Novel battery top cover

Abstract

The utility model relates to the technical field of battery top covers, and provides a novel battery top cover, which comprises a light aluminum plate, upper plastic, lower plastic, a pole and a pin, the upper plastic and the lower plastic are respectively arranged on two opposite sides of the light aluminum plate; the pin is arranged on one side, far away from the optical aluminum plate, of the lower plastic, the pole is arranged on the upper plastic, the pole penetrates through the upper plastic, the lower plastic and the pin, and a first penetrating hole for the pole to penetrate through is formed in the pin. According to the top cover, the pole is fixed through laser welding after directly penetrating through the upper plastic, the light aluminum plate, the lower plastic and the pins, the number of manufacturing procedures is small, the number of structural parts is small, the manufacturing cost of the top cover is greatly reduced, meanwhile, the end of the pole is arranged to be pressed and pressed on the inner side of the welding groove, and the reliability of the top cover is improved. The pole can be effectively prevented from being separated from the pin under the limiting of the end part of the pole, the stability of the welding connection between the pole and the pin is improved, and the use is convenient.

Description

A new type of battery top cover Technical Field

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

[0002] The top cover of a lithium battery is an important component of the lithium-ion battery structure. It is mainly used to seal the inside of the battery, ensuring the stability of the electrolyte and internal active materials, while also providing safety protection.

[0003] Utility model patent CN208690313U discloses a power battery top cover, comprising a battery top cover for sealing the inside of the battery and a first battery terminal and a second battery terminal respectively fixed to both sides of the battery top cover. The battery top cover has a vent valve for protecting the battery and a liquid injection hole for injecting liquid. The vent valve and the liquid injection hole are located between the first and second battery terminals on both sides and are arranged in a direction perpendicular to the first battery terminal to the second battery terminal. However, conventional battery top covers often connect the terminals to the leads by bonding and welding. This means that even under great force after welding, the terminals may still detach from the top cover, leading to connection failure. Therefore, this solution proposes a novel battery top cover to solve the above problems. Summary of the Invention

[0004] In view of this, this utility model proposes a novel battery top cover to solve the technical problem that, even after welding, the electrode may still detach from the top cover under certain stress, leading to abnormal connection.

[0005] The technical solution of this utility model is achieved as follows: This utility model provides a novel battery top cover, comprising a light aluminum plate, an upper plastic layer, a lower plastic layer, electrode posts, and leads, wherein...

[0006] The aluminum plate has upper and lower plastic sheets on opposite sides.

[0007] The pin is located on the side of the lower plastic away from the aluminum plate, the electrode is located on the upper plastic and passes through the upper plastic, the lower plastic and the pin, the pin has a first through hole for the electrode to pass through, and the pin has a solder groove, the first through hole is located inside the solder groove, and the end of the electrode is located inside the solder groove.

[0008] Based on the above technical solutions, preferably, the pole includes an upper connecting part and a lower inserting part, the upper plastic has a second through hole for the lower inserting part to pass through, and the upper plastic has a first inserting groove, the second through hole is opened inside the first inserting groove, and the upper connecting part is inserted into the inside of the first inserting groove.

[0009] Based on the above technical solutions, preferably, the aluminum plate has a third through hole for the pole post to pass through, and the aluminum plate has a second insertion groove, with the upper plastic inserting into the inner side of the second insertion groove.

[0010] Based on the above technical solutions, preferably, the upper plastic is provided with a first positioning protrusion, and the interior of the second insertion groove is provided with a positioning slot for the first positioning protrusion to be inserted.

[0011] Based on the above technical solution, preferably, the number of the first positioning protrusions is two, and the two first positioning protrusions are respectively located at two opposite corners of the upper plastic.

[0012] Based on the above technical solutions, preferably, the lower plastic is provided with a fourth through hole for the pole post to pass through, and the lower plastic is provided with a third insertion groove. The fourth through hole is opened inside the third insertion groove. The aluminum plate is provided with a second positioning protrusion on the side corresponding to the lower plastic, and the second positioning protrusion is inserted into the inner side of the third insertion groove.

[0013] Based on the above technical solutions, a preferred embodiment also includes a sealing ring, wherein...

[0014] A sealing ring is disposed on the aluminum plate and is sealed and fitted to the pole post.

[0015] Based on the above technical solutions, preferably, the sealing ring includes an upper ring body and a lower ring body, wherein,

[0016] The upper ring body is located inside the second insertion slot and passes through the second through hole. The lower ring body passes through the third through hole. The upper ring body is sealed and fitted with the upper connecting part, and the lower ring body is sealed and fitted with the lower insertion part.

[0017] Based on the above technical solutions, a preferred embodiment further includes a third positioning protrusion, wherein...

[0018] A third positioning protrusion is provided on the lower plastic, and a positioning hole is provided on the pin for the third positioning protrusion to pass through.

[0019] Based on the above technical solutions, a preferred embodiment further includes reinforcing ribs, wherein...

[0020] A reinforcing rib is provided on the lower plastic, and the reinforcing rib includes horizontal ribs and vertical ribs that are perpendicularly connected to each other.

[0021] The novel battery top cover of this utility model has the following advantages over the prior art:

[0022] (1) By setting the pole to pass directly through the upper plastic, the aluminum plate, the lower plastic and the pin and then fixing it by laser welding, the manufacturing process is reduced and the number of structural parts is also reduced, which greatly reduces the manufacturing cost of the top cover. At the same time, by setting the end of the pole to be pressed and tightened on the inside of the welding groove, the pole can be effectively prevented from detaching from the pin under the end limit of the pole, which increases the stability of the welding connection between the pole and the pin and facilitates use.

[0023] (2) By setting the pole post to include an upper connecting part and a lower inserting part, and opening a first inserting groove on the upper plastic for the upper connecting part to be inserted, after the pole post is connected, the groove wall of the first inserting groove can block and limit the upper connecting part, thereby increasing the connection stability of the pole post of this application and making it convenient to use. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a frontal perspective view of the novel battery top cover of this utility model;

[0026] Figure 2 is a bottom perspective view of the novel battery top cover of this utility model;

[0027] Figure 3 is a left view of the novel battery top cover of this utility model;

[0028] Figure 4 is a cross-sectional view of the structure at point AA shown in Figure 3 of the novel battery top cover of this utility model.

[0029] Figure 5 is an enlarged schematic diagram of section B shown in Figure 4 of the novel battery top cover of this utility model;

[0030] Figure 6 is an exploded view of the novel battery top cover of this utility model;

[0031] Figure 7 is a bottom perspective view of the plastic top cover of the novel battery of this utility model.

[0032] Figure 8 is a bottom-view perspective view of the aluminum plate of the novel battery top cover of this utility model.

[0033] In the diagram: 1. Aluminum plate; 11. Third through hole; 12. Second insertion slot; 13. Positioning slot; 14. Second positioning protrusion; 2. Upper plastic; 21. Second through hole; 22. First insertion slot; 23. First positioning protrusion; 3. Lower plastic; 31. Fourth through hole; 32. Third insertion slot; 4. Pole post; 41. Upper connecting part; 42. Lower insertion part; 5. Pin; 51. First through hole; 52. Welding groove; 53. Positioning hole; 6. Sealing ring; 61. Upper ring body; 62. Lower ring body; 7. Third positioning protrusion; 8. Reinforcing rib; 81. Horizontal rib; 82. Vertical rib. Detailed Implementation

[0034] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0035] As shown in Figures 1-8, the novel battery top cover of this utility model is characterized by comprising an aluminum plate 1, an upper plastic 2, a lower plastic 3, a terminal post 4, and a lead 5. The upper plastic 2 and the lower plastic 3 are respectively provided on opposite sides of the aluminum plate 1. The lead 5 is provided on the side of the lower plastic 3 away from the aluminum plate 1. The terminal post 4 is provided on the upper plastic 2 and passes through the upper plastic 2, the lower plastic 3, and the lead 5. A first through hole 51 for the terminal post 4 to pass through is provided on the lead 5, and a welding groove 52 is provided on the lead 5. The first through hole 51 is provided inside the welding groove 52, and the end of the terminal post 4 is located inside the welding groove 52.

[0036] In practice, the electrode post 4 passes directly through the upper plastic 2, the aluminum plate 1, the lower plastic 3, and the pin 5. At this point, the end of the electrode post 4 is located inside the welding groove 52. The end of the electrode post 4 is then pressed into the welding groove 52 using a press-fitting method. Laser welding is then used to complete the welding connection between the electrode post 4 and the pin 5. Because the electrode post 4 passes directly through the upper plastic 2, the aluminum plate 1, the lower plastic 3, and the pin 5 and is then fixed by laser welding, the manufacturing process is simplified, and the number of structural parts is reduced, significantly lowering the manufacturing cost of the top cover. Simultaneously, by pressing the end of the electrode post 4 into the welding groove 52, the end of the electrode post 4 is effectively prevented from detaching from the pin 5, increasing the stability of the welding connection between the electrode post 4 and the pin 5 and facilitating use.

[0037] In a preferred embodiment, the pole post 4 includes an upper connecting part 41 and a lower insertion part 42. The upper plastic 2 has a second through hole 21 for the lower insertion part 42 to pass through, and the upper plastic 2 has a first insertion groove 22. The second through hole 21 is opened inside the first insertion groove 22, and the upper connecting part 41 is inserted into the inside of the first insertion groove 22.

[0038] By setting the pole post 4 to include an upper connecting part 41 and a lower inserting part 42, and providing a first inserting groove 22 on the upper plastic 2 for the upper connecting part 41 to be inserted, after the pole post 4 is connected, the groove wall of the first inserting groove 22 can block and limit the upper connecting part 41, thereby increasing the connection stability of the pole post 4 of this application and making it convenient to use.

[0039] The aluminum plate 1 has a third through hole 11 for the pole post 4 to pass through, and the aluminum plate 1 has a second insertion groove 12, with the upper plastic 2 inserted into the inner side of the second insertion groove 12.

[0040] This design allows the upper plastic 2 to be inserted into the inner side of the second insertion slot 12 when connecting the upper plastic 2 and the aluminum plate 1, thereby increasing the connection stability between the upper plastic 2 and the aluminum plate 1.

[0041] The upper plastic 2 is provided with a first positioning protrusion 23, and the interior of the second insertion groove 12 is provided with a positioning slot 13 for the first positioning protrusion 23 to be inserted.

[0042] There are two first positioning protrusions 23, and the two first positioning protrusions 23 are respectively located at two opposite corners of the upper plastic 2.

[0043] By providing a first positioning protrusion 23 on the upper plastic 2, when connecting the upper plastic 2 and the aluminum plate 1, the first positioning protrusion 23 is simultaneously inserted into the positioning slot 13. Under the constraint of the first positioning protrusion 23, the torsional resistance of the upper plastic 2 after connection can be increased.

[0044] The lower plastic 3 has a fourth through hole 31 for the pole post 4 to pass through, and a third insertion groove 32 is provided on the lower plastic 3. The fourth through hole 31 is located inside the third insertion groove 32. The aluminum plate 1 is provided with a second positioning protrusion 14 on one side of the lower plastic 3. The second positioning protrusion 14 is inserted into the inside of the third insertion groove 32.

[0045] In practice, the shape of the second positioning protrusion 14 is adapted to the shape of the second insertion groove 12. When connecting the lower plastic 3 and the aluminum plate 1, the second positioning protrusion 14 is inserted into the interior of the third insertion groove 32. Under the restriction of the groove wall of the third insertion groove 32, the connection stability between the lower plastic 3 and the aluminum plate 1 is increased.

[0046] As a preferred embodiment, a sealing ring 6 is also included, wherein the sealing ring 6 is disposed on the aluminum plate 1 and is sealed and fitted to the pole post 4.

[0047] The sealing ring 6 includes an upper ring body 61 and a lower ring body 62. The upper ring body 61 is located inside the second insertion groove 12 and passes through the second through hole 21. The lower ring body 62 passes through the third through hole 11. The upper ring body 61 is sealed and fitted with the upper connecting part 41, and the lower ring body 62 is sealed and fitted with the lower insertion part 42.

[0048] In specific implementation, both the upper ring body 61 and the lower ring body 62 are circular. The upper ring body 61 and the lower ring body 62 are respectively sealed and fitted with the upper connecting part 41 and the lower insertion part 42 to improve the connection sealing of the pole post 4 of this application, and at the same time, the sealing ring 6 is not easy to fall off.

[0049] In a preferred embodiment, a third positioning protrusion 7 is also included, wherein the third positioning protrusion 7 is disposed on the lower plastic 3, and a positioning hole 53 is provided on the pin 5 for the third positioning protrusion 7 to pass through.

[0050] With this design, when assembling the lower plastic 3 and the pin 5, the third positioning protrusion 7 is inserted into the inside of the positioning hole 53 to position the connection position of the pin 5, and at the same time increases the connection stability between the pin 5 and the lower plastic 3.

[0051] In a preferred embodiment, a reinforcing rib 8 is also included, wherein the reinforcing rib 8 is disposed on the lower plastic 3, and the reinforcing rib 8 includes horizontal ribs 81 and vertical ribs 82 that are perpendicularly connected to each other.

[0052] This design is used to increase the structural strength of the lower plastic 3. In the specific implementation, the reinforcing rib 8 is set on one side of the fourth through hole 31.

[0053] It should be noted that the upper plastic 2 and the second positioning protrusion 14 in this application are both square. The pin 5 is L-shaped and includes two square plates.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel battery top cover, characterized in that: The assembly includes an aluminum plate (1), an upper plastic (2), a lower plastic (3), a pole (4), and a pin (5). The upper plastic (2) and the lower plastic (3) are respectively provided on opposite sides of the aluminum plate (1). The pin (5) is located on the side of the lower plastic (3) away from the aluminum plate (1). The pole (4) is located on the upper plastic (2) and passes through the upper plastic (2), the lower plastic (3), and the pin (5). The pin (5) has a first through hole (51) for the pole (4) to pass through, and a welding groove (52) is provided on the pin (5). The first through hole (51) is located inside the welding groove (52), and the end of the pole (4) is located inside the welding groove (52).

2. The novel battery top cover as described in claim 1, characterized in that: The pole post (4) includes an upper connecting part (41) and a lower insert part (42). The upper plastic (2) has a second through hole (21) for the lower insert part (42) to pass through, and the upper plastic (2) has a first insert groove (22). The second through hole (21) is opened inside the first insert groove (22), and the upper connecting part (41) is inserted into the inside of the first insert groove (22).

3. The novel battery top cover as described in claim 2, characterized in that: The aluminum plate (1) has a third through hole (11) for the pole post (4) to pass through, and the aluminum plate (1) has a second insertion groove (12), and the upper plastic (2) is inserted into the inner side of the second insertion groove (12).

4. The novel battery top cover as described in claim 3, characterized in that: The upper plastic (2) is provided with a first positioning protrusion (23), and the interior of the second insertion groove (12) is provided with a positioning slot (13) for the first positioning protrusion (23) to be inserted.

5. The novel battery top cover as described in claim 4, characterized in that: There are two first positioning protrusions (23), and the two first positioning protrusions (23) are respectively located at two opposite corners of the upper plastic (2).

6. The novel battery top cover as described in claim 1, characterized in that: The lower plastic (3) has a fourth through hole (31) for the pole post (4) to pass through, and the lower plastic (3) has a third insertion groove (32). The fourth through hole (31) is located inside the third insertion groove (32). The light aluminum plate (1) has a second positioning protrusion (14) on one side corresponding to the lower plastic (3). The second positioning protrusion (14) is inserted into the inner side of the third insertion groove (32).

7. The novel battery top cover as described in claim 3, characterized in that: It also includes a sealing ring (6), wherein the sealing ring (6) is disposed on the light aluminum plate (1) and is sealed and fitted to the pole post (4).

8. The novel battery top cover as described in claim 7, characterized in that: The sealing ring (6) includes an upper ring body (61) and a lower ring body (62). The upper ring body (61) is located inside the second insertion groove (12) and passes through the second through hole (21). The lower ring body (62) passes through the third through hole (11). The upper ring body (61) is sealed and fitted with the upper connecting part (41), and the lower ring body (62) is sealed and fitted with the lower insertion part (42).

9. The novel battery top cover as described in claim 1, characterized in that: It also includes a third positioning protrusion (7), wherein the third positioning protrusion (7) is disposed on the lower plastic (3), and the pin (5) has a positioning hole (53) through which the third positioning protrusion (7) passes.

10. The novel battery top cover as described in claim 1, characterized in that: It also includes reinforcing ribs (8), wherein the reinforcing ribs (8) are disposed on the lower plastic (3), and the reinforcing ribs (8) include horizontal ribs (81) and vertical ribs (82) that are perpendicularly connected to each other.

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