Bipolar plate cutting device and cutting method

Abstract

The invention relates to a bipolar plate cutting device and method, and the bipolar plate cutting device comprises a driving mechanism, an upper fixing plate, a lower fixing plate, an upper floating plate, a lower floating plate, a first limiting column, a first elastic part, a second limiting column, a second elastic part, a guide column, a guide sleeve, an upper cutter and a lower cutter. According to the embodiment of the invention, when the to-be-cut mother board is cut, the two opposite sides of the bipolar plate are subjected to mold pressing and cutting at the same time, so that the situation that cracks are generated due to internal stress after the bipolar plate is slit and the yield is influenced can be avoided, and meanwhile, automation of mold pressing and cutting of the bipolar plate can be realized. Besides, the upper floating plate and the lower floating plate are respectively provided with a first avoiding groove and a second avoiding groove, so that the mold pressing and the cutting of the bipolar plate can be simultaneously carried out, a plurality of bipolar plates can be continuously cut, and the production efficiency of the bipolar plates is improved.

Description

[0001] This application is a divisional application of the original patent application filed on March 7, 2023, with original application number 202310218563.7 and invention title "A bipolar plate cutting device and cutting method". Technical Field

[0002] This invention relates to a bipolar plate cutting device and a cutting method. Background Technology

[0003] Currently, the fabrication process of graphite bipolar plates for fuel cells requires multiple steps to ultimately produce the finished bipolar plate. Currently, graphite bipolar plates are typically produced by molding followed by slitting. This production method, because the molding process also requires slitting, leveling, screen printing, and curing, results in low production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a bipolar plate cutting device and method that integrates molding and cutting.

[0005] To achieve the above objectives, the present invention provides a bipolar plate cutting device, comprising: a driving mechanism, an upper fixed plate, a lower fixed plate, an upper floating plate, a lower floating plate, a first limiting post, a first elastic element, a second limiting post, a second elastic element, a guide post, a guide sleeve, an upper cutter, and a lower cutter; the guide sleeve has a sliding channel extending in a straight direction, the guide sleeve is disposed on the lower fixed plate, the guide post is disposed on the upper fixed plate, and the guide post slides within the sliding channel; a gap for accommodating bipolar plates is provided between the upper floating plate and the lower floating plate; the upper cutter is fixedly connected to the upper fixed plate; the lower cutter is fixedly connected to the lower fixed plate; a first clearance groove is formed on the upper floating plate, allowing the upper cutter to pass through and extend into the gap; a second clearance groove is formed on the lower floating plate, allowing the lower cutter to pass through and extend into the gap;

[0006] The upper floating plate is provided with a first sliding hole; the first end of the first limiting post is fixedly connected to the upper fixed plate, and the second end of the first limiting post passes through the first sliding hole; one end of the first elastic member abuts against the upper fixed plate, and the other end of the first elastic member abuts against the upper floating plate; the first elastic member is used to reset the upper floating plate to the initial position.

[0007] A second sliding hole is provided on the lower floating plate; the first end of the second limiting post is fixedly connected to the lower fixed plate, and the second end of the second limiting post passes through the second sliding hole; one end of the second elastic member abuts against the lower fixed plate, and the other end of the second elastic member abuts against the lower floating plate; the second elastic member is used to reset the lower floating plate to the initial position;

[0008] The driving mechanism is used to drive the upper fixed plate and the lower fixed plate to move towards each other so that the upper floating plate and the lower floating plate can mold the bipolar sheet, or to drive the upper fixed plate and the lower fixed plate to move away from each other so that the upper floating plate and the lower floating plate can detach from the bipolar sheet.

[0009] Optionally, it further includes: a first limiting block connected to the second end of the first limiting post; the first sliding hole includes: a first channel and a second channel; the first channel and the second channel are connected and coaxially arranged; the second channel, the first channel and the upper fixing plate are arranged in sequence; the diameter of the second channel is greater than the diameter of the first channel; the first limiting block is slidably disposed in the second channel.

[0010] Optionally, it further includes: a second limiting block connected to the second end of the second limiting post; the second sliding hole includes: a third channel and a fourth channel; the third channel and the fourth channel are connected and coaxially arranged; the fourth channel, the third channel and the lower fixing plate are arranged in sequence; the diameter of the fourth channel is larger than the diameter of the third channel; the second limiting block is slidably disposed in the fourth channel.

[0011] Optionally, the driving mechanism includes: a first hydraulic cylinder and a second hydraulic cylinder; the output shaft of the first hydraulic cylinder is connected to the upper fixed plate; the output shaft of the second hydraulic cylinder is connected to the lower fixed plate;

[0012] Wherein, the first hydraulic cylinder is used to push the upper fixed plate to move along the first direction to the cutting position, and the second hydraulic cylinder is used to push the lower fixed plate to move along the second direction to the cutting position; the first direction is opposite to the second direction; when in the cutting position, the upper floating plate and the floating plate clamp the bipolar plate located in the gap, the upper cutter passes through the first clearance groove and extends into the gap to cut the bipolar plate, and the lower cutter passes through the second clearance groove and extends into the gap to cut the bipolar plate.

[0013] A bipolar plate cutting method, applied to the bipolar plate cutting apparatus as described in any of the preceding claims, comprising:

[0014] Place the bipolar plate within the gap and support it on the lower floating plate;

[0015] The drive mechanism is activated to drive the upper fixed plate and the lower fixed plate to move toward each other until the upper floating plate and the lower floating plate mold the bipolar plate.

[0016] The drive mechanism is restarted to drive the upper fixed plate and the lower fixed plate to move towards each other until the upper floating plate and the lower floating plate are in the cutting position. The upper cutter passes through the first clearance groove and the lower cutter passes through the second clearance groove to enter the gap to cut the bipolar plate.

[0017] After cutting is completed, the drive mechanism is activated to drive the upper fixed plate and the lower fixed plate to move in opposite directions. The upper floating plate and the lower floating plate switch from the cutting position to the initial position under the action of the first elastic element and the second elastic element, respectively. The upper cutter exits the first clearance groove and the lower cutter exits the second clearance groove.

[0018] Restart the drive mechanism to drive the upper fixed plate and the lower fixed plate to move in opposite directions until the upper floating plate disengages from the bipolar plate.

[0019] Optionally, the bipolar plate is placed within the gap and supported on the lower floating plate, including:

[0020] At least one positioning block is provided on the lower floating plate, and at least one positioning hole is provided on the bipolar plate. The bipolar plate is placed on the lower floating plate and the positioning hole is inserted into the positioning block.

[0021] Optionally, the upper cutter passes through the first clearance groove and the lower cutter passes through the second clearance groove to enter the gap to cut the bipolar plate, specifically including:

[0022] The first clearance groove and the second clearance groove are located on the same plane. The upper cutter passes through the first clearance groove and the lower cutter passes through the second clearance groove to enter the gap to cut the bipolar plate.

[0023] Compared with the prior art, the bipolar plate cutting device and cutting method of this invention have the following advantages:

[0024] In this embodiment of the invention, when cutting the master plate to be cut, the bipolar sheet is simultaneously molded and cut on opposite sides, which avoids cracks caused by internal stress after the bipolar sheet is cut, thus preventing a decrease in yield. Simultaneously, it automates the molding and cutting of the bipolar sheet. Furthermore, by providing a first clearance groove and a second clearance groove on the upper and lower floating plates respectively, this application enables simultaneous molding and cutting of the bipolar sheet, allowing for continuous cutting of multiple bipolar sheets and improving bipolar sheet production efficiency. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of an embodiment of the present invention (the upper and lower floating plates are in their initial positions);

[0026] Figure 2 yes Figure 1 Enlarged diagram of A in the middle;

[0027] Figure 3 yes Figure 1Enlarged diagram of B in the diagram;

[0028] Figure 4 This is a side view of an embodiment of the present invention (the upper and lower floating plates are in their initial positions);

[0029] Figure 5 yes Figure 4 Enlarged diagram of C in the middle;

[0030] Figure 6 This is a side view of an embodiment of the present invention (the upper and lower floating plates are in the cutting position);

[0031] Figure 7 This is a flowchart illustrating the cutting method in an embodiment of the present invention.

[0032] In the diagram, 1. Upper fixed plate; 2. Lower fixed plate; 31. First limiting post; 32. First elastic element; 41. Second limiting post; 42. Second elastic element; 5. Upper floating plate; 51. First clearance groove; 52. First sliding hole; 521. First channel; 522. Second channel; 6. Lower floating plate; 61. Second clearance groove; 62. Second sliding hole; 621. Third channel; 622. Fourth channel; 7. Upper cutter; 8. Lower cutter; 9. First limiting block; 10. Second limiting block; 11. Bipolar plate; 12. Guide post; 13. Guide sleeve. Detailed Implementation

[0033] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0034] First, it should be noted that the directions such as top, bottom, upward, and downward mentioned in this article are defined relative to the directions in the various accompanying figures. They are relative concepts and therefore can change depending on their different positions and practical applications. Therefore, these or other directions should not be interpreted as restrictive terms.

[0035] It should be noted that the term "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude the plural.

[0036] Furthermore, it should be noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the accompanying drawings, can still be combined among these technical features (or their equivalents) to obtain other embodiments of this application not directly mentioned herein.

[0037] It should also be understood that while the terms "first," "second," etc., are used in this document to describe various types of information, this information should not be limited to these terms, which are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0038] It should be noted that in different figures, the same reference numerals denote the same or substantially the same components.

[0039] like Figure 1 , Figure 4 , Figure 5 as well as Figure 6 As shown, a preferred embodiment of the present invention provides a bipolar plate 11 cutting device, comprising: a driving mechanism, an upper fixed plate 1, a lower fixed plate 2, an upper floating plate 5, a lower floating plate 6, a first limiting post 31, a first elastic element 32, a second limiting post 41, a second elastic element 42, a guide post 12, a guide sleeve 13, an upper cutter 7, and a lower cutter 8. The guide sleeve 13 has a sliding channel extending in a straight direction. The guide sleeve 13 is disposed on the lower fixed plate 2, and the guide post 12 is disposed on the upper fixed plate 1. The guide post 12 slides within the sliding channel, and the arrangement of the guide post 12 and the guide sleeve 13 allows the upper fixed plate 1 and the lower fixed plate 2 to move relative to each other in a straight direction. A gap exists between the upper floating plate 5 and the lower floating plate 6 for accommodating the bipolar plate 11. The upper cutter 7 is fixedly connected to the upper fixed plate 1. The lower cutter 8 is fixedly connected to the lower fixed plate 2. The upper floating plate 5 has a first clearance groove 51 through which the upper cutter 7 can pass and extend into the gap. The upper floating plate 5 slides toward the upper fixed plate 1 to allow the upper cutter 7 to pass through the first clearance groove 51 and enter the gap. The lower floating plate 6 has a second clearance groove 61 through which the lower cutter 8 can pass and extend into the gap. The lower floating plate 6 slides toward the lower fixed plate 2 to allow the lower cutter 8 to pass through the second clearance groove 61 and enter the gap.

[0040] See Figure 1 and Figure 2 The upper floating plate 5 has a first sliding hole 52. The first end of the first limiting post 31 is fixedly connected to the upper fixed plate 1, and the second end of the first limiting post 31 passes through the first sliding hole 52, allowing the upper floating plate 5 to slide along the first guide post 12. One end of the first elastic member 32 abuts against the upper fixed plate 1, and the other end of the first elastic member 32 abuts against the upper floating plate 5. The first elastic member 32 is used to reset the upper floating plate 5 to its initial position.

[0041] See Figure 1 and Figure 3 The lower floating plate 6 has a second sliding hole 62. The first end of the second limiting post 41 is fixedly connected to the lower fixed plate 2, and the second end of the second limiting post 41 passes through the second sliding hole 62, allowing the lower floating plate 6 to slide along the second guide post 12. One end of the second elastic member 42 abuts against the lower fixed plate 2, and the other end of the second elastic member 42 abuts against the lower floating plate 6; the second elastic member 42 is used to reset the lower floating plate 6 to its initial position.

[0042] The driving mechanism is used to drive the upper fixed plate 1 and the lower fixed plate 2 to move towards each other so that the upper floating plate 5 and the lower floating plate 6 can mold the bipolar sheet, or to drive the upper fixed plate 1 and the lower fixed plate 2 to move away from each other so that the upper floating plate 5 and the lower floating plate 6 can detach from the bipolar sheet.

[0043] Based on the above structure, in this embodiment of the invention, the bipolar sheet to be cut is first placed in the gap, and then the upper fixed plate 1 and the lower fixed plate 2 are driven to move towards each other by the driving mechanism, so that the upper floating plate 5 and the lower floating plate 6 move towards each other until the upper floating plate 5 and the lower floating plate 6 respectively abut against the opposite sides of the bipolar sheet 11 to mold the bipolar sheet 11. The driving mechanism continues to drive the upper fixed plate 1 and the lower fixed plate 2 to move towards each other until the upper cutter 7 passes through and extends to the first clearance groove 51 of the gap, and the lower cutter 8 passes through and extends to the second clearance groove 61 of the gap, so that the upper floating plate 5 and the lower floating plate 6 are in the cutting position, so that the upper cutter 7 and the lower cutter 8 cut the bipolar sheet together. By cutting the opposite sides of the bipolar sheet at the same time, this application can avoid cracks caused by internal stress after the bipolar sheet 11 is cut, which affects the yield. At the same time, it can realize the automation of bipolar sheet molding and cutting. Furthermore, by setting a first clearance groove 51 and a second clearance groove 61 on the upper floating plate 5 and the lower floating plate 6 respectively, this application enables simultaneous molding and cutting of bipolar plates, allowing for continuous cutting of multiple bipolar plates 11 and improving the production efficiency of bipolar plates 11. After the bipolar plates 11 are cut, the drive mechanism is activated to drive the upper fixed plate 1 and the lower fixed plate 2 to move in opposite directions. Under the action of the first elastic element 32 and the second elastic element 42 respectively, the upper floating plate 5 and the lower floating plate 6 switch from the cutting position to the initial position. The upper cutter 7 exits the first clearance groove 51 and the lower cutter 8 exits the second clearance groove 61. The drive mechanism is activated again to drive the upper fixed plate 1 and the lower fixed plate 2 to move in opposite directions until the upper floating plate 5 disengages from the bipolar plate 11. The upper floating plate 5 and the lower floating plate 6 are automatically reset by the first elastic element 32 and the second elastic element 42, enabling the bipolar plate 11 cutting device of this application to work cyclically.

[0044] When the upper floating plate 5 is in the cutting position, the first elastic member 32 is in a compressed state. The driving mechanism drives the upper fixed plate 1 and the lower fixed plate 2 to move in opposite directions, so that the upper floating plate 5 and the lower floating plate 6 are separated. The first elastic member 32 uses the restoring force to switch the upper floating plate 5 from the cutting position to the initial position, so that the cutting end of the upper cutter 7 can retract from the first clearance groove 51 to between the upper fixed plate 1 and the upper floating plate 5, so that the bipolar sheet can be placed into the gap again for the next cutting.

[0045] When the lower floating plate 6 is in the cutting position, the second elastic member 42 is in a compressed state. The driving mechanism drives the upper fixed plate 1 and the lower fixed plate 2 to move in opposite directions, so that the upper floating plate 5 and the lower floating plate 6 are separated. The second elastic member 42 uses the restoring force to switch the lower floating plate 6 from the cutting position to the initial position, so that the cutting end of the lower cutter 8 can retract from the second clearance groove 61 to between the lower fixed plate 2 and the lower floating plate 6, so that the bipolar sheet can be placed into the gap again for the next cutting.

[0046] Specifically, the first elastic element 32 and the second elastic element 42 are both springs, and are respectively sleeved on the first limiting post 31 and the second limiting post 41. The springs are always in a compressed state, so that when the upper floating plate 5 and the lower floating plate 6 are in the initial position, the upper floating plate 5 and the upper fixed plate 1 are pushed to the position with the greatest relative distance by the restoring force of the spring, and the lower floating plate 6 and the lower fixed plate 2 are pushed to the position with the greatest relative distance by the restoring force of the spring.

[0047] Further, see Figure 1 The upper fixed plate 1 and the lower fixed plate 2 are arranged parallel to each other, so that the upper fixed plate 1 and the lower fixed plate 2 can move in parallel towards each other. The upper floating plate 5 and the lower floating plate 6 are arranged parallel to each other, so that when the upper floating plate 5 and the lower floating plate 6 move towards each other, they can fit against the opposite sides of the bipolar plate.

[0048] Further, see Figure 1 and Figure 2The embodiment of the present invention further includes: a first limiting block 9. The first limiting block 9 is connected to the second end of the first limiting post 31, and the first limiting block 9 is cylindrical. The first sliding hole 52 includes: a first channel 521 and a second channel 522. The first channel 521 and the second channel 522 are connected and coaxially arranged. The second channel 522, the first channel 521, and the upper fixing plate 1 are arranged sequentially. The diameter of the second channel 522 is larger than the diameter of the first channel 521, and the diameter of the first channel 521 matches the diameter of the first limiting post 31. The first limiting block 9 slides in the second channel 522, and the diameter of the first limiting block 9 is larger than the diameter of the first channel 521. That is, the first limiting block 9 limits the upper floating plate 5, so that the upper floating plate 5 will not detach from the upper fixing plate 1 even under the restoring force of the first elastic member 32, thereby ensuring the stability and reusability of the entire cutting device.

[0049] Further, see Figure 1 and Figure 3 The embodiment of the present invention further includes a second limiting block 10. The second limiting block 10 is connected to the second end of the second limiting post 41, and the second limiting block 10 is cylindrical. The first sliding hole 52 includes a third channel 621 and a fourth channel 622. The third channel 621 and the fourth channel 622 are connected and coaxially arranged. The fourth channel 622, the third channel 621, and the lower fixing plate 2 are arranged sequentially. The diameter of the fourth channel 622 is larger than the diameter of the third channel 621, and the diameter of the third channel 621 matches the diameter of the second limiting post 41. The second limiting block 10 slides within the fourth channel 622, and the diameter of the second limiting block 10 is larger than the diameter of the third channel 621. That is, the second limiting block 10 limits the lower floating plate 6, so that the lower floating plate 6 will not detach from the lower fixing plate 2 even under the restoring force of the second elastic member 42, thereby ensuring the stability and reusability of the entire cutting device.

[0050] Further, see Figure 5 The upper cutter 7 has a tapered cross-section at its end. The first clearance groove 51 also has a tapered cross-section. The larger diameter end of the first clearance groove 51 faces the upper fixing plate 1. The tapered cross-section of the first clearance groove 51 prevents the end of the upper cutter 7 from passing too far through the gap, thus preventing damage to the bipolar plate 11 within the gap. In other words, the length by which the end of the upper cutter 7 passes through the first clearance groove 51 can be changed according to actual usage by altering the taper and width of the first clearance groove 51.

[0051] Further, see Figure 5The lower cutter 8 has a tapered cross-section at its end. The second clearance groove 61 also has a tapered cross-section. The larger diameter end of the second clearance groove 61 faces the lower fixing plate 2. The tapered cross-section of the second clearance groove 61 prevents the cutting end of the lower cutter 8 from passing too far through the gap, thus preventing damage to the bipolar plate 11 within the gap. In other words, the length by which the end of the lower cutter 8 passes through the second clearance groove 61 can be changed according to actual usage by altering the taper and width of the second clearance groove 61.

[0052] In one possible embodiment of the drive mechanism, the drive mechanism includes: a first hydraulic cylinder and a second hydraulic cylinder. The first direction is opposite to the second direction, the output shaft of the first hydraulic cylinder is connected to the upper fixed plate 1, and the output shaft of the second hydraulic cylinder is connected to the lower fixed plate 2.

[0053] Wherein, the first hydraulic cylinder is used to push the upper fixed plate 1 to move along the first direction to the cutting position, and the second hydraulic cylinder is used to push the lower fixed plate 2 to move along the second direction to the cutting position; when in the cutting position, the upper floating plate 5 and the floating plate clamp the bipolar plate 11 located in the gap, the upper cutter 7 passes through the first clearance groove 51 and extends into the gap to cut the bipolar plate 11, and the lower cutter 8 passes through the second clearance groove 61 and extends into the gap to cut the bipolar plate 11.

[0054] It is understandable that the drive mechanism can also be in other forms, such as using a press or cutting equipment, which only requires the upper fixed plate 1 and the lower fixed plate 2 to move towards or away from each other.

[0055] This invention also provides a bipolar plate 11 cutting method, applied to the bipolar plate cutting device described above, see [link to documentation]. Figure 7 It includes:

[0056] S1. Place the bipolar plate 11 in the gap and support it on the lower floating plate 6.

[0057] Specifically, at least one positioning block is provided on the lower floating plate 6, and at least one positioning hole is provided on the bipolar plate. The bipolar plate is placed on the lower floating plate 6 and the positioning hole is inserted into the positioning block.

[0058] S2. Start the drive mechanism to drive the upper fixed plate 1 and the lower fixed plate 2 to move towards each other until the upper floating plate 5 and the lower floating plate 6 mold the bipolar plate 11.

[0059] S3. Restart the drive mechanism to drive the upper fixed plate 1 and the lower fixed plate 2 to move towards each other until the upper floating plate 5 and the lower floating plate 6 are in the cutting position. The upper cutter 7 passes through the first clearance groove 51 and the lower cutter 8 passes through the second clearance groove 61 and enters the gap to cut the bipolar plate 11.

[0060] Specifically, the first clearance groove 51 and the second clearance groove 61 are located on the same plane. The upper cutter 7 passes through the first clearance groove 51 and the lower cutter 8 passes through the second clearance groove 61 to enter the gap to cut the bipolar plate 11.

[0061] S4. After cutting is completed, the drive mechanism is started to drive the upper fixed plate 1 and the lower fixed plate 2 to move in opposite directions. The upper floating plate 5 and the lower floating plate 6 switch from the cutting position to the initial position under the action of the first elastic element 32 and the second elastic element 42 respectively. The upper cutter 7 exits the first clearance groove 51 and the lower cutter 8 exits the second clearance groove 61.

[0062] S5. Restart the drive mechanism to drive the upper fixed plate 1 and the lower fixed plate 2 to move in opposite directions until the upper floating plate 5 disengages from the bipolar plate 11.

[0063] When the cutting method provided in this embodiment is used to cut the master plate to be cut, it can avoid cracks caused by internal stress after the bipolar plate 11 is cut by simultaneously molding and cutting the opposite sides of the bipolar plate, thus avoiding affecting the yield. At the same time, it can realize the automation of bipolar plate molding and cutting. In addition, by setting the first clearance groove 51 and the second clearance groove 61 on the upper floating plate 5 and the lower floating plate 6 respectively, this application can realize the simultaneous molding and cutting of bipolar plates, and can continuously cut multiple bipolar plates 11, thereby improving the production efficiency of bipolar plate 11.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A bipolar plate cutting device, characterized in that, include: The system comprises a drive mechanism, an upper fixed plate, a lower fixed plate, an upper floating plate, a lower floating plate, a first limiting post, a first elastic element, a second limiting post, a second elastic element, a guide post, a guide sleeve, an upper cutter, and a lower cutter. The guide sleeve has a sliding channel extending in a straight direction. The guide sleeve is disposed on the lower fixed plate, and the guide post is disposed on the upper fixed plate, sliding within the sliding channel. A gap for accommodating a bipolar plate is provided between the upper and lower floating plates. The upper cutter is fixedly connected to the upper fixed plate. The lower cutter is fixedly connected to the lower fixed plate. A first clearance groove is formed on the upper floating plate, allowing the upper cutter to pass through and extend into the gap. A second clearance groove is formed on the lower floating plate, allowing the lower cutter to pass through and extend into the gap. The upper floating plate is provided with a first sliding hole; the first end of the first limiting post is fixedly connected to the upper fixed plate, and the second end of the first limiting post passes through the first sliding hole; one end of the first elastic member abuts against the upper fixed plate, and the other end of the first elastic member abuts against the upper floating plate; the first elastic member is used to reset the upper floating plate to the initial position. A second sliding hole is provided on the lower floating plate; the first end of the second limiting post is fixedly connected to the lower fixed plate, and the second end of the second limiting post passes through the second sliding hole; one end of the second elastic member abuts against the lower fixed plate, and the other end of the second elastic member abuts against the lower floating plate; the second elastic member is used to reset the lower floating plate to the initial position; The driving mechanism is used to drive the upper fixed plate and the lower fixed plate to move towards each other so that the upper floating plate and the lower floating plate can mold the bipolar sheet, or to drive the upper fixed plate and the lower fixed plate to move away from each other so that the upper floating plate and the lower floating plate can detach from the bipolar sheet.

2. The bipolar plate cutting device according to claim 1, characterized in that, Also includes: A first limiting block connected to the second end of the first limiting post; The first sliding hole includes: a first channel and a second channel; the first channel and the second channel are connected and coaxially arranged; the second channel, the first channel and the upper fixing plate are arranged in sequence; the diameter of the second channel is larger than the diameter of the first channel; the first limiting block is slidably disposed in the second channel.

3. The bipolar plate cutting device according to claim 1, characterized in that, Also includes: The second limiting block is connected to the second end of the second limiting post; The second sliding hole includes a third channel and a fourth channel; the third channel and the fourth channel are connected and coaxially arranged; the fourth channel, the third channel and the lower fixing plate are arranged in sequence; the diameter of the fourth channel is larger than the diameter of the third channel; the second limiting block is slidably disposed in the fourth channel.

4. The bipolar plate cutting device according to claim 1, characterized in that, The driving mechanism includes: a first hydraulic cylinder and a second hydraulic cylinder; the output shaft of the first hydraulic cylinder is connected to the upper fixed plate; the output shaft of the second hydraulic cylinder is connected to the lower fixed plate. Wherein, the first hydraulic cylinder is used to push the upper fixed plate to move along the first direction to the cutting position, and the second hydraulic cylinder is used to push the lower fixed plate to move along the second direction to the cutting position; the first direction is opposite to the second direction; when in the cutting position, the upper floating plate and the floating plate clamp the bipolar plate located in the gap, the upper cutter passes through the first clearance groove and extends into the gap to cut the bipolar plate, and the lower cutter passes through the second clearance groove and extends into the gap to cut the bipolar plate.

5. A bipolar plate cutting method, applied to the bipolar plate cutting apparatus as described in any one of claims 1-4, characterized in that, include: Place the bipolar plate within the gap and support it on the lower floating plate; The drive mechanism is activated to drive the upper fixed plate and the lower fixed plate to move toward each other until the upper floating plate and the lower floating plate mold the bipolar plate. The drive mechanism is restarted to drive the upper fixed plate and the lower fixed plate to move towards each other until the upper floating plate and the lower floating plate are in the cutting position. The upper cutter passes through the first clearance groove and the lower cutter passes through the second clearance groove to enter the gap to cut the bipolar plate. After cutting is completed, the drive mechanism is activated to drive the upper fixed plate and the lower fixed plate to move in opposite directions. The upper floating plate and the lower floating plate switch from the cutting position to the initial position under the action of the first elastic element and the second elastic element, respectively. The upper cutter exits the first clearance groove and the lower cutter exits the second clearance groove. Restart the drive mechanism to drive the upper fixed plate and the lower fixed plate to move in opposite directions until the upper floating plate disengages from the bipolar plate.

6. The bipolar plate cutting method according to claim 5, characterized in that, Placing the bipolar plate within the gap and supporting it on the lower floating plate includes: At least one positioning block is provided on the lower floating plate, and at least one positioning hole is provided on the bipolar plate. The bipolar plate is placed on the lower floating plate and the positioning hole is inserted into the positioning block.

7. The bipolar plate cutting method according to claim 5, characterized in that, The upper cutter passes through the first clearance groove and the lower cutter passes through the second clearance groove to enter the gap to cut the bipolar plate, specifically including: The first clearance groove and the second clearance groove are located on the same plane. The upper cutter passes through the first clearance groove and the lower cutter passes through the second clearance groove to enter the gap to cut the bipolar plate.

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