Vehicle-mounted capacitor

Abstract

The invention discloses a vehicle-mounted capacitor which comprises a capacitor body and a capacitor base 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 leading-out terminal comprises an extension part which extends vertically to the capacitor cover plate, a bending part which is bent from the tail end of the extension part, and a welding part which is bent vertically and extends from the tail end of the bending part; the capacitor base plate comprises a base plate main body, the thickness of the base plate main body is smaller than or equal to the length of the extension part of the leading-out terminal, and the base plate main body is provided with an open slot matched with the extension part of the leading-out terminal, a terminal guide slot for accommodating the bending part of the leading-out terminal and a terminal welding placement slot for placing the welding part of the leading-out terminal. The vehicle-mounted capacitor can be stably installed and fixed on the circuit board, and shaking caused by vibration of a vehicle is avoided so that the vehicle-mounted capacitor can adapt to various complex application environments of jolting and vibration.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic devices, and in particular relates to a vehicle-mounted capacitor. Background Art

[0002] Aluminum electrolytic capacitors are indispensable for power supplies due to their high capacity, high voltage and reasonable price. In recent years, the application occasions of leaded aluminum electrolytic capacitors with high voltage, large capacity and large ripple current have gradually increased.

[0003] With the development of new energy vehicles, many chip capacitors have been used in new energy vehicles. In view of the complex usage scenarios of automobiles and automobile safety considerations, the installation requirements for chip capacitors used in automobiles are relatively high, ensuring that the chip capacitors can be stably installed and fixed, and will not shake due to the vibration of the car during long-term use, so as to avoid poor contact or loose contact caused by shaking, which may cause circuit failure.

[0004] However, the chip capacitors currently used in new energy vehicles have not taken the installation and fixation issues into consideration well. The positive and negative terminals of the capacitors are only welded to the circuit board. During the long-term use of the car, as the car is bumped and vibrated, the capacitors are prone to shaking. Long-term shaking will eventually cause the positive and negative terminals to loosen or be damaged, thus affecting the life of the capacitor products.

[0005] It can be seen that, with respect to the above-mentioned current existing technologies, it is necessary to conduct research and development to provide a solution so that the capacitor can be stably and firmly mounted on the circuit board to adapt to various complex application environments with bumps and vibrations.

[0006] The disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0007] An object of the present invention is to provide a vehicle-mounted capacitor to solve at least one of the above-mentioned background technical problems.

[0008] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0009] A vehicle-mounted capacitor comprises a capacitor body and a capacitor seat plate; the capacitor body comprises an aluminum shell, a capacitor cover plate, and a lead terminal led out from the capacitor cover plate; the capacitor seat plate is sleeved on the cover plate end of the capacitor body; wherein the lead terminal comprises an extension portion extending perpendicularly to the capacitor cover plate, a bent portion bent from the end of the extension portion, and a welding portion bent and extended perpendicularly from the end of the bent portion; 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 portion of the lead terminal, and the seat plate body is provided with a slot matched with the extension portion of the lead terminal, a terminal guide slot for accommodating the bent portion of the lead terminal, and a terminal welding placement slot for placing the welding portion of the lead terminal.

[0010] In some embodiments, the seat plate is provided with a cavity for accommodating the cover end of the capacitor body, and the cavity is configured such that the depth of the cavity is greater than or equal to the thickness of the capacitor cover and less than half the length of the capacitor body.

[0011] In some embodiments, the bent portion is bent in a direction away from the center of the capacitor cover plate and is parallel to a surface of the capacitor cover plate.

[0012] In some embodiments, the diameter of the bent portion of the lead terminal is matched with the width of the terminal guide groove; and the surface of the bent portion is flush with the outer surface of the seat plate body.

[0013] 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 shell of the capacitor body is in full contact with the inner wall of the cavity.

[0014] In some embodiments, a plurality of support arms are vertically extended from the periphery of the inner surface of the seat plate body, and the inner sides of the plurality of support arms enclose the cavity for accommodating the capacitor.

[0015] In some embodiments, the plurality of support arms include 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, and the fourth support arm is located on the other half of the seat plate body.

[0016] In some embodiments, recesses are respectively provided between the first support arm, the third support arm and the fourth support arm, and the recesses are higher than the inner surface of the seat plate body.

[0017] In some embodiments, the slot is configured to penetrate the inner surface of the seat plate body and the outer surface of the seat plate body, and the terminal guide groove is connected to the slot.

[0018] In some embodiments, the slots are symmetrically arranged with the center line of the outer surface of the seat plate body as the center, and the terminal guide grooves are symmetrically arranged on both sides of the outer surface of the seat plate body.

[0019] The beneficial effects of the technical solution of the present invention are:

[0020] Compared with the prior art, the vehicle-mounted capacitor of the present invention can be stably mounted and fixed on the circuit board to avoid shaking due to the vibration of the vehicle and adapt to various complex application environments with bumps and vibrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 is a three-dimensional schematic diagram of a vehicle-mounted capacitor according to an embodiment of the present invention;

[0023] Figure 2 is a partially exploded schematic diagram of a vehicle-mounted capacitor according to an embodiment of the present invention;

[0024] Figure 3 is a three-dimensional schematic diagram of a capacitor seat plate of a vehicle-mounted capacitor according to an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of another angle of a capacitor seat plate of a vehicle-mounted capacitor according to an embodiment of the present invention;

[0026] Figure 5 1 is another angled schematic diagram of a capacitor seat plate of a vehicle-mounted capacitor according to an embodiment of the present invention;

[0027] Figure 6 It is a three-dimensional schematic diagram of a capacitor body of a vehicle-mounted capacitor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention clearer and more understandable, and to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for fixing or for circuit connection.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, unless otherwise clearly specified and defined, the meaning of "multiple" is two or more, and the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] Reference Figure 1-Figure 6As shown, as an embodiment of the present invention, a vehicle-mounted capacitor is provided, comprising a capacitor body 100 and a capacitor seat plate 200; the capacitor body 100 comprises 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 a lead terminal 21 led out from the capacitor cover plate 2; the capacitor seat plate 200 is sleeved on the cover plate end of the capacitor body 100; wherein the lead terminal 21 comprises an extension portion 210 extending perpendicularly to the capacitor cover plate, a lead terminal 210 extending from the extension portion 210 10, a bent portion 211 bent at the end, and a welding portion 212 bent vertically and extended from the end of the bent portion 211; the capacitor seat plate 200 includes a seat plate body 10, the thickness of the seat plate body 10 is less than or equal to the length of the extension portion 210 of the lead terminal, and the seat plate body 10 is provided with a groove 101 that cooperates with the extension portion 210 of the lead terminal, a terminal guide groove 102 that accommodates the bent portion 211 of the lead terminal, and a terminal welding placement groove 103 that places the welding portion 212 of the lead terminal.

[0033] The seat plate 200 is provided with a cavity 20 for accommodating the cover end of the capacitor body 100, and the cavity 20 is configured such that the depth of the cavity is greater than or equal to the thickness of the capacitor cover 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 shell of the capacitor body 100 is in full contact with the inner wall of the cavity 20.

[0034] Specifically, refer to Figure 3-Figure 5 As shown, a plurality of support arms are vertically extended from the periphery of the inner surface of the seat plate body 10, and the inner sides of the plurality of support arms are enclosed to form the cavity 20 for accommodating the capacitor; a groove 101 is provided on the seat plate body 10, which passes through the inner surface of the seat plate body 10 and the outer surface of the seat plate body 10; a terminal guide groove 102 is provided on the outer surface of the seat plate body 10; the bottom surface of the seat plate body 10 is set to a flat plane, which is used to mount and fix the seat plate 200 on the circuit board, and a terminal welding placement groove 103 connected to the terminal guide groove 102 is provided on the bottom surface, which is used to place the welding part 212 of the capacitor lead terminal 21.

[0035] Reference Figure 3 As shown, the inner side of the plurality of support arms is configured as an arc surface, and the inner sides of the plurality of support arms are combined to form a cylindrical cavity 20 to match the circular capacitor. It should be noted that in some other embodiments, the inner sides of the plurality of support arms can also be configured as other shapes, such as being configured as a plane, and the inner sides of the plurality of support arms are combined to form a square cavity to match the square capacitor. In some embodiments, the outer side of each of the plurality of support arms is configured to be composed of a plurality of planes, and a reinforcing rib is formed at the connection between each two planes, thereby taking into account both the high strength of the seat plate and the small volume of the seat plate.

[0036] Reference Figure 3 As shown, in one embodiment, the plurality of support arms include 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, and the fourth support arm 107 is located on the other half of the seat plate body 10; the slots 101 are respectively provided between the second support arm 105 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 to 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 seat plate body 10 as the center, and the terminal guide slot 102 is connected to the slot 101; correspondingly, the terminal guide slot 102 is symmetrically arranged on both sides of the outer surface of the seat plate body 10. In some embodiments, the slot width of the slot 102 is greater than or equal to the width of the terminal guide slot 102.

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

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

[0040] Reference Figure 1 , Figure 2 , Figure 6 As shown, the lead terminal 21 includes an extension portion 210 extending perpendicularly to the capacitor cover, a bent portion 211 bent into an L-shape from the end of the extension portion, and a welding portion 212 bent and extended from the end of the bent portion in a direction opposite to the extension direction of the extension portion, and the end of the welding portion 212 points to 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; in some implementations, the bent portion 211 is parallel to the surface of the capacitor cover 2. In some embodiments, the welding portion 212 is parallel to the side of the capacitor body; in some embodiments, the plane where the welding portion 212 is located is orthogonal to the plane where the bent portion 211 is located. In another embodiment, the welding portion is divided into two sections, and the two sections of the welding portion are on the same plane and are perpendicular to each other on the bottom surface of the seat plate body 10.

[0041] Reference Figure 1 , Figure 2 As shown, the lead terminal 21 passes through the slot 101 on the seat plate body, the length of the extension portion 210 of the lead terminal 21 is greater than or equal to the thickness of the seat plate body 10, and the inner surface of the seat plate contacts the surface of the capacitor cover plate 2, so that the capacitor body 100 is stably installed and fixed on the seat plate 200 to prevent the capacitor body from shaking. The bent portion 211 of the lead terminal 21 is placed in the terminal guide groove 102 on the outer surface of the seat 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 terminal is placed in the terminal welding placement groove 103 of the seat plate body. In some embodiments, the diameter of the bent portion 211 of the lead terminal is adapted to the width of the terminal guide groove 102, so that the bent portion 211 is seamlessly in contact with the terminal guide groove 102 and is tightly stuck in the terminal guide groove 102; in some embodiments, the surface of the bent portion of the lead terminal 21 is flush with the outer surface of the seat plate body.

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

[0043] Reference Figure 1 , Figure 2 As shown, when the capacitor 100 is installed on the chip capacitor seat 200 of the present invention, the positive and negative lead terminals 21 and 22 of the capacitor 100 pass through the slot 101 respectively, and after being guided by the terminal guide slot 102, the welding ends of the positive and negative lead terminals 21 and 22 are placed in the terminal welding placement slot 103 respectively, and then welded to the circuit board, and the bottom surface of the seat body is closely mounted on the circuit board. In some embodiments, the width of the terminal guide slot 102 is set to match the diameter of the positive and negative lead terminals 21 and 22 of the capacitor, so as to ensure that when the positive and negative lead terminals 21 and 22 of the capacitor are placed in the terminal guide slot, the positive and negative lead terminals 21 and 22 will not be higher than the bottom surface of the seat body.

[0044] Reference Figure 4 , Figure 5 , Figure 6 As shown, the terminal welding placement groove 103 is configured to include a first section placement groove 1031 and a second section placement groove 1032, so as to meet various positive and negative lead-out terminal structures of the capacitor. The bottom surface of the seat plate body 10 is a flat surface, which can ensure that when the seat plate is mounted on the circuit board, the contact area is large and the mounting is stable and firm. If necessary, the seat plate can be fixed on the circuit board by dispensing glue or other methods.

[0045] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5As shown, in some embodiments, the inner surface and the outer surface of the seat plate body 10 are parallel to each other, and the inner surface of the seat plate body 10 is configured to match the shape of the cover plate of the capacitor 100, so as to ensure that the capacitor 100 can be fully contacted with the seat plate 200 when installed on the seat plate, and the installation is more firm and firm. In some embodiments, the seat plate body 10 is also provided with a positioning groove 109, and the positioning groove 109 is configured to divide the capacitor seat plate 200 into two halves; in some embodiments, the positioning groove 109 connects the second support arm 105, the outer surface of the seat plate body and the fourth support arm 107. When the capacitor is installed on the circuit board, the seat plate is fixed on the circuit board, and the welding part in the terminal welding placement groove is welded on the circuit board, and the solder fills the terminal welding placement groove, so that the capacitor is installed on the circuit board, and the installation is fixed and firm. In addition, the welding part of the lead terminal is parallel to the side of the capacitor. After being welded to the circuit board, the force of the capacitor in the longitudinal direction and the transverse direction is greatly improved, so as to ensure that the capacitor is stably installed on the circuit board and has strong anti-vibration performance. Furthermore, the seat plate of the present invention is designed in this way so as to take into account both the small size and high strength of the seat plate, and can stably fix the capacitor on the circuit board; in addition, by providing slots and recesses between the support arms, and arranging the cavity for accommodating the capacitor to ensure that the capacitor can be accommodated while maximizing the area of ​​the capacitor surface exposed to the outside, the heat dissipation performance of the capacitor is improved.

[0046] It is understandable that the above content is a further detailed description of the invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the invention is limited to these descriptions. For ordinary technicians in the technical field to which the invention belongs, without departing from the concept of the invention, they can also make several substitutions or modifications to the described embodiments, and these substitutions or modifications should be deemed to belong to the scope of protection of this patent. In the description of this specification, the description of reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention.

[0047] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other. Although the embodiments and advantages of the invention have been described in detail, it should be understood that various changes, substitutions and modifications may be made herein without departing from the scope defined by the appended claims.

[0048] Furthermore, the scope of the invention is not intended to be limited to the specific embodiments of the processes, machines, manufactures, compositions of matter, means, methods, and steps described in the specification. One of ordinary skill in the art will readily appreciate that the above disclosures, processes, machines, manufactures, compositions of matter, means, methods, or steps currently existing or to be developed that perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results as the embodiments described herein may be utilized. Therefore, the appended claims are intended to include such processes, machines, manufactures, compositions of matter, means, methods, or steps within their scope.

Claims

1. A vehicle-mounted capacitor, characterized in that: It comprises a capacitor body and a capacitor seat; the capacitor body comprises an aluminum shell, a capacitor cover, and a lead terminal led out from the capacitor cover; the capacitor seat is sleeved on the cover end of the capacitor body; wherein the lead terminal comprises an extension portion extending perpendicularly to the capacitor cover, a bent portion bent from the end of the extension portion, and a welding portion bent and extended perpendicularly from the end of the bent portion; the capacitor seat comprises a seat body, the thickness of the seat body is less than or equal to the length of the extension portion of the lead terminal, and the seat body is provided with a slot matched with the extension portion of the lead terminal, a terminal guide slot for accommodating the bent portion of the lead terminal, and a terminal welding placement slot for placing the welding portion of the lead terminal.

2. The vehicle-mounted capacitor according to claim 1, characterized in that: The seat plate is provided with a cavity for accommodating the cover plate end of the capacitor body, and the cavity is 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.

3. The vehicle-mounted capacitor according to claim 1, wherein: The bent portion is bent in a direction away from the center of the capacitor cover plate and is parallel to the surface of the capacitor cover plate.

4. The vehicle-mounted capacitor according to claim 1, wherein: The diameter of the bent portion of the lead-out terminal is matched with the width of the terminal guide groove; the surface of the bent portion is flush with the outer surface of the seat plate body.

5. The vehicle-mounted capacitor according to claim 2, characterized in that: 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 completely in contact with the inner wall of the cavity.

6. The vehicle-mounted capacitor according to claim 2, characterized in that: A plurality of support arms are vertically extended from the periphery of the inner surface of the seat plate body, and the inner sides of the plurality of support arms are surrounded to form the cavity for accommodating the capacitor.

7. The vehicle-mounted capacitor according to claim 6, characterized in that: The plurality of support arms include 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, and the fourth support arm is located on the other half of the seat plate body.

8. The vehicle-mounted capacitor according to claim 7, characterized in that: Notches are respectively arranged between the first support arm, the third support arm and the fourth support arm, and the notches are higher than the inner surface of the seat plate body.

9. The vehicle-mounted capacitor according to claim 1, characterized in that: The slot is configured to penetrate the inner surface of the seat plate body and the outer surface of the seat plate body, and the terminal guide groove is connected to the slot.

10. The vehicle-mounted capacitor according to claim 9, characterized in that: The slots are symmetrically arranged with the center line of the outer surface of the seat plate body as the center, and the terminal guide grooves are symmetrically arranged on both sides of the outer surface of the seat plate body.

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