Self-healing capacitor with overvoltage protection and assembling method

Abstract

The invention relates to the technical field of self-healing type capacitors, in particular to a self-healing type capacitor with overvoltage protection and an assembling method, and the capacitor comprises an outer protection mechanism which comprises a main shell, an upper pressing plate arranged above the main shell, a lower pressing box arranged below the main shell, and an upper sealing box arranged at the outer side of the upper pressing plate, the upper pressing plate with the T-shaped vertical section is connected to the main shell in a sleeving mode. The protection mechanism comprises pressure relief assemblies arranged below the polar plate and a switching assembly arranged above the upper pressing plate, two convex overflow grooves used for being matched with the two pressure relief assemblies respectively are formed in the middle partition plate in the front-back direction, and the large-size opening ends of the two convex overflow grooves are close to the two capacitor cavities respectively; according to the self-healing capacitor, the phenomenon that the capacitor is expanded and damaged due to high voltage brought by internal high temperature can be effectively avoided, the overall safety is high, and the practicability is good.

Description

Technical Field

[0001] This invention relates to the field of self-healing capacitor technology, and more particularly to a self-healing capacitor with overvoltage protection and its assembly method. Background Technology

[0002] As a core energy storage and filtering component in power systems and electronic equipment, the reliability of capacitors directly affects the stability of the overall equipment. Traditional capacitors use a stacked structure of metal foil and insulating dielectric. When the dielectric breaks down due to overvoltage, local defects or aging, a permanent short circuit will be formed between the electrodes, leading to capacitor failure or even safety accidents.

[0003] To overcome this deficiency, self-healing capacitors have emerged. Their core innovation lies in the use of metallized electrodes, i.e., a metal layer is deposited on the surface of the dielectric film as the electrode. When a local breakdown occurs in the dielectric, the short-circuit current generates high temperatures at the breakdown point, causing the surrounding metal layer to vaporize and form an insulating isolation zone, achieving "self-healing" of the fault point and preventing overall failure. Existing publications such as CN 116053036A - A novel fire-resistant self-healing capacitor and CN104078233B - A four-layer wound self-healing capacitor element both disclose a self-healing capacitor. While these self-healing capacitors can meet the needs of daily power system use, existing self-healing capacitors still have the following shortcomings in practical applications:

[0004] 1. While existing self-healing capacitors can provide some protection for the plates under special conditions such as overvoltage, preventing capacitor failure or damage, they still generate significant internal heat when exposed to overvoltage. This heat buildup causes the internal insulating fluid to expand, potentially leading to damage due to excessive internal pressure. Even if a brief overvoltage does not damage the capacitor, the high internal temperature still prevents it from continuing to function, making it generally less practical.

[0005] 2. When using existing self-healing capacitors, the heat dissipation devices mainly consist of surface heat dissipation strips and external cooling fans for auxiliary heat dissipation. Although such heat dissipation methods can play a certain role in heat dissipation when the capacitor is in normal use, they are difficult to effectively dissipate heat when the capacitor is overvoltage or the internal and external temperatures are high.

[0006] Therefore, it is necessary to improve the existing technology to solve the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0008] Given that existing self-healing capacitors still pose significant safety hazards due to internal temperature rise when encountering overvoltage, a self-healing capacitor with overvoltage protection is proposed.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a self-healing capacitor with overvoltage protection, comprising an outer protective mechanism including a main housing, an upper pressure plate disposed above the main housing, a lower pressure box disposed below the main housing, and an upper sealing box disposed outside the upper pressure plate. The upper pressure plate, with a vertical cross-section of T-shape, is sleeved on the main housing. Three partitions are fixedly arranged in an array along the left-right direction on the inner wall of the main housing, and the three partitions divide the interior of the main housing into two capacitor cavities located in the middle and two cooling cavities located on the outer side. Electrodes are disposed on the sidewalls of the partitions on both sides of the capacitor cavities. A set of first conductive heads is fixedly disposed along the interlocking of the upper pressure plate above each capacitor cavity, and the lower ends of the two first conductive heads in the same group are electrically connected to two electrodes in the same capacitor cavity, respectively. At least one electrode is fixedly disposed on the top plate of the upper sealing box. Two second conductive heads; and a protection mechanism, including a pressure relief assembly disposed below the electrode plate and a switching assembly disposed above the upper pressure plate. Two convex overflow grooves, each for cooperation between the two pressure relief assemblies, are formed along the front-to-back direction on the central partition plate. The large openings of the two convex overflow grooves are respectively close to the two capacitor cavities. The pressure relief assembly includes a convex block, a first spring, and a linkage bar. The convex block is loosely fitted in the convex overflow groove. Guide posts are symmetrically fixed at both ends of one side of the linkage bar, and the two guide posts are slidably sleeved on both sides of the large-size plate of the convex block. The free ends of the guide posts are fixed to the partition plate by locking bolts. A first spring is slidably sleeved on the guide post between the linkage bar and the convex block. The switching assembly is used to adjust the electrical connection between one of the two sets of first conductive heads and the second conductive head.

[0010] The beneficial effects of this invention are as follows: When this self-healing capacitor is in use, the two capacitor chambers are used independently, and the volume of insulating liquid in the spare capacitor chamber is smaller than that in the used capacitor chamber. When an overvoltage occurs in the normally used capacitor chamber, causing the internal temperature to become too high, the high temperature will cause the internal insulating liquid to expand and the internal pressure to increase. Under this pressure, the convex block on the side of the large-size plate near the spare capacitor chamber is squeezed out of the convex overflow groove by the insulating liquid. In this way, pressure can be relieved by the flow of insulating liquid into the spare capacitor chamber, avoiding the problem of excessive internal pressure leading to capacitor explosion. At the same time, the switching component will switch to enable electrical conduction between the second conductive head and the first conductive head above the spare capacitor chamber, thereby protecting the capacitor while enabling uninterrupted use of the capacitor. Overall, it has strong practicality.

[0011] As a preferred embodiment of the self-healing capacitor with overvoltage protection of the present invention, wherein: a first T-shaped strip is symmetrically fixed on one side of the electrode plate, and a T-shaped limiting groove with an open lower end is opened on one side of the partition plate in the vertical direction for clearance fit with the first T-shaped strip; a second T-shaped strip for clearance fit in the T-shaped limiting groove is fixed on the top surface of the closed end of the lower pressure box.

[0012] As a preferred embodiment of the self-healing capacitor with overvoltage protection of the present invention, an outer limiting ring is fixedly provided on the top surface of the lower pressure box, and the outer limiting ring is sleeved on the outer side of the lower end of the main housing; an outer extension ring is fixedly provided on the outer side wall of the upper end of the main housing, and the outer extension ring is fixed to the upper sealing box by a fixing bolt.

[0013] As a preferred embodiment of the self-healing capacitor with overvoltage protection of the present invention, the switching assembly includes a mounting plate fixed on the top surface of the upper pressure plate, a ceramic block disposed above the mounting plate, two conductive strips arranged in a front-to-back direction above the ceramic block, and an electromagnetic post disposed on one side of the ceramic block; connecting plates are symmetrically fixed on the top surfaces of the mounting plates on the left and right sides of the ceramic block, and the electromagnetic post is fixedly sleeved on one of the connecting plates; guide rods are symmetrically arranged on both sides of the electromagnetic post, and the ends of the guide rods are respectively fixedly connected to the two connecting plates; the ceramic block is slidably sleeved on the guide rods; an iron sheet is embedded and fixed on the side of the ceramic block near the electromagnetic post, and a second spring is slidably sleeved on the guide rod between the electromagnetic post and the iron sheet.

[0014] As a preferred embodiment of the self-healing capacitor with overvoltage protection of the present invention, wherein: a plug is fixed on the bottom surface of the conductive strip, and a slot for the plug to be inserted is opened on the top surface of the ceramic block; a third conductive head is spirally sleeved in the middle of the top surface of the conductive strip, and the two third conductive heads are electrically connected to the lower ends of the two second conductive heads respectively through conductive lines; both ends of the bottom surface of the conductive strip are provided with fitting grooves for the fitting and fixing of elastic metal sheets, and the elastic metal sheets are used to abut against the top surface of the first conductive head; the two first conductive heads in the same group are arranged in an array along the front-back direction, and the two first conductive heads and the two conductive strips are arranged in a one-to-one correspondence.

[0015] Given the shortcomings of existing methods for heat dissipation in capacitors, this invention provides a further optimized and improved self-healing capacitor with overvoltage protection. The improved capacitor further includes a cooling circulation mechanism comprising a first delivery pipe, a controller, and a second delivery pipe. The inner top surface of the lower pressure box is symmetrically fixed with second connecting pipes communicating with two cooling chambers, and these two connecting pipes are connected via the first delivery pipe. The top surface of the upper pressure plate is symmetrically fixed with first connecting pipes communicating with two cooling chambers, and these two first connecting pipes are connected via the second delivery pipe. A micro-pump is connected to the first delivery pipe and is fixedly connected to the inner top surface of the lower pressure box. The controller is fixedly connected to the inner top surface of the lower pressure box.

[0016] Another beneficial effect of the present invention is that, when the self-healing capacitor is in use, by setting two cooling chambers on the outside of the two capacitor chambers, when the temperature is too high, the controller controls the operation of the micro pump, and with the delivery of the first delivery pipe and the second delivery pipe, the coolant in the two cooling chambers will circulate, thereby realizing the rapid removal of the high temperature inside the capacitor chamber and achieving effective heat dissipation.

[0017] As a preferred embodiment of the self-healing capacitor with overvoltage protection of the present invention, the lower pressure box has an array of ventilation slots on its side wall, and a fixing strip is fixed on the lower outer wall of the long side of the lower pressure box, and the fixing strip has mounting holes.

[0018] As a preferred embodiment of the self-healing capacitor with overvoltage protection of the present invention, heat dissipation grooves are arranged in an array along the vertical direction on both the left and right outer walls of the main housing.

[0019] In addition, the present invention also provides the following technical solution: an assembly method for a self-healing capacitor with overvoltage protection, wherein the self-healing capacitor with overvoltage protection is assembled according to the following steps.

[0020] S1: Connect the first conveying pipe to the second connecting pipe, connect the second conveying pipe to the first connecting pipe, and install the switching component on the upper pressure plate after it has been assembled.

[0021] S2: Assemble the pressure relief assembly in the convex overflow groove, and then insert the first T-shaped strip on the electrode plate into the T-shaped limiting groove to complete the installation of the electrode plate;

[0022] S3: Apply adhesive to the bottom surface of the main housing and the side wall of the outer limiting ring, then insert the second T-shaped strip into the T-shaped limiting groove to achieve the fit between the main housing and the lower pressure box, and press for a period of time to achieve the connection and fixation between the main housing and the lower pressure box.

[0023] S4: Add insulating liquid and coolant to the capacitor cavity and cooling cavity respectively, and complete the conductive line connection between the electrode plate and the first conductive head;

[0024] S5: Apply adhesive to the lower side wall of the upper pressure plate and the top surface of the outer shell respectively, and press them together for a period of time to achieve the connection and fixation between the main shell and the upper pressure plate;

[0025] S6: Connect the second and third conductive heads with conductive wires, and finally connect the upper sealing box to the main housing to complete the assembly of the capacitor. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0027] Figure 1 This is a schematic diagram of the overall structure of a self-healing capacitor with overvoltage protection according to the present invention.

[0028] Figure 2 For the present invention Figure 1 A schematic diagram of the bottom of the structure.

[0029] Figure 3 For the present invention Figure 1 A sectional view of the structure in the vertical direction.

[0030] Figure 4 This is a diagram showing the main housing, lower pressure box, and upper sealing box to be assembled in this invention.

[0031] Figure 5 This is a diagram showing the assembly of the main housing, pressure relief assembly, and electrode plates in this invention.

[0032] Figure 6 This is a schematic diagram illustrating the cooperation between the upper pressure plate and the switching component in this invention.

[0033] Figure 7 For the present invention Figure 6Exploded view of the structure.

[0034] Figure 8 This is an exploded view of the switching component in this invention.

[0035] Figure 9 This is a diagram showing the mating of the lower pressure box and the first conveying pipe in this invention. Detailed Implementation

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0039] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0040] Example 1

[0041] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 This is the first embodiment of the present invention. This embodiment provides a self-healing capacitor with overvoltage protection. When the self-healing capacitor is in use, the outer protection mechanism 100 constitutes the whole of the capacitor, and the protection mechanism 200 is used to perform protective switching when the capacitor experiences overvoltage and high temperature.

[0042] Specifically, the outer protective mechanism 100 includes a main housing 101, an upper pressure plate 102 disposed above the main housing 101, a lower pressure box 103 disposed below the main housing 101, and an upper sealing box 104 disposed outside the upper pressure plate 102. The upper pressure plate 102, with a vertical cross-section of T, is sleeved on the main housing 101. An adhesive is used to secure the upper pressure plate 102 and the main housing 101. An outer limiting ring 103c is fixed on the top surface of the lower pressure box 103. 3c is sleeved on the outer side of the lower end of the main housing 101, and the outer limiting ring 103c and the main housing 101 can be fixed together by adhesive; an extension ring 101d is fixed on the outer side wall of the upper end of the main housing 101, and the extension ring 101d is fixed to the upper sealing box 104 by fixing bolts, so as to realize the detachable connection of the upper sealing box 104; and the protection mechanism 200 includes a pressure relief component 201 disposed below the electrode plate 101c and a switching component 202 disposed above the upper pressure plate 102.

[0043] See details Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, three partitions 101b are fixedly arranged in a left-right array on the inner wall of the main housing 101, dividing the interior of the main housing 101 into two capacitor chambers 101b-2 located in the middle and two cooling chambers 101b-1 located on the outer sides. The capacitor chambers 101b-2 store insulating fluid, and the two cooling chambers 101b-1 store coolant. One capacitor chamber 101b-2 is for normal use, and the other is for standby. Electrodes 101c are provided on the sidewalls of the partitions 101b on both sides of the capacitor chamber 101b-2. The insulating fluid is stored between the two electrodes 101c, forming... A capacitor has a set of first conductive heads 102a fixedly mounted on the upper pressure plate 102 above each capacitor cavity 101b-2. The lower ends of the two first conductive heads 102a in the same set are electrically connected to the two plates 101c in the same capacitor cavity 101b-2, so that the two plates 101c can be charged and discharged. At least two second conductive heads 104a are fixedly mounted on the top plate of the upper sealing box 104. The second conductive heads 104a are used for external power facilities. The switching component 202 is used to adjust the electrical connection between one of the two sets of first conductive heads 102a and the second conductive head 104a.

[0044] A first T-shaped strip 101c-1 is symmetrically fixed on one side of the electrode plate 101c, and a T-shaped limiting groove 101b-3 with an open lower end is opened on one side of the partition plate 101b in the vertical direction for clearance fit with the first T-shaped strip 101c-1, so as to realize the detachable connection between the electrode plate 101c and the partition plate 101b; a second T-shaped strip 103d is fixed on the top surface of the closed end of the lower pressure box 103 for clearance fit with the T-shaped limiting groove 101b-3, the upper end of the second T-shaped strip 103d abuts against the bottom surface of the first T-shaped strip 101c-1, and the second T-shaped strip 103d fits in the T-shaped limiting groove 101b-3 to limit and fix the electrode plate 101c.

[0045] See details Figure 3 and Figure 5 As shown, two convex overflow grooves 101e are formed along the front-to-back direction on the partition 101b located in the middle, which are respectively used for the cooperation of the two pressure relief components 201. The large-sized openings of the two convex overflow grooves 101e are respectively close to the two capacitor cavities 101b-2. The pressure relief component 201 includes a convex block 201a, a first spring 201b, and a linkage bar 201c. The convex block 201a is fitted into the convex overflow groove 101e with a clearance. Guide posts 201 are symmetrically fixed at both ends of one side of the linkage bar 201c. c-1, and two guide posts 201c-1 are slidably sleeved on both sides of the large-size plate of the convex block 201a. The free end of the guide post 201c-1 is fixed to the partition 101b by locking bolt 201c-2. In this way, a detachable connection can be realized between the pressure relief component 201 and the partition 101b. A first spring 201b is slidably sleeved on the guide post 201c-1 between the linkage bar 201c and the convex block 201a. The first spring 201b is used for the reset of the convex block 201a.

[0046] In operation, the insulating fluid volume of the used capacitor cavity 101b-2 is larger than that of the spare capacitor cavity 101b-2. When the internal pressure of the used capacitor cavity 101b-2 is high due to high temperature, the high pressure will squeeze the convex block 201a on the side of the large-size plate near the spare capacitor cavity 101b-2. The convex block 201a slides along the axis of the guide post 201c-1 to move out of the convex overflow groove 101e, and the insulating fluid in the used capacitor cavity 101b-2 flows through the convex block 201a. The overflow channel 101e flows into the backup capacitor cavity 101b-2, which can relieve the pressure inside the capacitor cavity 101b-2. The insulating fluid flowing into the backup capacitor cavity 101b-2 can replenish the insulation fluid when it is low, so that both capacitor cavities 101b-2 can maintain high performance during use. It should be noted that both capacitor cavities 101b-2 can be used as backup capacitor cavities 101b-2, and can also be used as capacitor cavities 101b-2 in normal operation.

[0047] Example 2

[0048] Reference Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The difference is that, in order to enable timely electrical connection switching when used with the two capacitor cavities 101b-2, the structure of the switching component 200 is described in detail so as to better implement the present invention.

[0049] Specifically, the switching assembly 202 includes a mounting plate 202a fixed to the top surface of the upper pressure plate 102, a ceramic block 202b disposed above the mounting plate 202a, two conductive strips 202c arranged in a front-to-back direction above the ceramic block 202b, and an electromagnetic post 202d disposed on one side of the ceramic block 202b; connecting plates 202a-1 are symmetrically fixed to the top surface of the mounting plate 202a on both sides of the ceramic block 202b, and the electromagnetic post 202d is fixedly sleeved on one of the connecting plates 202a-1; guide rods 20 are symmetrically disposed on both sides of the electromagnetic post 202d. 2e, and the ends of the guide rod 202e are respectively fixedly connected to the two connecting plates 202a-1. The ceramic block 202b is slidably sleeved on the guide rod 202e. An iron piece 202b-2 is embedded and fixed on the side of the ceramic block 202b near the electromagnetic post 202d. A second spring 202e-1 is slidably sleeved on the guide rod 202e between the electromagnetic post 202d and the iron piece 202b-2. The second spring 202e-1 can realize the reset of the ceramic block 202b, and the guide rod 202e can play a limiting and guiding role in the movement of the ceramic block 202b.

[0050] A plug 202c-3 is fixedly mounted on the bottom surface of the conductive strip 202c, and a slot 202b-1 for the plug 202c-3 to be inserted is provided on the top surface of the ceramic block 202b. Adhesive is filled into the slot 202b-1 to bond the plug 202c-3 to the ceramic block 202b for positioning and fixation. A third conductive head 202c-1 is spirally sleeved on the center of the top surface of the conductive strip 202c, and the two third conductive heads 202c-1 are electrically connected to the lower ends of the two second conductive heads 104a respectively through conductive lines, thereby facilitating electrical conduction between them. Both ends of the bottom surface of the conductive strip 202c are provided with fitting grooves 202c-4 for fitting and fixing the elastic metal sheet 202c-2. The elastic metal sheet 202c-2 is used to abut against the top surface of the first conductive head 102a. The cooperation between the elastic metal sheet 202c-2 and the conductive strip 202c can realize the electrical conduction between the first conductive head 102a and the third conductive head 202c-1. The two first conductive heads 102a in the same group are arranged in an array along the front-back direction, and the two first conductive heads 102a and the two conductive strips 202c are arranged in a one-to-one correspondence.

[0051] When in use, the above-mentioned configuration allows the electromagnetic column 202d to be energized, generating magnetism to magnetically attract the iron sheet 202b-2. This enables the ceramic block 202b to move the conductive strip 202c along the axis of the guide rod 202e, thereby switching the elastic metal sheet 202c-2 on the conductive strip 202c between the two sets of second conductive heads 102a. When the electromagnetic column 202d is de-energized and demagnetized, the elastic metal sheet 202c-2 on the conductive strip 202c can switch between the two sets of second conductive heads 102a under the reset action of the second spring 202e-1. In this way, the electrical conduction can be switched according to the state of use of the capacitor cavity 101b-2 in actual use.

[0052] Additionally, it should be noted that, in order to improve the timeliness of electrical conduction switching, temperature and pressure sensors can be installed in the capacitor cavity 101b-2 to monitor the interior of the capacitor cavity 101b-2. The sensors and the electromagnetic column 202d are both electrically connected to the controller 302 through conductive lines.

[0053] Example 3

[0054] Reference Figure 2 , Figure 3 , Figure 4 and Figure 9 This is the third embodiment of the present invention. This embodiment is based on any of the above embodiments, but the difference is that, in order to improve the efficient heat dissipation of the capacitor during use and avoid damage caused by the inability of the internal temperature of the capacitor to dissipate in time, a cooling circulation mechanism 300 is proposed.

[0055] Specifically, the circulating cooling mechanism 300 includes a first conveying pipe 301, a controller 302, and a second conveying pipe 303. The inner top surface of the lower pressure box 103 is symmetrically fixed with second connecting pipes 103e, each communicating with one of the two cooling chambers 101b-1, and the two second connecting pipes 103e are connected via the first conveying pipe 301. The top surface of the upper pressure plate 102 is symmetrically fixed with first connecting pipes 102b, each communicating with one of the two cooling chambers 101b-1, and the two first connecting pipes 102b are connected via the second conveying pipe 303. A micro pump 301a is connected to the first conveying pipe 301, and the micro pump 301a is fixedly connected to the inner top surface of the lower pressure box 103. The controller 302 is fixedly connected to the inner top surface of the lower pressure box 103.

[0056] When in use, the above-mentioned configuration allows the coolant in one cooling chamber 101b-1 to be transferred to the other cooling chamber 101b-1 through the first delivery pipe 301 via the operation of the micro pump 301a. The coolant in the other cooling chamber 101b-1 then flows back to the original cooling chamber 101b-1 through the second delivery pipe 303. This enables the coolant in the two cooling chambers 101b-1 to circulate, thereby achieving rapid heat transfer to the capacitor chamber 101b-2.

[0057] Additionally, it should be noted that the controller 302 is electrically connected to the micro pump 301a via a conductive line, and the power supply module of the controller 302 is independently deployed and does not share a power system with the capacitor itself, in order to avoid overvoltage affecting its use.

[0058] Furthermore, ventilation slots 103a are arrayed on the side wall of the lower pressure box 103, and a fixing strip 103b is fixed on the lower outer wall of the long side of the lower pressure box 103, and mounting holes 103b-1 are opened on the fixing strip 103b to facilitate the fixed installation of the capacitor; heat dissipation slots 101a are arrayed in the vertical direction on the left and right outer side walls of the main housing 101, and the heat dissipation slots 101a can increase the surface area to help improve the heat dissipation effect.

[0059] Example 4

[0060] This embodiment is the fourth embodiment of the present invention. This embodiment provides an assembly method for a self-healing capacitor with overvoltage protection. Specifically, the assembly is carried out according to the following steps;

[0061] S1: Connect the first conveying pipe 301 to the second connecting pipe 103e, connect the second conveying pipe 303 to the first connecting pipe 102b, and install the switching component 202 on the upper pressure plate 102 after the switching component 202 is assembled.

[0062] S2: Assemble the pressure relief component 201 at the position of the convex overflow groove 101e, and then insert the first T-shaped strip 101c-1 on the electrode plate 101c into the T-shaped limiting groove 101b-3 to complete the installation of the electrode plate 101c.

[0063] S3: Apply adhesive to the bottom surface of the main housing 101 and the side wall of the outer limiting ring 103c, then insert the second T-shaped strip 103d into the T-shaped limiting groove 101b-3 to achieve the fit between the main housing 101 and the lower pressure box 103, and after a period of pressing, achieve the connection and fixation between the main housing 101 and the lower pressure box 103.

[0064] S4: Add insulating liquid and coolant to capacitor cavity 101b-2 and cooling cavity 101b-1 respectively, and complete the conductive line connection between electrode plate 101c and first conductive head 102a;

[0065] S5: Apply adhesive to the lower side wall of the upper pressure plate 102 and the top surface of the outer shell respectively, and press them together for a period of time to achieve the connection and fixation between the main shell 101 and the upper pressure plate 102.

[0066] S6: Connect the second conductive head 104a and the third conductive head 202c-1 with conductive wires, and finally connect the upper sealing box 104 to the main housing 101 to complete the assembly of the capacitor.

[0067] Additionally, it should be noted that components not described in detail in this article are existing technologies.

[0068] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, the use of materials, colors, orientations, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the positions of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or modified. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the invention is not limited to the particular embodiments but extends to a variety of modifications that still fall within the scope of the appended claims.

[0069] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0070] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A self-healing capacitor with overvoltage protection, characterized in that: include, The outer protective mechanism (100) includes a main housing (101), an upper pressure plate (102) disposed above the main housing (101), a lower pressure box (103) disposed below the main housing (101), and an upper sealing box (104) disposed outside the upper pressure plate (102). The upper pressure plate (102), with a vertical cross-section of T, is sleeved on the main housing (101). Three partitions (101b) are fixedly arranged in an array along the left-right direction on the inner wall of the main housing (101), and the three partitions (101b) divide the interior of the main housing (101) into two capacitor cavities (101b-101b) located in the middle. 2) and two cooling chambers (101b-1) located on the outer side, and electrode plates (101c) are provided on the side walls of the partitions (101b) on both sides of the capacitor chamber (101b-2). A set of first conductive heads (102a) is embedded and fixed on the upper pressure plate (102) above each capacitor chamber (101b-2), and the lower ends of the two first conductive heads (102a) in the same set are electrically connected to the two electrode plates (101c) in the same capacitor chamber (101b-2). At least two second conductive heads (104a) are embedded and fixed on the top plate of the upper sealing box (104); and, The protection mechanism (200) includes a pressure relief assembly (201) disposed below the electrode plate (101c) and a switching assembly (202) disposed above the upper pressure plate (102). Two convex overflow grooves (101e) are formed along the front-to-back direction on the central partition plate (101b), each for cooperation with one of the two pressure relief assemblies (201). The large openings of the two convex overflow grooves (101e) are respectively close to the two capacitor cavities (101b-2). The pressure relief assembly (201) includes a convex block (201a), a first spring (201b), and a linkage bar (201c). The convex block (201a) is clearance-fitted into the convex overflow groove (101c). In e), guide posts (201c-1) are symmetrically fixed at both ends of one side of the linkage bar (201c), and the two guide posts (201c-1) are slidably sleeved on both sides of the large-size plate of the convex block (201a). The free end of the guide post (201c-1) is fixed to the partition plate (101b) by locking bolt (201c-2). A first spring (201b) is slidably sleeved on the guide post (201c-1) between the linkage bar (201c) and the convex block (201a). The switching component (202) is used to adjust the electrical connection between one of the two sets of first conductive heads (102a) and the second conductive head (104a).

2. A self-healing capacitor with overvoltage protection as described in claim 1, characterized in that: The electrode plate (101c) is symmetrically fixed with a first T-shaped strip (101c-1) on one side surface, and a T-shaped limiting groove (101b-3) with an open lower end is opened on one side surface of the partition plate (101b) in the vertical direction for clearance fit with the first T-shaped strip (101c-1); a second T-shaped strip (103d) for clearance fit with the T-shaped limiting groove (101b-3) is fixed on the top surface of the closed end of the lower pressure box (103).

3. A self-healing capacitor with overvoltage protection as described in claim 2, characterized in that: An outer limiting ring (103c) is fixed on the top surface of the lower pressure box (103), and the outer limiting ring (103c) is sleeved on the outer side of the lower end of the main housing (101); An extension ring (101d) is fixed on the upper outer side wall of the main housing (101), and the extension ring (101d) is fixed to the upper sealing box (104) by means of fixing bolts.

4. A self-healing capacitor with overvoltage protection as described in claim 1 or 3, characterized in that: The switching assembly (202) includes a mounting plate (202a) fixed on the top surface of the upper pressure plate (102), a ceramic block (202b) disposed above the mounting plate (202a), two conductive strips (202c) arranged in a front-back direction above the ceramic block (202b), and an electromagnetic post (202d) disposed on one side of the ceramic block (202b); connecting plates (202a-1) are symmetrically fixed on the top surfaces of the mounting plates (202a) on the left and right sides of the ceramic block (202b), and the electromagnetic post (202d) is fixedly sleeved on one of the connecting plates (202a-1). On a-1), guide rods (202e) are symmetrically arranged on both sides of the electromagnetic column (202d), and the ends of the guide rods (202e) are fixedly connected to two connecting plates (202a-1). A ceramic block (202b) is slidably sleeved on the guide rod (202e). An iron sheet (202b-2) is embedded and fixed on the side of the ceramic block (202b) near the electromagnetic column (202d). A second spring (202e-1) is slidably sleeved on the guide rod (202e) between the electromagnetic column (202d) and the iron sheet (202b-2).

5. A self-healing capacitor with overvoltage protection as described in claim 4, characterized in that: The bottom surface of the conductive strip (202c) is fixed with an insert (202c-3), and the top surface of the ceramic block (202b) is provided with a slot (202b-1) for inserting the insert (202c-3). The top surface of the conductive strip (202c) is spirally sleeved with a third conductive head (202c-1), and the two third conductive heads (202c-1) are electrically connected to the lower ends of the two second conductive heads (104a) through conductive lines. Both ends of the bottom surface of the conductive strip (202c) are provided with fitting grooves (202c-4) for fitting and fixing the elastic metal sheet (202c-2), and the elastic metal sheet (202c-2) is used to abut against the top surface of the first conductive head (102a). The two first conductive heads (102a) in the same group are arranged in an array along the front-back direction, and the two first conductive heads (102a) and the two conductive strips (202c) are arranged in a one-to-one correspondence.

6. A self-healing capacitor with overvoltage protection as described in claim 5, characterized in that: It also includes a cooling circulation mechanism (300), which includes a first conveying pipe (301), a controller (302), and a second conveying pipe (303). The inner top surface of the lower pressure box (103) is symmetrically fixed with second connecting pipes (103e) that communicate with two cooling chambers (101b-1) respectively, and the two second connecting pipes (103e) are connected through the first conveying pipe (301). The top surface of the upper pressure plate (102) is symmetrically fixed with first connecting pipes (102b) that communicate with two cooling chambers (101b-1) respectively, and the two first connecting pipes (102b) are connected through the second conveying pipe (303). A micro pump (301a) is connected to the first delivery pipe (301), and the micro pump (301a) is fixedly connected to the inner top surface of the lower pressure box (103); The controller (302) is fixedly connected to the inner top surface of the pressure box (103).

7. A self-healing capacitor with overvoltage protection as described in claim 6, characterized in that: The side wall of the lower pressure box (103) is provided with an array of ventilation slots (103a), and a fixing strip (103b) is fixed on the lower outer wall of the long side of the lower pressure box (103), and a mounting hole (103b-1) is provided on the fixing strip (103b).

8. A self-healing capacitor with overvoltage protection as described in claim 6, characterized in that: The main housing (101) has heat dissipation grooves (101a) arranged in a vertical array on both the left and right outer side walls.

9. A method for assembling a self-healing capacitor with overvoltage protection, characterized in that: The self-healing capacitor with overvoltage protection according to any one of claims 6 to 8 is assembled according to the following steps; S1: Connect the first conveying pipe (301) to the second connecting pipe (103e), connect the second conveying pipe (303) to the first connecting pipe (102b), and install the switching component (202) on the upper pressure plate (102) after it has been assembled. S2: Assemble the pressure relief assembly (201) at the position of the convex overflow groove (101e), and then insert the first T-shaped strip (101c-1) on the electrode plate (101c) into the T-shaped limiting groove (101b-3) to complete the installation of the electrode plate (101c); S3: Apply adhesive to the bottom surface of the main housing (101) and the side wall of the outer limiting ring (103c), and then insert the second T-shaped strip (103d) into the T-shaped limiting groove (101b-3) to achieve the fit between the main housing (101) and the lower pressure box (103), and after a period of pressing, achieve the connection and fixation between the main housing (101) and the lower pressure box (103); S4: Add insulating liquid and coolant to capacitor cavity (101b-2) and cooling cavity (101b-1) respectively, and complete the conductive line connection between electrode plate (101c) and first conductive head (102a); S5: Apply adhesive to the lower side wall of the upper pressure plate (102) and the top surface of the outer shell respectively, and press them together for a period of time to achieve the connection and fixation between the main shell (101) and the upper pressure plate (102); S6: Connect the second conductive head (104a) and the third conductive head (202c-1) with conductive lines, and finally connect the upper sealing box (104) to the main housing (101) to complete the assembly of the capacitor.

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