An installation structure and installation method for an explosion-proof valve of a capacitor cover plate

Abstract

The present invention discloses an installation structure and installation method for an explosion-proof valve of a capacitor cover plate, which relates to the field of capacitor assembly. It includes a capacitor main body, a cover plate is arranged at the top of the capacitor main body, and an explosion-proof valve main body is arranged inside the cover plate. An inner tube is arranged inside the explosion-proof valve main body, and a rotating tube is connected to the outside of the inner tube. An outer tube is arranged outside the rotating tube, and a first gear is connected to the bottom end of the rotating tube. By using a cover plate without the explosion-proof valve main body installed, the capacitor main body is first sealed, then aged, and finally the explosion-proof valve main body is inserted into the cover plate. In this way, the problems of open aging and closed aging can be solved simultaneously. Compared with the traditional process, the post-installation valve process has one more operation step of inserting the valve, but it avoids the problem of product defects caused by aging due to sealing of the capacitor main body, greatly improves the first-pass yield of the capacitor, reduces the generation of waste products, and lowers the production cost.

Description

Technical Field

[0001] The present invention relates to the field of capacitor assembly, and particularly to an installation structure and installation method for an explosion-proof valve of a capacitor cover plate. Background Art

[0002] A capacitor is an element that stores electric charge and electrical energy (electric potential energy). A conductor system in which one conductor is surrounded by another conductor, or all the electric field lines emitted by one conductor terminate on another conductor, is called a capacitor.

[0003] There are two traditional production processes for capacitor assembly: open aging and closed aging. The disadvantage of open aging is that during the sealing process, due to the high-speed rotation of the sealing machine, it is possible to drive the cover plate to rotate, damaging the oxide film protection layer at the top of the aluminum foil in the core package, thereby increasing the leakage current of the capacitor, reducing the service life of the capacitor, and posing a safety hazard. The disadvantage of closed aging is that since the sealing is done first, the possibly damaged oxide film protection layer will be repaired during the aging process. However, during the aging process, the temperature is high, and the electrolyte is prone to generating various gases such as hydrogen, increasing the internal pressure of the capacitor, also posing a safety hazard (if it is open aging, the gas will directly escape and there will be no pressure increase). Summary of the Invention

[0004] The purpose of the present invention is to solve the problems that there are two traditional production processes for capacitor assembly: open aging and closed aging. The disadvantage of open aging is that during the sealing process, due to the high-speed rotation of the sealing machine, it is possible to drive the cover plate to rotate, damaging the oxide film protection layer at the top of the aluminum foil in the core package, thereby increasing the leakage current of the capacitor, reducing the service life of the capacitor, and posing a safety hazard. The disadvantage of closed aging is that since the sealing is done first, the possibly damaged oxide film protection layer will be repaired during the aging process. However, during the aging process, the temperature is high, and the electrolyte is prone to generating various gases such as hydrogen, increasing the internal pressure of the capacitor, also posing a safety hazard (if it is open aging, the gas will directly escape and there will be no pressure increase), and to provide an installation structure and installation method for an explosion-proof valve of a capacitor cover plate.

[0005] To achieve the above object, the present invention provides the following technical solutions: A capacitor cover explosion-proof valve installation structure and installation method, including a capacitor main body, a cover is provided at the top of the capacitor main body, and an explosion-proof valve main body is provided inside the cover. An inner tube is provided inside the explosion-proof valve main body, and a rotating tube is connected to the outside of the inner tube. An outer tube is provided outside the rotating tube, and a first gear is connected to the bottom end of the rotating tube. A fixing ring is provided at the bottom end of the outer tube, and a second gear is connected to the inside of the fixing ring. A blade is connected to one side of the second gear. A first sealing block is provided inside the rotating tube, and a slider is connected to the inside of the rotating tube above the first sealing block. A chute is provided on the outside of the inner tube, and a second sealing block is provided on the outside of the rotating tube. An anti-slip layer is provided above the second sealing block on the outside of the rotating tube. A fixing block is provided between the inner tube and the outer tube, and a bolt is provided inside the fixing block.

[0006] Preferably, the capacitor main body is fixedly connected to the cover, and through holes are provided at the top of the cover. The number of the through holes is two groups, and the number of the explosion-proof valve main bodies is two groups. Both groups of the explosion-proof valve main bodies penetrate through the through holes and extend into their interiors.

[0007] Preferably, the chute and the slider are matched, the cover and the rotating tube are rotationally connected through the chute and the slider. A second chute is provided above the second sealing block on the outside of the rotating tube, and a second slider matched with the second chute is provided inside the outer tube. The rotating tube and the outer tube are rotationally connected through the second chute and the second slider.

[0008] Preferably, the inner tube and the outer tube are fixedly connected through the fixing block, and the number of the fixing blocks is two groups. Both groups of the fixing blocks are located above the rotating tube.

[0009] Preferably, the first gear meshes with the second gear, and the number of the second gears is multiple groups. All multiple groups of the second gears are rotationally connected to the fixing ring. The number of the blades is multiple groups. All multiple groups of the blades are rotationally connected to the fixing ring. The first gear is fixedly connected to the rotating tube.

[0010] Preferably, the number of both the first sealing block and the second sealing block is three groups. All three groups of the first sealing block and the second sealing block are of an integral structure with the rotating tube. Sealing grooves matched with the sealing blocks are provided inside both the inner tube and the outer tube, and the sealing blocks are movably connected to the sealing grooves.

[0011] Preferably, the anti-slip layer is of an integral structure with the rotating tube. The number of the bolts is two groups. Both groups of the bolts penetrate through the fixing block and extend into the interior of the inner tube. Threaded holes matched with the bolts are provided inside all of the inner tube, the rotating tube, and the outer tube.

[0012] Preferably, it includes the following steps:

[0013] Step 1: Install the cover plate on the top of the capacitor body, seal it for aging. After the aging is completed, insert the explosion-proof valve body into the cover plate to complete the installation of the cover plate and the explosion-proof valve body.

[0014] Step 2: After the explosion-proof valve body enters the cover plate, rotate the rotating tube. The rotating tube will rotate under the action of the chute and the slider. At this time, since the outer tube is in interference connection with the cover plate, the outer tube is fixed at the top of the cover plate. The outer tube is fixed to the inner tube through the fixing block, so the only rotatable part inside the explosion-proof valve body is the rotating tube. Rotate the rotating tube through the anti-slip layer. After the rotating tube rotates, it will drive the first gear to rotate. The first gear meshes with the second gear, so the second gear also starts to rotate. A set of second gears drives a set of blades to rotate. The multiple sets of blades rotate, causing the originally bowl-shaped blades to open into an impeller shape, and its diameter becomes larger, larger than the through hole at the top of the cover plate. Therefore, the explosion-proof valve body is clamped inside the cover plate, preventing the explosion-proof valve body from detaching from the cover plate.

[0015] Step 3: Turn the bolt. The bolt extends into the fixing block, the outer tube, the rotating tube, and the inner tube. After tightening, it can limit the rotation of the rotating tube to prevent the rotating tube from rotating and achieve the locking purpose.

[0016] Step 4: A first sealing block is provided between the inner tube and the rotating tube, and an anti-slip layer is provided between the rotating tube and the outer tube. The first sealing block, the chute, the slider, and the second sealing block can form a labyrinth seal between the inner tube, the rotating tube, and the outer tube, effectively preventing the electrolyte inside the capacitor body from leaking out.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention uses a cover plate without an installed explosion-proof valve body to first seal the capacitor body and then age it. Finally, the explosion-proof valve body is inserted into the cover plate. In this way, the problems of open aging and closed aging can be solved simultaneously. Compared with the traditional process, the post-installation valve process has one more operation step of inserting the valve, but it avoids the product defect problems caused by aging due to sealing of the capacitor body, greatly improves the first-pass yield of the capacitor, reduces the generation of waste products, and lowers the production cost.

[0019] 2. After the explosion-proof valve body is driven into the cover plate, the present invention realizes a self-locking structure for the explosion-proof valve body by rotating the rotating pipe through the capacitor body, cover plate, explosion-proof valve body, inner pipe, rotating pipe, outer pipe, first gear, fixed ring, second gear, blade, first sealing block, chute, slider, second sealing block, anti-slip layer, fixed block, and bolt, effectively avoiding the problem of the explosion-proof valve body separating from the cover plate later. By setting the first sealing block and the second sealing block, the sealing effect between the cover plate and the explosion-proof valve body is also greatly enhanced, effectively avoiding leakage and improving the product safety to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of the present invention;

[0021] Figure 2 is a schematic structural diagram of the explosion-proof valve of the present invention;

[0022] Figure 3 is a schematic structural diagram of the rotating pipe of the present invention;

[0023] Figure 4 is of the present invention Figure 1 enlarged view of the structure at A;

[0024] Figure 5 is a front view of the present invention.

[0025] In the figure: 1. Capacitor body; 2. Cover plate; 3. Explosion-proof valve body; 4. Inner pipe; 5. Rotating pipe; 6. Outer pipe; 7. First gear; 8. Fixed ring; 9. Second gear; 10. Blade; 11. First sealing block; 12. Chute; 13. Slider; 14. Second sealing block; 15. Anti-slip layer; 16. Fixed block; 17. Bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The embodiments of the present invention will be described below according to its overall structure.

[0028] Please refer to Figures 1-5 , a capacitor cover explosion-proof valve installation structure and installation method, including a capacitor body 1, a cover 2 is provided at the top of the capacitor body 1, and an explosion-proof valve body 3 is provided inside the cover 2. An inner tube 4 is provided inside the explosion-proof valve body 3, and a rotating tube 5 is connected to the outside of the inner tube 4. An outer tube 6 is provided outside the rotating tube 5, and a first gear 7 is connected to the bottom end of the rotating tube 5. A fixing ring 8 is provided at the bottom end of the outer tube 6, and a second gear 9 is connected to the inside of the fixing ring 8. A blade 10 is connected to one side of the second gear 9. A first sealing block 11 is provided inside the rotating tube 5, and a slider 13 is connected to the inside of the rotating tube 5 above the first sealing block 11. A chute 12 is provided on the outside of the inner tube 4. A second sealing block 14 is provided on the outside of the rotating tube 5, and an anti-slip layer 15 is provided above the second sealing block 14 on the outside of the rotating tube 5. A fixing block 16 is provided between the inner tube 4 and the outer tube 6, and a bolt 17 is provided inside the fixing block 16.

[0029] In the present invention, by providing a capacitor body 1, a cover plate 2, an explosion-proof valve body 3, an inner tube 4, a rotating tube 5, an outer tube 6, a first gear 7, a fixing ring 8, a second gear 9, blades 10, a first sealing block 11, a chute 12, a slider 13, a second sealing block 14, an anti-slip layer 15, a fixing block 16, and a bolt 17, after the explosion-proof valve body 3 is driven into the cover plate 2, a self-locking structure can be obtained for the explosion-proof valve body 3 by rotating the rotating tube 5, effectively avoiding the problem that the explosion-proof valve body 3 and the cover plate 2 are separated later. By providing the first sealing block 11 and the second sealing block 14, the sealing effect between the cover plate 2 and the explosion-proof valve body 3 is also greatly enhanced, effectively avoiding leakage, and improving the product safety to a certain extent.

[0030] Please refer specifically to Figure 1 , the capacitor body 1 is fixedly connected to the cover plate 2, and through holes are provided at the top of the cover plate 2. The number of through holes is two groups, and the number of explosion-proof valve bodies 3 is two groups. Both groups of explosion-proof valve bodies 3 penetrate through the through holes and extend into their interiors.

[0031] In the present invention, the capacitor body 1 needs to be installed with the cover plate 2 first. After aging, there are no through holes for installing the explosion-proof valve body 3 at the top of the cover plate 2 at this time.

[0032] Please refer specifically to Figure 1 , the chute 12 and the slider 13 are matched. The cover plate 2 and the rotating tube 5 are rotationally connected through the chute 12 and the slider 13. A second chute is provided above the second sealing block 14 on the outer side of the rotating tube 5, and a second slider matched with the second chute is provided on the inner side of the outer tube 6. The rotating tube 5 and the outer tube 6 are rotationally connected through the second chute and the second slider.

[0033] In the present invention, in addition to enabling the normal rotation of the rotating tube 5 with the inner tube 4 and the outer tube 6, the chute 12 and the slider 13 can also cooperate with the first sealing block 11, the second sealing block 14, and the sealing grooves matched with them to form a labyrinth seal, which can effectively prevent the internal electrolyte from leaking out and greatly improve the sealing effect.

[0034] Please refer specifically to Figure 2 , the inner tube 4 and the outer tube 6 are fixedly connected through the fixing block 16, and the number of fixing blocks 16 is two groups. Both groups of fixing blocks 16 are located above the rotating tube 5.

[0035] In the present invention, the fixing block 16 does not contact the rotating tube 5. The rotating tube 5 can be rotated normally, and the fixing block 16 does not pose an obstacle.

[0036] Please refer specifically to Figure 4, the first gear 7 meshes with the second gear 9, and the number of the second gears 9 is multiple groups. All the multiple groups of the second gears 9 are rotatably connected to the fixed ring 8. The number of the blades 10 is multiple groups. All the multiple groups of the blades 10 are rotatably connected to the fixed ring 8. The first gear 7 is fixedly connected to the rotating pipe 5.

[0037] In the present invention, the blades also rotate following the rotation of the second gear 9. When the blades 10 rotate, they will gradually open. When the multiple groups of the blades 10 enter the inside of the cover plate 2, they are in a bowl-shaped structure. When the rotating pipe 5 is rotated, the blades 10 will open to form an impeller shape and the diameter becomes larger. Thus, a block is formed at the bottom end of the cover plate 2 to prevent the cover plate 2 from separating from the explosion-proof valve body 3.

[0038] Please refer specifically to Figure 1 , the number of the first sealing blocks 11 and the second sealing blocks 14 is three groups each. All the three groups of the first sealing blocks 11 and the second sealing blocks 14 are of an integral structure with the rotating pipe 5. Sealing grooves matching the sealing blocks are provided inside both the inner pipe 4 and the outer pipe 6, and the sealing blocks are movably connected to the sealing grooves.

[0039] In the present invention, the sizes of the sealing blocks are different, causing changes in the thickness and diameter of the inner pipe 4, the rotating pipe 5, and the outer pipe 6. The three pipes cooperate with each other and have good sealing performance.

[0040] Please refer specifically to Figure 1 and Figure 2 , the anti-slip layer 15 is of an integral structure with the rotating pipe 5. The number of the bolts 17 is two groups. The two groups of bolts 17 penetrate through the fixing block 16 and extend into the inside of the inner pipe 4. Threaded holes matching the bolts 17 are provided inside the inner pipe 4, the rotating pipe 5, and the outer pipe 6.

[0041] In the present invention, the bolts 17 are used to lock the rotating pipe 5 to prevent the rotating pipe 5 from rotating continuously.

[0042] Please refer specifically to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , including the following steps:

[0043] Step 1: Install the cover plate 2 on the top end of the capacitor body 1, seal it and age it. After the aging is completed, drive the explosion-proof valve body 3 into the inside of the cover plate 2 to complete the installation of the cover plate 2 and the explosion-proof valve body 3;

[0044] Step 2: After the explosion-proof valve body 3 enters the inside of the cover plate 2, rotate the rotating pipe 5. The rotating pipe 5 will rotate under the action of the sliding groove 12 and the slider 13. At this time, since the outer pipe 6 is in interference connection with the cover plate 2, the outer pipe 6 is fixed at the top of the cover plate 2. The outer pipe 6 is fixed to the inner pipe 4 through the fixing block 16. Therefore, the rotating pipe 5 inside the explosion-proof valve body 3 can rotate. Rotate the rotating pipe 5 through the anti-slip layer 15. After the rotating pipe 5 rotates, it will drive the first gear 7 to rotate. The first gear 7 meshes with the second gear 9. Therefore, the second gear 9 also starts to rotate. A set of second gears 9 drives a set of blades 10 to rotate. Multiple sets of blades 10 rotate, causing the blades 10 that were originally in a bowl-shaped structure to open into an impeller shape, and its diameter becomes larger, and the diameter is larger than the through hole at the top of the cover plate 2. Therefore, the explosion-proof valve body 3 is clamped inside the cover plate 2, avoiding the situation where the explosion-proof valve body 3 is separated from the cover plate 2;

[0045] Step 3: Turn the bolt 17. The bolt 17 extends into the inside of the fixing block 16, the outer pipe 6, the rotating pipe 5, and the inner pipe 4. After tightening, the rotating pipe 5 can be limited to prevent the rotating pipe 5 from rotating, achieving the locking purpose;

[0046] Step 4: A first sealing block 11 is provided between the inner pipe 4 and the rotating pipe 5, and an anti-slip layer 15 is provided between the rotating pipe 5 and the outer pipe 6. The first sealing block 11, the sliding groove 12, the slider 13, and the second sealing block 14 can form a labyrinth seal between the inner pipe 4, the rotating pipe 5, and the outer pipe 6, effectively preventing the electrolyte inside the capacitor body 1 from leaking out.

[0047] The comparison between the capacitor with a traditional explosion-proof valve installation and the capacitor with a later-installed explosion-proof valve is shown in the figure (the traditional capacitor is Comparative Example 1, and the capacitor with a later-installed explosion-proof valve is Comparative Example 2):

[0048]

[0049] It can be seen from the comparison that the first-pass yield of the capacitor with a traditional explosion-proof valve installation is lower than that of the capacitor with a later-installed explosion-proof valve, and the loss rate is higher. When the battery life is at 70°C, 120°C, -40°C, and -90°C respectively, the capacitor with a later-installed explosion-proof valve has a longer service time, which also means that its safety is higher.

[0050] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An installation structure of an explosion-proof valve for a capacitor cover plate, comprising a capacitor body (1), characterized in that: A cover plate (2) is provided at the top of the capacitor body (1), and an explosion-proof valve body (3) is provided inside the cover plate (2). An inner tube (4) is provided inside the explosion-proof valve body (3), and a rotating tube (5) is connected to the outside of the inner tube (4). An outer tube (6) is provided outside the rotating tube (5), and a first gear (7) is connected to the bottom end of the rotating tube (5). A fixing ring (8) is provided at the bottom end of the outer tube (6), and a second gear (9) is connected to the inside of the fixing ring (8). A blade (10) is connected to one side of the second gear (9). A first sealing block (11) is provided inside the rotating tube (5), and a slider (13) is connected to the inside of the rotating tube (5) above the first sealing block (11). A chute (12) is provided on the outside of the inner tube (4). A second sealing block (14) is provided on the outside of the rotating tube (5), and an anti-slip layer (15) is provided above the second sealing block (14) on the outside of the rotating tube (5). A fixing block (16) is provided between the inner tube (4) and the outer tube (6), and a bolt (17) is provided inside the fixing block (16); The chute (12) and the slider (13) are matched with each other. The cover plate (2) and the rotating tube (5) are rotationally connected through the chute (12) and the slider (13). The inner tube (4) and the outer tube (6) are fixedly connected through the fixing block (16). The first gear (7) meshes with the second gear (9). The number of the first sealing blocks (11) and the second sealing blocks (14) is three groups each. The three groups of the first sealing blocks (11) and the second sealing blocks (14) are all of an integral structure with the rotating tube (5). Sealing grooves matched with the sealing blocks are provided inside the inner tube (4) and the outer tube (6), and the sealing blocks are movably connected with the sealing grooves; The anti-slip layer (15) is of an integral structure with the rotating tube (5). The number of the bolts (17) is two groups. The two groups of the bolts (17) penetrate through the fixing block (16) and extend into the inner tube (4). Threaded holes matched with the bolts (17) are provided inside the inner tube (4), the rotating tube (5), and the outer tube (6).

2. The installation structure of an explosion-proof valve for a capacitor cover plate according to claim 1, characterized in that: The capacitor body (1) is fixedly connected with the cover plate (2), and through holes are provided at the top end of the cover plate (2). The number of the through holes is two groups. The number of the explosion-proof valve bodies (3) is two groups. The two groups of the explosion-proof valve bodies (3) all penetrate through the through holes and extend into their interiors.

3. The explosion-proof valve mounting structure of a capacitor cover plate according to claim 1, wherein: A second chute is provided above the second sealing block (14) on the outside of the rotating tube (5). A second slider matched with the second chute is provided inside the outer tube (6). The rotating tube (5) and the outer tube (6) are rotationally connected through the second chute and the second slider.

4. The explosion-proof valve mounting structure of a capacitor cover plate according to claim 1, characterized in that: The number of the fixing blocks (16) is two groups. The two groups of the fixing blocks (16) are both located above the rotating tube (5).

5. The explosion-proof valve mounting structure of a capacitor cover plate according to claim 1, characterized in that: There are multiple sets of the second gears (9), and multiple sets of the second gears (9) are all rotatably connected to the fixed ring (8). There are multiple sets of the blades (10), and multiple sets of the blades (10) are all rotatably connected to the fixed ring (8). The first gear (7) is fixedly connected to the rotating tube (5).

Images