A new thin film capacitor housing

Abstract

The utility model belongs to the technical field of film capacitor shell, concretely relates to a novel film capacitor shell, this novel film capacitor shell, including bottom plate, the upper surface fixed connection of bottom plate has the first rectangle cylinder, the upper surface fixed connection of first rectangle cylinder has support plate, the upper surface fixed connection of support plate has the second rectangle cylinder. This novel film capacitor shell passes through bottom plate, first rectangle cylinder, support plate, second rectangle cylinder, apron, air inlet, third rectangle cylinder, first mounting panel, heat dissipation fan, air outlet, first round hole, second round hole and the cooperation of connecting pipe, makes heat dissipation fan after starting, can significantly accelerate the air flow rate in second rectangle cylinder, in this process, the heat of film capacitor in second rectangle cylinder can be blown away fast when working, and then effectively reduce the temperature of film capacitor in this shell, thereby guarantee the normal work and service life of film capacitor.

Description

Technical Field

[0001] This utility model belongs to the technical field of thin-film capacitor housing, and specifically relates to a novel thin-film capacitor housing. Background Technology

[0002] Film capacitors are cylindrical capacitors that use metal foil as electrodes, overlapped at both ends with plastic films such as polyethylene, polypropylene, polystyrene, or polycarbonate. Film capacitors are key components in the drive circuits of electric vehicles, primarily serving a smoothing function.

[0003] Currently, most film capacitor housings on the market have ventilation holes on their surface to allow heat to escape from the inside of the housing. For example, a film capacitor housing for new energy vehicles disclosed in Chinese Patent Publication No. CN219642672U.

[0004] However, this heat dissipation method, which relies solely on natural air convection, has significant drawbacks: when film capacitors operate under high power conditions, the heat generation rate of internal components increases dramatically, while the natural convection heat transfer coefficient is relatively low (typically only 5–25 W / (m²·K)). This directly results in heat being difficult to dissipate quickly through the vents, leading to a continuous rise in the core temperature of the film capacitor. When the temperature exceeds the rated operating temperature (e.g., 85°C), it accelerates the aging of the film capacitor dielectric, significantly affecting its operational stability and service life.

[0005] Furthermore, the cover plates of existing housings are typically fixed to the housing body with multiple bolts. This fixing method has significant shortcomings in actual maintenance: on the one hand, the number of bolts is large (commonly 4-8), requiring repeated tightening during disassembly and assembly, making the operation cumbersome; on the other hand, bolted connections require special tools (such as screwdrivers and wrenches), and are prone to problems such as stripped threads and bolt corrosion, resulting in time-consuming and labor-intensive maintenance, especially in the vehicle environment where frequent inspections are required, greatly reducing after-sales maintenance efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a novel thin-film capacitor housing that solves the problems of low heat dissipation efficiency and cumbersome disassembly and assembly of the cover plate in existing thin-film capacitor housings.

[0007] The specific technical solution adopted by this utility model is as follows:

[0008] A novel thin-film capacitor housing includes a base plate. A first rectangular tube is fixedly connected to the upper surface of the base plate. A support plate is fixedly connected to the upper surface of the first rectangular tube. A second rectangular tube is fixedly connected to the upper surface of the support plate. A cover plate is fitted onto the upper surface of the second rectangular tube. An air inlet is provided inside the cover plate. A third rectangular tube is fixedly connected to the front of the second rectangular tube. A first mounting plate is fixedly connected to the front of the third rectangular tube. A cooling fan is fixedly connected to the front of the first mounting plate. An air outlet is provided inside the first mounting plate. A first circular hole is provided at the bottom of the third rectangular tube. A second circular hole is provided at the front of the first rectangular tube. Connecting pipes are fixedly connected to the inner walls of the hole and the second circular hole. Ventilation holes are opened inside the support plate. First partition plates are fixedly connected to the left and right sides of the inner wall of the second rectangular tube and the upper surface of the support plate. Second partition plates are fixedly connected to the front and rear sides of the first partition plate, the front and rear sides of the inner wall of the second rectangular tube, and the upper surface of the support plate. A square tube is fixedly connected to the bottom of the support plate. A sealing plate is fitted to the inner wall of the square tube. A first spring is fixedly connected to the bottom of the sealing plate and the upper surface of the bottom plate. A conical hole is opened inside the sealing plate. A conical block is fitted to the inner wall of the conical hole. The upper surface of the conical block is fixedly connected to the bottom of the support plate.

[0009] The present invention is further configured such that a second mounting plate is fixedly connected to the upper surface of the support plate, and the second mounting plate is located directly above the conical block.

[0010] The present invention is further configured such that a U-shaped plate is fixedly connected to the right side of the second rectangular tube, a rectangular hole is opened inside the cover plate, and a T-shaped clamping plate is fitted to the inner wall of the rectangular hole, the inner wall of the U-shaped plate, and the right side of the second rectangular tube. A second spring is fixedly connected to the bottom of the T-shaped clamping plate and the upper surface of the support plate. Rectangular plates are fixedly connected to the front and rear sides of the second rectangular tube. A trapezoidal groove is opened on the upper surface of the rectangular plate, and a trapezoidal block is fitted to the inner wall of the trapezoidal groove and the front and rear sides of the second rectangular tube. The upper surface of the trapezoidal block is fixedly connected to the bottom of the cover plate.

[0011] The present invention is further configured such that the left side of both the trapezoidal block and the trapezoidal groove are inclined surfaces, the right side of both the trapezoidal block and the trapezoidal groove are vertical surfaces, and the length of the bottom surface of the trapezoidal block is less than the length of the bottom surface of the trapezoidal groove.

[0012] The present invention is further configured such that the conical block is disposed in the middle of the sealing plate, and the top diameter of the conical block is larger than its bottom diameter.

[0013] The present invention is further configured such that the gap between the bottom surface of the square tube and the upper surface of the base plate is 10mm.

[0014] The technical effects achieved by this utility model are as follows:

[0015] This utility model discloses a novel thin-film capacitor housing. Through the cooperation of a base plate, a first rectangular cylinder, a support plate, a second rectangular cylinder, a cover plate, an air inlet, a third rectangular cylinder, a first mounting plate, a cooling fan, an air outlet, a first round hole, a second round hole, and a connecting pipe, the cooling fan can significantly accelerate the airflow rate inside the second rectangular cylinder after startup. During this process, the heat generated by the thin-film capacitors inside the second rectangular cylinder during operation can be quickly dissipated, thereby effectively reducing the temperature of the thin-film capacitors inside the housing, thus ensuring the normal operation and service life of the thin-film capacitors. At the same time, through the cooperation of the first and second partition plates, multiple thin-film capacitors inside the housing are separated, and through the cooperation of the rectangular cylinder, sealing plate, first spring, conical hole, and conical block, the airflow rate around each thin-film capacitor is made equal, so that all the thin-film capacitors inside the housing can be fully dissipated.

[0016] This utility model discloses a novel thin-film capacitor housing. Through the cooperation of a cover plate, a U-shaped plate, a rectangular hole, a T-shaped clamping plate, a second spring, a rectangular plate, a trapezoidal groove, and a trapezoidal block, the user only needs to move the T-shaped clamping plate to complete the disassembly and assembly of the cover plate, thus making the disassembly and assembly process of the cover plate simpler and making it more convenient for the user to repair the thin-film capacitor inside the housing. Attached Figure Description

[0017] Figure 1 This is a front view of the structure of this utility model;

[0018] Figure 2 yes Figure 1 Sectional view at point AA;

[0019] Figure 3 yes Figure 2 Sectional view at point BB;

[0020] Figure 4 This is a front view of the first rectangular tube in this utility model;

[0021] Figure 5 This is a top view of the support plate in this utility model;

[0022] Figure 6 This is a bottom view of the support plate in this utility model;

[0023] Figure 7 This is a front view of the second rectangular tube in this utility model;

[0024] Figure 8 This is a top view of the cover plate in this utility model;

[0025] Figure 9 This is a bottom view of the third rectangular tube in this utility model;

[0026] Figure 10 This is a front view of the first mounting plate in this utility model;

[0027] Figure 11 This is a top view of the sealing plate in this utility model;

[0028] Figure 12 yes Figure 11 Sectional view at CC;

[0029] Figure 13 This is a front view of the rectangular plate in this utility model.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Base plate; 2. First rectangular tube; 3. Support plate; 4. Second rectangular tube; 5. Cover plate; 6. Air inlet; 7. Third rectangular tube; 8. First mounting plate; 9. Cooling fan; 10. Air outlet; 11. First round hole; 12. Second round hole; 13. Connecting pipe; 14. Vent hole; 15. First partition plate; 16. Second partition plate; 17. Square tube; 18. Sealing plate; 19. First spring; 20. Conical hole; 21. Conical block; 22. Second mounting plate; 23. U-shaped plate; 24. Rectangular hole; 25. T-shaped clamping plate; 26. Second spring; 27. Rectangular plate; 28. Trapezoidal groove; 29. ​​Trapezoidal block. Detailed Implementation

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] like Figures 1 to 12As shown, a novel thin-film capacitor housing includes a base plate 1. A first rectangular tube 2 is fixedly connected to the upper surface of the base plate 1. A support plate 3 is fixedly connected to the upper surface of the first rectangular tube 2. A second rectangular tube 4 is fixedly connected to the upper surface of the support plate 3. A cover plate 5 is fitted onto the upper surface of the second rectangular tube 4. An air inlet 6 is provided inside the cover plate 5. A third rectangular tube 7 is fixedly connected to the front of the second rectangular tube 4. A first mounting plate 8 is fixedly connected to the front of the third rectangular tube 7. A cooling fan 9 is fixedly connected to the front of the first mounting plate 8. An air outlet 10 is provided inside the first mounting plate 8. A first circular hole 11 is provided at the bottom of the third rectangular tube 7. A second circular hole 12 is provided on the front of the first rectangular tube 7. The inner wall of the first circular hole 11 and the second circular hole 12 are connected together. Connecting pipes 13 are fixedly connected to the inner wall of hole 12. Ventilation holes 14 are opened inside the support plate 3. First partition plates 15 are fixedly connected to the left and right sides of the inner wall of the second rectangular tube 4 and the upper surface of the support plate 3. Second partition plates 16 are fixedly connected to the front and rear sides of the first partition plate 15, the front and rear sides of the inner wall of the second rectangular tube 4 and the upper surface of the support plate 3. A square tube 17 is fixedly connected to the bottom of the support plate 3. A sealing plate 18 is fitted to the inner wall of the square tube 17. A first spring 19 is fixedly connected to the bottom of the sealing plate 18 and the upper surface of the bottom plate 1. A conical hole 20 is opened inside the sealing plate 18. A conical block 21 is fitted to the inner wall of the conical hole 20. The upper surface of the conical block 21 is fixedly connected to the bottom of the support plate 3.

[0035] The upper surface of the support plate 3 is fixedly connected to the second mounting plate 22, which is located directly above the conical block 21. The conical block 21 is located in the middle of the sealing plate 18, and the top diameter of the conical block 21 is larger than its bottom diameter. The gap between the bottom surface of the square tube 17 and the upper surface of the base plate 1 is 10mm.

[0036] It should be noted that when the cooling fan 9 is turned on, the air outside the second rectangular cylinder 4 enters the second rectangular cylinder 4 through the air inlet 6, the air inside the second rectangular cylinder 4 enters the first rectangular cylinder 2 through the vent 14, the air inside the first rectangular cylinder 2 enters the third rectangular cylinder 7 through the connecting pipe 13, and the air inside the third rectangular cylinder 7 is discharged through the air outlet 10. At this time, by starting the cooling fan 9, the air flow rate inside the second rectangular cylinder 4 can be significantly accelerated, and the heat generated by the film capacitor inside the second rectangular cylinder 4 during operation can be quickly dissipated.

[0037] The first partition plate 15 and the second partition plate 16 work together to separate the multiple thin-film capacitors inside the housing. The first spring 19 makes the conical hole 20 and the conical block 21 fit tightly together, and the conical block 21 seals the conical hole 20. When the cooling fan 9 is started, the cooling fan 9 creates an air pressure difference between the top and bottom of the sealing plate 18. Since the multiple square cylinders 17 are interconnected, the air pressure difference inside the multiple square cylinders 17 is equal. When the air pressure difference between the top and bottom of the sealing plate 18 is greater than the elastic force of the first spring 19, the atmospheric pressure separates the conical hole 20 from the conical block 21 and makes the air flow rate around each thin-film capacitor equal, so that the multiple thin-film capacitors inside the housing can dissipate heat fully. The upward pushing force of the four first springs 19 below the sealing plate 18 on the sealing plate 18 is 15 times the weight of the sealing plate 18. Through the elastic force of the first spring 19 and the friction between the sealing plate 18 and the square cylinders 17, the sealing plate 18 does not vibrate or bounce when the housing vibrates.

[0038] like Figures 1 to 13 As shown, a U-shaped plate 23 is fixedly connected to the right side of the second rectangular tube 4. A rectangular hole 24 is opened inside the cover plate 5. A T-shaped clamping plate 25 is attached to the inner wall of the rectangular hole 24, the inner wall of the U-shaped plate 23, and the right side of the second rectangular tube 4. A second spring 26 is fixedly connected to the bottom of the T-shaped clamping plate 25 and the upper surface of the support plate 3. A rectangular plate 27 is fixedly connected to both the front and rear sides of the second rectangular tube 4. A trapezoidal groove 28 is opened on the upper surface of the rectangular plate 27. A trapezoidal block 29 is attached to the inner wall of the trapezoidal groove 28 and the front and rear sides of the second rectangular tube 4. The upper surface of the trapezoidal block 29 is fixedly connected to the bottom of the cover plate 5.

[0039] In this design, the left sides of both trapezoidal block 29 and trapezoidal groove 28 are inclined surfaces, and the right sides of both trapezoidal block 29 and trapezoidal groove 28 are vertical surfaces. The length of the bottom surface of trapezoidal block 29 is less than the length of the bottom surface of trapezoidal groove 28.

[0040] It should be noted that when the trapezoidal block 29 and the trapezoidal groove 28 are tightly fitted, the cover plate 5 can only move left and right on the second rectangular cylinder 4 due to the cooperation between the trapezoidal block 29 and the trapezoidal groove 28. When the T-shaped clamping plate 25 is inserted into the rectangular hole 24, the cover plate 5 cannot move left and right due to the cooperation between the T-shaped clamping plate 25 and the rectangular hole 24. Furthermore, the elastic force of the second spring 26 prevents the T-shaped clamping plate 25 from automatically separating from the rectangular hole 24. At this time, the cover plate 5 can be fixed on the second rectangular cylinder 4 by the cooperation of the trapezoidal groove 28, the trapezoidal block 29, the rectangular hole 24, and the T-shaped clamping plate 25. After the T-shaped clamping plate 25 separates from the rectangular hole 24, the cover plate 5 can be fixed on the second rectangular cylinder 4 by moving the trapezoidal block 29 out of the trapezoidal groove 28. The cover plate 5 can be removed from the second rectangular tube 4, making the disassembly and assembly of the cover plate 5 easier and making it more convenient for users to repair the film capacitor inside the housing. When the left inclined surface of the trapezoidal block 29 contacts the left inclined surface of the trapezoidal groove 28, and the T-shaped clamping plate 25 is inserted into the rectangular hole 24, the cover plate 5 cannot move upward through the cooperation of the trapezoidal block 29 and the trapezoidal groove 28. When the right vertical surface of the trapezoidal block 29 contacts the right vertical surface of the trapezoidal groove 28, the trapezoidal block 29 can be directly moved out of the trapezoidal groove 28. The elastic force of the second spring 26 is 15 times the weight of the T-shaped clamping plate 25, ensuring that the T-shaped clamping plate 25 has no risk of falling off when the housing vibrates.

[0041] The working principle of this utility model is as follows: First, by pressing the T-shaped card plate 25, the T-shaped card plate 25 is moved out of the rectangular hole 24. Then, by moving the trapezoidal block 29 out of the trapezoidal groove 28, the cover plate 5 can be removed from the second rectangular cylinder 4. Then, the film capacitor is fixed on the second mounting plate 22, and the cover plate 5 is placed on the second rectangular cylinder 4. Then, the trapezoidal block 29 is inserted into the trapezoidal groove 28, and the T-shaped card plate 25 is inserted into the rectangular hole 24. At this time, the elastic force of the second spring 26 prevents the T-shaped card plate 25 from automatically separating from the rectangular hole 24. Through the cooperation of the trapezoidal groove 28, the trapezoidal block 29, the rectangular hole 24, and the T-shaped card plate 25, the cover plate 5 can be fixed on the second rectangular cylinder 4.

[0042] When the cooling fan 9 is started, it creates an air pressure difference between the top and bottom of the sealing plate 18. Since the multiple square cylinders 17 are interconnected, the air pressure difference within each of the multiple square cylinders 17 is equal. When the air pressure difference between the top and bottom of the sealing plate 18 is greater than the elastic force of the first spring 19, atmospheric pressure causes the conical hole 20 to separate from the conical block 21. After the conical hole 20 separates from the conical block 21, the cooling fan 9 significantly accelerates the airflow rate around the film capacitor. At this time, the heat generated by the film capacitor during operation can be quickly dissipated. At the same time, since the airflow rate around each film capacitor is equal, the multiple film capacitors in the housing can be fully cooled.

[0043] When it is necessary to repair the film capacitor, first press the T-shaped plate 25 to remove it from the rectangular hole 24, and then remove the cover plate 5 from the second rectangular cylinder 4 by removing the trapezoidal block 29 from the trapezoidal groove 28.

[0044] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A novel thin film capacitor housing characterized by: The system includes a base plate (1), a first rectangular tube (2) fixedly connected to the upper surface of the base plate (1), a support plate (3) fixedly connected to the upper surface of the first rectangular tube (2), a second rectangular tube (4) fixedly connected to the upper surface of the support plate (3), a cover plate (5) fitted onto the upper surface of the second rectangular tube (4), an air inlet (6) provided inside the cover plate (5), a third rectangular tube (7) fixedly connected to the front of the second rectangular tube (4), a first mounting plate (8) fixedly connected to the front of the third rectangular tube (7), a cooling fan (9) fixedly connected to the front of the first mounting plate (8), an air outlet (10) provided inside the first mounting plate (8), a first circular hole (11) provided at the bottom of the third rectangular tube (7), a second circular hole (12) provided on the front of the first rectangular tube (2), and the inner wall of the first circular hole (11) and the second circular hole (12) are connected together. The inner walls of the support plate (3) are fixedly connected with connecting pipes (13). The support plate (3) has ventilation holes (14). The left and right sides of the inner wall of the second rectangular tube (4) and the upper surface of the support plate (3) are fixedly connected with first partition plates (15). The front and rear sides of the first partition plates (15), the front and rear sides of the inner wall of the second rectangular tube (4) and the upper surface of the support plate (3) are fixedly connected with second partition plates (16). The bottom of the support plate (3) is fixedly connected with a square tube (17). The inner wall of the square tube (17) is fitted with a sealing plate (18). The bottom of the sealing plate (18) and the upper surface of the bottom plate (1) are fixedly connected with first springs (19). The inside of the sealing plate (18) is provided with a conical hole (20). The inner wall of the conical hole (20) is fitted with a conical block (21). The upper surface of the conical block (21) is fixedly connected to the bottom of the support plate (3).

2. A novel thin film capacitor housing according to claim 1, characterized in that: The upper surface of the support plate (3) is fixedly connected to a second mounting plate (22), which is located directly above the conical block (21).

3. A novel thin film capacitor housing according to claim 1, wherein: A U-shaped plate (23) is fixedly connected to the right side of the second rectangular tube (4). A rectangular hole (24) is opened inside the cover plate (5). A T-shaped clamping plate (25) is attached to the inner wall of the rectangular hole (24), the inner wall of the U-shaped plate (23), and the right side of the second rectangular tube (4). A second spring (26) is fixedly connected to the bottom of the T-shaped clamping plate (25) and the upper surface of the support plate (3). A rectangular plate (27) is fixedly connected to both the front and rear sides of the second rectangular tube (4). A trapezoidal groove (28) is opened on the upper surface of the rectangular plate (27). A trapezoidal block (29) is attached to the inner wall of the trapezoidal groove (28) and the front and rear sides of the second rectangular tube (4). The upper surface of the trapezoidal block (29) is fixedly connected to the bottom of the cover plate (5).

4. A novel thin-film capacitor housing according to claim 3, characterized in that: The left side of both the trapezoidal block (29) and the trapezoidal groove (28) is an inclined plane, and the right side of both the trapezoidal block (29) and the trapezoidal groove (28) is a vertical plane. The length of the bottom surface of the trapezoidal block (29) is less than the length of the bottom surface of the trapezoidal groove (28).

5. A novel thin-film capacitor housing according to claim 1, characterized in that: The conical block (21) is located in the middle of the sealing plate (18), and the top diameter of the conical block (21) is larger than its bottom diameter.

6. A novel thin-film capacitor housing according to claim 1, characterized in that: The gap between the bottom surface of the square tube (17) and the upper surface of the base plate (1) is 10 mm.

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