Cover plate assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly and a battery, the cover plate assembly is connected with a battery cell, the cover plate assembly comprises a cover plate body, a pole, a conductive block, upper plastic cement and an anti-twist block, and the pole is arranged on the cover plate body; the conductive block is electrically connected with one end, deviating from the battery cell, of the pole; the upper plastic is arranged between the conductive block and the cover plate body; the anti-twisting block penetrates through the upper plastic, a containing groove is formed in the surface, deviating from the battery cell, of the cover plate body, an anti-twisting groove is formed in the surface, facing the cover plate body, of the conductive block, and the two ends of the anti-twisting block are inserted into the containing groove and the anti-twisting groove respectively so as to limit the relative positions of the conductive block, the upper plastic and the cover plate body; insulation protrusions are arranged on the surface, facing the cover plate body, of the upper plastic and correspond to the anti-twisting blocks in position, and the insulation protrusions are arranged around the ends, facing the cover plate body, of the anti-twisting blocks. Therefore, the insulating bulge can prevent foreign matters from being electrically connected with the conductive block or the cover plate body, so that the risk of short circuit is reduced, and the safety of the battery is improved.

Description

Technical Field

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

[0002] Batteries are widely used in daily life, industrial production and modern technology. A battery consists of a cover plate, a casing and a cell. The cover plate is connected to terminals and conductive blocks. The conductive blocks are electrically connected to the cell through the terminals, thereby enabling power supply to external circuits.

[0003] When assembling the terminal and the cover plate, an anti-twist block is usually placed between the terminal and the cover plate, and the anti-twist block is connected to both the terminal and the cover plate to prevent the terminal from twisting. However, in order to connect the anti-twist block to the cover plate, a positioning recess needs to be opened on the cover plate to accommodate the anti-twist block. When the positioning recess is formed by stamping with a stamping die, due to the many stamping steps, foreign objects such as metal wires may be generated due to damage to the stamping equipment or stamping die. These foreign objects are difficult to remove during cleaning and dust removal, which may cause the metal wires to come into contact with the conductive block or the cover plate during the cover plate assembly process, increasing the risk of short circuit and affecting the safety of the battery. Utility Model Content

[0004] The purpose of this utility model is to provide a cover plate assembly and a battery to solve the problem of high short-circuit risk in the battery cover plate during the assembly of the anti-twist block.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a cover plate assembly connected to a battery cell includes: a cover plate body and a terminal post disposed on the cover plate body; a conductive block electrically connected to the end of the terminal post facing away from the battery cell; an upper plastic layer disposed between the conductive block and the cover plate body; and an anti-twist block inserted through the upper plastic layer. A receiving groove is formed on the surface of the cover plate body facing away from the battery cell, and an anti-twist groove is formed on the surface of the conductive block facing the cover plate body. Both ends of the anti-twist block are respectively inserted into the receiving groove and the anti-twist groove to limit the relative positions of the conductive block, the upper plastic layer, and the cover plate body. An insulating protrusion is provided on the surface of the upper plastic layer facing the cover plate body corresponding to the position of the anti-twist block, and the insulating protrusion is arranged around the end of the anti-twist block facing the cover plate body.

[0007] Preferably, multiple anti-twist blocks are provided, and the multiple anti-twist blocks are circumferentially spaced on the corresponding conductive blocks.

[0008] Preferably, the anti-torsion block has a cylindrical structure.

[0009] Preferably, the anti-twist block is made of ceramic material.

[0010] Preferably, the anti-torsion block is configured to be interference-fitted with the insulating protrusion.

[0011] Preferably, the insulating protrusion is spaced apart from the outer edge of the upper plastic.

[0012] Preferably, the inner wall of the insulating protrusion facing one end of the battery cell is chamfered.

[0013] Preferably, the chamfer is C0.3.

[0014] Preferably, the maximum thickness of the insulating protrusion is in the range of 0.5mm-0.6mm; and / or, the height of the insulating protrusion is in the range of 0.5mm-0.6mm.

[0015] In a second aspect, a battery includes a cell, a housing, and a cover assembly as described above, wherein the cell is disposed inside the housing, and the housing is connected to the cover body.

[0016] The beneficial effects of this utility model are:

[0017] A cover plate assembly connected to a battery cell includes a cover plate body, a terminal post, a conductive block, an upper plastic layer, and an anti-twist block. The terminal post is disposed on the cover plate body. The conductive block is electrically connected to the end of the terminal post facing away from the battery cell. The upper plastic layer is disposed between the conductive block and the cover plate body. The anti-twist block passes through the upper plastic layer. A receiving groove is formed on the surface of the cover plate body facing away from the battery cell, and an anti-twist groove is formed on the surface of the conductive block facing the cover plate body. Both ends of the anti-twist block are respectively inserted into the receiving groove and the anti-twist groove to limit the relative positions of the conductive block, the upper plastic layer, and the cover plate body. An insulating protrusion is provided on the surface of the upper plastic layer facing the cover plate body corresponding to the position of the anti-twist block, and the insulating protrusion is arranged around the end of the anti-twist block facing the cover plate body.

[0018] In this way, the insulating protrusion can separate the anti-twist block from the side wall of the receiving groove, preventing metal wires and other debris generated during the processing of the receiving groove from contacting the conductive block, reducing the risk of short circuit. Furthermore, the receiving groove and the anti-twist groove can limit the relative position of the anti-twist block, the conductive block, and the cover plate body, simplifying the assembly steps, preventing the pole from twisting during the assembly process, and improving the structural stability of the cover plate assembly, thereby improving the safety and reliability of the battery. Attached Figure Description

[0019] Figure 1 This is a side sectional view of the cover plate assembly in one embodiment of the present utility model;

[0020] Figure 2 This is one embodiment of the present invention. Figure 1 Enlarged view of point A;

[0021] Figure 3This is a schematic diagram of the first structure of the upper plastic in one embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the second structure of the upper plastic in one embodiment of this utility model;

[0023] Figure 5 This is a front view of the cover plate assembly in one embodiment of the present invention;

[0024] Figure 6 This is a partial structural schematic diagram of the cover plate assembly in one embodiment of the present invention.

[0025] In the picture:

[0026] 1. Cover plate body; 11. Receiving groove; 2. Pole post; 3. Conductive block; 31. Anti-torsion groove; 4. Upper plastic; 41. Insulating protrusion; 42. Connecting hole; 5. Anti-torsion block; 6. Lower plastic; 7. Sealing ring. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] See Figure 1 and Figure 2 This utility model provides a cover plate assembly that is connected to a battery cell (not shown in the figure). The cover plate assembly includes a cover plate body 1, a terminal post 2, a conductive block 3, an upper plastic 4, and an anti-twist block 5. The terminal post 2 is disposed on the cover plate body 1. The conductive block 3 is electrically connected to the end of the terminal post 2 away from the battery cell. The upper plastic 4 is disposed between the conductive block 3 and the cover plate body 1. The anti-twist block 5 passes through the upper plastic 4. A receiving groove 11 is formed on the surface of the cover plate body 1 away from the battery cell. An anti-twist groove 31 is formed on the surface of the conductive block 3 facing the cover plate body 1. The two ends of the anti-twist block 5 are respectively inserted into the receiving groove 11 and the anti-twist groove 31 to limit the relative positions of the conductive block 3, the upper plastic 4, and the cover plate body 1. An insulating protrusion 41 is provided on the surface of the upper plastic 4 facing the cover plate body 1 corresponding to the position of the anti-twist block 5. The insulating protrusion 41 is arranged around the end of the anti-twist block 5 facing the cover plate body 1.

[0032] See Figures 2 to 4 In this embodiment, the cover plate assembly also includes a lower plastic 6 and a sealing ring 7. The lower plastic 6 is disposed on the side of the cover plate body 1 facing the battery cell, and the sealing ring 7 is disposed between the electrode post 2 and the cover plate body 1. The electrode post 2 is disposed sequentially through the lower plastic 6, the cover plate body 1, the upper plastic 4, and the conductive block 3. There are two electrode posts 2, and the upper plastic 4 is disposed one-to-one with the electrode post 2. The cover plate body 1 has a groove (not shown in the figure) adapted to the upper plastic 4 so that the upper plastic 4 is engaged with the cover plate body 1, thereby restricting the position of the upper plastic 4. The upper plastic 4 has a connecting hole 42, and the insulating protrusion 41 is coaxially disposed with the connecting hole 42. The insulating protrusion 41 is integrally formed with the upper plastic 4. The diameter of the receiving groove 11 is adapted to the diameter of the insulating protrusion 41 so that the insulating protrusion 41 is engaged in the receiving groove 11.

[0033] Thus, by setting the insulating protrusion 41, the anti-twist block 5 can be separated from the side wall of the receiving groove 11 by the insulating protrusion 41. Even if there are metal wires during the assembly process, the insulating protrusion 41 can prevent foreign objects from forming an electrical connection with the conductive block 3 or the cover plate body 1, thereby reducing the risk of short circuit and improving the safety of the battery. The two ends of the anti-twist block 5 are located in the receiving groove 11 and the anti-twist groove 31 respectively, which can prevent the pole post 2 from twisting during the assembly process and improve the structural stability of the cover plate assembly, avoiding electrical connection failure or short circuit due to component displacement. The insulating protrusion 41 is integrally formed with the upper plastic 4, which can facilitate the processing of the upper plastic 4, simplify the assembly steps, and the insulating protrusion 41 can cooperate with the connecting hole 42 to form a channel that facilitates the assembly of the anti-twist block 5, improving the assembly efficiency and the connection stability of the anti-twist block 5.

[0034] It is understood that the insulating protrusion 41 can also be inserted into the upper plastic 4. The connection method between the insulating protrusion 41 and the upper plastic 4 can be adjusted according to actual needs. In this embodiment, the insulating protrusion 41 and the upper plastic 4 are integrally molded for the convenience of production and processing, and will not be listed in detail here.

[0035] See Figure 5 and Figure 6 In some embodiments, multiple anti-twist blocks 5 are provided, and the multiple anti-twist blocks 5 are circumferentially spaced on the corresponding conductive blocks 3.

[0036] In this embodiment, one pole post 2 is connected to three anti-twist blocks 5, and the three anti-twist blocks 5 are equally spaced around the central axis of the pole post 2. The anti-twist blocks 5 are arranged one-to-one with the insulating protrusions 41, that is, one upper plastic 4 is connected to three insulating protrusions 41.

[0037] Thus, the three anti-twist blocks 5, evenly spaced circumferentially, enhance the anti-twist effect of the terminal post 2, improve the connection stability between the terminal post 2 and the upper plastic 4 and the cover plate body 1, making the terminal post 2 more stable after assembly, reducing the risk of poor electrical connection due to loosening of the terminal post 2, and improving the reliability and safety of the cover plate assembly. By setting insulating protrusions 41 corresponding one-to-one with the anti-twist blocks 5, the insulation performance between the conductive block 3 and the cover plate body 1 can be improved, reducing the risk of foreign objects such as metal wires coming into contact with the conductive block 3 or the cover plate, thereby reducing the risk of short circuit during the assembly of the cover plate body 1 with the anti-twist blocks 5 and improving the safety of the battery.

[0038] It is understandable that the number of anti-twist blocks 5 set on the upper plastic 4 is not limited to three, but can also be two, four, five, etc. The number of anti-twist blocks 5 connected to the upper plastic 4 for the two poles 2 can be equal or unequal, as long as it can prevent the poles 2 from twisting. No further examples will be listed here.

[0039] See Figure 6In some embodiments, the anti-twist block 5 is a cylindrical structure. In this embodiment, the height direction of the anti-twist block 5 is parallel to the height direction of the pole post 2.

[0040] In this way, the sidewall of the cylindrical anti-twist block 5 can closely abut against the sidewall of the anti-twist groove 31, the inner wall of the connecting hole 42, and the inner wall of the insulating protrusion 41, thereby enhancing the connection stability of the anti-twist block 5 and preventing foreign objects such as metal wires from entering the gap between the anti-twist block 5 and the conductive block 3, the upper plastic 4, and the insulating protrusion 41, reducing the risk of short circuits. It also helps to evenly distribute the torsional force of the pole post 2, enhancing the structural stability of the anti-twist block 5, thereby enhancing the insulation performance between the conductive block 3 and the cover plate body 1 and improving the safety of the battery.

[0041] It is understandable that the anti-torsion block 5 can also be a triangular prism structure, a quadrangular prism structure, a conical structure, etc. The shape of the anti-torsion block 5 can be adjusted according to actual needs, and will not be listed in detail here.

[0042] See Figure 6 In some embodiments, the anti-twist block 5 is made of ceramic material.

[0043] Thus, the anti-twist block 5 made of ceramic material has good electrical insulation properties, which can prevent the conductive block 3 from being twisted while maintaining an insulated connection with the cover plate body 1, thereby reducing the risk of short circuit. In addition, the anti-twist block 5 has good structural strength, which can withstand and disperse torsional force, preventing the terminal 2 from shifting or loosening during assembly and use, improving the connection stability between the terminal 2 and the cover plate body 1, and enhancing the overall structural strength of the cover plate assembly, thereby improving the reliability and safety of the battery.

[0044] It is understandable that the anti-twist block 5 can also be made of materials such as resin, plastic, and composite ceramics. The material of the anti-twist block 5 can be adjusted according to actual needs, and will not be listed in detail here.

[0045] See Figure 2 In some embodiments, the anti-twist block 5 is configured with an interference fit with the insulating protrusion 41.

[0046] In this embodiment, the end face of the anti-twist block 5 facing the cover plate body 1 is flush with the end face of the insulating protrusion 41 facing the cover plate body 1.

[0047] Thus, when the anti-twist block 5 is inserted into the connection hole 42, the side wall of the anti-twist block 5 and the side wall of the insulating protrusion 41 can be tightly abutted, preventing foreign objects such as metal wires from entering the conductive area, reducing the risk of short circuit, improving the insulation and sealing performance of the connection between the anti-twist block 5 and the lower plastic 6, and the anti-twist block 5 is not easy to loosen in the insulating protrusion 41 after assembly, improving the assembly effect, making the pole post 2 less likely to twist due to the loosening of the anti-twist block 5, and improving the assembly reliability and safety of the cover plate assembly.

[0048] It is understandable that when the anti-twist block 5 is inserted into the connecting hole 42, there may be a gap between the side wall of the anti-twist block 5 and the connecting hole 42 and the side wall of the insulating protrusion 41, so as to facilitate quick assembly. In this embodiment, the interference fit between the anti-twist block 5 and the insulating protrusion 41 is to make the anti-twist block 5 and the insulating protrusion 41 fit tightly together. The connection method between the anti-twist block 5 and the insulating protrusion 41 can be adjusted according to actual needs, and will not be listed in detail here.

[0049] See Figure 4 In some embodiments, the insulating protrusion 41 is spaced apart from the outer edge of the upper plastic 4. That is, there is a gap between the insulating protrusion 41 and the outer edge of the upper plastic 4.

[0050] In this embodiment, there is a gap between the insulating protrusion 41 and the outer edge of the pole 2 away from the cover plate body 1, and the distance between the insulating protrusion 41 and the outer edge of the upper plastic 4 is less than the distance between the insulating protrusion 41 and the outer edge of the pole 2 away from the cover plate body 1.

[0051] Thus, by opening a connection hole 42 at the position corresponding to the insulating protrusion 41 on the upper plastic 4, the connection hole 42 can maintain a certain distance from both the inner and outer edges of the upper plastic 4, thereby improving the structural strength of the upper plastic 4, avoiding stress concentration at the connection between the upper plastic 4 and the anti-torsion block 5, improving the overall structural stability of the cover assembly, and thus enhancing the safety and reliability of the battery.

[0052] It is understandable that the positions of the insulating protrusion 41 and the anti-twist block 5 can be adjusted according to actual needs, so as to limit the relative positions of the pole post 2, the upper plastic 4, and the cover plate body 1 by means of the anti-twist block 5. No further details are provided here.

[0053] See Figure 2 In some embodiments, the inner wall of the insulating protrusion 41 facing one end of the cell is chamfered. Further, in some embodiments, the chamfer is C0.3.

[0054] In this embodiment, the inner wall of the end of the connecting hole 42 facing away from the insulating protrusion 41 is also provided with a chamfer.

[0055] Thus, by setting a chamfer, it is easier to guide the anti-twist block 5 into the insulating protrusion 41 and to make an interference fit with the insulating protrusion 41, and to reduce the stress concentration at the connection between the insulating protrusion 41 and the anti-twist block 5. This makes it less likely for the anti-twist block 5 to be damaged or loose when it is connected to the cover plate body 1, the upper plastic 4, and the conductive block 3, thereby improving the connection stability of the anti-twist block 5 and preventing foreign objects such as metal wires from entering between the anti-twist block 5 and the insulating protrusion 41, reducing the risk of short circuits and improving the safety and reliability of the battery.

[0056] Understandably, the chamfer on the inner wall of the insulating protrusion 41 facing the end of the battery cell cannot be too small, as this would reduce its guiding effect, nor can it be too large, as this would result in lower structural strength at the location where the chamfer is set on the insulating protrusion 41.

[0057] See Figure 2 In some embodiments, the maximum thickness of the insulating protrusion 41 ranges from 0.5mm to 0.6mm, and the height of the insulating protrusion 41 ranges from 0.5mm to 0.6mm.

[0058] In this embodiment, the maximum thickness of the insulating protrusion 41 (that is, the thickness corresponding to the position of the insulating protrusion 41 without chamfer) can be any value between 0.5mm and 0.6mm or any two values, such as 0.5mm, 0.52mm, 0.54mm, 0.56mm, 0.58mm, 0.6mm, etc.; the height of the insulating protrusion 41 can be any value between 0.5mm and 0.6mm or any two values, such as 0.5mm, 0.52mm, 0.54mm, 0.56mm, 0.58mm, 0.6mm, etc.

[0059] In this way, by limiting the maximum thickness and height of the insulating protrusion 41, the insulating protrusion 41 can have sufficient structural strength to achieve a stable connection with the anti-twist block 5, limit the position of the anti-twist block 5, and effectively separate the anti-twist block 5 from the cover plate body 1, preventing debris such as metal wires from entering between the anti-twist block 5 and the upper plastic 4, reducing the risk of short circuit, and improving the safety and reliability of the battery.

[0060] Understandably, the maximum thickness of the insulating protrusion 41 cannot be too large, as this would occupy too much space in the length direction of the cover plate body 1. The maximum thickness of the insulating protrusion 41 cannot be too small either, as this would make the insulating protrusion 41 too thin and prone to deformation when the anti-twist block 5 is subjected to a large torsional force. The height of the insulating protrusion 41 cannot be too large, as this would occupy too much space in the thickness direction of the cover plate body 1. The height of the insulating protrusion 41 cannot be too small either, as this would make it difficult to guide the anti-twist block 5 into the connecting hole 42.

[0061] See Figure 1 The present invention also provides a battery, including a battery cell, a housing (not shown in the figure) and a cover plate assembly. The battery cell is disposed inside the housing, and the housing and the cover plate body 1 are fixedly connected to form a space for accommodating the battery cell.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A cover plate assembly, characterized in that, The cover plate assembly, connected to the battery cell, includes: The cover plate body (1) and the pole post (2), wherein the pole post (2) is disposed on the cover plate body (1); Conductive block (3), the conductive block (3) is electrically connected to the end of the electrode (2) away from the battery cell; A plastic layer (4) is placed between the conductive block (3) and the cover plate body (1); An anti-twist block (5) is inserted through the upper plastic (4). A receiving groove (11) is opened on the surface of the cover plate body (1) away from the battery cell. An anti-twist groove (31) is opened on the surface of the conductive block (3) facing the cover plate body (1). The two ends of the anti-twist block (5) are respectively inserted into the receiving groove (11) and the anti-twist groove (31) to limit the relative positions of the conductive block (3), the upper plastic (4) and the cover plate body (1). An insulating protrusion (41) is provided on the surface of the upper plastic (4) facing the cover plate body (1) corresponding to the position of the anti-twist block (5). The insulating protrusion (41) is arranged around one end of the anti-twist block (5) facing the cover plate body (1).

2. The cover plate assembly according to claim 1, characterized in that, Multiple anti-twist blocks (5) are provided, and the multiple anti-twist blocks (5) are circumferentially spaced on the corresponding conductive blocks (3).

3. The cover plate assembly according to claim 1, characterized in that, The anti-torsion block (5) has a cylindrical structure.

4. The cover plate assembly according to claim 1, characterized in that, The anti-torsion block (5) is made of ceramic material.

5. The cover plate assembly according to any one of claims 1-4, characterized in that, The anti-twist block (5) is configured with an interference fit with the insulating protrusion (41).

6. The cover plate assembly according to any one of claims 1-4, characterized in that, The insulating protrusion (41) is spaced apart from the outer edge of the upper plastic (4).

7. The cover plate assembly according to any one of claims 1-4, characterized in that, The insulating protrusion (41) has a chamfer on its inner wall facing one end of the battery cell.

8. The cover plate assembly according to claim 7, characterized in that, The chamfer is C0.

3.

9. The cover plate assembly according to any one of claims 1-4, characterized in that, The maximum thickness of the insulating protrusion (41) ranges from 0.5 mm to 0.6 mm; and / or the height of the insulating protrusion (41) ranges from 0.5 mm to 0.6 mm.

10. A battery, characterized in that, It includes a battery cell, a housing, and a cover plate assembly as described in any one of claims 1-9, wherein the battery cell is disposed inside the housing, and the housing is connected to the cover plate body (1).

Images