Chip solid electrolytic capacitors

Abstract

The present application relates to the technical field of capacitors, and discloses a chip-type solid electrolytic capacitor, comprising an electrolytic capacitor body and a positive electrode sheet and a negative electrode sheet arranged on the capacitor body, and also comprising: a fixing unit, which is arranged on the positive electrode sheet and the negative electrode sheet, and is used to make electrolytic paper and aluminum foil tightly wound on the positive electrode sheet and the negative electrode sheet respectively, so as to prevent the electrolytic paper and the aluminum foil from loosening; the fixing unit comprises: a pre-fixing component, which is symmetrically arranged on both sides of the positive electrode sheet and the negative electrode sheet in the width direction respectively, and is used to make the electrolytic paper and the aluminum foil pre-fixed in position during installation and to make them close to the positive electrode sheet and the negative electrode sheet, so as to solve the problems in the prior art that it is difficult to distinguish polarity, causing failure at the lead connection, and the electrode sheet becomes loose after long-term use, affecting the installation of the capacitor, and realizes the anti-reverse installation of the positive and negative pins and enables the electrolytic paper and the aluminum foil to be stably connected to the positive and negative electrode sheets.

Description

Technical Field

[0001] The present application relates to the technical field of capacitors, and in particular to chip-type solid electrolytic capacitors. Background Art

[0002] The structure of solid electrolytic capacitors is exactly the same as that of liquid electrolytic capacitors. Both are winding structures, packaged in aluminum shells and rubber plugs, with the leads nailed to the cathode foil and anode foil. During installation, the leads are welded to the circuit board.

[0003] However, in the process of implementing relevant technical solutions, it was found that at least the following technical problems exist: First, the lead wires are prone to breakage or loose welding when connected to the circuit board. The lead wire connections are prone to failure in a vibrating working environment. Installation is also inconvenient, and it is difficult to distinguish the polarity. It is easy to make mistakes in the production and installation process, resulting in reverse polarity. Second, the gas generated during the operation of the capacitor can only escape from the positive and negative electrode welding pieces. In the long run, it will cause the aluminum sheet and the electrode sheet to loosen, affecting the installation strength of the capacitor. Summary of the invention

[0004] The present application provides a chip-type solid electrolytic capacitor, which solves the problems in the prior art of difficulty in distinguishing polarity, resulting in failure of lead connection and loosening of electrode sheets after long-term use, affecting the accuracy of capacitor installation. It realizes anti-reverse installation of positive and negative pins and enables electrolytic paper and aluminum foil to be stably connected to positive and negative electrode sheets.

[0005] The present application provides a chip-type solid electrolytic capacitor, comprising an electrolytic capacitor body and a positive electrode sheet and a negative electrode sheet arranged on the capacitor body, and also comprising: a fixing unit, which is arranged on the positive electrode sheet and the negative electrode sheet, and is used to make the electrolytic paper and the aluminum foil tightly wound on the positive electrode sheet and the negative electrode sheet respectively, so as to prevent the electrolytic paper and the aluminum foil from loosening; the fixing unit comprises: a pre-fixing component, which is symmetrically arranged on both sides of the positive electrode sheet and the negative electrode sheet in the width direction, and is used to make the electrolytic paper and the aluminum foil pre-fixed in position during installation and to make them close to the positive electrode sheet and the negative electrode sheet; a re-fixing component, which is respectively arranged between two groups of pre-fixing components, and is used to make the electrolytic paper and the aluminum foil fixed on the positive electrode sheet and the negative electrode sheet even if the positive electrode sheet and the negative electrode sheet become loose under long-term use; an anti-reverse unit, which is arranged at the bottom of the electrolytic capacitor body, and is used to distinguish the positive and negative pins and to fix the electrolytic container body.

[0006] Furthermore, the anti-reverse unit includes: an anti-reverse component, which is arranged at the bottom of the electrolytic capacitor body and is used to distinguish between positive and negative pins for anti-reverse installation; a connecting component, which is connected to the anti-reverse component and is used to stably install the electrolytic capacitor on the circuit board.

[0007] Furthermore, the pre-fixing component includes: a clamping plate, which is arranged on one side of the positive electrode sheet and the negative electrode sheet, and is used to make the electrolytic paper and the aluminum foil tightly attached to and fixed on the positive electrode sheet and the negative electrode sheet, and a connecting part is provided between the bottom of the clamping plate and the positive electrode sheet and the negative electrode sheet, and a clamping gap is formed between the clamping plate and the positive electrode sheet and the negative electrode sheet, and the clamping gap is used to fix the electrolytic paper and the aluminum foil; an opening part, which is arranged at the top of the clamping plate, and is used to facilitate opening the clamping plate to enlarge the clamping gap.

[0008] Furthermore, the clamping plate is an arc-shaped structure, and the clamping plate has a plurality of groups of clamping blocks for abutting against the electrolytic paper and the aluminum foil distributed equidistantly along its length direction.

[0009] Furthermore, the material of the clamping plate is the same as that of the positive electrode sheet and the negative electrode sheet, and the end of the clamping block that contacts the electrolytic paper and the aluminum foil is cylindrical.

[0010] Furthermore, the re-fixing assembly includes: a fastening plate, which is arranged on the positive electrode sheet and the negative electrode sheet; and a moving part, which is arranged between the fastening plate and the positive electrode sheet and the negative electrode sheet, and is used to move the fastening plate to fasten the electrolytic paper and the aluminum foil.

[0011] Furthermore, the anti-reverse component includes: an anti-reverse block, which is arranged at the bottom of the electrolytic capacitor body; a sharp corner portion, which is arranged on one side of the anti-reverse block, and a flat portion is provided on the side of the anti-reverse block opposite to the sharp corner portion, and the two ends of the flat portion are used to distinguish between positive and negative pins.

[0012] Furthermore, a triangular support is formed between the anti-reverse block and the positive and negative pins, so as to make the connection between the electrolytic capacitor and the circuit board more stable.

[0013] Furthermore, the connection component includes: a connection column, which is connected to the anti-reverse block and is used to contact the circuit board, and the bottom of the connection column is fixedly connected with the contact block; a connection cover, which is slidably arranged on the connection column, and the connection cover is connected to the contact block, and is used to make the connection cover buckle the contact block and fix the connection column on the circuit board, and the two sides of the connection cover are respectively provided with hanging ears.

[0014] The technical solution provided by this application has at least the following technical effects or advantages:

[0015] (1) The present application adopts a fixing unit, uses a clamping plate to stick the electrolytic paper and the aluminum foil to the positive electrode sheet and the negative electrode sheet, and uses a fastening plate to further connect the electrolytic paper and the aluminum foil to the positive electrode sheet and the negative electrode sheet. Therefore, the problem that the existing positive electrode sheet and the negative electrode sheet become loose with the electrolytic paper and the aluminum foil after long-term use is effectively solved, thereby affecting the use of the electrolytic capacitor.

[0016] (2) The present application adopts an anti-reverse unit to distinguish the positive and negative pins by setting an anti-reverse block so that they can be installed correctly. In order to make the positive and negative pins installed on the circuit board more stable, the connecting cover is also welded to the circuit board. Therefore, the problem of the existing positive and negative pins being installed reversely during the installation process, causing circuit failure, is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of this application;

[0018] Figure 2 This is a structural diagram of the entire application from another angle;

[0019] Figure 3 This is a schematic diagram of the structure of the fixed unit part of this application;

[0020] Figure 4 This is a structural schematic diagram of the fixed unit part of the present application from another angle;

[0021] Figure 5 for Figure 4 The enlarged structural diagram at A in the middle;

[0022] Figure 6 for Figure 4 The enlarged structural diagram at B in the middle;

[0023] Figure 7 This is a structural schematic diagram of the anti-reverse unit of this application.

[0024] In the figure: 100, electrolytic capacitor body; 101, positive electrode sheet; 102, negative electrode sheet; 1, fixing unit; 11, pre-fixing component; 111, clamping plate; 112, connecting part; 113, clamping gap; 114, opening part; 115, clamping block; 12, re-fixing component; 121, fastening plate; 122, moving part; 2, anti-reverse unit; 21, anti-reverse component; 211, anti-reverse block; 212, sharp corner part; 213, plane part; 22, connecting component; 221, connecting column; 222, contact block; 223, connecting cover; 224, hanging ear. DETAILED DESCRIPTION

[0025] The embodiments of the present application disclose a chip-type solid electrolytic capacitor. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Reference Figure 1-Figure 7 , a chip-type solid electrolytic capacitor, comprising an electrolytic capacitor body 100 and a positive electrode sheet 101 and a negative electrode sheet 102 arranged on the capacitor body, and also comprising a fixing unit 1 arranged on the positive electrode sheet 101 and the negative electrode sheet 102, used to make the electrolytic paper and the aluminum foil tightly wound on the positive electrode sheet 101 and the negative electrode sheet 102 respectively, to prevent the electrolytic paper and the aluminum foil from loosening, the fixing unit 1 comprising two sides symmetrically arranged on the positive electrode sheet 101 and the negative electrode sheet 102 in the width direction, respectively, and used to make the electrolytic paper and the aluminum foil be pre-fixed in position during installation and be able to make them close to the positive electrode sheet 101 and the negative electrode sheet 102, and a re-fixing component 12 is respectively arranged between the two groups of pre-fixing components 11, which is used to fix the electrolytic paper and the aluminum foil on the positive electrode sheet 101 and the negative electrode sheet 102 when the positive electrode sheet 101 and the negative electrode sheet 102 become loose after long-term use;

[0028] The electrolytic capacitor body 100 is the same as the existing one, with an aluminum shell on the outside, and electrolytic paper and aluminum foil are respectively wound on the positive electrode sheet 101 and the negative electrode sheet 102. After the winding is completed, the positive electrode sheet 101 and the negative electrode sheet 102 and the wound electrolytic paper and aluminum foil are completely wrapped with electrolytic paper to form a cylindrical shape. These are all existing technologies and will not be described in detail here.

[0029] The pre-fixing component 11 includes a clamping plate 111 disposed on one side of the positive electrode sheet 101 and the negative electrode sheet 102, which is used to make the electrolytic paper and the aluminum foil close to and fixed on the positive electrode sheet 101 and the negative electrode sheet 102, and a connecting portion 112 is provided between the bottom of the clamping plate 111 and the positive electrode sheet 101 and the negative electrode sheet 102, the connecting portion 112 has strength, and the clamping plate 111 has elasticity, which can facilitate the deformation of the clamping plate 111 to fix the electrolytic paper and the aluminum foil, and the clamping plate 111 and the positive electrode sheet 101 and the negative electrode sheet 102 are connected. A clamping gap 113 is formed between the positive electrode sheet 101 and the negative electrode sheet 102, and the clamping gap 113 is used to fix the electrolytic paper and the aluminum foil. The top of the clamping plate 111 is fixedly connected with an opening portion 114 for conveniently opening the clamping plate 111 to enlarge the clamping gap 113. The clamping plate 111 is an arc-shaped structure, and the clamping plate 111 has multiple groups of clamping blocks 115 for contacting the electrolytic paper and the aluminum foil distributed equidistantly along its length direction. The material of the clamping plate 111 is the same as that of the positive electrode sheet 101 and the negative electrode sheet 102, and the end of the clamping block 115 that contacts the electrolytic paper and the aluminum foil is cylindrical;

[0030] The re-fixing assembly 12 includes a fastening plate 121 disposed on the positive electrode sheet 101 and the negative electrode sheet 102, and a moving part 122 for moving the fastening plate 121 to fasten the electrolytic paper and the aluminum foil is disposed between the fastening plate 121 and the positive electrode sheet 101 and the negative electrode sheet 102. The moving part 122 can be a screw and a limit column, so that the fastening plate 121 moves forward or away from the electrolytic paper and the aluminum foil, and the shape of the fastening plate 121 is an I-shaped shape, which can press the top and bottom of the electrolytic paper and the aluminum foil;

[0031] When winding the electrolytic paper and the aluminum foil, the opening portion 114 is lifted up, so that the clamping plate 111 is unfolded with the connecting portion 112 as a fixed point in a direction away from the positive electrode sheet 101 and the negative electrode sheet 102. When unfolding, the clamping gap 113 becomes larger, which is convenient for the electrolytic paper and the aluminum foil to be put in. After the electrolytic paper and the aluminum foil are put in, the force on the opening portion 114 is released, so that the clamping plate 111 rebounds, and after the rebound, the electrolytic paper and the aluminum foil are point-positioned by the clamping blocks. Since a large number of clamping blocks are provided, the electrolytic paper and the aluminum foil can be fixed, which is elastic fixing.

[0032] When placing the two sets of clamping plates 111, it is necessary to pass the electrolytic paper and the aluminum foil through the fastening plate 121, and make the fastening plate 121 adjustable through the moving part 122 to fix the electrolytic paper and the aluminum foil. After both are fixed, the electrolytic paper and the aluminum foil are wound around the clamping plate 111 and the fastening plate 121 together, so that the electrolytic paper and the aluminum foil are fixed to the positive electrode sheet 101 and the negative electrode sheet 102 more firmly.

[0033] The bottom of the electrolytic capacitor body 100 is provided with an anti-reverse unit 2 for distinguishing positive and negative pins and fixing the electrolytic capacitor body. The anti-reverse unit 2 includes an anti-reverse component 21 provided at the bottom of the electrolytic capacitor body 100 for distinguishing positive and negative pins so as to prevent reverse installation. The anti-reverse component 21 is connected to a connection component 22 for stably installing the electrolytic capacitor on the circuit board.

[0034] The anti-reverse assembly 21 includes an anti-reverse block 211 fixedly arranged at the bottom of the electrolytic capacitor body 100, a sharp corner portion 212 is arranged on one side of the anti-reverse block 211, and a plane portion 213 is arranged on the side of the anti-reverse block 211 opposite to the sharp corner portion 212, and both ends of the plane portion 213 are used to distinguish between positive and negative pins, and a triangular support is formed between the anti-reverse block 211 and the positive and negative pins, and the triangular support is used to make the connection between the electrolytic capacitor and the circuit board more stable;

[0035] The connection assembly 22 includes a connection column 221 connected to the anti-reverse block 211 for contacting the circuit board, and a contact block 222 is fixedly connected to the bottom of the connection column 221, and a connection cover 223 is slidably connected to the connection column 221, and the connection cover 223 is connected to the contact block 222, and the connection cover 223 is used to make the connection cover 223 buckle the contact block 222 and fix the connection column 221 on the circuit board, and the two sides of the connection cover 223 are respectively provided with hanging ears 224, and the hanging ears 224 can increase the contact area between the connection cover 223 and the circuit board;

[0036] When installing, the pointed corner 212 of the anti-coupling column is facing outward, with the positive pin on the left and the negative pin on the right, and the electrolytic capacitor body 100 is welded to the circuit board, so that the positive and negative pins can be distinguished to avoid installation errors. After installation, the connection cover 223 is slid to the position of the contact block 222, and the overlapping edges of the connection cover 223 are welded, so that the connection between the electrolytic capacitor body 100 and the circuit board forms a triangular support, thereby making the connection more stable.

[0037] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0038] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A chip-type solid electrolytic capacitor, comprising an electrolytic capacitor body (100) and a positive electrode sheet (101) and a negative electrode sheet (102) arranged on the capacitor body, characterized in that: Also includes: A fixing unit (1) is provided on the positive electrode sheet (101) and the negative electrode sheet (102) and is used to tightly wind the electrolytic paper and the aluminum foil on the positive electrode sheet (101) and the negative electrode sheet (102) respectively, so as to prevent the electrolytic paper and the aluminum foil from loosening; The fixing unit (1) comprises: Pre-fixing components (11) are symmetrically arranged on both sides of the positive electrode sheet (101) and the negative electrode sheet (102) in the width direction, and are used to pre-fix the positions of the electrolytic paper and the aluminum foil during installation and to make them closely attached to the positive electrode sheet (101) and the negative electrode sheet (102); The re-fixing components (12) are respectively arranged between the two groups of pre-fixing components (11) and are used to fix the electrolytic paper and the aluminum foil on the positive electrode sheet (101) and the negative electrode sheet (102) even if the positive electrode sheet (101) and the negative electrode sheet (102) become loose after long-term use; An anti-reverse unit (2) is arranged at the bottom of the electrolytic capacitor body (100) and is used to distinguish between positive and negative pins and to fix the electrolytic capacitor body in place; The anti-reverse unit (2) comprises: An anti-reverse assembly (21) is arranged at the bottom of the electrolytic capacitor body (100) and is used to distinguish between positive and negative pins for anti-reverse installation; A connection component (22) connected to the anti-reverse component (21) and used to stably mount the electrolytic capacitor on the circuit board; The anti-reverse component (21) comprises: An anti-reverse block (211) is arranged at the bottom of the electrolytic capacitor body (100); The pointed corner portion (212) is provided on one side of the anti-reverse block (211), and a plane portion (213) is provided on the anti-reverse block (211) on a side opposite to the pointed corner portion (212), and two ends of the plane portion (213) are used to distinguish between positive and negative pins; The connection component (22) comprises: A connecting column (221) is connected to the anti-reverse block (211) and is used to contact the circuit board, and the bottom of the connecting column (221) is fixedly connected to the contact block (222); The connection cover (223) is slidably disposed on the connection column (221), and the connection cover (223) is connected to the contact block (222) so as to enable the connection cover (223) to buckle the contact block (222) and fix the connection column (221) on the circuit board. Hanging ears (224) are respectively provided on both sides of the connection cover (223).

2. The chip-type solid electrolytic capacitor according to claim 1, characterized in that: The pre-fixing assembly (11) comprises: A clamping plate (111) is arranged on one side of the positive electrode sheet (101) and the negative electrode sheet (102), and is used to make the electrolytic paper and the aluminum foil closely attached to and fixed on the positive electrode sheet (101) and the negative electrode sheet (102); a connecting portion (112) is provided between the bottom of the clamping plate (111) and the positive electrode sheet (101) and the negative electrode sheet (102); a clamping gap (113) is formed between the clamping plate (111) and the positive electrode sheet (101) and the negative electrode sheet (102); and the clamping gap (113) is used to fix the electrolytic paper and the aluminum foil; The opening portion (114) is disposed on the top of the clamping plate (111) and is used to facilitate opening the clamping plate (111) to increase the clamping gap (113).

3. The chip-type solid electrolytic capacitor according to claim 2, characterized in that: The clamping plate (111) is an arc-shaped structure, and the clamping plate (111) has a plurality of groups of clamping blocks (115) equidistantly distributed along its length direction for contacting the electrolytic paper and the aluminum foil.

4. The chip-type solid electrolytic capacitor according to claim 3, characterized in that: The material of the clamping plate (111) is the same as that of the positive electrode sheet (101) and the negative electrode sheet (102), and the end of the clamping block (115) in contact with the electrolytic paper and the aluminum foil is cylindrical.

5. The chip-type solid electrolytic capacitor according to claim 1, characterized in that: The re-fixing component (12) comprises: A fastening plate (121) is provided on the positive electrode sheet (101) and the negative electrode sheet (102); The moving part (122) is arranged between the fastening plate (121) and the positive electrode sheet (101) and the negative electrode sheet (102), and is used to move the fastening plate (121) to fasten the electrolytic paper and the aluminum foil.

6. The chip-type solid electrolytic capacitor according to claim 1, characterized in that: A triangular support is formed between the anti-reverse block (211) and the positive and negative pins, and is used to make the connection between the electrolytic capacitor and the circuit board more stable.

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