Battery terminal sealing device

Abstract

The utility model relates to the technical field of battery sealing, in particular to a battery terminal sealing device, which can effectively improve the dustproof, waterproof and insulating properties of a battery. The utility model provides a battery terminal sealing device which comprises an insulating shell and a terminal assembly penetrating through the insulating shell, a battery cover plate is buckled on the top of the insulating shell, and an annular sealing groove is formed in the connecting position of the top of the inner wall of the insulating shell and the battery cover plate. A first sealing piece propped against the battery cover plate is embedded in the annular sealing groove; the terminal assembly comprises a conductive bolt and a matched compression nut, the bottom of the conductive bolt is provided with external threads, and the middle of the conductive bolt is provided with a radial flange; the outer side edge of the battery cover plate extends downwards to wrap the joint of the insulating shell, a sealing table is arranged at the position, located on the outer side of the battery cover plate, of the insulating shell, and the outer side edge of the battery cover plate and the sealing table are buckled to form a filling space of the second sealing piece.

Description

A battery terminal sealing device Technical Field

[0001] This utility model relates to the field of battery sealing technology, specifically to a battery terminal sealing device that can effectively improve the dustproof, waterproof and insulation performance of batteries. Background Technology

[0002] Battery terminals are key components connecting the battery to external circuits. They typically consist of conductive bolts and clamping nuts, used to transmit electrical energy and provide a stable electrical connection. In applications such as power batteries and energy storage batteries, the reliability and sealing of the terminals directly affect the battery's safety and lifespan.

[0003] Traditional battery terminal sealing methods typically employ a single rubber ring or potting compound, but these are prone to aging, cracking, or seal failure after prolonged use. Furthermore, due to the complex operating environment of batteries (such as vibration and temperature variations), the sealing structure is susceptible to loosening, leading to electrolyte leakage or external moisture intrusion, which can cause short circuits, corrosion, and other safety hazards. Therefore, there is an urgent need for a battery terminal sealing device with a more reliable structure and superior sealing performance. Summary of the Invention

[0004] The purpose of this invention is to provide a battery terminal sealing device that improves sealing reliability and durability through a dual sealing structure (first sealing element and second sealing element) combined with an optimized insulating shell.

[0005] To solve the above-mentioned technical problems, the present invention provides a battery terminal sealing device, comprising an insulating shell and a terminal assembly that penetrates the insulating shell. A battery cover is fastened to the top of the insulating shell. An annular sealing groove is provided between the top of the inner wall of the insulating shell and the connection between the battery cover and the annular sealing groove, and a first sealing element that abuts against the battery cover is embedded in the annular sealing groove. The terminal assembly includes a conductive bolt with external threads at the bottom and a matching clamping nut. A radial flange is provided in the middle of the conductive bolt. The outer edge of the battery cover extends downward to cover the joint of the insulating shell, and a sealing platform is provided on the outer side of the insulating shell located on the battery cover. The outer edge of the battery cover and the sealing platform are fastened together to form a filling space for the second sealing element.

[0006] As a preferred technical solution of this utility model, the outer surface of the insulating shell is provided with multiple annular heat dissipation fins, and the spacing between the fins decreases in a gradient from bottom to top.

[0007] As a preferred technical solution of this utility model, the first sealing element is a shaped sealing ring made of fluororubber, with a bi-peak structure in its cross-section, and the distance between the bi-peaks and the width of the annular sealing groove form an interference fit.

[0008] As a preferred embodiment of this utility model, the lower end face of the radial flange abuts against the upper end face of the battery cover, and the lower surface of the radial flange is provided with radially distributed anti-slip textures. The outer side of the radial flange is sealed to the battery cover through an insulating layer.

[0009] As a preferred embodiment of this invention, the insulating layer is a two-component epoxy resin adhesive that is cast and sealed.

[0010] As a preferred embodiment of this utility model, the insulating shell is provided with an injection channel on the side above the injection space of the second sealing element, and the injection channel includes an inclined guide section and a vertical molding section.

[0011] As a preferred technical solution of this utility model, the second sealing element is a two-component epoxy resin adhesive, which, after curing, forms a covering structure that conforms to the outer surface of the insulating shell and the terminal assembly.

[0012] As a preferred embodiment of this utility model, the conductive bolt is provided with an anti-rotation protrusion at the insertion point between the radial flange and the insulating shell, and the height of the anti-rotation protrusion is 1 / 5 to 1 / 3 of the bolt diameter.

[0013] As a preferred technical solution of this utility model, the clamping nut and the bottom of the battery cover are provided with an elastic washer, which is made of copper-clad graphite composite material with a thickness of 1.5-2mm.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. This battery terminal sealing device effectively prevents electrolyte leakage and external moisture intrusion through the synergistic action of the first sealing element (fluororubber ring) and the second sealing element (epoxy resin potting);

[0016] 2. This battery terminal sealing device uses the radial flange and anti-rotation convex design of the conductive bolts to prevent the bolts from loosening due to vibration, and the gradient-distributed annular heat dissipation fins enhance heat dissipation capacity and extend battery life. Attached Figure Description

[0017] Figure 1 is a structural diagram of a battery terminal sealing device according to the present invention.

[0018] Figure 2 is a cross-sectional perspective view of a battery terminal sealing device according to the present invention.

[0019] Figure 3 is an enlarged view of section A of the battery terminal sealing device of this utility model.

[0020] Figure 4 is an exploded view of the conductive bolt of a battery terminal sealing device according to this utility model.

[0021] Figure 5 is a structural diagram of the conductive bolt of a battery terminal sealing device according to this utility model.

[0022] As shown in the figure:

[0023] 1. Insulating shell; 2. Terminal assembly; 3. Battery cover; 4. Annular sealing groove; 5. First seal; 6. Conductive bolt; 7. Compression nut; 8. Radial flange; 9. Sealing platform; 10. Second seal; 11. Annular heat dissipation fins; 12. Anti-slip texture; 13. Insulating layer; 14. Glue injection channel; 15. Guide section; 16. Molding section; 17. Anti-rotation protrusion; 18. Elastic washer. Detailed Implementation

[0024] 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.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1:

[0027] As shown in Figures 1-3 of the specification, a battery terminal sealing device includes an insulating housing 1 and a terminal assembly 2 disposed through the insulating housing 1. A battery cover plate 3 is fastened to the top of the insulating housing 1. Multiple annular heat dissipation fins 11 are provided on the outer surface of the insulating housing 1. The spacing between the fins decreases gradually from bottom to top. The gradient distribution of the annular heat dissipation fins 11 enhances the heat dissipation capacity and extends the battery life.

[0028] In this utility model, an annular sealing groove 4 is provided between the top of the inner wall of the insulating shell 1 and the connection between the battery cover plate 3, and a first sealing element 5 is embedded in the annular sealing groove 4 and abuts against the battery cover plate 3. The first sealing element 5 is a special-shaped sealing ring made of fluororubber, and its cross-section has a double-peak structure. The distance between the double peaks forms an interference fit with the groove width of the annular sealing groove 4 to provide an elastic seal.

[0029] In this utility model, the outer edge of the battery cover plate 3 extends downward to cover the joint of the insulating shell 1, and the insulating shell 1 is provided with a sealing platform 9 on the outer side of the battery cover plate 3. The outer edge of the battery cover plate 3 and the sealing platform 9 are fastened together to form the filling space of the second sealing member 10. The insulating shell 1 is provided with an adhesive injection channel 14 on the side above the filling space of the second sealing member 10. The adhesive injection channel 14 includes an inclined guiding section 15 and a vertically arranged molding section 16. The second sealing member 10 is a two-component epoxy resin adhesive, which forms a covering structure conformally to the outer surface of the insulating shell 1 and the terminal assembly 2 after curing.

[0030] As shown in Figures 4-5 of the instruction manual, the terminal assembly 2 includes a conductive bolt 6 with external threads at the bottom and a matching clamping nut 7. A radial flange 8 is provided in the middle of the conductive bolt 6. The lower end face of the radial flange 8 abuts against the upper end face of the battery cover 3. The lower surface of the radial flange 8 is provided with radially distributed anti-slip textures 12. The outer side of the radial flange 8 is sealed to the battery cover 3 through an insulating layer 13. The insulating layer 13 is a cast-sealed two-component epoxy resin. An elastic washer 18 is provided at the bottom of the clamping nut 7 and the battery cover 3. The elastic washer 18 is made of copper-clad graphite composite material with a thickness of 1.5-2mm.

[0031] In a specific implementation of this invention, the conductive bolt 6 passes through the battery cover plate 3 of the insulating shell 1, and the clamping nut 7 is tightened. The radial flange 8 fits against the battery cover plate 3, and the anti-slip texture 12 enhances the friction. Then, the battery is connected by the elastic gasket and the clamping nut 7. The fluororubber shaped sealing ring is embedded in the annular sealing groove 4 and the battery cover plate 3 is fastened, so that the first sealing element 5 is deformed under pressure to form an initial seal. Then, two-component epoxy resin is injected into the filling space through the injection channel 14, and after curing, a second sealing layer is formed. The first sealing element 5 (fluororubber ring) provides an elastic seal to adapt to temperature changes and mechanical vibration. The second sealing element 10 (epoxy resin) forms a rigid seal after curing, and the double protection ensures long-term sealing performance. The heat dissipation area is increased by the externally gradient distributed annular heat dissipation fins 11, which improves the thermal stability of the battery under high load.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A battery terminal sealing device, comprising an insulating housing (1) and a terminal assembly (2) disposed through the insulating housing (1), wherein a battery cover plate (3) is fastened to the top of the insulating housing (1), characterized in that: An annular sealing groove (4) is provided between the top of the inner wall of the insulating shell (1) and the connection between the battery cover (3) and the annular sealing groove (4) is fitted with a first sealing element (5) that abuts against the battery cover (3); the terminal assembly (2) includes a conductive bolt (6) with external threads at the bottom and a matching clamping nut (7), and a radial flange (8) is provided in the middle of the conductive bolt (6); the outer edge of the battery cover (3) extends downward to cover the joint of the insulating shell (1), and a sealing platform (9) is provided on the outer side of the insulating shell (1) located on the battery cover (3), and the outer edge of the battery cover (3) and the sealing platform (9) are fastened together to form the filling space of the second sealing element (10).

2. The battery terminal sealing device according to claim 1, characterized in that: The outer surface of the insulating shell (1) is provided with multiple annular heat dissipation fins (11), and the spacing between the fins decreases from bottom to top.

3. The battery terminal sealing device according to claim 1, characterized in that: The first sealing element (5) is a shaped sealing ring made of fluororubber, with a double-peak structure in its cross section. The distance between the double peaks forms an interference fit with the groove width of the annular sealing groove (4).

4. The battery terminal sealing device according to claim 1, characterized in that: The lower end face of the radial flange (8) abuts against the upper end face of the battery cover (3), and the lower surface of the radial flange (8) is provided with radially distributed anti-slip textures (12). The outer side of the radial flange (8) and the battery cover (3) are sealed together by an insulating layer (13).

5. A battery terminal sealing device according to claim 4, characterized in that: The insulating layer (13) is a two-component epoxy resin adhesive that is cast and sealed.

6. A battery terminal sealing device according to claim 1, characterized in that: The insulating housing (1) is provided with an injection channel (14) on the side above the injection space of the second seal (10), and the injection channel (14) includes an inclined guide section (15) and a vertical molding section (16).

7. A battery terminal sealing device according to claim 1, characterized in that: The second sealing element (10) is a two-component epoxy resin adhesive, which, after curing, forms a covering structure that conforms to the outer surface of the insulating shell (1) and the terminal assembly (2).

8. A battery terminal sealing device according to claim 1, characterized in that: The conductive bolt (6) is provided with an anti-rotation protrusion (17) at the insertion point between the radial flange (8) and the insulating shell (1). The height of the anti-rotation protrusion (17) is 1 / 5 to 1 / 3 of the bolt diameter.

9. A battery terminal sealing device according to claim 1, characterized in that: The clamping nut (7) and the bottom of the battery cover plate (3) are provided with elastic washers (18), which are made of copper-clad graphite composite material with a thickness of 1.5-2mm.

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