Novel capacitor rubber plug
By designing flow channels, annular sealing reinforcement ribs, and countersunk grooves on the supercapacitor plugs, the problem of electrolyte penetration and corrosion of the circuit board was solved, resulting in a longer service life and higher sealing performance.
Patent Information
- Application Number
- CN202620052798.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-16
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2036-01-16
AI Technical Summary
Due to the volatile nature of the electrolyte during the packaging process, residual electrolyte can diffuse and permeate into the sealed areas of existing supercapacitors, corroding the circuit board and affecting the product's lifespan.
A novel capacitor stopper is designed, comprising multiple flow channels, annular sealing reinforcement ribs, and countersunk grooves on the stopper body. The flow channels clean the electrolyte, the annular sealing reinforcement ribs enhance the sealing performance, and the countersunk grooves reduce the electrolyte pressure and prevent leakage.
It effectively cleans residual electrolyte from the seal, improves sealing, prevents electrolyte from corroding the circuit board, and extends the lifespan of the rubber stopper.
Smart Images
Figure CN223927223U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to super capacitor sealing part technical field, concretely is a new type capacitor rubber plug, is suitable for the lead pin type super capacitor of strict sealing requirement, needs long -term stable work. BACKGROUND
[0002] Super capacitor, also known as double-layer capacitor, is a passive device, between battery and ordinary capacitor, has the large current fast charge-discharge characteristics of capacitor, also has the energy storage characteristics of battery, and long repeated use life. The characteristics of super capacitor mainly reflect high power density, long cycle life, wide operating temperature limit, maintenance-free, green environmental protection and the like. Be widely used in intelligent three meter, sensor, microcomputer memory backup power supply.
[0003] Super capacitor utilizes rubber plug to guarantee sealing property when packaging, and the rubber plug is provided with lead hole corresponding to lead post. In the sealing process, the following problems exist: due to the volatile characteristics of electrolyte, a small amount of electrolyte will be left on the surface of the rubber plug, and after packaging with the aluminum shell, the residual electrolyte will enter the upper corner position of the aluminum shell seal and the matching position of the lead post and the lead hole. Under different working conditions, such as cold and hot change or high temperature and humidity environment, the residual electrolyte in the above two sealing positions will diffuse and penetrate to the outside, which is easy to cause the corrosion of the peripheral soldered circuit board position, resulting in the weakening or failure of the product function. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a new type capacitor rubber plug which is reasonable in structure and reliable in use, solves the problem of penetration corrosion of circuit board caused by residual electrolyte at the sealing position during the packaging of the existing capacitor, and prolongs the service life of the product.
[0005] The technical scheme of the utility model is:
[0006] A new type capacitor rubber plug, comprising a rubber plug body, two lead holes are symmetrically arranged on the rubber plug body, and the technical key points are that a plurality of flow guide grooves for facilitating cleaning are arranged on the edge of the upper surface of the rubber plug body, or a ring-shaped sealing reinforcing rib is arranged, the ring-shaped sealing reinforcing rib is higher than the upper surface of the rubber plug body, and a countersunk groove is arranged on the lower surface of the rubber plug body and surrounds the lead hole.
[0007] The new type capacitor rubber plug has the upper surface of the rubber plug body, the upper surface of the rubber plug body is provided with a boss, the outer edge of the boss is provided with a recessed surface corresponding to the position of the lead hole, a horizontal interval is left between the recessed surface and the lead hole, and a horizontal interval is left between the outer edge of the boss and the flow guide groove or the ring-shaped sealing reinforcing rib.
[0008] The new type capacitor rubber plug has the upper surface of the rubber plug body, the upper surface of the rubber plug body is provided with a boss, the outer edge of the boss is provided with a recessed surface corresponding to the position of the lead hole, a horizontal interval is left between the recessed surface and the lead hole, and a horizontal interval is left between the outer edge of the boss and the flow guide groove or the ring-shaped sealing reinforcing rib.
[0009] The new capacitor rubber plug has a set horizontal distance between the annular sealing reinforcing rib and the lead hole.
[0010] The new capacitor rubber plug has one sunken groove surrounding two lead holes, or two sunken grooves corresponding to the two lead holes.
[0011] The new capacitor rubber plug has an annular edge groove on the upper edge of the plug body, which is communicated with each flow guide groove, so that the flow guide groove can guide the cleaning liquid when the flow guide grooves are few, and the cleaning effect is ensured.
[0012] The new capacitor rubber plug has a flow guide groove with a width at the side opening greater than a width near the center line of the plug body, and the two side walls of the flow guide groove are straight walls or arc-shaped side walls, and the two arc-shaped side walls are convex to the opposite side, so that the use strength is ensured when the flow guide grooves are many, and the contact area with the aluminum shell seal is ensured.
[0013] The new capacitor rubber plug has a flow guide groove with a width at the side opening equal to a width near the center line of the plug body, and the two side walls of the flow guide groove are straight walls, which are suitable for the case of few flow guide grooves, ensure the use strength, and ensure the cleaning effect when cooperating with the annular edge groove.
[0014] The new capacitor rubber plug has a sunken groove in the shape of a horseshoe or a waist.
[0015] The new capacitor rubber plug has an annular sealing reinforcing rib with an arc-shaped cross-sectional top profile.
[0016] The beneficial effects of the new capacitor rubber plug are:
[0017] 1. The upper corner position of the aluminum shell seal, i.e. the weak sealing position, is easy to leave electrolyte during packaging, and the present application increases a plurality of flow guide grooves on the edge of the upper surface of the plug body, so that the cleaning liquid enters the upper corner position of the aluminum shell seal through each flow guide groove, the electrolyte remaining in the upper corner of the aluminum shell seal is cleaned thoroughly, the electrolyte is prevented from penetrating and corroding the circuit board, and the service life of the plug is prolonged.
[0018] 2. Another scheme of the present application is to provide an annular sealing reinforcing rib on the edge of the upper surface of the plug body, and during packaging, the annular sealing reinforcing rib is squeezed into the upper corner of the aluminum shell seal, so that the electrolyte is prevented from remaining in the upper corner of the aluminum shell seal, the electrolyte is prevented from penetrating and corroding the circuit board, and the service life of the plug is prolonged.
[0019] 3, the rubber plug body lower surface is equipped with the counterbore groove arranged around the lead hole, before the improvement, in the sealing process, the battery cell and the rubber plug body lower surface form a larger pressure to extrude the electrolyte into the lead hole, after the improvement, greatly reduce the electrolyte upwelling pressure, so as to prevent the electrolyte from entering the lead post and the lead hole, improve the sealing of the lead post and the lead hole, avoid the electrolyte permeation corrosion circuit board, so as to prolong the service life of the rubber plug.
[0020] 4, the rubber plug body of the utility model adds the boss, increases the use intensity, thereby improves the ability of resisting the deformation caused by the product internal gas production. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is the structure schematic view of the embodiment 1 of the utility model, and
[0022] Figure 2 is the lower surface schematic view of the embodiment 1 of the utility model, and
[0023] Figure 3 is the use state diagram of the embodiment 1 of the utility model, and
[0024] Figure 4 is the structure schematic view of the embodiment 2 of the utility model, and
[0025] Figure 5 is the longitudinal section view of the embodiment 2 of the utility model, and
[0026] Figure 6 is the structure schematic view of the embodiment 3 of the utility model, and
[0027] Figure 7 is the lower surface schematic view of the embodiment 3 of the utility model, and
[0028] Figure 8 is the structure schematic view of the embodiment 4 of the utility model.
[0029] In the drawing: 1. rubber plug body, 2. flow guide groove, 3. boss, 4. lead hole, 5. counterbore groove, 6. sealing upper round corner, 7. waist, 8. aluminum shell, 9. lead post, 10. annular sealing reinforcing rib, 11. annular edge groove. DETAILED DESCRIPTION
[0030] The utility model is described in detail according to the description drawing.
[0031] Embodiment 1, as Figures 1-3 shown, the novel capacitor rubber plug, including rubber plug body 1, the rubber plug body 1 is equipped with two lead holes 4 for lead post 9 to pass through on symmetry.
[0032] The middle of the upper surface of the rubber plug body 1 is provided with a boss 3, and the outer edge of the boss 3 is provided with a recessed surface corresponding to the position of the lead hole 4, and a horizontal interval is left between the recessed surface and the lead hole 4.
[0033] The edge of the upper surface of the rubber plug body 1 is uniformly provided with 12 flow guide grooves 2 for cleaning, and a horizontal interval is left between the outer edge of the boss 3 and the flow guide groove 2, and a horizontal interval is left between the flow guide groove 2 and the lead hole 4. The width of the side opening of the flow guide groove 2 is greater than the width near the center line of the rubber plug body 1, and the two side walls of the flow guide groove 2 are arc-shaped side walls, and the two arc-shaped side walls are convex to the opposite side.
[0034] The lower surface of the rubber plug body 1 is provided with a countersunk groove 5 arranged around the lead hole 4, and the number of the countersunk groove 5 is two, corresponding to the two lead holes 4. The countersunk groove 5 is horseshoe-shaped, and the depth of the countersunk groove 5 is greater than 0.3mm.
[0035] The material of the rubber plug body 1 is butyl rubber or ethylene-propylene-diene rubber, but is not limited to butyl rubber and ethylene-propylene-diene rubber.
[0036] Referring to Figure 3 , during packaging, the lead column 9 passes through the lead hole 4, the rubber plug body 1 is assembled with the aluminum shell 8, and the beam waist 7 and the sealing upper round corner 6 are formed by equipment packaging. The flow guide groove 2 is connected to the inside and outside of the sealing upper round corner 6, the cleaning liquid enters the inside of the sealing upper round corner 6 through each flow guide groove 2, and the residual electrolyte is cleaned.
[0037] As shown in Figure 4 , Figure 5 , the new capacitor rubber plug comprises a rubber plug body 1, and two lead holes 4 for lead columns are symmetrically arranged on the rubber plug body 1.
[0038] In this embodiment, the edge of the upper surface of the rubber plug body 1 is provided with an annular sealing reinforcing rib 10, and the annular sealing reinforcing rib 10 is higher than the upper surface of the rubber plug body 1. The cross section of the annular sealing reinforcing rib 10 is arc-shaped, and a horizontal interval is left between the annular sealing reinforcing rib 10 and the lead hole 4.
[0039] The middle of the upper surface of the rubber plug body 1 is provided with a boss 3, and the outer edge of the boss 3 is provided with a recessed surface corresponding to the position of the lead hole 4, and a horizontal interval is left between the recessed surface and the lead hole 4, and a horizontal interval is left between the outer edge of the boss 3 and the annular sealing reinforcing rib 10.
[0040] The lower surface of the rubber plug body 1 is provided with a countersunk groove 5 arranged around the lead hole 4, and the number of the countersunk groove 5 is two, corresponding to the two lead holes 4.
[0041] During encapsulation, the lead post 9 passes through the lead hole 4, the rubber plug body 1 is assembled with the aluminum shell 8, and the equipment encapsulation forms the waist 7 and the rounded corner 6 on the seal. At the same time, the annular sealing reinforcing rib 10 is squeezed into the rounded corner 6 on the seal to achieve a seal.
[0042] Example 3, as Figure 6 , Figure 7 As shown, the novel capacitor plug includes a plug body 1, on which two lead holes 4 are symmetrically provided for lead posts to pass through.
[0043] The rubber stopper body 1 has a boss 3 in the middle of its upper surface, and the outer edge of the boss 3 has a relief concave surface corresponding to the location of the lead hole 4. A set horizontal distance is left between the relief concave surface and the lead hole 4.
[0044] Four guide grooves 2 are evenly distributed along the edge of the upper surface of the rubber stopper body 1 to facilitate cleaning. A predetermined horizontal distance is maintained between the outer edge of the boss 3 and the guide grooves 2, and a predetermined horizontal distance is maintained between the guide grooves 2 and the lead hole 4. The width of the side opening of the guide groove 2 is equal to its width near the center line of the rubber stopper body 1, and the two side walls of the guide groove 2 are straight walls. To ensure the cleaning effect, an annular side groove 11 communicating with the four guide grooves 2 is provided on the upper outer edge of the rubber stopper body 1.
[0045] The lower surface of the rubber stopper body 1 is provided with a countersunk groove 5 arranged around the lead hole 4. There is one countersunk groove 5, which surrounds two lead holes 4. The countersunk groove 5 is waist-shaped.
[0046] Example 4, as Figure 8 As shown, the novel capacitor plug includes a plug body 1, on which two lead holes 4 are symmetrically provided for lead posts to pass through.
[0047] In this embodiment, 10 guide grooves 2 are evenly provided on the edge of the upper surface of the rubber stopper body 1 to facilitate cleaning. The width of the side opening of the guide groove 2 is greater than its width near the center line of the rubber stopper body 1, and the two side walls of the guide groove 2 are straight walls.
[0048] Everything else is the same as in Example 1.
[0049] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.
Claims
1. A novel capacitor rubber plug comprising a rubber plug body, two lead holes are symmetrically arranged on the rubber plug body, characterized in that: The upper surface of the rubber plug body is provided with a plurality of flow guide grooves for facilitating cleaning or a ring-shaped sealing reinforcing rib which is higher than the upper surface of the rubber plug body, and the lower surface of the rubber plug body is provided with a countersunk groove arranged around the lead hole.
2. A novel capacitor grommet according to claim 1, characterized in that: The upper surface of the rubber plug body is provided with a boss in the middle, the outer edge of the boss is provided with a recessed surface corresponding to the position of the lead hole, a horizontal interval is left between the recessed surface and the lead hole, and a horizontal interval is left between the outer edge of the boss and the flow guide groove or the ring-shaped sealing reinforcing rib.
3. A novel capacitor grommet as claimed in claim 1, wherein: A horizontal interval is left between the flow guide groove and the lead hole.
4. A new type of capacitor rubber plug according to claim 1, characterized in that: A horizontal interval is left between the ring-shaped sealing reinforcing rib and the lead hole.
5. A new type of capacitor rubber plug according to claim 1, characterized in that: The number of the countersunk groove is one, and the countersunk groove surrounds two lead holes, or the number of the countersunk groove is two, and the countersunk groove corresponds to the two lead holes one by one.
6. A new type of capacitor rubber plug according to claim 1, characterized in that: The upper part of the rubber plug body is provided with a ring-shaped edge groove in communication with each flow guide groove.
7. A new type of capacitor rubber plug according to claim 1, characterized by: The width of the side opening of the flow guide groove is greater than the width close to the center line of the rubber plug body, and the two side walls of the flow guide groove are straight walls or arc-shaped side walls, respectively, and the two arc-shaped side walls are convex to the opposite side.
8. A new type of capacitor rubber plug according to claim 1, characterized by: The width of the side opening of the flow guide groove is equal to the width close to the center line of the rubber plug body, and the two side walls of the flow guide groove are straight walls, respectively.
9. A new type of capacitor rubber plug according to claim 1, characterized by: The countersunk groove is horseshoe-shaped or waist-shaped.
10. A new type of capacitor rubber plug according to claim 1, characterized by: The cross-sectional top profile of the ring-shaped sealing reinforcing rib is arc-shaped.