Pole structure, top cover assembly and battery

Abstract

The utility model discloses a pole structure, a top cover assembly and a battery, the pole structure comprises: a pole body, the peripheral side of the pole body is provided with a first anti-rotation groove and a first anti-rotation positioning hole; the edge of the inner side of the aluminum ring extends upwards to form an enclosing wall blocking cover structure, and a second anti-rotation groove and a second anti-rotation positioning hole are formed in the upper surface of the enclosing wall blocking cover structure; and the injection molding parts are filled in gaps among the injection molding parts, the pole column body and the aluminum ring, the peripheral side of the pole column body and the upper surface of the enclosing wall blocking cover structure. According to the pole structure, the top cover assembly and the battery provided by the embodiment of the invention, when the injection molding part is filled, mutual rotation between the pole body and the aluminum ring is prevented through the anti-rotation positioning effect of the first anti-rotation positioning hole and the second anti-rotation positioning hole; after filling and injection molding, mutual rotation between the pole body and the aluminum ring is prevented through the first anti-rotation groove and the second anti-rotation groove, so that the assembly accuracy and precision of the top cover assembly are improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to an electrode structure, a top cover assembly, and a battery. Background Technology

[0002] In the assembly process of the top cover assembly of a secondary battery, the conventional method is to use injection molding to fill the gap between the terminal post and the aluminum ring, so that the two form a single piece. Then, the aluminum ring is welded to the top cover plate to complete the fixed connection between the terminal post and the top cover plate.

[0003] However, the existing technology provides electrode posts and aluminum rings with certain structural design flaws. During actual injection molding, the relative positions of the electrode posts and aluminum rings often rotate, leading to poor assembly accuracy or precision of the electrode posts, aluminum rings, and even the entire top cover assembly, thus affecting the quality and reliability of the secondary battery top cover assembly. Utility Model Content

[0004] The purpose of this application is to provide a pole post structure, a top cover assembly, and a battery to solve the aforementioned technical problems.

[0005] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:

[0006] This application provides a pole post structure, including:

[0007] The electrode body has a first anti-rotation groove and a first anti-rotation positioning hole on its periphery;

[0008] An aluminum ring, with an inner edge extending upwards to form a retaining wall structure, and the upper surface of the retaining wall structure being provided with a second anti-rotation groove and a second anti-rotation positioning hole.

[0009] The injection molded parts are filled in the gap between the pole body and the aluminum ring, the periphery of the pole body, and the upper surface of the enclosure cover structure.

[0010] The first anti-rotation positioning hole and the second anti-rotation positioning hole are used to prevent rotation and position the injection molded part during filling. The injection molded part is filled with the first anti-rotation groove and the second anti-rotation groove.

[0011] In some embodiments, the second anti-rotation positioning hole and the first anti-rotation positioning hole are positioned correspondingly, and the hole size of the second anti-rotation positioning hole is larger than the hole size of the first anti-rotation positioning hole.

[0012] In some embodiments, the first anti-rotation positioning hole is located in the first anti-rotation groove, and / or the second anti-rotation positioning hole is located in the second anti-rotation groove.

[0013] In some embodiments, the periphery of the pole body is provided with a plurality of spaced-apart first anti-rotation grooves and a plurality of spaced-apart first anti-rotation positioning holes, and the upper surface of the wall cover structure is provided with a plurality of spaced-apart second anti-rotation grooves and a plurality of spaced-apart second anti-rotation positioning holes.

[0014] In some embodiments, the periphery of the pole body is provided with a sloping surface, the injection molded part covers the sloping surface of the pole body, and the top of the pole body protrudes from the injection molded part.

[0015] In some embodiments, the upper surface of the wall cover structure is further provided with an anti-rotation boss with a bevel, and the injection molded part covers the anti-rotation boss.

[0016] This application provides a top cover assembly, including the aforementioned pole post structure.

[0017] This application provides a battery, including the above-described terminal structure or the above-described top cover assembly.

[0018] Compared with the prior art, the beneficial effects of the embodiments of this application are:

[0019] The present application provides an electrode post structure, a top cover assembly, and a battery. During injection molding, the electrode post body and the aluminum ring are prevented from rotating relative to each other by the anti-rotation positioning function of the first anti-rotation positioning hole and the second anti-rotation positioning hole (for example, during injection molding, the insert pin is inserted through the first anti-rotation positioning hole and the second anti-rotation positioning hole). After injection molding, the electrode post body and the aluminum ring are prevented from rotating relative to each other by the first anti-rotation groove and the second anti-rotation groove, thereby improving the assembly accuracy and precision of the top cover assembly. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the top cover assembly provided in an embodiment of this application is shown.

[0022] Figure 2 A cross-sectional view of the top cover assembly provided in an embodiment of this application is shown.

[0023] Figure 3 A cross-sectional view of the pole structure provided in an embodiment of this application is shown.

[0024] Figure 4 This is a cross-sectional view of the pole structure provided in an embodiment of this application.

[0025] Figure 5 It shows Figure 4 The exploded view of the sectional view shown.

[0026] Figure 6 A schematic diagram of the structure of the injection molded part provided in the embodiment of this application is shown.

[0027] Figure 7 A schematic diagram of the structure of the pole body provided in an embodiment of this application is shown.

[0028] Figure 8 A schematic diagram of the structure of the aluminum ring provided in an embodiment of this application is shown.

[0029] Illustration:

[0030] 11. Top cover plate; 12. Pole post body; 121. Aluminum part; 122. Copper part; 21. First anti-rotation positioning hole; 22. First anti-rotation groove; 23. Sloping surface; 13. Aluminum ring; 131. Enclosure cover structure; 31. Second anti-rotation positioning hole; 32. Second anti-rotation groove; 33. Anti-rotation boss; 14. Injection molded part; 15. Insulating part; 16. Lower plastic. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0035] Please see Figures 1 to 8 As shown in the figure, this application provides a top cover assembly and its pole post structure.

[0036] For example, the top cover assembly includes a top cover plate 11, an electrode structure, an insulating component 15, and a lower plastic component 16. The electrode structure includes an electrode body 12, an aluminum ring 13, and an injection molded component 14. For example, during assembly, the electrode body 12 and the aluminum ring 13 are first fixed in place, and then the injection molded component 14 is used to form a single piece. Then, the single piece and the insulating component 15 are placed on the top cover plate 11, and finally, the aluminum ring 13 is welded to the top cover plate 11 for fixation.

[0037] As an example, the pole body 12 can be a one-piece molded part, a composite material part, or a combination of aluminum part 121 and copper part 122 (e.g., brazing), and this application does not specifically limit it in this way.

[0038] In some embodiments of this application, a first anti-rotation groove 22 and a first anti-rotation positioning hole 21 are provided on the periphery of the electrode body 12. A wall cover structure 131 extends upward from the inner edge of the aluminum ring 13, and a second anti-rotation groove 32 and a second anti-rotation positioning hole 31 are provided on the upper surface of the wall cover structure 131. The gap between the electrode body 12 and the aluminum ring 13, the periphery of the electrode body 12, and the upper surface of the wall cover structure 131 are filled with injection molded parts 14.

[0039] The first anti-rotation positioning hole 21 and the second anti-rotation positioning hole 31 are used to prevent rotation and position the injection molded part 14 during filling. For example, the insert pin in the injection mold passes through the first anti-rotation positioning hole 21 and the second anti-rotation positioning hole 31 for positioning. The injection molded part 14 is filled with the first anti-rotation groove 22 and the second anti-rotation groove 32 to prevent mutual rotation between the pole body 12 and the aluminum ring 13 after injection molding.

[0040] As an example, the second anti-rotation positioning hole 31 and the first anti-rotation positioning hole 21 are positioned correspondingly, and the hole size of the second anti-rotation positioning hole 31 is larger than the hole size of the first anti-rotation positioning hole 21.

[0041] The shape of the first anti-rotation positioning hole 21 is not specifically limited in this embodiment. For example, the first anti-rotation positioning hole 21 can be a round hole, a square hole, an elliptical hole, or a hole of other shapes. For example, the first anti-rotation positioning hole 21 can be a complete hole or a semi-circular hole (e.g., Figure 7 (as shown), a semi-elliptical hole, or a hole of other curvatures.

[0042] Similarly, the shape of the second anti-rotation positioning hole 31 is not specifically limited in the embodiments of this application. For example, the second anti-rotation positioning hole 31 can be a round hole, a square hole, an elliptical hole, or a hole of other shapes. For example, the second anti-rotation positioning hole 31 can be a complete hole (e.g., Figure 8 (As shown), it can also be a semi-circular hole, a semi-elliptical hole, or a hole of other curvatures.

[0043] As an example, the first anti-rotation positioning hole 21 is located within the first anti-rotation groove 22 (e.g.) Figure 7 (as shown), or the first anti-rotation positioning hole 21 is not within the first anti-rotation groove 22, this application does not make specific limitations in this regard.

[0044] As an example, the second anti-rotation positioning hole 31 is located within the second anti-rotation groove 32 (e.g. Figure 8 (as shown), or the second anti-rotation positioning hole 31 is not within the second anti-rotation groove 32, this application does not make specific limitations in this regard.

[0045] In some embodiments of this application, the periphery of the pole body 12 is provided with a plurality of spaced-apart first anti-rotation grooves 22 and a plurality of spaced-apart first anti-rotation positioning holes 21, and the upper surface of the wall cover structure 131 is provided with a plurality of spaced-apart second anti-rotation grooves 32 and a plurality of spaced-apart second anti-rotation positioning holes 31. For example, the number of first anti-rotation grooves 22, first anti-rotation positioning holes 21, second anti-rotation grooves 32, and second anti-rotation positioning holes 31 are all four.

[0046] In some embodiments of this application, the periphery of the pole body 12 is provided with a slope surface 23, the injection molded part 14 covers the slope surface 23 of the pole body 12, and the top of the pole body 12 protrudes from the injection molded part 14.

[0047] In some embodiments of this application, the upper surface of the wall cover structure 131 is further provided with an anti-rotation boss 33 with a bevel, and the injection molded part 14 covers the anti-rotation boss 33.

[0048] In some embodiments of this application, a battery is also provided, including the aforementioned terminal structure or the aforementioned top cover assembly. As an example, the battery is a secondary battery, such as a lithium-ion battery.

[0049] In summary, the electrode post structure, top cover assembly, and battery provided in this application embodiment, when filling the injection molding part 14, prevent mutual rotation between the electrode post body 12 and the aluminum ring 13 through the anti-rotation positioning function of the first anti-rotation positioning hole 21 and the second anti-rotation positioning hole 31 (for example, during injection molding, the insert pin passes through the first anti-rotation positioning hole 21 and the second anti-rotation positioning hole 31); after filling the injection molding, the mutual rotation between the electrode post body 12 and the aluminum ring 13 is prevented through the first anti-rotation groove 22 and the second anti-rotation groove 32, thereby improving the assembly accuracy and precision of the top cover assembly.

[0050] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A pole post structure, characterized in that, include: The electrode body has a first anti-rotation groove and a first anti-rotation positioning hole on its periphery; An aluminum ring, wherein the inner edge of the aluminum ring extends upward with a wall cover structure, and the upper surface of the wall cover structure is provided with a second anti-rotation groove and a second anti-rotation positioning hole; The injection molded part is filled with the gap between the pole body and the aluminum ring, the periphery of the pole body, and the upper surface of the wall cover structure. The first anti-rotation positioning hole and the second anti-rotation positioning hole are used to prevent rotation and position the injection molded part during filling, and the injection molded part is filled with the first anti-rotation groove and the second anti-rotation groove.

2. The pole post structure according to claim 1, characterized in that, The second anti-rotation positioning hole corresponds to the first anti-rotation positioning hole, and the size of the second anti-rotation positioning hole is larger than the size of the first anti-rotation positioning hole.

3. The pole post structure according to claim 1, characterized in that, The first anti-rotation positioning hole is located within the first anti-rotation groove, and / or the second anti-rotation positioning hole is located within the second anti-rotation groove.

4. The pole post structure according to claim 1, characterized in that, The periphery of the pole body is provided with a plurality of spaced-apart first anti-rotation grooves and a plurality of spaced-apart first anti-rotation positioning holes, and the upper surface of the wall cover structure is provided with a plurality of spaced-apart second anti-rotation grooves and a plurality of spaced-apart second anti-rotation positioning holes.

5. The pole post structure according to claim 1, characterized in that, The periphery of the pole body is provided with a sloping surface, the injection molded part covers the sloping surface of the pole body, and the top of the pole body protrudes from the injection molded part.

6. The pole post structure according to claim 1, characterized in that, The upper surface of the wall cover structure is also provided with an anti-rotation boss with a bevel, and the injection molded part covers the anti-rotation boss.

7. A top cover assembly, characterized in that, Includes the pole post structure as described in any one of claims 1 to 6.

8. A battery, characterized in that, Includes the pole post structure as described in any one of claims 1 to 6 or the top cover assembly as described in claim 7.

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