on the base, the fuel cell stack is located in the clamping and fixing mechanism, one side of the clamping and fixing mechanism is a fixed positioning rod, the bottom end of the fixed positioning rod is connected to the base, the other side of the clamping and fixing mechanism is a movable positioning rod assembly, the bottom of the movable positioning rod assembly is slidably matched with the base, the movable positioning rod assembly comprises a movable positioning rod, the top of the movable positioning rod and the top of the fixed positioning rod are connected by a tensioning screw rod, and the tensioning screw rod is provided with a hand wheel 2 at one end of the movable positioning rod; there are multiple clamping and fixing mechanisms.

[0006] Preferably, a T-shaped slider perpendicular to the movable positioning rod is provided at the bottom of the movable positioning rod, one end of the T-shaped slider away from the movable positioning rod is connected to the screw-in assembly, and a T-shaped slot cooperating with the T-shaped slider is provided on the base.

[0007] Preferably, the screw-in assembly includes one end of a tightening screw connected to the T-shaped slider, and the other end of the tightening screw passes through a screw nut and is connected to a handwheel.

[0008] Preferably, the limiting sleeve is arranged outside the tensioning screw rod and is located between the movable positioning rod and the fixed positioning rod.

[0009] Preferably, the plurality of clamping and fixing mechanisms are distributed on the front and rear end surfaces and the left and right end surfaces of the fuel cell stack.

[0010] Preferably, the upper end plate is provided with an upper end plate groove, and the upper end plate is clamped with the clamping and fixing mechanism through the upper end plate groove; and the lower end plate is clamped with the clamping and fixing mechanism.

[0011] Compared with the prior art, the utility model provides a simple external positioning tool for assembling a fuel cell stack, which has the following beneficial effects:

[0012] 1. The utility model adopts the method of simultaneously tightening and correcting the battery stack from top to bottom, so it has the characteristics of good positioning effect, simple structure and low cost;

[0013] 2. The utility model has a wide range of applications. The relatively arranged movable positioning rod assembly and the fixed positioning rod adjust the internal space of the tooling, and are suitable for battery stacks of different models and sizes;

[0014] 3. The utility model is applicable to various scenarios and can be used in simple and flexible venues. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front schematic diagram of the utility model tooling.

[0016] Figure 2 It is a schematic diagram of the back side of the tooling of the utility model.

[0017] Figure 3 It is a top view of the base involved in the tooling of the utility model.

[0018] Figure 4 It is a schematic diagram of a movable positioning rod assembly involved in the tooling of the utility model.

[0019] Figure 5 It is a schematic diagram of a battery stack after being positioned using the tooling of the utility model.

[0020] Explanation of the reference numerals: 1. Base; 11. T-slot; 12. Connecting slot; 2. Clamping and fixing mechanism; 3. Battery stack; 31. Lower end plate; 32. Upper end plate; 321. Upper end plate groove; 4. Movable positioning rod assembly; 41. Movable positioning rod; 411. Lower end plate slot one; 42. T-slider; 43. Tightening screw; 44. Screw nut; 45. Handwheel one; 46. Handwheel two; 5. Fixed positioning rod; 51. Lower end plate slot two; 6. Tensioning screw; 7. Limiting tube. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiment of the present invention will be described below in conjunction with the accompanying drawings in the embodiment of the present invention:

[0022] As shown in the figure, a simple tool for external positioning of a fuel cell stack assembly includes a base 1, a fixed positioning rod 5, a movable positioning rod assembly 4, a tensioning screw 6, and a limiting tube 7. The fixed positioning rod 5 and the movable positioning rod assembly 4 are arranged in a group, and the fixed positioning rod 5 and the movable positioning rod assembly 4 constitute a clamping and fixing mechanism 2; the base 1 is machined from a rectangular thick steel plate, and the back bottom portion of the base 1 is designed to be hollow for weight reduction. The base 1 is provided with three clamping and fixing mechanisms 2, a T-slot 11 is provided on the left end face of the base 1 near the battery stack 3, two T-slots 11 are provided on the front end face of the base 1 near the battery stack 3, the T-slot 11 is used to slide and connect the movable positioning rod assembly 4, a plurality of thread holes for fastening screws to pass through are provided on both sides of the T-slot 11, opposite to the T-slot 11 is a connecting groove 12, the connecting groove 12 is used to connect the bottom end of the fixed positioning rod 5 and make the fixed positioning rod 5 perpendicular to the upper and lower end faces of the base 1, and two thread holes are provided on the top of the fixed positioning rod 5; the movable positioning rod assembly 4 includes a movable positioning rod 41, a T-sliding block 42, a tightening screw 43, a screw nut 44, and a handwheel 45, one end of the movable positioning rod 41 is fixedly connected to the T-sliding block 42 The other end is provided with two through holes, one end of the tightening screw 43 is a ball head structure, which is floatingly connected to the T-shaped slider 42, the middle part of the tightening screw 43 cooperates with the screw nut 44, and the opposite end of the ball head structure of the tightening screw 43 is connected to the hand wheel 45. After the movable positioning rod assembly 4 is assembled, the movable positioning rod 41 and the T-shaped slider 42 fixed together are first placed in the T-slot 11 on the base 1, one end of the tightening screw 43 is installed in the T-slot 42, the screw nut 44 is sleeved on the tightening screw 43, and the hand wheel 45 is installed at the other end of the tightening screw 43, and then the screw nut 44 is fixed to the position where the T-slot 11 is on the side of the base 1 with a fastening screw, and the fastening screw is installed in the wire hole next to the T-slot 11.

[0023] like Figure 1As shown, the left and right end faces of the battery stack 3 are clamped in the clamping and fixing mechanism 2, and the front and rear end faces of the battery stack 3 are clamped in two clamping and fixing mechanisms 2 arranged at intervals. A tensioning screw rod 6 can also be arranged in the clamping and fixing mechanism 2. A handwheel 2 46 is installed at one end of the tensioning screw rod 6 close to the movable positioning rod 41, and the other end passes through the through hole at the upper end of the movable positioning rod 41 and enters the thread hole at the upper end of the fixed positioning rod 5, which is used to tighten and correct the left and right end faces of the battery stack 3 and the front and rear end faces of the battery stack 3.

[0024] In order to better adjust the neatness of the battery stack 3 and avoid squeezing the battery stack 3 by over-tightening, a limit tube 7 is sleeved on the tensioning screw rod 6, and the limit tube 7 is located between the corresponding movable positioning rod 41 and the fixed positioning rod 5. The length of the limit tube 7 between the left and right end faces of the battery stack 3 is equal to or slightly greater than the distance between the left and right end faces of the battery stack 3, and the length of the limit tube 7 between the front and rear end faces of the battery stack 3 is equal to or slightly greater than the distance between the front and rear end faces of the battery stack 3. The inner diameter of the limit tube 7 is greater than the outer diameter of the tensioning screw rod 6; the limit tube 7 is made of steel or plastic.

[0025] The lower end plate 31 and the upper end plate 32 located at both ends of the battery stack 3 are one circle larger than the bipolar plate. In order to better meet the requirements of the neatness of the battery stack 3, each set of fixed positioning rods 5 and movable positioning rods 41 of the clamping and fixing mechanism are provided with grooves for clamping the part of the lower end plate 31 that exceeds the bipolar plate. The position where the lower end of the fixed positioning rod 5 contacts the lower end plate 31 has a lower end plate clamping groove 2 51, and the position where the lower end of the movable positioning rod 41 contacts the lower end plate 31 has a lower end plate clamping groove 1 411; a plurality of upper end plate grooves 321 are provided on the upper end plate 32 to adapt to battery stacks of different heights, and the upper end plate grooves 321 can clamp the fixed positioning rod 5 or the movable positioning rod 41 at the corresponding position.

[0026] The method of using a simple tool for external positioning of a fuel cell stack assembly described in the utility model is: first, rotate the hand wheel 1 45 to expand the space for stack assembly and stacking; according to the stack assembly process, sequentially lower the end plate 31 and the current collector, repeatedly stack the bipolar plate, the membrane electrode, and then the current collector, and finally put the end plate 32; when the stack 3 reaches the specified number of sections, the operation is divided into steps 1 and 2. Step 1: on the base 1, rotate the hand wheel 1 45 in sequence to make the movable positioning rod 41 close to the stack 3; after one end of the tensioning screw rod 6 passes through the through hole on the movable positioning rod 41, the upper limit tube 7 is put on and finally passes through the thread hole on the fixed positioning rod 5, and the other end of the tensioning screw rod 6 is installed on the hand wheel 2 46. Step 2: rotate the hand wheel 1 45 and the hand wheel 2 46 in sequence to slowly tighten and correct the left and right end faces and the front and rear end faces of the stack 3; until the end face flatness requirements of the stack 3 are met, then tighten the fastening screws on the base 1 to fix the movable positioning rod assembly 4, and finally enter the stack 3 pressing and bolt or binding belt fastening process.

[0027] The above embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A simple external positioning tool for assembling a fuel cell stack, the simple external positioning tool comprising a base (1), a fuel cell stack (3) is placed on the base (1), the fuel cell stack (3) comprises a lower end plate (31) and an upper end plate (32), characterized in that: A clamping and fixing mechanism (2) is provided on the base (1), and the battery stack (3) is located in the clamping and fixing mechanism (2). One side of the clamping and fixing mechanism (2) is a fixed positioning rod (5), and the bottom end of the fixed positioning rod (5) is connected to the base (1). The other side of the clamping and fixing mechanism (2) is a movable positioning rod assembly (4), and the bottom of the movable positioning rod assembly (4) is slidably matched with the base (1). The movable positioning rod assembly (4) includes a movable positioning rod (41), and the top of the movable positioning rod (41) and the top of the fixed positioning rod (5) are connected by a tensioning screw (6). The tensioning screw (6) is provided with a hand wheel (46) at one end of the movable positioning rod (41); the clamping and fixing mechanism (2) is a plurality of.

2. A fuel cell stack assembly external positioning simple tool as claimed in claim 1, characterized in that: A T-shaped slider (42) perpendicular to the movable positioning rod (41) is provided at the bottom of the movable positioning rod (41); one end of the T-shaped slider (42) away from the movable positioning rod (41) is connected to the screw-in assembly; and a T-shaped slot (11) matching with the T-shaped slider (42) is provided on the base (1).

3. A fuel cell stack assembly external positioning simple tool as claimed in claim 2, characterized in that: The screw-in assembly comprises one end of a tightening screw (43) connected to a T-shaped slide block (42), and the other end of the tightening screw (43) passes through a screw nut (44) and is connected to a hand wheel (45).

4. A fuel cell stack assembly external positioning simple tool as claimed in claim 1, characterized in that: The limiting tube (7) is sleeved on the outside of the tensioning screw rod (6) and is located between the movable positioning rod (41) and the fixed positioning rod (5).

5. A fuel cell stack assembly external positioning simple tool as claimed in claim 4, characterized in that: The plurality of clamping and fixing mechanisms (2) are distributed on the front and rear end surfaces and the left and right end surfaces of the battery stack (3).

6. A fuel cell stack assembly external positioning simple tool as claimed in claim 1, characterized in that: The upper end plate (32) is provided with an upper end plate groove (321), and the upper end plate (32) is clamped with the clamping and fixing mechanism (2) via the upper end plate groove (321); and the lower end plate (31) is clamped with the clamping and fixing mechanism (2).

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