Pressing mechanism and battery stack pressing device having the same

Abstract

The utility model provides a press-fitting mechanism and a battery stack press-fitting device having the same, the press-fitting mechanism is used to press-fit the end plate and the battery unit, the press-fitting mechanism includes a press plate, the press plate can drive the end plate to move toward the battery unit, the end plate is arranged between the press plate and the battery unit, the press plate is used to abut against the end plate, and a positioning structure is arranged on one side of the press plate facing the end plate to limit the horizontal displacement of the end plate relative to the press plate. The technical solution provided by the utility model can solve the problem of inaccurate positioning of the blind end plate at the top during the press-fitting process of the fuel cell in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and in particular to a press-fitting mechanism and a fuel cell stack press-fitting device having the same. Background Art

[0002] A fuel cell is composed of multiple battery cells. A sealing structure needs to be set between each two adjacent battery cells to ensure the sealing of the fuel cell. Therefore, a certain pressing force is required during the assembly process of the fuel cell to ensure the sealing and electrical contact of the reaction area. In the prior art, end plates are usually set at both ends of the fuel cell to control the contact pressure and provide contact pressure inside the core. After the fuel cell stack is completed, a stack pressing device is required for pressing.

[0003] In the prior art, before the fuel cell is pressed, the end plate at the bottom of the battery and the battery unit need to be placed on the pressing platform of the stack pressing device, and then the top blind end plate is manually placed on the battery unit for pressing. This processing results in poor placement consistency of the end plate. If the placement deviation is large, the fuel cell may be subjected to uneven force in the height direction during pressing, causing the battery unit to slip laterally, affecting the sealing performance and working performance of the fuel cell. Utility Model Content

[0004] The utility model provides a press-fitting mechanism and a battery stack press-fitting device having the same, so as to solve the problem in the prior art that during the press-fitting process of the fuel cell, the blind end plate at the top is not accurately positioned when placed.

[0005] According to one aspect of the utility model, a press-fitting mechanism is provided, which is used to press-fit the end plate and the battery cell. The press-fitting mechanism includes: a press plate, which can drive the end plate to move toward the battery cell, the press plate is used to abut against the end plate, and a positioning structure is provided on the side of the press plate facing the end plate to limit the horizontal displacement of the end plate relative to the press plate.

[0006] Furthermore, the positioning structure includes a positioning pin, which is arranged on the pressure plate, and a positioning hole is arranged on the end plate. The positioning hole is arranged corresponding to the positioning pin, and the positioning hole is used to accommodate the positioning pin.

[0007] Furthermore, a plurality of positioning pins and a plurality of positioning holes are provided, and the plurality of positioning pins and the plurality of positioning holes are provided in a one-to-one correspondence.

[0008] Furthermore, a plurality of positioning pins are staggered along the extension direction of the pressing plate.

[0009] Furthermore, the pressing mechanism also includes: a clamping assembly, the clamping assembly includes two clamps, the two clamps are relatively arranged at the two ends of the pressing plate, the clamps can move relative to the pressing plate, and the two clamps are used to clamp and release the end plate.

[0010] Furthermore, one end of the clamping plate close to the end plate has a protrusion, and the protrusions of the two clamping plates are arranged facing each other. The protrusions abut against the end surface of the end plate facing the battery unit to limit the displacement of the end plate in the height direction.

[0011] Furthermore, the clamping assembly also includes: a first driving part, the first driving part has a telescopic end, the telescopic end is drivingly connected to an end of the clamping plate away from the end plate, and the first driving part is used to drive the clamping plate to move in the horizontal direction relative to the pressure plate.

[0012] Furthermore, the first driving part includes: a cylinder, which is arranged on the pressure plate; a telescopic rod, which is drive-connected to the cylinder and extends in the horizontal direction, and the end of the telescopic rod away from the cylinder forms a telescopic end. The telescopic rod can drive the splint to move in the horizontal direction under the drive of the cylinder.

[0013] Furthermore, a guide hole is provided on the clamping plate, and the clamping assembly further comprises: a guide rod, the guide rod is arranged on the side wall of the pressure plate, and the guide rod is inserted into the guide hole.

[0014] Furthermore, the battery stack press-fitting device includes: a frame, the frame having a press-fitting cavity, the press-fitting cavity is used to place the battery cell; a press-fitting mechanism, the press-fitting mechanism is the above-mentioned press-fitting mechanism, the press-fitting mechanism is movably arranged in the press-fitting cavity; a second driving unit, the second driving unit is arranged on the frame and is connected to the pressing plate of the press-fitting mechanism to drive the pressing plate to move relative to the battery cell.

[0015] By applying the technical solution of the utility model, during the press-fitting process of the fuel cell stack, the pressing plate can drive the end plate to move in the direction of the battery unit, and apply pressure to the end plate and the battery unit to complete the press-fitting of the fuel cell stack. In both the loading stage before the press-fitting of the stack and the press-fitting stage, the positioning structure can be used to limit the horizontal displacement of the end plate relative to the pressing plate, thereby ensuring the placement consistency of the end plate, so that the fuel cell stack is uniformly stressed in the height direction during the press-fitting process, preventing the battery unit from lateral slippage, thereby ensuring the coordination effect of the internal flow path of the battery unit and the seal, improving the yield rate, and ensuring the sealing performance and working performance of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The schematic diagram of the structure of the press-fitting mechanism provided by the utility model is shown;

[0018] Figure 2A top view of the end plate provided by the utility model is shown;

[0019] Figure 3 Shows Figure 2 Sectional view along AA direction;

[0020] Figure 4 The schematic diagram of the structure of the battery stack pressing device provided by the utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 100, end plate; 101, positioning hole;

[0023] 200. Battery unit;

[0024] 300, frame; 301, press-fitting chamber;

[0025] 10. Pressing plate; 11. Positioning pin;

[0026] 20. Clamping plate; 21. Protruding portion; 22. Guide rod;

[0027] 30. Cylinder; 31. Telescopic rod;

[0028] 40. Hydraulic cylinder; DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] like Figures 1 to 4 As shown, an embodiment of the utility model provides a press-fitting mechanism for press-fitting an end plate 100 and a battery cell 200, the press-fitting mechanism includes a press plate 10, the press plate 10 can drive the end plate 100 to move toward the battery cell 200, the press plate 10 is used to abut against the end plate 100, and a positioning structure is provided on the side of the press plate 10 facing the end plate 100 to limit the horizontal displacement of the end plate 100 relative to the press plate 10.

[0031] By applying the technical solution of the utility model, during the press-fitting process of the fuel cell stack, the press plate 10 can drive the end plate 100 to move in the direction of the battery cell 200, and apply pressure to the end plate 100 and the battery cell 200 to complete the press-fitting of the fuel cell stack. In both the loading stage before the press-fitting of the stack and the press-fitting stage, the positioning structure can be used to limit the horizontal displacement of the end plate 100 relative to the press plate 10, thereby ensuring the placement consistency of the end plate 100, so that the fuel cell stack is uniformly stressed in the height direction during the press-fitting process, preventing the battery cell 200 from lateral slippage, thereby ensuring the coordination effect of the internal flow path of the battery cell and the seal, improving the yield rate, and ensuring the sealing performance and working performance of the fuel cell.

[0032] Specifically in the present application, the positioning structure includes a positioning pin 11, which is arranged on the pressure plate 10, and a positioning hole 101 is arranged on the end plate 100, and the positioning hole 101 is arranged corresponding to the positioning pin 11, and the positioning hole 101 is used to accommodate the positioning pin 11. Through the above arrangement, the positioning hole 101 cooperates with the positioning pin 11 to prevent the end plate 100 from being displaced relative to the pressure plate 10 in the horizontal direction, so as to play a role in positioning the end plate 100.

[0033] Specifically, a plurality of positioning pins 11 and positioning holes 101 are provided, and the plurality of positioning pins 11 are provided in a one-to-one correspondence with the plurality of positioning holes 101. Through the above arrangement, the plurality of positioning holes 101 cooperate with the plurality of positioning pins 11, and can limit the displacement of the end plate 100 and the pressing plate 10 in the horizontal direction while limiting the relative rotation of the end plate 100 and the pressing plate 10 in the horizontal direction, further ensuring the installation consistency of the end plate 100 relative to the battery unit 200, and further ensuring the assembly effect of the fuel cell.

[0034] Specifically in the present application, a plurality of positioning pins 11 are staggered along the extension direction of the pressing plate 10. It is worth noting that the extension direction of the pressing plate 10 may be along the width direction, the length direction or the diagonal direction, and staggering a plurality of positioning pins 11 along the extension direction of the pressing plate 10 can form a foolproof structure, so as to facilitate determining the installation direction of the pressing plate 10 and ensure that the installation position of the pressing plate 10 is accurate.

[0035] In a specific embodiment of the present application, refer to Figure 2 and Figure 3 As shown, two positioning pins 11 and two positioning holes 101 are provided to facilitate determining the installation direction of the end plate 100 .

[0036] In other feasible embodiments of the present application, the positioning pin 11 can be set on the end plate 100, and correspondingly, the positioning hole 101 is set on the pressure plate 10, as long as the positioning can be achieved by the cooperation between the positioning pin 11 and the end plate 100.

[0037] Specifically, the battery stack press-assembly device further includes a clamping assembly, which includes a clamping plate 20. Two clamping plates 20 are provided. The two clamping plates 20 are relatively arranged at the two ends of the pressing plate 10. The clamping plates 20 can move relative to the pressing plate 10. The two clamping plates 20 are used to clamp and release the end plate 100. Through the above arrangement, the two relatively arranged clamping plates 20 can be relatively close to clamp the end plate 100, or relatively far away to release the end plate 100, so that the end plate 100 is separated from the clamping assembly. In this way, the automation degree of the battery stack press-assembly device can be improved through the clamping assembly. The end plate 100 is clamped in advance by the clamping assembly, and can be directly pressed after the battery cells 200 are stacked. There is no need to stop the machine to manually place the end plate 100, thereby improving production efficiency and ensuring production quality. Specifically, before the clamping plate 20 clamps the end plate 100, it is necessary to first position the clamping plate 20 and the end plate 100, plug and match the positioning pin 11 with the positioning hole 101, and then clamp the end plate 100 by the clamping plate 20. After the battery stack pressing work is completed, the two clamping plates 20 can be driven away from each other to release the end plate 100. When the pressing plate 10 moves in a direction away from the battery cell 200, the positioning pin 11 and the positioning hole 101 move away from each other to release the positioning of the clamping plate 20 and the end plate 100.

[0038] It is worth noting that the two clamps 20 relatively arranged at the two ends of the pressing plate 10 can be the two ends relatively arranged along the width direction or along the length direction of the pressing plate 10. Preferably, they can be arranged at the ends relatively arranged along the length direction of the pressing plate 10 to improve the clamping stability of the clamping assembly.

[0039] Furthermore, a limiting structure is provided between the clamping assembly and the pressing plate 10 to limit the displacement of the end plate 100 in the height direction relative to the pressing plate 10. Through the above arrangement, after the clamping assembly clamps the end plate 100, the limiting structure can further ensure the clamping effect of the clamping assembly to prevent the end plate 100 from falling, thereby ensuring the production safety of the press-fitting process.

[0040] In a specific embodiment of the present application, refer to Figure 1 and Figure 4 As shown, the end of the clamping plate 20 close to the end plate 100 has a protrusion 21, and the protrusions 21 of the two clamping plates 20 are arranged facing each other, and the protrusions 21 abut against the end surface of the end plate 100 facing the battery cell 200 to limit the displacement of the end plate 100 in the height direction. Through the above arrangement, the protrusion 21 can form a limiting structure, supporting the end plate 100 in the height direction to limit the end plate 100, and the structure is simple, and the limiting can be achieved without adding an action structure to the press-fitting mechanism, which is convenient for simplifying the equipment.

[0041] Specifically, the protrusion 21 may be a cylindrical protrusion or a plate-shaped protrusion, so that the clamping plate 20 forms an L-shaped structure, thereby improving the clamping effect of the clamping assembly.

[0042] Furthermore, the clamping assembly further includes a first driving unit, which has a telescopic end, and the telescopic end is drivingly connected to an end of the clamping plate 20 away from the end plate 100, and the first driving unit is used to drive the clamping plate 20 to move in the horizontal direction relative to the pressing plate 10. In this way, the pressing plate 10 can be clamped by controlling the movement of the telescopic end in the horizontal direction through the first driving unit, thereby improving the automation degree of the battery stack pressing device.

[0043] In some feasible embodiments of the present application, the first driving unit can be configured as a driving motor having a driving rod, and one end of the driving rod connected to the splint 20 forms a telescopic end. The driving motor provides driving force to the splint 20 to facilitate controlling the stroke of the splint 20.

[0044] In another embodiment of the present application, the first driving part includes a cylinder 30 and a telescopic rod 31. The cylinder 30 is arranged on the pressure plate 10, the telescopic rod 31 is connected to the cylinder 30 by driving, and extends in the horizontal direction. The end of the telescopic rod 31 away from the cylinder 30 forms a telescopic end, and the telescopic rod 31 can drive the clamping plate 20 to move in the horizontal direction under the drive of the cylinder 30. Through the above arrangement, the cylinder 30 can drive the telescopic rod 31 to move relative to the end plate 100 with the telescopic rod 31 to clamp and release the end plate 100. By setting the first driving part as the cylinder 30, the response speed of the first driving part can be improved, and the clamping force of the clamping plate 20 can be improved, thereby improving the clamping effect of the clamping assembly.

[0045] In the present application, the clamping plate 20 has a guide hole, and the clamping assembly further includes a guide rod 22, which is arranged on the side wall of the pressure plate 10 and penetrates the guide hole. Through the above arrangement, when the first driving part drives the clamping plate 20 to move, the guide hole can cooperate with the guide rod 22 to guide the movement of the clamping plate 20, so as to ensure the stability of the movement of the clamping plate 20.

[0046] Furthermore, the guide hole is arranged in the middle of the clamping plate 20, so as to improve the stability of the clamping plate 20 during movement and prevent the clamping plate 20 from deflecting in the height direction.

[0047] For ease of understanding, the process of the press-fitting mechanism and the clamping assembly provided in the present application cooperating to clamp and release the end plate 100 is as follows:

[0048] The first driving unit drives the two clamps 20 to move relatively apart, and in the vertical direction, moves the end plate 100 close to the pressure plate 10, and makes the positioning pin 11 enter the positioning hole 101. At this time, the first driving unit is driven to make the two clamps 20 relatively close, so that the side walls of the clamps 20 abut against the side walls of the end plates 100, and the end faces of the end plates 100 abut against the protrusions 21 to prevent the end plates 100 from falling off. After completing the press-fitting work on the fuel cell, the first driving unit drives the two clamps 20 to move relatively apart to release the end plates 100.

[0049] According to an embodiment of the present utility model, a battery stack pressing device is also provided, such as Figure 4 As shown, the battery stack press-fitting device includes a frame 300, a press-fitting mechanism and a second driving unit. The frame 300 has a press-fitting cavity 301, which is used to place the battery cell 200. The press-fitting mechanism is the above-mentioned press-fitting mechanism, which is movably arranged in the press-fitting cavity 301. The second driving unit is arranged on the frame 300 and is drivingly connected to the pressing plate 10 of the pressing mechanism to drive the pressing plate 10 to move relative to the battery cell 200.

[0050] Specifically in the present application, a positioning structure can also be set between the bottom pressing platform of the pressing chamber and the end plate 100 at the bottom of the fuel cell stack to further ensure the accurate placement of the fuel cell stack during the loading stage of the pressing process, so as to ensure that the fuel cell stack can be positioned relative to the pressing mechanism. By positioning the fuel cell stack and the pressing mechanism, and positioning the pressing mechanism and the end plate 100, the pressing effect of the fuel cell is ensured.

[0051] In a feasible embodiment of the present application, the second driving unit includes a hydraulic cylinder 40, which is drivingly connected to the pressing plate 10 to provide driving force to the pressing plate 10 to ensure the pressure of the press fitting. In other feasible embodiments of the present application, the second driving unit can also be set as a servo motor, as long as it can provide driving force for the pressing plate 10 to achieve press fitting.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0054] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0055] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0056] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0057] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A press-fitting mechanism, characterized in that: The press-fitting mechanism is used to press-fit the end plate (100) and the battery unit (200), and the press-fitting mechanism comprises: A pressure plate (10), wherein the pressure plate (10) is capable of driving the end plate (100) to move toward the battery cell (200), the pressure plate (10) is used to abut against the end plate (100), and a positioning structure is provided on the side of the pressure plate (10) facing the end plate (100) to limit the displacement of the end plate (100) in the horizontal direction relative to the pressure plate (10).

2. The press-fitting mechanism according to claim 1, characterized in that: The positioning structure comprises a positioning pin (11), wherein the positioning pin (11) is arranged on the pressure plate (10), and a positioning hole (101) is arranged on the end plate (100), wherein the positioning hole (101) is arranged corresponding to the positioning pin (11), and the positioning hole (101) is used to accommodate the positioning pin (11).

3. The press-fitting mechanism according to claim 2, characterized in that: A plurality of the positioning pins (11) and the positioning holes (101) are provided, and the plurality of positioning pins (11) and the plurality of positioning holes (101) are provided in a one-to-one correspondence.

4. The press-fitting mechanism according to claim 3, characterized in that: Along the extension direction of the pressing plate (10), a plurality of positioning pins (11) are staggeredly arranged.

5. The press-fitting mechanism according to claim 1, characterized in that: The press-fitting mechanism also includes: A clamping assembly, the clamping assembly comprises a clamping plate (20), two clamping plates (20) are provided, the two clamping plates (20) are arranged opposite to each other at the two ends of the pressure plate (10), the clamping plates (20) can move relative to the pressure plate (10), and the two clamping plates (20) are used to clamp and release the end plate (100).

6. The press-fitting mechanism according to claim 5, characterized in that: One end of the clamping plate (20) close to the end plate (100) has a protrusion (21), and the protrusions (21) of the two clamping plates (20) are arranged facing each other. The protrusions (21) abut against the end surface of the end plate (100) facing the battery unit (200) to limit the displacement of the end plate (100) in the height direction.

7. The press-fitting mechanism according to claim 5, characterized in that: The clamping assembly also includes: A first driving unit, wherein the first driving unit has a telescopic end, the telescopic end is drivingly connected to an end of the clamping plate (20) away from the end plate (100), and the first driving unit is used to drive the clamping plate (20) to move in a horizontal direction relative to the pressing plate (10).

8. The press-fitting mechanism according to claim 7, characterized in that: The first driving unit comprises: A cylinder (30), wherein the cylinder (30) is arranged on the pressing plate (10); A telescopic rod (31), the telescopic rod (31) is drivingly connected to the cylinder (30) and extends in a horizontal direction, one end of the telescopic rod (31) away from the cylinder (30) forms the telescopic end, and the telescopic rod (31) can drive the clamping plate (20) to move in a horizontal direction under the drive of the cylinder (30).

9. The press-fitting mechanism according to claim 5, characterized in that: The clamping plate (20) has a guide hole, and the clamping assembly further comprises: A guide rod (22), wherein the guide rod (22) is arranged on the side wall of the pressing plate (10), and the guide rod (22) is inserted into the guide hole.

10. A battery stack press assembly device, characterized in that: The stack press-assembly device comprises: A frame (300), the frame (300) having a press-fitting cavity (301), the press-fitting cavity (301) being used to place a battery unit (200); A press-fitting mechanism, wherein the press-fitting mechanism is the press-fitting mechanism according to any one of claims 1 to 9, and the press-fitting mechanism is movably arranged in the press-fitting cavity (301); A second driving unit, the second driving unit is arranged on the frame (300) and is drivingly connected to the pressing plate (10) of the pressing mechanism to drive the pressing plate (10) to move relative to the battery unit (200).

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