Shell sealing structure and energy storage device

Abstract

The utility model relates to the technical field of energy storage devices, and discloses a shell sealing structure and an energy storage device, the shell sealing structure comprises a lower shell, the inner wall circumferential surface of the lower shell is a curved surface extending along the vertical direction; the upper cover is provided with an inserting part used for being inserted into the lower shell in the vertical direction, the periphery of the inserting part is provided with an annular protruding part, and the annular protruding part is connected with an elastic annular check ring used for abutting against the circumferential face of the inner wall of the lower shell; and when the upper cover is inserted into the lower shell, a glue storage groove for storing sealing glue is formed among the peripheral surface of the upper cover, the peripheral surface of the inner wall of the lower shell, the annular lug boss and the elastic annular check ring. According to the shell sealing structure and the energy storage device, the good sealing effect of the energy storage device can be kept in a longer time period.

Description

Technical Field

[0001] This utility model relates to the field of energy storage device technology, and in particular to a shell sealing structure and an energy storage device. Background Technology

[0002] Current energy storage devices generally consist of a housing, which houses the battery cells, control modules, and other necessary components.

[0003] The casing typically consists of a lower casing and an upper cover. A ring seal is usually used to seal the lower casing and upper cover to prevent external moisture or dust from entering the inner cavity of the lower casing and affecting the cell assembly's operation. However, this sealing structure has certain drawbacks. After prolonged use, the ring seal is prone to aging, resulting in poor sealing performance and impacting the safety of the energy storage device.

[0004] Therefore, it is necessary to design a shell sealing structure and energy storage device to help the energy storage device maintain a good sealing effect over a longer period of time.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a housing sealing structure and an energy storage device, which helps the energy storage device maintain a good sealing effect over a longer period of time.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A housing sealing structure, comprising:

[0009] The lower shell has an inner circumferential surface that is a curved surface extending in the vertical direction.

[0010] The upper cover is provided with an insertion part for vertical insertion into the lower shell. The outer periphery of the insertion part has an annular protrusion, and the annular protrusion is connected to an elastic annular retaining ring for abutting against the inner wall circumferential surface of the lower shell.

[0011] When the upper cover is inserted into the lower shell, a glue storage groove for storing sealant is formed between the outer peripheral surface of the upper cover, the inner peripheral surface of the lower shell, the annular protrusion, and the elastic annular retaining ring.

[0012] Optionally, the bottom end of the top cover forms a mounting groove, the elastic annular retaining ring is mounted on the mounting groove, and the elastic annular retaining ring is located on the bottom side of the annular protrusion and protrudes from the annular protrusion;

[0013] When the upper cover is inserted into the lower shell, the annular protrusion does not abut against the inner circumferential surface of the lower shell.

[0014] Optionally, a connecting protrusion is formed on the outer periphery of the upper cover, and a plurality of connecting protrusions are provided, wherein the connecting protrusions are provided with transverse connecting threaded holes;

[0015] The lower shell has a through connection hole corresponding to the transverse connection threaded hole. Threaded connectors are sequentially inserted into the connection hole and the transverse connection threaded hole to connect the lower shell and the upper cover.

[0016] Optionally, the upper cover is further provided with an extension protrusion, and the extension protrusion protrudes from the inner wall of the upper cover;

[0017] The extension protrusion is provided in a plurality of ways, and the plurality of extension protrusions correspond one-to-one with the plurality of connecting protrusions, and the center lines of the corresponding extension protrusions and connecting protrusions coincide with each other.

[0018] The transverse connecting threaded hole portion is located within the extended protrusion.

[0019] Optionally, an injection inlet is formed between two adjacent connecting protrusions.

[0020] Optionally, when the upper cover is inserted into the lower shell, the gap width between the annular protrusion and the inner circumferential surface of the lower shell is no greater than 0.2 mm.

[0021] Optionally, the elastic annular retaining ring is an annular sponge ring;

[0022] The annular sponge ring has a first sealing surface and a second sealing surface, the first sealing surface is parallel to the second sealing surface, the first sealing surface is attached to the outer peripheral surface of the upper cover, and the second sealing surface is used to abut against and fit the inner peripheral surface of the lower shell.

[0023] Optionally, the lower shell is barrel-shaped and has a top opening for inserting the upper cover.

[0024] Optionally, the mounting groove is a stepped groove or an annular groove.

[0025] An energy storage device includes a housing sealing structure as described in any of the preceding claims.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The housing sealing structure provided by this utility model inserts the upper cover into the lower cover, so that the annular protrusion and the elastic annular retaining ring form the bottom wall of the glue storage tank. At this time, glue can be injected into the glue storage tank to seal the gap between the inner circumference of the lower cover and the outer circumference of the upper cover, thereby maintaining a good seal on the housing. The housing sealing structure and energy storage device in this embodiment, through ingenious structural design, eliminate the need to use annular sealing rings to seal the lower cover and the upper cover, avoiding the problem of the annular sealing ring aging affecting the sealing effect of the housing, and enabling the energy storage device to maintain a good sealing effect over a longer period of time.

[0028] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a front view of the three-dimensional structure of the shell sealing structure provided in a semi-sectional state according to an embodiment of the present utility model;

[0031] Figure 2 This is a cross-sectional schematic diagram of the shell sealing structure provided in an embodiment of the present utility model;

[0032] Figure 3 yes Figure 2 An enlarged schematic diagram of the middle structure at position A.

[0033] Reference numerals: 1. Lower shell; 2. Upper cover; 201. Mounting groove; 202. Connecting protrusion; 203. Extending protrusion; 21. Annular protrusion; 3. Elastic annular retaining ring; 4. Threaded connector; 100. Glue storage tank. Detailed Implementation

[0034] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0035] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0036] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0037] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0038] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0039] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0040] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0041] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] Example 1

[0044] In view of the defects of the existing shell sealing structure, the applicant, based on years of practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, actively researched and innovated in order to create a technology that could solve the defects of the existing technology and make the shell sealing structure more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value was finally created.

[0045] Please refer to Figures 1 to 3 This utility model provides a housing sealing structure, including a lower shell 1, an upper cover 2, and an elastic annular retaining ring 3.

[0046] The inner circumferential surface of the lower shell 1 is a curved surface extending in the vertical direction; the upper cover 2 is provided with an insertion part for being inserted into the lower shell 1 in the vertical direction, and the outer circumference of the insertion part has an annular protrusion 21, and the annular protrusion 21 is connected to an elastic annular retaining ring 3 for abutting against the inner circumferential surface of the lower shell 1.

[0047] Specifically, when the upper cover 2 is inserted into the lower shell 1, a glue storage tank 100 for storing sealant is formed between the outer peripheral surface of the upper cover 2, the inner peripheral surface of the lower shell 1, the annular protrusion 21 and the elastic annular retaining ring 3. At this time, the elastic annular retaining ring 3 is squeezed between the upper cover 2 and the lower shell 1, that is, the elastic annular retaining ring 3 and the annular protrusion 21 constitute the bottom wall of the glue storage tank 100.

[0048] In this embodiment, the upper cover 2 is inserted into the lower shell 1, so that the annular protrusion 21 and the elastic annular retaining ring 3 form the bottom wall of the glue storage tank 100. At this time, glue can be injected into the glue storage tank 100. After the glue solidifies, it will seal the gap between the inner circumference of the lower shell 1 and the outer circumference of the upper cover 2, thereby keeping the shell well sealed.

[0049] The housing sealing structure in this embodiment avoids the problem of existing annular sealing rings aging and affecting the sealing effect of the housing through ingenious structural design. The stability of the glue after curing is better. Compared with annular sealing rings, it is not easy to deform and is not easy to squeeze out oil, which helps the energy storage device maintain a good sealing effect over a longer period of time.

[0050] It should be noted that the elastic annular retaining ring 3 can be arranged side by side with the annular protrusion 21, or it can be located on the top or bottom side of the annular protrusion 21.

[0051] Optionally, a mounting groove 201 is formed at the bottom of the upper cover 2, and an elastic annular retaining ring 3 is mounted on the mounting groove 201, thereby allowing the elastic annular retaining ring 3 to be more securely mounted on the upper cover 2. The elastic annular retaining ring 3 is located on one side of the bottom of the annular protrusion 21 and protrudes from the annular protrusion 21. It should be further noted that the mounting groove 201 is adjacent to the annular protrusion 21, thereby keeping the annular protrusion 21 and the elastic annular retaining ring 3 in close contact, avoiding glue leakage. In this embodiment, when the upper cover 2 is inserted into the lower shell 1, the annular protrusion 21 does not abut against the inner circumferential surface of the lower shell 1, that is, the elastic annular retaining ring 3 covers the gap between the annular protrusion 21 and the inner circumferential surface of the lower shell 1. The setting of the elastic annular retaining ring 3 makes it easier for the upper cover 2 to be inserted into the lower shell 1, which helps to avoid the situation where the inner circumferential surface of the lower shell 1 is scratched during the insertion of the upper cover 2 into the lower shell 1.

[0052] Optionally, a connecting protrusion 202 is formed on the outer periphery of the upper cover 2. Several connecting protrusions 202 are provided, and each connecting protrusion 202 has a transverse connecting threaded hole. A through connecting hole is provided on the lower shell 1 corresponding to the transverse connecting threaded hole. The threaded connector 4 is sequentially inserted into the connecting hole and the transverse connecting threaded hole to connect the lower shell 1 and the upper cover 2. Specifically, the threaded connector 4 is sequentially screwed into the connecting hole and the transverse connecting threaded hole to fix the upper cover 2 onto the lower shell 1. In this embodiment, the threaded connector 4 is arranged transversely, which does not affect the actual glue injection operation and also facilitates workers' observation of the glue volume.

[0053] Optionally, the upper cover 2 is further provided with an extension protrusion 203, which protrudes from the inner wall of the upper cover 2. Several extension protrusions 203 are provided, each corresponding to a number of connecting protrusions 202, with the center lines of the corresponding extension protrusions 203 and connecting protrusions 202 coinciding. The transverse connecting threaded hole is located within the extension protrusion 203 and does not penetrate through it. Specifically, the extension protrusion 203 allows for a deeper transverse connecting threaded hole, thereby improving the stability between the upper cover 2 and the lower shell 1. Furthermore, in this embodiment, the extension protrusion 203 is provided on the inner wall of the upper cover 2, eliminating the need for overall thickening of the upper cover 2, which helps reduce the production cost of the upper cover 2.

[0054] Optionally, an injection inlet is formed between two adjacent connecting protrusions 202. Specifically, the glue storage groove 100 formed between the outer peripheral surface of the upper cover 2, the inner peripheral surface of the lower shell 1, the annular protrusion 21, and the elastic annular retaining ring 3 has its opening vertically upward, thus facilitating workers to inject glue vertically downward.

[0055] Optionally, when the upper cover 2 is inserted into the lower shell 1, the gap width between the annular protrusion 21 and the inner circumferential surface of the lower shell 1 is no greater than 0.2 mm. Specifically, because the adhesive has a certain viscosity, the adhesive flows downward from the gap width between the annular protrusion 21 and the inner circumferential surface of the lower shell 1 to the elastic annular retaining ring 3. A smaller gap width between the annular protrusion 21 and the inner circumferential surface of the lower shell 1 can significantly improve the adhesive bonding speed and the adhesive bonding and fixing effect.

[0056] Optionally, the elastic annular retaining ring 3 is an annular sponge ring. The annular sponge ring has a first sealing surface and a second sealing surface, with the first sealing surface parallel to the second sealing surface. The first sealing surface is adhered to the outer circumferential surface of the upper cover 2, and the second sealing surface is used to abut against the inner circumferential surface of the lower shell 1. It should be further noted that the annular sponge ring is used to prevent adhesive from flowing downwards. The porous structure within the annular sponge ring has a small pore size, making it difficult for adhesive to flow through the pores, thus achieving the technical effect of blocking adhesive. Furthermore, after adhesive enters the pores of the annular sponge ring, the better air permeability of the porous structure allows the solvent in the adhesive to evaporate more quickly, thereby accelerating the adhesive's solidification process.

[0057] Optionally, the lower shell 1 is barrel-shaped and has a top opening for inserting the upper cover 2.

[0058] Optionally, the mounting groove 201 can be a stepped groove or an annular groove, as long as the mounting groove 201 can fix the elastic annular retaining ring 3. In this embodiment, the elastic annular retaining ring 3 is glued and fixed in the mounting groove 201.

[0059] Example 2

[0060] This embodiment discloses an energy storage device, including a housing sealing structure as described in Embodiment 1.

[0061] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A housing sealing structure, characterized in that, include: The lower shell (1) has an inner circumferential surface that is a curved surface extending in the vertical direction. The upper cover (2) is provided with an insertion part for vertically inserting into the lower shell (1). The outer periphery of the insertion part has an annular protrusion (21). The annular protrusion (21) is connected to an elastic annular retaining ring (3) for abutting against the inner wall circumferential surface of the lower shell (1). When the upper cover (2) is inserted into the lower shell (1), a glue storage tank (100) for storing sealant is formed between the outer peripheral surface of the upper cover (2), the inner peripheral surface of the lower shell (1), the annular protrusion (21), and the elastic annular retaining ring (3).

2. The housing sealing structure according to claim 1, characterized in that, The bottom end of the upper cover (2) forms a mounting groove (201), and the elastic annular retaining ring (3) is mounted on the mounting groove (201). The elastic annular retaining ring (3) is located on the bottom side of the annular protrusion (21) and protrudes from the annular protrusion (21). When the upper cover (2) is inserted into the lower shell (1), the annular protrusion (21) does not abut against the inner circumferential surface of the lower shell (1).

3. The housing sealing structure according to claim 1, characterized in that, The outer periphery of the upper cover (2) forms a connecting protrusion (202), and a plurality of connecting protrusions (202) are provided, and a transverse connecting thread hole is provided in the connecting protrusion (202); The lower shell (1) is provided with a through connection hole corresponding to the transverse connection thread hole. The threaded connector (4) is sequentially inserted into the connection hole and the transverse connection thread hole to connect the lower shell (1) and the upper cover (2).

4. The housing sealing structure according to claim 3, characterized in that, The upper cover (2) is also provided with an extension protrusion (203), and the extension protrusion (203) protrudes out of the inner wall of the upper cover (2); The extension protrusion (203) is provided in a plurality of ways, and the plurality of extension protrusions (203) correspond one-to-one with the plurality of connecting protrusions (202). The center lines of the corresponding extension protrusions (203) and connecting protrusions (202) coincide with each other. The transverse connecting threaded hole portion is located in the extended protrusion (203).

5. The housing sealing structure according to claim 3, characterized in that, An injection inlet is formed between two adjacent connecting protrusions (202).

6. The housing sealing structure according to claim 1, characterized in that, When the upper cover (2) is inserted into the lower shell (1), the gap width between the annular protrusion (21) and the inner wall circumference of the lower shell (1) is no greater than 0.2 mm.

7. The housing sealing structure according to claim 1, characterized in that, The elastic annular retaining ring (3) is an annular sponge ring; The annular sponge ring has a first sealing surface and a second sealing surface opposite to each other. The first sealing surface is parallel to the second sealing surface. The first sealing surface is attached to the outer peripheral surface of the upper cover (2), and the second sealing surface is used to abut against and fit the inner peripheral surface of the lower shell (1).

8. The housing sealing structure according to claim 1, characterized in that, The lower shell (1) is barrel-shaped and has a top opening for inserting the upper cover (2).

9. The housing sealing structure according to claim 2, characterized in that, The mounting groove (201) is a stepped groove or an annular groove.

10. An energy storage device, characterized in that, It includes a housing sealing structure as described in any one of claims 1 to 9.

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