Battery top cover assembly and battery

Abstract

A battery top cover assembly and a battery. The battery top cover assembly comprises a cover plate (100), collars (200), wrapping rubbers (300), and terminals (400). Mounting holes (101) are formed on the cover plate (100), a central hole (201) axially runs through each collar (200), the bottom of each collar (200) extends inward along the radial direction of the central hole (201) to form a first annular boss (210), and the bottom of each collar (200) passes through the corresponding mounting hole (101). The wrapping rubbers (300) wrap the peripheries of the tops of the collars (200), and the bottom surfaces of the wrapping rubbers (300) are connected to the cover plate (100). Each terminal (400) comprises a first step (410) and a second step (420) which are successively connected from top to bottom, the first step (410) passes through the inner ring of the corresponding first annular boss (210), the side surface of the first step (410) is connected to the inner ring of the corresponding first annular boss (210), and the end surface of the second step (420) is connected to the bottom surface of the corresponding collar (200).

Description

Battery top cover assembly and battery

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 3, 2023, with application number 202322975228.X. The entire contents of this application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, for example, to a battery top cover assembly and a battery. Background Art

[0003] As a crucial component of new energy batteries, power batteries are closely linked to the development of new energy vehicles. The rapid growth of new energy vehicles has increased the demand for power batteries, while also placing increasingly stringent demands on their performance. Battery safety and practicality are particularly crucial performance parameters, and the connection quality of the power battery cover assembly is paramount.

[0004] In related technologies, the power battery top cover assembly is constructed by injection molding or riveting the terminal post together with a sealing ring. While injection molding is simple, weld-free, and low-cost, its sheer reliance on rubberized plastic for secure connection results in poor long-term battery reliability, making it unsuitable for new energy vehicles. Riveted construction offers improved reliability, but involves numerous parts and processes, resulting in high costs.

[0005] Summary of the Invention

[0006] The present application provides a battery top cover assembly and a battery with high connection strength, simple connection structure and low cost.

[0007] The present invention provides a battery top cover assembly, comprising:

[0008] A cover plate, wherein a mounting hole is provided on the cover plate;

[0009] A collar, wherein a center hole is axially penetrated through the collar, a bottom portion of the collar extends radially inwardly along the center hole to form a first annular boss, and the bottom portion of the collar is passed through the mounting hole;

[0010] A rubber bag is wrapped around the top periphery of the collar, and the bottom surface of the rubber bag is connected to the cover plate;

[0011] The pole includes a first step and a second step connected in sequence from top to bottom, the first step is passed through the inner ring of the first annular boss, and the side surface of the first step is connected to the inner ring of the first annular boss, and the end face of the second step is connected to the bottom surface of the ring.

[0012] In one embodiment, the side surface of the first step is welded to the inner ring of the first annular boss, and the end surface of the second step is welded to the bottom surface of the collar.

[0013] In one embodiment, a plurality of slots are formed on the outer periphery of the top of the collar, and a plurality of rubber buckles are provided on the inner ring of the rubber bag. The rubber buckles are clamped in the corresponding slots to clamp the rubber bag and the collar.

[0014] In one embodiment, a plurality of positioning grooves are provided on the cover along the outer periphery of the mounting hole, and a plurality of protrusions are provided on the bottom surface of the rubber package, and the protrusions are inserted into the corresponding positioning grooves.

[0015] In one embodiment, the battery top cover assembly further includes a sealing ring, which includes a large diameter section and a small diameter section connected to each other, the small diameter section is passed through the mounting hole, and the side surface of the small diameter section is connected to the inner ring of the mounting hole, the end surface of the large diameter section is connected to the bottom surface of the cover plate, and the second step is passed through the inner ring of the large diameter section, and the inner ring of the large diameter section is connected to the side surface of the second step.

[0016] In one embodiment, the pole further includes a third step connected to the second step, and the bottom surface of the large-diameter section is connected to the end surface of the third step.

[0017] In one embodiment, the battery top cover assembly further includes an insulating frame, the insulating frame is located at the bottom of the cover plate, and a avoidance hole is provided on the insulating frame, and the sealing ring and the pole are both provided with the avoidance hole.

[0018] In one embodiment, a second annular boss is provided on the end surface of the insulating frame along the outer periphery of the avoidance hole, and a first groove is provided on the bottom surface of the cover plate along the outer periphery of the mounting hole, and the second annular boss is inserted into the first groove.

[0019] In one embodiment, a second groove is formed along the bottom of the inner ring of the second annular boss, and the third step is inserted into the bottom of the second groove.

[0020] An embodiment of the present application also provides a battery, comprising a battery cell, a shell having an opening, and the above-mentioned battery top cover assembly, wherein the battery cell is located in the shell, and the battery top cover assembly is connected to the opening of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following is a brief introduction to the drawings required for use in the description of the embodiments of this application. Obviously, the drawings described below are only some embodiments of this application. For ordinary technicians in this field, without any creative work, other drawings can be obtained based on the content of the embodiments of this application and these drawings.

[0022] FIG1 is an exploded view of a battery top cover assembly provided in an embodiment of the present application;

[0023] FIG2 is a partial cross-sectional view of a battery top cover assembly provided in an embodiment of the present application;

[0024] FIG3 is a schematic structural diagram of a cover plate of a battery top cover assembly provided in an embodiment of the present application;

[0025] FIG4 is a schematic structural diagram of a collar of a battery top cover assembly provided in an embodiment of the present application;

[0026] FIG5 is a schematic diagram of the front structure of the rubber encapsulation of the battery top cover assembly provided in an embodiment of the present application;

[0027] FIG6 is a schematic diagram of the reverse side structure of the rubber encapsulation of the battery top cover assembly provided in an embodiment of the present application;

[0028] FIG7 is a schematic structural diagram of a pole of a battery top cover assembly provided in an embodiment of the present application;

[0029] FIG8 is a schematic structural diagram of a sealing ring of a battery top cover assembly provided in an embodiment of the present application;

[0030] FIG9 is a schematic structural diagram of the insulating frame of the battery top cover assembly provided in an embodiment of the present application.

[0031] In the picture:

[0032] 100, cover plate; 101, mounting hole; 102, positioning groove; 103, first groove; 200, collar; 210, first annular boss; 201, center hole; 202, slot; 300, rubber coating; 310, rubber buckle; 320, protrusion; 330, symbol identification; 400, pole; 410, first step; 420, second step; 430, third step; 500, sealing ring; 510, large diameter section; 520, small diameter section; 600, insulating frame; 610, second annular boss; 601, avoidance hole; 602, second groove. DETAILED DESCRIPTION

[0033] The present application is described below in conjunction with the accompanying drawings and embodiments. It is understood that the embodiments described herein are merely intended to explain the present application, rather than to limit the present application. For ease of description, the accompanying drawings only show portions, rather than all, of the structure relevant to the present application.

[0034] In the description of this application, 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 connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. A person of ordinary skill in the art will be able to understand the meaning of the above terms in this application according to the circumstances.

[0035] In this application, 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 includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature's horizontal height is higher than the second feature's horizontal height. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature's horizontal height is lower than the second feature's horizontal height.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., regarding orientations or positions, are based on the orientations or positions shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0037] The present application provides a battery top cover assembly with high connection strength, simple connection structure and low cost.

[0038] As shown in Figures 1, 2, and 4, the battery top cover assembly includes a cover plate 100, a collar 200, a rubber overlay 300, and a terminal 400. The cover plate 100 is provided with a mounting hole 101. The collar 200 is provided with a center hole 201 extending axially through the cover plate 100. A first annular boss 210 is formed at the bottom of the collar 200, extending radially inward from the center hole 201. The bottom of the collar 200 is inserted into the mounting hole 101. The rubber overlay 300 is wrapped around the top periphery of the collar 200, and the bottom surface of the rubber overlay 300 is connected to the cover plate 100. The terminal 400 includes a first step 410 and a second step 420 connected sequentially from top to bottom. The first step 410 is inserted into the inner ring of the first annular boss 210, and the side surface of the first step 410 is connected to the inner ring of the first annular boss 210. The end surface of the second step 420 is connected to the bottom surface of the collar 200. The first annular boss 210, in conjunction with the first step 410 and the second step 420, increases the contact area between the collar 200 and the terminal 400, thereby enhancing the connection strength between the terminal 400 and the collar 200. This connection structure is simple and low-cost. Compared to related art methods that rely solely on the rubber coating 300 for fixed connection, the connection strength is higher; compared to riveted connections, the connection is simpler and less expensive.

[0039] The side surface of the first step 410 is welded to the inner ring of the first annular boss 210, and the end surface of the second step 420 is welded to the bottom surface of the collar 200. The welding connection has high strength and is easy to operate.

[0040] As shown in Figures 4, 5, and 6, in some embodiments, the top periphery of the collar 200 is provided with a plurality of slots 202, and the inner ring of the rubber lagging 300 is provided with a plurality of rubber buckles 310. The rubber buckles 310 are positioned in corresponding slots 202 to securely connect the rubber lagging 300 to the collar 200. The slots 202 and the rubber buckles 310 cooperate to prevent rotational misalignment of the collar 200, increase the connection strength between the rubber lagging 300 and the collar 200, and further enhance the insulation performance of the rubber lagging 300. In this embodiment, there are three slots 202, which are evenly spaced along the top periphery of the collar 200, providing a strong and aesthetically pleasing connection.

[0041] As shown in Figures 3 and 6, the cover plate 100 is provided with a plurality of positioning grooves 102 along the periphery of the mounting hole 101. The bottom surface of the rubber lagging 300 is provided with a plurality of protrusions 320, which are inserted into corresponding positioning grooves 102. The positioning grooves 102 and protrusions 320 cooperate to position and prevent the rubber lagging 300 surrounding the collar 200, thereby increasing the connection strength between the rubber lagging 300 and the cover plate 100. In this embodiment, there are three positioning grooves 102, which are evenly spaced along the mounting hole 101.

[0042] A symbol mark 330 is provided on the end surface of the rubber bag 300 .

[0043] As shown in Figures 1, 2, and 8, the battery top cover assembly further includes a sealing ring 500, which includes a large-diameter section 510 and a small-diameter section 520 that are connected to each other. The small-diameter section 520 is disposed through the mounting hole 101, and the side surface of the small-diameter section 520 is connected to the inner circle of the mounting hole 101. The end surface of the large-diameter section 510 is connected to the bottom surface of the cover plate 100. The second step 420 is disposed through the inner circle of the large-diameter section 510, and the inner circle of the large-diameter section 510 is connected to the side surface of the second step 420. The provision of the sealing ring 500 enhances the sealing performance of the battery top cover assembly. The provision of the large-diameter section 510 and the small-diameter section 520 increases the contact area between the sealing ring 500, the cover plate 100, and the terminal 400, which can further enhance the sealing effect of the sealing ring 500.

[0044] As shown in FIG7 , the pole 400 further includes a third step 430 connected to the second step 420 , and the bottom surface of the large-diameter section 510 is connected to the end surface of the third step 430 , further increasing the connection area between the sealing ring 500 and the pole 400 , thereby increasing the sealing effect of the sealing ring 500 .

[0045] In order to improve the insulation performance of the battery top cover assembly, as shown in Figure 9, the battery top cover assembly also includes an insulating frame 600, which is located at the bottom of the cover plate 100. The insulating frame 600 is provided with an avoidance hole 601, and the sealing ring 500 and the pole 400 are both provided with the avoidance hole 601.

[0046] Continuing with Figures 2 and 9 , a second annular boss 610 is provided on the upper edge of the end surface of the insulating frame 600, circumferentially around the avoidance hole 601. A first groove 103 is provided on the bottom surface of the cover plate 100, circumferentially around the mounting hole 101. The second annular boss 610 is inserted into the first groove 103. The cooperation between the second annular boss 610 and the first groove 103 facilitates the positioning and installation of the insulating frame 600, and provides a high-strength plug-in connection.

[0047] Continuing with FIG2 , a second groove 602 is defined along the bottom of the inner circumference of the second annular boss 610, and the third step 430 is inserted into the bottom of the second groove 602. The second groove 602 and the third step 430 cooperate to enable a plug-and-socket connection between the insulating frame 600 and the terminal 400, providing a strong plug-and-socket connection and thereby extending the service life of the battery top cover assembly.

[0048] In this embodiment, the insulating frame 600 includes a main body and brackets located at both ends of the main body, and the main body is located at the bottom of the cover plate 100 .

[0049] In this embodiment, the poles 400 of the battery top cover assembly include a positive pole 400 and a negative pole 400, and the cover plate 100 is provided with two symmetrically distributed mounting holes 101. Therefore, the battery top cover assembly includes two collars 200, two rubber coatings 300, and two sealing rings 500. In this embodiment, the structure and assembly method of the positive pole 400 and the negative pole 400 are the same and will not be described in detail here. In other embodiments, the structure and assembly method of the positive pole 400 and the negative pole 400 may also be different and can be set according to the needs of use.

[0050] The present application also provides a battery comprising a battery cell, a housing having an opening, and the aforementioned battery cover assembly, wherein the battery cell is located within the housing, and the battery cover assembly is connected to the opening of the housing. Because the battery includes the aforementioned battery cover assembly, the battery has high reliability, a simple structure, and low cost.

Claims

1. A battery top cover assembly, comprising: A cover plate (100), wherein the cover plate (100) is provided with a mounting hole (101); A collar (200), wherein a center hole (201) is axially penetrated through the collar (200), a first annular boss (210) is formed at the bottom of the collar (200) extending radially inwardly along the center hole (201), and the bottom of the collar (200) is penetrated through the mounting hole (101); A rubber bag (300) is wrapped around the top periphery of the collar (200), and the bottom surface of the rubber bag (300) is connected to the cover plate (100); A pole (400), the pole (400) comprising a first step (410) and a second step (420) connected in sequence from top to bottom, the first step (410) being inserted into the inner ring of the first annular boss (210), and the side surface of the first step (410) being connected to the inner ring of the first annular boss (210), and the end surface of the second step (420) being connected to the bottom surface of the collar (200).

2. The battery top cover assembly according to claim 1, wherein: The side surface of the first step (410) is welded to the inner circle of the first annular boss (210), and the end surface of the second step (420) is welded to the bottom surface of the collar (200).

3. The battery top cover assembly according to claim 1, wherein: The top periphery of the collar (200) is provided with a plurality of grooves (202), and the inner ring of the rubber bag (300) is provided with a plurality of rubber buckles (310), and the rubber buckles (310) are clamped in the corresponding grooves (202) so that the rubber bag (300) is clamped with the collar (200).

4. The battery top cover assembly according to claim 1, wherein: A plurality of positioning grooves (102) are provided on the cover plate (100) along the outer periphery of the mounting hole (101), and a plurality of protrusions (320) are provided on the bottom surface of the rubber package (300), and the protrusions (320) are inserted into corresponding positioning grooves (102).

5. The battery top cover assembly according to claim 1, further comprising a sealing ring (500), the sealing ring (500) comprising a large diameter section (510) and a small diameter section (520) connected to each other, the small diameter section (520) being passed through the mounting hole (101), and the side surface of the small diameter section (520) being connected to the inner circle of the mounting hole (101), the end surface of the large diameter section (510) being connected to the bottom surface of the cover plate (100), and the second step (420) being passed through the inner circle of the large diameter section (510), and the inner circle of the large diameter section (510) being connected to the side surface of the second step (420).

6. The battery top cover assembly according to claim 5, wherein: The pole (400) further comprises a third step (430) connected to the second step (420), and the bottom surface of the large-diameter section (510) is connected to the end surface of the third step (430).

7. The battery top cover assembly according to claim 6 further comprises an insulating frame (600), wherein the insulating frame (600) is located at the bottom of the cover plate (100), and a avoidance hole (601) is provided on the insulating frame (600), and the sealing ring (500) and the pole (400) are both provided with the avoidance hole (601).

8. The battery top cover assembly according to claim 7, wherein: A second annular boss (610) is provided on the end surface of the insulating frame (600) along the outer periphery of the avoidance hole (601), and a first groove (103) is provided on the bottom surface of the cover plate (100) along the outer periphery of the mounting hole (101), and the second annular boss (610) is plugged into the first groove (103).

9. The battery top cover assembly according to claim 8, wherein: A second groove (602) is provided along the bottom of the inner circle of the second annular boss (610), and the third step (430) is inserted into the bottom of the second groove (602).

10. A battery, comprising a battery cell and a shell having an opening, the battery further comprising a battery top cover assembly as described in any one of claims 1 to 9, the battery cell is located in the shell, and the battery top cover assembly is connected to the opening of the shell.

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