Adjustable fuel cell medium and long stack packaging structure

Abstract

The utility model relates to the field of fuel cells, in particular to an adjustable fuel cell medium and long stack packaging structure, which comprises a rear metal plate and a front metal plate, the rear metal plate and the front metal plate are connected through a plurality of length adjusting bolts, the length of the rear metal plate and the length of the front metal plate are adjusted, and a fuel cell stack is clamped between the rear metal plate and the front metal plate; two ends of the composite connecting rods are respectively connected with the rear metal plate and the front metal plate, and the inner sides of the composite connecting rods elastically extrude the fuel cell stack. The length of the whole pile can be adjusted through the threads on the bolts. The upper insulating material of the composite connecting rod is selected according to the widths and heights of different electric piles to be matched with the electric piles, and as the kidney-shaped holes are formed in the two ends of the composite connecting rod, the composite connecting rod is connected with the rear metal plate through the fastening flange nuts, and the fastening screws are connected with the front metal plate, the composite connecting rod can adapt to the lengths, widths and heights of different electric piles, and the problems of waist collapse and insulation of the electric core are avoided.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, in particular to an adjustable fuel cell medium and long stack packaging structure. Background Art

[0002] The fuel cell packaging structure is used to fix the battery cells composed of multiple sets of bipolar plates and membrane electrodes. It bears the reaction force after the fuel cell cells are pressed into the stack and prevents the long battery cells from deforming after being pressed. The battery cells composed of bipolar plates and membrane electrodes of different lengths, widths and thicknesses require different packaging structures for packaging. The existing battery stack packaging structure can package the battery stack. It clamps the long battery cells through the end plates on both sides and multiple connecting rods in the middle. This structure can adjust the packaging length of the battery stack through the long threads on the connecting rods, such as Figure 1 shown.

[0003] Although the packaging structure of the original battery stack can be used for battery cells of different lengths, it cannot effectively prevent the battery stack from collapsing due to excessive length of the battery cells, and cannot be used for battery cells of different widths and heights. Utility Model Content

[0004] The purpose of the utility model is to address the problems in the background technology that the battery stack cannot effectively prevent the collapse caused by the excessive length of the battery cells and cannot be used for battery cells of different widths and heights, and to propose an adjustable fuel cell medium and long stack packaging structure.

[0005] The technical solution of the utility model is: an adjustable fuel cell medium and long stack packaging structure, including a rear metal plate and a front metal plate, the rear metal plate and the front metal plate are connected and adjusted in length by multiple length adjustment bolts, and a fuel cell stack is clamped between the rear metal plate and the front metal plate; it also includes a composite connecting rod, the two ends of the composite connecting rod are respectively connected to the rear metal plate and the front metal plate, a plurality of composite connecting rods are provided, and the inner side of the composite connecting rod elastically squeezes the fuel cell stack.

[0006] Preferably, twelve length adjustment bolts are provided in total, with four respectively distributed on the upper and lower sides of the rear metal plate and two respectively distributed on both sides.

[0007] Preferably, a total of six composite connecting rods are provided, wherein two composite connecting rods are respectively distributed on the upper and lower sides of the fuel cell stack, and one composite connecting rod is respectively distributed on the left and right sides of the fuel cell stack.

[0008] Preferably, one end of the composite connecting rod is connected to the rear metal plate via a vertical fastening flange nut, and the other end of the composite connecting rod is connected to the front metal plate via a horizontal fastening screw.

[0009] Preferably, waist-shaped holes are provided at both ends of the composite connecting rod, and the fastening flange nuts pass through the waist-shaped holes and are connected to the rear metal plate.

[0010] Preferably, the composite connecting rod is formed by combining a metal layer and an elastic layer to form a double-layer structure, wherein the side that abuts against the fuel cell stack is the elastic layer.

[0011] Preferably, the fastening flange nut connects the rear metal plate and the metal layer of the composite connecting rod, and the fastening screw connects the front metal plate and the metal layer of the composite connecting rod.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: first, the front metal plate, the fuel cell stack, and the rear metal plate are stacked in order from top to bottom, and then a compressive force is applied to complete the extrusion. When packaging the fuel cell stack, twelve length adjustment bolts are first passed through the rear metal plate and fastened to the front metal plate. The length of the entire stack can be adjusted by the threads on the bolts. Then, the upper insulating material of the composite connecting rod is selected to match the different widths and heights of the fuel cell stack. Since there are waist holes at both ends of the composite connecting rod, it is connected to the rear metal plate by tightening the flange nut and connected to the front metal plate by tightening the screws. It can adapt to the length, width, and height of different fuel cell stacks, and avoids the problems of sagging waist and insulation of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the packaging structure of the prior art;

[0014] Figure 2 This is a structural diagram of an embodiment of the utility model;

[0015] Figure 3 Schematic diagram of the structure of the composite connecting rod.

[0016] Figure numerals: 1. fastening flange nut; 2. rear metal plate; 3. length adjustment bolt; 4. composite connecting rod; 5. fastening screw; 6. front metal plate. DETAILED DESCRIPTION

[0017] Example 1

[0018] like Figure 2-Figure 3 As shown, the utility model proposes an adjustable fuel cell medium and long stack packaging structure, including a rear metal plate 2 and a front metal plate 6, the rear metal plate 2 and the front metal plate 6 are connected and length-adjusted by multiple length-adjusting bolts 3, and a fuel cell stack is sandwiched between the rear metal plate 2 and the front metal plate 6; it also includes a composite connecting rod 4, the two ends of the composite connecting rod 4 are respectively connected to the rear metal plate 2 and the front metal plate 6, a plurality of composite connecting rods 4 are provided, and the inner side of the composite connecting rod 4 elastically squeezes the fuel cell stack.

[0019] The distance between the rear metal plate 2 and the front metal plate 6 is adjusted by the length adjusting bolt 3 to adapt to fuel cell stacks of different lengths. By selecting composite connecting rods 4 of different sizes, it can adapt to fuel cell stacks of different widths and heights. The composite connecting rod 4 can provide support for the fuel cell stack to prevent the stack from collapsing due to the excessive length of the battery cell.

[0020] Example 2

[0021] like Figure 2-Figure 3 As shown, the present invention proposes an adjustable fuel cell medium and long stack packaging structure. Compared with the first embodiment, this embodiment introduces the detailed structure in detail.

[0022] Twelve length adjustment bolts 3 are provided, four on the top and bottom of the rear metal plate 2, and two on each side. Six composite connecting rods 4 are provided, two on the top and bottom sides of the fuel cell stack, and one on each left and right side of the fuel cell stack. One end of the composite connecting rod 4 is connected to the rear metal plate 2 via a vertical fastening flange nut 1, and the other end is connected to the front metal plate 6 via a horizontal fastening screw 5. Waist-shaped holes are provided at both ends of the composite connecting rod 4, through which the fastening flange nuts 1 pass to connect to the rear metal plate 2. The waist-shaped holes allow the installation position of the composite connecting rod 4 to be adjusted within a certain range. The composite connecting rod 4 is a double-layer structure composed of a metal layer and an elastic layer. The elastic layer is placed on the side that contacts the fuel cell stack to prevent electrical conductivity when in contact with the fuel cell stack. The fastening flange nut 1 connects the metal layer of the rear metal plate 2 to the composite connecting rod 4, and the fastening screw 5 connects the metal layer of the front metal plate 6 to the composite connecting rod 4.

[0023] In summary, when the present invention is used, the front metal plate 6, the fuel cell stack, and the rear metal plate 2 are first stacked in order from top to bottom, and then a compressive force is applied to complete the extrusion. When packaging the stack, twelve length adjustment bolts 3 are first passed through the rear metal plate 2 and fastened to the front metal plate 6. The length of the entire stack can be adjusted by the threads on the bolts. Then, the upper insulating material of the composite connecting rod 4 is selected to match the different widths and heights of the stack. Since there are waist holes at both ends of the composite connecting rod 4, it is connected to the rear metal plate 2 by tightening the flange nut 1, and connected to the front metal plate 6 by tightening the screw 5. It can adapt to the length, width, and height of different stacks, and avoids the problems of sagging waist and insulation of the battery cell.

[0024] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. An adjustable fuel cell medium and long stack packaging structure, comprising a rear metal plate (2) and a front metal plate (6), wherein the rear metal plate (2) and the front metal plate (6) are connected by a plurality of length adjustment bolts (3) and the length is adjusted, and a fuel cell stack is sandwiched between the rear metal plate (2) and the front metal plate (6); characterized in that: It also includes a composite connecting rod (4), the two ends of which are respectively connected to the rear metal plate (2) and the front metal plate (6), a plurality of composite connecting rods (4) are provided, and the inner side of the composite connecting rod (4) elastically squeezes the fuel cell stack.

2. The adjustable fuel cell medium and long stack packaging structure according to claim 1, characterized in that: Twelve length adjustment bolts (3) are provided in total, four of which are respectively distributed on the upper and lower sides of the rear metal plate (2) and two on both sides.

3. The adjustable fuel cell medium and long stack packaging structure according to claim 1, characterized in that: A total of six composite connecting rods (4) are provided, wherein two composite connecting rods (4) are respectively distributed on the upper and lower sides of the fuel cell stack, and one composite connecting rod (4) is respectively distributed on the left and right sides of the fuel cell stack.

4. The adjustable fuel cell medium and long stack packaging structure according to claim 1, characterized in that: One end of the composite connecting rod (4) is connected to the rear metal plate (2) through a vertical fastening flange nut (1), and the other end of the composite connecting rod (4) is connected to the front metal plate (6) through a horizontal fastening screw (5).

5. The adjustable fuel cell medium and long stack packaging structure according to claim 4, characterized in that: Waist-shaped holes are provided at both ends of the composite connecting rod (4), and the fastening flange nuts (1) pass through the waist-shaped holes and are connected to the rear metal plate (2).

6. The adjustable fuel cell medium and long stack packaging structure according to claim 4, characterized in that: The composite connecting rod (4) is formed by combining a metal layer and an elastic layer to form a double-layer structure, wherein the side that abuts against the fuel cell stack is the elastic layer.

7. The adjustable fuel cell medium and long stack packaging structure according to claim 6, characterized in that: The fastening flange nut (1) connects the rear metal plate (2) and the metal layer of the composite connecting rod (4), and the fastening screw (5) connects the front metal plate (6) and the metal layer of the composite connecting rod (4).

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