Chip tantalum electrolytic capacitor with aging protection structure

Abstract

The utility model discloses a chip tantalum electrolytic capacitor with an aging protection structure, which belongs to the technical field of capacitors and comprises a capacitor body, a metal shell arranged on the outer side of the capacitor body, a positioning mechanism arranged between the metal shell and the capacitor body, and radiating fins uniformly arranged on two sides of the metal shell. A filling groove is formed in the top of the metal shell, a drying agent is filled in the filling groove, an air hole is formed between the bottom of the filling groove and the metal shell, and an air inlet hole communicated with the outside is formed in the outer side of the filling groove. According to the tantalum capacitor, the metal shell is arranged outside the capacitor body, so that electromagnetism can be shielded in the use process, interference of an external electromagnetic field on the tantalum capacitor is reduced, influence of electromagnetic stress on the performance of the tantalum capacitor is reduced, in addition, the radiating fins are arranged outside the metal shell, the radiating rate inside the metal shell can be increased, and the service life of the tantalum capacitor is prolonged. Heat generated when the capacitor body works is quickly dissipated, and the influence of temperature on aging of the capacitor body is reduced.

Description

Technical Field

[0001] The utility model relates to a chip-type tantalum electrolytic capacitor, in particular to a chip-type tantalum electrolytic capacitor with an aging protection structure, belonging to the technical field of capacitors. Background Art

[0002] Tantalum capacitor aging refers to the phenomenon that its performance gradually declines with the change of time and working conditions during use. Tantalum capacitor aging may be manifested as reduced capacity, increased ESR, increased leakage current, etc., which will reduce the performance and stability of the circuit and may even cause circuit failure. Tantalum capacitor aging protection can effectively extend the service life of tantalum capacitors and improve the reliability and stability of the entire circuit system. However, tantalum capacitors are currently encapsulated in resin, which cannot isolate external electromagnetic interference during use, and humid air in the environment can easily enter the interior of the tantalum capacitor, causing corrosion and aging;

[0003] Therefore, a chip tantalum electrolytic capacitor with an aging protection structure is designed to optimize the above problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a chip tantalum electrolytic capacitor with an aging protection structure. By arranging a metal shell on the outside of the capacitor body, electromagnetic shielding can be performed during use, reducing the interference of the external electromagnetic field on the tantalum capacitor, and reducing the influence of electromagnetic stress on its performance. In addition, by arranging heat dissipation fins on the outside of the metal shell, the heat dissipation rate inside the metal shell can be accelerated, and the heat generated when the capacitor body is working can be quickly dissipated, reducing the influence of temperature on its aging. By arranging a filling groove on the top of the metal shell, and filling the inside of the filling groove with a desiccant, and then connecting the inside and outside of the metal shell through the air inlet and the air vent, the gas entering the inside of the metal shell can be dehumidified during use, ensuring that the tantalum capacitor is in a dry environment, and effectively reducing the aging caused by environmental influences.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A chip-type tantalum electrolytic capacitor with an aging protection structure comprises a capacitor body, a metal shell is arranged on the outside of the capacitor body, a positioning mechanism is arranged between the metal shell and the capacitor body, heat dissipation fins are evenly arranged on both sides of the metal shell, a filling groove is arranged on the top of the metal shell, the interior of the filling groove is filled with a desiccant, an air vent is arranged between the bottom of the filling groove and the metal shell, an air inlet hole connected to the outside is opened on the outside of the filling groove, a filling port is arranged on the top of the filling groove, and a cover plate is hingedly installed at one end of the filling port.

[0007] Preferably, an elastic clamping plate is provided at one end of the cover plate away from the hinge, and the shape of the elastic clamping plate is V-shaped.

[0008] Preferably, the heat dissipation fins are parallel to the horizontal plane, and the heat dissipation fins extend to the inside of the metal shell.

[0009] Preferably: a pad is fixed to the inner top of the metal shell, and a gap is left between the top of the capacitor body and the inner top of the metal shell.

[0010] Preferably: the positioning mechanism includes a notch groove, a card cover, a card strip and a card slot, the notch groove is opened at the bottom of both sides of the metal shell, the inner top of the notch groove is hingedly installed with a card cover, the bottom end of the inner side of the card cover is fixed with a card strip, and both sides of the capacitor body are opened with a card slot matching the card strip.

[0011] Preferably: a strip buckle groove is provided at the bottom of the outer side of the card cover, and the strip buckle groove is along the length direction of the card cover.

[0012] Preferably: the bottom ends of the metal shell and the card cover are both provided with sealing strips, and the bottom ends of the metal shell and the card cover are located in the same horizontal plane.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides a chip tantalum electrolytic capacitor with an aging protection structure. By arranging a metal shell on the outside of the capacitor body, electromagnetic shielding can be performed during use, reducing the interference of the external electromagnetic field on the tantalum capacitor and reducing the influence of electromagnetic stress on its performance. In addition, by arranging heat dissipation fins on the outside of the metal shell, the heat dissipation rate inside the metal shell can be accelerated, the heat generated by the capacitor body when working can be quickly dissipated, and the influence of temperature on its aging can be reduced.

[0015] A filling groove is provided on the top of the metal shell, and the interior of the filling groove is filled with a desiccant. The inside and outside of the metal shell are connected through the air inlet and the air vent, so that during use, the gas entering the inside of the metal shell can be dehumidified to ensure that the tantalum capacitor is in a dry environment, effectively reducing the aging caused by environmental influences. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the exploded structure diagram of the utility model;

[0017] Figure 2 It is a front cross-sectional view of the utility model;

[0018] Figure 3 It is a side sectional view of the utility model;

[0019] Figure 4 It is the front view of the utility model.

[0020] In the figure: 1. capacitor body; 2. metal shell; 3. notch; 4. card cover; 5. card strip; 6. card slot; 7. heat dissipation fin; 8. filling slot; 9. air inlet; 10. air vent; 11. filling port; 12. cover plate; 13. elastic card plate. DETAILED DESCRIPTION

[0021] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0022] like Figure 1-Figure 4 As shown, this embodiment provides a chip tantalum electrolytic capacitor with an aging protection structure, including a capacitor body 1, a metal shell 2 is provided on the outside of the capacitor body 1, a positioning mechanism is provided between the metal shell 2 and the capacitor body 1, heat dissipation fins 7 are evenly provided on both sides of the metal shell 2, a filling groove 8 is provided on the top of the metal shell 2, the filling groove 8 is filled with a desiccant, an air vent 10 is provided between the bottom of the filling groove 8 and the metal shell 2, an air inlet 9 connected to the outside is opened on the outside of the filling groove 8, a filling port 11 is provided on the top of the filling groove 8, and a cover plate 12 is hingedly installed at one end of the filling port 11.

[0023] Overall working principle: When in use, first weld the capacitor body 1 to the circuit board, then align the opening at the bottom of the metal shell 2 with the top of the capacitor body 1, then put the metal shell 2 on the outside of the capacitor body 1, and use the positioning mechanism to stabilize the position of the metal shell 2. In the process, the shielding effect of the metal shell 2 is used to effectively reduce electromagnetic interference. In addition, the heat dissipation fins 7 accelerate the heat dissipation inside the metal shell 2. In addition, when external air enters the interior of the metal shell 2, it needs to first enter the interior of the filling slot 8 through the air inlet 9, and after the gas is dried, it enters the interior of the metal shell 2 through the air vent 10, ensuring that the capacitor body 1 is in a dry environment.

[0024] In this embodiment, an elastic clamping plate 13 is provided at one end of the cover plate 12 away from the hinge, and the shape of the elastic clamping plate 13 is V-shaped.

[0025] Partial working principle: When the cover plate 12 is clamped on the filling port 11 , the elastic force of the elastic clamping plate 13 is utilized to ensure the sealing stability of the cover plate 12 .

[0026] In this embodiment, the heat dissipation fins 7 are parallel to the horizontal plane, and the heat dissipation fins 7 extend to the inside of the metal housing 2 .

[0027] Partial working principle: Multiple groups of heat dissipation fins 7 penetrate the metal shell 2, thereby improving the speed and effect of heat conduction.

[0028] In this embodiment, a spacer is fixed to the inner top of the metal shell 2 , and a gap is left between the top of the capacitor body 1 and the inner top of the metal shell 2 .

[0029] Partial working principle: the top of the capacitor body 1 does not fit the top of the metal shell 2, which will not block the air hole 10, thus ensuring the air permeability effect.

[0030] In this embodiment, the positioning mechanism includes a notch groove 3, a card cover 4, a card strip 5 and a card slot 6. The notch groove 3 is opened at the bottom of both sides of the metal shell 2. The inner top of the notch groove 3 is hingedly installed with a card cover 4. The bottom end of the inner side of the card cover 4 is fixed with a card strip 5. Card slots 6 cooperating with the card strip 5 are opened on both sides of the capacitor body 1.

[0031] Partial working principle: After the metal shell 2 is put on the outside of the capacitor body 1, the card cover 4 is turned over, and the card strip 5 on the card cover 4 is inserted into the inside of the card slot 6 to stabilize the position of the card cover 4, thereby fixing the position of the metal shell 2.

[0032] In this embodiment, a strip-shaped buckle groove is formed at the bottom of the outer side of the card cover 4 , and the strip-shaped buckle groove is along the length direction of the card cover 4 .

[0033] Partial working principle: During the process of disassembling the metal shell 2, the provision of the strip buckle groove can facilitate the insertion of tools therein, and then the metal shell 2 can be pried open.

[0034] In this embodiment, sealing strips are disposed at the bottom ends of the metal housing 2 and the card cover 4 , and the bottom ends of the metal housing 2 and the card cover 4 are located at the same horizontal plane.

[0035] Partial working principle: After the metal shell 2 is stuck on the outside of the capacitor body 1, the sealing strip at the bottom thereof contacts the circuit board, thereby ensuring the sealing effect of the metal shell 2.

[0036] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A chip tantalum electrolytic capacitor with an aging protection structure, comprising a capacitor body (1), characterized in that: A metal shell (2) is provided on the outside of the capacitor body (1), a positioning mechanism is provided between the metal shell (2) and the capacitor body (1), heat dissipation fins (7) are evenly provided on both sides of the metal shell (2), a filling groove (8) is provided on the top of the metal shell (2), the interior of the filling groove (8) is filled with a desiccant, an air vent (10) is provided between the bottom of the filling groove (8) and the metal shell (2), an air inlet (9) connected to the outside is provided on the outside of the filling groove (8), a filling port (11) is provided on the top of the filling groove (8), and a cover plate (12) is hingedly mounted at one end of the filling port (11).

2. The chip tantalum electrolytic capacitor with an aging protection structure according to claim 1, characterized in that: An elastic clamping plate (13) is provided at one end of the cover plate (12) away from the hinged portion, and the elastic clamping plate (13) is in a V-shape.

3. The chip tantalum electrolytic capacitor with an aging protection structure according to claim 1, characterized in that: The heat dissipation fins (7) are parallel to the horizontal plane, and the heat dissipation fins (7) extend to the inside of the metal shell (2).

4. The chip-type tantalum electrolytic capacitor with an aging protection structure according to claim 1, characterized in that: A cushion block is fixed to the inner top of the metal shell (2), and a gap is left between the top of the capacitor body (1) and the inner top of the metal shell (2).

5. The chip-type tantalum electrolytic capacitor with an aging protection structure according to claim 1, characterized in that: The positioning mechanism comprises a notch groove (3), a card cover (4), a card strip (5) and a card groove (6); the notch groove (3) is arranged at the bottom of both sides of the metal shell (2); the card cover (4) is hingedly mounted on the inner top of the notch groove (3); the card strip (5) is fixed to the bottom of the inner side of the card cover (4); and card grooves (6) cooperating with the card strip (5) are arranged on both sides of the capacitor body (1).

6. The chip-type tantalum electrolytic capacitor with an aging protection structure according to claim 5, characterized in that: The bottom of the outer side of the card cover (4) is provided with a strip buckle groove, and the strip buckle groove is along the length direction of the card cover (4).

7. The chip-type tantalum electrolytic capacitor with an aging protection structure according to claim 5, characterized in that: The bottom ends of the metal shell (2) and the card cover (4) are both provided with sealing strips, and the bottom ends of the metal shell (2) and the card cover (4) are located at the same horizontal plane.

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