Cover plate connecting structure

Abstract

The utility model discloses a 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 cover plate main body and a plastic part, the cover plate main body covers a battery shell and is detachably connected with the battery shell, a through groove is formed in the cover plate main body, and the plastic part is detachably connected with the cover plate main body. The tab can penetrate through the through groove and is arranged outside the cover plate assembly in a folded mode, a groove is formed in the top face and / or the bottom face of the cover plate body, a protrusion is arranged at the position corresponding to the plastic part, the protrusion can be inserted into the groove and is in ultrasonic hot melting connection with the groove, and a tab shaping structure is arranged on part of the plastic part. The stability and reliability of connection are enhanced through ultrasonic hot melting connection, and the installation efficiency is improved; the tab shaping structure is arranged, so that the shape of the folded tab is better, the tab is protected, and short circuit between the tab and the battery shell caused by poor tab folding shape is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, in particular to a 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 part. The plastic part is generally arranged on the upper and lower sides of the cover plate to insulate and seal the cover plate. The connection method between the plastic part 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, 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 cover plate 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 present utility model is:

[0006] A cover plate connection structure, comprising:

[0007] The cover plate assembly includes a cover plate body and a plastic part. The cover plate body is covered on the battery shell and is detachably connected to the battery shell. A through groove is provided on the cover plate body, and the tab can pass through the through groove and be folded and arranged on the outside of the cover plate assembly. A groove is provided on the top surface and / or bottom surface of the cover plate body, and a protrusion is provided at the corresponding position of the plastic part. The protrusion can be inserted into the groove and ultrasonically hot-melt connected to the groove. Some of the plastic parts are provided with a tab shaping structure.

[0008] Preferably, the sidewall of the groove extends vertically along the thickness direction of the cover plate body.

[0009] Preferably, the sidewalls of the groove are inclined from outside to inside along the radial direction of the groove to form a dovetail groove.

[0010] Preferably, the side wall of the groove is stepped, and the groove includes at least two mutually connected grooves from the inside to the outside. Among the two adjacent grooves, the radius of the groove close to the outside is larger than the radius of the groove close to the inside.

[0011] Preferably, a reinforcement groove is provided on the side wall of at least one of the slots.

[0012] Preferably, the shape of the groove along the horizontal cross section is at least one of a circle, a racetrack, a rectangle and a triangle, and the shape of the protrusion is set correspondingly.

[0013] Preferably, the plastic part includes a first plastic part and a second plastic part that are molded separately, the bottom of the first plastic part protrudes downward to form the protrusion and is connected to the groove at the top of the cover body, and the top of the second plastic part protrudes upward to form the protrusion and is connected to the groove at the bottom of the cover body.

[0014] Preferably, the second plastic part is plate-shaped, a plurality of protrusions are arranged on the top surface of the second plastic part at intervals along the circumference of the second plastic part, and a first connecting groove is provided at a position of the second plastic part corresponding to the through groove, and the first connecting groove is connected to the through groove.

[0015] Preferably, the first plastic part is in the shape of a plate, and a plurality of protrusions are provided in the middle of the first plastic part, and the plurality of protrusions are arranged in a rectangular array. A second connecting groove is provided at a position of the first plastic part corresponding to the through groove, and two second connecting grooves are provided on each first plastic part, and the two second connecting grooves are symmetrically arranged on both sides of the protrusion, and the second connecting groove is connected to the through groove.

[0016] Preferably, an explosion-proof valve is provided in the middle of the cover plate body, and two first plastic parts are provided, and the 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 connection structure proposed by the present invention, when in use, firstly, the plastic part is placed opposite the surface to be installed of the cover plate body, and the protrusions are aligned one by one with the grooves, and then the protrusions are inserted into the grooves to achieve a preliminary fixation of the plastic part and the cover plate body, and then the protrusions are melted by ultrasonic hot melt vibration, and then fixed to the grooves after cooling, thereby completing the fixation between the plastic part and the cover plate body. Compared with traditional glue adhesion, the ultrasonic hot melt connection method of the groove and the protrusion is more stable, effectively avoiding the problem of debonding during use, and enhancing the stability and reliability of the connection. Compared with complex mechanical fixing methods, ultrasonic hot melt connection is simple and quick to operate, reducing the tedious steps in the installation process, saving installation time and labor costs. The tabs pass through the through slots and are folded outside the cover plate assembly, thereby improving the space utilization inside the battery shell. The setting of the tab shaping structure can make the tabs have a better shape after being folded, protect the tabs, and prevent the tabs from short-circuiting with the battery shell due to poor folding shape, 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 cover plate connection structure provided in the first embodiment of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the first plastic part provided in Example 1 of the present utility model;

[0021] Figure 3 This is a schematic structural diagram of the second plastic part provided in the first embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the groove provided in Example 1 of the present utility model;

[0023] Figure 5 This is a front view of the groove provided in the second embodiment of the present utility model;

[0024] Figure 6 This is a front view of the groove provided in the third embodiment of the present invention;

[0025] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0026] In the picture:

[0027] 1. Cover plate assembly; 11. Battery housing; 12. Cover plate body; 121. Through groove; 122. Groove; 1221. Card slot; 1222. Reinforcement slot; 123. Explosion-proof valve; 124. Liquid filling port; 13. Plastic part; 130. Protrusion; 131. First plastic part; 1311. Second connecting groove; 132. Second plastic part; 1321. First connecting groove; 133. Tab shaping structure. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] Example 1

[0033] See also Figures 1 to 4 The 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 cover plate body 12 and a plastic part 13. The cover plate body 12 is covered with a battery housing 11 and is detachably connected to the battery housing 11. A through slot 121 is provided on the cover plate body 12. The tab can pass through the through slot 121 and be folded and arranged on the outside of the cover plate assembly 1. A groove 122 is provided on the top surface and / or bottom surface of the cover plate body 12. A protrusion 130 is provided at a corresponding position of the plastic part 13. The protrusion 130 can be inserted into the groove 122 and ultrasonically hot-melt-connected to the groove 122. A tab shaping structure 133 is provided on part of the plastic part 13.

[0034] The cover plate connection structure proposed by the present invention, when in use, firstly, the plastic part 13 is placed opposite the surface to be installed of the cover plate body 12, and the protrusion 130 is aligned one by one with the groove 122, and then the protrusion 130 is inserted into the groove 122 to achieve a preliminary fixation of the plastic part 13 and the cover plate body 12, and then the protrusion 130 is melted by ultrasonic hot melt vibration, and then fixed to the groove 122 after cooling, thereby completing the fixation between the plastic part 13 and the cover plate body 12. Compared with traditional glue adhesion, the ultrasonic hot melt connection method of the groove 122 and the protrusion 130 is more stable, effectively avoiding the problem of debonding during use, and enhancing the stability and reliability of the connection. Compared with complex mechanical fixing methods, ultrasonic hot melt connection is simple and quick to operate, reducing the tedious steps in the installation process, saving installation time and labor costs. 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. The provision of the tab shaping structure 133 can make the tab have a better shape after being folded, protect the tab, and prevent the tab from short-circuiting with the battery housing 11 due to poor tab folding shape, thereby further improving the performance and safety of the battery.

[0035] See also Figure 4 Specifically, regarding the specific structure of groove 122, the sidewalls of groove 122 extend vertically along the thickness direction of cover body 12. On the one hand, this vertical extension design increases the contact area between groove 122 and protrusion 130, thereby further enhancing the stability and reliability of the ultrasonic heat fusion connection, making the connection between plastic part 13 and cover body 12 more secure and effectively preventing loosening during long-term use or in complex environments. On the other hand, the vertical sidewall structure is relatively simple and easy to manufacture, also facilitating the operator's insertion and connection of protrusion 130 into groove 122.

[0036] More specifically, the shape of the groove 122 along the horizontal cross section is at least one of a circle, a runway, a rectangle and a triangle, and the shape of the protrusion 130 is set correspondingly. The choice of multiple shapes increases the flexibility of the design. The most suitable shape of the groove 122 and the protrusion 130 can be selected according to the specific needs and usage scenarios of the cover plate connection structure to achieve the best connection effect and performance. Grooves 122 and protrusions 130 of different shapes can adapt to different stress distributions and load conditions. Specifically, the circular and runway-shaped grooves 122 have better stability when subjected to multi-directional stress; the rectangular and triangular grooves 122 can provide stronger support and connection strength in specific directions. In the actual production process, you can choose according to actual needs and there is no limitation here. The setting of the corresponding shape of the protrusion 130 ensures a close fit between the groove 122 and the protrusion 130, further improves the quality and reliability of the ultrasonic hot melt connection, and effectively prevents gaps or loosening in the connection parts.

[0037] Regarding the specific structure of the plastic component 13, it comprises a first plastic component 131 and a second plastic component 132, each of which is separately molded. The bottom of the first plastic component 131 projects downward to form a protrusion 130, which connects to the groove 122 at the top of the cover body 12. The top of the second plastic component 132 projects upward to form a protrusion 130, which connects to the groove 122 at the bottom of the cover body 12. Separately molded first and second plastic components 131, 132 facilitate production and processing. Appropriate materials and processes can be selected based on their respective characteristics and requirements, improving production efficiency and reducing costs. The first plastic component 131 connects to the groove 122 at the top of the cover body 12, while the second plastic component 132 connects to the groove 122 at the bottom of the cover body 12. This allows for more targeted securing and protection of the upper and lower sides of the cover body 12, enhancing the stability of the overall structure. Furthermore, if one side of the plastic component 13 becomes damaged or requires replacement, it can be repaired separately without replacing the entire plastic component 13, reducing maintenance costs and difficulty.

[0038] In other embodiments, the first plastic part 131 and the second plastic part 132 may also be integrally formed, which will not be described in detail here.

[0039] See also Figure 3 Specifically, the second plastic part 132 is plate-shaped, and a plurality of protrusions 130 are arranged on the top surface of the second plastic part 132 at intervals along the circumference of the second plastic part 132. A first connecting groove 1321 is provided at a position on the second plastic part 132 corresponding to the through groove 121, and the first connecting groove 1321 is connected to the through groove 121. The plate-shaped second plastic part 132 has a simple structure and is easy to manufacture, thereby reducing production costs. The multiple protrusions 130 arranged at intervals can provide stable support and connection from multiple points, making the connection between the second plastic part 132 and the cover body 12 more secure. The evenly distributed protrusions 130 effectively disperse the force, improving the stability and reliability of the connection. The arrangement of the first connecting groove 1321 in communication with the through groove 121 optimizes the internal structural layout, facilitates the passage and layout of the tabs, and improves the utilization rate of the internal space of the battery.

[0040] More specifically, a tab shaping structure 133 is provided on the second plastic part 132. The tab shaping structure 133 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.

[0041] See also Figure 2Specifically, the first plastic component 131 is plate-shaped, with multiple protrusions 130 arranged in a rectangular array in the middle. Second connecting grooves 1311 are provided on the first plastic component 131 at positions corresponding to the through-slots 121. Each first plastic component 131 is provided with two second connecting grooves 1311, symmetrically located on either side of the protrusion 130. The second connecting grooves 1311 communicate with the through-slots 121. The plate-shaped first plastic component 131 has a regular structure and is easy to manufacture and process, reducing manufacturing difficulty and cost. The multiple protrusions 130 arranged in a rectangular array in the middle provide uniform and stable connection support, enhancing the firmness and stability of the connection between the first plastic component 131 and the cover body 12, and effectively avoiding connection problems caused by uneven local force. The two second connecting grooves 1311 that are symmetrically arranged and connected to the through groove 121 are beneficial to the layout and passage of the tabs, optimizing the internal structure of the battery; on the other hand, the symmetrical design makes the force on the first plastic part 131 more balanced when connected to the cover body 12, further improving the reliability of the connection.

[0042] Among them, the distance between the surface of the first plastic part 131 and the 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 first plastic part 131 from being too small, resulting in low strength of the cover assembly 1; on the other hand, it prevents the thickness of the first plastic part 131 from being too large, resulting in low space utilization of the plastic part 13.

[0043] More specifically, an explosion-proof valve 123 is provided in the middle of the cover body 12, and two first plastic parts 131 are provided, with the two first plastic parts 131 symmetrically arranged on both sides of the explosion-proof valve 123. The provision of the explosion-proof valve 123 enhances the safety of battery use. When the internal pressure of the battery rises abnormally, the explosion-proof valve 123 can be activated in time to release the pressure, preventing dangerous situations such as battery explosion, thereby ensuring the safety of equipment and personnel. The two first plastic parts 131 are symmetrically arranged on both sides of the explosion-proof valve 123, which can provide balanced support and protection around the explosion-proof valve 123, ensuring the stability and reliability of the explosion-proof valve 123 under normal working conditions. At the same time, the symmetrical layout is conducive to the uniform distribution of force, improving the strength and stability of the entire cover connection structure.

[0044] It is understandable that the explosion-proof valve 123 is an existing mechanical device in the art, and its working principle and specific structure are not described in detail here.

[0045] In addition, it is worth noting that the notch on the explosion-proof valve 123 may face the inside of the battery housing 11 or the outside of the battery housing 11 , or may not be provided, which is not limited here.

[0046] 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.

[0047] In addition, the cover body 12 is also provided with a liquid injection port 124, which connects the interior of the battery housing 11 with the external environment. The presence of the liquid injection port 124 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 liquid injection port 124 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 liquid injection port 124, 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.

[0048] Example 2

[0049] Figure 5 The second embodiment is shown, wherein the components identical or corresponding to those in the first embodiment are denoted by the corresponding reference numerals in the first embodiment. For simplicity, only the differences between the second embodiment and the first embodiment are described. The differences are:

[0050] Regarding the specific structure of the groove 122, the side walls of the groove 122 are inclined from the outside to the inside along the radial direction of the groove 122 to form a dovetail groove. The dovetail groove structure increases the self-locking property of the connection between the groove 122 and the protrusion 130. The inclined side walls make it more difficult for the protrusion 130 to dislodge after insertion, thereby improving the stability of the connection and effectively preventing the protrusion 130 from detaching from the groove 122 during long-term use or when subjected to external forces, thereby ensuring the reliability of the connection between the plastic part 13 and the cover body 12. Secondly, the inclined side walls help to disperse the stress at the connection site. When subjected to external forces such as vibration and impact, the stress can be distributed more evenly throughout the entire connection area, reducing local stress concentration and extending the service life of the connection structure.

[0051] Example 3

[0052] Figure 6 and Figure 7 The third embodiment is shown, wherein the components identical or corresponding to those in the first embodiment are denoted by the corresponding reference numerals in the first embodiment. For simplicity, only the differences between the third embodiment and the first embodiment are described. The differences are:

[0053] Regarding the specific structure of the groove 122, the sidewalls of the groove 122 are stepped. The groove 122 includes at least two mutually connected slots 1221 from the inside out. Of the two adjacent slots 1221, the radius of the slot 1221 closer to the outside is larger than the radius of the slot 1221 closer to the inside. The stepped structure increases the contact area and friction between the groove 122 and the protrusion 130. After the protrusion 130 is inserted into the groove 122, it can be more firmly retained therein, improving the stability of the connection and reducing the possibility of loosening the connection. When subjected to external force, the stress can be gradually transmitted and dispersed along the stepped sidewalls, avoiding stress concentration at a single point, thereby enhancing the fatigue resistance and service life of the cover plate connection structure.

[0054] More specifically, at least one of the sidewalls of the slot 1221 is provided with a reinforcement groove 1222. The provision of the reinforcement groove 1222 further increases the contact area and friction between the protrusion 130 and the groove 122, thereby improving the stability of the connection. Even under significant external force or prolonged use, the protrusion 130 can be effectively prevented from dislodging from the groove 122, thereby enhancing the reliability of the cover plate connection structure. Furthermore, the reinforcement groove 1222 helps disperse stress. When the connection portion is subjected to external force, the stress can be dispersed to a wider area through the reinforcement groove 1222, reducing local stress concentration, lowering the risk of damage to the connection structure, and extending its service life.

[0055] 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 connection structure, characterized in that: include: A cover assembly (1) comprises a cover body (12) and a plastic part (13), wherein the cover body (12) is covered on a battery housing (11) and is detachably connected to the battery housing (11), a through slot (121) is provided on the cover body (12), and a tab can pass through the through slot (121) and be folded and arranged on the outside of the cover assembly (1), a groove (122) is provided on the top surface and / or the bottom surface of the cover body (12), a protrusion (130) is provided at a corresponding position of the plastic part (13), the protrusion (130) can be inserted into the groove (122) and ultrasonically hot-melt-connected to the groove (122), and a tab shaping structure (133) is provided on part of the plastic part (13).

2. The cover plate connection structure according to claim 1, characterized in that: The side wall of the groove (122) extends vertically along the thickness direction of the cover plate body (12).

3. The cover plate connection structure according to claim 1, characterized in that: The side wall of the groove (122) is inclined from outside to inside along the radial direction of the groove (122) to form a dovetail groove.

4. The cover plate connection structure according to claim 1, characterized in that: The side wall of the groove (122) is stepped. The groove (122) comprises at least two mutually connected grooves (1221) from the inside to the outside. Of the two adjacent grooves (1221), the radius of the groove (1221) closer to the outside is larger than the radius of the groove (1221) closer to the inside.

5. The cover plate connection structure according to claim 4, characterized in that: A reinforcement groove (1222) is provided on the side wall of at least one of the slots (1221).

6. The cover plate connection structure according to claim 1, characterized in that: The shape of the groove (122) along the horizontal cross section is at least one of a circle, a racetrack, a rectangle and a triangle, and the shape of the protrusion (130) is set correspondingly.

7. The cover plate connection structure according to any one of claims 1 to 6, characterized in that: The plastic part (13) comprises a first plastic part (131) and a second plastic part (132) which are separately molded. The bottom of the first plastic part (131) protrudes downward to form the protrusion (130) and is connected to the groove (122) at the top of the cover plate body (12). The top of the second plastic part (132) protrudes upward to form the protrusion (130) and is connected to the groove (122) at the bottom of the cover plate body (12).

8. The cover plate connection structure according to claim 7, characterized in that: The second plastic part (132) is plate-shaped, and a plurality of protrusions (130) are arranged on the top surface of the second plastic part (132) at intervals along the circumference of the second plastic part (132). The second plastic part (132) is provided with a first connecting groove (1321) at a position corresponding to the through groove (121), and the first connecting groove (1321) is connected to the through groove (121).

9. The cover plate connection structure according to claim 7, characterized in that: The first plastic part (131) is plate-shaped, and a plurality of protrusions (130) are provided in the middle of the first plastic part (131), and the plurality of protrusions (130) are arranged in a rectangular array. A second connecting groove (1311) is provided at a position of the first plastic part (131) corresponding to the through groove (121), and each first plastic part (131) is provided with two second connecting grooves (1311), and the two second connecting grooves (1311) are symmetrically arranged on both sides of the protrusion (130), and the second connecting groove (1311) is connected to the through groove (121).

10. The cover plate connection structure according to claim 7, characterized in that: An explosion-proof valve (123) is provided in the middle of the cover plate body (12), and two first plastic parts (131) are provided. The two first plastic parts (131) are symmetrically arranged on both sides of the explosion-proof valve (123).

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