Horizontal SMD (Surface Mount Device) vehicle-mounted capacitor

Abstract

The utility model discloses a horizontal surface-mounted vehicle-mounted capacitor, which comprises a capacitor body and a capacitor seat plate, the capacitor body comprises an aluminum shell, a capacitor cover plate and a leading-out terminal led out from the capacitor cover plate; the capacitor seat plate is sleeved at the cover plate end of the capacitor body; wherein the base plate is provided with a cavity for accommodating the cover plate end of the capacitor body, and the depth of the cavity is set to be larger than or equal to the thickness of the capacitor cover plate and smaller than half of the length of the capacitor body. The horizontal SMD vehicle-mounted capacitor can be stably installed and fixed on a circuit board, so that shaking caused by vibration of a vehicle is avoided, and the horizontal SMD vehicle-mounted capacitor can adapt to various complex application environments of jolting and vibration.

Description

Technical Field

[0001] This utility model belongs to the field of electronic device technology, and in particular relates to a horizontal surface mount automotive capacitor. Background Technology

[0002] Surface mount aluminum electrolytic capacitors are typically installed using surface mount technology (SMT) equipment, which securely solders the capacitors onto the circuit board. This method is particularly suitable for highly automated production lines and component-intensive manufacturing processes, significantly reducing labor costs and minimizing insertion errors that can occur with manual component handling. However, compared to manual operation, surface mount capacitor installation requires higher vibration resistance.

[0003] Especially as surface-mount aluminum electrolytic capacitors have begun to be widely used in the automotive industry, the vibration and impact indicators in the original industry standards for aluminum electrolytic capacitors can no longer meet the requirements of the automotive industry, and higher requirements have been placed on the shock resistance of capacitors.

[0004] However, the surface mount capacitors currently used in new energy vehicles do not adequately consider the installation and fixing issues. They are simply soldered to the circuit board with the positive and negative terminals. During long-term use of the vehicle, the capacitor is prone to shaking due to the bumps and vibrations of the car. Over time, this shaking can eventually cause the positive and negative terminals to loosen or be damaged, thus affecting the lifespan of the capacitor product.

[0005] Therefore, it is necessary to conduct research and development on the existing technologies to provide a solution that allows capacitors to be stably and securely mounted on circuit boards to adapt to complex application environments with various bumps and vibrations.

[0006] The above background information is provided only to assist in understanding the utility model concept and technical solution of this utility model, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0007] The purpose of this invention is to provide a horizontal patch-type vehicle capacitor to solve at least one of the problems mentioned above in the background section.

[0008] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows:

[0009] A horizontal surface mount automotive capacitor includes a capacitor body and a capacitor base plate; the capacitor body includes an aluminum shell, a capacitor cover plate, and lead-out terminals extending from the capacitor cover plate; the capacitor base plate is sleeved on the cover plate end of the capacitor body; wherein the base plate is provided with a cavity for accommodating the cover plate end of the capacitor body, the cavity being configured such that the depth of the cavity is greater than or equal to the thickness of the capacitor cover plate, and less than half the length of the capacitor body.

[0010] In some embodiments, the lead-out terminal includes an extension extending perpendicular to the capacitor cover plate, a bent portion bent from the end of the extension, and a welded portion extending perpendicularly from the end of the bent portion; the capacitor base plate includes a base plate body, the thickness of the base plate body being less than or equal to the length of the extension of the lead-out terminal, and the base plate body being provided with a slot that mates with the extension of the lead-out terminal, a terminal guide groove that accommodates the bent portion of the lead-out terminal, and a terminal welding placement groove for placing the welded portion of the lead-out terminal.

[0011] In some embodiments, the inner diameter of the cavity is equal to the outer diameter of the capacitor body, and the outer wall of the capacitor body is in complete contact with the inner wall of the cavity.

[0012] In some embodiments, the diameter of the bent portion of the lead-out terminal is adapted to the width of the terminal guide groove; the surface of the bent portion is flush with the outer surface of the base plate body.

[0013] In some embodiments, the bent portion is bent in a direction away from the center of the capacitor cover plate and parallel to the surface of the capacitor cover plate.

[0014] In some embodiments, the slot is configured to penetrate the inner surface and the outer surface of the base plate body, and the terminal guide groove is connected to the slot.

[0015] In some embodiments, a plurality of support arms are vertically extended along the periphery of the inner surface of the seat body, and the inner sides of the plurality of support arms enclose the cavity for accommodating the capacitor.

[0016] In some embodiments, the slots are symmetrically arranged with the center line of the outer surface of the base plate body as the center, and the terminal guide slots are symmetrically arranged on both sides of the outer surface of the base plate body.

[0017] In some embodiments, the plurality of support arms includes a first support arm, a second support arm, a third support arm, and a fourth support arm; wherein the first support arm, the second support arm, and the third support arm are located on one half of the seat plate body, while the fourth support arm is located on the other half of the seat plate body.

[0018] In some embodiments, a notch is provided between the first support arm and the third support arm and the fourth support arm, and the notch is higher than the inner surface of the seat plate body.

[0019] The beneficial effects of this utility model's technical solution are:

[0020] Compared with existing technologies, the horizontal patch automotive capacitor of this invention can be stably mounted and fixed on the circuit board, avoiding shaking due to vehicle vibration and adapting to complex application environments with various bumps and vibrations. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of a horizontal patch automotive capacitor according to an embodiment of the present invention;

[0023] Figure 2 This is a partially exploded schematic diagram of a horizontal patch automotive capacitor according to an embodiment of the present invention;

[0024] Figure 3 This is a three-dimensional schematic diagram of the capacitor base plate of a horizontal patch automotive capacitor according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram from another angle of the capacitor base plate of a horizontal patch automotive capacitor according to an embodiment of this utility model;

[0026] Figure 5 This is another angle schematic diagram of the capacitor base plate of the horizontal patch vehicle capacitor according to an embodiment of this utility model;

[0027] Figure 6 This is a three-dimensional schematic diagram of the capacitor body of a horizontal patch automotive capacitor according to an embodiment of the present invention. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer and more understandable, and to enable those skilled in the art to better understand the solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0029] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, "multiple" means two or more. Terms such as "installed," "connected," "joined," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Reference Figures 1-6As shown in the figure, as an embodiment of the present invention, a horizontal surface mount automotive capacitor is provided, including a capacitor body 100 and a capacitor base plate 200; the capacitor body 100 includes an aluminum shell 1, a core package installed in the aluminum shell 1, a capacitor cover plate 2 for encapsulating the core package in the aluminum shell, and lead-out terminals 21 extending from the capacitor cover plate 2; the capacitor base plate 200 is sleeved on the cover plate end of the capacitor body 100; wherein, the lead-out terminals 21 include an extension portion 210 extending perpendicularly to the capacitor cover plate, and an extension portion 210 extending from the capacitor cover plate 210. The extension 210 has a bent portion 211 at the end and a welded portion 212 that extends vertically from the end of the bent portion 211; the capacitor base plate 200 includes a base plate body 10, the thickness of the base plate body 10 is less than or equal to the length of the extension 210 of the lead-out terminal, and the base plate body 10 is provided with a slot 101 that mates with the extension 210 of the lead-out terminal, a terminal guide groove 102 that accommodates the bent portion 211 of the lead-out terminal, and a terminal welding placement groove 103 that places the welded portion 212 of the lead-out terminal.

[0033] The base plate 200 is provided with a cavity 20 for accommodating the cover plate end of the capacitor body 100. The cavity 20 is configured such that its depth is greater than or equal to the thickness of the capacitor cover plate 2, and less than half the length of the capacitor body 100. The inner diameter of the cavity 20 is equal to the outer diameter of the capacitor body 100, and the outer wall of the capacitor body 100 is in complete contact with the inner wall of the cavity 20.

[0034] Specifically, refer to Figures 3-5 As shown, a plurality of support arms extend vertically along the periphery of the inner surface of the base plate body 10, and the inner sides of the plurality of support arms enclose the cavity 20 for accommodating the capacitor; a slot 101 is provided on the base plate body 10, penetrating the inner surface and the outer surface of the base plate body 10; a terminal guide groove 102 is provided on the outer surface of the base plate body 10; the bottom surface of the base plate body 10 is set as a flat plane for mounting and fixing the base plate 200 onto the circuit board, and a terminal welding placement groove 103 connected to the terminal guide groove 102 is provided on the bottom surface for placing the welding part 212 of the capacitor lead-out terminal 21.

[0035] Reference Figure 3 As shown, the inner sides of the plurality of support arms are configured with arc-shaped surfaces, and the inner sides of the plurality of support arms enclose a cylindrical cavity 20 to fit a circular capacitor. It should be noted that in some other embodiments, the inner sides of the plurality of support arms can also be configured with other shapes, such as being planar, with the inner sides of multiple support arms enclosing a square cavity to fit a square capacitor. In some embodiments, the outer side of each support arm is configured to be composed of multiple planes, with a reinforcing rib formed at the junction of every two planes, thus balancing the high strength of the base plate with its small volume.

[0036] Reference Figure 3 As shown, in one embodiment, the plurality of support arms includes a first support arm 104, a second support arm 105, a third support arm 106, and a fourth support arm 107; wherein the first support arm 104, the second support arm 105, and the third support arm 106 are located on one half of the seat plate body 10, while the fourth support arm 107 is located on the other half of the seat plate body 10; the second support arm 105 is provided with a slot 101 between it and the first support arm 104 and the third support arm 106. A notch 108 is provided between the first support arm 104 and the fourth support arm 107, and correspondingly, a notch 108 is also provided between the third support arm 106 and the fourth support arm 107; the notch 108 is higher than the inner surface of the seat plate body 10. By providing the notch and the large-scale slot, the exposed area of ​​the capacitor body is increased, which is beneficial for the heat dissipation of the capacitor body.

[0037] Reference Figure 4 , Figure 5 As shown, the slot 101 is symmetrically arranged with the center line of the outer surface of the base plate body 10 as the center, and the terminal guide groove 102 is connected to the slot 101; correspondingly, the terminal guide groove 102 is symmetrically arranged on both sides of the outer surface of the base plate body 10. In some embodiments, the width of the slot 102 is greater than or equal to the width of the terminal guide groove 102.

[0038] The terminal welding placement groove 103 includes a first placement groove 1031 and a second placement groove 1032. The first placement groove 1031 and the second placement groove 1032 form an L-shape on the bottom surface of the base plate body 10. The first placement groove 1031 and the second placement groove 1032 are respectively connected to the terminal guide groove 102. The connection between the first placement groove 1031, the second placement groove 1032 and the terminal guide groove 102 is set with an arc transition.

[0039] Reference Figure 3 , Figure 4 , Figure 5 As shown, on the outer surface of the base plate body 10, the direction parallel to the outer surface of the base plate body 10 is defined as the width direction, and the direction perpendicular to the outer surface of the base plate body 10 is defined as the depth direction. In some embodiments, the depth d of the terminal guide groove 102 is equal to its width w; the width w of the first placement groove 1031... ` The first placement groove 1031 has the same width w as the terminal guide groove 102, and a depth d. `The depth d of the terminal guide groove 102 is twice the width direction. On the bottom surface of the base plate body 10, the direction parallel to the bottom surface of the base plate body 10 is defined as the width direction, and the direction perpendicular to the bottom surface of the base plate body 10 is defined as the depth direction. In some embodiments, the depth of the second placement groove 1032 is equal to the depth of the terminal guide groove 102. In some embodiments, the width of the second placement groove 1032 is equal to the width of the terminal guide groove 102. In some embodiments, the width of the second placement groove 1032 is twice the width of the terminal guide groove.

[0040] Reference Figure 1 , Figure 2 , Figure 6 As shown, the lead-out terminal 21 includes an extension 210 extending perpendicular to the capacitor cover plate, a bent portion 211 bent into an L-shape from the end of the extension, and a welded portion 212 bent and extending in the opposite direction to the extension from the end of the bent portion. The end of the welded portion 212 points towards the bottom of the capacitor body 100. In some embodiments, the bent portion 211 is bent in a direction away from the center of the capacitor cover plate; in some embodiments, the bent portion 211 is parallel to the surface of the capacitor cover plate 2. In some embodiments, the welded portion 212 is parallel to the side of the capacitor body; in some embodiments, the plane of the welded portion 212 is orthogonal to the plane of the bent portion 211.

[0041] Reference Figure 1 , Figure 2 As shown, the lead-out terminal 21 passes through the slot 101 on the base plate body. The length of the extension 210 of the lead-out terminal 21 is greater than or equal to the thickness of the base plate body 10. The inner surface of the base plate is in contact with the surface of the capacitor cover plate 2, thereby allowing the capacitor body 100 to be stably installed and fixed on the base plate 200, preventing the capacitor body from shaking. The bent portion 211 of the lead-out terminal 21 is placed in the terminal guide groove 102 on the outer surface of the base plate body 10, and the shape and size of the bent portion 211 are adapted to the guide groove 102. The welding portion 212 of the lead-out terminal is placed in the terminal welding placement groove 103 of the base plate body. In some embodiments, the diameter of the bent portion 211 of the lead-out terminal is adapted to the width of the terminal guide groove 102, thereby allowing the bent portion 211 to seamlessly contact the terminal guide groove 102 and be tightly locked in the terminal guide groove 102; in some embodiments, the surface of the bent portion of the lead-out terminal 21 is flush with the outer surface of the base plate body.

[0042] It should be noted that, corresponding to the two slots 101 on the base plate body 10, the lead-out terminals include a positive lead-out terminal 21 and a negative lead-out terminal 22. The positive lead-out terminal and the negative lead-out terminal have the same structure and correspond to the two slots of the base plate body, respectively. In some embodiments, the distance between the two slots 101 is specifically equal to the distance between the positive lead-out terminal 21 and the negative lead-out terminal 22;

[0043] Reference Figure 1 , Figure 2 As shown, when the capacitor 100 is mounted on the surface mount capacitor base plate 200 of this invention, the positive and negative terminals 21 and 22 of the capacitor 100 pass through the slot 101, are guided by the terminal guide groove 102, and then the soldering ends of the positive and negative terminals 21 and 22 are placed in the terminal soldering placement groove 103, and then soldered onto the circuit board. The bottom surface of the base plate body is tightly attached to the circuit board. In some embodiments, the width of the terminal guide groove 102 is set to match the diameter of the positive and negative terminals 21 and 22 of the capacitor, thereby ensuring that when the positive and negative terminals 21 and 22 of the capacitor are placed in the terminal guide groove, the positive and negative terminals 21 and 22 will not protrude above the bottom surface of the base plate body.

[0044] Reference Figure 4 , Figure 5 , Figure 6 As shown, the terminal welding placement groove 103 is configured to include a first placement groove 1031 and a second placement groove 1032, thereby accommodating various positive and negative terminal lead-out structures of the capacitor. The bottom surface of the base plate body 10 is a flat surface, ensuring a large contact area and stable and secure mounting when the base plate is attached to the circuit board. It should be noted that the base plate can be fixed to the circuit board by dispensing adhesive or other methods.

[0045] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5As shown, in some embodiments, the inner and outer surfaces of the base plate body 10 are parallel to each other. The inner surface of the base plate body 10 is configured to fit the shape of the cover plate of the capacitor 100, thereby ensuring that the capacitor 100 can make full contact with the base plate 200 when it is installed on the base plate, resulting in a more robust and secure installation. In some embodiments, the base plate body 10 is also provided with a positioning groove 109, which is configured to divide the capacitor base plate 200 into two halves. In some embodiments, the positioning groove 109 connects the second support arm 105, the outer surface of the base plate body, and the fourth support arm 107. When the capacitor is installed on the circuit board, the base plate is fixed to the circuit board, and the soldering part in the terminal soldering placement groove is soldered to the circuit board. The solder fills the terminal soldering placement groove, thereby installing the capacitor on the circuit board in a robust and secure manner. In addition, the soldering part of the lead-out terminal is parallel to the side of the capacitor. After being soldered to the circuit board, the force on the capacitor in both the longitudinal and transverse directions is greatly increased, thereby ensuring that the capacitor is stably installed on the circuit board and has strong vibration resistance. Furthermore, the base plate of this utility model, through such a design, can take into account both small size and high strength, and can stably fix the capacitor on the circuit board; in addition, by setting slots and notches between the support arms, and setting the cavity for accommodating the capacitor to ensure that the capacitor can be accommodated while maximizing the exposed surface area of ​​the capacitor, the heat dissipation performance of the capacitor is improved.

[0046] It is understood that the above description is a further detailed explanation of the present invention in conjunction with specific / preferred embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the inventive concept, and all such substitutions or modifications should be considered within the scope of protection of this patent. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention.

[0047] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of different embodiments or examples, without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the scope defined by the appended claims.

[0048] Furthermore, the scope of this invention is not intended to be limited to the specific embodiments of the processes, machines, manufactures, material compositions, means, methods, and steps described in the specification. Those skilled in the art will readily understand that existing or later-developed disclosures, processes, machines, manufactures, material compositions, means, methods, or steps that perform substantially the same function as the corresponding embodiments described herein or obtain substantially the same results as the embodiments described herein can be utilized. Therefore, the appended claims are intended to include such processes, machines, manufactures, material compositions, means, methods, or steps within their scope.

Claims

1. A horizontal patch on-board capacitor, characterized by: The capacitor body comprises an aluminum shell, a capacitor cover plate, and a lead terminal extending from the capacitor cover plate; the capacitor seat plate is sleeved on the cover plate end of the capacitor body; the seat plate is provided with a cavity accommodating the cover plate end of the capacitor body, and the depth of the cavity is greater than or equal to the thickness of the capacitor cover plate and less than one half of the length of the capacitor body.

2. The horizontal chip-attached on-board capacitor according to claim 1, wherein: The lead terminal comprises an extension part extending perpendicularly to the capacitor cover plate, a bending part bent at the end of the extension part, and a welding part extending perpendicularly and bent at the end of the bending part; the capacitor seat plate comprises a seat plate body, the thickness of the seat plate body is less than or equal to the length of the extension part of the lead terminal, the seat plate body is provided with a slot matched with the extension part of the lead terminal, a terminal guide slot accommodating the bending part of the lead terminal, and a terminal welding placement slot placing the welding part of the lead terminal.

3. The horizontal chip-attached on-board capacitor according to claim 1, wherein: The inner diameter of the cavity is equal to the outer diameter of the capacitor body, and the outer wall of the shell of the capacitor body is in full contact with the inner wall of the cavity.

4. The horizontal chip-attached on-board capacitor according to claim 2, wherein: The diameter of the bending part of the lead terminal is matched with the width of the terminal guide slot; the surface of the bending part is flush with the outer surface of the seat plate body.

5. The horizontal patch car capacitor of claim 2, wherein: The bending part is bent in a direction away from the center of the capacitor cover plate and parallel to the surface of the capacitor cover plate.

6. The horizontal patch car capacitor of claim 2, wherein: The slot is arranged to pass through the inner surface and the outer surface of the seat plate body, and the terminal guide slot is connected with the slot.

7. The horizontal patch car capacitor of claim 2, wherein: The inner surface periphery of the seat plate body is vertically provided with a plurality of support arms, and the inner side of the plurality of support arms encloses the cavity accommodating the capacitor.

8. The horizontal patch car capacitor of claim 2, wherein: The slot is symmetrically arranged with the center line of the outer surface of the seat plate body as the center, and the terminal guide slot is symmetrically arranged on both sides of the outer surface of the seat plate body.

9. The horizontal patch car capacitor of claim 7, wherein: The plurality of support arms comprise a first support arm, a second support arm, a third support arm, and a fourth support arm; the first support arm, the second support arm, and the third support arm are located on one half of the seat plate body, and the fourth support arm is located on the other half of the seat plate body.

10. The horizontal patch car capacitor of claim 9, wherein: The first support arm and the third support arm are respectively provided with notches between them and the fourth support arm, and the notches are higher than the inner surface of the seat plate body.

Images