Battery cover plate connecting structure

Abstract

The utility model discloses a battery cover plate connecting structure, which belongs to the technical field of battery equipment and comprises a cover plate component which comprises a cover plate main body and an upper cover body. The cover plate main body covers the battery shell and is detachably connected to the battery shell, a through groove is formed in the cover plate main body, the tab can penetrate through the through groove and is arranged outside the cover plate assembly in a folding manner, the upper cover body is positioned on the upper side of the cover plate main body and protrudes downwards along with the through groove to form a positioning bulge, and the positioning bulge is clamped in the through groove. Through the mode that the positioning protrusions are clamped in the through grooves, the connection stability and the installation efficiency of the upper cover body and the cover plate body are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, in particular to a battery 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 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 present utility model is:

[0006] A battery cover connection structure, comprising:

[0007] The cover assembly includes a cover body and a plastic assembly. The cover body is covered and detachably connected to the battery housing. A through slot is provided on the cover body. The tab can pass through the through slot and be folded and arranged on the outside of the cover assembly. The upper cover is located on the upper side of the cover body and protrudes downward corresponding to the through slot to form a positioning protrusion, and the positioning protrusion is snapped into the through slot.

[0008] Preferably, a connecting groove is provided on the positioning protrusion, the connecting groove is connected to the through groove, and interference ribs are provided 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 interference-fitted with the through groove through the interference ribs.

[0009] Preferably, the through slot is in a rectangular shape, the positioning protrusion is configured as a rectangle adapted to the through slot, and the interference ribs are provided on at least two side walls of the positioning protrusion.

[0010] Preferably, the interference ribs are provided on the two side walls opposite to the positioning protrusion.

[0011] 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.

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

[0015] Preferably, the distance between the top surface of the upper cover body and the top surface of the cover plate body is greater than or equal to half the thickness of the cover plate body and less than or equal to the thickness of the cover plate body.

[0016] Preferably, four through slots are provided on the cover plate body, the upper cover body is configured to be plate-shaped, two upper cover bodies are provided, and each upper cover body is correspondingly provided with two positioning protrusions.

[0017] Beneficial effects of the utility model:

[0018] The battery cover connection structure proposed in this utility model improves the stability of the connection between the upper cover and the cover body by means of a snap-fitting arrangement in which a positioning protrusion snaps into a through slot. This snap-fit ​​connection method eliminates the need for adhesive bonding, avoiding the risk of debonding. It also eliminates the complex structure and high cost of mechanical fixings, making installation simpler and more efficient. The through slot allows the tabs to be folded and positioned outside the cover assembly, making the tab layout more rational and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0023] In the picture:

[0024] 1. Cover plate assembly; 11. Battery housing; 12. Cover plate body; 121. Through groove; 13. Upper cover body; 131. Accommodation groove; 14. Lower cover body; 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 4The battery cover connection structure provided by the embodiment of the present invention includes a cover assembly 1. The cover assembly 1 includes a cover body 12 and an upper cover 13. The cover body 12 is arranged to cover and detachably connect to the battery housing 11. The cover body 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 assembly 1. The upper cover 13 is located on the upper side of the cover body 12 and protrudes downwardly corresponding to the through slot 121 to form a positioning protrusion 15. The positioning protrusion 15 is snap-fitted into the through slot 121.

[0030] The battery cover connection structure proposed in this utility model improves the stability of the connection between the upper cover body 13 and the cover body 12 by means of the engagement of the positioning protrusion 15 with the through-slot 121. This snap-fit ​​connection method eliminates the need for adhesive bonding, such as glue, and avoids the risk of debonding. It also eliminates the complex structure and high cost of mechanical fixings, making installation simpler and more efficient. The through-slot 121 allows the tabs to be folded and positioned outside the cover assembly 1, making the tab layout more rational and improving space utilization.

[0031] In this embodiment, the upper cover 13 can be configured to be integrally formed or assembled.

[0032] In order to further improve the stability of the fit between the positioning protrusion 15 and the through-slot 121, a connecting groove 151 is provided through the positioning protrusion 15, and the connecting groove 151 is connected to the through-slot 121. An interference rib 16 is provided on the outer wall of the positioning protrusion 15 and / or the inner wall of the through-slot 121. The positioning protrusion 15 is embedded in the through-slot 121 and is interference-fitted with the through-slot 121 through the interference rib 16. The interference fit can effectively prevent the connection part from loosening or displacement during use, ensuring that each component always remains in the correct position, thereby improving the reliability of the overall structure. The provision of the interference rib 16 can play a guiding and positioning role during the assembly process, helping to improve the accuracy of the assembly. The connecting groove 151 is connected to the through-slot 121, so that the tab can pass through the through-slot 121 through the connecting groove 151 and be folded and arranged on the outside of the cover assembly 1.

[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 the 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 upper cover 13 and the cover plate body 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 cover plate body 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 fit 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 uniformly shaped, facilitating manufacturing, improving 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 upper cover 13 and the cover plate body 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. Having two or more interference ribs 16 on each side wall increases the contact points of the interference fit, distributing the force, making the interference fit more uniform and stable, and further enhancing the secure connection between the upper cover body 13 and the cover plate body 12. Limiting the number of interference ribs 16 on each side wall to less than or equal to four avoids the problems of increased processing difficulty, increased costs, and reduced installation efficiency caused by excessive interference ribs 16.

[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 0.05mm and less than or equal to 0.3mm. On the one hand, a thickness of greater than or equal to 0.05mm 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 upper cover body 13 and the cover plate body 12 and avoiding a loose connection. On the other hand, limiting the thickness of the interference rib 16 to less than or equal to 0.3mm can avoid problems such as installation difficulties, increased structural complexity, and increased costs caused by excessively thick interference ribs 16.

[0043] In other embodiments, in order to further improve the protection and sealing of the cover body 12, a lower cover body 14 is also provided on the cover body 12. The connection method between the lower cover body 14 and the bottom of the cover body 12 can be bolt connection, adhesive connection, magnetic connection, etc., or it can be an interference fit in this embodiment, which is not limited here.

[0044] Specifically, the upper cover 13 and the lower cover 14 are both made of plastic or rubber, which can effectively isolate current and prevent electrical faults such as short circuits.

[0045] Furthermore, a tab shaping structure 17 is provided on the lower cover 14 , and the tab shaping structure 17 includes a plurality of inclined grooves, both sides of which are inclined from the inside to the outside, and the tabs fit the side walls of the inclined grooves and pass through the inclined grooves, thereby realizing the bending process.

[0046] See also Figure 1 and Figure 3 Specifically, four through slots 121 are provided on the cover body 12, and the upper cover body 13 is configured to be plate-shaped. There are two upper cover bodies 13, and each upper cover body 13 is correspondingly provided with two positioning protrusions 15. The provision of four through slots 121 increases the layout flexibility of the tabs, and can better adapt to different battery internal structures and circuit design requirements. The plate-shaped design of the upper cover body 13 and the two positioning protrusions 15 correspondingly provided on each upper cover body 13 make the structure more regular and compact while ensuring the stability of the connection. The distribution of the two upper cover bodies 13 and the two positioning protrusions 15 on each upper cover body 13 makes the force more uniform.

[0047] More specifically, a receiving groove 131 is defined in the middle of the upper cover 13, with two positioning protrusions 15 symmetrically located on either side of the groove 131. The groove 131 accommodates devices such as terminals and connectors, providing a reasonable layout for other components or circuits within the battery, thereby optimizing space utilization within the cover assembly 1. The symmetrical placement of the two positioning protrusions 15 on either side of the groove 131 ensures a more even and balanced force when the upper cover 13 is connected to the cover body 12, enhancing the stability and reliability of the connection and reducing the risk of deformation or loosening due to uneven force.

[0048] Furthermore, the distance between the top surface of the upper cover body 13 and the top surface of the cover body 12 is greater than or equal to half of the thickness of the cover body 12 and less than or equal to the thickness of the cover body 12. On the one hand, it prevents the thickness of the upper cover body 13 from being too small, resulting in low strength of the cover assembly 1; on the other hand, it prevents the thickness of the upper cover body 13 from being too large, resulting in low space utilization of the upper cover body 13.

[0049] In addition, an explosion-proof valve 18 is provided in the middle of the cover body 12, which can enhance the safety of the battery during use. When abnormal pressure appears inside the battery, the explosion-proof valve 18 can be activated in time to release the pressure and prevent dangerous situations such as battery explosion. The two upper covers 13 are symmetrically arranged on both sides of the explosion-proof valve 18, so that the force on the cover body 12 is more uniform. During the operation of the battery, the deformation or damage of the cover body 12 caused by uneven force can be effectively reduced, thereby improving the overall stability and reliability of the cover plastic connection structure. Furthermore, the symmetrical setting helps to optimize the spatial distribution inside the battery, making the structure more compact and reasonable. Without increasing the additional space occupied, a more efficient layout is achieved, which provides convenience for the installation and operation of other components.

[0050] 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.

[0051] 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.

[0052] Regarding the arrangement of the through-slots 121 on the cover body 12, the battery housing 11 may be provided with either or both the positive and negative electrodes. The positive and negative electrodes may be provided on the same side or separately, without limitation. It is worth noting that at least one through-slot 121 is provided for each positive or negative electrode to ensure the effectiveness and stability of the electrode connection and to ensure that the tabs connected to each electrode can pass through the through-slot 121 for folding.

[0053] In addition, the cover body 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 removing the cover body 12 or performing complex operations, thereby improving production efficiency and reducing the number of operating steps and time costs. Regarding the location of the injection port 19, it can be set near the positive electrode side, near the negative electrode side, or between the positive and negative electrodes, and is not limited here.

[0054] 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 cover connection structure, characterized in that: include: A cover assembly (1) comprises a cover body (12) and an upper cover body (13); the cover body (12) is arranged to cover and be detachably connected to a battery housing (11); a through slot (121) is provided on the cover body (12); a tab can pass through the through slot (121) and be folded and arranged outside the cover assembly (1); the upper cover body (13) is located on the upper side of the cover body (12) and protrudes downward corresponding to the through slot (121) to form a positioning protrusion (15); and the positioning protrusion (15) is engaged with the through slot (121).

2. The battery cover connection structure according to claim 1, characterized in that: A connecting groove (151) is provided on the positioning protrusion (15), and 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).

3. The battery cover connection structure according to claim 2, 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).

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

5. The battery cover connection structure according to claim 4, 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.

6. The battery cover connection structure according to claim 2, characterized in that: The interference rib (16) extends vertically along the thickness direction of the positioning protrusion (15).

7. The battery cover 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 cover connection structure according to claim 2, 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.

9. The battery cover connection structure according to any one of claims 1 to 8, characterized in that: The distance between the top surface of the upper cover body (13) and the top surface of the cover body (12) is greater than or equal to half the thickness of the cover body (12) and less than or equal to the thickness of the cover body (12).

10. The battery cover connection structure according to any one of claims 1 to 8, characterized in that: The cover plate body (12) is provided with four through slots (121), the upper cover body (13) is configured to be plate-shaped, two upper cover bodies (13) are provided, and each upper cover body (13) is correspondingly provided with two positioning protrusions (15).

Images