Capacitor element

Abstract

The utility model relates to the technical field of electronic elements, and discloses a capacitor element, which comprises a capacitor main body, outer electrodes and metal terminals, and the outer electrodes are arranged in pairs, are respectively arranged on two side surfaces of the capacitor main body and are connected with the capacitor main body in a welding manner; the two metal terminals are arranged on the two sides of the capacitor body and connected with the outer electrode in a welded mode. The metal terminal comprises a connecting part, an extending part and a welding part which are sequentially arranged in the Z direction, the connecting part is connected with the outer electrode in a welded mode, the extending part is connected with the connecting part and the welding part, and the welding part is used for being connected with a bonding pad of a circuit board in a welded mode; the connecting part comprises a side plate and a bottom plate. Compared with the prior art, high-temperature welding flux does not need to be selected any more, cracks, caused by high-temperature welding, of the capacitor body are avoided, the capacitor body can be limited through the side plates of the connecting part so that positioning of the capacitor body can be achieved, and the capacitor body can be connected with the metal terminal in a proper posture; moreover, the connection area between the metal terminal and the capacitor body can be increased, and the binding force between the two is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a capacitor component. Background Art

[0002] In order to adapt to the harsh application environment such as in vehicle-mounted electronic equipment, capacitor elements with sheet metal terminals are widely used. Figure 1 As shown, the capacitor element comprises a capacitor body 100, two external electrodes 200 tightly coupled to the capacitor body 100, and two metal terminals 300. During use, one end of the metal terminal 300 is first welded to the external electrode 200, and then the other end of the metal terminal 300 is welded to the circuit board, thereby allowing the capacitor element to be mounted on the circuit board via the metal terminals 300. The capacitor body 100 is primarily made of ceramic, which is prone to cracking when subjected to mechanical stress. The metal terminals 300 are elastic and can absorb mechanical stress, preventing the capacitor body 100 from cracking and improving the reliability of the capacitor element. However, during use, operators discovered that when the other ends of the metal terminals 300 were welded to the circuit board, the solder joints between the capacitor body 100 and the metal terminals 300 melted, causing the capacitor body 100 to slip off the metal terminals 300, resulting in poor installation. To prevent the solder joints between the capacitor body 100 and the metal terminals 300 from melting, high-temperature solder is required for welding the metal terminals 300 to the capacitor body 100. However, high soldering temperatures can easily cause cracks in the capacitor body 100. Therefore, it is necessary to optimize the structure of the capacitor element to prevent the capacitor body 100 from sliding off the metal terminal 300 when the capacitor element is welded to the circuit board. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present utility model is to provide a capacitor element, whose metal terminal can support the capacitor body when the solder joint between the capacitor body and the metal terminal melts, thereby preventing the capacitor body from slipping off the metal terminal and avoiding poor installation.

[0004] Based on this, the present invention provides a capacitor element, which includes:

[0005] a capacitor body having a first side surface and a second side surface opposite to each other along the X direction, a third side surface and a fourth side surface opposite to each other along the Y direction, and a fifth side surface and a sixth side surface opposite to each other along the Z direction;

[0006] External electrodes, the external electrodes are arranged in pairs and are respectively arranged on the first side surface and the second side surface of the capacitor body;

[0007] a metal terminal, wherein the metal terminal is provided with two pieces and corresponds one-to-one with the two external electrodes, the metal terminal is welded to the external electrodes, the metal terminal comprises a connecting portion, an extending portion, and a welding portion sequentially arranged along the Z direction, the connecting portion is welded to the external electrode, the extending portion is connected to the connecting portion and the welding portion, and the welding portion is used to be welded to the pad of the circuit board;

[0008] The connecting portion includes two side plates extending along the third side surface and the fourth side surface respectively, and a bottom plate extending along the fifth side surface. The side plates cooperate with the bottom plate to support the capacitor body.

[0009] In some embodiments of the present application, the external electrode extends toward the middle of the capacitor body to partially cover the third side surface, the fourth side surface, the fifth side surface, and the sixth side surface.

[0010] In some embodiments of the present application, a first inner electrode and a second inner electrode are further included. The first inner electrode and the second inner electrode are arranged in the capacitor body and staggered along the thickness direction of the capacitor body. The first inner electrode is connected to the outer electrode on one side of the capacitor element, and the second inner electrode is connected to the outer electrode on the other side of the capacitor element.

[0011] In some embodiments of the present application, the capacitor body is formed by stacking and sintering a plurality of ceramic layers, and the ceramic layer is filled between the first internal electrode and the second internal electrode in the capacitor body.

[0012] In some embodiments of the present application, the side plate extends in a direction away from the capacitor body and forms an opening of size α with the third side surface and / or the fourth side surface.

[0013] In some embodiments of the present application, the size of α is preferably 5°-20°

[0014] In some embodiments of the present application, the opening is arranged along the X direction.

[0015] In some embodiments of the present application, the opening is arranged along the Z direction.

[0016] In some embodiments of the present application, the extension portion is connected to the middle portion of the welding portion.

[0017] The present invention provides a capacitor element, which has the following advantages compared with the prior art:

[0018] This application no longer requires the use of high-temperature solder, thereby avoiding cracks in the capacitor body caused by high-temperature welding. The side plates of the connecting part can limit the capacitor body to achieve the positioning of the capacitor body, so that the capacitor body is connected to the metal terminal in an appropriate posture, and can increase the connection area between the metal terminal and the capacitor body, thereby increasing the bonding strength between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a capacitor element in the prior art;

[0020] Figure 2 This is a schematic structural diagram of a capacitor element according to some embodiments of the present application;

[0021] Figure 3 This is a schematic structural diagram of a metal terminal in some embodiments of the present application;

[0022] Figure 4 A front view of a capacitor element according to some embodiments of the present application;

[0023] Figure 5 A side view of a capacitor element according to some embodiments of the present application;

[0024] Figure 6 A top view of a capacitor element according to some embodiments of the present application;

[0025] Figure 7 This is a schematic diagram of the internal structure of a capacitor body in some embodiments of the present application;

[0026] Figure 8 A top view of a capacitor element according to another embodiment of the present application;

[0027] Figure 9 A side view of a capacitor element according to another embodiment of the present application;

[0028] Figure 10 It is a front view of a capacitor element according to some other embodiments of the present application;

[0029] In the figure, 1. capacitor body; 11. ceramic layer; 2. external electrode; 3. metal terminal; 31. connecting part; 311. bottom plate; 312. side plate; 32. extension part; 33. welding part; 4. first inner electrode; 5. second inner electrode; 100. capacitor body; 200. external electrode; 300. metal terminal. DETAILED DESCRIPTION

[0030] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] It should be understood that the terms "front" and "rear" etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "front" information may also be referred to as the "rear" information, and the "rear" information may also be referred to as the "front" information. In order to better describe the structural design of the present application, the length direction of the capacitor body in the present application is defined as the X direction, the width direction of the capacitor body in the present application is defined as the Y direction, and the thickness direction of the capacitor body in the present application is defined as the Z direction.

[0032] like Figures 2 to 7 As shown, an embodiment of the present invention provides a capacitor element, which includes a capacitor body 1, an external electrode 2 and a metal terminal 3. Specifically, the capacitor body 1 has a first side surface and a second side surface arranged opposite to each other along the X direction, a third side surface and a fourth side surface arranged opposite to each other along the Y direction, and a fifth side surface and a sixth side surface arranged opposite to each other along the Z direction; the external electrodes 2 are arranged in pairs and are respectively arranged on the first side surface and the second side surface of the capacitor body 1; the metal terminal 3 has two pieces and corresponds one to one to the two external electrodes 2, and the metal terminal 3 is welded to the external electrode 2. Further, the metal terminal 3 includes a connecting portion 31, an extension portion 32 and a welding portion 33 arranged in sequence along the Z direction, the connecting portion 31 is welded to the external electrode 2, the extension portion 32 is connected to the connecting portion 31 and the welding portion 33, and the welding portion 33 is used to be welded to the pad of the circuit board; further, the connecting portion 31 includes two side plates 312 extending along the third side surface and the fourth side surface respectively and a bottom plate 311 extending along the fifth side surface, and the side plates 312 and the bottom plate 311 cooperate to support the capacitor body 1.

[0033] Based on the above structure, the two metal terminals 3 are respectively welded to the two ends of the capacitor body 1 through the external electrode 2 to achieve a fixed connection between the metal terminal 3 and the capacitor body 1. When assembling, the metal terminal 3 is welded to the pad of the circuit board to achieve a fixed connection between the capacitor element and the circuit board; when in use, the extension portion 32 of the two metal terminals 3 can produce elastic deformation to absorb the mechanical stress transmitted from the circuit board, thereby preventing the capacitor body 1 from cracking. At the same time, based on the setting of the bottom plate 311 and the side plate 312 of the connecting portion 31, the bottom plate 311 and the side plate 312 can cover part of the capacitor body 1 to achieve a supporting effect on the capacitor body 1, thereby preventing the capacitor body 1 from sliding off the metal terminal 3 and avoiding poor installation. In this way, the present application no longer needs to use high-temperature solder, avoiding the generation of cracks in the capacitor body 1 caused by high-temperature welding. The side plate 312 of the connecting portion 31 can limit the capacitor body 1 to achieve the positioning of the capacitor body 1, so that the capacitor body 1 is connected to the metal terminal 3 in an appropriate posture, and can increase the connection area between the metal terminal 3 and the capacitor body 1, thereby increasing the bonding force between the two.

[0034] Optionally, in order to further strengthen the connection effect between the external electrode 2 and the capacitor body 1, in some embodiments of the present application, the external electrode 2 extends toward the middle of the capacitor body 1 to partially cover the third side, the fourth side, the fifth side and the sixth side.

[0035] Furthermore, in some embodiments of the present application, in addition to the external electrode 2, the present application also includes a first internal electrode 4 and a second internal electrode 5. The first internal electrode 4 and the second internal electrode 5 are arranged in the capacitor body 1 and staggered along the thickness direction of the capacitor body 1. The first internal electrode 4 is connected to the external electrode 2 on one side of the capacitor element, and the second internal electrode 5 is connected to the external electrode 2 on the other side of the capacitor element. Furthermore, the capacitor body 1 is formed by stacking and sintering a plurality of ceramic layers 11, and the ceramic layer 11 is filled between the first internal electrode 4 and the second internal electrode 5 in the capacitor body 1. In this way, the above design can increase the capacitance of the capacitor element and thus enhance the user experience.

[0036] Optional, such as Figure 8 As shown, in another embodiment of the present application, the side plate 312 of the connecting portion 31 extends in a direction away from the capacitor body 1 and forms an opening of size α arranged along the X direction with the third side surface and / or the fourth side surface. The size of the opening α in this embodiment is preferably 5°-20°.

[0037] Further, such as Figure 9 As shown, in another embodiment of the present application, the side plate 312 of the connecting portion 31 extends in a direction away from the capacitor body 1 and forms an opening arranged along the Z direction with the third side surface and / or the fourth side surface. The size of the opening α in this embodiment is preferably 5°-20°.

[0038] In addition, if Figure 10 As shown, in some embodiments of the present application, the extension portion 32 is connected to the middle portion of the welding portion 33 , and the welding portion 33 and the extension portion 32 are arranged in a “T” shape.

[0039] In summary, the present invention provides a capacitor element, which includes a capacitor body 1, an external electrode 2 and a metal terminal 3. The capacitor body 1 has a first side surface and a second side surface arranged opposite to each other along the X direction, a third side surface and a fourth side surface arranged opposite to each other along the Y direction, and a fifth side surface and a sixth side surface arranged opposite to each other along the Z direction; the external electrodes 2 are arranged in pairs and are respectively arranged on the first side surface and the second side surface of the capacitor body 1; the metal terminal 3 has two pieces and corresponds one-to-one to the two external electrodes 2, the metal terminal 3 is welded to the external electrode 2, the metal terminal 3 includes a connecting portion 31, an extension portion 32 and a welding portion 33 arranged in sequence along the Z direction, the connecting portion 31 is welded to the external electrode 2, the extension portion 32 is connected to the connecting portion 31 and the welding portion 33, and the welding portion 33 is used to be welded to the pad of the circuit board; the connecting portion 31 includes two side plates 312 extending along the third side surface and the fourth side surface respectively and a bottom plate 311 extending along the fifth side surface, the side plates 312 and the bottom plate 311 cooperate to support the capacitor body 1. Compared with the prior art, the present application no longer requires the use of high-temperature solder, thereby avoiding cracks in the capacitor body 1 caused by high-temperature welding. The side plate 312 of the connecting part 31 can limit the capacitor body 1 to achieve the positioning of the capacitor body 1, so that the capacitor body 1 is connected to the metal terminal 3 in an appropriate posture, and can increase the connection area between the metal terminal 3 and the capacitor body 1, thereby increasing the bonding force between the two.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A capacitor element, characterized in that: include: A capacitor body (1), the capacitor body (1) having a first side surface and a second side surface arranged opposite to each other along the X direction, a third side surface and a fourth side surface arranged opposite to each other along the Y direction, and a fifth side surface and a sixth side surface arranged opposite to each other along the Z direction; External electrodes (2), the external electrodes (2) being arranged in pairs and respectively arranged on a first side surface and a second side surface of the capacitor body (1); A metal terminal (3), wherein the metal terminal (3) is provided with two pieces and corresponds one to one with the two external electrodes (2); the metal terminal (3) is welded to the external electrodes (2); the metal terminal (3) comprises a connecting portion (31), an extending portion (32), and a welding portion (33) sequentially arranged along the Z direction; the connecting portion (31) is welded to the external electrode (2); the extending portion (32) is connected to the connecting portion (31) and the welding portion (33); and the welding portion (33) is used for welding to a pad of a circuit board; The connecting portion (31) comprises two side plates (312) extending along the third side surface and the fourth side surface respectively, and a bottom plate (311) extending along the fifth side surface; the side plates (312) cooperate with the bottom plate (311) to support the capacitor body (1).

2. The capacitor element according to claim 1, wherein The external electrode (2) extends toward the middle of the capacitor body (1) to partially cover the third side surface, the fourth side surface, the fifth side surface, and the sixth side surface.

3. The capacitor element according to claim 1, wherein The capacitor element further comprises a first inner electrode (4) and a second inner electrode (5), wherein the first inner electrode (4) and the second inner electrode (5) are arranged in the capacitor body (1) and staggered along the thickness direction of the capacitor body (1); the first inner electrode (4) is connected to the outer electrode (2) on one side of the capacitor element, and the second inner electrode (5) is connected to the outer electrode (2) on the other side of the capacitor element.

4. The capacitor element according to claim 3, wherein: The capacitor body (1) is formed by stacking and sintering a plurality of ceramic layers (11), and the ceramic layer (11) is filled between the first internal electrode (4) and the second internal electrode (5) in the capacitor body (1).

5. The capacitor element according to claim 1, wherein The side plate (312) extends in a direction away from the capacitor body (1) and forms an opening with a size of α with the third side surface and / or the fourth side surface.

6. The capacitor element according to claim 5, wherein: The value of α is 5°-20°.

7. The capacitor element according to claim 5, wherein: The opening is arranged along the X direction.

8. The capacitor element according to claim 5, wherein: The opening is arranged along the Z direction.

9. The capacitor element according to claim 1, wherein The extension portion (32) is connected to the middle portion of the welding portion (33).

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