Capacitor shell and capacitor
By using a multi-layered capacitor casing design, including a vacuum chamber, heat radiation protection, and heat insulation sleeve, the problem of electrolyte condensation in aluminum electrolytic capacitors at low temperatures is solved, ensuring the normal operation of the capacitors in low-temperature environments.
Patent Information
- Application Number
- CN202422646389.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Existing aluminum electrolytic capacitors suffer from capacitance decay, increased impedance, and poor response due to electrolyte condensation at low temperatures, affecting the performance of capacitors and electronic equipment.
The capacitor housing adopts a multi-layer structure, including a first housing, a second housing, a vacuum chamber, a heat radiation shielding sleeve, and a heat insulation sleeve, which reduces heat conduction, heat convection, and heat radiation, and improves thermal insulation performance.
Effectively prevents electrolyte condensation, ensures capacitors operate normally in low-temperature environments, maintains capacitance, impedance, and response performance, and guarantees the performance of electronic equipment.
Smart Images
Figure CN223566441U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of capacitor technology, and in particular to a capacitor housing and a capacitor. Background Technology
[0002] As one of the three major passive components, capacitors are widely used in various electronic products. With the increasing variety of applications and performance improvements in electronic products, the requirements for capacitors are also constantly increasing. Existing aluminum electrolytic capacitors generally consist of a bushing, aluminum shell, cover plate, core, and electrolyte. In applications such as outdoor use in northern winters, cold storage warehouses, and refrigerated logistics vehicles, capacitors need to operate in low-temperature environments. However, when the ambient temperature is too low, the electrolyte inside the capacitor will solidify, affecting its contact area and wettability with the electrode foil. This leads to a significant decrease in capacitance, an increase in impedance and ESR (equivalent series resistance), and a deterioration in response, greatly impacting the performance of the capacitor and the corresponding electronic equipment. Utility Model Content
[0003] In view of the problems existing in the background art, this application provides a capacitor housing and a capacitor. The capacitor housing has good heat preservation function and is suitable for use in low temperature environment. It can effectively avoid the phenomenon of large capacity decay, increased impedance and ESR value, and poor response caused by the freezing of electrolyte in the capacitor, thus ensuring the performance of the capacitor and corresponding electronic equipment.
[0004] According to one aspect of the present invention, a capacitor housing is provided, comprising: a first housing; a cover plate connected to one opening end of the first housing; and a cavity structure disposed outside the first housing, separating the first housing from the outside.
[0005] In some embodiments of this utility model, a second shell is sleeved on the outside of the first shell, and the cavity structure is formed by the second shell and the first shell being spaced apart.
[0006] In some embodiments of this utility model, two or more second shells are sleeved on the outside of the first shell; the cavity structure is formed by the interval between the innermost second shell and the first shell and / or by the interval between at least one pair of adjacent second shells.
[0007] In some embodiments of this utility model, the cavity structure is a vacuum chamber.
[0008] In some embodiments of this utility model, the outer wall of the first housing is provided with a heat radiation shielding sleeve.
[0009] In some embodiments of this utility model, the outer wall of the second housing is provided with a heat insulation sleeve.
[0010] In some embodiments of this utility model, the cover plate includes: a first cover body, which is sealed to one end of the opening of the first housing; a second cover body, which is sealed to one end of the opening of the second housing; and a connector, which connects the first cover body and the second cover body.
[0011] In some embodiments of this utility model, the first cover and the second cover are spaced apart.
[0012] In some embodiments of this utility model, a sealing ring is provided between the first cover and the first housing and / or between the second cover and the second housing.
[0013] According to another aspect of the present invention, a capacitor is provided, comprising the capacitor housing described above.
[0014] This invention provides a capacitor housing, upon which a capacitor is encapsulated. This housing provides an aluminum electrolytic capacitor suitable for use in low-temperature environments. The housing includes a first shell, a second shell, an I-shaped cover, a heat-shielding sleeve, and a heat-insulating sleeve. When the capacitor is used in a low-temperature environment, the heat-insulating sleeve, the heat-shielding sleeve, and the vacuum chamber between the first and second shells reduce heat conduction, convection, and radiation between the capacitor and the surrounding environment. This reduces the efficiency of the three major heat transfer pathways, providing heat insulation and improving the capacitor's operating temperature. It effectively prevents electrolyte condensation, significant capacitance decay, increased impedance and ESR values, and poor response, ensuring the performance of the capacitor and related electronic equipment. Attached Figure Description
[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0016] Figure 1 This is a schematic diagram of the overall structure of the capacitor shell of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the cover plate of this utility model.
[0018] The reference numerals in the attached drawings represent the following: 10, sealing ring; 20, cover plate; 30, second housing; 40, first housing; 50, heat radiation shielding sleeve; 60, heat insulation sleeve; 70, core package; 80, cavity structure; 90, lead-out terminal. Detailed Implementation
[0019] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.
[0020] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0021] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.
[0022] This utility model discloses a capacitor casing. For example... Figure 1 As shown, the capacitor housing includes a first housing 40, a cover plate 20, and a cavity structure 80. The cover plate 20 is connected to one end of the opening of the first housing 40, and the cavity structure 80 is located on the outside of the first housing 40, separating the first housing 40 from the outside.
[0023] In this invention, the cavity structure 80 located outside the first housing 40 separates the first housing 40 (and the core package 70 and electrolyte installed inside the first housing 40) from the outside environment, thereby reducing the heat conduction between the first housing 40 and the external atmosphere. This provides good heat preservation and is suitable for use in low-temperature environments. It effectively reduces the significant capacity decay, increased impedance and ESR values, and poor response caused by the freezing of the electrolyte in the capacitor, thus ensuring the performance of the capacitor and the corresponding electronic equipment.
[0024] In some embodiments of this utility model, such as Figure 1 As shown, a second housing 30 is sleeved on the outside of the first housing 40, and a cavity structure 80 is formed between the second housing 30 and the first housing 40 at an interval.
[0025] It should be understood that the inner diameter of the second housing 30 is larger than the outer diameter of the first housing 40, and the length of the second housing 30 is appropriately longer than the length of the first housing 40, so that after the second housing 30 is coaxially sleeved on the first housing 40, a certain gap can be formed between the periphery and the outer bottom of the first housing 40 and the inner side of the second housing 30.
[0026] By adding a second shell 30 to the outside of the first shell 40, and sealing one end of the second shell 30 after it is fitted onto the first shell 40, a cavity structure 80 with good stability can be formed on the outside of the first shell 40. This structure is not only good for heat preservation and frost protection, but also simple in structure and low in cost.
[0027] In some embodiments of this utility model, two or more second shells 30 may be sleeved on the outside of the first shell 40, and a cavity structure 80 is formed by spacing the innermost second shell 30 and the first shell 40 and / or spacing at least one pair of adjacent second shells 30.
[0028] In some embodiments of this utility model, the number of second housings 30 and the position of the cavity structure 80 formed by the gap are not particularly limited, and those skilled in the art can make reasonable choices according to actual needs.
[0029] Furthermore, the cavity structure 80 is preferably disposed directly in a position close to the first housing 40.
[0030] As some specific examples, for instance, two second housings 30 can be fitted over the outside of the first housing 40, with the inner diameter and length of the first second housing 30 being larger than the inner diameter and length of the first housing 40, and the inner diameter and length of the second second housing 30 being larger than the inner diameter and length of the first second housing 30, so that after the two second housings 30 are fitted over the first housing 40, a certain gap is formed between the first second housing 30 and the first housing 40, and a certain gap is formed between the second second housing 30 and the first second housing 30.
[0031] In some embodiments of this utility model, the cavity structure 80 is a vacuum chamber.
[0032] It should be noted that vacuum chambers include, but are not limited to, being encapsulated in a vacuum environment or formed by evacuation.
[0033] By setting the cavity structure 80 as a vacuum chamber, the amount of gas inside the cavity structure 80 can be significantly reduced, thereby further reducing the heat exchange between the first shell 40 and the outside world, and further improving the heat preservation and antifreeze performance of the capacitor.
[0034] In some embodiments of this utility model, the primary purpose of the first housing 40 is to seal the internal core 70 and electrolyte of the capacitor. To prevent impurities in the first housing 40 from affecting the performance of the capacitor, the material of the first housing 40 has certain requirements for purity and halogen content. The primary purpose of the second housing 30 is to provide a sealed environment, and the requirements for purity and halogen content of the material of the second housing 30 are lower.
[0035] In some embodiments of this utility model, such as Figure 1 As shown, the outer wall of the first housing 40 is provided with a heat radiation shielding sleeve 50.
[0036] Preferably, the heat radiation shielding sleeve 50 is in close contact with the first housing 40.
[0037] By providing a heat radiation shielding sleeve 50 on the outer wall of the first housing 40, such as the outer side wall and the outer bottom wall of the first housing 40, the heat radiation of the first housing 40 and its internal structure can be reduced, and the possibility of electrolyte condensation can be further reduced.
[0038] In some embodiments of this utility model, in order to reduce the radiative heat dissipation of the first housing 40 and meet the insulation requirements, the heat radiation protection sleeve 50 may be a thinner white insulating sleeve.
[0039] In some embodiments of this utility model, such as Figure 1 As shown, the outer wall of the second housing 30 is provided with a heat insulation sleeve 60.
[0040] Preferably, the heat insulation sleeve 60 is in close contact with the second housing 30.
[0041] By providing a heat insulation sleeve 60 on the outer wall of the second housing 30, such as the outer side wall and the outer bottom wall of the second housing 30, the heat convection of the second housing 30 can be reduced, which can further reduce the possibility of electrolyte condensation.
[0042] In some embodiments of this utility model, in order to minimize the contact between the second housing 30 and the outside world and reduce heat convection and heat conduction, the heat insulation sleeve 60 of the second housing 30 may be made of thicker heat insulation material.
[0043] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the cover plate 20 includes a first cover body, a second cover body, and a connector. The first cover body is sealed to one end of the opening of the first housing 40, and the second cover body is sealed to one end of the opening of the second housing 30. The connector connects the first cover body and the second cover body.
[0044] By setting a first cover that fits the opening of the first housing 40 and a second cover that fits the opening of the second housing 30, and connecting the first cover and the second cover with a connector, an overall structure of the cover plate 20 can be formed. The second cover can also be used to fix the position of the first cover through the connector, so that the position of the first housing 40 relative to the second housing 30 remains fixed, thereby obtaining a cavity structure 80 with a stable gap.
[0045] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the first cover and the second cover are spaced apart.
[0046] By setting the first cover and the second cover at intervals and selecting appropriate connector sizes to connect the first cover and the second cover, the coverage area of the cavity structure 80 can be further increased, and the heat preservation and antifreeze performance can be improved.
[0047] It should be noted that the number of second covers is not particularly limited. Those skilled in the art can make reasonable selections based on the number of second housings 30. For example, if there is one second housing 30, one second cover and one first cover can form an I-shaped cover plate 20; or if there are two second housings 30, two second covers and one first cover can form a king-shaped cover plate 20.
[0048] In some embodiments of this utility model, the cover plate 20 may be made of epoxy resin or EPDM rubber, etc.
[0049] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, a sealing ring 10 is provided between the first cover and the first housing 40 and / or between the second cover and the second housing 30.
[0050] Preferably, sealing rings 10 are provided between the first cover and the first housing 40 and between the second cover and the second housing 30, respectively.
[0051] The sealing ring 10 ensures the sealed installation of the core package 70, electrolyte, etc. inside the first housing 40, and also ensures the sealing performance of the cavity structure 80.
[0052] In some embodiments of this utility model, the sealing ring 10 may be an elastic rubber ring.
[0053] In some embodiments of this utility model, the first housing 40 can achieve a sealing effect with the first cover by rolling and pressing the sealing rubber ring, and the second housing 30 can achieve a sealing effect with the second cover by rolling and pressing the sealing rubber ring.
[0054] This invention also proposes a capacitor that includes the capacitor housing described above.
[0055] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the capacitor also includes a core 70 and an electrolyte disposed within the first housing 40, as well as lead-out terminals 90 disposed on the cover plate 20.
[0056] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A capacitor casing, characterized in that, include: First shell; A cover plate is connected to one end of the opening of the first housing; a cavity structure is located on the outside of the first housing, separating the first housing from the outside. A second shell is fitted outside the first shell, and the cavity structure is formed by the spaced arrangement between the second shell and the first shell; or, two or more second shells are fitted outside the first shell; the cavity structure is formed by the spaced arrangement between the innermost second shell and the first shell and / or between at least one pair of adjacent second shells. The cover plate includes: a first cover body, which is sealed to one end of the opening of the first housing; a second cover body, which is sealed to one end of the opening of the second housing; and a connector, which connects the first cover body and the second cover body.
2. The capacitor casing according to claim 1, characterized in that, The cavity structure is a vacuum chamber.
3. The capacitor casing according to claim 1, characterized in that, The outer wall of the first housing is provided with a heat radiation shielding sleeve.
4. The capacitor casing according to claim 1, characterized in that, The outer wall of the second housing is provided with a heat insulation sleeve.
5. The capacitor casing according to claim 1, characterized in that, The first cover and the second cover are spaced apart.
6. The capacitor casing according to claim 1, characterized in that, A sealing ring is provided between the first cover and the first housing and / or between the second cover and the second housing.
7. A capacitor, characterized in that, Includes the capacitor housing as described in any one of claims 1 to 6.