Battery cover plate structure and battery

Abstract

The utility model relates to a battery cover plate structure and a battery, and belongs to the technical field of lithium batteries. The battery cover plate structure provided by the embodiment of the utility model comprises a cover plate, a pole and a connecting piece, the cover plate is provided with a mounting part and a limiting part, the limiting part is arranged above the mounting part, the pole is arranged in the mounting part, at least part of the pole abuts against the limiting part, and the pole is fixed in the mounting part through the limiting part. The connecting piece is arranged on one side, far away from the limiting part, of the cover plate and is connected with the post terminal. According to the battery cover plate structure provided by the invention, the limiting part is arranged on the cover plate, and the fixing effect of the mounting part is realized through the limiting part, so that the mounting and production of the mounting part are not needed, the mounting procedures of the battery cover plate structure are reduced, and the production efficiency of the battery cover plate structure is improved.

Description

Technical Field

[0001] This application relates to the field of lithium battery technology, and in particular to a battery cover structure and a battery. Background Technology

[0002] Among the core components of new energy vehicles, lithium batteries play a crucial role. As the power source, they directly determine key indicators such as the driving range, lifespan, and safety performance of new energy vehicles. The battery cover structure is an important part of the battery assembly, mainly used to encapsulate and protect the internal components of the battery (such as cells and electrolytes), while also providing electrical connections, safety protection, and heat dissipation functions.

[0003] The existing lithium battery cover structure includes a terminal post, a mounting component, and a cover plate. The mounting component is installed in the mounting groove of the cover plate, and the terminal post is installed on the mounting component, which fixes the terminal post and isolates it from the cover plate.

[0004] Because the mounting components are independent parts, they need to be customized and assembled on the production line. This process not only increases the complexity of the production process but also leads to low production efficiency, making it difficult to meet the needs of large-scale production. Utility Model Content

[0005] This application provides a battery cover structure. By adjusting the cover structure and replacing the mounting parts with limiting parts, the installation steps are reduced and the production efficiency is improved.

[0006] In a first aspect, this application provides a battery cover structure, including a cover plate, a terminal post, and a connecting piece. The cover plate is provided with a mounting portion and a limiting portion. The limiting portion is disposed above the mounting portion. The terminal post is disposed within the mounting portion, and at least a portion of the terminal post abuts against the limiting portion. The limiting portion fixes the terminal post within the mounting portion. The connecting piece is disposed on the side of the cover plate away from the limiting portion and is connected to the terminal post.

[0007] In this embodiment of the application, the pole post includes a first column body, the first column body is provided with a protrusion, and the mounting part includes a mounting groove;

[0008] The first column is disposed in the mounting groove, and the protrusion is used to abut against the limiting part.

[0009] In this embodiment of the application, the pole post further includes a second pole post connected to the first pole post, and the mounting part further includes a mounting hole communicating with the mounting groove;

[0010] The second column passes through the mounting hole and connects to the connecting piece.

[0011] In the embodiment of the present application, the first isolation piece is wrapped outside the limiting portion, and the limiting portion abuts against the protruding portion through the first isolation piece.

[0012] In the embodiment of the present application, the sealing piece is further included.

[0013] The sealing piece is arranged between the protruding portion and the mounting groove, and the sealing piece abuts against the first isolation piece.

[0014] In the embodiment of the present application, the second isolation piece is further included, and the second isolation piece includes a first isolation portion and a second isolation portion connected with the first isolation portion.

[0015] The first isolation portion is arranged between the cover plate and the connecting piece, and the second isolation portion is arranged between the mounting hole and the second column body.

[0016] In the embodiment of the present application, a chamfer is arranged on the protruding portion, and the chamfer is located on a side of the protruding portion close to the limiting portion.

[0017] In the embodiment of the present application, the limiting portion has an L-shaped cross section.

[0018] In the embodiment of the present application, the first isolation piece and the second isolation piece are both plastic pieces.

[0019] In a second aspect, the present application further provides a battery including a shell and the battery cover plate structure as described in the first aspect arranged on the shell.

[0020] The battery cover plate structure provided in the embodiment of the present application includes a cover plate, a pole and a connecting piece. The cover plate is provided with a mounting portion and a limiting portion. The limiting portion is arranged above the mounting portion. The pole is arranged in the mounting portion. At least part of the pole abuts against the limiting portion. The pole is fixed in the mounting portion through the limiting portion. The connecting piece is arranged on a side of the cover plate away from the limiting portion. The connecting piece is connected with the pole. The battery cover plate structure provided in the present application realizes the fixing effect of the mounting piece through the limiting portion arranged on the cover plate. The mounting and production of the mounting piece are not needed. The mounting process of the battery cover plate structure is reduced. The production efficiency of the battery cover plate structure is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the present application.

[0022] Figure 1 FIG. 1 is a schematic view of a cover plate structure in the prior art;

[0023] Figure 2 FIG. 1 is a schematic view of a cover plate structure in the prior art;

[0024] Figure 3 A sectional view of the battery cover plate structure provided in the present application is shown in the following figure;

[0025] Figure 4 For Figure 3 An enlarged view of A in the middle.

[0026] Reference signs:

[0027] 10 - mounting member;

[0028] 100 - cover plate; 110 - mounting portion; 111 - mounting groove; 112 - mounting hole; 120 - limiting portion;

[0029] 200 - pole; 210 - first column; 211 - protruding portion; 220 - second column;

[0030] 300 - connecting piece;

[0031] 400 - first spacer;

[0032] 500 - sealing member;

[0033] 600 - second spacer; 610 - first spacer portion; 620 - second spacer portion.

[0034] The specific embodiments of the present application have been shown in the above figures, and will be described in more detail hereinafter. These figures and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely in the following by referring to the figures in the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0036] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. In embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0037] The performance and reliability of lithium batteries largely depend on the design and manufacturing quality of their internal components. Among them, the battery cover structure, as an important part of the battery assembly, undertakes the key task of encapsulating and protecting the internal components of the battery (such as cells and electrolytes), while also providing functions such as electrical connection, safety protection and heat dissipation.

[0038] like Figure 1 As shown, Figure 1 This is a schematic diagram of a cover plate structure in the prior art. Existing lithium battery cover plate structures typically include terminals, mounting components, and a cover plate. The mounting component is installed as a separate part within a mounting groove in the cover plate, while the terminals are mounted on the mounting component. While this design achieves both terminal fixation and isolation from the cover plate, it also introduces numerous production problems.

[0039] First, as independent components, mounting parts require customization and assembly on the production line, which not only increases the complexity of the production process but also leads to low production efficiency. Second, due to the independence and customization requirements of mounting parts, the flexibility and adaptability of the production line are limited, making it difficult to meet the needs of large-scale production. Furthermore, the assembly precision and quality control of mounting parts have become challenges in the production process, further affecting the overall performance and reliability of the battery.

[0040] Therefore, how to simplify the production process of lithium battery cover structure, improve production efficiency, and at the same time ensure the performance and reliability of the battery has become an urgent technical problem to be solved in the current lithium battery manufacturing field.

[0041] This patent aims to propose a novel lithium battery cover structure design. By optimizing the integrated design of the mounting components and the cover, the number of independent parts is reduced, the assembly process is simplified, thereby improving production efficiency, reducing production costs, and ensuring the high performance and reliability of the battery. The following will further describe this embodiment with reference to the accompanying drawings.

[0042] in,Figure 2 A top view of the battery cover plate structure provided in the present application is shown in the following figure, Figure 3 A sectional view of the battery cover plate structure provided in the present application is shown in the following figure, Figure 4 As Figure 3 An enlarged view of position A in the above figure.

[0043] As Figures 2-4 shown, the battery cover plate structure provided in the present application includes a cover plate 100, a pole 200, and a connecting piece 300. The cover plate 100 is provided with a mounting portion 110 and a limiting portion 120, the limiting portion 120 is arranged above the mounting portion 110, the pole 200 is arranged in the mounting portion 110, at least part of the pole 200 abuts against the limiting portion 120, the pole 200 is fixed in the mounting portion 110 by the limiting portion 120, the connecting piece 300 is arranged on the side of the cover plate 100 away from the limiting portion 120, and the connecting piece 300 is connected with the pole 200.

[0044] The battery cover plate structure provided in the present application integrates the limiting portion 120 with the cover plate 100, replaces the mounting member with the limiting portion, simplifies the independent assembly process of the mounting member 10, reduces the production process, and improves the production efficiency.

[0045] Among them, the cover plate 100 is the main part of the battery cover plate structure, and its material can be aluminum alloy or other materials with good thermal conductivity and mechanical strength. The mounting portion 110 of the cover plate 100 is a recessed structure for accommodating the pole 200. The shape and size of the mounting portion 110 are matched with the pole 200 to ensure that the pole 200 can be stably installed on the cover plate 100. The limiting portion 120 is part of the cover plate 100, located above the mounting portion 110, used to limit the axial movement of the pole 200, and prevent the pole 200 from loosening or falling off in the mounting portion 110.

[0046] Among them, the pole 200 is a conductive component in the battery cover plate structure, and its material can be copper or copper alloy with good electrical conductivity. The shape of the pole 200 is cylindrical or rectangular, and the specific shape can be designed according to actual needs. The pole 200 is installed in the mounting portion 110, and its lower end contacts the connecting piece 300 and its upper end abuts against the limiting portion 120. Through the limiting action of the limiting portion 120, the pole 200 is firmly fixed in the mounting portion 110, avoiding displacement or loosening of the pole 200 under vibration or impact.

[0047] Among them, the connecting piece 300 is an electrical connection component in the battery cover plate structure, and its material can be nickel or nickel alloy with good electrical conductivity. The connecting piece 300 is arranged on the side of the cover plate 100 away from the limiting portion 120 and connected with the cover plate 100 by welding or other connection methods. The other end of the connecting piece 300 can be connected with other components (such as battery cells) inside the battery to realize electrical conduction of the battery.

[0048] The battery cover plate structure provided in the application ensures the stable installation of the pole 200 through the limiting effect of the limiting portion 120, and improves the reliability and safety of the battery.

[0049] In the embodiment of the application, the pole 200 comprises a first pole body 210, and the first pole body 210 is provided with a protruding portion 211; and the mounting portion 110 comprises a mounting groove 111.

[0050] The first pole body 210 is arranged in the mounting groove 111, and the protruding portion 211 is used to abut against the limiting portion 120.

[0051] The protruding portion 211 is an annular protrusion arranged around the circumference of the first pole body 210, and when the pole 200 is installed in the mounting groove 111, the protruding portion 211 abuts against the limiting portion 120, and the pole 200 is fixed in the mounting portion 110 through the cooperation between the limiting portion 120 and the protruding portion 211, so as to prevent the pole 200 from loosening or displacing during use.

[0052] Through the limiting effect of the limiting portion 120, the pole 200 is firmly fixed in the mounting groove 111, and displacement or loosening of the pole 200 under vibration or impact is avoided.

[0053] The limiting portion 120 is integrally formed with the cover plate 100, and the limiting portion 120 is an annular structure.

[0054] In the embodiment of the application, the pole 200 further comprises a second pole body 220 connected with the first pole body 210, and the mounting portion 110 further comprises a mounting hole 112 in communication with the mounting groove 111;

[0055] The second pole body 220 passes through the mounting hole 112 and is connected with the connecting sheet 300.

[0056] The diameter of the second pole body 220 is smaller than the diameter of the first pole body 210, and when the first pole body 210 is installed in the mounting groove 111, the second pole body 220 passes through the mounting hole 112 and is connected with the connecting sheet 300.

[0057] The connecting sheet 300 is provided with other components for conducting electricity.

[0058] In the embodiment of the application, a first isolation member 400 is further included, the first isolation member 400 is wrapped outside the limiting portion 120, and the limiting portion 120 abuts against the protruding portion 211 through the first isolation member 400.

[0059] The first isolation member 400 is made of a material with good insulation performance (such as rubber or plastic), and is wrapped outside the limiting portion 120, so that the limiting portion 120 abuts against the protruding portion 211 through the first isolation member 400, and plays an insulation and buffering role.

[0060] In the embodiment of the present application, a sealing member 500 is arranged between the protruding portion 211 and the mounting groove 111, and the sealing member 500 abuts against the first isolation member 400.

[0061] The sealing member 500 is made of a rubber material resistant to electrolyte corrosion, and the sealing member 500 prevents leakage of electrolyte in the battery and prevents external liquid from entering the battery, and further enhances the stability of the mounting of the pole 200 by arranging the sealing member 500.

[0062] The sealing member 500 is a sealing ring or a sealing sheet, and the cross-sectional shape of the sealing member 500 is L-shaped.

[0063] In the embodiment of the present application, a second isolation member 600 is further included, and the second isolation member 600 includes a first isolation portion 610 and a second isolation portion 620 connected to the first isolation portion 610.

[0064] The first isolation portion 610 is arranged between the cover plate 100 and the connecting sheet 300, and the second isolation portion 620 is arranged between the mounting hole 112 and the second pole 220.

[0065] The second isolation member 600 is made of a plastic material with excellent insulation performance and chemical corrosion resistance, and includes the first isolation portion 610 and the second isolation portion 620 connected to each other.

[0066] The first isolation portion 610 is arranged between the cover plate 100 and the connecting sheet 300, which can effectively prevent the connecting sheet 300 from directly contacting the cover plate 100, prevent short circuit caused by accidental conduction, and enhance the safety of the battery.

[0067] The second isolation portion 620 is arranged between the mounting hole 112 and the second pole 220, which not only has an insulation effect, but also further seals the gap between the mounting hole 112 and the second pole 220, prevents leakage of electrolyte, and assists in fixing the second pole 220 to reduce shaking.

[0068] For example, the second isolation member 600 further includes a third isolation portion arranged outside the second isolation portion 620, and the third isolation portion is used to prevent the connecting sheet 300 from contacting the external shell.

[0069] The second isolation member 600 added in the embodiment improves the insulation and sealing protection system of the battery cover plate structure, and improves the safety and stability of the battery.

[0070] In the embodiment of the present application, a chamfer is arranged on the protruding portion 211, and the chamfer is located on the side of the protruding portion 211 close to the limiting portion 120.

[0071] The chamfer design of the limiting portion 120 avoids the risk of the protruding portion 211 contacting the limiting portion 120, and at the same time, the limiting portion 120 has more sufficient bending space, which reduces the manufacturing difficulty of the limiting portion 120. Moreover, the damage risk of the first isolation piece 400 and the sealing piece 500 during installation is reduced, and the installation efficiency and product yield are improved.

[0072] In the embodiment of the present application, the cross-sectional shape of the limiting portion 120 is L-shaped.

[0073] The limiting portion 120 is bent towards the pole column 200, and the end close to the pole column 200 after bending is parallel to the horizontal plane of the cover plate 100.

[0074] The L-shaped design of the limiting portion 120 can provide the protruding portion 211 of the pole column 200 with a larger contact area and more uniform pressure, thereby more effectively preventing the pole column 200 from loosening or displacing during use, improving the stability and reliability of the battery. The chamfer design of the protruding portion 211 cooperates with the L-shaped limiting portion 120, so that the pole column 200 is easier to align and insert during installation, reducing the installation difficulty and time, and improving the production efficiency.

[0075] In the embodiment of the present application, the first isolation piece 400 and the second isolation piece 600 are both plastic pieces.

[0076] The first isolation piece 400 and the second isolation piece 600 made of plastic material have good insulation properties, which can effectively prevent the pole column 200 from electrically contacting the cover plate 100 and the connecting piece 300, reduce the risk of short circuit, and improve the safety of the battery. Moreover, the plastic material has good resistance to the electrolyte inside the battery, which can avoid damage to the isolation piece caused by corrosion and prolong the service life of the battery.

[0077] The installation process of the present application: the sealing piece 500, the pole column 200 and the second isolation piece 600 are pre-installed on the cover plate 100 in the corresponding position by riveting, and then the first isolation piece 400 is formed by in-mold injection molding process, so that the first isolation piece 400 is wrapped outside the limiting portion 120. After fixing the pole column 200, other components are installed, thereby realizing the assembly of the battery.

[0078] The embodiment of the present application simplifies the production process of the structural part, reduces the production of the mounting part 10, reduces the cost, and improves the production yield.

[0079] In a second aspect, the present application also provides a battery comprising a shell and a battery cover plate structure as above arranged on the shell.

[0080] It should be noted that a reference to "one embodiment," "an embodiment," "example embodiment," "some embodiments," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0081] In general, terminology can be understood at least in part from usage in context. For example, terms, such as "one or more" as used herein, can be understood as in some embodiments including at least one, or in some embodiments including at least one, but not including more than one; or, at least in part, from a patent or non-patent context in which the phrase is used. Similarly, a term, such as "a" or "said," as used herein, can be understood as in some embodiments, "one" and in other embodiments, "more than one." Additionally, as used in the specification and the claims, the singular form of "a," "an," and "the" include plural references unless the context clearly dictates otherwise.

[0082] As will be readily appreciated by those skilled in the art, "on," "above," and "upper" in the present disclosure are to be interpreted as meaning "directly on" only in the most restrictive sense, but also including the meaning of "on" with intervening features or layers therebetween, and "above" or "upper" including the meaning of "above" or "upper" without intervening features or layers therebetween (i.e., directly on).

[0083] Furthermore, spatially relative terms, such as "beneath," "below," "lower," "above," "upper," and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0084] Finally, it should be noted that the above-described embodiments are merely exemplary of the application of the present application and should not be used in a manner to limit the scope of the application. Those skilled in the art will be able to effect changes and modifications to the embodiments described without departing from the scope of the application. It is therefore desired that the embodiments described herein be considered in a descriptive sense only and not for purposes of limitation. Therefore, the scope of the application is indicated by the following claims.

Claims

1. A battery cover structure, characterized in that, include, A cover plate (100) is provided with a mounting part (110) and a limiting part (120), the limiting part (120) being disposed above the mounting part (110); A pole post (200) is disposed in the mounting portion (110), at least a portion of the pole post (200) abuts against the limiting portion (120), and the limiting portion (120) fixes the pole post (200) in the mounting portion (110); A connecting piece (300) is disposed on the side of the cover plate (100) away from the limiting part (120), and the connecting piece (300) is connected to the pole post (200).

2. The battery cover structure according to claim 1, characterized in that, The pole post (200) includes a first post (210) with a protrusion (211) on the first post (210) and the mounting part (110) includes a mounting groove (111). The first column (210) is disposed in the mounting groove (111), and the protrusion (211) is used to abut against the limiting part (120).

3. The battery cover structure according to claim 2, characterized in that, The pole post (200) also includes a second pole post (220) connected to the first pole post (210), and the mounting part (110) also includes a mounting hole (112) communicating with the mounting groove (111). The second column (220) passes through the mounting hole (112) and connects to the connecting piece (300).

4. The battery cover structure according to claim 3, characterized in that, It also includes a first isolation member (400) which wraps around the outside of the limiting portion (120) and the limiting portion (120) abuts against the protrusion (211) through the first isolation member (400).

5. The battery cover structure according to claim 4, characterized in that, It also includes a seal (500); The seal (500) is disposed between the protrusion (211) and the mounting groove (111), and the seal (500) abuts against the first isolation member (400).

6. The battery cover structure according to claim 5, characterized in that, It also includes a second isolation member (600), which includes a first isolation portion (610) and a second isolation portion (620) connected to the first isolation portion (610). The first isolation part (610) is disposed between the cover plate (100) and the connecting piece (300), and the second isolation part (620) is disposed between the mounting hole (112) and the second column (220).

7. The battery cover structure according to any one of claims 2-6, characterized in that, The protrusion (211) is provided with a chamfer, which is located on the side of the protrusion (211) near the limiting part (120).

8. The battery cover structure according to any one of claims 1-6, characterized in that, The cross-sectional shape of the limiting part (120) is L-shaped.

9. The battery cover structure according to claim 6, characterized in that, Both the first isolation component (400) and the second isolation component (600) are plastic parts.

10. A battery, characterized in that, It includes a housing and a battery cover structure as described in any one of claims 1-9 disposed on the housing.

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