Battery top cover waterproof structure

Abstract

The utility model relates to battery top cover technical field, concretely is a kind of battery top cover waterproof structure, including top cover body, the top cover body is close to the centre and is equipped with liquid injection hole, the top of top cover body is close to the fixedly connected with vertical rod of liquid injection hole, vertical rod outer surface is sleeved with torsion spring, the both ends of torsion spring are fixedly connected with connecting plate, two the connecting plate is rotatably connected with vertical rod, the side of connecting plate away from torsion spring is rotatably connected with half cylinder. The utility model, when using, need to insert liquid injection tube, press, liquid injection tube is aligned with the half taper groove of resistance block and presses, liquid injection tube bottom contacts half taper groove slope, extrude resistance block in the process of pressing so that two resistance blocks separate, torsion spring deformation, continuously press liquid injection tube, until completely inserted two resistance blocks final insertion liquid injection hole, when pulling away liquid injection tube, two resistance blocks are reset under the action of torsion spring and tightly resist, guarantee liquid injection hole sealing, to reach the effect of waterproof while liquid injection operation is convenient.

Description

Technical Field

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

[0002] The battery top cover is a key component of the battery. Located on top of the battery, it acts like a "lid," sealing the battery and protecting the internal electrochemical system (cells, electrolyte, etc.). It can resist external physical impacts and prevent water, dust, and other contaminants from entering. At the same time, it provides a mechanical and electrical interface between the battery and external circuits and devices, allowing the battery to output or input electrical energy. The waterproof structure of the battery top cover refers to the sealed protective structure designed to prevent external moisture from entering the battery, ensuring the safe operation and stable electrical performance of the battery.

[0003] A search revealed a battery top cover structure and battery disclosed in Chinese utility model patent publication number CN222826500U. The battery top cover structure includes a top cover sheet and a positive electrode post. The top of the top cover sheet is recessed downwards to form a positive electrode mounting groove. A positive electrode boss is formed on the outer periphery of the positive electrode post, which is embedded in the positive electrode mounting groove. The positive electrode post is electrically connected to the top cover sheet. The positive electrode boss, embedded in the positive electrode mounting groove, electrically connects the positive electrode post to the top cover sheet. When processing the positive electrode post, it can be directly manufactured by pressing, saving material costs and improving production efficiency. It also eliminates the traditional upper plastic part, reducing material costs, simplifying assembly steps, and improving production efficiency.

[0004] However, the device lacks the function of flexibly sealing the injection hole. In use, the traditional method is to use laser welding or glue to seal the injection hole with a rubber plug. The sealing structure needs to be removed before injection, and then the sealing is repeated. The operation is complicated and not convenient. Utility Model Content

[0005] The purpose of this invention is to provide a waterproof battery top cover structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A waterproof battery top cover structure includes a top cover body with an injection hole near its center. A vertical rod is fixedly connected to the top of the top cover body near the injection hole. A torsion spring is sleeved on the outer surface of the vertical rod. Connecting plates are fixedly connected to both ends of the torsion spring. Both connecting plates are rotatably connected to the vertical rod. A half-cylinder is rotatably connected to the side of the connecting plate away from the torsion spring. The two half-cylinders are rotatably connected by a pin. A stop block is fixedly connected to the inner wall of the half-cylinder.

[0008] Preferably, a rotating rod is fixedly connected to the outer surface of the connecting plate away from the torsion spring, and a half-cylinder is rotatably connected to the outer surface of the rotating rod.

[0009] Preferably, the abutment block has a semi-conical groove, and two semi-conical grooves are combined to form a cone shape.

[0010] Preferably, a negative electrode post is fixedly connected to the top of the top cover body near the injection hole, and a positive electrode post is fixedly connected to the top of the top cover body away from the negative electrode post. A convex ring is fixedly connected to the top of the top cover body near both the positive and negative electrode posts. A convex cap is threaded to the outer surface of the convex ring. A circular groove is formed at the center of the convex cap, and a silicone sheet is fixedly connected to the inner wall of the circular groove.

[0011] Preferably, a sealing ring is fixedly connected to the top of the top cover body near the top of the half cylinder, and the outer surface of the sealing ring abuts against the inner wall of the half cylinder.

[0012] Preferably, the top of the sealing ring abuts against a sealing sheet, and the inner wall of the semi-cylinder is fixedly connected to the sealing sheet.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This waterproof battery top cover structure, through the arrangement of abutments, a semi-conical groove, a semi-cylinder, and a torsion spring, allows for easy insertion of the injection tube. When the injection tube needs to be inserted, it is aligned with the semi-conical groove of the abutment and pressed down. The bottom of the injection tube contacts the inclined surface of the semi-conical groove. During pressing, the abutments are squeezed, causing them to separate and the torsion spring to deform. The injection tube is continuously pressed until it is fully inserted between the two abutments and finally into the injection hole. When the injection tube is withdrawn, the torsion spring causes the two abutments to return to their original positions and tighten, ensuring a seal on the injection hole. This achieves both waterproofing and convenient injection operation.

[0015] 2. This waterproof battery top cover structure, through the arrangement of a convex ring, a convex cover, a circular groove and a silicone sheet, allows for the following operation: the two convex covers are tightened onto the convex ring, the wire is inserted into the circular groove at the top of the convex cover and then connected to the terminal post. During the insertion process, the silicone sheet bends inward toward the convex cover and adheres tightly to the surface of the wire, ensuring a seal while supporting the wire and preventing poor contact at the contact point due to long-term wire misalignment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This is a schematic diagram showing the disassembled half-cylinder and rotating rod of this utility model;

[0018] Figure 3 This is a schematic diagram showing the installation of the half-cylinder and sealing plate of this utility model;

[0019] Figure 4This is a schematic diagram showing the disassembled convex ring and convex cap of this utility model.

[0020] In the diagram: 1. Top cover body; 2. Injection hole; 3. Upright rod; 4. Torsion spring; 5. Connecting plate; 6. Half cylinder; 7. Pin; 8. Abutment block; 9. Rotating rod; 10. Semi-conical groove; 11. Negative electrode post; 12. Positive electrode post; 13. Convex ring; 14. Convex cover; 15. Circular groove; 16. Silicone sheet; 17. Sealing ring; 18. Sealing plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0023] A waterproof battery top cover structure includes a top cover body 1. An injection hole 2 is provided near the center of the top cover body 1. A support rod 3 is fixedly connected to the top of the top cover body 1 near the injection hole 2. A torsion spring 4 is sleeved on the outer surface of the support rod 3. Connecting plates 5 are fixedly connected to both ends of the torsion spring 4. Both connecting plates 5 are rotatably connected to the support rod 3. A semi-cylinder 6 is rotatably connected to the side of the connecting plate 5 away from the torsion spring 4. The two semi-cylinders 6 are rotatably connected by a pin 7. A stop block 8 is fixedly connected to the inner wall of the semi-cylinder 6. In use, when an injection tube needs to be inserted, the injection tube is aligned with the semi-conical groove 10 of the stop block 8 and pressed down. The bottom of the injection tube contacts the inclined surface of the semi-conical groove 10. During the pressing process, the stop block 8 is compressed, causing the two stop blocks 8 to... When the injection tube is separated, the torsion spring 4 deforms, and the connecting plate 5 rotates between the abutment block 8. The injection tube is continuously pressed until it is fully inserted between the two abutment blocks 8 and finally inserted into the injection hole 2. When the injection tube is pulled out, the two abutment blocks 8 return to their original positions and tighten under the action of the torsion spring 4, ensuring the injection hole 2 is sealed, thus achieving the effect of waterproofing and convenient injection operation. The two abutment blocks 8 are connected by a pin 7, specifically near the column. When the injection tube is inserted, the torsion spring 4 deforms, which will drive the two abutment blocks 8 to rotate around the central axis of the pin 7, that is, to present an open shape. When the injection tube is pulled out, the two abutment blocks 8 cooperate with the half cylinder 6 to tighten under the action of the torsion spring 4, ensuring the sealing around the injection hole 2, waterproofing and dustproofing, and simple operation.

[0024] In this embodiment, preferably, a rotating rod 9 is fixedly connected to the outer surface of the connecting plate 5 away from the torsion spring 4, and a half-cylinder 6 is rotatably connected to the outer surface of the rotating rod 9. In use, when the injection tube is inserted, the two abutments 8 open, causing the rotating rod 9 to rotate inside the half-cylinder 6, and at the same time causing the two connecting plates 5 to open, thereby causing the torsion spring 4 to deform. The rotating rod 9 is inserted inside the half-cylinder 6, specifically located near the connecting plate 5, so as not to hinder the rotation of the half-cylinder 6, while driving the connecting plate 5 to move, thereby causing the torsion spring 4 to deform.

[0025] In this embodiment, preferably, the abutment block 8 has a semi-conical groove 10, and the two semi-conical grooves 10 are combined to form a cone. When it is needed to insert the injection tube, the injection tube is aligned with the semi-conical groove 10 of the abutment block 8 and pressed. The bottom of the injection tube contacts the inclined surface of the semi-conical groove 10. During the pressing process, the abutment block 8 is squeezed to separate the two abutment blocks 8, and the torsion spring 4 is deformed. The injection tube is continuously pressed until it is fully inserted between the two abutment blocks 8 and finally inserted into the injection hole 2. In this cone shape, when the injection tube is inserted, the bottom of the injection tube contacts and squeezes the inclined surface of the two semi-conical grooves 10, thereby separating the two abutment blocks 8. Therefore, when injection is needed, there is no need to disassemble the sealing and waterproof structure and then install the sealing and waterproof components after injection. It can be done simply by pressing and pulling out, which is easy to operate.

[0026] In this embodiment, preferably, a negative electrode post 11 is fixedly connected to the top of the top cover body 1 near the injection hole 2, and a positive electrode post 12 is fixedly connected to the top of the top cover body 1 away from the negative electrode post 11. A convex ring 13 is fixedly connected to the top of both the positive and negative electrode posts 11. A convex cap 14 is threaded onto the outer surface of the convex ring 13. A circular groove 15 is formed at the center of the convex cap 14, and a silicone sheet 16 is fixedly connected to the inner wall of the circular groove 15. In use, the two convex caps 14 are tightened onto the convex rings 13, and the wire is inserted into the circular groove at the top of the convex cap 14. The groove 15 is then connected to the terminal post. During insertion, the silicone sheet 16 bends inward toward the inside of the convex cap 14 while adhering tightly to the surface of the wire, ensuring a seal while supporting the wire and preventing poor contact at the contact point due to long-term wire misalignment. The silicone sheet 16 is made of soft silicone. When the wire is inserted, the silicone sheet 16 deforms but always adheres to the surface of the wire. Since the diameter of the circular groove 15 is the same as the length of the terminal post, the silicone sheet 16 and the top of the convex cap 14 are ultimately perpendicular. The wire is tightly abutted against the edge of the circular groove 15 at the top of the convex cap 14, ensuring that the wire does not tilt.

[0027] In this embodiment, preferably, a sealing ring 17 is fixedly connected to the top of the top cover body 1 near the top of the half-cylinder 6. The outer surface of the sealing ring 17 abuts against the inner wall of the half-cylinder 6. During use, after the liquid injection is completed, the two abutting blocks 8 return to their positions and abut against each other. At the same time, the inner walls of the two half-cylinders 6 also abut against the sealing ring 17, thereby ensuring the sealing between the bottom of the half-cylinder 6 and the top cover body 1. The sealing ring 17 has a stepped cross-section. Its bottom is fixedly connected to the top cover body 1, and its outer surface abuts against the inner walls of the two half-cylinders 6. Therefore, the movement of the half-cylinder 6 during liquid injection will not be affected by the sealing ring 17. When the two half-cylinders 6 abut against each other after the liquid injection is completed, they also abut against the sealing ring 17, ensuring the sealing.

[0028] In this embodiment, preferably, the top of the sealing ring 17 abuts against the sealing sheet 18, and the inner walls of the half-cylinder 6 are all fixedly connected to the sealing sheet 18. In use, the bottom of the sealing sheet 18 abuts against the sealing ring 17, and the outer surface is fixedly connected to the inner walls of the two half-cylinders 6. When the two half-cylinders 6 rotate relative to each other, the sealing sheet 18 deforms to ensure the sealing of the rotating part. Since the two half-cylinders 6 are rotatably connected by the pin 7, this part is prone to poor sealing. Adding the sealing sheet 18 to the inner wall of the half-cylinder 6 enhances the sealing at this point, which is beneficial to ensuring the overall sealing of the waterproof structure.

[0029] Working principle: In this embodiment of the waterproof battery top cover structure, when it is necessary to insert the liquid injection tube, the liquid injection tube is aligned with the semi-conical groove 10 of the abutment block 8 and pressed down. The bottom of the liquid injection tube contacts the inclined surface of the semi-conical groove 10. During the pressing process, the abutment block 8 is squeezed, causing the two abutment blocks 8 to separate. The torsion spring 4 deforms. The liquid injection tube is continuously pressed until it is fully inserted between the two abutment blocks 8 and finally inserted into the liquid injection hole 2. When the liquid injection tube is pulled out, the two abutment blocks 8 return to their original positions and tighten under the action of the torsion spring 4, ensuring the liquid injection hole 2 is sealed. This achieves the effect of waterproofing and convenient liquid injection operation. The two convex caps 14 are tightened onto the convex ring 13. The wire is inserted into the round groove 15 at the top of the convex cap 14 and then connected to the terminal post. During the insertion process, the silicone sheet 16 bends inward toward the convex cap 14 and adheres tightly to the surface of the wire, ensuring the seal while supporting the wire and avoiding poor contact at the contact point due to long-term wire misalignment.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A waterproof structure for a battery top cover, characterized in that: The device includes a top cover body (1), which has an injection hole (2) near its center. A vertical rod (3) is fixedly connected to the top of the top cover body (1) near the injection hole (2). A torsion spring (4) is sleeved on the outer surface of the vertical rod (3). A connecting plate (5) is fixedly connected to both ends of the torsion spring (4). Both connecting plates (5) are rotatably connected to the vertical rod (3). A half cylinder (6) is rotatably connected to the side of the connecting plate (5) away from the torsion spring (4). The two half cylinders (6) are rotatably connected by a pin (7). A stop block (8) is fixedly connected to the inner wall of the half cylinder (6).

2. The waterproof battery top cover structure according to claim 1, characterized in that: A rotating rod (9) is fixedly connected to the outer surface of the connecting plate (5) away from the torsion spring (4), and a half cylinder (6) is rotatably connected to the outer surface of the rotating rod (9).

3. The waterproof battery top cover structure according to claim 1, characterized in that: The abutment block (8) has a semi-conical groove (10), and the two semi-conical grooves (10) are combined to form a cone.

4. The waterproof structure for a battery top cover according to claim 1, characterized in that: The top cover body (1) is fixedly connected to a negative electrode post (11) near the injection hole (2), and the top cover body (1) is fixedly connected to a positive electrode post (12) away from the negative electrode post (11). The top cover body (1) is fixedly connected to both the positive electrode post (12) and the negative electrode post (11) with a convex ring (13). The outer surface of the convex ring (13) is threaded with a convex cap (14). A circular groove (15) is opened at the center of the convex cap (14). A silicone sheet (16) is fixedly connected to the inner wall of the circular groove (15).

5. The waterproof structure for a battery top cover according to claim 1, characterized in that: The top cover body (1) is fixedly connected to a sealing ring (17) near the top of the half cylinder (6), and the outer surface of the sealing ring (17) abuts against the inner wall of the half cylinder (6).

6. The waterproof structure for a battery top cover according to claim 5, characterized in that: The top of the sealing ring (17) abuts against the sealing sheet (18), and the inner wall of the half cylinder (6) is fixedly connected to the sealing sheet (18).

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