Battery cover plate with physical fool-proof mechanism

Abstract

The application provides a battery cover plate with a physical foolproof mechanism, and belongs to the technical field of battery cover plates. The battery cover plate comprises an upper cover plate, a lower insulating piece and two groups of electrode assemblies. Each group of the electrode assemblies comprises a pole, an insulating structure, a connecting block, an insulating sealing piece, an injection molding hole, a foolproof structure and an assembly groove. The battery cover plate with the physical foolproof mechanism is riveted through the penetration hole on the connecting block after the riveting protrusion at the bottom of the pole passes through the penetration hole, and then the riveting area is welded and reinforced. Then, the injection molding body is formed by injection molding in the independent injection molding space formed between the connecting block and the lower insulating piece. The stability and reliability of the overall structure connection and sealing are effectively ensured, and the efficiency of automatic assembly production is improved. In addition, through the cooperation of different characteristic edges and the foolproof structure, the reliability of system identification can be ensured, the increase of part types can be avoided, and the automatic assembly efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of battery cover technology, specifically to a battery cover with a physical anti-foolproof mechanism. Background Technology

[0002] As a key component of the battery sealing and electrode lead-out structure, the battery cover typically includes terminals, insulation structures, sealing structures, and the cover body. Its assembly process is gradually moving towards high-speed automation. To improve the reliable connection between the terminals and the cover, existing technologies generally employ one or more combinations of circumferential continuous connection methods, such as ring welding structures, ring riveting structures, or circumferential injection molding coating structures, to enhance connection strength and sealing reliability.

[0003] However, the aforementioned circumferential continuous connection method requires a high degree of consistency in the overall assembly posture of the components during automated assembly. Even slight deviations can easily lead to uneven stress or molding in the circumferential connection area, affecting the reliability of the connection. Therefore, it usually relies on external high-precision positioning mechanisms for alignment and fixation, which is detrimental to improving the efficiency of automated assembly production. Furthermore, the circumferential injection molding overlay structure typically requires mold closure to form a complete molding space, further limiting the improvement of automated assembly production efficiency.

[0004] Furthermore, existing technologies typically employ differentiated additional features (e.g., identification through protrusions and grooves of different sizes or shapes) or differentiated components (e.g., distinction through poles of different sizes or shapes) to prevent incorrect polarity installation. However, the former is easily affected by the cover plate size; for example, in small cover plates, the size of the differentiated additional features is also relatively small, which is easily limited by machining accuracy, reducing the reliability of system identification. The latter increases the number of parts for drive, leading to increased complexity in material feeding and assembly management. Both approaches, to varying degrees, restrict further improvements in automated assembly productivity. Summary of the Invention

[0005] The present invention provides a battery cover with a physical anti-foolproof mechanism, including an upper cover, a lower insulating component, and two sets of electrode assemblies. Each set of electrode assemblies includes a terminal post, an insulating structure, a connecting block, an insulating seal, an injection hole, an anti-foolproof structure, and an assembly groove. The bottom of the electrode post has a riveting protrusion. The insulating structure covers the outer periphery of the bottom of the electrode post and exposes the riveting protrusion. The connecting block has a through hole. The insulating seal is located between the connecting block and the upper cover plate. The riveting protrusion passes through the through hole and is riveted to fix the electrode post and the connecting block. Welding is performed in the riveting area. Several injection holes are provided on the connecting block. Corresponding mating holes are provided on the lower insulating component. The mating holes and injection holes are mated after the connecting block and the electrode post are fixedly connected to form several independent injection spaces. The connection reinforcement structure is formed by injection molding. Anti-foolproof structures are respectively provided between the electrode post and the insulating structure and between the insulating structure and the upper cover plate. The assembly groove is provided on the upper cover plate and is adapted to the insulating structure. The outer periphery of the bottom of the electrode post, the outer periphery of the insulating structure, and the assembly groove are all non-circular structures. The non-circular structure has at least two types of feature edges. The anti-foolproof structures of the two sets of electrode assemblies are respectively provided on different types of feature edges.

[0006] In one possible implementation, the non-circular structure is a polygonal structure, and the polygonal structure has at least two feature sides of different lengths.

[0007] In one possible implementation, the poles and insulating structure in the same electrode assembly, as well as the foolproof structure between the insulating structure and the top cover, are axially aligned.

[0008] In one possible implementation, the foolproof structure includes a groove and a raised step, the step being adapted to fit the groove.

[0009] In one possible implementation, the injection holes are uniformly distributed along the circumference of the pole post.

[0010] In one possible implementation, the injection-molded body after injection molding in the injection space has a structure that is small in the middle and large at both ends.

[0011] In one possible implementation, both the injection hole and the mating hole are conical structures with their smaller diameter ends facing each other.

[0012] In one possible implementation, the connecting block has an upwardly protruding connecting portion that passes through the lower insulating member and the upper cover plate and abuts against the pole post, with an insulating seal fitted onto the connecting portion.

[0013] The above-described one or more technical solutions in the embodiments of the present invention have the following technical effects: According to the embodiments of the present invention, a battery cover with a physical anti-foolproof mechanism is provided. The terminal post is riveted together with the connecting block by passing a riveting protrusion through a through hole in the connecting block. The riveting area is then reinforced by welding. Next, an injection molded body is formed in the independent injection molding space between the connecting block and the lower insulating component, further improving the stability of the overall structural connection. This ensures the stability and reliability of the overall structural connection and sealing. Furthermore, the aforementioned structure not only facilitates continuous automated assembly production but also effectively reduces the reliance on high-precision positioning mechanisms in the automated assembly process, thereby improving the efficiency of automated assembly production. Secondly, the combination of different feature edges and the anti-foolproof structure ensures the reliability of system recognition while avoiding an increase in the number of parts, further contributing to the improvement of automated assembly efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the terminal post, connecting block and insulating seal of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention;

[0016] Figure 3 This is a partial structural schematic diagram of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention;

[0017] Figure 4 This is a top view of the upper cover of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention.

[0018] Figure 5 This is a bottom view of the left pole of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention.

[0019] Figure 6 This is a bottom view of the right pole of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention.

[0020] Figure 7 This is a top view of the left insulation structure of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention.

[0021] Figure 8 This is a bottom view of the right insulation structure of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention.

[0022] Figure 9This is a top view of the connecting block of a battery cover with a physical anti-foolproof mechanism provided in an embodiment of the present invention.

[0023] In the diagram: 1. Top cover plate; 2. Lower insulation component; 3. Terminal post; 4. Riveting protrusion; 5. Insulation structure; 6. Connecting block; 7. Through hole; 8. Foolproof structure; 81. Groove; 82. Step; 9. Injection hole; 10. Butt hole; 11. Insulating seal; 12. Assembly groove. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Please see Figures 1-9 A battery cover with a physical anti-foolproof mechanism includes an upper cover plate 1, a lower insulating member 2, and two sets of electrode assemblies. The two electrode assemblies are mounted on the upper cover plate 1, facing each other. The left electrode is the positive electrode, and the right electrode is the negative electrode. The lower insulating member 2 is fixedly mounted on the bottom surface of the upper cover plate 1.

[0026] Each electrode assembly includes an electrode post 3, an insulating structure 5, a connecting block 6, and a foolproof structure 8. The bottom outer periphery of the electrode post 3 has an octagonal structure, and a riveting protrusion 4 is provided at the center of the bottom surface (e.g., Figure 5 (As shown). The insulating structure 5 is fitted into the bottom of the pole post 3, and is entirely covered on the outer periphery and part of the bottom surface of the pole post 3, exposing the riveting protrusion 4 at the center of the bottom surface. The outer periphery of the insulating structure 5 has an octagonal structure (as shown). Figure 7 (As shown). The connecting block 6 is located below the lower insulating member 2. The connecting block 6 has a connecting part that protrudes upward in the middle. The connecting part passes through the lower insulating member 2 from bottom to top and abuts against the bottom surface of the upper cover plate 1 and the pole post 3 (as shown). Figure 3 (As shown). A through hole 7 is provided on the connecting part, which is used for the riveting protrusion 4 to pass through, and the through hole 7 and the riveting protrusion 4 cooperate to limit the connection between the connecting block 6 and the pole post 3. After the riveting protrusion 4 passes through the through hole 7, it is riveted to fix the pole post 3 and the connecting block 6. Then the edge of the riveting area is welded to make the pole post 3 and the connecting block 6 firmly connected together.

[0027] See Figure 3An insulating seal 11 is fitted on the protrusion of the connecting block 6. The insulating seal 11 is located between the connecting block 6 and the upper cover plate 1. Before riveting, the connecting block 6 is pressed tightly so that the insulating seal 11 forms a reliable sealing area between the connecting block 6 and the upper cover plate 1.

[0028] See Figure 2 , Figure 3 and Figure 9 To ensure the long-term stability and reliability of the sealing area and the overall connection structure, several injection holes 9 are made on the edge of the connecting block 6, and corresponding mating holes 10 are provided on the lower insulating component 2. After the connecting block 6 is fixedly connected to the pole post 3, its edge is tightly against the lower insulating component 2. The corresponding mating holes 10 and injection holes 9 align to form several injection spaces. The injection-molded body after injection molding of the injection spaces has a structure that is smaller in the middle and larger at both ends, so that the connecting block 6 is firmly fixedly connected to the lower insulating component 2. Combined with the stable connection between the connecting block 6 and the central area of ​​the pole post 3, the long-term stability and reliability of the overall structure can be effectively guaranteed. Figure 3 As shown, both the injection hole 9 and the mating hole 10 are conical structures, with their smaller diameter ends facing each other. During the injection molding process, the injection space can be easily completed by simply pressing the connecting block 6 and the upper cover plate 1 together. Preferably, there are two or four injection holes 9; two for small-sized battery covers and four for large-sized battery covers. The injection holes 9 are evenly distributed along the circumference of the electrode post 3. It should be noted that this invention indirectly enhances the connection strength of the overall structure and the stability and reliability of the sealing performance through the connection between the lower insulating component 2 and the connecting block 6. Since the connection technology between the lower insulating component 2 and the upper cover plate 1 is very mature, it can fully guarantee the stability, reliability, and connection strength of their fixed connection. Therefore, the effect of the above-mentioned indirect enhancement method is stable and reliable.

[0029] See Figures 2-9 The upper cover plate 1 is provided with an assembly groove 12 that fits into the insulating structure 5, such as... Figure 4As shown, the outer periphery of the assembly slot 12 is an octagonal structure, and the structures of the assembly slot 12, the insulating structure 5, and the bottom outer periphery of the pole post 3 are identical, meaning each octagonal structure has four identical long sides and four identical short sides. The long and short sides are alternately connected end-to-end to form the octagonal structure. Anti-misplacement structures 8 are provided between the upper cover plate 1 and the insulating structure 5, and between the insulating structure 5 and the pole post 3. Specifically, the anti-misplacement structure 8 in the left electrode assembly is positioned at the location of the long side, and the anti-misplacement structure 8 in the right electrode assembly is positioned at the location of the short side. This ensures that the pole post 3 and the insulating structure 5 in the two sets of electrode assemblies cannot be interchanged on the upper cover plate 1. During assembly, it is only necessary to identify whether the location of the anti-misplacement structure 8 is a long side or a short side to directly distinguish the positive and negative poles and proceed with assembly. Combined with the physical anti-misplacement mechanism 8, it effectively prevents the positive and negative poles from being installed incorrectly. Compared with existing differentiated additional features and differentiated pole post structures, this effectively improves the reliability of system identification without increasing the variety of parts or the complexity of material supply.

[0030] See Figures 2-8 The foolproof structure 8 includes a groove 81 and a raised step 82, with the step 82 fitting into the groove 81. The groove 81 of the foolproof structure 8 between the electrode post 3 and the insulating structure 5 is located at the bottom edge of the electrode post 3, and the step 82 is located within the insulating structure 5. The groove 81 of the foolproof structure 8 between the insulating structure 5 and the upper cover plate 1 is located at the bottom edge of the insulating structure 5, and the step 82 is located in the assembly groove 12. In the same electrode assembly, the groove 81 and step 82 located on the same side are axially aligned. This facilitates the assembly of the electrode post 3 and the insulating structure 5, as well as the insulating structure 5 and the upper cover plate 1, in the same orientation.

[0031] Battery cover assembly process: 1. First, fix the lower insulating component 2 on the upper cover 1. At the same time, the terminal post 3 can be fitted with the corresponding insulating structure 5 simultaneously. During the fitting process, the terminal post 3 fits with the insulating structure 5 according to the preset posture, so that the step 82 can be inserted into the corresponding groove 81.

[0032] 2. Fit the insulating structure 5 with the pole post 3 into the corresponding mounting groove 12 on the upper cover plate 1. During this process, the insulating structure 5 does not need to change its previous posture. It only needs to be aligned with the mounting groove 12 to complete the fitting. The corresponding step 82 will automatically insert into the corresponding groove 81.

[0033] 3. Insert the connecting block 6 so that the connecting part abuts against the pole post 3. Then, press the connecting block 6, the upper cover plate 1, and the pole post 3 together. Next, rivet the riveting protrusion 4 at the bottom of the pole post 3 that passes through the through hole 7, so that the connecting block 6 and the pole post 3 are fixedly connected together. After that, weld the outer periphery of the riveted area formed after riveting.

[0034] 4. Press the connecting block 6, the lower insulating part 2, and the upper cover plate 1 together, and directly perform injection molding on the injection space.

[0035] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A battery cover with a physical anti-foolproof mechanism, comprising an upper cover, a lower insulating member, and two sets of electrode assemblies, characterized in that, Each group of electrode assemblies includes: The pole has a riveting protrusion at its bottom; An insulating structure is provided, covering the outer periphery of the bottom of the pole post and exposing the riveting protrusions; A connecting block with a through hole; An insulating seal is provided between the connecting block and the upper cover plate; After the riveting protrusion passes through the through hole, it is riveted to fix the pole to the connecting block, and welding is performed in the riveting area; Several injection holes are provided on the connecting block, and corresponding mating holes are provided on the lower insulating component. After the connecting block and the pole are fixedly connected, the mating holes and the injection holes are connected to form several independent injection spaces, and a connection reinforcement structure is formed by injection molding. The foolproof structure is respectively set between the pole and the insulation structure and between the insulation structure and the upper cover plate; The assembly slot is located on the upper cover plate and is compatible with the insulation structure; The outer periphery of the bottom of the electrode post, the outer periphery of the insulating structure, and the assembly groove are all non-circular structures; the non-circular structure has at least two types of feature edges; the anti-foolproof structures of the two sets of electrode assemblies are respectively set on different types of feature edges.

2. A battery cover with a physical anti-foolproof mechanism according to claim 1, characterized in that: The non-circular structure is a polygonal structure, and the polygonal structure has at least two feature sides of different lengths.

3. A battery cover with a physical anti-foolproof mechanism according to claim 1, characterized in that: The electrode posts and insulating structures, as well as the foolproof structure between the insulating structure and the top cover plate, in the same electrode assembly are aligned axially.

4. A battery cover with a physical anti-foolproof mechanism according to any one of claims 1-3, characterized in that: The foolproof structure includes a groove and a raised step, with the step fitting into the groove.

5. A battery cover with a physical anti-foolproof mechanism according to claim 1, characterized in that: The injection holes are evenly distributed along the circumference of the pole post.

6. A battery cover with a physical anti-foolproof mechanism according to claim 1 or 5, characterized in that: The injection-molded body after injection molding has a structure that is small in the middle and large at both ends.

7. A battery cover with a physical anti-foolproof mechanism according to claim 6, characterized in that: Both the injection hole and the docking hole are conical structures, and their smaller diameter ends are connected to each other.

8. A battery cover with a physical anti-foolproof mechanism according to claim 1, characterized in that: The connecting block has an upwardly protruding connecting part, which passes through the lower insulating member and the upper cover plate and abuts against the pole post. An insulating sealing member is fitted onto the connecting part.

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