Battery waterproof sealing structure

Abstract

The utility model provides a kind of battery waterproof sealing structure, including upper cover, shell and main body, the main body is fixed in the inside of shell, the upper end of shell has opening, the side of upper cover towards shell is connected with sealing frame, the inside of shell is connected with the fixed frame between opening and main body, the outer wall of fixed frame is attached with the inner wall of shell, the upper surface of fixed frame is equipped with the accommodating groove for coating glue, the accommodating groove is communicated with the inner wall of shell, when upper cover covers and is located on shell, the end of sealing frame away from upper cover is embedded in accommodating groove, effectively solve the problem of glue overflow.

Description

Technical Field

[0001] This utility model relates to batteries, and more particularly to a waterproof sealing structure for batteries. Background Technology

[0002] Currently, battery structures typically include a top cover, an outer casing, and an internal main body. To ensure battery sealing and prevent internal material leakage or external contaminant ingress, a common method is to incorporate a sealing structure at the junction of the top cover and the outer casing.

[0003] In the prior art, a specific solution for achieving a sealing effect is as follows: Figures 1 to 3 As shown, a sealing frame 3 is integrally formed on the side of the upper cover 1 facing the outer shell 2. During assembly, the operator applies adhesive to the stepped structure formed by the sealing frame 3 and the lower edge of the upper cover 1. Then, the upper cover 1 is placed on the outer shell 2, at which point the sealing frame 3 enters the interior of the outer shell 2, and the upper edge of the outer shell 2 is placed within the step of the upper cover 1. In this way, adhesive can fill the space between the outer shell 2 and the sealing frame 3, as well as between the upper edge of the outer shell 2 and the upper cover 1, thereby forming a seal.

[0004] However, this sealing method has a significant drawback. When the top cover and the outer casing are pressed together, the amount of adhesive filling the steps is difficult to control precisely. Excess adhesive will be squeezed out and inevitably overflow from the gap between the outer casing and the top cover. This not only affects the overall appearance of the battery, but more importantly, the overflowing adhesive requires additional manual cleaning after it solidifies. This process increases the complexity of the production process and reduces production efficiency. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a waterproof sealing structure for batteries, which effectively solves the problem of glue overflow.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a waterproof sealing structure for a battery, including a top cover, a shell, and a main body. The main body is fixed inside the shell. The upper end of the shell has an opening. A sealing frame is connected to the side of the top cover facing the shell. A fixing frame is connected inside the shell between the opening and the main body. The upper surface of the fixing frame has a receiving groove for applying adhesive. The receiving groove communicates with the inner wall of the shell. When the top cover is placed on the shell, the end of the sealing frame away from the top cover is embedded in the receiving groove.

[0007] To achieve the above technical solution, adhesive is pre-applied to a receiving groove during battery assembly. Subsequently, the top cover is placed on the outer casing, and its lower sealing frame is embedded into the adhesive-filled receiving groove. This structure fundamentally solves the technical problem of adhesive overflowing from the joint between the outer casing and the top cover during the pressing process by redirecting the direction of adhesive overflow from the outside to the inside. This eliminates the need for cleaning up overflowing adhesive, ensuring a clean and neat product appearance.

[0008] As a preferred embodiment of this utility model, a threaded hole is provided on the side wall of the sealing frame, and a fixing hole is provided on the side wall of the outer shell. A locking bolt is inserted into the fixing hole, and the locking bolt is threaded into the threaded hole and abuts against the outer wall of the outer shell.

[0009] To achieve the above technical solution, after the top cover and outer shell are initially fixed, the locking bolts are sequentially passed through the fixing holes on the side wall of the outer shell and screwed into the threaded holes on the side wall of the sealing frame until they are tightly secured. This process, through threaded fastening, achieves a firm and reliable mechanical lock between the top cover and the outer shell on top of the adhesive seal. This significantly enhances the connection strength and stability of the overall structure, effectively prevents accidental detachment, and ensures the long-term reliability of the sealing structure and the overall safety of the battery.

[0010] As a preferred embodiment of this utility model, a reinforcing plate is connected to the corner of the fixed frame, and the cross-section of the reinforcing plate is triangular.

[0011] The above technical solution significantly improves the structural rigidity and deformation resistance of the fixing frame, especially its corner areas. This ensures that the fixing frame is less prone to deformation during assembly under pressure and long-term use, thereby guaranteeing the accuracy of the receiving groove dimensions and the consistency of the sealing effect.

[0012] As a preferred embodiment of this utility model, the fixing frame is connected to a plurality of contact plates on the side facing the main body. The contact plates correspond to the receiving grooves and the lower surface of the contact plates is used to abut against the upper surface of the main body. There is a gap between adjacent contact plates.

[0013] To achieve the above technical solution, a fixing frame is placed inside the outer casing, with the lower surfaces of multiple contact plates abutting against the upper surface of the main body, thus supporting the fixing frame. Through the supporting action of the contact plates, the vertical installation position of the fixing frame is precisely defined, ensuring a constant relative positional relationship between it and the main body, and pre-setting a precise stroke for the correct and stable embedding of the sealing frame into the receiving groove. Simultaneously, the spacing structure between adjacent contact plates provides channels for the internal wiring layout of the battery.

[0014] As a preferred embodiment of this utility model, a connecting groove is provided on the outer wall of the contact plate, and a receiving area for placing glue is formed between the connecting groove and the inner wall of the outer shell.

[0015] To achieve the above technical solution, a connecting groove is created on the outer wall of the contact plate, forming a receiving area for adhesive filling together with the inner wall of the outer casing. After adhesive application, this structure can form a strong adhesive area between the fixing frame and the outer casing. This enhances the connection strength between the fixing frame and the inner wall of the outer casing, effectively preventing the fixing frame from shifting or rotating inside the battery, ensuring the accuracy and stability of the core sealing structure's position, thereby improving the overall reliability and durability of the seal.

[0016] As a preferred embodiment of this utility model, a positioning hole is provided on the side wall of the contact plate, and a reinforcing annular groove for glue to flow in is provided on the inner wall of the positioning hole.

[0017] To achieve the above technical solution, during adhesive bonding, some adhesive flows into the positioning holes and reinforcing ring grooves within the contact plate sidewall. After the adhesive cures, an adhesive rivet with a tongue-and-groove interlocking structure is formed within the positioning hole. This design has a dual technical effect: firstly, by adding a physical tenon-and-mortise interlocking mechanism to the adhesive connection, it greatly enhances the bonding force and shear resistance between the fixing frame and the outer shell, achieving a more stable secondary reinforcement; secondly, the reinforcing ring groove also provides space for accommodating and buffering excess adhesive that may be generated during the process. Therefore, this design further improves the reliability of the connection while ensuring the cleanliness of the process and preventing excess adhesive from contaminating other components.

[0018] As a preferred embodiment of this utility model, a placement groove is provided on the side wall of the fixed frame, and an inclined elastic plate is fixedly connected to the inner wall of the placement groove. A connecting groove for placing the elastic inclined plate is provided on the inner wall of the sealing frame.

[0019] To achieve the above technical solution, during the pressing process of the upper cover, the sealing frame below it descends accordingly. When the connecting groove on its inner wall moves to the predetermined position, it contacts the inclined elastic plate on the fixed frame. As the upper cover continues to press, the elastic plate undergoes elastic deformation due to pressure and slides smoothly into the connecting groove along its inclined surface, ultimately forming a stable snap-fit ​​connection through elastic restoring force. This self-locking mechanical structure achieves rapid positioning and fastening of the upper cover and the fixed frame, effectively preventing relative misalignment and loosening between them, greatly enhancing the stability of the assembly and the reliability of the final sealing structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of existing technology; Figure 2 This is a schematic diagram of the exploded structure of existing technology; Figure 3This is a schematic diagram of the exploded structure of existing technology; Figure 4 This is a schematic diagram of the external structure of this utility model; Figure 5 This is a schematic diagram illustrating the connection structure between the top cover and the outer shell; Figure 6 This is a schematic diagram illustrating the connection structure between the top cover and the outer shell; Figure 7 This is a schematic diagram of the exploded structure of this utility model; Figure 8 This is a schematic diagram of the exploded structure of this utility model; Figure 9 This is a structural diagram of a fixed frame; Figure 10 for Figure 9 Enlarged view of point A.

[0021] Reference numerals: 1. Top cover; 2. Outer shell; 3. Sealing frame; 4. Main body; 5. Fixing frame; 6. Reinforcing plate; 7. Receiving groove; 8. Contact plate; 9. Spacing; 10. Connecting groove; 11. Positioning hole; 12. Reinforcing ring groove; 13. Placement groove; 14. Elastic inclined plate; 15. Connecting groove; 16. Threaded hole; 17. Fixing hole; 18. Locking bolt. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 4 To be continued Figure 10 The specific embodiments of this utility model will be further described in detail to make the technical solution of this utility model easier to understand and master.

[0023] A waterproof sealing structure for a battery includes a top cover 1, a housing 2, and a main body 4. The main body 4 is fixed inside the housing 2 and serves as the battery body 4. An opening is located at the upper end of the housing 2, through which the main body 4 extends from top to bottom into the housing 2. A sealing frame 3 is attached to the side of the top cover 1 facing the housing 2.

[0024] A fixing frame 5 is connected inside the outer casing 2, located between the opening and the main body 4. A reinforcing plate 6, with a triangular cross-section, is integrally connected to each corner of the fixing frame 5. Four reinforcing plates 6 are located at the four corners of the fixing frame 5.

[0025] A receiving groove 7 for applying adhesive is provided on the upper surface of the fixing frame 5. The receiving groove 7 is located at the edge of the fixing frame 5 and is connected to the inner wall of the outer shell 2. When the upper cover 1 is placed on the outer shell 2, the end of the sealing frame 3 away from the upper cover 1 is embedded in the receiving groove 7.

[0026] Multiple contact plates 8 are integrally connected on the side of the fixed frame 5 facing the main body 4. The contact plates 8 correspond to the receiving groove 7, and the lower surface of the contact plate 8 is used to abut against the upper surface of the main body 4. There is a gap 9 between two adjacent contact plates 8.

[0027] A connecting groove 10 is provided on the outer wall of the contact plate 8, and the length direction of the connecting groove 10 is set along the height direction of the outer casing 2. This forms a receiving area for placing adhesive between the connecting groove 10 and the inner wall of the outer casing 2.

[0028] A positioning hole 11 is provided on the side wall of the contact plate 8, and the positioning hole 11 is located between two adjacent connecting grooves 10. A reinforcing annular groove 12 for glue to flow in is provided on the inner wall of the positioning hole 11. The positioning hole 11 is a blind hole. The inner diameter of the reinforcing annular groove 12 is larger than the inner diameter of the positioning hole 11.

[0029] A placement groove 13 is provided on the side wall of the fixed frame 5, and an inclined elastic plate 14 is integrally connected to the inner wall of the placement groove 13. A connecting groove 15 for placing the elastic plate 14 is provided on the inner wall of the sealing frame 3. The elastic plate 14 is made of plastic.

[0030] Threaded holes 16 are provided on the side walls of the sealing frame 3, and threaded holes 16 are provided on all four side walls of the sealing frame 3. Fixing holes 17 are provided on the side walls of the outer casing 2, and the diameter of the fixing holes 17 is equal to the diameter of the threaded holes 16. A locking bolt 18 is inserted into the fixing hole 17, and the locking bolt 18 is threaded into the threaded hole 16 and abuts against the outer wall of the outer casing 2. The locking bolt 18 is a countersunk screw.

[0031] During battery assembly, the fixing frame 5, equipped with contact plate 8 and reinforcing plate 6, is first placed inside the outer casing 2. At this time, the lower surface of contact plate 8 abuts against the upper surface of the main body 4, thereby accurately positioning the fixing frame 5. Next, adhesive is evenly applied to the receiving groove 7 on the upper surface of the fixing frame 5, with some adhesive entering the receiving area and positioning hole 11 formed between contact plate 8 and the inner wall of outer casing 2. Afterward, the upper cover 1 is placed on outer casing 2, and the sealing frame 3 below it descends accordingly. The lower surface of the sealing frame 3 contacts the elastic inclined plate 14 on the fixing frame 5, causing the elastic inclined plate 14 to deform. When the sealing frame 3 is placed in the receiving groove 7, the elastic inclined plate 14 engages with the connecting groove 15, achieving initial snap-fit ​​fixing. Since the end of the sealing frame 3 is embedded in the receiving groove 7 filled with adhesive, a seal is formed. Finally, the locking bolts 18 are passed through the fixing holes 17 of the outer shell 2 in sequence and screwed into the threaded holes 16 of the sealing frame 3 until they are tight, thereby completing the mechanical locking of the upper cover 1 and the outer shell 2, further ensuring the firmness of the connection and the sealing reliability of the overall structure.

[0032] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A waterproof sealing structure for a battery, comprising a top cover (1), a shell (2), and a main body (4), wherein the main body (4) is fixed inside the shell (2), the upper end of the shell (2) has an opening, and a sealing frame (3) is connected to the side of the top cover (1) facing the shell (2), characterized in that: The inner part of the outer shell (2) is connected to a fixing frame (5) located between the opening and the main body (4). The upper surface of the fixing frame (5) is provided with a receiving groove (7) for applying glue. The receiving groove (7) is connected to the inner wall of the outer shell (2). When the upper cover (1) is placed on the outer shell (2), the end of the sealing frame (3) away from the upper cover (1) is embedded in the receiving groove (7).

2. The battery waterproof sealing structure according to claim 1, characterized in that: The sealing frame (3) has a threaded hole (16) on its side wall and a fixing hole (17) on its side wall. A locking bolt (18) is inserted into the fixing hole (17) and is threaded into the threaded hole (16) and abuts against the outer wall of the outer shell (2).

3. The battery waterproof sealing structure according to claim 1, characterized in that: The corner of the fixed frame (5) is connected to a reinforcing plate (6), and the cross-section of the reinforcing plate (6) is triangular.

4. The battery waterproof sealing structure according to claim 1, characterized in that: The fixing frame (5) is connected to a plurality of contact plates (8) on the side facing the main body (4). The contact plates (8) correspond to the receiving groove (7) and the lower surface of the contact plates (8) is used to abut against the upper surface of the main body (4). There is a gap (9) between adjacent contact plates (8).

5. The battery waterproof sealing structure according to claim 4, characterized in that: A connecting groove (10) is provided on the outer wall of the contact plate (8), and a receiving area for placing glue is formed between the connecting groove (10) and the inner wall of the outer shell (2).

6. A battery waterproof sealing structure according to claim 5, characterized in that: The contact plate (8) has a positioning hole (11) on its side wall, and a reinforcing annular groove (12) for glue to flow in is provided on the inner wall of the positioning hole (11).

7. The battery waterproof sealing structure according to claim 1, characterized in that: The fixed frame (5) has a placement groove (13) on its side wall, and an inclined elastic plate (14) is fixedly connected to the inner wall of the placement groove (13). The sealing frame (3) has a connecting groove (15) for placing the elastic plate (14) on its inner wall.

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