Bipolar plate hydraulic machine and control system

Abstract

The invention discloses a bipolar plate hydraulic machine and a control system, and relates to the technical field of bipolar plate hydraulic machines, the bipolar plate hydraulic machine comprises a bipolar plate hydraulic machine body, a control module, a pressure sensor and a communication module, the bipolar plate hydraulic machine comprises a machine body shell, the machine body shell is composed of a plate frame, an oil cylinder is arranged in the machine body shell, and a connecting steel pipe is arranged at the top of the oil cylinder; the plate frame type structure is adopted, the upper cross beam, the lower cross beam and the stand column are directly connected into a whole through integral welding of the plate frame type structure, the transverse size of the stand column is large, the stand column is mostly of a box-shaped structure, and the bending resistance is good; through control and use of the energy accumulator, the servo valve, the double-active proportional flow valve and the pressurizing oil tank, the system can achieve high-precision control over an execution element, the complex and changeable process requirements are met, the system can rapidly respond to changes of control signals due to the rapid response characteristic, and the production takt is accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of bipolar plate hydraulic presses, in particular to a bipolar plate hydraulic press and a control system. Background Art

[0002] New energy vehicle batteries are gradually beginning to use hydrogen fuel cells. The working principle of hydrogen fuel cells is: hydrogen is sent to the anode plate of the fuel cell. After the action of the catalyst, one electron in the hydrogen atom is separated, and the hydrogen ion (proton) that has lost the electron passes through the proton exchange membrane and reaches the cathode plate of the battery. Electrons cannot pass through the proton exchange membrane. This electron can only reach the cathode plate of the battery through an external circuit, thereby generating current in the external circuit. After the electron reaches the cathode plate, it combines with oxygen atoms to form water. Since oxygen can be obtained from the air, oxygen is provided to the cathode plate and water is taken away in time, so that electricity can be continuously provided. The bipolar plate is a metal that uses stamping and hydraulic forming technology. Through pressure control and high-rigidity presses, 0.1mm ultra-thin metal plates are stamped into positive and negative unipolar plates, and finally the two unipolar plates are connected correspondingly through a connection process. The weight of the bipolar plate accounts for 60%-80% of the weight of the battery stack. With the continuous development of fuel cell technology, the precision requirements for bipolar plates are getting higher and higher. Therefore, the thickness of the electrode plate plays a vital role in new energy batteries.

[0003] The existing hydraulic press has low pressure control accuracy, and the control accuracy can only reach ±0.5MPa, which is difficult to meet the needs of high-precision processing. The smaller the thickness of the raw materials of the bipolar plate, the better. The current hydraulic press pressure is difficult to achieve precise control of the pressure, which will cause defects such as cracks in the bipolar plate and a high scrap rate. In addition, the current hydraulic press has low production efficiency due to the electromagnetic components and the opening of the filling valve, which require response time. Only 5 pieces are produced in one minute. Therefore, it cannot meet the high efficiency requirements of the bipolar plate.

[0004] Secondly, when the hydraulic press is working, its internal mechanical parts will perform reciprocating motion, which will generate mechanical vibrations. The mechanical vibrations will be transmitted to the steel pipe through the cylinder body and connectors of the hydraulic cylinder. Long-term vibrations will also cause the pipe joints to loosen and the seals to be damaged, which will cause hydraulic oil leakage, thereby affecting the accuracy and response speed of the equipment. Leakage problems will lead to insufficient system pressure, performance degradation, and even equipment shutdown, seriously affecting production efficiency.

[0005] Therefore, the present invention proposes a bipolar plate hydraulic press and a control system to improve the deficiencies of the conventional technology. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a bipolar plate hydraulic press and a control system, which solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A bipolar plate hydraulic control system includes a bipolar plate hydraulic press, a control module, a pressure sensor and a communication module, wherein the control module includes a motor, an oil pump, a dual active proportional flow valve, a pneumatic regulating valve, an accumulator, a servo valve, a boost tank, a safety valve, a boost valve and a communication module, wherein the boost valve is electrically connected to the oil pump through the communication module and is used to control the pressure inside the boost tank, a pressure sensor is fixedly connected to the inside of the boost tank, and the pressure sensor is electrically connected to the safety valve through the communication module and is used to control the opening and closing of the safety valve, the dual active proportional flow valve controls the speed and flow of oil entering the cylinder by connecting a steel pipe, a motor and an oil pump, the servo valve is electrically connected to the cylinder through the communication module and is used to control the rapid up and down movement of the cylinder, the pneumatic regulating valve controls the direction of the oil in the boost tank by connecting a steel pipe, a motor and an oil pump, and the control module is electrically connected to the hydraulic press.

[0008] A bipolar plate hydraulic press comprises a body shell, which is composed of a plate frame. An oil cylinder is arranged inside the body shell, a connecting steel pipe is arranged on the top of the oil cylinder, and an auxiliary component for leakage alarm is arranged at the connection between the oil cylinder and the connecting steel pipe.

[0009] Preferably, the auxiliary component includes a steel pipe connector, the bottom of which is fixedly connected to the top of the oil cylinder, the steel pipe connector is fixedly connected to the opening of the oil cylinder, the upper surface of the steel pipe connector is fixedly connected to a fixed shell, the upper surface of the fixed shell close to the inner end of the steel pipe connector is fixedly connected to a fixed annular plate, the outer surface of the fixed annular plate is slidably connected to a sliding annular plate, the steel pipe connector is located inside the fixed annular plate and the sliding annular plate and contacts their inner walls, the interior of the fixed shell is symmetrically and movably connected to a spring steel sheet, and the inner side of the spring steel sheet slides on the outer surface of the fixed annular plate.

[0010] Preferably, an arc groove is formed on the outer surface of the spring steel sheet, and a limiting column is fixedly connected to the inner wall of the fixed shell, and the limiting column is located inside the arc groove of the spring steel sheet.

[0011] Preferably, an O-ring is fixedly connected to the upper surface of the sliding annular plate, and the O-ring is located between the connecting steel pipe and the sliding annular plate.

[0012] Preferably, the auxiliary component also includes a partition plate, the bottom end of the partition plate is fixedly connected to the outer surface of the fixed shell, the partition plate is located at the connection between the steel pipe connector and the connecting steel pipe, the partition plate and the upper surface of the fixed shell are fixedly connected with a sealing plate, the upper surfaces of the partition plate and the fixed shell are both provided with annular grooves, and the bottom of the sealing plate is fixedly connected with two annular plates, and the size of the annular grooves is adapted to the size of the annular plates.

[0013] Preferably, the partition plate divides the space between the connecting steel pipe and the partition plate into four cavities, the connection between the connecting steel pipe and the steel pipe connector is located in the cavity, and the inner wall of the annular groove and the outer surface of the annular plate are both provided with a rubber layer.

[0014] Preferably, the outer surface of the partition plate is connected with four piston cylinders, and the interiors of the four piston cylinders are slidably connected with piston rods. The size of the piston rods near the steel pipe connector is matched with the inner wall size of the piston cylinder, and the inner wall of the sealing plate is fixedly connected with four alarm buttons.

[0015] Preferably, one end of the connecting steel pipe away from the oil cylinder is connected to the inside of the servo valve.

[0016] The bipolar plate hydraulic press and control system provided by the present invention have the following beneficial effects: 1. The fuselage shell is composed of a plate frame. The plate frame structure is welded as a whole to directly connect the upper and lower beams to the columns. The columns have large lateral dimensions and are mostly box-shaped structures. They have good bending resistance and can withstand large working loads, ensuring that the frame has high rigidity. The design of the plate frame structure is relatively simple and easy to manufacture and process. The overall welding method reduces the number of parts and the assembly process, thereby reducing production costs. In addition, due to the stable structure and easy maintenance, the additional production costs caused by complex structures are reduced.

[0017] 2. Through the controlled use of accumulators, servo valves, dual active proportional flow valves and booster tanks, and through the precise adjustment of the servo valves and dual active proportional flow valves, the system can achieve high-precision control of the actuators to meet complex and changing process requirements. The fast response characteristics of the accumulators and servo valves enable the system to quickly respond to changes in control signals and speed up production rhythm. By optimizing the output characteristics of the hydraulic system and reducing downtime, the system can achieve high-efficiency operation and improve production efficiency and product quality.

[0018] 3. The spring steel sheets are squeezed by rotating the connecting steel pipes. Since the spring steel sheets are symmetrically arranged, the two connecting steel pipes are deformed after being squeezed. After the spring steel sheets are deformed by pressure, elastic force is generated to push the connecting steel pipes in the opposite direction. In this way, the connecting steel pipes and the steel pipe connectors are tightly matched to prevent loosening. It can ensure that the connecting steel pipes will not loosen due to external force or vibration, thereby improving safety and stability, ensuring that the connections will not leak due to loosening, effectively avoiding the problem of oil leakage, and improving the working stability of the system. The use of O-rings improves the sealing of the connecting steel pipes, the steel pipe connectors, and the sliding annular plate connections, which can effectively fill the tiny gaps between the connections, thereby preventing fluids from leaking out of these gaps.

[0019] 4. Through the coordinated use of partition plates, sealing plates, piston rods and alarm buttons, the pressure changes at the connection between the steel pipe and the cylinder can be monitored in real time. Once a leak is detected, the piston rod will touch the alarm button to sound the alarm, and the alarm will immediately emit a sound or signal to alert the staff so that the staff can quickly discover the leakage problem and take corresponding measures. This device does not need to rely on electrical signals or complex sensor networks. It is relatively simple and works in a passive manner. It can be used as an additional safety mechanism to provide additional protection when other safety systems fail or are interfered with. Through the use of partition plates, the partition plates divide the connection between the steel pipe and the steel pipe connector into four cavities, each of which is provided with an alarm button. The distribution of multiple alarm buttons can ensure that when a leak occurs, the specific part of the leak can be quickly identified, thereby quickly responding and reducing the damage to the environment and the system caused by the leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 It is a side view of the overall structure of the present invention; Figure 3 This is a structural schematic diagram of the hydraulic workstation of the present invention; Figure 4 for Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of the internal structure of the auxiliary component of the present invention; Figure 6 It is a cross-sectional view of the auxiliary component structure of the present invention; Figure 7 It is a partial structural cross-sectional view of the auxiliary component of the present invention; Figure 8 for Figure 7 Enlarged structural diagram at B in the middle.

[0021] The numbers in the figure represent: 1. Body shell; 2. Control module; 21. Motor; 22. Oil pump; 23. Dual active proportional flow valve; 24. Pneumatic regulating valve; 25. Accumulator; 26. Servo valve; 27. Boosting oil tank; 28. Safety valve; 29. ​​Boosting valve; 3. Oil cylinder; 4. Connecting steel pipe; 5. Auxiliary components; 51. Steel pipe connector; 52. Fixed shell; 53. Fixed annular plate; 54. Sliding annular plate; 55. Spring steel sheet; 56. Limit column; 57. O-ring; 58. Partition plate; 59. Sealing plate; 510. Annular groove; 511. Annular plate; 512. Piston cylinder; 513. Piston rod; 514. Alarm button. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1 A bipolar plate hydraulic control system includes a bipolar plate hydraulic press, a control module 2, a pressure sensor and a communication module. The control module 2 includes a motor 21, an oil pump 22, a dual active proportional flow valve 23, a pneumatic regulating valve 24, an accumulator 25, a servo valve 26, a booster tank 27, a safety valve 28, a booster valve 29 and a communication module. The booster valve 29 is electrically connected to the oil pump 22 through the communication module and is used to control the pressure inside the booster tank 27. The inside of the booster tank 27 is fixedly connected with a pressure sensor. The pressure sensor is connected to the pressure sensor. The sensor is electrically connected to the safety valve 28 through the communication module and is used to control the opening and closing of the safety valve 28. The dual active proportional flow valve 23 controls the speed and flow of oil entering the cylinder 3 by connecting the steel pipe 4 and the motor 21 and the oil pump 22. The servo valve 26 is electrically connected to the cylinder 3 through the communication module and is used to control the rapid up and down movement of the cylinder 3. The pneumatic regulating valve 24 controls the direction of the oil in the booster tank 27 by connecting the steel pipe 4 and the motor 21 and the oil pump 22. The control module 2 is electrically connected to the hydraulic machine.

[0024] The accumulator 25 is used to store energy for return stroke and reduce the installed power of the whole machine. A filter is arranged in the connecting steel pipe 4. By filtering out fine particles of impurities in the oil, the filter can prevent parts from being damaged by abrasive wear, thereby extending the service life of the hydraulic components.

[0025] Compared with the prior art, the system achieves high-precision control of the actuators through the control of the accumulator 25, the servo valve 26, the dual active proportional flow valve 23 and the boost tank 27, meets the complex and changeable process requirements, enables the system to respond quickly to changes in control signals, speeds up production rhythm, and achieves high-efficiency operation and improves production efficiency and product quality by optimizing the output characteristics of the hydraulic system and reducing downtime.

[0026] Embodiment 2 refer to Figures 1 to 8 As shown, a preferred embodiment of the present invention will be described in detail below: The bipolar plate hydraulic press comprises a body shell 1, which is composed of a plate frame. An oil cylinder 3 is arranged inside the body shell 1, a connecting steel pipe 4 is arranged on the top of the oil cylinder 3, and an auxiliary component 5 for leakage alarm is arranged at the connection between the oil cylinder 3 and the connecting steel pipe 4. The body shell 1 is composed of a plate frame. By adopting a plate frame structure, the plate frame structure directly connects the upper and lower beams and the columns into a whole through integral welding. The columns have large lateral dimensions and are mostly box-shaped structures. They have good bending resistance and can withstand large working loads, ensuring that the frame has high rigidity. The design of the plate frame structure is relatively simple and easy to manufacture and process. The integral welding method reduces the number of parts and the assembly process, thereby reducing the production cost. In addition, due to the stable structure and easy maintenance, the additional production cost caused by the complex structure is reduced.

[0027] The auxiliary component 5 includes a steel pipe connector 51, the bottom of which is fixedly connected to the top of the oil cylinder 3, the steel pipe connector 51 is fixedly connected to the opening of the oil cylinder 3, the upper surface of the steel pipe connector 51 is fixedly connected to a fixed shell 52, the upper surface of the fixed shell 52 near the inner end of the steel pipe connector 51 is fixedly connected to a fixed annular plate 53, the outer surface of the fixed annular plate 53 is slidably connected to a sliding annular plate 54, the steel pipe connector 51 is located inside the fixed annular plate 53 and the sliding annular plate 54 and contacts their inner walls, the interior of the fixed shell 52 is symmetrically and movably connected to a spring steel sheet 55, the inner side of the spring steel sheet 55 slides on the outer surface of the fixed annular plate 53, and the outer surface of the spring steel sheet 55 is provided with an arc groove. The inner wall of the fixed shell 52 is fixedly connected with a limiting column 56, and the limiting column 56 is located inside the arc groove of the spring steel sheet 55. The limiting column 56 is used to prevent the spring steel sheet 55 from moving and deviating during the extrusion process. The spring steel sheet 55 is squeezed by rotating the connecting steel pipe 4. Since the spring steel sheet 55 is symmetrically arranged, it is deformed after being squeezed. After the spring steel sheet 55 is deformed by pressure, it generates elastic force to push the connecting steel pipe 4 in the opposite direction. In this way, the connecting steel pipe 4 and the steel pipe connector 51 are tightly matched to prevent loosening, and can ensure that the connecting steel pipe 4 will not loosen due to external force or vibration, thereby improving safety and stability, ensuring that the connection will not leak due to loosening, effectively avoiding the problem of oil leakage, and improving the working stability of the system.

[0028] An O-ring 57 is fixedly connected to the upper surface of the sliding annular plate 54, and the O-ring 57 is located between the connecting steel pipe 4 and the sliding annular plate 54. The use of the O-ring 57 improves the sealing performance of the connection between the connecting steel pipe 4 and the steel pipe connector 51 and the sliding annular plate 54, and it can effectively fill the tiny gaps between the connections, thereby preventing fluid from leaking out of these gaps.

[0029] Compared with the prior art, the device pushes the connecting steel pipe 4 in the opposite direction through elastic force, so that the connecting steel pipe 4 and the connecting piece fit tightly together, which can prevent loosening and ensure that the connecting steel pipe 4 will not loosen due to external force or vibration, thereby improving safety and stability. The spring steel sheet 55 can absorb vibration force and reduce the impact of vibration on the connecting steel pipe 4 and the steel pipe connector 51.

[0030] The auxiliary component 5 also includes a partition plate 58, the bottom end of the partition plate 58 is fixedly connected to the outer surface of the fixed shell 52, the partition plate 58 is located at the connection between the steel pipe connector 51 and the connecting steel pipe 4, and a sealing plate 59 is fixedly connected to the upper surface of the partition plate 58 and the fixed shell 52. An annular groove 510 is provided on the upper surface of the partition plate 58 and the fixed shell 52, and two annular plates 511 are fixedly connected to the bottom of the sealing plate 59, and the size of the annular groove 510 is adapted to the size of the annular plate 511.

[0031] The partition plate 58 divides the space between the connecting steel pipe 4 and the partition plate 58 into four cavities. The connection between the connecting steel pipe 4 and the steel pipe connector 51 is located in the cavity. The inner wall of the annular groove 510 and the outer surface of the annular plate 511 are both provided with a rubber layer to prevent the partition plate 58 from being breathable and avoid poor sealing.

[0032] The outer surface of the partition plate 58 is connected with four piston cylinders 512, and the interiors of the four piston cylinders 512 are slidably connected with piston rods 513. The size of the piston rod 513 near the end of the steel pipe connector 51 is matched with the inner wall size of the piston cylinder 512. The inner wall of the sealing plate 59 is fixedly connected with four alarm buttons 514. The end of the connecting steel pipe 4 away from the cylinder 3 is connected with the interior of the servo valve 26. Through the use of the partition plate 58, the partition plate 58 divides the connection between the connecting steel pipe 4 and the steel pipe connector 51 into four cavities, and each part is provided with an alarm button 514. The distribution of multiple alarm buttons 514 can ensure that when a leak occurs, the specific part of the leak can be quickly identified, thereby quickly responding and reducing the damage to the environment and the system caused by the leak. The alarm button 514 and the piston rod 513 are on the same horizontal plane, and the movement of the piston rod 513 will touch the alarm button 514.

[0033] Compared with existing technologies, this device can monitor pressure changes at the connection in real time. Once a leak is detected, the alarm will immediately emit a sound or signal to alert staff. This device does not need to rely on electrical signals or complex sensor networks. It is relatively simple and works in a passive manner. It can serve as an additional safety mechanism to provide additional protection when other safety systems fail or are interfered with.

[0034] The following is the entire working process and working principle of the above embodiment: Specific and detailed implementation of the hydraulic control system: The air is compressed to 0.5Mpa and the pressure of the boost tank 27 is increased to 1Mpa through the boost valve 29 and the pressure is detected by the pressure sensor. When the pressure is greater than the set value of the safety valve 28, the safety valve 28 releases the pressure, and then the dual active proportional flow valve 23 is quickly opened through the boost tank 27, and the upper chamber of the cylinder 3 is quickly filled with oil to achieve fast descent. When the hydraulic press maintains pressure, the oil pump 22 and the motor 21 work to pump oil into the accumulator 25 to store energy for the return stroke and reduce the installed power of the whole machine. Then, the servo valve 26 responds quickly and accurately to control the up and down movement of the cylinder 3, and finally the pneumatic adjustment is used. The throttle valve 24 returns the oil in the boost tank 27 to the main tank. Through the control and use of the accumulator 25, the servo valve 26, the dual active proportional flow valve 23 and the boost tank 27, and through the precise adjustment of the servo valve 26 and the dual active proportional flow valve 23, the system can achieve high-precision control of the actuators to meet the complex and changing process requirements. The fast response characteristics of the accumulator 25 and the servo valve 26 enable the system to quickly respond to changes in control signals and speed up the production rhythm. By optimizing the output characteristics of the hydraulic system and reducing downtime, the system can achieve high-efficiency operation and improve production efficiency and product quality.

[0035] In the initial state, the spring steel sheet 55 is not compressed. When the connecting steel pipe 4 is connected to the steel pipe connector 51, it only needs to be connected to the outer surface of the steel pipe connector 51 by rotating the connecting steel pipe 4. When the connecting steel pipe 4 rotates, it will touch the O-ring 57. The O-ring 57 drives the sliding annular plate 54 to squeeze the spring steel sheet 55 downward to deform it. The sliding annular plate 54 slides on the surface of the fixed annular plate 53. Since the two spring steel sheets 55 are symmetrically arranged, the spring steel sheet 55 is deformed by pressure and generates elastic force to push the connecting steel pipe 4 in the opposite direction, so that The connecting steel pipe 4 and the steel pipe connector 51 fit tightly together to prevent loosening, and can ensure that the connecting steel pipe 4 will not loosen due to external force or vibration, thereby improving safety and stability, ensuring that the connection will not leak due to loosening, effectively avoiding the problem of oil leakage, and improving the working stability of the system. The use of O-ring 57 improves the sealing performance of the connection between the connecting steel pipe 4 and the steel pipe connector 51 and the sliding annular plate 54, and it can effectively fill the tiny gaps between the connections, thereby preventing fluids from leaking out of these gaps.

[0036] After the connecting steel pipe 4 and the steel pipe connector 51 are installed and stabilized, the movable sealing plate 59 drives the annular plate 511 to enter the interior of the annular groove 510. The inner wall of the annular groove 510 and the outer surface of the annular plate 511 are both provided with a rubber layer to prevent the partition plate 58 from being breathable and to avoid poor sealing. The sealing plate 59 blocks the upper opening of the fixed shell 52. If leakage occurs between the connecting steel pipe 4 and the oil cylinder 3 after long-term use, the interior of the partition plate 58 will be filled with oil, causing the air pressure to increase, which will push the piston rod 513 to move away from the steel pipe connector 51. The alarm button 514 and the piston rod 513 are at the same horizontal plane. After the piston rod 513 moves and touches the alarm button 514, an alarm is triggered. The device will immediately make a sound or signal to alert the staff so that the staff can quickly discover the leakage problem and take corresponding measures. This device does not need to rely on electrical signals or complex sensor networks. It is relatively simple and works in a passive manner. It can be used as an additional safety mechanism to provide additional protection when other safety systems fail or are interfered with. Through the use of the partition plate 58, the partition plate 58 divides the connection between the steel pipe 4 and the steel pipe connector 51 into four cavities, each of which is provided with an alarm button 514. The distribution of multiple alarm buttons 514 can ensure that when a leak occurs, the specific part of the leak can be quickly identified, thereby quickly responding and reducing the damage to the environment and the system caused by the leak.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bipolar plate hydraulic control system, characterized in that: The invention comprises a bipolar plate hydraulic press, a control module (2), a pressure sensor and a communication module. The control module (2) comprises a motor (21), an oil pump (22), a dual active proportional flow valve (23), a pneumatic regulating valve (24), an accumulator (25), a servo valve (26), a boosting oil tank (27), a safety valve (28), a boosting valve (29) and a communication module. The boosting valve (29) is electrically connected to the oil pump (22) via the communication module and is used to control the pressure inside the boosting oil tank (27). The inside of the boosting oil tank (27) is fixedly connected with a pressure sensor. The pressure sensor is connected to the boosting oil tank (27) via the communication module. After being electrically connected to the safety valve (28), it is used to control the opening and closing of the safety valve (28); the dual active proportional flow valve (23) controls the speed and flow rate of oil entering the cylinder (3) by connecting the steel pipe (4) and the motor (21) and the oil pump (22); the servo valve (26) is used to control the rapid up and down movement of the cylinder (3) after being electrically connected to the cylinder (3) through the communication module; the pneumatic regulating valve (24) controls the direction of oil in the booster tank (27) by connecting the steel pipe (4) and the motor (21) and the oil pump (22); and the control module (2) is electrically connected to the hydraulic machine.

2. A bipolar plate hydraulic press, applied to a bipolar plate hydraulic control system according to claim 1, characterized in that: The invention comprises a body shell (1), wherein the body shell (1) is composed of a plate frame, an oil cylinder (3) is arranged inside the body shell (1), a connecting steel pipe (4) is arranged on the top of the oil cylinder (3), and an auxiliary component (5) for leakage alarm is arranged at the connection between the oil cylinder (3) and the connecting steel pipe (4).

3. A bipolar plate hydraulic press according to claim 2, characterized in that: The auxiliary component (5) comprises a steel pipe connector (51), the bottom of which is fixedly connected to the top of the oil cylinder (3), the steel pipe connector (51) is fixedly connected to the opening of the oil cylinder (3), the upper surface of the steel pipe connector (51) is fixedly connected to a fixed shell (52), the upper surface of the fixed shell (52) close to the inner end of the steel pipe connector (51) is fixedly connected to a fixed annular plate (53), the outer surface of the fixed annular plate (53) is slidably connected to a sliding annular plate (54), the steel pipe connector (51) is located inside the fixed annular plate (53) and the sliding annular plate (54) and contacts the inner walls thereof, the interior of the fixed shell (52) is symmetrically and movably connected to a spring steel sheet (55), the inner side of the spring steel sheet (55) slides on the outer surface of the fixed annular plate (53).

4. A bipolar plate hydraulic press according to claim 3, characterized in that: An arc groove is formed on the outer surface of the spring steel sheet (55); a limiting column (56) is fixedly connected to the inner wall of the fixed shell (52); and the limiting column (56) is located inside the arc groove of the spring steel sheet (55).

5. A bipolar plate hydraulic press according to claim 3, characterized in that: An O-shaped gasket (57) is fixedly connected to the upper surface of the sliding circular ring plate (54), and the O-shaped gasket (57) is located between the connecting steel pipe (4) and the sliding circular ring plate (54).

6. A bipolar plate hydraulic press according to claim 3, characterized in that: The auxiliary component (5) further comprises a partition plate (58), the bottom end of which is fixedly connected to the outer surface of the fixed shell (52), the partition plate (58) being located at the connection between the steel pipe connector (51) and the connecting steel pipe (4), the partition plate (58) and the upper surface of the fixed shell (52) being fixedly connected to a sealing plate (59), the upper surfaces of the partition plate (58) and the fixed shell (52) both being provided with an annular groove (510), the bottom of the sealing plate (59) being fixedly connected to two annular plates (511), the size of the annular groove (510) being adapted to the size of the annular plates (511).

7. A bipolar plate hydraulic press according to claim 6, characterized in that: The partition plate (58) divides the space between the connecting steel pipe (4) and the partition plate (58) into four cavities, the connection between the connecting steel pipe (4) and the steel pipe connector (51) is located in the cavity, and the inner wall of the annular groove (510) and the outer surface of the annular plate (511) are both provided with a rubber layer.

8. A bipolar plate hydraulic press according to claim 6, characterized in that: Four piston cylinders (512) are connected through the outer surface of the partition plate (58), and piston rods (513) are slidably connected inside the four piston cylinders (512). The size of the piston rod (513) at one end close to the steel pipe connector (51) matches the size of the inner wall of the piston cylinder (512), and four alarm buttons (514) are fixedly connected to the inner wall of the sealing plate (59).

9. A bipolar plate hydraulic press according to claim 2, characterized in that: One end of the connecting steel pipe (4) away from the oil cylinder (3) is connected to the inside of the servo valve (26).

Images