Battery cover plate

Abstract

The utility model relates to power battery technical field and provide a kind of battery cover plate.The utility model discloses battery cover plate including cover plate body, first plastic piece and second plastic piece being equipped in the both sides of cover plate body and pole post subassembly;Pole post subassembly is equipped in one end of cover plate body, and pole post subassembly includes pole post and connecting block, connecting block is equipped on second plastic piece, pole post is sequentially threaded first plastic piece, cover plate body and the through hole on second plastic piece, and is riveted with connecting block and is connected;Connecting block is equipped with foolproof structure, and foolproof structure is used to identify the assembly surface of connecting block installation on second plastic piece.The utility model battery cover plate, through setting on the foolproof structure of connecting block, can prevent connecting block from being installed reversely when connecting block and second plastic piece are assembled, ensure the correctness of connecting block assembly, so as to ensure the assembly quality of battery cover plate.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a battery cover. Background Technology

[0002] In the manufacturing process of power batteries, the battery cover assembly, as a crucial component, directly impacts the battery's safety and reliability. During the assembly of the battery cover assembly, the front and back sides of the connecting block—that is, the exposed surface of the connecting block and the side connected to the upper plastic component—are structurally extremely similar. This creates a risk of misidentification during machine assembly, where the connecting block is installed incorrectly. If the battery cover is installed with the connecting block reversed, it can easily lead to reduced terminal strength and detachment, posing a battery safety risk and potentially rendering the battery unusable. Utility Model Content

[0003] In view of this, the present invention aims to provide a battery cover plate that can prevent the connecting block from being installed backwards, thereby ensuring the assembly quality of the battery cover plate.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A battery cover includes a cover body, a first plastic part and a second plastic part disposed on both sides of the cover body, and an electrode assembly;

[0006] The pole assembly is located at one end of the cover plate body, and the pole assembly includes a pole and a connecting block. The connecting block is located on the second plastic part. The pole passes through the through holes in the first plastic part, the cover plate body and the second plastic part in sequence, and is riveted to the connecting block.

[0007] The connecting block is provided with a foolproof structure, which is used to identify the mounting surface of the connecting block on the second plastic part.

[0008] Furthermore, the foolproof structure includes a foolproof groove, which is disposed on the side of the connecting block facing the second plastic part.

[0009] Furthermore, corresponding to the anti-mistake groove, the second plastic part is provided with a protrusion, which can be located in the anti-mistake groove.

[0010] Furthermore, a first positioning structure is provided between the first plastic part and the cover plate body; and / or, a second positioning structure is provided between the second plastic part and the cover plate body.

[0011] Furthermore, the first positioning structure includes a first positioning groove on the cover plate body and a first positioning protrusion on the first plastic part, the first positioning protrusion being positioned in the first positioning groove; and / or, the second positioning structure includes a second positioning groove on the cover plate body and a second positioning protrusion on the second plastic part, the second positioning protrusion being positioned in the second positioning groove.

[0012] Furthermore, a limiting structure is provided between the first plastic part and the cover plate body, located at the end of the first plastic part and the cover plate body away from the pole post.

[0013] Furthermore, the limiting structure includes a limiting groove provided on one of the first plastic part and the cover plate body, and a limiting protrusion provided on the other of the first plastic part and the cover plate body; the limiting protrusion can be inserted into the limiting groove.

[0014] Furthermore, in the projection on the cover plate body, both the limiting groove and the limiting protrusion are elongated, and the long axis of both the limiting groove and the limiting protrusion extends along the length direction of the cover plate body.

[0015] Furthermore, the first plastic part has a mounting groove on the side away from the cover plate body; the pole includes a main body with an elliptical ring cross-section and a limiting protrusion connected to one end of the main body, the main body passing through through holes in the first plastic part, the cover plate body and the second plastic part in sequence, and the limiting protrusion is located in the mounting groove.

[0016] Furthermore, the groove wall of the mounting groove is provided with limiting protrusions that are either in contact with or spaced apart from the limiting protrusion; the limiting protrusions are a plurality of those arranged at intervals along the circumference of the limiting protrusion.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] (1) The battery cover plate of this utility model can easily identify the assembly surface of the connecting block installed on the second plastic part by setting a foolproof structure on the connecting block. In this way, when the connecting block and the second plastic part are assembled, the connecting block can be prevented from being installed backwards, ensuring the correctness of the assembly of the connecting block, thereby ensuring the assembly quality of the battery cover plate.

[0019] (2) The anti-mistake structure adopts the anti-mistake groove, which has a simple structure and is easy to set on the connecting block.

[0020] (3) A protrusion corresponding to the anti-fooling groove is provided on the second plastic part so that the protrusion can be located in the anti-fooling groove. In this way, by using the cooperation between the protrusion and the anti-fooling groove, the positioning effect of the connecting block on the second plastic part can be improved to a certain extent, thereby ensuring the reliability of the connection of the connecting block on the second plastic part.

[0021] (4) By setting a first positioning structure between the first plastic part and the cover plate body, and setting a second positioning structure between the second plastic part and the cover plate body, the positioning effect of the first plastic part and the second plastic part on the cover plate body can be improved, and the positional accuracy of the first plastic part and the second plastic part on both sides of the cover plate body can be guaranteed.

[0022] (5) The first positioning structure adopts the positioning fit of the first positioning protrusion and the first positioning groove, and the second positioning structure adopts the positioning fit of the second positioning protrusion and the second positioning groove. The structure is relatively simple and easy to manufacture.

[0023] (6) A limiting structure is set between the first plastic part and the cover plate body, so that the limiting structure is arranged at the end opposite to the pole post. In this way, after the battery cover plate is assembled, the problem of offset relative to the cover plate body due to the long size of the first plastic part can be avoided, thereby ensuring the manufacturing quality of the battery cover plate and thus ensuring the assembly quality of the subsequent battery cover plate and battery casing.

[0024] (7) The limiting structure adopts the insertion and matching of limiting groove and limiting protrusion, which is convenient for processing and preparation.

[0025] (8) The limiting groove and the limiting protrusion are both long strips, so that the long axis of the limiting groove and the limiting protrusion extends along the length direction of the cover plate body. This can increase the contact area between the first plastic part and the cover plate body in the length direction of the cover plate body, which helps to further improve the limiting effect of the first plastic part on the cover plate body.

[0026] (9) The mounting groove provided on the first plastic part can provide mounting space for the limiting protrusion of the pole post, and with the stopping effect of the limiting protrusion, the reliability of the connection between the end of the pole post away from the connecting block and the first plastic part can be guaranteed.

[0027] (10) Multiple limiting protrusions are set on the wall of the mounting groove, and the multiple limiting protrusions are set along the circumferential direction of the limiting protrusion edge. This not only facilitates the assembly of the pole and the first plastic part, but also improves the accuracy of the pole assembly position. At the same time, it can also avoid problems such as the pole shaking after assembly, thus helping to ensure the sealing performance of the battery cover. Attached Figure Description

[0028] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0029] Figure 1 This is an exploded view of the battery cover plate described in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the front structure of the battery cover plate according to an embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the back structure of the battery cover according to an embodiment of the present utility model;

[0032] Figure 4 This is a top view of the battery cover plate described in an embodiment of the present utility model;

[0033] Figure 5 for Figure 3 Enlarged view of section A in the middle;

[0034] Figure 6 for Figure 4 A sectional view from the middle BB direction;

[0035] Figure 7 This is a schematic diagram of the back structure of the connecting block described in an embodiment of the present utility model;

[0036] Figure 8 This is a schematic diagram of the back structure of the upper plastic as described in an embodiment of the present invention;

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Cover plate body; 2. First plastic part; 3. Second plastic part; 4. Terminal post; 5. Connecting block; 6. Sealing element;

[0039] 101. First positioning groove; 102. Limiting groove; 103. Second positioning groove; 201. First positioning protrusion; 202. Limiting protrusion; 203. Mounting groove; 2031. Limiting protrusion; 301. Protrusion; 302. Second positioning protrusion; 401. Main body; 402. Limiting flange; 501. Foolproof groove;

[0040] 10. First via; 20. Second via; 30. Third via; 50. Fixing hole. Detailed Implementation

[0041] To make the technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0043] Furthermore, in the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0045] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0047] An embodiment of the first aspect of this utility model provides a battery cover.

[0048] In existing technologies, during the assembly of battery cover assemblies, the front and back sides of the connecting block—that is, the exposed surface of the connecting block and the side of the connecting block that connects to the upper plastic part—are structurally extremely similar. This poses a risk of identification errors during machine assembly, meaning the connecting block might be installed with the wrong orientation. If the battery cover is installed with the connecting block reversed, it can easily lead to reduced terminal strength and detachment, resulting in battery safety risks and even rendering the battery unusable.

[0049] In view of this, in order to overcome the shortcomings of the prior art, the battery cover in this embodiment incorporates... Figures 1 to 8 In terms of overall design, it includes a cover plate body 1, a first plastic part 2 and a second plastic part 3 located on both sides of the cover plate body 1, and an pole assembly.

[0050] The electrode assembly is located at one end of the cover plate body 1, and includes an electrode 4 and a connecting block 5. The connecting block 5 is located on the second plastic part 3. The electrode 4 passes through through holes in the first plastic part 2, the cover plate body 1, and the second plastic part 3 in sequence, and is riveted to the connecting block 5. Furthermore, the connecting block 5 is provided with a foolproof structure to identify the mounting surface of the connecting block 5 on the second plastic part 3.

[0051] In the above structure, the anti-foolproof structure set on the connecting block 5 makes it easy to identify the mounting surface of the connecting block 5 on the second plastic part 3. This prevents the connecting block 5 from being installed backwards when it is assembled with the second plastic part 3, ensuring the correctness of the assembly position of the connecting block 5 and thus ensuring the assembly quality of the battery cover.

[0052] Based on the above overall introduction, specifically, as an exemplary structural form, the battery cover of this embodiment still refers to... Figures 1 to 8 As shown, it includes a cover plate body 1, a first plastic part 2, a second plastic part 3, a sealing part 6, and an electrode assembly. The first plastic part 2 is located on the lower side of the cover plate body 1 and is usually referred to as the lower plastic part. The second plastic part 3 is located on the upper side of the cover plate body 1 and is usually referred to as the upper plastic part.

[0053] The through holes on the first plastic part 2, the cover plate body 1, and the second plastic part 3 are specifically the second through hole 20 formed on the first plastic part 2, the first through hole 10 formed on the cover plate body 1, and the third through hole 30 formed on the second plastic part 3. A sealing member 6 is fitted onto the terminal post 4, and the sealing member 6 is at least capable of sealing the gap between the cover plate body 1 and the terminal post 4. The terminal post assembly includes the terminal post 4 and the connecting block 5. The terminal post 4 is only one of its kind on the battery cover plate, located at one end closest to the battery cover plate. During assembly, the terminal post 4 passes sequentially through the second through hole 20, the first through hole 10, and the third through hole 30, and is riveted to the fixing hole 50 on the connecting block 5.

[0054] The foolproof structure set on the connecting block 5, combined with Figure 1 , Figure 6 and Figure 7 As shown, in some exemplary embodiments, the foolproof structure includes, for example, a foolproof groove 501, which is provided on the side of the connecting block 5 facing the second plastic part 3. This structure is simple and facilitates its installation on the connecting block 5. Furthermore, for example, corresponding to the foolproof groove 501, the second plastic part 3 has a protrusion 301, which can be located within the foolproof groove 501. In this case, the insertion and engagement of the protrusion 301 with the foolproof groove 501 can improve the positioning effect of the connecting block 5 on the second plastic part 3, thereby ensuring the reliability of the connection of the connecting block 5 on the second plastic part 3.

[0055] For example Figure 2 , Figure 6 and Figure 7 As shown, a foolproof groove 501 is provided on the back of the connecting block 5. Corresponding to the foolproof groove 501, a protrusion 301 is provided on the second plastic part 3. Thus, when the connecting block 5 and the second plastic part 3 are assembled, the protrusion 301 can be inserted into the foolproof groove 501. It can be understood here that, in addition to using the foolproof groove 501, the foolproof structure can also use an outward protrusion provided on the connecting block 5. For example, the outward protrusion can be like the protrusion 301. In this case, a groove can be provided on the second plastic part 3 to accommodate the outward protrusion. This configuration is also acceptable.

[0056] In practical implementation, the shape of the anti-misplacement groove 501 can be, for example, circular, elliptical, rectangular, etc., to facilitate equipment identification. It is understood that, to facilitate the insertion and mating of the protrusion 301 with the anti-misplacement groove 501, the cross-sectional shape of the protrusion 301 should match the shape of the anti-misplacement groove 501. Furthermore, the depth of the anti-misplacement groove 501 can be set, for example, between 0.05-0.5 mm, such as 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm.

[0057] In some exemplary embodiments, the aforementioned anti-misalignment grooves 501 are, for example, two grooves 501 provided on the connecting block 5, the two grooves 501 being symmetrically arranged about the fixing holes 50 on the connecting block 5, and the number of protrusions 301 matching the number of grooves 501. It is understood here that the number of anti-misalignment grooves 501 may be one, three, or other than two, and this embodiment does not limit this.

[0058] Combination Figure 1 , Figure 6 and Figure 8As shown, in some exemplary embodiments, a first positioning structure may be provided between the first plastic part 2 and the cover plate body 1, and a second positioning structure may be provided between the second plastic part 3 and the cover plate body 1. In this way, by utilizing the first and second positioning structures, the positioning effect of the first plastic part 2 and the second plastic part 3 on the cover plate body 1 can be improved, ensuring the positional accuracy of the first plastic part 2 and the second plastic part 3 on both sides of the cover plate body 1.

[0059] Specifically, the first positioning structure, as an example, includes, for example, a first positioning groove 101 on the cover plate body 1 and a first positioning protrusion 201 on the first plastic part 2, with the first positioning protrusion 201 positioned in the first positioning groove 101. The second positioning structure, as an example, includes, for example, a second positioning groove 103 on the cover plate body 1 and a second positioning protrusion 302 on the second plastic part 3, with the second positioning protrusion 302 positioned in the second positioning groove 103. In the above structures, the first positioning structure uses a positioning fit between the first positioning protrusion and the first positioning groove, and the second positioning structure uses a positioning fit between the second positioning protrusion and the second positioning groove. This structural form is relatively simple and easy to manufacture.

[0060] Furthermore, in specific implementation, preferably, the first positioning structure and the second positioning structure are both arranged at intervals around the pole post. The first positioning structure and the second positioning structure are staggered, and their projections on the cover plate body 1 are such that the extension line connecting the two first positioning structures intersects the long side of the cover plate body 1. Figure 2 The dashed line D shown intersects with the long side of the cover plate body 1, and the extension line connecting the two second positioning structures also intersects with the long side of the cover plate body 1. Figure 2 The dashed line E shown intersects with the long side of the cover body 1. This design not only helps to ensure the structural strength of the cover body 1, but also helps to improve the torsional strength of the assembled battery cover.

[0061] It is worth mentioning that, in addition to providing both the first and second positioning structures, it is also possible to provide only the first positioning structure or only the second positioning structure. Furthermore, it is worth noting that both the first positioning groove 101 and the second positioning groove 103 are blind holes, meaning that neither the first positioning groove 101 nor the second positioning groove 103 penetrates the thickness of the cover plate body 1. This ensures the sealing performance of the battery casing after the cover plate body 1 is welded to the casing. Moreover, the number of the first and second positioning structures can be three, four, or other multiples, in addition to the two mentioned above.

[0062] Combination Figure 2 and Figure 6 As shown, in some exemplary embodiments, a limiting structure is provided between the first plastic part 2 and the cover body 1, and the limiting structure is located at the end of the first plastic part 2 and the cover body 1 away from the terminal post 4. That is, the terminal post 4 is located at one end of the battery cover, and the limiting structure is arranged at the other end of the battery cover. By arranging the limiting structure at the end opposite to the terminal post 4, the problem of misalignment relative to the cover body 1 due to the long size of the first plastic part 2 can be avoided after the battery cover is assembled, thereby helping to ensure the manufacturing quality of the battery cover, and thus ensuring the subsequent assembly quality of the battery cover and the battery casing.

[0063] Specifically, the limiting structure includes, for example, a limiting groove 102 provided on one of the first plastic part 2 and the cover plate body 1, and a limiting protrusion 202 provided on the other of the first plastic part 2 and the cover plate body 1. The limiting protrusion 202 can be inserted into the limiting groove 102. The limiting structure adopts the insertion and cooperation of the limiting groove 102 and the limiting protrusion 202, which is convenient for processing and manufacturing, and can also effectively prevent the first plastic part 2 from shifting on the cover plate body 1.

[0064] In specific implementation, for example, a limiting groove 102 is provided on the end of the cover plate body 1 away from the first through hole 10, and a limiting protrusion 202 is provided on the end of the first plastic part 2 away from the second through hole 20. Through the insertion and cooperation of the limiting groove 102 and the limiting protrusion 202, the displacement of the first plastic part 2 on the cover plate body 1 can be well prevented.

[0065] Still refer to Figure 2 As shown in the projection on the cover plate body 1, both the limiting groove 102 and the limiting protrusion 202 are elongated, and their major axes extend along the length of the cover plate body 1. This arrangement increases the contact area between the first plastic part and the cover plate body 1 along its length, thereby further improving the limiting effect of the first plastic part 2 on the cover plate body 1.

[0066] Reference Figure 6 As shown, in some exemplary embodiments, for example, a mounting groove 203 is provided on the side of the first plastic part 2 away from the cover plate body 1. Furthermore, the pole post 4 includes a main body 401 with an elliptical annular cross-section and a limiting flange 402 connected to one end of the main body 401. The main body 401 passes sequentially through through holes in the first plastic part 2, the cover plate body 1, and the second plastic part 3; that is, the main body 401 passes sequentially through the second through hole 20, the first through hole 10, and the third through hole 30, and is riveted to the fixing hole 50 on the connecting block 5. The limiting flange 402 is located in the mounting groove 203.

[0067] In specific implementation, the aforementioned sealing element 6 is sleeved on the main body 401, and the sealing element 6 can seal the gaps between the first plastic part 2 and the main body 401, between the cover plate body 1 and the main body 401, and between the second plastic part 3 and the main body 401, thereby improving the sealing performance of the battery cover and preventing the electrolyte inside the battery from leaking from the terminal post 4 installation position.

[0068] In the above structure, the main body 401 with an elliptical ring cross-section can increase the connection area between the pole post 4 and the connecting block 5, improve the connection reliability between the pole post 4 and the connecting block 5, and provide installation space for the limiting protrusion 402 of the pole post 4 through the mounting groove 203 provided on the first plastic part 2. At the same time, with the stopping effect of the limiting protrusion 402, the reliability of the connection between the end of the pole post 4 away from the connecting block 5 and the first plastic part 2 can be guaranteed.

[0069] Combination Figure 3 and Figure 5 As shown, in some exemplary embodiments, for example, a limiting protrusion 2031 is provided on the wall of the mounting groove 203 to fit against or be spaced apart from the limiting protrusion 402, and multiple limiting protrusions 2031 are arranged at intervals along the circumference of the limiting protrusion 402. In this case, the multiple limiting protrusions 2031 arranged circumferentially along the limiting protrusion 402 not only facilitate the assembly of the terminal post 4 and the first plastic part 2, but also improve the accuracy of the assembly position of the terminal post 4, and avoid problems such as shaking of the terminal post 4 after assembly, thereby helping to ensure the sealing performance of the battery cover.

[0070] It is worth noting that, regarding the battery cover of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still made by... Figures 1 to 8 As shown, it includes, for example, a cover plate body 1, a first plastic part 2, a second plastic part 3, a sealing member 6, and an electrode assembly. The electrode assembly is disposed at one end of the cover plate body 1, and the electrode assembly includes an electrode 4 and a connecting block 5.

[0071] The connecting block 5 is provided with a foolproof structure, which is used to identify the mounting surface of the connecting block 5 on the second plastic part 3. This mounting surface is, for example, the bottom surface of the connecting block 5 facing the second plastic part 3. Positioning structures are provided between the first plastic part 2 and the cover plate body 1, and between the second plastic part 3 and the cover plate body 1. A limiting structure is also provided between the first plastic part 2 and the cover plate body 1. Simultaneously, a mounting groove 203 is provided on the side of the first plastic part 2 away from the cover plate body 1. The pole post 4 includes a main body 401 with an elliptical ring-shaped cross-section, and a limiting flange 402 connected to one end of the main body 401. The main body 401 passes through the first plastic part 2, the cover plate body 1, and the second plastic part 3 and is riveted to the connecting block 5. The limiting flange 402 is located in the mounting groove 203.

[0072] The anti-mistake structure includes an anti-mistake groove 501 on the side of the connecting block 5 opposite to the second plastic part 3. Corresponding to the anti-mistake groove 501, the second plastic part 3 is provided with a protrusion 301 that can be located in the anti-mistake groove 501.

[0073] The positioning structure includes a positioning hole 101 penetrating the cover plate body 1, a first positioning protrusion 201 on the first plastic part 2, and a second positioning protrusion 302 on the second plastic part 3. The first positioning protrusion 201 and the second positioning protrusion 302 can be inserted into the positioning hole 101 from both ends. Preferably, the positioning structure consists of two positions spaced apart around the pole post 4. The extension line connecting the two positioning structures intersects the long side of the cover plate body 1 in the projection onto the cover plate body 1.

[0074] The limiting structure includes a limiting groove 102 on the cover plate body 1 and a limiting protrusion 202 on the first plastic part 2, the limiting protrusion 202 being able to be inserted into the limiting groove 102. Furthermore, in the projection on the cover plate body 1, both the limiting groove 102 and the limiting protrusion 202 are elongated strips, and the long axis of both the limiting groove 102 and the limiting protrusion 202 extends along the length direction of the cover plate body 1.

[0075] In the structure of the first plastic part 2, the groove wall of the mounting groove 203 is provided with limiting protrusions 2031 that are in contact with or spaced apart from the limiting protrusion 402. The limiting protrusions 2031 are arranged in multiple circumferentially along the limiting protrusion 402. When the pole post 4 is assembled, the multiple limiting protrusions 2031 can better limit the circumferential position of the pole post 4, thereby improving the accuracy of the assembly position of the pole post 4 and preventing the pole post 4 from shaking after assembly.

[0076] In the preferred embodiment of the battery cover above, the specific settings and arrangements of the anti-foolproof structure, positioning structure, and limiting structure can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the anti-foolproof structure, positioning structure, and limiting structure can also be referred to the descriptions in the above exemplary embodiments.

[0077] The battery cover plate of this embodiment adopts the above design. Through the set foolproof structure, the connecting block 5 can be prevented from being installed backwards during assembly with the second plastic part 3, ensuring the correct assembly of the connecting block 5 and the assembly quality of the battery cover plate. Furthermore, the set positioning structure improves the positioning effect of the first plastic part 2 and the second plastic part 3 on the cover plate body 1, ensuring the positional accuracy of the first plastic part 2 and the second plastic part 3 on both sides of the cover plate body 1. Moreover, during battery cover plate assembly, the set limiting structure avoids the problem of offset relative to the cover plate body 1 due to the long size of the first plastic part 2, thereby helping to ensure the manufacturing quality of the battery cover plate and, consequently, the assembly quality of the battery cover plate and the battery casing.

[0078] The above descriptions are merely some embodiments of this utility model and are not intended to limit the utility model. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery cover, characterized in that: It includes a cover plate body, a first plastic part and a second plastic part disposed on both sides of the cover plate body, and an electrode assembly; The pole assembly is located at one end of the cover plate body, and the pole assembly includes a pole and a connecting block. The connecting block is located on the second plastic part. The pole passes through the through holes in the first plastic part, the cover plate body and the second plastic part in sequence, and is riveted to the connecting block. The connecting block is provided with a foolproof structure, which is used to identify the mounting surface of the connecting block on the second plastic part.

2. The battery cover according to claim 1, characterized in that: The foolproof structure includes a foolproof groove, which is located on the side of the connecting block facing the second plastic part.

3. The battery cover according to claim 2, characterized in that: Corresponding to the anti-mistake groove, the second plastic part is provided with a protrusion, which can be located in the anti-mistake groove.

4. The battery cover according to claim 1, characterized in that: A first positioning structure is provided between the first plastic part and the cover plate body; and / or, A second positioning structure is provided between the second plastic part and the cover plate body.

5. The battery cover according to claim 4, characterized in that: The first positioning structure includes a first positioning groove on the cover plate body and a first positioning protrusion on the first plastic part, the first positioning protrusion being positioned in the first positioning groove; and / or, The second positioning structure includes a second positioning groove on the cover plate body and a second positioning protrusion on the second plastic part, wherein the second positioning protrusion is positioned in the second positioning groove.

6. The battery cover according to claim 1, characterized in that: A limiting structure is provided between the first plastic part and the cover plate body; The limiting structure is located at the end of the first plastic part and the cover plate body that is away from the pole post.

7. The battery cover according to claim 6, characterized in that: The limiting structure includes a limiting groove provided on one of the first plastic part and the cover plate body, and a limiting protrusion provided on the other of the first plastic part and the cover plate body; The limiting protrusion can be inserted into the limiting groove.

8. The battery cover according to claim 7, characterized in that: Projected onto the cover plate body, both the limiting groove and the limiting protrusion are elongated strips, and the long axis of both the limiting groove and the limiting protrusion extends along the length direction of the cover plate body.

9. The battery cover according to any one of claims 1 to 8, characterized in that: The first plastic part has a mounting groove on the side away from the cover plate body; The pole post includes a main body with an elliptical ring cross-section and a limiting protrusion connected to one end of the main body. The main body passes through through holes in the first plastic part, the cover plate body and the second plastic part in sequence, and the limiting protrusion is located in the mounting groove.

10. The battery cover according to claim 9, characterized in that: The groove wall of the mounting groove is provided with a limiting protrusion that is either in contact with or spaced from the limiting protrusion. The limiting protrusions are a plurality of those arranged at circumferential intervals along the limiting protrusion edge.

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