Battery cover plate and battery

Abstract

The embodiment of the utility model provides a battery cover plate and a battery, and relates to the technical field of batteries. The battery cover plate comprises a cover plate body and a sealing nail. A liquid injection hole is formed in the cover plate body. The liquid injection hole comprises a first hole section, a second hole section and a third hole section which are sequentially connected. The diameter of the first hole section is larger than that of the second hole section so that a first contact part can be formed between the first hole section and the second hole section, and the diameter of the third hole section is larger than that of the second hole section so that a second contact part can be formed between the second hole section and the third hole section. The sealing nail comprises a first sealing head, a sealing column and a second sealing head which are sequentially connected, the diameter of the first sealing head is larger than that of the sealing column, the diameter of the second sealing head is larger than that of the sealing column, and when the sealing nail seals the liquid injection hole, the first sealing head abuts against the first contact part, and the second sealing head abuts against the second contact part. The sealing nail can be prevented from falling into a battery or being extruded out of a battery seal, and the safety of the battery is improved.

Description

Technical Field

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

[0002] In the production process of lithium-ion batteries, the sealing process after secondary electrolyte filling is a crucial step to ensure battery performance and safety. Currently, aluminum-cased batteries often use sealing nails for pre-sealing after secondary electrolyte filling to prevent electrolyte leakage. The sealing nails are fixed in position by the friction between themselves and the filling hole, ensuring that the seal remains even when the internal gas pressure of the battery increases.

[0003] However, during handling, the battery casing may be compressed and deformed, and the sealing pins may be squeezed out of the battery seal or fall into the battery. This phenomenon can not only cause the battery seal to fail, but may also introduce foreign objects, thus adversely affecting the battery's safety and performance. Utility Model Content

[0004] The purpose of this utility model is to provide a battery cover that can prevent the sealing nail from falling into the battery or being squeezed out of the battery seal, ensuring the sealing effect, preventing leakage or foreign objects from entering the battery, and improving battery safety.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a battery cover, comprising:

[0007] The cover plate body has an injection hole. From the outside to the inside of the cover plate body, the injection hole includes a first hole segment, a second hole segment, and a third hole segment connected in sequence. The diameter of the first hole segment is larger than the diameter of the second hole segment so that a first contact portion is formed between the first hole segment and the second hole segment. The diameter of the third hole segment is larger than the diameter of the second hole segment so that a second contact portion is formed between the second hole segment and the third hole segment.

[0008] The sealing pin includes a first sealing head, a sealing post, and a second sealing head connected in sequence. The diameter of the first sealing head is larger than the diameter of the sealing post, and the diameter of the second sealing head is larger than the diameter of the sealing post. When the sealing pin seals the injection hole, the first sealing head abuts against the first contact portion, and the second sealing head abuts against the second contact portion.

[0009] In an optional embodiment, the second sealing head includes a sealing head body and a fastening member. The sealing head body is connected to the end of the sealing post away from the first sealing head. The fastening member is connected to the edge of the sealing head body facing the sealing post, and the fastening member is spaced apart from the sealing post. When the sealing pin seals the injection hole, the end of the fastening member away from the sealing head body abuts against the second contact portion.

[0010] In an optional embodiment, when the sealing pin seals the injection hole, the end of the fastening member away from the sealing post abuts against the inner wall of the third hole segment.

[0011] In an optional embodiment, the diameter of the sealing head body gradually decreases from the outer side to the inner side of the cover plate body.

[0012] In an optional embodiment, the inner wall of the fastening member is set at an angle to the outer wall of the sealing post.

[0013] In an optional embodiment, the outer wall diameter of the fastening element is larger than the diameter of the sealing head body.

[0014] In an optional embodiment, the connection between the first hole segment and the second hole segment is provided with a rounded corner, and the connection between the second hole segment and the third hole segment is provided with an edge.

[0015] In an optional embodiment, a liquid injection hole cover plate is also provided in the first hole section, and the liquid injection hole cover plate is placed on top of the first sealing head.

[0016] In an optional embodiment, the diameter of the first hole segment is larger than the diameter of the first sealing head.

[0017] Secondly, this utility model provides a battery, including the battery cover plate described in any of the foregoing embodiments.

[0018] The beneficial effects of the battery cover and battery provided in this embodiment of the utility model include:

[0019] The battery cover of this utility model includes a cover body and a sealing pin. The cover body has an injection hole. From the outer side to the inner side of the cover body, the injection hole includes a first segment, a second segment, and a third segment connected in sequence. The diameter of the first segment is larger than the diameter of the second segment, forming a first contact portion between the first and second segments. The diameter of the third segment is larger than the diameter of the second segment, forming a second contact portion between the second and third segments. The sealing pin includes a first sealing head, a sealing post, and a second sealing head connected in sequence. The diameter of the first sealing head is larger than the diameter of the sealing post, and the diameter of the second sealing head is larger than the diameter of the sealing post. When the sealing pin seals the injection hole, the first sealing head abuts against the first contact portion, and the second sealing head abuts against the second contact portion. By abutting the first sealing head against the first contact portion, the sealing pin is prevented from falling into the battery. By abutting the second sealing head against the second contact portion, the sealing pin is prevented from being squeezed out of the battery cover. This invention can prevent the sealing nail from falling into the battery or being squeezed out of the battery seal, ensuring the sealing effect, preventing leakage or foreign objects from entering the battery, and improving battery safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the battery cover provided in this embodiment;

[0022] Figure 2 This is a schematic diagram of the injection hole provided in this embodiment;

[0023] Figure 3 A structural schematic diagram of the sealing nail is provided for this embodiment;

[0024] Figure 4 This is a cross-sectional view of the sealing nail provided in this embodiment.

[0025] Icons: 100-Battery cover; 10-Cover body; 11-Injection hole; 111-First hole segment; 112-Second hole segment; 113-Third hole segment; 114-Rounded corner; 115-Edge; 12-Injection hole cover; 20-Sealing pin; 21-First sealing head; 22-Sealing post; 23-Second sealing head; 231-Sealing head body; 232-Fastening component. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they 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.

[0030] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0031] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0032] Please refer to Figures 1-4 The battery cover 100 provided by this utility model is applied to a battery and serves to seal the inside of the battery, provide electrical connection, and ensure battery safety.

[0033] The battery cover 100 includes a cover body 10 and a sealing pin 20. The cover body 10 has an injection hole 11. From the outside to the inside of the cover body 10, the injection hole 11 includes a first segment 111, a second segment 112, and a third segment 113 connected in sequence. The diameter of the first segment 111 is larger than the diameter of the second segment 112, forming a first contact portion between the first segment 111 and the second segment 112. The diameter of the third segment 113 is larger than the diameter of the second segment 112, forming a second contact portion between the second segment 112 and the third segment 113. The sealing pin 20 includes a first sealing head 21, a sealing post 22, and a second sealing head 23 connected in sequence. The diameter of the first sealing head 21 is larger than the diameter of the sealing post 22, and the diameter of the second sealing head 23 is larger than the diameter of the sealing post 22. When the sealing pin 20 seals the injection hole 11, the first sealing head 21 abuts against the first contact portion, and the second sealing head 23 abuts against the second contact portion.

[0034] Understandably, the cover body 10 is used to install on the battery and seal it. The outer side of the cover body 10 refers to the side of the cover body 10 away from the inside of the battery, while the inner wall of the cover body 10 faces the inside of the battery. The injection hole 11 is used to inject electrolyte into the battery, and the sealing pin 20 is used to seal the injection hole 11 after injection to prevent dust, water, and other impurities from entering the battery, protecting the battery from external environmental damage, and preventing electrolyte leakage.

[0035] In this embodiment, the first hole segment 111, the second hole segment 112, and the third hole segment 113 form a stepped hole that is larger at both ends and smaller in the middle. The first contact portion is the bottom surface of the first hole segment 111, and the second contact portion is the top surface of the third hole segment 113. The sealing nail 20 has a structure that is larger at both ends and smaller in the middle. It can be understood that in this embodiment, the second sealing head 23 of the sealing nail 20 is an elastic structure. The second sealing head 23 can deform to a certain extent, thereby entering the second hole segment 112 and then the third hole segment 113. When the sealing nail 20 is inserted, the second sealing head 23 enters the second hole segment 112 from the top. At this time, the second sealing head 23 deforms under the pressure of the side wall of the second hole segment 112. The sealing nail 20 continues to move downward. When the second sealing head 23 enters the third hole segment 113, the second sealing head 23 returns to its original shape and abuts against the second contact portion. At this time, the first sealing head 21 abuts against the first contact portion, and the sealing nail 20 seals the injection hole 11. The sealing head 21 abuts against the first contact portion, thereby preventing the sealing pin 20 from falling into the battery. The second sealing head 23 abuts against the second contact portion, thereby preventing the sealing pin 20 from being squeezed out of the battery cover plate 100.

[0036] Furthermore, the second sealing head 23 includes a sealing head body 231 and a fastening member 232. The sealing head body 231 is connected to the end of the sealing post 22 away from the first sealing head 21. The fastening member 232 is connected to the edge of the end of the sealing head body 231 facing the sealing post 22, and the fastening member 232 is spaced apart from the sealing post 22. When the sealing pin 20 seals the injection hole 11, the end of the fastening member 232 away from the sealing head body 231 abuts against the second contact portion.

[0037] Specifically, in this embodiment, the fastening member 232 is connected to the sealing head body 231 and is arranged upwards, so that the top of the fastening member 232 abuts against the second contact portion. By spaced apart from the sealing post 22, the fastening member 232 can deform toward the sealing post 22 when the second sealing head 23 enters the second hole section 112.

[0038] Furthermore, when the sealing pin 20 seals the injection hole 11, the end of the fastening member 232 away from the sealing post 22 abuts against the inner wall of the third hole section 113. It is understood that when the second sealing head 23 enters the third hole section 113 from the second hole section 112, the fastening member 232 springs up, the outer wall of the fastening member 232 abuts against the inner wall of the third hole section 113, and the top of the fastening member 232 abuts against the second contact portion, further increasing the friction between the second sealing head 23 and the third hole section 113, thereby preventing the sealing pin 20 from falling off the cover plate body 10.

[0039] In this embodiment, the diameter of the sealing head body 231 gradually decreases from the outer side to the inner side of the cover plate body 10. It can be understood that by setting the sealing head body 231 to a structure that gradually decreases in size from top to bottom, that is, the second sealing head 23 has a structure with a small head and a large tail, it is easier for the sealing head body 231 to enter the interior of the second hole section 112 from the first hole section 111.

[0040] Specifically, in this embodiment, the sealing head body 231 is configured as a round head structure. In other embodiments, the sealing head body 231 may be configured as a conical structure. This utility model does not limit the shape of the sealing head body 231.

[0041] Furthermore, in this embodiment, the interior of the fastening member 232 is set at an angle to the outer wall of the sealing post 22. Specifically, in this embodiment, the fastening member 232 gradually tilts outward from the direction upward from the connection position with the sealing head body 231, so that after the second sealing head 23 enters the third hole section 113, the fastening member 232 can fit tightly against the inner wall of the third hole section 113, thereby increasing the friction between the second sealing head 23 and the third hole section 113, and further preventing the sealing pin 20 from falling off from the injection hole 11.

[0042] Specifically, in this embodiment, the outer diameter of the fastening member 232 is larger than the diameter of the sealing head body 231. This allows the fastening member 232 to fit tightly against the inner wall of the third hole section 113 after the second sealing head 23 enters the third hole section 113, thereby increasing the friction between the second sealing head 23 and the third hole section 113 and further preventing the sealing pin 20 from falling off from the injection hole 11.

[0043] Please refer to Figure 2 A rounded corner 114 is provided at the connection between the first hole segment 111 and the second hole segment 112. An edge 115 is provided at the connection between the second hole segment 112 and the third hole segment 113. It can be understood that providing the rounded corner 114 at the connection between the first hole segment 111 and the second hole segment 112 facilitates the entry of the second sealing head 23 into the second hole segment 112 from the rounded corner 114. Providing the edge 115 at the connection between the second hole segment 112 and the third hole segment 113 prevents the second sealing head 23 from sliding back into the second hole segment 112 after entering the third hole segment 113.

[0044] Please refer to Figure 1 An injection hole cover plate 12 is also provided in the first hole section 111. The injection hole cover plate 12 covers the first sealing head 21. It can be understood that by providing the injection hole cover plate 12, dust and other impurities are prevented from accumulating in the first hole section and thus entering the injection hole 11.

[0045] Furthermore, the diameter of the first hole segment 111 is larger than the diameter of the first sealing head 21. It is understood that when the sealing pin 20 seals the injection hole 11, the first sealing head 21 abuts against the first contact portion, and a gap remains between the outer wall of the first sealing head 21 and the inner wall of the first hole segment 111, thus facilitating the removal of the sealing pin 20. In addition, the diameter of the injection hole cover plate 12 is larger than the diameter of the first sealing head 21, and the shape of the injection hole cover plate 12 matches that of the first hole segment 111. The injection hole cover plate 12 covers the first hole segment 111, preventing dust and other impurities from accumulating in the first hole segment and thus entering the injection hole 11.

[0046] The beneficial effects of the battery cover 100 and battery provided in this embodiment of the present invention include:

[0047] The battery cover 100 of this utility model includes a cover body 10 and a sealing pin 20. The cover body 10 has an injection hole 11. From the outer side to the inner side of the cover body 10, the injection hole 11 includes a first segment 111, a second segment 112, and a third segment 113 connected in sequence. The diameter of the first segment 111 is larger than the diameter of the second segment 112, so that a first contact portion is formed between the first segment 111 and the second segment 112. The diameter of the third segment 113 is larger than the diameter of the second segment 112, so that a second contact portion is formed between the second segment 112 and the third segment 113. The sealing pin 20 includes a first sealing head 21, a sealing post 22, and a second sealing head 23 connected in sequence. The diameter of the first sealing head 21 is larger than the diameter of the sealing post 22, and the diameter of the second sealing head 23 is larger than the diameter of the sealing post 22. When the sealing pin 20 seals the injection hole 11, the first sealing head 21 abuts against the first contact portion, and the second sealing head 23 abuts against the second contact portion. By abutting the first sealing head 21 against the first contact portion, the sealing pin 20 is prevented from falling into the battery. By abutting the second sealing head 23 against the second contact portion, the sealing pin 20 is prevented from being squeezed out of the battery cover plate 100. This invention can prevent the sealing pin 20 from falling into the battery or being squeezed out of the battery seal, ensuring a sealing effect, preventing leakage or foreign objects from entering the battery, and improving battery safety.

[0048] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery cover plate, characterized by, include: The cover plate body has an injection hole. From the outside to the inside of the cover plate body, the injection hole includes a first hole segment, a second hole segment, and a third hole segment connected in sequence. The diameter of the first hole segment is larger than the diameter of the second hole segment so that a first contact portion is formed between the first hole segment and the second hole segment. The diameter of the third hole segment is larger than the diameter of the second hole segment so that a second contact portion is formed between the second hole segment and the third hole segment. The sealing pin includes a first sealing head, a sealing post, and a second sealing head connected in sequence. The diameter of the first sealing head is larger than the diameter of the sealing post, and the diameter of the second sealing head is larger than the diameter of the sealing post. When the sealing pin seals the injection hole, the first sealing head abuts against the first contact portion, and the second sealing head abuts against the second contact portion.

2. The battery cover plate of claim 1, wherein, The second sealing head includes a sealing head body and a fastening member. The sealing head body is connected to the end of the sealing post away from the first sealing head. The fastening member is connected to the edge of the sealing head body facing the sealing post, and the fastening member is spaced apart from the sealing post. When the sealing pin seals the injection hole, the end of the fastening member away from the sealing head body abuts against the second contact portion.

3. The battery cover plate of claim 2, wherein, When the sealing pin seals the injection hole, the end of the fastening member away from the sealing post abuts against the inner wall of the third hole section.

4. The battery cover plate of claim 2, wherein, The diameter of the sealing head body gradually decreases from the outside to the inside of the cover plate body.

5. The battery cover plate of claim 2, wherein, The inner wall of the fastener is set at an angle to the outer wall of the sealing post.

6. The battery cover plate of claim 2, wherein, The outer diameter of the fastening element is larger than the diameter of the sealing head body.

7. The battery cover plate of claim 1, wherein, The connection between the first hole segment and the second hole segment is provided with rounded corners, and the connection between the second hole segment and the third hole segment is provided with sharp corners.

8. The battery cover plate of claim 1, wherein, The first hole section is also provided with an injection hole cover plate, which is placed on top of the first sealing head.

9. The battery cover plate of claim 1 or 8, wherein, The diameter of the first hole is larger than the diameter of the first sealing head.

10. A battery, characterized by Includes the battery cover as described in any one of claims 1-9.

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