High shock resistant metallized film capacitor

Abstract

The application provides a high anti-vibration metalized film capacitor, relates to the field of film capacitors, and comprises a capacitor shell, a capacitor core, a top limiting piece, an exhaust passage, a one-way exhaust cylinder, a sealed bottom cover, a capacitor pin, a shock absorption protection assembly and a one-way exhaust assembly; the capacitor core is placed on the inner side of the capacitor shell; the top limiting piece is fixedly connected to the upper part of the inner side of the capacitor shell; the exhaust passage is arranged on the upper part of the capacitor shell; the one-way exhaust cylinder is fixedly connected to the upper part of the capacitor shell; the sealed bottom cover is fixedly connected to the lower part of the inner side of the capacitor shell through bolts; the capacitor pin is slidably connected to the lower part of the inner side of the sealed bottom cover; the shock absorption protection assembly is connected with the capacitor shell; and the one-way exhaust assembly is arranged in the one-way exhaust cylinder, thereby prolonging the service life of the whole capacitor and solving the problem that the shell is slightly bulged due to the continuous accumulation of internal gas with the long-term operation of the capacitor.

Description

Technical Field

[0001] This invention relates to the field of thin-film capacitor technology, and in particular to a highly shock-resistant metallized thin-film capacitor. Background Technology

[0002] Metallized film capacitors are widely used in complex and high-vibration electrical systems such as rail transit, new energy vehicles, wind power converters, and industrial frequency conversion equipment due to their excellent self-healing properties, low loss, and good insulation performance. Metallized film capacitors rely on the metallization layer deposited on the surface of the film as electrodes. When a local breakdown of the dielectric occurs, the electric arc generated at the breakdown point will cause the surrounding metallization layer to vaporize instantly, thereby isolating the fault point and completing the self-healing action.

[0003] The present invention, with publication number CN111508708A, relates to the field of power capacitor technology and provides a metallized film capacitor. It aims to solve the problem of rapid temperature rise during operation of metallized film capacitors, where the capacitor can no longer withstand the heat generated by current when a certain temperature is reached, resulting in a shortened lifespan. The invention includes a shell with an opening at the top. Mounting steps are integrally formed on the inner walls of both sides of the shell, and cover plates are mounted on the mounting steps via fastening bolts. A heat dissipation mechanism and an insulating plate are horizontally arranged from bottom to top within the inner cavity of the shell. Two metallized film rolls are vertically and symmetrically arranged at the upper end of the insulating plate, with electrodes covering the upper part of the metallized film rolls. The upper ends of the electrodes extend from the metallized film rolls, penetrate the cover plate, and extend to the upper part of the outer cavity of the shell. The heat dissipation mechanism includes a heat dissipation plate mounted on the bottom wall of the shell. This invention is particularly suitable for long-term use of metallized film capacitors at room temperature and has high social value and application prospects.

[0004] However, during the self-healing process, the high temperature of the electric arc causes the thin film material and metal layer to decompose, continuously generating trace amounts of flammable and inert mixed gases. In conventional metallized thin film capacitors, the entire wound core is tightly wrapped by the potting material. The gas generated by self-healing can only accumulate disorderly between the core layers and in the potting gaps. As the capacitor operates for a long time, the internal gas accumulates continuously, gradually increasing the internal gas pressure of the shell, causing the shell to bulge slightly, damaging the assembly precision of the internal structure, aggravating the misalignment and friction between the thin film layers, and reducing the product's shock resistance and service life. Summary of the Invention

[0005] In view of this, the present invention provides a high-vibration-resistant metallized film capacitor, which comprehensively improves the reliability and service life of the metallized film capacitor by integrating shock absorption protection and a one-way venting assembly. The shock absorption protection assembly achieves axial flexible buffering and radial precise positioning of the core, adjustable auxiliary support to disperse vibration loads, helical stress release component to absorb triaxial vibration and prevent solder joint breakage, spherical elastic contacts to ensure stable electrical connection, and integrates an efficient heat dissipation structure to reduce the operating temperature of the core. The one-way venting assembly adopts a spring-preloaded conical seal, which can automatically and directionally discharge self-healing gas to avoid shell bulging and explosion-proof valve malfunction. After venting, it automatically resets the seal to block the intrusion of external harmful media, protect the internal insulation and metallization layer, significantly improve the long-term operational stability of the product in harsh environments, and extend the service life of the entire capacitor.

[0006] This invention provides a highly shock-resistant metallized film capacitor, specifically comprising a capacitor housing, a capacitor core, a top limiting member, an exhaust channel, a one-way exhaust pipe, a sealed bottom cover, capacitor leads, a shock-absorbing and protective assembly, and a one-way exhaust assembly. The capacitor core is placed inside the capacitor housing. The top limiting member is fixedly connected to the upper interior of the capacitor housing. The exhaust channel is located on the upper part of the capacitor housing. The one-way exhaust pipe is fixedly connected to the upper part of the capacitor housing and communicates with the exhaust channel. The sealed bottom cover is fixedly connected to the lower interior of the capacitor housing by bolts. The capacitor leads are slidably connected to the lower interior of the sealed bottom cover. The shock-absorbing and protective assembly is connected to the capacitor housing. The one-way exhaust assembly is disposed inside the one-way exhaust pipe.

[0007] Furthermore, the shock absorption and protection component includes: auxiliary support slide rails and auxiliary support members; two sets of auxiliary support slide rails are provided, and the two sets of auxiliary support slide rails are integrally formed on the left and right sides of the capacitor housing; two sets of auxiliary support members are provided, and the two sets of auxiliary support members are slidably connected to the outside of the auxiliary support slide rails.

[0008] Furthermore, the shock absorption and protection assembly also includes: a support compression screw; the support compression screw is provided in two sets, the two sets of support compression screws are respectively rotatably connected to the lower part of the auxiliary support slide rail, and the two sets of support compression screws are respectively threadedly connected to the auxiliary support component.

[0009] Furthermore, the shock absorption and protection assembly also includes a stress relief component; the stress relief component is a curved spiral structure and is fixedly connected to the middle position of the capacitor pin.

[0010] Furthermore, the shock absorption and protection assembly also includes: a mounting limiting platform, a connecting contact point, and a connecting contact spring; the mounting limiting platform is fixedly connected to the upper end of the capacitor pin; the connecting contact point is a spherical contact structure, and the connecting contact point is slidably connected above the capacitor pin; the connecting contact spring is fixedly connected below the connecting contact point, and the lower end of the connecting contact spring is fixedly connected to the mounting limiting platform.

[0011] Furthermore, the shock absorption and protection assembly also includes: a mounting extrusion screw, an extrusion nut, an extrusion drive component, and an extrusion rod transmission rod; the mounting extrusion screw is rotatably connected to the lower middle position of the sealing bottom cover; the extrusion nut is threadedly connected to the outside of the mounting extrusion screw; the extrusion drive component is rotatably connected above the extrusion nut; two sets of extrusion rod transmission rods are provided, and the outer sides of the two sets of extrusion rod transmission rods are respectively hinged with a locking block structure, the inner sides of the two sets of extrusion rod transmission rods are respectively hinged to the extrusion drive component, and the locking block structures of the two sets of extrusion rod transmission rods are respectively in contact with the capacitor pins.

[0012] Furthermore, the shock absorption and protection assembly also includes: a shock-resistant contact component and a mounting limit post; the shock-resistant contact component is fixedly connected to the inner side of the capacitor housing, the shock-resistant contact component is a high-temperature resistant silicone pad structure, and the inner side of the shock-resistant contact component contacts the top limit component; the mounting limit post is fixedly connected to the inner side of the capacitor housing.

[0013] Furthermore, the shock absorption and protection assembly also includes a heat sink; the finned end of the heat sink is disposed inside the capacitor housing, and the heat dissipation end of the heat sink is fixedly connected to the outside of the capacitor housing.

[0014] Furthermore, the one-way exhaust assembly includes: an exhaust fixing plate, an exhaust guide rod, and a one-way exhaust plug; the exhaust fixing plate is fixedly connected above the one-way exhaust cylinder, and the exhaust fixing plate has a plurality of exhaust hole structures; the exhaust guide rod is fixedly connected to the lower end of the exhaust fixing plate; the one-way exhaust plug is slidably connected to the outside of the exhaust guide rod, and the one-way exhaust plug is a conical rubber plug structure.

[0015] Furthermore, the one-way exhaust assembly also includes: a one-way limiting spring and an exhaust limiting platform; the upper end of the one-way limiting spring is fixedly connected to the exhaust fixing plate, and the lower end of the one-way limiting spring is fixedly connected to the one-way exhaust plug; the exhaust limiting platform is fixedly connected to the lower inner side of the one-way exhaust cylinder, and the exhaust limiting platform is in contact with the one-way exhaust plug. Beneficial effects

[0016] This invention utilizes a shock-absorbing and protective component. A top limiting component, in conjunction with a high-temperature resistant silicone shock-absorbing contact, provides axial flexible buffering for the capacitor core, effectively absorbing axial vibration energy and preventing rigid collisions. Combined with precise radial positioning of the mounting limit post, it completely prevents core misalignment during long-term vibration. An adjustable auxiliary support component, driven by a support compression screw, slides along an auxiliary support rail, flexibly adapting to different installation gaps and forming additional support points to distribute vibration loads. A curved spiral stress-relieving component simultaneously absorbs axial, radial, and torsional vibration stresses, preventing fatigue fracture of circuit board solder joints at the source. A spherical contact point, in conjunction with a connecting contact spring, achieves an adaptive elastic electrical connection, compensating for core vibration displacement in real time and preventing electrical connection interruptions. The compression screw and other components allow for precise adjustment of pin fixing force, ensuring moderate contact pressure. A heat sink maintains close contact with the core side, significantly improving heat dissipation efficiency, reducing core operating temperature, and significantly extending the product's service life in high-vibration environments.

[0017] This invention, through the setting of a one-way exhaust component and a spring-preloaded conical sealing structure, achieves automatic directional discharge of self-healing gas and reliable reverse isolation from external media. It fundamentally solves the industry pain point of disordered gas accumulation inside metallized film capacitors. It can automatically open the exhaust channel when the internal pressure reaches a set threshold, and promptly discharge the gas generated during the self-healing process. This effectively avoids problems such as shell bulging, internal structural deformation, and premature malfunction of the explosion-proof valve caused by long-term gas accumulation. It also prevents electrical performance degradation and safety hazards caused by pressure rise. At the same time, after exhausting, it can automatically reset the seal, strictly preventing external humid air, dust, and corrosive gases from entering the capacitor, protecting the metallization layer and dielectric film from corrosion, and avoiding a decrease in insulation resistance and capacity decay. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the auxiliary support structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the heat sink structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the stress relief component structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the installation extrusion screw structure of the present invention.

[0025] Figure 6 This is a schematic diagram of the contact point structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the anti-seismic contact component structure of the present invention.

[0027] Figure 8 This is a schematic diagram of the one-way exhaust plug structure of the present invention.

[0028] List of reference numerals 1. Capacitor housing; 101. Auxiliary support slide rail; 102. Auxiliary support component; 103. Support extrusion screw; 104. Stress relief component; 105. Mounting limit platform; 106. Connecting contact point; 107. Connecting contact spring; 108. Mounting extrusion screw; 109. Extrusion nut; 110. Extrusion drive component; 111. Extrusion rod transmission rod; 112. Anti-vibration contact component; 113. Mounting limit post; 114. Heat sink; 2. Capacitor core; 3. Top limit component; 4. Exhaust channel; 5. One-way exhaust pipe; 501. Exhaust fixing plate; 502. Exhaust guide rod; 503. One-way exhaust plug; 504. One-way limit spring; 505. Exhaust limit platform; 6. Sealing bottom cover; 7. Capacitor pins. Detailed Implementation Example 1

[0029] Please refer to Figures 1 to 7 As shown: This invention provides a high shock-resistant metallized film capacitor, comprising a capacitor housing 1, a capacitor core 2, a top limiting member 3, an exhaust channel 4, a one-way exhaust pipe 5, a sealing bottom cover 6, capacitor leads 7, and a shock-absorbing and protective assembly; the capacitor core 2 is placed inside the capacitor housing 1; the top limiting member 3 is fixedly connected to the upper part of the inside of the capacitor housing 1; the exhaust channel 4 is opened on the upper part of the capacitor housing 1; the one-way exhaust pipe 5 is fixedly connected to the upper part of the capacitor housing 1 and communicates with the exhaust channel 4; the sealing bottom cover 6 is fixedly connected to the lower part of the inner side of the capacitor housing 1 by bolts; the capacitor leads 7 are slidably connected to the lower part of the inner side of the sealing bottom cover 6; and the shock-absorbing and protective assembly is connected to the capacitor housing 1.

[0030] The shock absorption and protection components include: auxiliary support slide rail 101 and auxiliary support member 102; two sets of auxiliary support slide rail 101 are provided, and the two sets of auxiliary support slide rail 101 are integrally formed on the left and right sides of the capacitor housing 1; two sets of auxiliary support member 102 are provided, and the two sets of auxiliary support member 102 are slidably connected to the outside of the auxiliary support slide rail 101.

[0031] The shock absorption and protection component also includes: a support compression screw 103; two sets of support compression screws 103 are provided, and the two sets of support compression screws 103 are rotatably connected to the bottom of the auxiliary support slide rail 101, and the two sets of support compression screws 103 are threadedly connected to the auxiliary support component 102.

[0032] The shock absorption and protection component also includes a stress relief component 104; the stress relief component 104 is a curved spiral structure and is fixedly connected to the middle position of the capacitor pin 7.

[0033] The shock absorption and protection assembly also includes: a mounting limit platform 105, a connecting contact point 106, and a connecting contact spring 107; the mounting limit platform 105 is fixedly connected to the upper end of the capacitor pin 7; the connecting contact point 106 is a spherical contact structure, and the connecting contact point 106 is slidably connected above the capacitor pin 7; the connecting contact spring 107 is fixedly connected to the lower end of the connecting contact point 106, and the lower end of the connecting contact spring 107 is fixedly connected to the mounting limit platform 105.

[0034] The shock absorption and protection assembly also includes: a mounting extrusion screw 108, an extrusion nut 109, an extrusion drive component 110, and an extrusion rod transmission rod 111; the mounting extrusion screw 108 is rotatably connected to the lower middle position of the sealing bottom cover 6; the extrusion nut 109 is threadedly connected to the outside of the mounting extrusion screw 108; the extrusion drive component 110 is rotatably connected above the extrusion nut 109; two sets of extrusion rod transmission rods 111 are provided, and the outer sides of the two sets of extrusion rod transmission rods 111 are respectively hinged with a locking block structure, and the inner sides of the two sets of extrusion rod transmission rods 111 are respectively hinged to the extrusion drive component 110, and the locking block structures of the two sets of extrusion rod transmission rods 111 are respectively in contact with the capacitor pin 7.

[0035] The shock absorption and protection component also includes: a shock-resistant contact 112 and a mounting limit post 113; the shock-resistant contact 112 is fixedly connected to the inner side of the capacitor housing 1, the shock-resistant contact 112 is a high-temperature resistant silicone pad structure, and the inner side of the shock-resistant contact 112 is in contact with the top limit post 3; the mounting limit post 113 is fixedly connected to the inner side of the capacitor housing 1.

[0036] The shock absorption and protection assembly also includes a heat sink 114; the finned end of the heat sink 114 is disposed inside the capacitor housing 1, and the heat dissipation end of the heat sink 114 is fixedly connected to the outside of the capacitor housing 1.

[0037] The specific usage and function of this embodiment are as follows: During product assembly, the capacitor core 2 is first placed inside the capacitor housing 1, ensuring that the upper end face of the capacitor core 2 is tightly fitted with the lower end face of the top limiting member 3. The outer side of the top limiting member 3 is in close contact with the inner side of the shock-absorbing contact member 112. The shock-absorbing contact member 112 adopts a high-temperature resistant silicone pad structure, which can effectively absorb axial vibration energy and prevent rigid collisions between the top limiting member 3 and the capacitor housing 1. The mounting limiting post 113, which is fixedly connected to the inner side of the capacitor housing 1, provides precise radial positioning for the top limiting member 3, preventing it from shifting or misaligning during long-term vibration. Subsequently, the sealing bottom cover 6 is fixed to the lower inner side of the capacitor housing 1 with bolts, completing the overall encapsulation of the core. Auxiliary support members 102 are slidably connected to the outer side of the auxiliary support slide rails 101 integrally formed on the left and right sides of the capacitor housing 1. By rotating the support pressing screw 103, the auxiliary support members 102 can be driven to slide up and down along the auxiliary support slide rails 101, and the extension length of the auxiliary support members 102 can be flexibly adjusted so that the auxiliary support members 102 can fit tightly with the mounting base, forming an additional support point and dispersing the vibration load on the capacitor housing 1. In terms of electrical connection and shock absorption protection, a curved spiral stress relief member 104 is fixedly connected to the middle position of the capacitor pin 7. This structure can absorb vibration stress in the axial, radial and torsional directions at the same time, avoiding the vibration energy from being directly transmitted to the circuit board solder joint, and fundamentally preventing the solder joint fatigue fracture failure. The upper end of the capacitor pin 7 is fixedly connected to the mounting limit stage 105. The connecting contact point 106 is elastically supported above the mounting limit stage 105 by the connecting contact spring 107. The connecting contact point 106 adopts a spherical contact structure, which can form adaptive multi-point contact with the gold-plated end face of the capacitor core 2 to ensure the reliability of the electrical connection. At the same time, the connecting contact spring 107 can compensate for the small displacement of the capacitor core 2 during vibration in real time, completely avoiding the phenomenon of electrical connection interruption. Rotating the mounting screw 108 at the lower end of the sealing bottom cover 6 can drive the compression nut 109 to move axially, which in turn drives the two sets of compression rod transmission rods 111 to swing synchronously through the compression drive component 110. This causes the clamping block structure on the outside of the compression rod transmission rod 111 to press the capacitor pin 7, thus achieving reliable fixation of the capacitor pin 7. The finned end of the heat sink 114 is located inside the capacitor housing 1 and is in close contact with the side of the capacitor core 2, which can quickly conduct the heat generated by the core during operation to the outside of the housing. The heat dissipation end of the heat sink 114 is fixedly connected to the outside of the capacitor housing 1, which greatly increases the contact area with air and significantly improves the heat dissipation efficiency. Example 2

[0038] like Figures 1 to 8 As shown: The present invention provides a high shock-resistant metallized film capacitor, which, based on the first embodiment, further includes a one-way exhaust assembly disposed inside the one-way exhaust cylinder 5.

[0039] The one-way exhaust assembly includes: an exhaust fixing plate 501, an exhaust guide rod 502, and a one-way exhaust plug 503; the exhaust fixing plate 501 is fixedly connected to the top of the one-way exhaust cylinder 5, and the exhaust fixing plate 501 has a plurality of exhaust hole structures; the exhaust guide rod 502 is fixedly connected to the lower end of the exhaust fixing plate 501; the one-way exhaust plug 503 is slidably connected to the outside of the exhaust guide rod 502, and the one-way exhaust plug 503 is a conical rubber plug structure.

[0040] The one-way exhaust assembly also includes a one-way limiting spring 504 and an exhaust limiting platform 505; the upper end of the one-way limiting spring 504 is fixedly connected to the exhaust fixing plate 501, and the lower end of the one-way limiting spring 504 is fixedly connected to the one-way exhaust plug 503; the exhaust limiting platform 505 is fixedly connected to the lower inner side of the one-way exhaust cylinder 5, and the exhaust limiting platform 505 is in contact with the one-way exhaust plug 503.

[0041] The specific usage and function of this embodiment are as follows: When the capacitor core 2 generates gas through self-healing, the gas accumulates inside the capacitor casing 1, causing the internal pressure to gradually increase. When the internal pressure exceeds the sum of the preload of the one-way limiting spring 504 and the external atmospheric pressure, the gas enters the lower space of the one-way exhaust cylinder 5 through the exhaust channel 4, pushing the one-way exhaust plug 503 upwards to slide along the exhaust guide rod 502. At the same time, it compresses the one-way limiting spring 504, causing the conical surface of the one-way exhaust plug 503 to separate from the conical sealing surface of the exhaust limiting platform 505, forming an exhaust gap. The internal gas enters the one-way exhaust cylinder 5 through this gap. The upper space of the air cylinder 5 is eventually discharged to the external environment through the exhaust hole on the exhaust fixing plate 501. After the internal gas is discharged, the internal pressure of the shell gradually decreases. When the pressure is less than the preload of the one-way limit spring 504, the one-way limit spring 504 automatically extends and resets, pushing the one-way exhaust plug 503 to slide down along the exhaust guide rod 502 until the conical surface of the one-way exhaust plug 503 is tightly fitted with the conical sealing surface of the exhaust limit platform 505 again, restoring the sealing state and effectively preventing external humid air, dust and corrosive gases from entering the capacitor, avoiding the degradation of internal insulation performance and corrosion of the metallization layer.

[0042] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0043] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0044] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high shock-resistant metallized thin-film capacitor, characterized in that: The capacitor assembly includes a capacitor housing (1), a capacitor core (2), a top limiting member (3), an exhaust channel (4), a one-way exhaust pipe (5), a sealing bottom cover (6), capacitor leads (7), a shock-absorbing and protective assembly, and a one-way exhaust assembly. The capacitor core (2) is placed inside the capacitor housing (1). The top limiting member (3) is fixedly connected to the upper part of the inside of the capacitor housing (1). The exhaust channel (4) is opened above the capacitor housing (1). The one-way exhaust pipe (5) is fixedly connected to the upper part of the capacitor housing (1) and communicates with the exhaust channel (4). The sealing bottom cover (6) is fixedly connected to the lower part of the inside of the capacitor housing (1) by bolts. The capacitor leads (7) are slidably connected to the lower part of the inside of the sealing bottom cover (6). The shock-absorbing and protective assembly is connected to the capacitor housing (1). The one-way exhaust assembly is located inside the one-way exhaust pipe (5).

2. The high shock-resistant metallized film capacitor as described in claim 1, characterized in that: The shock absorption and protection assembly includes: auxiliary support slide rail (101) and auxiliary support member (102); the auxiliary support slide rail (101) is provided in two sets, and the two sets of auxiliary support slide rail (101) are integrally formed on the left and right sides of the capacitor shell (1); the auxiliary support member (102) is provided in two sets, and the two sets of auxiliary support members (102) are slidably connected to the outside of the auxiliary support slide rail (101).

3. The high shock-resistant metallized film capacitor as described in claim 2, characterized in that: The shock absorption and protection assembly also includes: a support extrusion screw (103); the support extrusion screw (103) is provided in two sets, the two sets of support extrusion screws (103) are respectively rotatably connected to the bottom of the auxiliary support slide rail (101), and the two sets of support extrusion screws (103) are respectively threadedly connected to the auxiliary support member (102).

4. The high shock-resistant metallized film capacitor as described in claim 1, characterized in that: The shock absorption and protection assembly also includes a stress relief component (104); the stress relief component (104) is a curved spiral structure and is fixedly connected to the middle position of the capacitor pin (7).

5. The high shock-resistant metallized film capacitor as described in claim 1, characterized in that: The shock absorption and protection assembly also includes: a mounting limit platform (105), a connecting contact point (106), and a connecting contact spring (107); the mounting limit platform (105) is fixedly connected to the upper end of the capacitor pin (7); the connecting contact point (106) is a spherical contact structure, and the connecting contact point (106) is slidably connected above the capacitor pin (7); the connecting contact spring (107) is fixedly connected to the lower end of the connecting contact point (106), and the lower end of the connecting contact spring (107) is fixedly connected to the mounting limit platform (105).

6. The high shock-resistant metallized film capacitor as described in claim 5, characterized in that: The shock absorption and protection assembly also includes: a mounting extrusion screw (108), an extrusion nut (109), an extrusion drive (110), and an extrusion rod transmission rod (111); the mounting extrusion screw (108) is rotatably connected to the lower middle position of the sealing bottom cover (6); the extrusion nut (109) is threadedly connected to the outside of the mounting extrusion screw (108); the extrusion drive (110) is rotatably connected above the extrusion nut (109); there are two sets of extrusion rod transmission rods (111), and the outer sides of the two sets of extrusion rod transmission rods (111) are respectively hinged with a locking block structure, the inner sides of the two sets of extrusion rod transmission rods (111) are respectively hinged to the extrusion drive (110), and the locking block structures of the two sets of extrusion rod transmission rods (111) are respectively in contact with the capacitor pin (7).

7. The high shock-resistant metallized film capacitor as described in claim 1, characterized in that: The shock absorption and protection assembly also includes: a shock-resistant contact (112) and a mounting limit post (113); the shock-resistant contact (112) is fixedly connected to the inner side of the capacitor housing (1), the shock-resistant contact (112) is a high-temperature resistant silicone pad structure, and the inner side of the shock-resistant contact (112) is in contact with the top limit post (3); the mounting limit post (113) is fixedly connected to the inner side of the capacitor housing (1).

8. The high shock-resistant metallized film capacitor as described in claim 1, characterized in that: The shock absorption and protection assembly also includes a heat sink (114); the finned end of the heat sink (114) is disposed inside the capacitor housing (1), and the heat dissipation end of the heat sink (114) is fixedly connected to the outside of the capacitor housing (1).

9. The high shock-resistant metallized film capacitor as described in claim 1, characterized in that: The one-way exhaust assembly includes: an exhaust fixing plate (501), an exhaust guide rod (502), and a one-way exhaust plug (503); the exhaust fixing plate (501) is fixedly connected above the one-way exhaust cylinder (5), and the exhaust fixing plate (501) has a plurality of exhaust hole structures; the exhaust guide rod (502) is fixedly connected to the lower end of the exhaust fixing plate (501); the one-way exhaust plug (503) is slidably connected to the outside of the exhaust guide rod (502), and the one-way exhaust plug (503) is a conical rubber plug structure.

10. The high shock-resistant metallized film capacitor as described in claim 9, characterized in that: The one-way exhaust assembly further includes: a one-way limiting spring (504) and an exhaust limiting platform (505); the upper end of the one-way limiting spring (504) is fixedly connected to the exhaust fixing plate (501), and the lower end of the one-way limiting spring (504) is fixedly connected to the one-way exhaust plug (503); the exhaust limiting platform (505) is fixedly connected to the lower inner side of the one-way exhaust cylinder (5), and the exhaust limiting platform (505) is in contact with the one-way exhaust plug (503).

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