Battery shell cover plate connecting structure

Abstract

The utility model discloses a battery shell cover plate connecting structure, which belongs to the technical field of battery equipment and comprises a cover plate component, the cover plate component comprises a first plastic part and a second plastic part, the first plastic part covers and is detachably connected to a battery shell, a through groove is formed in the first plastic part, and the second plastic part is detachably connected to the battery shell. The second plastic part is located on the lower side of the first plastic part and protrudes upwards corresponding to the through groove to form a positioning protrusion, a connecting groove is formed in the positioning protrusion in a penetrating mode, the connecting groove is communicated with the through groove, and interference ribs are arranged on the outer wall of the positioning protrusion and / or the inner wall of the through groove. The positioning protrusion is embedded in the through groove and is in interference fit with the through groove through the interference rib, and a tab shaping structure is arranged on the second plastic part. The positioning protrusions are embedded in the through grooves, and the interference ribs are adopted to achieve interference fit, so that the stability and the fastening performance of connection between the second plastic part and the first plastic part are improved, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, in particular to a battery shell cover plate connection structure. Background Art

[0002] With the advancement of modern science and technology, battery technology plays an indispensable role in numerous fields, including electric vehicles, consumer electronics, and energy storage systems. Improving battery performance and optimizing space utilization have become current research focuses and hot topics. As a key component of complex battery assemblies, the cover plate connection structure, with its rationality and scientific design, significantly impacts the overall performance of the battery and the efficient use of internal space.

[0003] The existing cover plate connection structure is usually composed of a cover plate and a plastic component. The plastic component is generally arranged on the upper and lower sides of the cover plate to insulate and seal the cover plate. However, the connection method between the plastic component and the cover plate is mostly traditional connection methods, such as gluing or simple mechanical fixation. There are many problems with this connection method. On the one hand, the strength of the glue adhesion may be insufficient, and it is easy to debond during use, affecting the stability of the connection; on the other hand, the mechanical fixation method may increase the complexity and cost of the components, and the installation process is more cumbersome. In addition, the tabs, connecting plates and poles are all arranged inside the battery shell, which is not conducive to improving the space utilization inside the battery. Utility Model Content

[0004] The purpose of the utility model is to provide a battery housing cover plate connection structure to solve the technical problems of poor connection stability and low installation efficiency between the plastic component and the cover plate in the prior art.

[0005] As conceived above, the technical solution adopted by the utility model is:

[0006] A battery housing cover plate connection structure, comprising:

[0007] The cover plate assembly includes a first plastic part and a second plastic part. The first plastic part is covered and detachably connected to the battery shell. A through slot is opened on the first plastic part. The pole ear can pass through the through slot and be folded and arranged on the outside of the cover plate assembly. The part of the second plastic part located on the lower side of the first plastic part protrudes upward corresponding to the through slot to form a positioning protrusion. A connecting groove is provided through the positioning protrusion, and the connecting groove is connected to the through slot. Interference ribs are provided on the outer wall of the positioning protrusion and / or the inner wall of the through slot. The positioning protrusion is embedded in the through slot and is interference-fitted with the through slot through the interference ribs. A pole ear shaping structure is provided on part of the second plastic part.

[0008] Preferably, the through slot is in a rectangular shape, the positioning protrusion is configured as a rectangle that matches the through slot, and the interference ribs are provided on at least two side walls of the positioning protrusion.

[0009] Preferably, the interference ribs are provided on the two side walls opposite to the positioning protrusion.

[0010] Preferably, the number of the interference ribs on each of the side walls is greater than or equal to two and less than or equal to four.

[0011] Preferably, the four corners of the positioning protrusion are rounded.

[0012] Preferably, the interference rib extends vertically along the thickness direction of the positioning protrusion.

[0013] Preferably, the interference rib forms a guiding slope at one end close to the through slot, and the guiding slope is inclined inwardly in a direction close to the through slot.

[0014] Preferably, at least one of a positive electrode and a negative electrode is provided on the first plastic part, and corresponding to each of the positive electrode or the negative electrode, at least one through groove is provided on the first plastic part.

[0015] Preferably, the first plastic part is provided with four through grooves, the second plastic part is configured to be plate-shaped, and the second plastic part is correspondingly provided with four positioning protrusions, which are arranged in a rectangular row.

[0016] Preferably, the thickness of the interference rib is greater than or equal to 0.05 mm and less than or equal to 0.3 mm.

[0017] Beneficial effects of the utility model:

[0018] The battery shell cover connection structure proposed in the present invention improves the stability of the connection between the second plastic part and the first plastic part by embedding the positioning protrusion in the through groove and using interference ribs to achieve interference fit. The interference fit connection method does not require glue or the like for bonding, which avoids the risk of debonding. There is no complex structure and high cost of mechanical fixation, and the installation is simpler and more efficient. The connecting groove is connected to the through groove so that the tab can pass through the through groove and be folded and arranged on the outside of the cover assembly, making the layout of the tab more reasonable and improving space utilization. The setting of the tab shaping structure can make the tab better in shape after folding, protect the tab, and prevent the tab from short-circuiting with the battery shell due to poor folding shape of the tab, further improving the performance and safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the exploded structure of the battery housing cover plate connection structure provided by an embodiment of the present utility model;

[0020] Figure 2 This is a schematic structural diagram of a second plastic part provided by an embodiment of the present utility model;

[0021] Figure 3 This is a schematic structural diagram of the positioning protrusion provided by an embodiment of the utility model;

[0022] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0023] In the picture:

[0024] 1. Cover plate assembly; 11. Battery housing; 12. First plastic part; 121. Through groove; 13. Third plastic part; 14. Second plastic part; 15. Positioning protrusion; 151. Connecting groove; 16. Interference rib; 161. Guide slope; 17. Tab shaping structure; 18. Explosion-proof valve; 19. Liquid filling port. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] See also Figures 1 to 4 The battery housing cover plate connection structure provided by the embodiment of the present invention includes a cover plate assembly 1. The cover plate assembly 1 includes a first plastic part 12 and a second plastic part 14. The first plastic part 12 is covered and detachably connected to the battery housing 11. The first plastic part 12 is provided with a through slot 121. The tab can pass through the through slot 121 and be folded and arranged on the outside of the cover plate assembly 1. The second plastic part 14 is located on the lower side of the first plastic part 12 and protrudes upward corresponding to the through slot 121 to form a positioning protrusion 15. The positioning protrusion 15 is provided with a connecting groove 151 extending therethrough. The connecting groove 151 is connected to the through slot 121. The outer wall of the positioning protrusion 15 and / or the inner wall of the through slot 121 are provided with interference ribs 16. The positioning protrusion 15 is embedded in the through slot 121 and is interference-fitted with the through slot 121 through the interference ribs 16. The second plastic part 14 is provided with a tab shaping structure 17.

[0030] The battery shell cover connection structure proposed in the present invention improves the stability of the connection between the second plastic part 14 and the first plastic part 12 by embedding the positioning protrusion 15 in the through groove 121 and using the interference rib 16 to achieve interference fit. The interference fit connection method does not require glue or the like for bonding, which avoids the risk of debonding, and does not require a complex structure and high cost for mechanical fixation, making installation simpler and more efficient. The connecting groove 151 is connected to the through groove 121 so that the tab can pass through the through groove 121 and be folded and arranged on the outside of the cover assembly 1, making the layout of the tab more reasonable and improving space utilization. The provision of the tab shaping structure 17 can make the tab have a better shape after folding, protect the tab, and prevent the tab from short-circuiting with the battery shell 11 due to poor folding shape of the tab, further improving the performance and safety of the battery.

[0031] Among them, the tab shaping structure 17 is set on the second plastic part 14, and the tab shaping structure 17 includes multiple oblique grooves. The two sides of the oblique grooves are inclined from the inside to the outside. The tabs fit the side walls of the oblique grooves and pass through the oblique grooves, thereby realizing the bending process.

[0032] In this embodiment, the second plastic part 14 can be provided as an integrally molded part or a combined molded part, which is not limited here.

[0033] Regarding the location of the interference ribs 16, they can be provided only on the side walls of the positioning protrusions 15 or on the inner walls of the through-slots 121. On one hand, interference ribs 16 can be provided on both the inner walls of the through-slots 121 and the outer walls of the positioning protrusions 15 to achieve multiple fastening and engagement, thereby strengthening the connection between the second plastic part 14 and the first plastic part 12. On the other hand, interference ribs 16 can be provided only on the inner walls of the through-slots 121, rather than on the positioning protrusions 15, thereby also achieving an interference fit between the through-slots 121 and the positioning protrusions 15.

[0034] It is worth noting that when interference ribs 16 are provided on the inner walls of the positioning protrusion 15 and the through groove 121, the interference ribs 16 at different positions need to be staggered to prevent two interference ribs 16 relatively provided at the same position from interfering with each other, causing the positioning protrusion 15 and the first plastic part 12 to be stuck and unable to cooperate normally.

[0035] In this embodiment, the through-slot 121 is rectangular in shape, and the positioning protrusion 15 is configured to conform to the rectangular shape of the through-slot 121. Interference ribs 16 are provided on at least two sidewalls of the positioning protrusion 15. The rectangular through-slot 121 and positioning protrusion 15 are neatly shaped, facilitating manufacturing, improving production efficiency and reducing costs. The inclusion of interference ribs 16 on at least two sidewalls further enhances the stability and reliability of the interference fit, further strengthening the connection between the second plastic component 14 and the first plastic component 12.

[0036] Specifically, when the interference rib 16 is set on the positioning protrusion 15, there are the following situations: the interference rib 16 can be set on two adjacent side walls of the positioning protrusion 15, the interference rib 16 can be set on two opposite side walls of the positioning protrusion 15, the interference rib 16 can be set on three side walls of the positioning protrusion 15, or the interference rib 16 can be set on all four side walls of the positioning protrusion 15.

[0037] In this embodiment, interference ribs 16 are provided on two opposing sidewalls of the positioning protrusion 15. Providing interference ribs 16 on these opposing sidewalls provides a uniform and stable interference force from two directions, making the interference fit between the positioning protrusion 15 and the through-slot 121 more balanced and stable. Furthermore, there is no need to provide interference ribs 16 on all sidewalls, thus saving costs. In other embodiments, interference ribs 16 can be provided at other locations on the positioning protrusion 15 mentioned above, which will not be discussed here.

[0038] Regarding the number of interference ribs 16, in this embodiment, the number of interference ribs 16 on each side wall is greater than or equal to two and less than or equal to four. The number of interference ribs 16 on each side wall is greater than or equal to two, thereby increasing the contact points of the interference fit, thereby dispersing the force, making the interference fit more uniform and stable, and further improving the firmness of the connection between the second plastic part 14 and the first plastic part 12. Limiting the number of interference ribs 16 on each side wall to less than or equal to four avoids the problem of excessive interference ribs 16 leading to increased processing difficulty, increased costs, and reduced installation efficiency. In other embodiments, the number of interference ribs 16 can be set to one, five, etc. as needed, and will not be elaborated here.

[0039] Regarding the extension direction of interference rib 16, it extends vertically along the thickness of positioning protrusion 15. The vertically extending interference rib 16 provides a stable and continuous interference force in the vertical direction, ensuring a tighter and more secure interference fit between positioning protrusion 15 and through-slot 121. Furthermore, the vertically extending interference rib 16 facilitates accurate fit during installation, reducing installation difficulty and errors, and improving installation efficiency.

[0040] See also Figure 4 Furthermore, a guiding bevel 161 is formed at one end of the interference rib 16 close to the through slot 121, and the guiding bevel 161 is inclined inwardly in the direction close to the through slot 121. The guiding bevel 161 facilitates the assembly process of the positioning protrusion 15 and the through slot 121. During installation, the guiding bevel 161 plays a guiding role, so that the positioning protrusion 15 can be inserted into the through slot 121 more smoothly, reducing resistance and jamming during the installation process, thereby improving installation efficiency. Secondly, the guiding bevel 161 can alleviate the assembly pressure caused by the interference fit to a certain extent, reduce the risk of damage to components due to excessive extrusion during the assembly process, and help protect the integrity and reliability of the connection structure.

[0041] In other embodiments, the interference rib 16 may be extended in at least one of a curved, horizontal, or inclined manner. The selection of multiple extension methods increases design flexibility. The most appropriate extension method can be selected based on specific connection requirements and stress conditions, thereby better adapting to different working conditions and environments.

[0042] Specifically, the thickness of the interference rib 16 is greater than or equal to 0.05 mm and less than or equal to 0.3 mm. On the one hand, a thickness of greater than or equal to 0.05 mm ensures that the interference rib 16 has sufficient strength and elasticity, providing an effective interference force when mating with the through-slot 121, thereby ensuring the stability of the connection between the second plastic part 14 and the first plastic part 12 and avoiding a loose connection. On the other hand, limiting the thickness of the interference rib 16 to less than or equal to 0.3 mm can avoid problems such as installation difficulties, increased structural complexity, and increased costs caused by excessively thick interference ribs 16.

[0043] Furthermore, the rounded corners of the positioning protrusion 15 effectively reduce stress concentration, making the force applied more evenly at the four corners when the positioning protrusion 15 forms an interference fit with the through-slot 121, thereby improving the overall stability and durability of the connection structure. Furthermore, the rounded corner design makes installation smoother and less prone to jamming or scratching, helping to improve installation efficiency and ease of operation.

[0044] Regarding the arrangement of the through-slots 121 on the first plastic part 12, at least one of the positive and negative electrodes is provided on the first plastic part 12, and corresponding to each positive electrode or negative electrode, at least one through-slot 121 is provided on the first plastic part 12. Specifically, the first plastic part 12 can be provided with either or both the positive and negative electrodes. The positive and negative electrodes can be provided on the same side or separately, and there is no limitation here. At least one through-slot 121 is provided for each positive electrode or negative electrode to ensure the effectiveness and stability of the electrode connection and to ensure that the tab connected to each electrode can pass through the through-slot 121 and be folded.

[0045] In this embodiment, the first plastic part 12 is provided with four through-slots 121. The second plastic part 14 is configured in a plate shape, and correspondingly, four positioning protrusions 15 are provided on the second plastic part 14. The four positioning protrusions 15 are arranged in a rectangular array. The provision of the four through-slots 121 provides more options and flexibility for internal circuit layout and component installation within the battery, better adapting to different battery design requirements. The plate-shaped second plastic part 14 and the four positioning protrusions 15 arranged in a rectangular array ensure a more stable and uniform connection between the second plastic part 14 and the first plastic part 12.

[0046] In other embodiments, to further enhance the protection and sealing properties of the first plastic part 12, a third plastic part 13 is further provided on the first plastic part 12, and the third plastic part 13 is connected to the top of the first plastic part 12. The connection between the third plastic part 13 and the first plastic part 12 may be by gluing, bolting, or the interference fit of this embodiment, which is not limited herein.

[0047] Specifically, the third plastic part 13 and the second plastic part 14 are both made of plastic or rubber, which can effectively isolate current and prevent electrical faults such as short circuits.

[0048] To improve battery safety, an explosion-proof valve 18 is provided in the middle of the first plastic part 12. This valve enhances battery safety during use. When abnormal pressure builds up inside the battery, the valve 18 activates to release the pressure, preventing the battery from exploding or other dangerous situations.

[0049] It is understandable that the explosion-proof valve 18 is an existing mechanical device in the art, and its working principle and specific structure are not described in detail here.

[0050] In addition, it is worth noting that the notch on the explosion-proof valve 18 can be oriented toward the inside of the battery housing 11 or toward the outside of the battery housing 11 , or can be omitted, which is not limited here.

[0051] Furthermore, the first plastic part 12 is also provided with an injection port 19, which connects the interior of the battery housing 11 with the external environment. The presence of the injection port 19 facilitates the replenishment of electrolyte during battery maintenance or repair, thereby extending the battery's service life and reducing the cost of battery use. Electrolyte can be injected into the battery housing 11 through the injection port 19 without disassembling the first plastic part 12 or performing complex operations, thereby improving production efficiency and reducing the number of operating steps and time costs. The location of the injection port 19 can be located near the positive electrode side, near the negative electrode side, or between the positive and negative electrodes, and is not limited here.

[0052] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery housing cover connection structure, characterized in that: include: A cover plate assembly (1) comprises a first plastic part (12) and a second plastic part (14), wherein the first plastic part (12) is covered and detachably connected to a battery housing (11), a through slot (121) is provided on the first plastic part (12), and a tab can pass through the through slot (121) and be folded and arranged on the outside of the cover plate assembly (1), and the second plastic part (14) is located on the lower side of the first plastic part (12) and protrudes upward corresponding to the through slot (121) to form a positioning protrusion (15) The positioning protrusion (15) is provided with a connecting groove (151) extending therethrough, the connecting groove (151) is connected to the through groove (121), an interference rib (16) is provided on the outer wall of the positioning protrusion (15) and / or the inner wall of the through groove (121), the positioning protrusion (15) is embedded in the through groove (121) and is interference-fitted with the through groove (121) through the interference rib (16), and the second plastic part (14) is provided with a tab shaping structure (17).

2. The battery housing cover plate connection structure according to claim 1, characterized in that: The through slot (121) is in the shape of a rectangle, the positioning protrusion (15) is configured as a rectangle adapted to the through slot (121), and the interference ribs (16) are provided on at least two side walls of the positioning protrusion (15).

3. The battery housing cover plate connection structure according to claim 2, characterized in that: The interference ribs (16) are provided on the two side walls opposite to the positioning protrusion (15).

4. The battery housing cover plate connection structure according to claim 3, characterized in that: The number of the interference ribs (16) on each side wall is greater than or equal to two and less than or equal to four.

5. The battery housing cover plate connection structure according to claim 2, characterized in that: The four corners of the positioning protrusion (15) are rounded.

6. The battery housing cover plate connection structure according to claim 1, characterized in that: The interference rib (16) extends vertically along the thickness direction of the positioning protrusion (15).

7. The battery housing cover plate connection structure according to claim 6, characterized in that: An end of the interference rib (16) close to the through slot (121) forms a guiding inclined surface (161), and the guiding inclined surface (161) is inclined inwardly in a direction close to the through slot (121).

8. The battery housing cover plate connection structure according to any one of claims 1 to 7, characterized in that: At least one of a positive electrode and a negative electrode is provided on the first plastic part (12), and corresponding to each positive electrode or each negative electrode, at least one through groove (121) is provided on the first plastic part (12).

9. The battery housing cover plate connection structure according to any one of claims 1 to 7, characterized in that: The first plastic part (12) is provided with four through slots (121), the second plastic part (14) is configured as a plate, and the second plastic part (14) is correspondingly provided with four positioning protrusions (15), and the four positioning protrusions (15) are arranged in a rectangular row.

10. The battery housing cover plate connection structure according to any one of claims 1 to 7, characterized in that: The thickness of the interference rib (16) is greater than or equal to 0.05 mm and less than or equal to 0.3 mm.

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