CN212461416U - High-precision low-impedance capacitor - Google Patents
High-precision low-impedance capacitor Download PDFInfo
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- CN212461416U CN212461416U CN202021481775.2U CN202021481775U CN212461416U CN 212461416 U CN212461416 U CN 212461416U CN 202021481775 U CN202021481775 U CN 202021481775U CN 212461416 U CN212461416 U CN 212461416U
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- heat dissipation
- pad
- casing
- precision low
- interior casing
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Abstract
The utility model belongs to the technical field of electronic components and specifically relates to a high accuracy low impedance capacitor and specifically relates to a casing, it includes the casing, the casing is including the interior casing that is used for loading electrolyte, the outer shell body that is equipped with of inner shell body, leave the clearance between interior casing and the shell body. This application can make the difficult quilt of condenser damage, has the life's of extension condenser effect.
Description
Technical Field
The application relates to the field of electronic components, in particular to a high-precision low-impedance capacitor.
Background
A capacitor is an electronic component commonly used on circuit boards, and is capable of storing and discharging electric charges. Capacitors can be classified into electrolytic capacitors, ceramic capacitors, and the like, depending on the capacitor dielectric.
A common electrolytic capacitor includes a case and a cover connected to the case, wherein the cover is provided with a positive connection post and a negative connection post. The electrolytic capacitor further includes an electrolyte as a medium, a relatively closed space is formed between the case and the lid, and the electrolyte is loaded in the space between the case and the lid. When the positive connecting column and the negative connecting column are connected to the circuit board, voltage is applied between the positive connecting column and the negative connecting column, and the electrolytic capacitor can realize storage and release of charges.
Generally, a circuit board of a precision instrument needs to use an electrolytic capacitor with higher precision and smaller impedance, and in order to meet the requirement of the precision instrument on the electrolytic capacitor, the existing electrolytic capacitor with high precision and low impedance is provided. During the operation of the electrolytic capacitor, the ripple current can generate loss, so that the electrolytic capacitor releases heat, and the temperature of the electrolytic capacitor is increased. If the temperature of the electrolytic capacitor is continuously increased, the shell of the electrolytic capacitor is easy to crack due to thermal expansion, so that the electrolytic capacitor is damaged, and the service life of the electrolytic capacitor is influenced.
In view of the above-mentioned related art, the inventors consider that there is a drawback that the electrolytic capacitor is easily damaged and the service life is short.
SUMMERY OF THE UTILITY MODEL
In order to enable the capacitor not to be damaged easily and prolong the service life of the capacitor, the application provides a high-precision low-impedance capacitor.
The application provides a high accuracy low impedance capacitor adopts following technical scheme:
the utility model provides a high accuracy low impedance capacitor, includes the casing, the casing is including the interior casing that is used for loading electrolyte, the outer shell body that is equipped with of interior casing body, leave the clearance between interior casing and the shell body.
Through adopting above-mentioned technical scheme, through setting up interior casing and shell body, electrolyte loads in the interior casing, and the condenser can produce the heat in the interior casing of operation in-process, makes interior casing receive thermal expansion under high temperature. Because leave the clearance between interior outer wall of the shell body and the shell body inner wall, the clearance provides the space of activity for the inflation of interior casing, makes interior casing can take place deformation in the shell body to reduce the emergence of casing fracture condition, the protection condenser makes the difficult quilt of condenser damage, has extension condenser life's effect.
Preferably, a heat dissipation pad is arranged in a gap between the inner shell and the outer shell.
Through adopting above-mentioned technical scheme, the cooling pad has the radiating effect of promotion, can strengthen the radiating effect of interior casing, reduces the temperature of interior casing, makes interior casing be difficult for the thermal expansion more.
Preferably, the heat dissipation pad is a silica gel heat dissipation pad.
By adopting the technical scheme, the silica gel heat dissipation pad has the advantage of good heat dissipation performance, and the normal operation of the heat dissipation function of the heat dissipation pad can be ensured. And the silica gel heat dissipation pad has the advantages of good insulativity, good shock absorption and the like, and can more effectively protect the capacitor.
Preferably, the thermal conductivity of the thermal pad is greater than or equal to 3W/(m.k).
By adopting the technical scheme, the heat conductivity coefficient reflects the heat conductivity of the heat dissipation material, namely the heat dissipation performance. The higher the heat conductivity coefficient of the heat dissipation material is, the better the heat dissipation performance of the heat dissipation material is. The thermal conductivity of the heat dissipation pad is greater than or equal to 3W/(m.k), which means that the heat conduction pad has better heat conduction performance.
Preferably, the breakdown voltage of the heat dissipation pad is greater than or equal to 3 Kv/mm.
By adopting the technical scheme, the breakdown voltage reflects the insulating property of the heat dissipation material. The higher the breakdown voltage of the heat sink material, the better the insulating properties of the heat sink material. The breakdown voltage of the heat dissipation pad is greater than or equal to 3Kv/mm, which indicates that the heat conduction pad has better insulating property.
Preferably, the heat dissipation pad is provided with a first heat dissipation hole, the shell is provided with a second heat dissipation hole, and the first heat dissipation hole is communicated with the second heat dissipation hole.
Through adopting above-mentioned technical scheme, through setting up first louvre and second louvre, the heat on the interior casing can distribute away through first louvre and second louvre, is favorable to the further heat dissipation of interior casing to reach better radiating effect.
Preferably, the second heat dissipation hole is in a horn shape, and the aperture of the opening at one end, far away from the heat dissipation pad, of the second heat dissipation hole is larger than the aperture of the opening at one end, close to the heat dissipation pad, of the second heat dissipation hole.
Through adopting above-mentioned technical scheme, the second louvre of loudspeaker form can increase the aperture of second louvre contact air one end open-ended to increased the area of contact of second louvre and air, helped accelerating the exchange of interior casing and air heat, accelerated the thermal giving off, reached radiating purpose sooner.
Preferably, at least one pair of the first heat dissipation hole and the second heat dissipation hole is arranged.
Through adopting above-mentioned technical scheme, to a certain extent, the quantity of first louvre and second louvre is more, and the radiating of interior casing is faster, and the radiating effect of interior casing is better.
In summary, the present application includes at least one of the following beneficial technical effects:
through setting up interior casing and shell body, electrolyte loads in the interior casing, and the condenser can produce the heat in the interior casing of operation in-process, makes interior casing receive thermal expansion under high temperature. Because leave the clearance between interior outer wall of the shell body and the shell body inner wall, the clearance provides the space of activity for the inflation of interior casing, makes interior casing can take place deformation in the shell body to reduce the emergence of casing fracture condition, the protection condenser makes the difficult quilt of condenser damage, has extension condenser life's effect.
Through setting up the cooling pad, the cooling pad has the radiating effect of promotion, can strengthen the radiating effect of interior casing, reduces the temperature of interior casing, makes interior casing be difficult for the thermal expansion more.
Through setting up first louvre and second louvre, the heat on the interior casing can distribute away through first louvre and second louvre, is favorable to the further heat dissipation of interior casing to reach better radiating effect.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a high-precision low-impedance capacitor according to an embodiment of the present application;
fig. 2 is a schematic cross-sectional structural view of a high-precision low-impedance capacitor according to an embodiment of the present application.
Description of reference numerals: 1. a housing; 11. an inner housing; 12. an outer housing; 121. a second heat dissipation hole; 2. a cover body; 21. a sealing part; 22. an installation part; 3. a positive connecting column; 4. a negative connecting column; 5. a heat dissipation pad; 51. a first heat dissipation hole.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses a high-precision low-impedance capacitor. Referring to fig. 1, the high-precision low-impedance capacitor includes a case 1, and an electrolyte (not shown) is loaded in the case 1. The top of the shell 1 is connected with a cover body 2, and the cover body 2 is provided with a positive connecting post 3 and a negative connecting post 4. After the positive connecting column 3 and the negative connecting column 4 are connected to the circuit board, voltage is applied between the positive connecting column 3 and the negative connecting column 4, so that the capacitor can realize storage and release of charges.
Referring to fig. 2, the housing 1 includes an inner housing 11, the inner housing 11 has a hollow structure, one end of the inner housing 11 is open, the opening communicates with the inside of the inner housing 11, and an electrolyte is loaded in the inner housing 11.
The housing 1 further comprises an outer housing 12, the outer housing 12 is also hollow, and one end of the outer housing 12 is open and the opening is communicated with the inside of the outer housing 12. The outer shell 12 is sleeved outside the inner shell 11, and a gap is reserved between the inner wall of the outer shell 12 and the outer wall of the inner shell 11.
The cover body 2 covers one open end of the shell 1, the cover body 2 comprises a sealing part 21 and an installation part 22 connected to one surface of the sealing part 21, the sealing part 21 is matched with the outer wall of the outer shell 12, and the installation part 22 is matched with the inside of the inner shell 11.
When the cover 2 is fitted to the open end of the case 1, the fitting portion 22 is fitted into the open end of the inner case 11, the inside of the inner case 11 is sealed, the electrolyte is stored in the inner case 11, and the sealing portion 21 and the outer wall of the outer case 12 are formed in a substantially cylindrical shape.
During operation of the capacitor heat is generated in the inner housing 11, causing the inner housing 11 to thermally expand at high temperatures. Because leave the clearance between 11 outer walls in the interior casing and the 12 inner walls in shell body, the clearance provides the space of activity for the inflation of interior casing 11, makes interior casing 11 can take place deformation in outer casing 12 to reduce the emergence of the 1 condition of ftractureing of casing, the protection condenser makes the condenser be difficult for being damaged, has extension condenser life's effect.
In order to improve the heat dissipation effect of the inner housing 11, a heat dissipation pad 5 is disposed in a gap between the outer wall of the inner housing 11 and the inner wall of the outer housing 12, and preferably, the heat dissipation pad 5 is a silica gel heat dissipation pad. The heat dissipation pad 5 is filled between the outer wall of the inner shell 11 and the inner wall of the outer shell 12, and two side surfaces of the heat dissipation pad 5 are respectively attached to the outer wall of the inner shell 11 and the inner wall of the outer shell 12. The thermal conductivity of the thermal pad 5 is 3W/(m.k). The heat dissipation pad 5 has an effect of promoting heat dissipation, and can enhance the heat dissipation effect of the inner housing 11, reduce the temperature of the inner housing 11, and make the inner housing 11 more difficult to expand by heat.
Description of the drawings: a dielectric loses its dielectric properties as a conductor under a sufficiently strong electric field, called dielectric breakdown, and the corresponding voltage is called breakdown voltage.
The capacitor is continuously operated at high temperature, and is easily damaged due to insulation breakdown in addition to being easily damaged due to thermal expansion and contraction cracking, and thus it is required to improve the insulation performance of the capacitor. In contrast, the breakdown voltage of the thermal pad 5 in this embodiment is 3Kv/mm, so that the thermal pad 5 has better insulating property.
It should be noted that the thermal conductivity of the thermal pad 5 in this embodiment is 3W/(m · k), and the breakdown voltage is 3Kv/mm, but the thermal pad 5 with different performance parameters can be reasonably selected according to the temperature of the capacitor usage environment, the production cost, and other factors, so that the thermal conductivity of the thermal pad 5 is greater than 3W/(m · k), and the breakdown voltage is greater than 3Kv/mm, for example, the thermal conductivity of the thermal pad 5 is 3.5W/(m · k) or 4W/(m · k), and the breakdown voltage is 4Kv/mm or 5 Kv/mm.
In a preferred embodiment, four first heat dissipation holes 51 are formed on the sidewall of the heat dissipation pad 5, the four first heat dissipation holes 51 are uniformly distributed around the heat dissipation pad 5 at the middle portion of the heat dissipation pad 5, and the first heat dissipation holes 51 penetrate through the heat dissipation pad 5.
Correspondingly, the outer casing 12 is provided with a second heat dissipation hole 121 matching with the first heat dissipation hole 51, the second heat dissipation hole 121 is equal to the first heat dissipation hole 51, and the first heat dissipation hole 51 corresponds to the second heat dissipation hole 121 one by one. The first heat dissipating holes 51 are uniformly distributed around the outer housing 12 at the middle portion of the outer housing 12, the second heat dissipating holes 121 penetrate through the outer housing 12, and the first heat dissipating holes 51 are communicated with the second heat dissipating holes 121, so that the inner housing 11 is communicated with the outside air through the first heat dissipating holes 51 and the second heat dissipating holes 121.
The arrangement of the first heat dissipation hole 51 and the second heat dissipation hole 121 enables the heat in the inner housing 11 to be dissipated through the first heat dissipation hole 51 and the second heat dissipation hole 121, which is beneficial to further heat dissipation of the inner housing 11, thereby achieving better heat dissipation effect.
Further, set up second louvre 121 to loudspeaker form, second louvre 121 keeps away from 5 one end open-ended apertures of cooling pad and is greater than the aperture that second louvre 121 is close to 5 one end open-ended apertures of cooling pad, also it is bigger that second louvre 121 contacts outside air one end open-ended aperture, can increase the area of contact of second louvre 121 and air, help accelerating the exchange of interior casing 11 and air heat for thermal giving off reaches radiating purpose more fast.
The implementation principle of the high-precision low-impedance capacitor in the embodiment of the application is as follows: on one hand, when the inner shell 11 is expanded by heat at high temperature, the inner shell 11 can expand and deform in the gap between the inner shell 11 and the outer shell 12, and the outer shell 12 can limit the inner shell 11 from deforming excessively, thereby reducing the occurrence of cracking of the shell 1. On the other hand, the heat on the inner housing 11 can be dissipated through the heat dissipation pad 5, the first heat dissipation hole 51 and the second heat dissipation hole 121, and in addition, the heat dissipation pad 5 also has the effect of limiting the deformation of the inner housing 11, so that the inner housing 11 is more difficult to crack due to thermal expansion, and the service life of the capacitor is greatly prolonged.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A high-precision low-impedance capacitor is characterized in that: including casing (1), casing (1) is including interior casing (11) that are used for loading electrolyte, interior casing (11) are equipped with shell body (12) outward, leave the clearance between interior casing (11) and shell body (12).
2. A high precision low impedance capacitor according to claim 1 wherein: a heat dissipation pad (5) is arranged in a gap between the inner shell (11) and the outer shell (12).
3. A high precision low impedance capacitor according to claim 2 wherein: the heat dissipation pad (5) is a silica gel heat dissipation pad.
4. A high precision low impedance capacitor according to claim 3 wherein: the heat conductivity coefficient of the heat dissipation pad (5) is greater than or equal to 3W/(m.k).
5. A high precision low impedance capacitor according to claim 4 wherein: the breakdown voltage of the heat dissipation pad (5) is greater than or equal to 3 Kv/mm.
6. A high precision low impedance capacitor according to claim 2 wherein: the heat dissipation pad (5) is provided with a first heat dissipation hole (51), the outer shell (12) is provided with a second heat dissipation hole (121), and the first heat dissipation hole (51) is communicated with the second heat dissipation hole (121).
7. A high precision low impedance capacitor according to claim 6 wherein: the second heat dissipation hole (121) is in a horn shape, and the aperture of the second heat dissipation hole (121) far away from the opening at one end of the heat dissipation pad (5) is larger than the aperture of the second heat dissipation hole (121) close to the opening at one end of the heat dissipation pad (5).
8. A high precision low impedance capacitor according to claim 7 wherein: at least one pair of the first heat dissipation hole (51) and the second heat dissipation hole (121) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021481775.2U CN212461416U (en) | 2020-07-23 | 2020-07-23 | High-precision low-impedance capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021481775.2U CN212461416U (en) | 2020-07-23 | 2020-07-23 | High-precision low-impedance capacitor |
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| Publication Number | Publication Date |
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| CN212461416U true CN212461416U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021481775.2U Active CN212461416U (en) | 2020-07-23 | 2020-07-23 | High-precision low-impedance capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3126278A1 (en) | 2021-08-20 | 2023-02-24 | Psa Automobiles Sa | ELECTRICAL DEVICE PROTECTED AGAINST LIQUID SPRAYS |
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2020
- 2020-07-23 CN CN202021481775.2U patent/CN212461416U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3126278A1 (en) | 2021-08-20 | 2023-02-24 | Psa Automobiles Sa | ELECTRICAL DEVICE PROTECTED AGAINST LIQUID SPRAYS |
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