Pin with unequal wall thickness structure and battery top cover

Abstract

The utility model discloses a pin with an unequal wall thickness structure and a battery top cover with the pin, the pin comprises an adapter plate and a tab plate, the adapter plate and the tab plate are bent and connected, the adapter plate comprises a mounting part and a connecting part, the mounting part and the connecting part are integrated, and the thickness of the mounting part is larger than that of the connecting part. When being connected with the pole column, the pole column is not easy to deform, and the space utilization rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a pin and a battery top cover with an unequal wall thickness structure. Background Art

[0002] A battery is a device that converts chemical energy into electrical energy. It usually includes a battery cell, a pole column, and a pin. The pin is fixed between the battery cell and the pole column, that is, the battery cell and the pole column are electrically connected through the pin to enable the battery to supply power outward through the pole column. The pin is usually an L-shaped connecting piece structure, which includes a transfer board and an ear board arranged perpendicular to each other. The transfer board is attached to the top cover and connected through the pole column. The ear board serves as an ear to connect with the battery cell. There is also a lower plastic between the transfer board and the top cover, and an upper plastic is also provided above the top cover, making the thickness of the battery top cover relatively large. To balance the utilization rate of the internal space of the battery, the transfer board is usually made thinner, that is, the transfer board adopts a thinner plate structure, but this will reduce the strength of the transfer board, causing the transfer board to deform when connected to the pole column, and even break in severe cases. Summary of the Utility Model

[0003] The purpose of the utility model is to design a pin with an unequal wall thickness structure and a battery top cover to solve the above-mentioned technical deficiencies.

[0004] The utility model designs a pin with an unequal wall thickness structure. The pin includes a transfer board and an ear board, and the transfer board and the ear board are bent and connected. The transfer board includes an installation part and a connection part, the installation part and the connection part are integrated, and the thickness dimension of the installation part is greater than that of the connection part.

[0005] Preferably, the top surfaces of the installation part and the connection part are flat surfaces, and a height difference is formed between the bottom surfaces of the installation part and the connection part.

[0006] Further optimized, the bottom surfaces of the installation part and the connection part are connected through a transition part, and the thickness of the transition part shows an increasing trend from the connection part to the installation part.

[0007] The utility model also provides a battery top cover, which includes the pin with the above-mentioned unequal wall thickness structure, and also includes a top cover sheet and a pole column. The pins are located on both sides of the top cover sheet, and the transfer board of the pin is connected to the top cover sheet through the pole column.

[0008] Preferably, a first installation hole for the pole column to pass through is provided on the installation part.

[0009] Further optimized, there is a lower plastic between the top cover sheet and the transfer board. Second installation holes and third installation holes are respectively opened on the top cover sheet and the lower plastic, and the pole column is installed in the first installation hole, the second installation hole, and the third installation hole.

[0010] Further optimization is that a fourth mounting hole for mounting an explosion-proof valve is provided at the central position of the top cover sheet.

[0011] Further optimization is that a liquid injection hole is also provided on the top cover sheet.

[0012] Further optimization is that a positioning hole is provided on the connecting part. The positioning hole is square, and a square protrusion adapted to the positioning hole is provided on the lower plastic.

[0013] The technical effect of the present utility model is that the battery top cover generally mainly includes an upper plastic, a top cover sheet, a lower plastic and pins from top to bottom in sequence. Mounting holes are sequentially provided on the upper plastic, the top cover sheet, the lower plastic and the pins, and then the above components are fixedly connected by mounting the pole columns in the mounting holes. The adapter plate of the pin is attached to the bottom surface of the lower plastic. The front section of the adapter plate is the mounting part, and the rear section is the connecting part. A mounting hole for the pole column to pass through is provided on the mounting part. The connecting part connects the mounting part and the ear plate before and after. The plate thickness of the mounting part is greater than that of the connecting part, and the plates of the mounting part and the connecting part are connected by a transition part. The transition part is integrally designed with the mounting part and the connecting part. The thickness of the transition part gradually decreases from the mounting part to the connecting part, so that the strength of the mounting part can be guaranteed, and it is not easy to deform when connecting the pole column. The thickness of the connecting part is relatively small, and this part improves the space utilization rate of the battery. Due to the smooth gradient trend of the transition part, the risk of stress concentration between the connecting part and the mounting part will not occur. Description of the Drawings

[0014] Figure 1 is the overall structure diagram of the present utility model;

[0015] Figure 2 is the exploded view of the overall structure of the present utility model;

[0016] Figure 3 is the exploded view of the pin and the top cover sheet in the present utility model;

[0017] Figure 4 is the front view of the pin in the present utility model;

[0018] Figure 5 is the exploded view of the pin and the lower plastic in the present utility model.

[0019] In the figure: 1. Pin; 11. Adapter plate; 111. Mounting part; 112. Connecting part; 113. Transition part; 114. First mounting hole; 115. Positioning hole; 12. Ear plate; 2. Top cover sheet; 21. Second mounting hole; 22. Fourth mounting hole; 23. Liquid injection hole; 3. Pole column; 4. Lower plastic; 41. Third mounting hole; 42. Square protrusion; 43. Through hole. Detailed Embodiments

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0021] As Figures 1 to 3 shown, the present utility model provides a pin 1 with an unequal wall thickness structure. The pin 1 includes a transition plate 11 and an ear plate 12. The transition plate 11 and the ear plate 12 are bent and connected. Both the transition plate 11 and the ear plate 12 are rectangular plate-like structures. The bending angle between the transition plate 11 and the ear plate 12 is 90 degrees. The transition plate 11 is used to fit to the bottom surface of the top cover. The transition plate 11 includes an installation portion 111 and a connection portion 112. In this embodiment, the installation portion 111 and the connection portion 112 are integrated, that is, the installation portion 111 and the connection portion 112 are a plate-like structure connected as a whole, which constitutes the transition plate 11. The top surfaces of the installation portion 111 and the connection portion 112 are an integrated flat surface, so that the top surface of the transition plate 11 can be arranged in a fitting manner with the bottom surface of the top cover.

[0022] A height difference is formed between the bottom surfaces of the installation portion 111 and the connection portion 112, so that the thickness dimension of the installation portion 111 is greater than that of the connection portion 112. That is, the bottom surfaces of the installation portion 111 and the connection portion 112 are connected by a smooth transition portion 113. The thickness of the transition portion 113 gradually increases from the connection portion 112 to the installation portion 111. Finally, the overall thickness dimension of the installation portion 111 is greater than the overall thickness dimension of the connection portion 112.

[0023] The present utility model also provides a battery top cover, which includes the pin with the above-mentioned unequal wall thickness structure, and also includes a top cover sheet 2 and a lower plastic 4. The lower plastic 4 is located at the bottom of the top cover sheet 2. The pins 1 are located on both sides of the top cover sheet 2 and at the bottom of the lower plastic 4. The transition plate 11 of the pin 1 is connected to both sides of the top cover sheet 2 through a pole column 3. Specifically, a first installation hole 114 is opened on the installation portion 111, and two second installation holes 21 and third installation holes 41 are respectively opened on the top cover sheet 2 and the lower plastic 4. The first installation hole 114, the second installation hole 21 and the third installation hole 41 on the same side are arranged coaxially. The pole column 3 passes through the second installation hole 21, the third installation hole 41 and the first installation hole 114 on the same side in sequence to connect the top cover sheet 2, the lower plastic 4 and the transition plate 11. In this embodiment, the pole column 3 refers to an electrode assembly, and the electrode assembly is a conventional technology, and its specific structure will not be described in detail.

[0024] The top cover sheet 2 is provided with a fourth mounting hole 22 at the central position. An explosion-proof valve is installed in the fourth mounting hole 22. The explosion-proof valve can be installed in the fourth mounting hole 22 by means of snap connection or bonding. A film is provided on the top of the explosion-proof valve in the fourth mounting hole 22 to encapsulate the fourth mounting hole 22 and the explosion-proof valve.

[0025] The top cover sheet 2 is further provided with a liquid injection hole 23, and the lower plastic 4 is correspondingly provided with a through hole 43 communicating with the liquid injection hole 23, so that the electrolyte is injected into the battery interior from the liquid injection hole 23 and the through hole 43.

[0026] A positioning hole 115 is provided in the connecting portion 112, and a protrusion is provided on the lower plastic 4. When the pin 1 and the lower plastic 4 are fitted together, the protrusion is inserted into the positioning hole 115 to form positioning. Further, the positioning hole 115 is square, and the protrusion is also square. After the protrusion and the positioning hole 115 are inserted, rotation of the pin 1 and the lower plastic 4 centered on the positioning hole 115 is avoided, and the connection between the pin 1 and the lower plastic 4 is stabilized.

[0027] The present utility model is not limited to the above best embodiment. Any person can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as it has a technical solution identical or similar to the present application, it falls within the protection scope of the present utility model.

Claims

1. A pin with unequal wall thickness structure, characterized in that: The pin (1) comprises an adapter plate (11) and a pole ear plate (12); the adapter plate (11) and the pole ear plate (12) are bent and connected; the adapter plate (11) comprises a mounting portion (111) and a connecting portion (112); the mounting portion (111) and the connecting portion (112) are integrated; and the mounting portion (111) has a greater thickness than the connecting portion (112).

2. The pin of the unequal wall thickness structure according to claim 1, characterized in that: The top surfaces of the mounting portion (111) and the connecting portion (112) are flat surfaces, and a height difference is formed between the bottom surfaces of the mounting portion (111) and the connecting portion (112).

3. The pin with unequal wall thickness structure according to claim 2, characterized in that: The bottom surfaces of the mounting portion (111) and the connecting portion (112) are connected via a transition portion (113), and the thickness of the transition portion (113) gradually increases from the connecting portion (112) to the mounting portion (111).

4. A battery top cover, characterized in that: The pin comprises a pin of an unequal wall thickness structure as described in any one of claims 1 to 3, and further comprises a top cover sheet (2) and a pole (3), wherein the pin (1) is located on both sides of the top cover sheet (2), and the adapter plate (11) of the pin (1) is connected to the top cover sheet (2) through the pole (3).

5. A battery top cover according to claim 4, characterized in that: The mounting portion (111) is provided with a first mounting hole (114) for the pole (3) to pass through.

6. A battery top cover according to claim 5, characterized in that: A lower plastic (4) is provided between the top cover sheet (2) and the adapter plate (11); a second mounting hole (21) and a third mounting hole (41) are respectively provided on the top cover sheet (2) and the lower plastic (4); and the pole (3) is installed in the first mounting hole (114), the second mounting hole (21) and the third mounting hole (41).

7. A battery top cover according to claim 4, characterized in that: The top cover sheet (2) is provided with a fourth mounting hole (22) at a central position for mounting an explosion-proof valve.

8. A battery top cover according to claim 7, characterized in that: The top cover sheet (2) is also provided with a liquid injection hole (23).

9. A battery top cover according to claim 8, characterized in that: The connection portion (112) is provided with a positioning hole (115), the positioning hole (115) is square, and the lower plastic (4) is provided with a square protrusion (42) adapted to the positioning hole (115).

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