Battery top cover and lithium battery

Abstract

The utility model provides a battery top cover and a lithium battery, the battery top cover comprises a cover plate and a pole, the pole comprises a pole terminal and a sealing plate; the pole terminal is connected with the cover plate, the pole terminal is provided with a through hole in a penetrating manner along the thickness direction of the cover plate, the through hole comprises a first end part close to the inner surface of the cover plate and a second end part far away from the inner surface of the cover plate, and a tab extends into the through hole from the first end part and is connected with the pole terminal; according to the battery top cover, the battery top cover is divided into the pole terminal and the sealing plate, and the pole terminal is provided with the through hole in a penetrating manner, so that the pole lug can be conveniently mounted in the pole terminal, the mounting is simple and convenient, and the operation is convenient.

Description

Technical Field

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

[0002] The battery is a square hard-shell lithium battery, which includes a shell with an open side, a battery cell arranged in the shell, and a top cover for sealing the open side of the shell. The battery cell is provided with a pole ear, the top cover is provided with a pole column, and the pole ear and the pole column are connected by a connecting piece.

[0003] In order to save space in the shell and improve space utilization, patent CN220086323U provides a battery pole, a battery and an electrical device. The application document omits the connecting plate, and the bottom of the pole is recessed inward to form a groove, and the pole ear extends into the groove and connects with the inner wall of the groove.

[0004] When connecting the pole and the lug, the groove at the bottom of the pole needs to be oriented toward the side that can be seen by the staff. After the lug is connected to the side wall of the groove, the pole is installed back on the top cover. The installation is difficult and inconvenient to operate. Utility Model Content

[0005] In view of this, the utility model proposes a battery top cover and a lithium battery, which divides the battery top cover into two parts: a pole terminal and a sealing plate. The pole terminal is penetrated by a through hole to facilitate the installation of the pole ear into the pole terminal. The installation is simple and easy to operate.

[0006] The technical solution of the utility model is implemented as follows: the utility model provides a battery top cover, including a cover plate and a pole, the pole including a pole terminal and a sealing plate; the pole terminal is connected to the cover plate, the pole terminal is penetrated by a through hole along the thickness direction of the cover plate, the through hole includes a first end close to the inner surface of the cover plate, and a second end away from the inner surface of the cover plate, the pole ear extends from the first end into the through hole and is connected to the pole terminal; the sealing plate is used to seal the second end.

[0007] On the basis of the above technical solution, preferably, the pole terminal includes a terminal body and a bottom flange; the terminal body is connected to the cover plate, and the through hole is arranged on the terminal body; the bottom flange is connected to the terminal body and is located at the first end of the through hole, and the pole ear is connected to the side of the bottom flange close to the sealing plate.

[0008] On the basis of the above technical solution, preferably, the pole terminal includes a terminal body and a top flange; the terminal body is connected to the cover plate, and the through hole is arranged on the terminal body; the top flange is connected to the terminal body and is located at the end of the terminal body away from the cover plate, and the sealing plate is connected to the top flange.

[0009] Further preferably, the pole terminal also includes a bottom flange, which is connected to the terminal body and located at the first end of the through hole, and the pole ear is connected to the side of the bottom flange close to the sealing plate; the thickness of the top flange and the bottom flange are not less than 0.5 mm.

[0010] Preferably, the pole further comprises a plastic ring, and the plastic ring is arranged between the pole terminal and the cover plate to separate the pole terminal and the cover plate.

[0011] More preferably, the pole further comprises a welding ring, and the welding ring is provided between the plastic ring and the cover plate, and is used to connect the plastic ring and the cover plate.

[0012] Further preferably, the cover plate is provided with a through hole along its thickness direction; the battery top cover also includes a receiving portion, the receiving portion is located on the side of the cover plate away from the sealing plate, the receiving portion is connected to the cover plate, and the end of the pole close to the cover plate is located on the receiving portion through the through hole.

[0013] Further preferably, a sealing ring is provided between the receiving portion and the pole to isolate the receiving portion from the pole.

[0014] Further preferably, the receiving portion is a plate-shaped portion, and the thickness of the plate-shaped portion is not less than 0.8 mm.

[0015] The utility model also provides a lithium battery, comprising a shell, a battery core and the battery top cover, wherein the battery top cover also comprises an explosion-proof valve assembly and a lower plastic located on the cover plate.

[0016] The battery cover and lithium battery of the utility model have the following beneficial effects compared with the prior art:

[0017] (1) The pole is configured to include two parts, the pole terminal and the sealing plate. The pole terminal is provided with the through hole along the thickness direction of the cover plate. When assembling the pole ear and the pole, the pole ear is extended into the pole terminal through the first end of the through hole, and the pole ear is connected to the side wall of the through hole. After the connection is completed, the second end of the through hole is sealed by the sealing plate, and the assembly of the pole ear and the pole is completed. During the assembly process, the staff can observe the state of the pole ear through the second end of the through hole, which is convenient for observation and reduces the difficulty of operation.

[0018] (2) A receiving portion is provided below the cover plate, and the end of the pole close to the cover plate is located on the receiving portion through the through hole. When the pole is assembled on the cover plate, a portion of the pole sinks into the shell of the lithium battery, thereby reducing the volume of the pole exposed to the outside, making more full use of the space inside the lithium battery shell, and improving the utilization rate of the shell space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A three-dimensional diagram of a battery top cover of the utility model;

[0021] Figure 2 for Figure 1 sectional view of

[0022] Figure 3 for Figure 2 A magnified view of middle;

[0023] Figure 4 for Figure 1 A cross-sectional view without a sealing plate and a lug;

[0024] Figure 5 A three-dimensional diagram of a lithium battery of the present utility model;

[0025] Figure 6 for Figure 5 sectional view of

[0026] Figure 7 for Figure 1 Cross-sectional view of the middle terminal body.

[0027] Figure numerals: lithium battery 1000, battery top cover 100, cover plate 1, pole 2, pole terminal 21, terminal body 21a, bottom flange 21b, top flange 21c, through hole 21d, first end 21d', second end 21d", sealing plate 22, welding ring 23, plastic ring 24, receiving portion 25, sealing ring 3, shell 200, battery cell 300, pole ear 400, explosion-proof valve assembly 500, lower plastic 600. DETAILED DESCRIPTION

[0028] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1-4 As shown, the utility model provides a battery top cover 100, including a cover plate 1 and a pole 2, wherein the pole 2 includes a pole terminal 21 and a sealing plate 22; the pole terminal 21 is connected to the cover plate 1, and the pole terminal 21 is penetrated by a through hole 21d along the thickness direction of the cover plate 1, wherein the through hole 21d includes a first end 21d' close to the inner surface of the cover plate 1, and a second end 21d", away from the inner surface of the cover plate 1, and a pole ear 400 extends from the first end 21d' into the through hole 21d and is connected to the pole terminal 21; the sealing plate 22 is used to seal the second end 21d".

[0030] In the above technical solution, there is no restriction on the connection method between the cover plate 1 and the pole 2, and the connection can be performed by welding or the like. Since the pole terminal 21 is made of metal, when the pole terminal 21 is installed on the cover plate 1, an insulating material is generally used to separate the pole terminal 21 and the cover plate 1. In some embodiments, the pole terminal 21 is made of aluminum. In other embodiments, the specific shape of the pole terminal 21 is not limited. For example, the pole terminal 21 can be slender, rectangular, elliptical, etc. The pole terminal 21 is penetrated by a through hole 21d along the thickness direction of the cover plate 1, and the through hole 21d includes a first end 21d' close to the inner surface of the cover plate 1, and a second end 21d'' away from the inner surface of the cover plate 1. The pole ear 400 extends from the first end 21d' into the through hole 21d and is connected to the pole terminal 21; the sealing plate 22 is used to seal the second end 21d'. The present application does not limit the specific shape of the sealing plate 22, as long as it can be used to seal the second end 21d', for example, it can be a circular, rectangular or other shaped plate. Preferably, the sealing plate 22 and the second end 21d'' are sealed and connected by welding.

[0031] When assembling the pole lug 400 and the pole 2, the pole lug 400 is extended into the pole terminal 21 through the first end 21d' of the through hole 21d, and the pole lug 400 is connected to the side wall of the through hole 21d. After the connection is completed, the second end 21d" of the through hole 21d is sealed by the sealing plate 22 to complete the assembly of the pole lug 400 and the pole 2. During the assembly process, the staff can observe the state of the pole lug 400 through the second end 21d" of the through hole 21d, which is convenient for observation and reduces the difficulty of operation.

[0032] In the technical solution of the present invention, the pole terminal 21 includes a terminal body 21a and a bottom flange 21b; the terminal body 21a is connected to the cover plate 1, and the through hole 21d is provided on the terminal body 21a; Figure 6 As shown, the bottom flange 21b is connected to the terminal body 21a and is located at the first end 21d' of the through hole 21d. The pole lug 400 is connected to the side of the bottom flange 21b close to the sealing plate 22. One of the purposes of providing the bottom flange 21b is to facilitate the connection between the pole terminal 21 and the pole lug 400 and prevent the pole lug 400 from falling off. In some embodiments, the bottom flange 21b is formed by the end of the terminal body 21a close to the cover plate 1 extending inward. The present application does not limit the specific connection method between the pole lug 400 and the bottom flange 21b. In some embodiments, in order to more tightly connect the pole lug 400, the pole lug 400 is welded to the bottom flange 21b. In other embodiments, in order to ensure the supporting strength of the bottom flange 21b, the thickness of the bottom flange 21b is not less than 0.5mm. In order to strengthen the supporting strength of the bottom flange 21b, reinforcing ribs, honeycomb holes, etc. can also be provided on its surface.

[0033] Furthermore, the pole terminal 21 includes a terminal body 21a and a top flange 21c; the terminal body 21a is connected to the cover plate 1, and the through hole 21d is provided on the terminal body 21a; Figure 5As shown, the top flange 21c is connected to the terminal body 21a and is located at the end of the terminal body 21a away from the cover plate 1. The sealing plate 22 is connected to the top flange 21c. The present application adds the top flange 21c to the terminal body 21a. In some embodiments, the top flange 21c is formed by extending outward from the end of the terminal body 21a away from the cover plate 1. The top flange 21c is connected to the cover plate 1. The terminal body 21a is connected to the cover plate 1 through the top flange 21c, which can make the terminal body 21a and the cover plate 1 more firmly connected, and avoid the terminal body 21a from falling off. In some embodiments, in order to ensure the supporting strength of the top flange 21c, the thickness of the top flange 21c is not less than 0.5mm. In order to strengthen the supporting strength of the top flange 21c, reinforcing ribs, honeycomb holes, etc. can also be set on its surface.

[0034] Understandably, if Figure 2 As shown, the pole 2 also includes a plastic ring 24, which is arranged between the pole terminal 21 and the cover plate 1 to separate the pole terminal 21 and the cover plate 1 to prevent the electricity on the pole terminal 21 from being conducted to the cover plate 1, so that the cover plate 1 is charged. In some embodiments, the specific shape of the plastic ring 24 is not limited, as long as it can play an insulating role. In other embodiments, the specific connection method between the plastic ring 24 and the pole terminal 21 and the cover plate 1 is not limited, for example, they can be connected by glue or the like.

[0035] In some embodiments, in order to ensure a firm connection between the pole 2 and the cover plate 1, welding is generally used, so the pole 2 further includes a welding ring 23, which is disposed between the plastic ring 24 and the cover plate 1 and is used to connect the plastic ring 24 and the cover plate 1. The welding ring 23 and the cover plate 1 can be connected by welding, which is more secure and not easy to fall off. It can be understood that the sealing plate 22, the pole terminal 21, the plastic ring 24 and the welding ring 23 can all use common materials, which can reduce material costs. In some embodiments, the pole terminal 21, the plastic ring 24 and the welding ring 23 are all separately injection molded into separate pole components. In order to improve assembly efficiency, the pole terminal 21, the plastic ring 24 and the welding ring 23 can be assembled in advance. The assembly process is to first use glue or other tools to bond the plastic ring 24 to the pole terminal 21. After the bonding is firm, the welding ring 23 is bonded to the plastic ring 24 by glue or other tools.

[0036] Further, the cover plate 1 is provided with a perforation (not marked in the figure) along its thickness direction; the battery top cover 100 also includes a receiving portion 25, the receiving portion 25 is located on the side of the cover plate 1 away from the sealing plate 22, the receiving portion 25 is connected to the cover plate 1, and the end of the pole 2 close to the cover plate 1 is located on the receiving portion 25 through the perforation. In this technical solution, the specific shape of the receiving portion 25 is not limited, as long as it can be used to place the pole 2. When the pole 2 is assembled on the cover plate 1, a part of the pole 2 sinks into the shell 200 of the lithium battery 1000, reducing the volume of the pole 2 exposed to the outside, making more full use of the space inside the shell 200 of the lithium battery 1000, and improving the utilization rate of the shell 200 space. In some embodiments, the receiving portion 25 is plate-shaped. In order to improve the force strength of the receiving portion 25, the thickness range of the receiving portion 25 can be set to be not less than 0.8mm.

[0037] In some embodiments, a sealing ring 3 is provided between the receiving portion 25 and the pole 2, and the sealing ring 3 plays a role of sealing and isolating the receiving portion 25 and the pole 2 to a certain extent. During use, the sealing ring 3 is placed on the receiving portion 25, and then the pole 2 is placed on the sealing ring 3. The pole 2 is pressed down until the sealing ring 3 is compressed to a certain amount, and then the pole 2 is welded to the cover plate 1.

[0038] The present invention also provides a lithium battery 1000, including a shell 200, a battery cell 300 and the battery top cover 100, wherein the battery top cover 100 also includes an explosion-proof valve assembly 500 and a lower plastic 600 located on the cover plate 1. The internal space of the shell 200 of the lithium battery 1000 of the present application is fully utilized, and the pole 2 on the battery top cover 100 and the pole ear 400 on the battery cell 300 are easy and quick to assemble.

[0039] In the above technical solution, the lithium battery 1000 includes all the technical solutions and beneficial effects of the aforementioned battery top cover 100, which will not be described one by one here.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery top cover, characterized in that: It comprises a cover plate (1) and a pole (2), wherein the pole (2) comprises a pole terminal (21) and a sealing plate (22); A pole terminal (21) connected to the cover plate (1); the pole terminal (21) is provided with a through hole (21d) penetrating along the thickness direction of the cover plate (1); the through hole (21d) comprises a first end (21d') close to the inner surface of the cover plate (1) and a second end (21d") away from the inner surface of the cover plate (1); the pole lug (400) extends from the first end (21d') into the through hole (21d) to be connected to the pole terminal (21); A sealing plate (22) is used to seal the second end portion (21d").

2. The battery top cover according to claim 1, characterized in that: The pole terminal (21) comprises a terminal body (21a) and a bottom flange (21b); A terminal body (21a) connected to the cover plate (1), and the through hole (21d) is provided on the terminal body (21a); The bottom flange (21b) is connected to the terminal body (21a) and is located at the first end (21d') of the through hole (21d). The pole lug (400) is connected to a side of the bottom flange (21b) close to the sealing plate (22).

3. The battery top cover according to claim 1, characterized in that: The pole terminal (21) comprises a terminal body (21a) and a top flange (21c); A terminal body (21a) connected to the cover plate (1), and the through hole (21d) is provided on the terminal body (21a); The top flange (21c) is connected to the terminal body (21a) and is located at the end of the terminal body (21a) away from the cover plate (1), and the sealing plate (22) is connected to the top flange (21c).

4. The battery top cover according to claim 3, characterized in that: The pole terminal (21) further comprises a bottom flange (21b), the bottom flange (21b) being connected to the terminal body (21a) and being located at a first end (21d') of the through hole (21d), and the pole lug (400) being connected to a side of the bottom flange (21b) close to the sealing plate (22); The thickness of the top flange (21c) and the bottom flange (21b) is not less than 0.5 mm.

5. The battery top cover according to claim 1, characterized in that: The pole (2) further comprises a plastic ring (24), wherein the plastic ring (24) is arranged between the pole terminal (21) and the cover plate (1) to separate the pole terminal (21) and the cover plate (1).

6. The battery top cover according to claim 5, characterized in that: The pole (2) further comprises a welding ring (23), wherein the welding ring (23) is arranged between the plastic ring (24) and the cover plate (1) and is used to connect the plastic ring (24) and the cover plate (1).

7. The battery top cover according to claim 1, characterized in that: The cover plate (1) is provided with perforations along its thickness direction; The battery top cover (100) further comprises a receiving portion (25), the receiving portion (25) being located on a side of the cover plate (1) away from the sealing plate (22), the receiving portion (25) being connected to the cover plate (1), and the end of the pole (2) close to the cover plate (1) being located on the receiving portion (25) through the through hole.

8. The battery top cover according to claim 7, characterized in that: A sealing ring (3) is provided between the receiving portion (25) and the pole (2) to isolate the receiving portion (25) from the pole (2).

9. The battery top cover according to claim 7, characterized in that: The receiving portion (25) is a plate-shaped portion, and the thickness of the plate-shaped portion is not less than 0.8 mm.

10. A lithium battery, characterized in that: It comprises a shell (200), a battery cell (300) and a battery top cover (100) as claimed in any one of claims 1 to 9, wherein the battery top cover (100) further comprises an explosion-proof valve assembly (500) and a lower plastic (600) located on the cover plate (1).

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