Cover plate combination connecting structure

Abstract

The utility model discloses a cover plate combination connecting structure, which belongs to the technical field of battery equipment, and comprises a cover plate assembly, the cover plate assembly comprises a cover plate main body, a first plastic part and a second plastic part, the cover plate main body covers and is detachably connected to a battery shell, a through groove is formed in the cover plate main body, the through groove is communicated with the inside of the battery shell and the outside, and the first plastic part is connected with the second plastic part. The tab can penetrate through the through groove and is arranged outside the cover plate assembly in a folded mode, the bottom of the first plastic part protrudes downwards corresponding to the through groove to form a first positioning protrusion, and the first positioning protrusion is embedded in the upper half portion of the through groove and is in interference fit with the through groove; the top of the second plastic part protrudes upwards corresponding to the through groove to form a second positioning protrusion, and the second positioning protrusion is embedded in the lower half portion of the through groove and is in interference fit with the through groove.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, in particular to a cover plate combined 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. The cover plate assembly connection structure is a key component in various complex battery assemblies. The rationality and scientific nature of its design have a significant impact on the overall performance of the battery and the efficient use of internal space.

[0003] The existing cover plate combination connection structure is usually composed of a cover plate, a first plastic part, and a second plastic part. The connection method between the first and second plastic parts and the cover plate is mostly traditional connection methods, such as gluing or simple mechanical fixation. This connection method has many problems. On the one hand, the strength of the glue adhesion may be insufficient, which may easily cause debonding 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 relatively 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 cover plate assembly connection structure to solve the technical problems in the prior art of low strength and low installation efficiency in the connection method between the first plastic part and the second plastic part and the cover plate.

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

[0006] A cover plate combined connection structure, comprising:

[0007] The cover assembly includes a cover body, a first plastic part and a second plastic part. The cover body is covered and detachably connected to the battery shell. A through slot is provided on the cover body, and the through slot connects the interior of the battery shell with the outside. The tab can pass through the through slot and be folded and arranged on the outside of the cover assembly. The bottom of the first plastic part protrudes downward corresponding to the through slot to form a first positioning protrusion, and the first positioning protrusion is embedded in the upper half of the through slot and has an interference fit with the through slot; the top of the second plastic part protrudes upward corresponding to the through slot to form a second positioning protrusion, and the second positioning protrusion is embedded in the lower half of the through slot and has an interference fit with the through slot.

[0008] Preferably, interference ribs are provided on the side walls of the first positioning protrusion and / or the second positioning protrusion.

[0009] Preferably, a plurality of the interference ribs are provided, and the plurality of interference ribs are arranged at intervals along the circumference of the first positioning protrusion and the second positioning protrusion.

[0010] Preferably, the interference rib extends vertically along the thickness direction of the first positioning protrusion and the second positioning protrusion.

[0011] 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.

[0012] Preferably, the interference rib is extended in at least one of a bending extension, a horizontal extension or an inclined extension.

[0013] Preferably, the interference rib is provided on the inner wall of the through groove.

[0014] Preferably, four through grooves are provided on the cover plate body, the second plastic part is plate-shaped, and four second positioning protrusions are correspondingly provided on the second plastic part, and the four second positioning protrusions are arranged in a rectangular array.

[0015] Preferably, four through grooves are provided on the cover plate body, the first plastic part is plate-shaped, two first plastic parts are provided, and each first plastic part is provided with two first positioning protrusions at intervals.

[0016] Preferably, an explosion-proof valve is provided in the middle of the cover plate body, and two first plastic parts are symmetrically arranged on both sides of the explosion-proof valve.

[0017] Beneficial effects of the utility model:

[0018] The cover plate combination connection structure proposed in the present invention enhances the strength and stability of the connection between the first plastic part, the second plastic part and the cover plate body by the interference fit between the first positioning protrusion of the first plastic part and the upper half of the through groove, and the interference fit between the second positioning protrusion of the second plastic part and the lower half of the through groove, effectively avoiding the debonding phenomenon caused by insufficient glue adhesion strength in the prior art, thereby improving the reliability of the entire cover plate combination connection structure during use. Secondly, compared with the traditional complex and costly mechanical fixing method, the interference fit connection method not only simplifies the structure of the components and reduces costs, but also simplifies the installation process and improves installation efficiency. The tab passes through the through groove and folds over the outside of the cover plate assembly, thereby improving the space utilization inside the battery shell. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2This 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 a first plastic part provided by an embodiment of the present 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. Cover plate body; 121. Through groove; 13. First plastic part; 131. First positioning protrusion; 132. First connecting groove; 133. Accommodating groove; 14. Second plastic part; 141. Second positioning protrusion; 142. Second connecting groove; 15. Interference rib; 151. Guide slope; 16. Tab shaping structure; 17. Explosion-proof valve; 18. 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 cover plate assembly connection structure provided by the embodiment of the present invention includes a cover plate assembly 1. The cover plate assembly 1 includes a cover plate body 12, a first plastic part 13, and a second plastic part 14. The cover plate body 12 is provided to cover and detachably connect to the battery housing 11. A through slot 121 is formed on the cover plate body 12. The through slot 121 connects the interior of the battery housing 11 with the outside. The tab can pass through the through slot 121 and be folded and arranged on the outside of the cover plate assembly 1. The bottom of the first plastic part 13 projects downwardly corresponding to the through slot 121 to form a first positioning protrusion 131. The first positioning protrusion 131 is embedded in the upper half of the through slot 121 and has an interference fit with the through slot 121. The top of the second plastic part 14 projects upwardly corresponding to the through slot 121 to form a second positioning protrusion 141. The second positioning protrusion 141 is embedded in the lower half of the through slot 121 and has an interference fit with the through slot 121.

[0030] The cover plate combination connection structure proposed in the present invention enhances the strength and stability of the connection between the first plastic part 13, the second plastic part 14 and the cover plate body 12 by the interference fit between the first positioning protrusion 131 of the first plastic part 13 and the upper half of the through groove 121, and the interference fit between the second positioning protrusion 141 of the second plastic part 14 and the lower half of the through groove 121, effectively avoiding the debonding phenomenon caused by insufficient glue adhesion strength in the prior art, thereby improving the reliability of the entire cover plate combination connection structure during use. Secondly, compared with the traditional complex and costly mechanical fixing method, the interference fit connection method not only simplifies the structure of the components and reduces costs, but also simplifies the installation process and improves installation efficiency. The tab passes through the through groove 121 and folds over the outside of the cover plate assembly 1, thereby improving the space utilization inside the battery housing 11.

[0031] Specifically, interference ribs 15 are provided on the sidewalls of the first positioning protrusion 131 and / or the second positioning protrusion 141. The presence of interference ribs 15 increases friction and contact area, further reducing the possibility of loosening or disengagement, effectively resolving the unstable connection issues encountered in prior art. Furthermore, the enhanced connection provided by interference ribs 15 improves the durability and stability of the entire cover plate assembly without increasing structural complexity or cost.

[0032] Regarding the setting position of the interference rib 15, it can be set only on the side wall of the first positioning protrusion 131, or only on the side wall of the second positioning protrusion 141, or on the side walls of both the first positioning protrusion 131 and the second positioning protrusion 141. It can be selected according to actual conditions and is not limited here.

[0033] In addition to the interference ribs 15 provided on the first and second positioning protrusions 131 and 141, interference ribs 15 are also provided on the inner wall of the through-slot 121. On the one hand, the interference ribs 15 on the inner wall of the through-slot 121 and the interference ribs 15 on the positioning protrusions can form multiple fastening and interlocking forces, thereby strengthening the connection strength between the first and second plastic parts 13 and 14 and the cover body 12, making the entire connection structure more secure and reliable, and effectively preventing problems such as loosening and displacement during use. On the other hand, the interference ribs 15 can be omitted from the first and second positioning protrusions 131 and 141, and only provided on the inner wall of the through-slot 121, thereby also achieving an interference fit between the through-slot 121 and the first and second positioning protrusions 131 and 141.

[0034] It is worth noting that when interference ribs 15 are provided on the inner wall of the first positioning protrusion 131, the second positioning protrusion 141 and the through groove 121, it is necessary to stagger the interference ribs 15 at different positions to prevent two interference ribs 15 provided at the same position from interfering with each other, causing the first plastic part 13, the second plastic part 14 and the cover plate body 12 to be stuck and unable to cooperate normally.

[0035] Specifically, multiple interference ribs 15 are provided, spaced circumferentially around the first and second positioning projections 131, 141. This increases the contact points and friction of the interference ribs 15, making the interference fit more uniform and stable. This comprehensively enhances the strength of the connection, avoids localized loosening or damage caused by concentrated force at a single point, and improves the reliability and stability of the connection. This circumferentially spaced arrangement better handles external forces and vibrations from various directions, enabling the connection between the first and second plastic parts 13, 14, and the cover body 12 to withstand more complex operating environments and dynamic loads, effectively reducing the risk of connection failure due to external interference.

[0036] It can be understood that the specific number of interference ribs 15 is not limited here and is selected according to actual conditions. In this embodiment, interference ribs 15 are provided on at least two opposite side walls of the first positioning protrusion 131, and the number of interference ribs 15 on each side wall is not less than two, thereby improving the stability and tightness of the interference ribs 15. The number of interference ribs 15 set on the second positioning protrusion 141 is the same as that on the first positioning protrusion 131, and will not be repeated here.

[0037] Regarding the extension direction of the interference rib 15. In this embodiment, the interference rib 15 extends vertically along the thickness direction of the first positioning protrusion 131 and the second positioning protrusion 141. The vertical extension method can maximize the contact area and friction between the interference rib 15 and the inner wall of the through groove 121, enhancing the strength and stability of the interference fit; it can also more evenly share external forces from all directions, so that when the connection structure is subjected to complex mechanical effects, it will not be deformed or damaged due to excessive local force, further improving the durability and reliability of the connection. It can also reduce connection deviations or instability factors that may arise due to inconsistent directions of the interference rib 15, thereby ensuring the stable performance of the cover plate assembly connection structure during long-term use.

[0038] See also Figure 4 Specifically, a guiding bevel 151 is formed at one end of the interference rib 15 close to the through slot 121, and the guiding bevel 151 is inclined inwardly in the direction close to the through slot 121. The guiding bevel 151 facilitates the assembly process of the first positioning protrusion 131 and the second positioning protrusion 141 with the through slot 121. During installation, the guiding bevel 151 plays a guiding role, so that the positioning protrusion 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 151 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.

[0039] In other embodiments, the extension mode of the interference rib 15 is at least one of bending extension, horizontal extension or inclined extension. The choice of multiple extension modes increases the flexibility of the design. The most suitable extension mode can be selected according to the specific connection requirements and stress conditions, so as to better adapt to different working conditions and environments. Specifically, bending extension can provide support and resistance in different directions, and enhance the ability of the interference rib 15 to resist complex external forces; horizontal extension can increase the contact area with the through groove 121, further improving friction and connection strength; inclined extension can provide better guidance and tightening in a specific direction. The specific extension mode of the interference rib 15 is selected according to actual conditions and is not limited here.

[0040] See also Figure 2Regarding the specific structure of the second plastic part 14. Four through slots 121 are provided on the cover body 12. The second plastic part 14 is plate-shaped. Four second positioning protrusions 141 are correspondingly provided on the second plastic part 14. The four second positioning protrusions 141 are arranged in a rectangular array. The provision of four through slots 121 and four corresponding second positioning protrusions 141 increases the number of connection points, thereby making the connection between the first plastic part 13 and the second plastic part 14 and the cover body 12 more stable and uniform. The rectangular array arrangement of the second positioning protrusions 141 has good symmetry and balance, making the cover assembly connection structure more evenly stressed in all directions, reducing local deformation or damage caused by uneven stress, and further enhancing the stability and reliability of the structure.

[0041] Specifically, the second plastic part 14 is provided with a tab shaping structure 16 , which includes a plurality of inclined grooves. Both sides of the inclined grooves are inclined from the inside to the outside. The tabs fit the side walls of the inclined grooves and pass through the inclined grooves, thereby realizing the bending process.

[0042] More specifically, in order to facilitate the folding process of the tab from the through slot 121 , a second connecting slot 142 is formed through the middle of the second positioning protrusion 141 . The second connecting slot 142 connects the through slot 121 with the interior of the battery housing 11 , thereby facilitating the passage of the tab.

[0043] See also Figure 3 , about the specific structure of the first plastic part 13. Four through grooves 121 are provided on the cover body 12, and the first plastic part 13 is plate-shaped. There are two first plastic parts 13, and each first plastic part 13 is provided with two first positioning protrusions 131 at intervals. The design of two plate-shaped first plastic parts 13 simplifies the structure and is convenient for manufacturing and installation. It reduces the number of complex parts, reduces the difficulty and cost of the production process, and also improves production efficiency. Two first positioning protrusions 131 are provided at intervals on each first plastic part 13, so that the cooperation between the first plastic part 13 and the through groove 121 is more uniform and balanced. During use, deformation or damage caused by excessive local force can be avoided, thereby ensuring the overall consistency and durability of the cover assembly connection structure.

[0044] Specifically, in order to facilitate the folding process of the tab from the through slot 121 , a first connecting slot 132 is formed through the middle of the first positioning protrusion 131 . The first connecting slot 132 connects the through slot 121 with the external environment, thereby facilitating the tab to pass through.

[0045] Specifically, a receiving groove 133 is defined in the middle of the first plastic part 13 for accommodating a connecting piece or a pole, and two first positioning protrusions 131 are distributed on both sides of the receiving groove 133 .

[0046] Specifically, an explosion-proof valve 17 is provided in the middle of the cover body 12 to enhance the safety of the battery during use. When abnormal pressure occurs inside the battery, the explosion-proof valve 17 can be activated in time to release the pressure and prevent dangerous situations such as battery explosion. The two first plastic parts 13 are symmetrically arranged on both sides of the explosion-proof valve 17, 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 assembly connection structure. Furthermore, the symmetrical arrangement 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.

[0047] It is understandable that the explosion-proof valve 17 is an existing mechanical device in the art, and its working principle and specific structure are not described in detail here.

[0048] In addition, it is worth noting that the notch on the explosion-proof valve 17 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.

[0049] The first plastic part 13 can be configured as an integral molding or a combination molding, and the second plastic part 14 can also be configured as an integral molding or a combination molding, which will not be described in detail here.

[0050] Regarding the setting of the through groove 121 on the cover body 12, the battery shell 11 can be provided with one or both of the positive and negative electrodes. The positive and negative electrodes can be provided on the same side or separately. There is no limitation here. At least one through groove 121 must be provided for each positive electrode or negative electrode to ensure the effectiveness and stability of the electrode connection and to ensure that the electrode ear connected to each electrode can pass through the through groove 121 and be folded over.

[0051] In addition, the cover body 12 is also provided with an injection port 18, which connects the interior of the battery housing 11 with the external environment. The presence of the injection port 18 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 18 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 18, 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.

[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 cover plate combined connection structure, characterized in that: include: A cover plate assembly (1) comprises a cover plate body (12), a first plastic part (13) and a second plastic part (14); the cover plate body (12) is covered and detachably connected to a battery housing (11); a through slot (121) is provided on the cover plate body (12); the through slot (121) connects the inside of the battery housing (11) with the outside; a tab can pass through the through slot (121) and be folded and arranged on the outside of the cover plate assembly (1); the bottom of the first plastic part (13) is opposite to the battery housing (11); The through slot (121) protrudes downward to form a first positioning protrusion (131), which is embedded in the upper half of the through slot (121) and has an interference fit with the through slot (121); the top of the second plastic part (14) protrudes upward to form a second positioning protrusion (141) corresponding to the through slot (121), which is embedded in the lower half of the through slot (121) and has an interference fit with the through slot (121).

2. The cover plate assembly connection structure according to claim 1, characterized in that: The first positioning protrusion (131) and / or the second positioning protrusion (141) are provided with interference ribs (15) on their side walls.

3. The cover plate assembly connection structure according to claim 2, characterized in that: A plurality of the interference ribs (15) are provided, and the plurality of interference ribs (15) are arranged at intervals along the circumference of the first positioning protrusion (131) and the second positioning protrusion (141).

4. The cover plate assembly connection structure according to claim 2, characterized in that: The interference rib (15) extends vertically along the thickness direction of the first positioning protrusion (131) and the second positioning protrusion (141).

5. The cover plate assembly connection structure according to claim 4, characterized in that: An end of the interference rib (15) close to the through slot (121) forms a guiding inclined surface (151), and the guiding inclined surface (151) is inclined inwardly in a direction close to the through slot (121).

6. The cover plate assembly connection structure according to claim 2, characterized in that: The interference rib (15) is extended in at least one of a bending extension, a horizontal extension or an inclined extension.

7. The cover plate assembly connection structure according to claim 2, characterized in that: The interference rib (15) is provided on the inner wall of the through groove (121).

8. The cover plate assembly connection structure according to any one of claims 1 to 7, characterized in that: The cover plate body (12) is provided with four through slots (121), the second plastic part (14) is plate-shaped, and the second plastic part (14) is correspondingly provided with four second positioning protrusions (141), and the four second positioning protrusions (141) are arranged in a rectangular array.

9. The cover plate assembly connection structure according to any one of claims 1 to 7, characterized in that: The cover plate body (12) is provided with four through slots (121), the first plastic part (13) is plate-shaped, two first plastic parts (13) are provided, and each first plastic part (13) is provided with two first positioning protrusions (131) at intervals.

10. The cover plate assembly connection structure according to claim 9, characterized in that: An explosion-proof valve (17) is provided in the middle of the cover plate body (12), and the two first plastic parts (13) are symmetrically arranged on both sides of the explosion-proof valve (17).

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