Battery cover plate assembly and battery

Abstract

The utility model provides a battery cover plate assembly and a battery, and relates to the field of batteries, the battery cover plate assembly comprises a cover plate body, and the cover plate body is provided with a mounting hole; the electric conductor comprises an adapter piece and a pole integrally and fixedly arranged on the surface of the adapter piece, the pole penetrates through the mounting hole and extends out of the top surface of the cover plate body, and the adapter piece is located on the bottom surface of the cover plate body; and the insulating part comprises a first part and a second part, the first part is fixedly arranged between the bottom surface of the cover plate body and the switching piece, the second part is fixedly positioned between the outer side wall of the pole and the inner side wall of the mounting hole, and the second part and the first part are integrally and fixedly connected. The battery cover plate assembly disclosed by the utility model has the advantages that the number of parts is small, the structure is simple, the assembly process is simplified, and meanwhile, the pole and the switching piece are integrally arranged, so that the contact internal resistance of connection among the rivet, the pole and the switching piece is reduced, the current only flows through the switching piece and the pole, the internal resistance of the battery is greatly reduced, and the use safety of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover plate assembly and a battery. Background Art

[0002] The existing battery cover plate assembly includes structures such as a transfer piece, an upper plastic, a lower plastic, a rivet, a pole column and a sealing ring. The battery cover plate assembly has many components and complex assembly processes, resulting in low assembly efficiency and high assembly cost of the battery cover plate assembly. In addition, the series-parallel connection between the battery tab and the external circuit needs to pass through a connecting piece, a rivet and a pole column, and electrical connection is required between multiple components, resulting in a large battery resistance, abnormal heating of the battery during use, reduction of battery performance, and even safety accidents. Summary of the Utility Model

[0003] In view of this, the utility model provides a battery cover plate assembly and a battery to solve the problems of complex structure and large internal resistance of the existing battery cover plate assembly.

[0004] The technical solution of the utility model is realized as follows:

[0005] On the one hand, the utility model provides a battery cover plate assembly, including:

[0006] A cover plate body with mounting holes on the cover plate body;

[0007] A conductor, including a transfer piece and a pole column integrally and fixedly arranged on the surface of the transfer piece. The pole column passes through the mounting hole and extends out of the top surface of the cover plate body, and the transfer piece is located at the bottom surface of the cover plate body;

[0008] An insulating part, including a first part and a second part. The first part is fixedly arranged between the bottom surface of the cover plate body and the transfer piece, and the second part is fixedly located between the outer side wall of the pole column and the inner side wall of the mounting hole, and the second part is integrally and fixedly connected with the first part.

[0009] On the basis of the above technical solution, preferably, the transfer piece is of a square structure, and the center of the pole column coincides with the center of the transfer piece.

[0010] Further, preferably, a cavity is arranged at the central axis inside the pole column to form a hollow shell structure of the pole column, and the cavity penetrates through the transfer piece.

[0011] Furthermore, preferably, at least one side of the transfer piece along the length direction of the cover plate body is provided with an extension part for connecting with the tab.

[0012] On the basis of the above technical solution, preferably, a limiting ring is provided on the outer peripheral wall of one end of the pole column extending out of the top surface of the cover plate body. The insulating member further includes a third part, and the third part is arranged between the limiting ring and the top surface of the cover plate body, and the third part is integrally and fixedly connected to the second part.

[0013] Furthermore, preferably, the insulating member further includes a fourth part, and the fourth part is wrapped around the outer surface of the limiting ring and is integrally and fixedly connected to the third part.

[0014] On the basis of the above technical solution, preferably, the distance between the limiting ring and the adapter plate is greater than the thickness of the cover plate body. The outer diameter of the pole column is smaller than the diameter of the mounting hole. The cover plate body, the conductor and the insulating member are integrally injection-molded.

[0015] On the other hand, the present invention also discloses a battery, including the battery cover plate assembly described in the first aspect.

[0016] The present invention has the following beneficial effects compared with the prior art:

[0017] (1) In the battery cover plate assembly disclosed by the present invention, by forming the pole column and the adapter plate into a whole, during assembly, the conductor, the cover plate body and the insulating member are directly integrally injection-molded, reducing the use of rivets. The number of components of the entire battery cover plate assembly is small, the structure is simple, and the assembly process is simplified. At the same time, the pole column and the adapter plate are integrally arranged, reducing the contact internal resistance between the rivet and the pole column and the adapter plate, so that the current only flows through the adapter plate and the pole column, greatly reducing the battery internal resistance and improving the safety of battery use.

[0018] (2) By setting the pole column as a hollow structure, the overall weight of the battery cover plate can be reduced, and at the same time, the material used for the entire conductor can be reduced, reducing costs.

[0019] (3) The entire insulating member is injection-molded, so that the insulating member is tightly combined between the conductor and the cover plate body, improving the electrical isolation while improving the sealing performance between the conductor and the cover plate body, and also improving the structural strength of the battery cover plate assembly. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1A structural form of the battery cover assembly disclosed by the present utility model;

[0022] Figure 2 A schematic structural diagram of the cover body and the conductor disclosed by the present utility model;

[0023] Figure 3 Another structural form of the battery cover assembly disclosed by the present utility model;

[0024] Reference numerals:

[0025] 1. Cover body; 11. Mounting hole; 2. Conductor; 21. Pole column; 22. Adapter piece; 3. Insulating part; 31. First part; 32. Second part; 210. Cavity; 220. Extension part; 230. Limiting ring; 33. Third part; 34. Fourth part. Detailed implementation manners

[0026] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0027] As Figure 1 shown, in combination with Figure 2 and 3 , an embodiment of the present utility model discloses a battery cover assembly, including a cover body 1, a conductor 2 and an insulating part 3.

[0028] Among them, the cover body 1 is a rectangular thin plate structure. The cover body 1 is made of metal, preferably an optical aluminum plate. The cover body 1 is provided with mounting holes 11 for assembling the conductor 2. Two mounting holes 11 are provided in the length direction of the cover body 1, respectively for assembling conductors 2 of different polarities.

[0029] The conductor 2 is used to conduct current between the tab inside the battery and the external power consumption circuit of the battery. In this embodiment, the conductor 2 includes an adapter piece 22 and a pole column 21 integrally and fixedly arranged on the surface of the adapter piece 22. The pole column 21 passes through the mounting hole 11 and extends out of the top surface of the cover body 1. The adapter piece 22 is located at the bottom surface of the cover body 1. The pole column 21 is used to directly connect to the external power consumption circuit of the battery, and the adapter piece 22 is used to connect to the tab inside the battery, so that the tab inside the battery directly realizes current conduction with the external power consumption circuit through the adapter piece 22 and the pole column 21. The components through which the current flows are fewer, and the contact internal resistance is reduced.

[0030] The insulating part 3 is used to establish electrical isolation between the conductor 2 and the cover plate body 1. In this embodiment, the insulating part 3 includes a first part 31 and a second part 32. The first part 31 is fixedly arranged between the bottom surface of the cover plate body 1 and the adapter piece 22. It should be noted that the first part 31 covers the entire bottom surface of the cover plate body 1, which is to prevent the internal core package of the battery from contacting and short-circuiting with the cover plate body 1. The second part 32 is fixedly located between the outer side wall of the pole post 21 and the inner side wall of the mounting hole 11. While the second part 32 realizes the electrical isolation between the pole post 21 and the cover plate body 1, it also realizes the sealing performance at the connection between the pole post 21 and the mounting hole 11, preventing the internal electrolyte of the battery from leaking. In this embodiment, the second part 32 is integrally and fixedly connected to the first part 31. With this setting, during the production and assembly process of the entire battery cover plate assembly, after the pole post 21 on the conductor 2 is installed in the mounting hole 11, the insulating part 3 can be integrally injection-molded between the cover plate body 1 and the conductor 2 through the injection molding process.

[0031] In the battery cover plate assembly disclosed in this embodiment, by forming the pole post 21 and the adapter piece 22 into a whole, during assembly, the conductor 2, the cover plate body 1, and the insulating part 3 are directly integrally injection-molded, reducing the use of rivets. The number of components of the entire battery cover plate assembly is small, the structure is simple, and the assembly process is simplified. At the same time, the integration of the pole post 21 and the adapter piece 22 reduces the contact internal resistance of the connection between the rivet, the pole post 21, and the adapter piece 22, enabling the current to only flow through the adapter piece 22 and the pole post 21, greatly reducing the battery internal resistance and improving the safety of battery use.

[0032] As some embodiments, the adapter piece 22 is of a square structure, and the center of the pole post 21 coincides with the center of the adapter piece 22. With this setting, it is convenient for the tab to be directly welded on the square-structured adapter piece 22. At the same time, the welding position of the tab and the adapter piece 22 is on the same straight line as the pole post 21, which greatly reduces the current flow path, further reduces the battery internal resistance, and improves the overcurrent capacity.

[0033] As other embodiments, a cavity 210 is provided at the central axis inside the pole post 21 to make the pole post 21 form a hollow shell structure. The cavity 210 penetrates through the adapter piece 22. By setting the pole post 21 as a hollow structure, the overall weight of the battery cover plate can be reduced, and at the same time, the material used for the entire conductor 2 can be reduced, which can reduce costs.

[0034] It should be noted that the pole post 21 and the adapter piece 22 are integrally formed. Therefore, the cavity 210 inside the pole post 21 penetrates through the adapter piece 22, which is for the convenience of manufacturing the entire conductor 2.

[0035] Since the cavity 210 penetrates through the adapter piece 22, the welding area between the adapter piece 22 outside the pole column 21 and the tab is reduced, which is not conducive to realizing the tab welding operation. Therefore, in this embodiment, an extension portion 220 is provided on one side of the adapter piece 22 along the length direction of the cover body 1, and the extension portion 220 is used to connect with the tab. With this setting, the extension portion 220 is provided by lengthening one side of the adapter piece 22, thereby providing sufficient welding area for the tab.

[0036] In the above embodiment, the pole column 21 is inserted into the mounting hole 11 and is hermetically fixed between the second part 32 and the cover body 1. However, during use, there may be a risk that the pole column 21 may come out of the mounting hole 11 along the axial direction. Therefore, in this embodiment, a limiting ring 230 is provided on the outer peripheral wall of the end of the pole column 21 extending out of the top surface of the cover body 1. The limiting ring 230 is formed by rolling on the outside of the pole column 21 above the cover body 1 through an internal rolling groove. It should be noted that the forming of the limiting ring 230 is based on the premise that the pole column 21 is a hollow structure, which is convenient to be realized by the rolling groove processing method.

[0037] In this embodiment, the outer diameter of the limiting ring 230 is larger than the inner diameter of the mounting hole 11. Thus, under the action of the limiting ring 230, the conductor 2 can be prevented from coming out of the mounting hole 11 of the cover body 1.

[0038] In order to achieve electrical isolation between the limiting ring 230 and the cover body 1, the insulating part 3 of this embodiment further includes a third part 33. The third part 33 is arranged between the limiting ring 230 and the top surface of the cover body 1, and the third part 33 is integrally and fixedly connected to the second part 32. In this embodiment, the insulating part 3 is distributed between the cover body 1 and the conductor 2 through an injection molding process, and then the first part 31, the second part 32 and the third part 33 which are integrally connected are formed.

[0039] As some preferred embodiments, the insulating part 3 further includes a fourth part 34. The fourth part 34 wraps around the outer surface of the limiting ring 230 and is integrally and fixedly connected to the third part 33. With this setting, the fourth part 34 and the third part 33 integrally wrap around the outer surface of the pole column 21 above the cover body 1, effectively realizing electrical isolation between the limiting ring 230 and the cover body 1. At the same time, the insulating part formed by the fourth part 34 and the third part 33 integrally can strengthen the connection between the pole column 21 and the cover body 1 and improve the structural strength of the cover body 1 assembly.

[0040] To facilitate the embedding of the insulating member 3 between the conductor 2 and the cover plate body 1, in the structural design of this embodiment, it is necessary to ensure that the distance between the limiting ring 230 and the adapter plate 22 is greater than the thickness of the cover plate body 1. At the same time, the outer diameter of the pole column 21 is smaller than the diameter of the mounting hole 11. With such a setting, there is a gap between the entire conductor 2 and the cover plate body 1. In this way, it is convenient to integrally injection-mold the cover plate body 1, the conductor 2, and the insulating member 3.

[0041] It should be noted that the entire insulating member 3 is injection-molded, so that the insulating member 3 is tightly combined between the conductor 2 and the cover plate body 1. While improving electrical isolation, the sealing performance between the conductor 2 and the cover plate body 1 is enhanced, and at the same time, the structural strength of the battery cover plate assembly is also improved.

[0042] This embodiment also provides a battery, including the battery cover plate assembly disclosed in the above embodiment. Since the battery cover plate assembly has fewer components, a simple structure, and simplified assembly processes, during the production process of assembling the battery, the use of components can also be greatly reduced, the weight of the battery can be reduced, and costs can be saved. In addition, the pole column 21 and the adapter plate 22 in the battery cover plate assembly are integrally arranged, reducing the contact internal resistance between the rivet and the pole column 21 and the adapter plate 22, so that the current only flows through the adapter plate 22 and the pole column 21, greatly reducing the battery internal resistance and improving the safety of battery use.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery cover assembly, characterized in that, Comprising: A cover plate body (1), on which there is an installation hole (11); A conductor (2), including a connecting piece (22) and a pole column (21) integrally and fixedly arranged on the surface of the connecting piece (22), the pole column (21) passes through the installation hole (11) and extends out of the top surface of the cover plate body (1), and the connecting piece (22) is located at the bottom surface of the cover plate body (1); An insulating part (3), including a first part (31) and a second part (32), the first part (31) is fixedly arranged between the bottom surface of the cover plate body (1) and the connecting piece (22), the second part (32) is fixedly located between the outer side wall of the pole column (21) and the inner side wall of the installation hole (11), and the second part (32) is integrally and fixedly connected to the first part (31).

2. The battery cover plate assembly according to claim 1, characterized in that: The connecting piece (22) is of a square structure, and the center of the pole column (21) coincides with the center of the connecting piece (22).

3. The battery cover assembly according to claim 2, wherein: A cavity (210) is arranged at the central axis inside the pole column (21) so that the pole column (21) forms a hollow shell structure, and the cavity (210) penetrates through the connecting piece (22).

4. The battery cover assembly according to claim 3, wherein: An extension part (220) is arranged on one side of the connecting piece (22) along the length direction of the cover plate body (1), and the extension part (220) is used for connecting with a pole ear.

5. The battery cover plate assembly according to claim 3 or 4, characterized in that: A limiting ring (230) is arranged on the outer peripheral wall of one end of the pole column (21) extending out of the top surface of the cover plate body (1), and the insulating part (3) further includes a third part (33), the third part (33) is arranged between the limiting ring (230) and the top surface of the cover plate body (1), and the third part (33) is integrally and fixedly connected to the second part (32).

6. The battery cover assembly according to claim 5, wherein: The insulating part (3) further includes a fourth part (34), the fourth part (34) wraps the outer surface of the limiting ring (230), and is integrally and fixedly connected to the third part (33).

7. The battery cover plate assembly according to claim 6, characterized in that: The distance between the limiting ring (230) and the connecting piece (22) is greater than the thickness of the cover plate body (1), the outer diameter of the pole column (21) is smaller than the diameter of the installation hole (11), and the cover plate body (1), the conductor (2) and the insulating part (3) are integrally injection molded.

8. A battery, characterized in that, Including the battery cover plate assembly according to any one of claims 1 to 7.

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