Packaging structure of electrolytic capacitor

Abstract

The utility model discloses a packaging structure of an electrolytic capacitor, which is used for packaging an electric core of the electrolytic capacitor and comprises a shell, an end cover, an insulation sealing piece, a first current collector, a second current collector, a first riveting piece, a second riveting piece, a first leading-out piece and a second leading-out piece. The battery core is arranged in the shell, and the end cover covers the shell; the insulating sealing element is arranged outside the end cover; the first current collector and the second current collector are metal sheets, the first current collector is electrically connected with the positive electrode of the battery cell, and the second current collector is electrically connected with the negative electrode of the battery cell; the first current collector and the first lead-out piece are respectively riveted on the inner side and the outer side of the end cover through the first riveting piece, and the second current collector and the second lead-out piece are respectively riveted on the inner side and the outer side of the end cover through the second riveting piece. The battery cell is electrically connected with the outside through the first current collector and the second current collector, so that the welding part is not affected by external force, the battery is more durable, and the safety of the packaging structure is ensured.

Description

Technical Field

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

[0002] With the rapid development of fields such as portable electronic devices and electric vehicles, the demand for energy storage components such as electrolytic capacitors in various electronic devices, electric vehicles, and renewable energy systems is increasing day by day. The performance and safety of these energy storage components are directly related to the reliability and service life of the entire system. Their performance not only depends on their internal materials and structures, but also is closely related to the sealing, conductivity, insulation, and explosion-proof performance of their packaging structures.

[0003] Although the existing packaging technologies meet the usage requirements to a certain extent, there is still room for improvement in terms of sealing during the packaging process, reliability of electrical connection, and safety. Therefore, the utility model provides a packaging structure of an electrolytic capacitor to meet the requirements of modern electronic devices for high safety, long life, and high reliability. Summary of the Invention

[0004] The purpose of the utility model is to provide a packaging structure of an electrolytic capacitor to solve the problems raised in the above background art. To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A packaging structure of an electrolytic capacitor for packaging the core of an electrolytic capacitor, comprising a housing, an end cap, an insulating seal, a first current collector, a second current collector, a first riveting member, a second riveting member, a first lead-out member, and a second lead-out member; the core is arranged in the housing, and the end cap is covered with the housing; the insulating seal is arranged outside the end cap; the first current collector and the second current collector are metal sheets, the first current collector is electrically connected to the positive electrode of the core, and the second current collector is electrically connected to the negative electrode of the core; the first current collector and the first lead-out member are respectively riveted to the inner and outer sides of the end cap through the first riveting member, and the second current collector and the second lead-out member are respectively riveted to the inner and outer sides of the end cap through the second riveting member.

[0006] Further, the first current collector includes a first welding area and a first riveting area, and a first insulating member is arranged on the first welding area.

[0007] Further, the second current collector includes a second welding area, an intermediate transition area, and a second riveting area; a liquid passing hole is arranged in the second welding area, a riveting hole is arranged in the second riveting area, and an insulating layer is coated on the intermediate transition area.

[0008] Further, the encapsulation structure further includes a second insulating member that wraps the battery cell, the first current collector, and the second current collector.

[0009] Further, a first metal gasket is disposed between the first current collector and the first riveting member, and a second metal gasket is disposed between the second current collector and the second riveting member.

[0010] Further, an explosion-proof groove is provided at the bottom of the outer shell.

[0011] The beneficial effects of the present utility model are as follows: The present utility model realizes the electrical connection between the battery cell and the outside through the first current collector and the second current collector made of soft metal sheets, so that the welding part of the battery cell is not easily directly affected by external forces, making the connection of the welding part more stable, the battery more durable, more reliable, and capable of reducing the manufacturing cost of the first current collector and the second current collector; and the first current collector and the second current collector are connected and fixed to the end cover and the insulating seal through a riveting method, which can improve the production efficiency and reduce the production cost compared with the welding method; at the same time, the setting of the insulating seal realizes the sealing and insulation between the outer shell and the end cover, ensuring the safety of the encapsulation structure. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a cross-sectional view of the present utility model.

[0014] Figure 2 It is a structural schematic diagram of the present utility model.

[0015] Figure 3 It is a structural schematic diagram of the first current collector and the second current collector in the present utility model.

[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 Embodiments

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

[0018] In the present utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit that the indicated devices, elements or components 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 utility model can be understood according to specific circumstances.

[0020] In addition, the terms "mounted", "arranged", "provided with", "connected", "connected to" 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 also be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (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, elements or components. 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 the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in the specification of the present 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" used in the specification of the present 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] Such as Figure 1 and Figure 2As shown in the figure, a packaging structure of an electrolytic capacitor is used to package the core 100 of the electrolytic capacitor. The packaging structure includes a housing 1, an end cap 2, an insulating seal 3, a first current collector 4, a second current collector 5, a first riveting member 61, a second riveting member 62, a first lead-out member 71, and a second lead-out member 72. The core 100 is disposed in the housing 1, and the end cap 2 is covered with the housing 1. The insulating seal 3 is disposed outside the end cap 2. The first current collector 4 and the second current collector 5 are metal foils. The first current collector 4 is electrically connected to the positive electrode of the core 100, and the second current collector 5 is electrically connected to the negative electrode of the core 100. The first current collector 4 and the first lead-out member 71 are respectively riveted to the inner and outer sides of the end cap 2 through the first riveting member 61, and the second current collector 5 and the second lead-out member 72 are respectively riveted to the inner and outer sides of the end cap 2 through the second riveting member 62.

[0025] As an example, the packaging structure of this embodiment includes a housing 1, an end cap 2, an insulating seal 3, a first current collector 4, a second current collector 5, a first riveting member 61, a second riveting member 62, a first lead-out member 71, and a second lead-out member 72. The core 100 is disposed in the housing 1. The end cap 2 is used to cover the housing 1, and the end cap 2 is fixed by curling and sealing through the opening part of the housing 1 to form the main housing for packaging the core 100. The insulating seal 3 is fixedly attached to the exposed surface of the end cap 2 to achieve the sealing and insulation between the housing 1 and the end cap 2. The first current collector 4 and the second current collector 5 are made of metal foil material. One end of the first current collector 4 is welded to the positive electrode of the core 100 to achieve electrical connection, and the other end is riveted to the inner side of the end cap 2 through the first riveting member 61. At the same time, the first lead-out member 71 is riveted to the outer sides of the end cap 2 and the insulating seal 3 through the first riveting member 61 to lead out the positive electrode of the core 100 to the outside of the packaging structure. One end of the second current collector 5 is welded to the negative electrode of the core 100 to achieve electrical connection, and the other end is riveted to the inner side of the end cap 2 through the second riveting member 62. At the same time, the second lead-out member 72 is riveted to the outer sides of the end cap 2 and the insulating seal 3 through the second riveting member 62 to lead out the negative electrode of the core 100 to the outside of the packaging structure, thereby realizing the electrical connection between the core 100 and the outside.

[0026] In this embodiment, the electrical connection between the core 100 and the outside is realized by using the first current collector 4 and the second current collector 5 made of soft metal foils, so that the welding part of the core 100 is not easily directly affected by external forces, making the connection of the welding part more stable, the battery more durable, more reliable, and capable of reducing the manufacturing cost of the first current collector 4 and the second current collector 5. And the first current collector 4 and the second current collector 5 are connected and fixed to the end cap 2 and the insulating seal 3 by riveting, which can improve the production efficiency and reduce the production cost compared with the welding method. At the same time, the setting of the insulating seal 3 realizes the sealing and insulation between the housing 1 and the end cap 2, ensuring the safety of the packaging structure.

[0027] In one embodiment, the first current collector 4 includes a first welding area 41 and a first riveting area 42, and a first insulating member 43 is provided on the first riveting area 42.

[0028] As an example, the first current collector 4 includes a first welding area 41 for welding with the positive electrode of the battery cell 100 and a first riveting area 42 for riveting with the end cap 2; a first insulating member 43 is provided on the first welding area 41 to achieve insulation between the first current collector 4 and the second current collector 5, as well as between the positive and negative electrodes of the battery cell 100.

[0029] In one embodiment, referring to Figure 3 , the second current collector 5 includes a second welding area 51, an intermediate transition area 52, and a second riveting area 53; a liquid passing hole 511 is provided in the second welding area 51, a riveting hole 531 is provided in the second riveting area 53, and the intermediate transition area 52 is coated with an insulating layer.

[0030] As an example, the second current collector 5 includes a second welding area 51, an intermediate transition area 52, and a second riveting area 53; the second welding area 51 is used for welding with the negative electrode of the battery cell 100, and a liquid passing hole 511 is provided in the second welding area 51. During the process of injecting the electrolyte, the liquid passing hole 511 can make it more convenient for the electrolyte to enter the interior of the battery cell; a riveting hole 531 is provided in the second riveting area 53 for riveting with the end cap 2; the intermediate transition area 52 is coated with an insulating layer to achieve insulation between the negative electrode of the battery cell 100 and the outer shell 1. In addition, the first welding area 41 and the second welding area 51 in this embodiment can optionally adopt a circular shape design, which can increase the contact area and make the welding more stable; in other embodiments, other shape designs can also be selected for welding, such as rectangular, oval, strip, etc.

[0031] In one embodiment, the encapsulation structure further includes a second insulating member 8, and the second insulating member 8 wraps the battery cell 100, the first current collector 4, and the second current collector 5.

[0032] As an example, a second insulating member 8 is provided inside the outer shell 1, and the second insulating member 8 wraps the battery cell 100, the first current collector 4, and the second current collector 5 to prevent the first current collector 4 and the second current collector 5 from being in electrical contact with the outer shell 1.

[0033] In one embodiment, a first metal gasket 91 is provided between the first current collector 4 and the first riveting member 61, and a second metal gasket 92 is provided between the second current collector 5 and the second riveting member 62. The first metal gasket 91 and the second metal gasket 92 can prevent the current collector from being scratched or cracked during riveting, and can also increase the riveting area of the current collector and increase the riveting strength.

[0034] In one embodiment, an explosion-proof groove is provided at the bottom of the housing 1. The function of the explosion-proof groove is that if the battery fails, a large amount of gas generated inside the battery will first burst through the explosion-proof groove and then leak out of the battery, preventing the gas from bursting the battery and causing an explosion.

[0035] 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.

[0036] As described above, it is only a preferred embodiment of the present utility model, and it does 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 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 based on 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 packaging structure for an electrolytic capacitor, used for packaging a cell (100) of an electrolytic capacitor, characterized in that: The packaging structure comprises a housing (1), an end cover (2), an insulating seal (3), a first current collector (4), a second current collector (5), a first rivet (61), a second rivet (62), a first lead-out piece (71) and a second lead-out piece (72); the battery cell (100) is arranged in the housing (1), and the end cover (2) covers the housing (1); the insulating seal (3) is arranged on the outside of the end cover (2); the first current collector (4) and the second current collector (5) are connected to each other. 5) is a metal sheet, the first current collector (4) is electrically connected to the positive electrode of the battery cell (100), and the second current collector (5) is electrically connected to the negative electrode of the battery cell (100); the first current collector (4) and the first lead-out piece (71) are riveted to the inner and outer sides of the end cover (2) respectively through the first rivet (61), and the second current collector (5) and the second lead-out piece (72) are riveted to the inner and outer sides of the end cover (2) respectively through the second rivet (62).

2. The packaging structure according to claim 1, characterized in that: The first current collector (4) comprises a first welding area (41) and a first riveting area (42), and a first insulating member (43) is arranged on the first welding area (41).

3. The packaging structure according to claim 2, characterized in that: The second current collector (5) comprises a second welding area (51), an intermediate transition area (52) and a second riveted area (53); the second welding area (51) is provided with a liquid passage hole (511), the second riveted area (53) is provided with a riveted hole (531), and the intermediate transition area (52) is coated with an insulating layer.

4. The packaging structure according to claim 2, characterized in that: The packaging structure further comprises a second insulating member (8), wherein the second insulating member (8) wraps the battery core (100), the first current collector (4) and the second current collector (5).

5. The packaging structure according to claim 1, characterized in that: A first metal gasket (91) is provided between the first current collector (4) and the first rivet (61), and a second metal gasket (92) is provided between the second current collector (5) and the second rivet (62).

6. The packaging structure according to claim 1, characterized in that: An explosion-proof groove is provided at the bottom of the housing (1).

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