All-tab electrolytic capacitor packaging structure

Abstract

The utility model discloses a full-tab electrolytic capacitor packaging structure, which comprises a shell, an end cover, an electrode terminal, a battery cell, a first current collector and a second current collector, the battery cell is arranged in the shell; the battery cell comprises a first electrode and a second electrode, and the first electrode is electrically connected with the electrode terminal through the first current collector; the end cover is arranged at the upper end of the shell, and the first current collector is riveted and fixed with the end cover through the electrode terminal; the end cover is provided with an insulation sealing piece, so that the end cover is respectively in insulation sealing with the first current collector and the electrode terminal; the second current collector is connected with the lower end of the shell, and the second electrode is electrically connected with the second current collector. According to the utility model, the structure is novel, the design is reasonable, the connection and fixation of the end cover, the electrode terminal and the first current collector are realized through a riveting connection mode, the packaging process is simplified, the operation convenience of production and processing is improved, and the production quality is more controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic capacitors, in particular to a packaging structure of a full-terminal electrolytic capacitor. Background Art

[0002] Due to its characteristics such as large capacitance and low equivalent series resistance (ESR), electrolytic capacitors are widely used in power supply filtering, signal coupling, energy storage and other aspects. With the development trend of miniaturization and high performance of electronic devices, the demand for electrolytic capacitors is increasing day by day. The traditional electrolytic capacitor is often more complex in the design of the packaging structure, increasing the operation difficulty of packaging and making it difficult to control its production quality. Summary of the Invention

[0003] The purpose of the utility model is to provide a packaging structure of a full-terminal electrolytic capacitor to solve the problems put forward in the above background art. To achieve the above purpose, the utility model provides the following technical solutions:

[0004] A packaging structure of a full-terminal electrolytic capacitor includes a housing, an end cap, electrode terminals, an electrode core, a first current collector and a second current collector; the electrode core is arranged in the housing; the electrode core includes a first electrode and a second electrode, and the first electrode is electrically connected to the electrode terminal through the first current collector; the end cap is arranged at the upper end of the housing, and the first current collector is riveted and fixed to the end cap through the electrode terminal; the end cap is provided with an insulating seal to achieve insulating sealing between the end cap and the first current collector and the electrode terminal respectively; the second current collector is connected to the lower end of the housing, and the second electrode is electrically connected to the second current collector.

[0005] Further, the electrode terminal includes a riveting part and a plug, the riveting part is provided with a riveting portion and a liquid injection hole, and the riveting portion is riveted and fixed to the first current collector and the end cap; the plug seals the liquid injection hole.

[0006] Further, the riveting part is also provided with a welding part, and the plug is welded and fixed to the welding part.

[0007] Further, a sealing plug is also arranged in the liquid injection hole.

[0008] Further, a slope is arranged in the liquid injection hole.

[0009] Further, the housing is provided with an explosion-proof groove.

[0010] The beneficial effect of the utility model lies in that: the structure of the utility model is novel and reasonable. The connection and fixation between the end cap, the electrode terminal and the first current collector are realized through the riveting connection method, which simplifies the packaging process, improves the operation convenience of production and processing, and makes the production quality more controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a cross-sectional view of the present invention.

[0013] Figure 2 It is a structural schematic diagram of the present invention.

[0014] Figure 3 It is a structural schematic diagram of the riveting part in the present invention.

[0015] Figure 4 It is a structural schematic diagram of the end cover and the insulating seal in the present invention.

[0016] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner that does not affect the understanding of the reader. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0018] In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0019] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0020] In addition, the terms "installed", "set up", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0021] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0022] It should also be understood that the terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. As used in the specification of this utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0023] It should be further understood that the term "and / or" used in the specification of this utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0024] As Figures 1 to 4 shown, a full-tab electrolytic capacitor packaging structure includes a housing 1, an end cap 2, electrode terminals 3, a core 4, a first current collector 5, and a second current collector 6; the core 4 is disposed inside the housing 1; the core 4 includes a first electrode 41 and a second electrode 42, and the first electrode 41 is electrically connected to the electrode terminal 3 through the first current collector 5; the end cap 2 is disposed at the upper end of the housing 1, and the first current collector 5 is riveted and fixed to the end cap 2 through the electrode terminal 3; the end cap 2 is provided with an insulating seal 7 to achieve insulating sealing between the end cap 2 and the first current collector 5 and the electrode terminal 3 respectively; the second current collector 6 is connected to the lower end of the housing 1, and the second electrode 42 is electrically connected to the second current collector 6.

[0025] As an example, the applicable scope of the encapsulation structure of this embodiment includes but is not limited to lithium-ion batteries or supercapacitors. The battery cell 4 is a wound full-tab battery cell 4. A first electrode 41 is arranged at the upper end of the battery cell 4, and a second electrode 42 is arranged at the lower end. Among them, the first electrode 41 is electrically connected to the first current collector 5, and the electrode terminal 3 is also connected to the first current collector 5, thereby realizing the electrical connection between the first electrode 41 and the electrode terminal 3; the second electrode 42 is electrically connected to the second current collector 6. When the battery cell 4 is installed in the outer shell 1, the second current collector 6 is connected to the lower end of the outer shell 1 and extends out of the bottom of the outer shell 1 to realize the connection of the second electrode 42 to the outside. The first electrode 41 is connected to the outside through the first current collector 5 and the electrode terminal 3 in sequence; the first current collector 5 is riveted and fixed to the end cap 2 through the electrode terminal 3, so that the end cap 2 closes the upper end of the outer shell 1, and the battery cell 4, the first current collector 5 and the second current collector 6 are pressed tightly in the outer shell 1; to prevent the first electrode 41 from forming an electrical connection through the first current collector 5, the electrode terminal 3, the end cap 2, the outer shell 1 and communicating to the second current collector 6 and the second electrode 42, an insulating seal 7 is provided on the end cap 2 to insulate and seal the first current collector 5 from the end cap 2, and at the same time insulate and seal the electrode terminal 3 from the end cap 2, thereby realizing the insulation between the first electrode 41 and the second electrode 42. The structure of this embodiment is novel and reasonable. The connection and fixation of the end cap with the electrode terminal and the first current collector are realized through the riveting connection method, which simplifies the encapsulation process, improves the operation convenience of production and processing, and makes the production quality more controllable.

[0026] In some embodiments, referring to Figures 1 to 3 , the electrode terminal 3 includes a riveting part 31 and a plug 32. The riveting part 31 is provided with a riveting portion 311 and a liquid injection hole 312. The riveting portion 311 is riveted and fixed to the first current collector 5 and the end cap 2; the plug 32 seals the liquid injection hole 312.

[0027] As an example, the riveting part 31 is arranged in a circular structure, and a grooved opening for riveting, i.e., the riveting portion 311, is arranged on its outer periphery; a riveting part 31 installation hole is opened in the end cap 2 for installing the riveting part 31. The insulating seal is wrapped around the outer periphery of the riveting part 31 installation hole of the end cap 2, so that when the first current collector 5 and the end cap 2 are riveted to the riveting part 31 through the riveting portion 311, the end cap 2 realizes insulation and sealing with the first current collector 5 and the electrode terminal 3 respectively. At the same time, a liquid injection hole 312 is provided on the riveting part 31 for injecting electrolyte into the battery cell 4 in the outer shell 1 from the outside; after the injection is completed, the plug 32 is used to block the liquid injection hole 312 to achieve sealing.

[0028] In some embodiments, referring to Figure 3 , the riveting part 31 is further provided with a welding part 313, and the plug 32 is welded and fixed to the welding part 313.

[0029] As an example, a protruding annular structure is provided on the outer edge of the plug 32 for welding with the welding part 313, increasing the area of the welding region and improving the sealing effect of the liquid injection hole 312.

[0030] In some embodiments, referring to Figure 1 , a sealing plug 8 is further provided in the liquid injection hole 312.

[0031] As an example, during the encapsulation process, after the liquid injection is completed, the sealing plug 8 is first inserted into the liquid injection hole 312, and then the plug 32 is welded to the riveting part 31 to further improve the sealing performance of the liquid injection hole 312.

[0032] In some embodiments, referring to Figure 1 and Figure 3 , a slope is provided in the liquid injection hole 312.

[0033] As an example, a slope that contracts inward into the hole is provided in the middle section of the liquid injection hole 312 to position and fix the sealing plug 8 and prevent it from sliding down excessively.

[0034] In some embodiments, referring to Figure 2 , the outer shell 1 is provided with an explosion-proof groove 11.

[0035] As an example, when the internal pressure of the battery is too high, the explosion-proof groove 11 cracks and sprays out the electrolyte to achieve pressure relief and prevent the battery from exploding.

[0036] For the embodiments of the present utility model, it should also be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0037] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. The protection scope of the present utility model should be subject to the protection scope of the claims. Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the technical solution scope of the present utility model, can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A full-ear electrolytic capacitor packaging structure, characterized in that: The invention comprises a shell (1), an end cover (2), an electrode terminal (3), a battery cell (4), a first current collector (5) and a second current collector (6); the battery cell (4) is arranged in the shell (1); the battery cell (4) comprises a first electrode (41) and a second electrode (42), the first electrode (41) being electrically connected to the electrode terminal (3) via the first current collector (5); the end cover (2) is arranged at the upper end of the shell (1), the first current collector (5) being riveted and fixed to the end cover (2) via the electrode terminal (3); the end cover (2) is provided with an insulating seal (7) so that the end cover (2) is respectively insulated and sealed with the first current collector (5) and the electrode terminal (3); the second current collector (6) is connected to the lower end of the shell (1), and the second electrode (42) is electrically connected to the second current collector (6).

2. The full-tab electrolytic capacitor packaging structure according to claim 1, characterized in that: The electrode terminal (3) comprises a rivet (31) and a plug (32); the rivet (31) is provided with a rivet portion (311) and a liquid injection hole (312); the rivet portion (311) is riveted and fixed to the first current collector (5) and the end cover (2); and the plug (32) seals the liquid injection hole (312).

3. The full-tab electrolytic capacitor packaging structure according to claim 2, characterized in that: The rivet (31) is also provided with a welding portion (313), and the plug (32) is fixed to the welding portion (313) by welding.

4. The full-tab electrolytic capacitor packaging structure according to claim 3, characterized in that: A sealing plug (8) is also provided in the liquid injection hole (312).

5. The full-tab electrolytic capacitor packaging structure according to claim 4, characterized in that: The liquid injection hole (312) is provided with a slope.

6. The full-tab electrolytic capacitor packaging structure according to claim 1, characterized in that: The housing (1) is provided with an explosion-proof groove (11).

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