Fuel cell stack positioning device and stacking system

Abstract

The present invention discloses a positioning device and stacking system for fuel cell stacking. The positioning device includes: a first positioning frame and a second positioning frame; the first and second positioning frames are formed by splicing a plurality of positioning blocks; each positioning block is provided with a first groove, the width of which matches the width of the fuel cell; the first and second positioning frames are respectively fixed vertically to the bottom end plate on which the fuel cell stack is placed; and the distance between the first and second positioning frames matches the length of the fuel cell. The present invention allows the batteries to be placed within the range defined by the two positioning frames on the bottom end plate during stacking, thereby improving the accuracy of the placement of each single cell group during stacking, thereby ensuring that the sides of the batteries are flush when stacked, further improving the battery's output performance.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a fuel cell stack positioning device and a stacking system. Background Art

[0002] In recent years, the new energy industry has continued to develop, and hydrogen fuel cells have become increasingly widely used. Currently, a fuel cell stack primarily consists of a membrane electrode assembly (MEA), bipolar plates, seals, top and bottom end plates, and fastening screws. Existing technology typically involves manually stacking the individual cell assemblies of the stack in groups. However, using these existing techniques can lead to inaccurate placement of the individual cell groups in the stack, resulting in uneven sides. This, after assembly, affects the stack's sealing and contact properties, ultimately impacting the battery's output performance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect of inaccurate placement of each single battery group in the prior art and to provide a fuel cell stack positioning device and stacking system.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides a positioning device for a fuel cell stack, the positioning device comprising: a first positioning frame, a second positioning frame;

[0006] The first positioning frame and the second positioning frame are formed by splicing a plurality of positioning blocks;

[0007] Each of the positioning blocks is provided with a first groove, the width of the first groove matching the width of the fuel cell;

[0008] The first positioning frame and the second positioning frame are respectively fixed vertically on the bottom end plate where the fuel cell stack is placed;

[0009] The distance between the first positioning frame and the second positioning frame matches the length of the fuel cell.

[0010] Preferably, the positioning device further comprises a first guide rod and a second guide rod;

[0011] Each of the positioning blocks is provided with a second groove matching the first guide rod or the second guide rod;

[0012] A plurality of the positioning blocks are embedded in the second groove through the first guide rod and spliced ​​into the first positioning frame;

[0013] A plurality of the positioning blocks are embedded in the second groove through the second guide rod and spliced ​​into the second positioning frame.

[0014] Preferably, the first guide rod comprises a first section guide rod, a second section guide rod and a first elastic element;

[0015] The second guide rod includes a third section guide rod, a fourth section guide rod and a second elastic element;

[0016] Two ends of the first elastic element are fixedly connected to the first section guide rod and the second section guide rod respectively;

[0017] Two ends of the second elastic element are fixedly connected to the third section guide rod and the fourth section guide rod respectively;

[0018] The minimum distance between the first elastic element and the second elastic element after being compressed is respectively less than a preset threshold.

[0019] Preferably, the elastic element is a spring.

[0020] Preferably, the height of each positioning block is different.

[0021] Preferably, the positioning device further comprises a first fixing plate and a second fixing plate;

[0022] The bottoms of the first fixing plate and the second fixing plate are respectively fixed to the bottom end plate on which the fuel cell stack is placed;

[0023] Side surfaces of the first positioning frame and the second positioning frame are fixedly connected to the first fixing plate and the second fixing plate respectively.

[0024] Preferably, the positioning device further comprises a positioning pin;

[0025] The first positioning frame and the second positioning frame are respectively fixed vertically on the bottom end plate where the fuel cell stack is placed through the positioning pins.

[0026] The present invention also provides a fuel cell stacking system, the stacking system comprising the aforementioned fuel cell stack positioning device, a bottom end plate, and a top end plate;

[0027] The bottom end plate is the end plate for holding the fuel cells when the fuel cells are stacked;

[0028] The top end plate is an end plate placed on the upper surface of the fuel cell stack when the fuel cell stack is assembled.

[0029] The positive progress effect of the present invention is:

[0030] The present invention provides a positioning device and a stacking system for fuel cell stacking. The positioning device is provided with a first positioning frame and a second positioning frame. Each positioning frame is spliced ​​together by a plurality of positioning blocks and is respectively fixed vertically on the bottom end plate where the fuel cell stack is placed. The distance between the two positioning frames is equal to the length of the fuel cell. Each positioning block is provided with a groove, the width of the groove is equal to the width of the fuel cell, so that when the battery is stacked, the battery is placed within the range defined by the two positioning frames on the bottom end plate, thereby improving the accuracy of the placement position of each single battery group when the battery is stacked, so that the sides of the battery are flush when the battery is stacked, and further improving the output performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a first structural schematic diagram of the positioning device for a fuel cell stack in Example 1 of the present invention;

[0032] Figure 2 This is a second structural schematic diagram of the positioning device for fuel cell stacking in Example 1 of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, this embodiment provides a positioning device for a fuel cell stack, the positioning device comprising: a first positioning frame 1, a second positioning frame 2;

[0036] The first and second positioning frames 1 and 2 are assembled from multiple positioning blocks 3. Each positioning block 3 has a first groove whose width matches the width of the fuel cell. The first and second positioning frames 1 and 2 are each vertically fixed to the bottom end plate where the fuel cell stack is placed. The distance between the first and second positioning frames 1 and 2 matches the length of the fuel cell.

[0037] In this embodiment, the positioning device is provided with a first positioning frame 1 and a second positioning frame 2, and the positioning blocks 3 are respectively fixed vertically on the bottom end plate where the fuel cell stack is placed, and the distance between the two positioning frames is equal to the length of the fuel cell. Each positioning block 3 is provided with a groove, the width of which is equal to the width of the fuel cell, so that when the battery is stacked, the battery is placed within the range defined by the two positioning frames on the bottom end plate, thereby improving the accuracy of the placement position of each single battery group when the battery is stacked, so that the sides of the battery are flush when the battery is stacked, further improving the output performance of the battery. In addition, each positioning frame in the positioning device is composed of multiple positioning blocks 3, so that when the battery is stacked, different numbers of positioning blocks 3 can be combined to make the positioning frame have positioning frames of various sizes, so that it can meet the needs of stacking battery stacks of different heights, thereby improving the flexibility and convenience of battery stacking.

[0038] In one embodiment, the positioning device further includes a first guide rod 4 and a second guide rod. Each positioning block 3 is provided with a second groove that matches the first guide rod 4 or the second guide rod. Multiple positioning blocks 3 are assembled into a first positioning frame 1 by inserting the first guide rod 4 into the second groove. Multiple positioning blocks 3 are assembled into a second positioning frame 2 by inserting the second guide rod into the second groove.

[0039] In this embodiment, the positioning device is provided with two guide rods and a groove matching the guide rod on each positioning block 3. The guide rod is embedded in the groove of multiple positioning blocks 3 to splice multiple positioning blocks 3 into a guide rod, so that all positioning blocks 3 can be on the same vertical plane along the guide rod, thereby ensuring that the inner surface of the positioning frame spliced ​​by multiple positioning blocks 3 is flat, and thus the sides are flush when the batteries are stacked.

[0040] In one embodiment, the first guide rod 4 includes a first guide rod section 41, a second guide rod section 42, and a first elastic element 43. The second guide rod has the same structure as the first guide rod, including a third guide rod section, a fourth guide rod section, and a second elastic element. The first elastic element 43 is fixedly connected to the first and second guide rod sections 41, 42 at both ends; the second elastic element is fixedly connected to the third and fourth guide rod sections at both ends. The minimum distance between the first and second elastic elements after compression is less than a preset threshold. Specifically, the elastic element may be a spring.

[0041] In this embodiment, the two guide rods are each divided into three sections, one of which is an elastic element. The elastic element connects the other two guide rods, allowing the guide rods to be retractable. This ensures that when different numbers of positioning blocks 3 are combined to form positioning racks of different heights during battery stacking, the guide rods can change height accordingly, thereby meeting the requirements of battery stacking. In addition, the minimum distance after the elastic elements are compressed is less than a preset threshold, ensuring that the height of the guide rods is equal to the height of the battery stack when the battery stack height is minimum. For example, when stacking batteries, after the last group of batteries is placed and the top end plate is placed on the top end surfaces of the two positioning racks, the press pre-presses the battery stack by acting on the top end plate. After each battery is lowered a certain distance due to the force, each positioning rack removes a certain number of positioning blocks 3, and then continues to press the battery stack downward. This cycle is repeated, with a certain interval each time. When the battery stack reaches the required pressure and height, the press stops. Among them, when a certain number of positioning blocks 3 need to be removed from each positioning frame, the height of the positioning frame will change. As a result, the length of the elastic element of the guide rod will become shorter under the action of pressure, and the height of the guide rod will also become shorter, meeting the requirements for pre-stressing of the battery stack.

[0042] In one embodiment, the height of each positioning block 3 is different. For example, the height of the positioning block 3 can be 1 cm, 5 cm, 10 cm, etc. The specific size can be selected according to the actual use needs of the user.

[0043] In this embodiment, by setting the positioning blocks 3 to different heights, positioning frames of different heights can be combined by positioning blocks 3 of different sizes, thereby further improving the flexibility of adjusting the height of the positioning frame, thereby being able to meet the needs of stacking batteries of various specifications, and further improving the flexibility and convenience of battery stacking.

[0044] In one practicable embodiment, the positioning device further includes a first fixing plate 5 and a second fixing plate 6; the bottoms of the first fixing plate 5 and the second fixing plate 6 are respectively fixed on the bottom end plate on which the fuel cell stack is placed; the side surfaces of the first positioning frame 1 and the second positioning frame 2 are respectively fixedly connected to the first fixing plate 5 and the second fixing plate 6.

[0045] In this embodiment, fixing plates are provided on the sides of the two positioning frames so that the positioning frames can be more firmly fixed to the bottom end plate, thereby improving the stability of the two positioning frames during battery stacking and ensuring the quality of the battery stacking.

[0046] In one practicable embodiment, the positioning device further includes positioning pins 7 ; the first positioning frame 1 and the second positioning frame 2 are respectively fixed vertically to the bottom end plate where the fuel cell stack is placed via the positioning pins 7 .

[0047] In this embodiment, the two positioning frames are fixed to the bottom end plate where the fuel cell stack is placed by positioning pins 7. The fixing method of the positioning pins 7 is simple in structure and convenient in connection, making the device easy to disassemble and install, thereby improving the convenience of subsequent maintenance of the device.

[0048] This embodiment discloses a positioning device for fuel cell stacking, wherein the positioning device is provided with a first positioning frame 1 and a second positioning frame 2, which are respectively fixed vertically on the bottom end plate where the fuel cell stack is placed, and the distance between the two positioning frames is equal to the length of the fuel cell, and each positioning block 3 is provided with a groove, the width of which is equal to the width of the fuel cell, so that when the battery is stacked, the battery is placed within the range defined by the two positioning frames on the bottom end plate, thereby improving the accuracy of the placement position of each single battery group when the battery is stacked, thereby making the sides of the battery flush when the battery is stacked, further improving the output performance of the battery. In addition, each positioning frame in the positioning device is composed of a plurality of positioning blocks 3, and further, the positioning blocks 3 can be of different heights, so that when the battery is stacked, different numbers of positioning blocks 3 of different specifications can be combined to provide positioning frames of various sizes, thereby being able to meet the requirements of stacking battery stacks of different heights, thereby improving the flexibility and convenience of battery stacking. At the same time, the two guide rods are divided into three sections, one of which is an elastic element that allows the guide rods to be retracted. This ensures that when the batteries are stacked, when different numbers of positioning blocks 3 are required to form positioning racks of different heights, the guide rods can change height accordingly, thereby meeting the requirements of battery stacking. Secondly, the positioning racks also improve the stability of the two positioning racks when the batteries are stacked by providing fixing plates on the sides of the two positioning racks, thereby ensuring the quality of the battery stack. And the positioning racks are fixed to the top end plate through positioning pins 7, making the device easy to disassemble and install, thereby improving the convenience of the device's later maintenance.

[0049] Example 2

[0050] This embodiment provides a fuel cell stacking system, the stacking system comprising the fuel cell stacking positioning device of embodiment 1, a bottom end plate, and a top end plate;

[0051] Among them, the bottom end plate is the end plate that holds the battery when the fuel cell is stacked; the top end plate is the end plate placed on the upper surface of the fuel cell stack when the fuel cell is stacked.

[0052] The positioning device in this embodiment adopts the positioning device in Example 1.

[0053] This embodiment discloses a fuel cell stacking system, which includes a positioning device, a bottom end plate and a top end plate. The positioning device adopts the positioning device in Example 1, thereby improving the accuracy of the placement of each single battery group when the battery is stacked, so that the sides of the battery are flush when the battery is stacked, further improving the output performance of the battery.

[0054] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A fuel cell stack positioning device, characterized in that: The positioning device includes: a first positioning frame and a second positioning frame; The first positioning frame and the second positioning frame are formed by splicing a plurality of positioning blocks; Each of the positioning blocks is provided with a first groove, the width of the first groove matching the width of the fuel cell; The first positioning frame and the second positioning frame are respectively fixed vertically on the bottom end plate where the fuel cell stack is placed; The distance between the first positioning frame and the second positioning frame matches the length of the fuel cell; The positioning device further includes a first guide rod and a second guide rod; Each of the positioning blocks is provided with a second groove matching the first guide rod or the second guide rod; A plurality of the positioning blocks are embedded in the second groove through the first guide rod and spliced ​​into the first positioning frame; A plurality of the positioning blocks are embedded in the second groove through the second guide rod and spliced ​​into the second positioning frame.

2. The fuel cell stack positioning device according to claim 1, characterized in that: The first guide rod includes a first section guide rod, a second section guide rod and a first elastic element; The second guide rod includes a third section guide rod, a fourth section guide rod and a second elastic element; Two ends of the first elastic element are fixedly connected to the first section guide rod and the second section guide rod respectively; Two ends of the second elastic element are fixedly connected to the third section guide rod and the fourth section guide rod respectively; The minimum distance between the first elastic element and the second elastic element after being compressed is respectively less than a preset threshold.

3. The fuel cell stack positioning device according to claim 2, wherein: The elastic element is a spring.

4. The fuel cell stack positioning device according to claim 1, wherein: The heights of the positioning blocks are different.

5. The fuel cell stack positioning device according to claim 1, wherein: The positioning device further includes a first fixing plate and a second fixing plate; The bottoms of the first fixing plate and the second fixing plate are respectively fixed to the bottom end plate on which the fuel cell stack is placed; Side surfaces of the first positioning frame and the second positioning frame are fixedly connected to the first fixing plate and the second fixing plate respectively.

6. The fuel cell stack positioning device according to claim 1, wherein: The positioning device also includes a positioning pin; The first positioning frame and the second positioning frame are respectively fixed vertically on the bottom end plate where the fuel cell stack is placed through the positioning pins.

7. A fuel cell stacking system, characterized in that: The stacking system comprises a fuel cell stack positioning device according to any one of claims 1 to 6, a bottom end plate and a top end plate; The bottom end plate is the end plate for holding the fuel cells when the fuel cells are stacked; The top end plate is an end plate placed on the upper surface of the fuel cell stack when the fuel cell stack is assembled.

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