Explosion-proof capacitor
By providing a curved surface buffer and notch release structure on the capacitor shell, the problem of poor buffering effect when the internal pressure of the capacitor increases is solved, and the explosion-proof capability of the capacitor is improved.
Patent Information
- Application Number
- CN202422576777.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-10-24
AI Technical Summary
When the internal pressure of existing capacitors increases, the buffering effect is poor, which can easily lead to explosion and affect surrounding components.
An explosion-proof capacitor is designed. A first curved surface and a second curved surface are provided on the shell as a buffer structure. A notch is provided on the upper side wall of the shell as a final release structure. The shell is made of aluminum, the pins are made of copper, and the gasket is made of rubber to enhance stability.
The design of curved surface buffering and notch release improves the pressure resistance of the capacitor and enhances its explosion-proof performance.
Smart Images
Figure CN223413947U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to an explosion-proof capacitor. Background Art
[0002] For some large-capacity electrolytic capacitors, when problems occur inside the capacitor, the internal pressure will increase, posing a certain risk of explosion. To prevent this explosion from affecting surrounding components, an existing solution is to create a notch on the top of the capacitor shell. The notch creates a fragile area on the top of the capacitor shell. When the internal pressure of the capacitor increases, the impact force can pass through the fragile area and cause the top of the capacitor shell to deform or break through, thereby achieving the effect of pressure buffering and directional blasting.
[0003] In this structure, since the buffer zone and the blast zone are located in the same location, the buffering effect is easily weakened during the process, resulting in poor buffering effect. Therefore, how to construct a capacitor structure with better buffering effect is a technical problem that needs to be studied urgently in the industry. Utility Model Content
[0004] The purpose of the present utility model is to provide an explosion-proof capacitor to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.
[0005] The utility model solves the technical problem by providing an explosion-proof capacitor, comprising a shell, a capacitor core, a positive electrode pin and a negative electrode pin;
[0006] The capacitor core is located inside the housing, and an installation space is provided inside the housing. The capacitor core is provided in the installation space, and the upper ends of the positive pin and the negative pin are both embedded in the installation space from the lower side wall of the housing. The upper end of the positive pin is connected to the positive electrode of the capacitor core, and the upper end of the negative pin is connected to the negative electrode of the capacitor core.
[0007] The upper side wall of the shell is provided with a notch; the front side surface of the outer peripheral wall of the shell is provided with a first curved surface curved toward the installation space; the rear side surface of the outer peripheral wall of the shell is provided with a second curved surface curved toward the installation space.
[0008] Furthermore, the first curved surface and the second curved surface are symmetrical to each other.
[0009] Furthermore, the positive electrode pin is a copper component.
[0010] Furthermore, the negative electrode pin is made of copper.
[0011] Furthermore, the explosion-proof capacitor also includes a positive plate and a negative plate, the positive electrode of the capacitor core is connected to the positive plate through conductive glue, the positive plate is connected to the upper end of the positive pin of the conductive glue, the negative electrode of the capacitor core is connected to the negative plate through conductive glue, and the negative plate is connected to the upper end of the negative pin through conductive glue.
[0012] Furthermore, the shell is made of aluminum.
[0013] Furthermore, the explosion-proof capacitor further includes a gasket, which is provided with a first through-hole and a second through-hole, the gasket contacts the lower side wall of the shell, the positive electrode pin passes through the first through-hole, and the negative electrode pin passes through the second through-hole.
[0014] Furthermore, the gasket is a rubber component.
[0015] Furthermore, the connection between the upper side wall of the shell and the outer peripheral wall of the shell is a chamfered structure.
[0016] Furthermore, the chamfered structure is an arc-shaped chamfered structure.
[0017] The beneficial effect of this utility model is that, by providing the first and second curved surfaces, the capacitor first buffers pressure during the pressure-bearing process through the first and second curved surfaces. When the buffering fails, the pressure is released by rupturing the notch in the upper side wall of the housing. Due to the buffering provided by the first and second curved surfaces, the pressure resistance of the entire capacitor is improved, thereby enhancing the explosion-proof capability of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief description of the drawings required for describing the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of them. Those skilled in the art can also derive other design solutions and drawings based on these drawings without inventive effort.
[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of an explosion-proof capacitor;
[0020] Figure 2 This is a top view of an explosion-proof capacitor;
[0021] Figure 3 It is a structural diagram of the cross-sectional structure of an explosion-proof capacitor;
[0022] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the capacitor core. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0024] It should be noted that although the system diagrams illustrate functional module divisions and the flowcharts illustrate logical sequences, in certain circumstances, the steps shown or described may be performed in a sequence that differs from the module divisions in the system or the sequence in the flowcharts. The terms "first," "second," and so on, in the specification, claims, and drawings, are used to distinguish similar items and are not necessarily used to describe a specific sequence or precedence.
[0025] refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 .in, Figure 1 It is a schematic diagram of the three-dimensional structure of an explosion-proof capacitor. Figure 2 This is a top view of an explosion-proof capacitor. Figure 3 It is a schematic diagram of the cross-sectional structure of an explosion-proof capacitor. Figure 4 It is a schematic diagram of the partial cross-sectional structure of the capacitor core.
[0026] The explosion-proof capacitor mainly provides a reasonable structure to make the capacitor have better explosion-proof capability and improve the reliability of the product.
[0027] In order to achieve this technical goal, the present application provides an explosion-proof capacitor, including: a shell 100, a capacitor core 200, a positive pin 101 and a negative pin 102.
[0028] The capacitor core 200 is located inside the shell 100, and an installation space 103 is provided inside the shell 100. The capacitor core 200 is arranged in the installation space 103. The upper end of the positive pin 101 and the upper end of the negative pin 102 are both embedded in the installation space 103 from the lower side wall of the shell 100. The upper end of the positive pin 101 is connected to the positive pole of the capacitor core 200, and the upper end of the negative pin 102 is connected to the negative pole of the capacitor core 200.
[0029] The housing 100 provides an installation space 103, so that the capacitor core 200 can be installed in the installation space 103. The positive pin 101 serves as a connection medium between the positive electrode of the capacitor core 200 and the outside world. Similarly, the negative pin 102 serves as a connection medium between the negative electrode of the capacitor core 200 and the outside world.
[0030] The upper end of the positive electrode pin 101 is embedded in the lower side wall of the housing 100, thereby penetrating into the installation space 103 and connecting to the positive electrode of the capacitor core 200. The upper end of the negative electrode pin 102 is embedded in the lower side wall of the housing 100, thereby penetrating into the installation space 103 and connecting to the negative electrode of the capacitor core 200.
[0031] When the external circuit needs to work, it can be connected to the capacitor core 200 by connecting to the exposed part of the positive pin 101 relative to the shell 100 and by connecting to the exposed part of the negative pin 102 relative to the shell 100.
[0032] The upper sidewall of the housing 100 is provided with a notch 130; the front side of the outer peripheral wall of the housing 100 is provided with a first curved surface 110 that curves toward the installation space 103; and the rear side of the outer peripheral wall of the housing 100 is provided with a second curved surface 120 that curves toward the installation space 103. In some further specific embodiments, the first curved surface 110 and the second curved surface 120 are symmetrical.
[0033] The first curved surface 110 and the second curved surface 120 form a certain buffering stress through bending. When the pressure in the installation space 103 is too high, the pressure first acts on the first curved surface 110 and the second curved surface 120, causing the first curved surface 110 and the second curved surface 120 to bend outward. During the outward bending of the first curved surface 110 and the second curved surface 120, they act as a buffer against the pressure. Of course, if the energy of the pressure at this time is completely consumed by the outward bending of the first curved surface 110 and the second curved surface 120, then the upper side wall of the housing 100 will not break.
[0034] Since the first curved surface 110 and the second curved surface 120 are not on the same plane as the notch 130, and the first curved surface 110 and the second curved surface 120 are not on the upper side wall of the shell 100, the upper side wall of the shell 100 only needs to consider how to release the pressure after the first curved surface 110 and the second curved surface 120 buffer the pressure. In this way, when the capacitor is under pressure, it will first be buffered by the first curved surface 110 and the second curved surface 120. When the buffer fails, the notch 130 on the upper side wall of the shell 100 will rupture and release. Due to the buffering of the first curved surface 110 and the second curved surface 120, the pressure resistance of the entire capacitor is improved. The explosion-proof capability of the capacitor is improved.
[0035] In some further specific embodiments, the explosion-proof capacitor also includes a positive plate 201 and a negative plate 202, the positive electrode of the capacitor core 200 is connected to the positive plate 201 through conductive glue, the positive plate 201 is connected to the upper end of the positive pin 101 through conductive glue, the negative electrode of the capacitor core 200 is connected to the negative plate 202 through conductive glue, and the negative plate 202 is connected to the upper end of the negative pin 102 through conductive glue.
[0036] The capacitor core 200 includes: a first composite film and a second composite film; the first composite film and the second composite film are rolled parallel to and in the same direction to form a capacitor roll shape.
[0037] The first composite film includes a first base film 310 , the surface of which is plated with a first metal layer 301 . The second composite film includes a second base film 320 , the surface of which is plated with a second metal layer 302 .
[0038] The first long side of the first metal layer 301 coincides with the first long side of the front side of the first base film 310, and a first vacant surface 311 is defined between the second long side of the first metal layer 301 and the second long side of the front side of the first base film 310. The first short side of the first metal layer 301 coincides with the first short side of the front side of the first base film 310, and the second short side of the first metal layer 301 coincides with the second short side of the front side of the first base film 310.
[0039] The first long side of the second metal layer 302 coincides with the second long side of the front side of the second base film 320, and a second vacant surface 322 is defined between the second long side of the second metal layer 302 and the first long side of the front side of the second base film 320. The first short side of the second metal layer 302 coincides with the first short side of the back side of the second base film 320, and the second short side of the second metal layer 302 coincides with the second short side of the back side of the second base film 320.
[0040] In the capacitor core 200 , the long sides of the plurality of first metal layers 301 form the positive electrode of the capacitor core 200 , and the long sides of the plurality of second metal layers 302 form the negative electrode of the capacitor core 200 .
[0041] The positive plate 201 is connected to the positive electrode of the capacitor core 200 through a conductive adhesive, and the negative plate 202 is connected to the negative electrode of the capacitor core 200 through a conductive adhesive.
[0042] In order to improve the conductivity of the positive pin 101, a material with high conductivity needs to be selected for the positive pin 101. Therefore, in some further specific embodiments, the positive pin 101 is made of copper.
[0043] In order to improve the conductivity of the negative pin 102, a material with high conductivity needs to be selected for the negative pin 102. Therefore, in some further specific embodiments, the negative pin 102 is made of copper.
[0044] In some further specific embodiments, the housing 100 is made of aluminum.
[0045] In order to enhance the stability of the capacitor during installation, in some further specific embodiments, the explosion-proof capacitor also includes a gasket, which is provided with a first through-hole and a second through-hole. The gasket contacts the lower side wall of the shell 100, and the positive pin 101 passes through the first through-hole, and the negative pin 102 passes through the second through-hole.
[0046] In some further specific embodiments, the gasket is a rubber component.
[0047] In order to make the housing 100 more rounded, in some further specific embodiments, the connection between the upper side wall of the housing 100 and the outer peripheral wall of the housing 100 is a chamfered structure, wherein the chamfered structure is an arc-shaped chamfered structure.
[0048] The above specifically describes the preferred embodiments of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. An explosion-proof capacitor, characterized in that: include: A housing (100), a capacitor core (200), a positive electrode pin (101), and a negative electrode pin (102); The capacitor core (200) is located inside the housing (100), and an installation space (103) is provided inside the housing (100). The capacitor core (200) is provided in the installation space (103), and the upper end of the positive electrode pin (101) and the upper end of the negative electrode pin (102) are both embedded in the installation space (103) from the lower side wall of the housing (100). The upper end of the positive electrode pin (101) is connected to the positive electrode of the capacitor core (200), and the upper end of the negative electrode pin (102) is connected to the negative electrode of the capacitor core (200); The upper side wall of the shell (100) is provided with a notch (130); the front side surface of the peripheral wall of the shell (100) is provided with a first curved surface (110) curved toward the installation space (103); and the rear side surface of the peripheral wall of the shell (100) is provided with a second curved surface (120) curved toward the installation space (103).
2. The explosion-proof capacitor according to claim 1, characterized in that: The first curved surface (110) and the second curved surface (120) are symmetrical to each other.
3. The explosion-proof capacitor according to claim 1, characterized in that: The positive electrode pin (101) is a copper component.
4. The explosion-proof capacitor according to claim 1, characterized in that: The negative electrode pin (102) is a copper component.
5. The explosion-proof capacitor according to claim 1, characterized in that: It also includes a positive plate (201) and a negative plate (202), wherein the positive electrode of the capacitor core (200) is connected to the positive plate (201) via conductive glue, and the positive plate (201) is connected to the upper end of the positive electrode pin (101) via the conductive glue, and the negative electrode of the capacitor core (200) is connected to the negative plate (202) via the conductive glue, and the negative plate (202) is connected to the upper end of the negative electrode pin (102) via the conductive glue.
6. The explosion-proof capacitor according to claim 1, characterized in that: The housing (100) is an aluminum component.
7. The explosion-proof capacitor according to claim 1, characterized in that: It also includes a gasket, which is provided with a first through-hole and a second through-hole, the gasket contacts the lower side wall of the housing (100), the positive electrode pin (101) passes through the first through-hole, and the negative electrode pin (102) passes through the second through-hole.
8. The explosion-proof capacitor according to claim 7, characterized in that: The gasket is a rubber component.
9. The explosion-proof capacitor according to claim 1, characterized in that: The connection between the upper side wall of the shell (100) and the outer peripheral wall of the shell (100) is a chamfered structure.
10. The explosion-proof capacitor according to claim 9, characterized in that: The chamfered structure is an arc-shaped chamfered structure.