Pressurizing device

Abstract

The application relates to a pressurizing device and relates to the technical field of fuel cell testing equipment. The pressurizing device is provided with a heat dissipation structure, heat generated during the pressurizing process can be effectively dissipated, the problem of overheating of the device is avoided, and the testing precision and service life are improved. Moreover, the pressurizing device can realize real-time monitoring of the actual compression amount of the electric pile under different pressures when the electric pile is operated at high temperature, and the change of the load pressure of the electric pile under the same compression amount with the change of temperature.

Description

Technical Field

[0001] This application relates to the field of fuel cell testing equipment technology, and in particular to a pressurization device. Background Technology

[0002] A fuel cell is an electrochemical device that converts the chemical energy of fuel (such as hydrogen) into electrical energy. In practical applications, a fuel cell typically consists of a stack of hundreds of individual cells connected in series. Assembly errors in each individual cell will affect the performance of the stack. Among these, the assembly pressure of the stack is one of the most important parameters affecting fuel cell performance.

[0003] If the assembly pressure of the fuel cell stack is too low, it will lead to fuel leakage or excessive contact resistance, thereby reducing the output power of the fuel cell. If the assembly pressure of the fuel cell stack is too high, it will cause excessive pressure in each individual cell, which can damage the membrane electrode assembly and even hinder the passage of gases participating in the electrochemical reaction, thus reducing the output power of the fuel cell.

[0004] During the testing of fuel cell output power, assembly pressure needs to be applied to the stack to connect the individual cells in series. In related technologies, the different expansion coefficients of materials within the stack and external accessories cause the initial compression pressure to change with temperature during pressurization, making accurate measurement and control of the actual pressure difficult. Therefore, designing a pressurization device that can effectively exchange heat during pressurization has become a pressing technical problem. Utility Model Content

[0005] This application provides a pressurizing device that improves the heat exchange efficiency of the pressurizing device during operation by setting a heat dissipation structure, thereby at least partially solving the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a pressurizing device is provided, comprising:

[0007] Electric motor;

[0008] A pressure sensor has a first end and a second end that are opposite to each other in a first direction, and a motor is connected to the first end of the pressure sensor.

[0009] The pressure rod assembly has a pressure rod body and a heat dissipation structure. The pressure rod body is connected to the second end of the pressure sensor, and the heat dissipation structure is thermally connected to the pressure rod body.

[0010] In some embodiments, a first cooling cavity is provided inside the heat dissipation structure;

[0011] Multiple first partition plates are disposed within the first cooling chamber; and

[0012] Multiple second partition plates are disposed within the first cooling chamber;

[0013] Each first partition plate is connected to the top wall and side wall of the first cooling chamber along the first direction, and each second partition plate is connected to the bottom wall and side wall of the first cooling chamber along the first direction. The first partition plates and the second partition plates are arranged in sequence at intervals in the second direction to form a first cooling channel with fluid communication.

[0014] In some embodiments, the heat dissipation structure has a connecting hole that extends along a first direction;

[0015] The heat dissipation structure has a first inlet and a first outlet that extend along the second direction, and the first inlet and the first outlet are respectively connected to the first cooling channel.

[0016] In some embodiments, a second cooling cavity is provided inside the heat dissipation structure, and a plurality of third partition plates are disposed in the second cooling cavity and extend along a second direction;

[0017] Multiple fourth partition plates are disposed within the second cooling chamber and extend along the second direction;

[0018] The third and fourth partition plates are arranged alternately in the first direction to form a second cooling channel with fluid communication.

[0019] In some embodiments, each third partition plate is connected to the inner wall of the second cooling chamber in the second direction, and a portion of the third partition plate has a first gap with the inner wall of the second cooling chamber; each fourth partition plate is connected to the inner wall of the second cooling chamber in the second direction, and a portion of the fourth partition plate has a second gap with the inner wall of the second cooling chamber.

[0020] The first gap and the second gap are positioned far apart from each other in the second direction;

[0021] The orthographic projection of the third partition plate in the first direction partially overlaps with the orthographic projection of the fourth partition plate in the first direction.

[0022] In some embodiments, the pressure bar body has a second inlet and a second outlet communicating with the second cooling channel. The second inlet is located on the side closer to the motor, and the second outlet is located on the side farther from the motor.

[0023] In some embodiments, a third cooling cavity is provided inside the heat dissipation structure.

[0024] The heat exchange coil is located inside the third cooling chamber;

[0025] A thermally conductive structure is incorporated into the third cooling cavity and wraps around the outer periphery of the heat exchange coil.

[0026] The heat dissipation structure has a first through hole and a second through hole. The first through hole is located on the side away from the motor, and the second through hole is located on the side closer to the motor.

[0027] One end of the heat dissipation structure passes through the first through hole, and the other end passes through the second through hole.

[0028] In some embodiments, the melting point of the thermally conductive structure is lower than that of the heat dissipation structure.

[0029] In some embodiments, the heat dissipation structure includes a plurality of spaced heat exchange columns.

[0030] In some embodiments, the pressurizing device further includes:

[0031] The pressure bar body includes a first connecting column and a second connecting column, and each heat exchange column is connected between the first connecting column and the second connecting column in a first direction;

[0032] Among them, the projected area of ​​the multiple heat exchange columns on the plane perpendicular to the first direction is smaller than the projected area of ​​the first connecting column or the second connecting column on the plane perpendicular to the first direction.

[0033] In some embodiments, the pressurizing device further includes:

[0034] The first connector is connected between the motor and the pressure sensor in a first direction;

[0035] The second connector is connected between the pressure rod body and the pressure sensor in the first direction.

[0036] In some embodiments, the heat dissipation structure and the pressure rod body are either an integrated structure or separate structures.

[0037] In the pressurization device of this application embodiment, by incorporating a heat dissipation structure, the heat generated during the pressurization process is effectively dissipated, avoiding overheating and improving working efficiency and service life. Furthermore, this pressurization device can monitor in real time the actual compression of the fuel cell stack under different pressures during high-temperature operation, as well as the change in the load pressure of the fuel cell stack with temperature changes at the same compression level.

[0038] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0041] Figure 1 This is a schematic diagram of the pressurization system provided in the embodiments of this application;

[0042] Figure 2 This is a first-view structural schematic diagram of the pressurization device provided in the embodiments of this application;

[0043] Figure 3 This is a second-view structural schematic diagram of the pressurization device provided in the embodiments of this application;

[0044] Figure 4 This is a cross-sectional view of the first pressurization device provided in the embodiments of this application;

[0045] Figure 5 This is a cross-sectional view of the second pressurization device provided in the embodiments of this application;

[0046] Figure 6 This is a schematic diagram of the structure of the first connector provided in an embodiment of this application;

[0047] Figure 7 This is a schematic diagram of the first heat dissipation structure provided in the embodiments of this application;

[0048] Figure 8 yes Figure 7 Internal sectional view;

[0049] Figure 9 This is a schematic diagram of the structure of the first type of pressure bar assembly provided in the embodiments of this application;

[0050] Figure 10 yes Figure 9 A sectional view;

[0051] Figure 11 This is an exploded view of the second type of pressure bar assembly provided in the embodiments of this application;

[0052] Figure 12 This is a schematic diagram of the overall structure of the second type of pressure bar assembly provided in the embodiments of this application;

[0053] Figure 13 This is a cross-sectional view of the second type of pressure bar assembly provided in the embodiments of this application;

[0054] Figure 14 This is an exploded view of the third type of pressure bar assembly provided in the embodiments of this application;

[0055] Figure 15 This is a schematic diagram of the overall structure of the third type of pressure bar assembly provided in the embodiments of this application;

[0056] Figure 16 This is a cross-sectional view of the third type of pressure bar assembly provided in the embodiments of this application;

[0057] Figure 17 This is a schematic diagram of the overall structure of the fourth type of pressure bar assembly provided in the embodiments of this application.

[0058] Explanation of reference numerals in the attached figures:

[0059] Y - First direction; X - Second direction;

[0060] 10-Motor;

[0061] 20 - Pressure sensor; 21 - First mounting hole; 22 - Second mounting hole; 23 - Fourth mounting hole;

[0062] 30 - Compression bar assembly;

[0063] 40 - First connector; 41 - First connecting part; 42 - Third fixing hole; 43 - Second connecting part;

[0064] 50 - Second connector; 51 - Fifth fixing hole; 52 - Sixth fixing hole;

[0065] 60 - Fastener;

[0066] 3101 - Pressure bar body; 3102 - Heat dissipation structure;

[0067] 31-Annular component; 32-First partition plate; 33-Second partition plate; 34-First cooling chamber; 35-Annular top plate; 36-Annular bottom plate; 37-Inner side plate; 38-Outer side plate; 39-First opening; 310-Second opening; 311-First cooling channel; 312-First sub-channel; 313-Connecting hole; 314-First inlet; 315-First outlet;

[0068] 303 - Second cooling chamber; 304 - Third partition plate; 305 - Fourth partition plate; 306 - First gap; 307 - Second gap; 308 - Second inlet; 309 - Second outlet; 3010 - Second cooling channel; 3011 - Second sub-channel; 3041 - Third partition section; 3051 - Fourth partition section; 3012 - Sub-cooling chamber; 3013 - Third gap; 3014 - Fourth gap; 3015 - First fixing cap; 3016 - Heat exchange section;

[0069] 3001 - Third cooling chamber; 3002 - Third cooling channel; 3003 - Third inlet; 3004 - Third outlet; 3005 - Heat-conducting structure; 3006 - First through hole; 3007 - Second through hole; 3008 - Opening; 3009 - Second fixing cap; 30010 - Heat exchange coil;

[0070] 3110 - First connecting column; 3111 - Second connecting column; 3112 - Heat exchange column;

[0071] 80 - Electric cylinder; 90 - PLC controller. Detailed Implementation

[0072] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0073] Hydrogen energy, as the ultimate energy source of the future, has seen relatively slow development due to the challenges of its transportation and storage. However, with the advocacy of carbon peaking and carbon neutrality, the development of hydrogen energy, particularly the demand for green hydrogen, has been elevated to a new level both domestically and internationally. SOEC, one of the three most widely accepted clean hydrogen production methods (alkaline electrolyzers, PEMEC (Proton Exchange Membrane Electrolyzer Cell), and SOEC (Solid Oxide Electrolyzer Cell), has attracted widespread attention due to its advantages such as high conversion efficiency, zero pollution, and the absence of precious metal catalysts.

[0074] Solid oxide fuel cell stacks possess excellent electrochemical performance due to their ability to operate at high temperatures, achieving power generation efficiencies of up to 60% and electrolysis efficiencies exceeding 90%. However, their all-solid-state structure, constructed entirely of inorganic non-metallic and metallic materials, makes contact between components difficult, resulting in high contact resistance. Therefore, the stack requires securing it. Common methods include cylinder pressurization, screw tightening, servo motor pressurization, or direct loading with heavy objects (such as steel blocks or bricks), typically with loading pressures between 100 kg and 400 kg. While direct loading is theoretically the optimal pressurization method, it requires manual placement and is bulky, making it suitable only for applications with relatively small single-cell loads.

[0075] Existing technologies use bolt tightening for pressurization. While screw tightening is a relatively simple and easy-to-operate pressurization method, considering the different expansion coefficients of various internal parts of the fuel cell stack and external accessory materials, the initial compression pressure will change with subsequent expansion coefficients, making it impossible to know the actual pressure. Cylinder pressurization can monitor pressure in real time and adjust itself according to the compression caused by temperature changes in the fuel cell stack. However, compared to some hydraulic or electric pressurization systems, cylinder pressurization has relatively poor pressure stability. Furthermore, due to the compressibility of gas, it is easily affected by fluctuations in gas source pressure and changes in pipeline resistance during pressurization, leading to pressure fluctuations and making it difficult to maintain precise and stable pressure output. Additionally, the cylinder has a response delay during start-up and shutdown because the gas charging and discharging process takes time. Especially in work scenarios requiring rapid and frequent start-ups and shutdowns, the cylinder's response speed may not meet requirements, affecting work efficiency and control accuracy.

[0076] The existing technology proposes an electric cylinder pressurization method, which can avoid the instability caused by the cylinder. In addition, it can monitor the pressure of the fuel cell stack in real time. Its purpose is to pressurize the fuel cell stack. However, since a spring is added between the pressure rod and the electric cylinder, it is not possible to measure the compression of the fuel cell stack, nor can the relationship between the pressure and the compression and temperature be obtained.

[0077] In future applications of fuel cell stacks, screw fastening will most likely be used for pressurization. However, considering the unpredictable internal pressure of screw-fastened fuel cell stacks after heating, this is problematic.

[0078] In view of this, this application provides a pressurization device. By incorporating a heat dissipation structure within the pressurization device, the heat generated during the pressurization process is effectively dissipated, preventing overheating and improving working efficiency and service life. Furthermore, this pressurization device can monitor in real time the actual compression of the fuel cell stack under different pressures during high-temperature operation, as well as the change in the load pressure of the fuel cell stack with temperature at the same compression level. A detailed description follows with reference to the accompanying drawings.

[0079] Please see Figure 1 This application provides a pressurizing device, which includes intersecting first direction Y and second direction X (see...). Figure 7 ).

[0080] Please see Figure 2 and Figure 3The pressurization device includes a motor 10, a pressure sensor 20, and a pressure rod assembly 30. The pressure sensor 20 has a first end and a second end opposite to each other in a first direction Y. The motor 10 is connected to the first end of the pressure sensor 20, and the pressure rod body 3101 is connected to the second end of the pressure sensor 20. The pressure rod assembly 30 includes a pressure rod body 3101 and a heat dissipation structure 3102, which is thermally connected to the pressure rod body 3101. Since the performance of the pressure sensor 20 is affected by temperature changes, the thermal connection between the heat dissipation structure 3102 and the pressure rod body 3101 helps to evenly distribute the temperature of the pressure rod body 3101, reducing the impact of temperature on the pressure sensor 20 and improving the accuracy and reliability of pressure measurement.

[0081] The compression member assembly 30 can be a columnar structure. The first direction Y can be the axial direction of the compression member assembly 30, and the second direction X can be the radial direction of the compression member assembly 30. No special limitation is made here.

[0082] Please see Figure 4 In some embodiments, the pressure sensor 20 has a first fixing hole 21 on the side facing the motor 10, and the output shaft of the motor 10 is disposed in the first fixing hole 21 and rotatably connected to the pressure sensor 20. The pressure sensor 20 has a second fixing hole 22 on the side facing the pressure rod assembly 30, and the pressure rod body 3101 is disposed in the second fixing hole 22 and rotatably connected to the pressure sensor 20. Thus, through this rotatable connection, the output shaft of the motor 10 and the pressure rod body 3101 can rotate freely within a certain range, which helps to reduce stress concentration caused by misalignment or slight mechanical errors when pressure is applied, thereby improving the reliability of the system.

[0083] Please see Figure 5 In some embodiments, the pressurizing device further includes a first connector 40 and a second connector 50. The first connector 40 is connected between the motor 10 and the pressure sensor 20 in the first direction Y; the second connector 50 is connected between the pressure rod body 3101 and the pressure sensor 20 in the first direction Y.

[0084] Specifically, please refer to Figure 5 and Figure 6The pressure sensor 20 has a first fixing hole 21 on the side facing the motor 10. The first connector 40 includes a first connecting portion 41 and a second connecting portion 43 connected along a first direction Y. The first connecting portion 41 has a third fixing hole 42 on the side facing the motor 10, and the output shaft of the motor 10 is disposed in the third fixing hole 42 and rotatably connected to the first connecting portion 41 of the first connector 40. The end of the second connecting portion 43 away from the motor 10 is disposed in the first fixing hole 21 and rotatably connected to the pressure sensor 20. In this way, connecting the first connector 40 between the motor 10 and the pressure sensor 20 can absorb vibration and impact from the motor 10 to a certain extent, reduce the direct impact on the pressure sensor 20, thereby improving the stability and durability of the pressurization device, while ensuring that the pressure sensor 20 can accurately measure the output force from the motor 10.

[0085] Please see Figure 5 The pressure sensor 20 has a fourth fixing hole 23 on the side facing the pressure rod body 3101. The second connector 50 has a fifth fixing hole 51 communicating with the fourth fixing hole 23, and a sixth fixing hole 52 on the side facing the pressure rod body 3101. The fixing member 60 passes through the fourth fixing hole 23 and the fifth fixing hole 51, and one end of the pressure rod body 3101 is located in the sixth fixing hole 52 and rotatably connected to the second connector 50. That is, by placing the fixing member 60 in the fourth fixing hole 23 and the fifth fixing hole 51, a strong connection between the pressure sensor 20 and the second connector 50 is ensured, reducing the risk of loosening or displacement, thereby improving the reliability of the pressurizing device. The second connector 50 is connected to the pressure rod body 3101 through the sixth fixing hole 52, ensuring that the path of force transmission from the pressure rod body 3101 to the pressure sensor 20 through the second connector 50 is direct and effective, reducing losses and errors during force transmission.

[0086] The axial alignment of the first fixing hole 21 and the sixth fixing hole 52 makes the force transmission path of the pressurizing device more direct and linear, reducing possible deviations and losses during force transmission, and ensuring that the pressure sensor 20 can accurately measure the force applied by the pressure rod body 3101.

[0087] Therefore, the pressurizing device provided in this application, by providing a first connecting member 40 between the motor 10 and the pressure sensor 20, and a second connecting member 50 between the pressure rod body 3101 and the pressure sensor 20, can provide a stable connection and an optimized force transmission path, and can effectively improve the performance and reliability of the pressurizing device.

[0088] Please see Figure 1In some embodiments, the heat dissipation structure 3102 and the pressure rod body 3101 are separate structures. For example, the heat dissipation structure 3102 is sleeved on the pressure rod body 3101.

[0089] For details, please refer to Figure 7 and Figure 8 The heat dissipation structure 3102 includes an annular component 31, a plurality of first partition plates 32 and a plurality of second partition plates 33.

[0090] Please see Figure 7 and Figure 8 The annular part 31 has a connecting hole 313 that extends along the first direction Y. One end of the pressure rod body 3101 is disposed in the connecting hole 313, and the annular part 31 is provided with a first cooling chamber 34.

[0091] It is understood that the annular component 31 includes an annular top plate 35, an annular bottom plate 36, an inner side plate 37, and an outer side plate 38. The annular top plate 35 and the annular bottom plate 36 are arranged opposite each other in the first direction Y. The inner side plate 37 and the outer side plate 38 are respectively connected between the annular top plate 35 and the annular bottom plate 36, and the four components cooperate to form a first cooling cavity 34. Among them, the inner side plate 37 and the outer side plate 38 are hollow cylinders of different sizes.

[0092] Please see Figure 8 The annular top plate 35 has a first opening 39, and the annular bottom plate 36 has a second opening 310 that communicates with the first opening 39. The inner side plate 37 has a connecting hole 313, which communicates with the first opening 39 and the second opening 310 in the first direction Y, respectively, to form the connecting hole 313 of the annular member 31. The inner surface of the connecting hole 313 has a threaded structure so that the pressure rod body 3101 and the annular member 31 are fixed by rotational connection.

[0093] Please see Figure 8 Multiple first partition plates 32 are disposed within the first cooling chamber 34. Multiple second partition plates 33 are disposed within the first cooling chamber 34. Each first partition plate 32 is connected to the top wall and side wall of the first cooling chamber 34 along the first direction Y, and each second partition plate 33 is connected to the bottom wall and side wall of the first cooling chamber 34 along the first direction Y. The first partition plates 32 and second partition plates 33 are arranged sequentially at intervals in the second direction X to form a fluid-connected first cooling channel 311.

[0094] It is understood that each first partition plate 32 is connected to the annular top plate 35, the inner side plate 37, and the outer side plate 38, respectively, and each second partition plate 33 is connected to the annular bottom plate 36, the inner side plate 37, and the outer side plate 38, respectively. The orthographic projection of the first partition plate 32 in the second direction X and the orthographic projection of the second partition plate 33 in the second direction X partially coincide, so as to form a meandering first cooling channel 311 in the first cooling cavity 34. The first cooling channel 311 has multiple first sub-channels 312 spaced apart in the second direction X, wherein the first sub-channels 312 are formed by the interval between adjacent first partition plates 32 and second partition plates 33, or by the interval between the first partition plate 32 and the inner wall of the first cooling cavity 34, or by the interval between the second partition plate 33 and the inner wall of the first cooling cavity 34. The interval between each first partition plate 32 and the annular bottom plate 36 and the interval between each second partition plate 33 and the annular top plate 35 serve as the connection port between two adjacent first sub-channels 312. Therefore, the first cooling channel 311 has multiple first sub-channels 312 spaced apart in the second direction X, which can extend the path of the first cooling channel 311, allowing the fluid to stay in the first cooling channel 311 for a longer time and absorb heat more fully, thereby improving the cooling efficiency.

[0095] In some embodiments, please refer to Figure 8 The annular component 31 has a first inlet 314 and a first outlet 315 extending along the second direction X, and the first inlet 314 and the first outlet 315 are respectively connected to the first cooling channel 311. It can be understood that the first inlet 314 and the first outlet 315 are located on opposite sides in the second direction X, and both of them penetrate the outer side plate 38 of the annular component 31. Fluid (e.g., coolant) flows into the first cooling channel 311 from the first inlet 314 and flows out from the first outlet 315, ensuring a more uniform temperature distribution in the cooling channel, reducing local overheating, and providing a more stable cooling effect.

[0096] In other embodiments, each first partition plate 32 is connected to the inner side plate 37 in the second direction X, and each second partition plate 33 is connected to the outer side plate 38 in the second direction X. The first partition plates 32 and the second partition plates 33 are arranged alternately in the first direction Y to form a first cooling channel 311. In this case, the annular bottom plate 36 has a first inlet 314, and the annular top plate 35 has a first outlet 315. The first inlet 314 is located close to the pressure bar body 3101. Therefore, fluid (e.g., coolant) flows into the first cooling channel 311 from the first inlet 314 and finally flows out from the first outlet 315. During this process, when the fluid flows into the first inlet 314, the fluid can contact the pressure bar body 3101 (heat source) immediately to quickly cool the pressure bar body 3101, ensuring that it remains within a suitable temperature range during operation and reducing performance degradation or damage caused by overheating.

[0097] In other embodiments, the heat dissipation structure 3102 and the pressure rod body 3101 are an integral structure. For example, the heat dissipation structure 3102 and the pressure rod body 3101 are integrated into one piece, which reduces the number of connecting parts, thereby improving the strength and stability of the overall structure, and reducing the interfaces in the heat conduction path, thereby improving the heat conduction efficiency and helping to dissipate heat more effectively.

[0098] Please see Figure 1 The pressurizing device provided in this application embodiment also includes an electric cylinder 80, which is connected to the motor 10.

[0099] Please see Figure 1 This application also provides a pressurization system, including the aforementioned pressurization device, a touch screen (not shown), and a PLC controller 90, which are interconnected. The PLC controller 90 controls the operation of the electric cylinder 80, the electric cylinder 80 monitors the compression value, and the pressure sensor 20 monitors the force on the fuel cell stack, establishing a relationship between the load pressure and compression amount for different types of fuel cell stacks.

[0100] During operation, the end of the pressure rod body 3101 (the end furthest from the motor 10) directly contacts the upper end plate of the fuel cell stack or a flat plate with a hemispherical shape. By inputting commands to the touchscreen, the PLC controller 90 sends a signal to the motor 10. Upon receiving the signal, the motor 10 executes the program and simultaneously records the compression amount. Additionally, the pressure sensor 20 measures the loading pressure and feeds back both the compression amount and pressure data to the PLC controller 90, displaying them synchronously on the touchscreen. Finally, based on the feedback values, commands are synchronously issued to the PLC controller 90.

[0101] The pressurization device provided in this application embodiment measures the compression amount in the following ways:

[0102] The pressure sensor 20 can be a linear displacement sensor. The linear displacement sensor is installed on the first connector 40 of the servo motor 10. When the electric cylinder 80 applies pressure to push the object with the pressure rod body 3101 to generate compression, the linear displacement sensor can directly measure the linear displacement change of the pressure rod body 3101. This displacement change corresponds to the amount of compression of the object.

[0103] The pressure sensor 20 can be a rotary displacement sensor. For example, a rotary displacement sensor can be installed on the output shaft of the motor 10. By measuring the rotation angle θ of the pressure rod body 3101, and then calculating the compression amount L = (θ / 2π) × p based on the pitch p of the pressure rod body 3101.

[0104] Motor 10 encoder feedback: The motor 10 of the electric cylinder 80 is equipped with an encoder to provide feedback on information such as the rotation angle and speed of the motor 10. The PLC control system can calculate the displacement L = n / (N×i)×p of the pressure rod body 3101 based on the feedback data from the encoder of the motor 10 (the encoder specifies the number of pulses PPR per revolution as N, and the actual measured number of pulses is n), combined with parameters such as the transmission ratio i of the electric cylinder 80 and the pitch p of the output shaft of the motor 10, and thus obtain the compression amount. This method does not require the installation of additional specialized displacement measurement equipment, has relatively low cost, and the measurement accuracy can meet the needs of most application scenarios.

[0105] The pressurizing device provided above can cool the pressure rod body 3101 by liquid cooling. However, considering that using liquid (such as water) as the cooling medium may cause leakage, resulting in the explosion of the high-temperature furnace.

[0106] Therefore, this application embodiment also provides another pressurizing device, which can use gas to cool the pressure rod body 3101, thus avoiding the possibility of leakage and explosion caused by liquid (such as water) during the cooling process; in addition, the cylinder connected to the motor 10 can use a common air source, thereby reducing the use of water chiller and reducing energy consumption.

[0107] Please see Figure 9 and Figure 10 The pressure rod body 3101 is connected to the heat dissipation structure 3102 in the first direction Y. That is, one end of the heat dissipation structure 3102 in the first direction Y is connected to the motor 10, and the other end is connected to the pressure rod body 3101. Figure 10 The diagram illustrates that the heat dissipation structure 3102 and the pressure rod body 3101 are separate structures. In other embodiments, the heat dissipation structure 3102 and the pressure rod body 3101 can be an integrated structure, which is not particularly limited here.

[0108] The heat dissipation structure 3102 has a second cooling cavity 303 inside, and a plurality of third partition plates 304 are disposed in the second cooling cavity 303 and extend along the second direction X; a plurality of fourth partition plates 305 are disposed in the second cooling cavity 303 and extend along the second direction X; wherein, the third partition plates 304 and the fourth partition plates 305 are arranged in sequence at intervals in the first direction Y to form a fluid-connected second cooling channel 3010.

[0109] The orthographic projection of the third partition plate 304 in the first direction Y partially overlaps with the orthographic projection of the fourth partition plate 305 in the first direction Y, so that the second cooling channel 3010 has multiple second sub-channels 3011 spaced apart in the first direction Y.

[0110] Specifically, each third partition plate 304 is connected to the inner wall of the second cooling chamber 303 in the second direction X, and a portion of the third partition plate 304 has a first gap 306 with the inner wall of the second cooling chamber 303; each fourth partition plate 305 is connected to the inner wall of the second cooling chamber 303 in the second direction X, and a portion of the fourth partition plate 305 has a second gap 307 with the inner wall of the second cooling chamber 303; the first gap 306 and the second gap 307 are disposed away from each other in the second direction X; the third partition plate 304 and the fourth partition plate 305 are arranged sequentially at intervals in the first direction Y to form a fluid-connected second cooling channel 3010.

[0111] The second sub-channel 3011 is formed by the interval between adjacent third partition plates 304 and fourth partition plates 305, or by the interval between the third partition plate 304 and the inner wall of the second cooling chamber 303, or by the interval between the fourth partition plate 305 and the inner wall of the second cooling chamber 303. The first gap 306 and the second gap 307 serve as the connection points between two adjacent second sub-channels 3011, and the first gap 306 and the second gap 307 are positioned far apart from each other in the second direction X. This allows the fluid (e.g., gas) to flow uniformly between the third partition plate 304 and the fourth partition plate 305, increasing the contact area between the fluid and the inner wall of the second cooling chamber 303, thereby improving heat exchange efficiency.

[0112] In some embodiments, please refer to Figure 10 The heat dissipation structure 3102 has a second inlet 308 and a second outlet 309 that are connected to the second cooling channel 3010. The second inlet 308 is located on the side close to the pressure bar body 3101, and the second outlet 309 is located on the side away from the pressure bar body 3101.

[0113] The fluid (e.g., gas) flows into the second cooling channel 3010 from the second inlet 308 and finally flows out from the second outlet 309. During this process, when the fluid flows into the second cooling channel 3010, it can contact the pressure rod body 3101 (heat source) at the first moment to quickly cool the pressure rod body 3101, ensuring that it is kept within a suitable temperature range during operation and reducing performance degradation or damage caused by overheating.

[0114] The pressurizing device described above uses gas to cool the pressure rod body 3101. This device employs a cylinder for pressurization, requiring an external gas supply with a certain pressure (≥0.6MPa), which can share the same gas source. Both the pressure rod body 3101 and the heat dissipation structure 3102 can be made of 430 stainless steel or other stainless steels with higher temperature and corrosion resistance. In the case where the pressure rod body 3101 and the heat dissipation structure 3102 are separate structures, they can be connected by threads. A circulating second cooling channel 3010 is formed inside the heat dissipation structure 3102 through machining, and a gas port (second inlet 308 and second outlet 309) is provided at the top and bottom of the heat dissipation structure 3102 to allow gas to flow within the second cooling channel 3010.

[0115] Figure 9 and Figure 10 The heat dissipation structure 3102 is a one-piece structure. However, to facilitate the fabrication and shaping of the heat dissipation structure 3102, this application embodiment also provides a split-type heat dissipation structure 3102. For example, please refer to... Figure 11 , Figure 12 and Figure 13 The heat dissipation structure 3102 can be composed of at least two heat exchange sections 3016, each heat exchange section 3016 having a sub-cooling cavity 3012, and multiple sub-cooling cavities 3012 forming a second cooling cavity 303.

[0116] Please see Figures 11 to 13 The heat dissipation structure 3102 consists of two heat exchange sections 3016, and the sub-cooling chambers 3012 of the two heat exchange sections 3016 cooperate to form a second cooling chamber 303. Each sub-cooling chamber 3012 of the heat exchange section 3016 is provided with multiple third partition sections 3041 and multiple fourth partition sections 3051. The third partition sections 3041 and fourth partition sections 3051 both extend along the second direction X. The third partition sections 3041 and fourth partition sections 3051 are arranged sequentially at intervals in the first direction Y to form a second sub-flow channel 3011. In this way, after the two heat exchange sections 3016 are combined, the two second sub-flow channels 3011 form a complete second cooling flow channel 3010, the two third partition sections 3041 are connected to form a third partition plate 304, and the two fourth partition sections 3051 are connected to form a fourth partition plate 305.

[0117] In one embodiment, see Figure 13 In any heat exchange section 3016, a portion of each third partition section 3041 has a third gap 3013 with the inner wall of the sub-cooling chamber 3012; a portion of each fourth partition section 3051 has a fourth gap 3014 with the inner wall of the sub-cooling chamber 3012; the third gap 3013 and the fourth gap 3014 are arranged far apart from each other.

[0118] The third gap 3013 and the fourth gap 3014 serve as the connection ports between two adjacent second sub-channels 3011. Furthermore, the third gap 3013 and the fourth gap 3014 are positioned far apart from each other, which allows fluid (e.g., gas) to flow between the third partition plate 304 and the fourth partition plate 305, increasing the contact area between the fluid and the inner wall of the second cooling chamber 303, thereby improving the heat exchange efficiency.

[0119] Please see Figure 12 and Figure 13 The pressurizing device also includes a first fixing cap 3015, and a heat dissipation structure 3102 is connected to the motor 10 through the first fixing cap 3015. It is understood that... (Please refer to...) Figure 5 The first fixing cap 3015 is threadedly connected to the second connecting piece 50, the second connecting piece 50 is connected to the pressure sensor 20 through the fixing piece 60, and the motor 10 is connected to the pressure sensor 20 through the first connecting piece 40.

[0120] In some embodiments, please refer to Figure 12 and Figure 13 The heat dissipation structure 3102 consists of two heat exchange sections 3016. A semi-formed second cooling channel 3010 is formed within each heat exchange section 3016 through machining. Each heat exchange section 3016 has a connecting portion at both ends in the first direction Y. The two heat exchange sections 3016 are combined to form the heat dissipation structure 3102. One end of the heat dissipation structure 3102 in the first direction Y is threadedly connected to the pressure rod body 3101, and the other end is threadedly connected to the first fixing cap 3015, thereby fixing the heat dissipation structure 3102. At this time, gas can be introduced into the second cooling channel 3010 from the second inlet 308 to cool the pressure rod body 3101.

[0121] The pressurization device provided above uses gas for cooling, which can avoid the possibility of leakage and subsequent explosion that may occur when using liquid (water) for cooling. In addition, the cylinders can use a common gas source, reducing the use of water chillers and lowering energy consumption.

[0122] Considering that the above-mentioned pressurizing device uses at least two heat exchange sections 3016 to form a heat dissipation structure 3102, it would increase the manufacturing difficulty and cause air leakage between the two heat exchange sections 3016, resulting in poor sealing performance. Alternatively, as an alternative to the integrated heat dissipation structure 3102, this application embodiment also provides another pressurizing device, please refer to... Figure 14 , Figure 15 and Figure 16 The heat dissipation structure 3102 is located inside the pressure rod body 3101.

[0123] In some embodiments, please refer to Figure 14 , Figure 15 and Figure 16 The heat dissipation structure 3102 has a third cooling chamber 3001 inside; the heat exchange coil 30010 is disposed in the third cooling chamber 3001; the heat conduction structure 3005 conducts heat and fills the third cooling chamber 3001, and wraps the outer periphery of the heat exchange coil 30010; the heat dissipation structure 3102 has a first through hole 3006 and a second through hole 3007, the first through hole 3006 is disposed on the side away from the motor 10, and the second through hole 3007 is disposed on the side close to the motor 10; one end of the heat exchange coil 30010 passes through the first through hole 3006, and the other end passes through the second through hole 3007.

[0124] It is understood that the heat exchange coil 30010 is a double-helix tube, with a third cooling channel 3002 inside, having a third inlet 3003 and a third outlet 3004 that are opposite to each other. The third inlet 3003 is located on the side away from the motor 10, and the third outlet 3004 is located near the motor 10 (see...). Figure 5 On one side of the flow path, fluid (e.g., coolant) flows into the third cooling channel 3002 from the third inlet 3003 and finally flows out from the third outlet 3004. During this process, when the fluid flows into the third inlet 3003, it can immediately contact the pressure rod body 3101 (heat source) to quickly cool the pressure rod body 3101, ensuring that it remains within a suitable temperature range during operation and reducing performance degradation or damage caused by overheating.

[0125] The heat-conducting structure 3005 provides additional support and stability, ensuring that the heat dissipation structure 3102 remains fixed in position within the third cooling chamber 3001, reducing displacement or damage caused by vibration or external forces. Furthermore, the heat-conducting structure 3005 surrounds the outer periphery of the heat exchange coil 30010, promoting heat conduction from the heat exchange coil 30010 to the heat-conducting structure 3005, which helps to evenly distribute heat and improve overall cooling efficiency.

[0126] In some embodiments, the melting point of the thermally conductive structure 3005 is lower than that of the heat exchange coil 30010. The melting of the thermally conductive structure 3005 can help absorb and dissipate excess heat, thereby protecting the heat exchange coil 30010 from overheating.

[0127] The materials used in the heat exchange coil 30010 include, but are not limited to, copper, silver, gold, palladium, platinum, nickel, etc., while the materials used in the heat conduction structure 3005 include, but are not limited to, aluminum, magnesium, zinc, cadmium, indium, etc.

[0128] One end of the heat exchange coil 30010 passes through the first through hole 3006, allowing the end of the heat exchange coil 30010 with the third inlet 3003 to pass through. The other end of the heat exchange coil 30010 passes through the second through hole 3007, allowing the end of the heat exchange coil 30010 with the third outlet 3004 to pass through. This allows the fluid to circulate within the double helix tube, improving heat exchange efficiency.

[0129] In one embodiment, the heat dissipation structure 3102 has an opening 3008 communicating with the third cooling chamber 3001. The pressurizing device also includes a second fixing cap 3009, which is threaded to the opening 3008 to further secure the double helix tube within the third cooling chamber 3001.

[0130] As an alternative to the aforementioned pressurizing device, this application embodiment also provides another pressurizing device, please refer to... Figure 17 The heat dissipation structure 3102 includes multiple spaced heat exchange columns 3112, which increases the heat dissipation area while reducing the heat transfer area, and uses natural airflow for cooling. This solution is simple to manufacture and does not require additional air or water cooling, thus saving energy.

[0131] Please see Figure 17 The pressure rod body 3101 includes a first connecting column 3110 and a second connecting column 3111. Each heat exchange column 3112 is connected between the first connecting column 3110 and the second connecting column 3111 in the first direction Y. The orthogonal projected area of ​​the plurality of heat exchange columns 3112 in a plane perpendicular to the first direction Y is smaller than the orthogonal projected area of ​​the first connecting column 3110 or the second connecting column 3111 in a plane perpendicular to the first direction Y.

[0132] Understandably, the connection of multiple heat exchange columns 3112 between the first connecting column 3110 and the second connecting column 3111 reduces the contact area between the heat exchange columns 3112 of the first connecting column 3110 and the heat exchange columns 3112 of the second connecting column 3111, thereby reducing heat conduction between the connecting columns and increasing the heat dissipation area. Furthermore, while increasing the heat dissipation area, natural wind can be used to cool the pressure rod body 3101.

[0133] Compared to the pressurization devices provided in other embodiments, this pressurization device is simple to manufacture and does not require additional air cooling and water cooling for cooling, thus saving energy.

[0134] Please see Figure 10 , Figure 13 , Figure 14 and Figure 17 The orthographic projection of the heat dissipation structure 3102 on the plane perpendicular to the first direction Y is within the orthographic projection of the pressure rod body 3101 on the plane perpendicular to the first direction Y. This can provide a certain degree of protection for the heat dissipation structure 3102 and reduce the direct impact of the external environment on it, such as collisions, dust or other physical damage.

[0135] In the above embodiments, the heat dissipation structure 3102 and the pressure rod body 3101 can be either an integrated structure or a separate structure. When the heat dissipation structure 3102 and the pressure rod body 3101 are an integrated structure, the pressurizing device reduces the interfaces in the heat conduction path, improves heat conduction efficiency, and helps to dissipate heat more effectively. When the heat dissipation structure 3102 and the pressure rod body 3101 are separate structures, the pressurizing device allows for greater design flexibility, allowing individual components to be replaced or upgraded as needed.

[0136] In the pressurization device of this application embodiment, by introducing a heat dissipation structure 3102 into the pressurization device, the heat generated during the pressurization process is effectively dissipated, avoiding the problem of overheating of the device and improving working efficiency and service life. Furthermore, the pressurization device can monitor in real time the actual compression amount of the fuel cell stack under different pressures during high-temperature operation, as well as the change in the load pressure of the fuel cell stack with temperature changes under the same compression amount.

[0137] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0138] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0139] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0140] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A pressurizing device, characterized in that, The pressurizing device includes: Electric motor; A pressure sensor having a first end and a second end opposite to each other in a first direction, and the motor being connected to the first end of the pressure sensor; A pressure rod assembly has a pressure rod body and a heat dissipation structure. The pressure rod body is connected to the second end of the pressure sensor, and the heat dissipation structure is thermally connected to the pressure rod body. The first direction and the second direction intersect.

2. The pressurizing device according to claim 1, characterized in that, The heat dissipation structure has a first cooling cavity inside; Multiple first partition plates are disposed within the first cooling chamber; as well as Multiple second partition plates are disposed within the first cooling chamber; Each of the first partition plates is connected to the top wall and side wall of the first cooling chamber along the first direction, and each of the second partition plates is connected to the bottom wall and side wall of the first cooling chamber along the first direction. The first partition plates and the second partition plates are arranged at intervals in the second direction to form a first cooling channel with fluid communication.

3. The pressurizing device according to claim 2, characterized in that, The heat dissipation structure has a connecting hole that extends along the first direction. The heat dissipation structure has a first inlet and a first outlet that extend along the second direction, and the first inlet and the first outlet are respectively connected to the first cooling channel.

4. The pressurizing device according to claim 1, characterized in that, The heat dissipation structure has a second cooling chamber inside, and multiple third partition plates are disposed in the second cooling chamber and extend along the second direction; Multiple fourth partition plates are disposed within the second cooling chamber and extend along the second direction; The third partition plate and the fourth partition plate are arranged at intervals in the first direction to form a second cooling channel with fluid communication.

5. The pressurizing device according to claim 4, characterized in that, Each of the third partition plates is connected to the inner wall of the second cooling chamber in the second direction, and a portion of the third partition plate has a first gap with the inner wall of the second cooling chamber; each of the fourth partition plates is connected to the inner wall of the second cooling chamber in the second direction, and a portion of the fourth partition plate has a second gap with the inner wall of the second cooling chamber. The first gap and the second gap are positioned far apart from each other in the second direction; The orthographic projection of the third partition plate in the first direction partially overlaps with the orthographic projection of the fourth partition plate in the first direction.

6. The pressurizing device according to claim 4, characterized in that, The pressure rod body has a second inlet and a second outlet that communicate with the second cooling channel. The second inlet is located on the side closer to the motor, and the second outlet is located on the side farther away from the motor.

7. The pressurizing device according to claim 1, characterized in that, The heat dissipation structure has a third cooling chamber inside. The heat exchange coil is disposed in the third cooling chamber; A thermally conductive structure is provided, which is filled within the third cooling cavity and surrounds the outer periphery of the heat exchange coil. The heat dissipation structure has a first through hole and a second through hole. The first through hole is located on the side away from the motor, and the second through hole is located on the side closer to the motor. One end of the heat dissipation structure passes through the first through hole, and the other end passes through the second through hole.

8. The pressurizing device according to claim 7, characterized in that, The melting point of the heat-conducting structure is lower than that of the heat-dissipating structure.

9. The pressurizing device according to claim 1, characterized in that, The heat dissipation structure includes multiple heat exchange columns arranged at intervals.

10. The pressurizing device according to claim 9, characterized in that, Also includes: The pressure bar body includes a first connecting column and a second connecting column, and each heat exchange column is connected between the first connecting column and the second connecting column in the first direction; The projected area of ​​the plurality of heat exchange columns on a plane perpendicular to the first direction is smaller than the projected area of ​​the first connecting column or the second connecting column on a plane perpendicular to the first direction.

11. The pressurizing device according to claim 1, characterized in that, Also includes: A first connector is connected between the motor and the pressure sensor in the first direction; The second connector is connected between the pressure rod body and the pressure sensor in the first direction.

12. The pressurizing device according to any one of claims 1-11, characterized in that, The heat dissipation structure and the pressure rod body can be an integrated structure or separate structures.

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