A negative electrode post sealing structure

Abstract

This utility model relates to the field of battery component sealing technology, and discloses a negative electrode post sealing structure, including a negative electrode post, an upper cover plate, and a lower insulating plate. The negative electrode post, a base, and a sealing ring are sequentially installed between the upper cover plate and the lower insulating plate from top to bottom. The base is connected to the bottom of the negative electrode post, and the sealing ring is installed at the bottom of the base. The sealing ring is mounted on the lower insulating plate. A rubber-coated component is injection-molded between the negative electrode post, the upper cover plate, and the lower insulating plate. Connecting protrusions are provided on both sides of the sealing ring. A first connecting groove adapted to the connecting protrusions is formed at the bottom of the base, and a second connecting groove adapted to the connecting protrusions is formed on the lower insulating plate. This utility model achieves positioning and installation through the sealing ring, the base, and the lower insulating plate. The sealing ring also provides a sealing function. The rubber-coated component is directly filled into the gap between the upper cover plate, the lower insulating plate, and the negative electrode post using an injection molding process, allowing the three to form a firm connection directly through the rubber-coated component. The molded rubber-coated component covers the connection area, improving the sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of battery component sealing technology, specifically, it relates to a negative electrode post sealing structure. Background Technology

[0002] During battery use, the sealing performance of the negative terminal is crucial. A poor sealing structure can easily allow external moisture, dust, and other impurities to enter the battery, affecting its performance and lifespan, and may even cause safety issues such as short circuits.

[0003] During use, it was found that the existing negative electrode post sealing structure has problems such as insufficient tightness of connection, poor sealing effect, and complicated installation process, which makes it difficult to meet the actual use requirements.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] To address the problems of insufficient tightness, poor sealing effect, and complex installation process in existing negative electrode post sealing structures, which make them difficult to meet practical application requirements, the basic concept of the technical solution adopted in this utility model is as follows: A negative electrode sealing structure includes a negative electrode, an upper cover plate, and a lower insulating plate. The negative electrode, a base, and a sealing ring are sequentially installed between the upper cover plate and the lower insulating plate from top to bottom. The bottom of the negative electrode is connected to the base, and the bottom of the base is equipped with a sealing ring. The sealing ring is installed on the lower insulating plate. An encapsulated part is injection molded between the negative electrode, the upper cover plate, and the lower insulating plate. Both sides of the sealing ring are provided with connecting protrusions, the bottom of the base is provided with a first connecting groove that matches the connecting protrusions, and the lower insulating plate is provided with a second connecting groove that matches the connecting protrusions.

[0006] In a preferred embodiment of the present invention, the connecting protrusion has an annular structure, and both the first connecting groove and the second connecting groove are annular grooves adapted to the shape of the connecting protrusion.

[0007] In a preferred embodiment of this utility model, the rubber-coated component is made of insulating and aging-resistant rubber material, and the rubber-coated component completely covers the connection between the negative electrode post and the upper cover plate and the lower insulating plate. The upper cover plate and the lower insulating plate are connected by a connector.

[0008] In a preferred embodiment of this utility model, a baffle is connected to the upper cover plate, and a connecting sleeve is provided on the outside of the baffle. The connecting sleeve and the rubber-coated part are integrally injection molded.

[0009] In a preferred embodiment of this utility model, the injection height of the connecting sleeve is higher than the height of the baffle, and an inwardly folded edge structure is formed on the top of the connecting sleeve.

[0010] In a preferred embodiment of this utility model, the sealing ring is made of elastic rubber material, and the connecting protrusion of the sealing ring is interference-fitted with the first connecting groove and the second connecting groove.

[0011] Compared with the prior art, the present invention has the following advantages: This utility model achieves positioning and installation through a sealing ring, a base, and a lower insulating plate. The sealing ring also has a sealing function. The rubber-coated part is directly filled into the gap between the upper cover plate, the lower insulating plate, and the negative electrode post using an injection molding process, so that the three are directly and firmly connected through the rubber-coated part. The molded rubber-coated part covers the connection and improves the sealing performance.

[0012] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0013] In the attached diagram: Figure 1 This is a schematic diagram of a negative electrode post sealing structure. Figure 2 A negative electrode post sealing structure Figure 1 Enlarged view of point A in the middle; Figure 3 This is a three-dimensional diagram of a negative electrode post sealing structure.

[0014] In the diagram: 1. Negative terminal post; 2. Base; 21. First connecting groove; 3. Rubber-coated part; 31. Connecting sleeve; 4. Upper cover plate; 41. Baffle plate; 5. Lower insulating plate; 51. Second connecting groove; 6. Sealing ring; 61. Connecting protrusion. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0016] like Figures 1 to 3 As shown, a negative electrode sealing structure includes a negative electrode 1, an upper cover plate 4 and a lower insulating plate 5. The negative electrode 1, a base 2 and a sealing ring 6 are installed between the upper cover plate 4 and the lower insulating plate 5 from top to bottom. The bottom of the negative electrode 1 is connected to the base 2, and the sealing ring 6 is installed at the bottom of the base 2. The sealing ring 6 is installed on the lower insulating plate 5. A rubber-coated part 3 is injection molded between the negative electrode 1 and the upper cover plate 4 and the lower insulating plate 5. Both sides of the sealing ring 6 are provided with connecting protrusions 61. The bottom of the base 2 is provided with a first connecting groove 21 that matches the connecting protrusions 61, and the lower insulating plate 5 is provided with a second connecting groove 51 that matches the connecting protrusions 61. In this configuration, the negative terminal 1, as a key component for current transmission, is connected to the sealing ring 6 through the bottom base 2. The upper cover plate 4 and the lower insulating plate 5 form the upper and lower frames of the sealing structure. The connecting protrusions 61 on both sides of the sealing ring 6 cooperate with the first connecting groove 21 of the base 2 and the second connecting groove 51 of the lower insulating plate 5 to achieve positioning and bottom sealing. By injection molding the rubber part 3 between the negative terminal 1 and the upper cover plate 4 and the lower insulating plate 5, the gaps are filled and the components are firmly connected to form a complete sealing system.

[0017] like Figures 1 to 3 As shown, in a specific embodiment, the connecting protrusion 61 has an annular structure, and both the first connecting groove 21 and the second connecting groove 51 are annular grooves adapted to the shape of the connecting protrusion 61. In this configuration, the annular connecting protrusion 61 cooperates with the first connecting groove 21 and the second connecting groove 51 of the base 2 and the lower insulating plate 5 to ensure that the sealing ring 6 achieves a seal.

[0018] like Figures 1 to 3 As shown, furthermore, the rubber-coated component 3 is made of insulating and aging-resistant rubber material. The rubber-coated component 3 completely covers the connection between the negative electrode post 1 and the upper cover plate 4 and the lower insulating plate 5. The upper cover plate 4 and the lower insulating plate 5 are connected by a connector. In this configuration, the rubber-coated component 3, made of insulating and aging-resistant rubber material, completely covers the connection between the negative electrode post 1 and the upper cover plate 4 and the lower insulating plate 5 after injection molding. This not only isolates external moisture and dust, preventing leakage, but also ensures a tight seal as the upper cover plate 4 and the lower insulating plate 5 are connected by a connector, together with the rubber-coated component 3.

[0019] like Figures 1 to 3 As shown, furthermore, a baffle 41 is connected to the upper cover plate 4, and a connecting sleeve 31 is provided on the outside of the baffle 41. The connecting sleeve 31 and the rubber-coated part 3 are integrally injection molded. In this configuration, the connecting sleeve 31 and the rubber-coated part 3 are integrally injection molded and fitted on the outside of the baffle 41. Through the interlocking, the connection between the upper cover plate 4 and the rubber-coated part 3 is further enhanced, improving the structural reliability.

[0020] like Figures 1 to 3 As shown, the injection height of the connecting sleeve 31 is higher than the height of the baffle 41, and an inwardly folded edge structure is formed on the top of the connecting sleeve 31. In this configuration, the connecting sleeve 31 is higher than the baffle 41, and its inwardly folded edge structure tightly fits the baffle 41, eliminating the gap between the two and improving the sealing performance.

[0021] like Figures 1 to 3As shown, the sealing ring 6 is further made of elastic rubber material, and the connecting protrusion 61 of the sealing ring 6 is in an interference fit with the first connecting groove 21 and the second connecting groove 51. In this configuration, the interference fit between the connecting protrusion 61 and the first connecting groove 21 and the second connecting groove 51 creates a compression sealing effect, which can achieve positioning and maintain good sealing performance.

[0022] The implementation principle of the negative electrode post sealing structure in this embodiment is as follows: In the actual installation process, firstly, the sealing ring 6 is placed on the lower insulating plate 5, so that the connecting protrusion 61 of the sealing ring 6 is embedded in the second connecting groove 51 of the lower insulating plate 5, completing the initial positioning of the sealing ring 6. Next, the negative electrode post 1 connected to the base 2 is placed on the sealing ring 6, so that the first connecting groove 21 at the bottom of the base 2 and the connecting protrusion 61 of the sealing ring 6 are correspondingly engaged, and the interference fit is used to achieve a stable connection between the base 2, the sealing ring 6, and the lower insulating plate 5, and at the same time complete the positioning of the negative electrode post 1. Then, the upper electrode post 1 is connected by the connector. The cover plate 4 is connected to the lower insulating plate 5. At this time, a gap space is formed between the negative electrode post 1, the upper cover plate 4 and the lower insulating plate 5, which can be used for injection molding of the rubber-coated part 3. Finally, the insulating and aging-resistant rubber material is injected into the gap by injection molding process, so that it is formed around the negative electrode post 1 to form the rubber-coated part 3. During the molding process of the rubber-coated part 3, the connecting sleeve 31 simultaneously wraps around the baffle 41 of the upper cover plate 4 and forms an inward folded edge structure at the top, completing the installation of the entire negative electrode post sealing structure. Through the above steps, the rapid positioning, tight connection and good sealing effect of each component are achieved, which meets the battery usage requirements.

Claims

1. A negative electrode sealing structure, comprising a negative electrode post (1), an upper cover plate (4), and a lower insulating plate (5), characterized in that, A negative electrode post (1), a base (2), and a sealing ring (6) are installed sequentially from top to bottom between the upper cover plate (4) and the lower insulating plate (5). The bottom of the negative electrode post (1) is connected to the base (2), and the bottom of the base (2) is equipped with a sealing ring (6). The sealing ring (6) is installed on the lower insulating plate (5). A rubber-coated part (3) is injection molded between the negative electrode post (1), the upper cover plate (4), and the lower insulating plate (5). The sealing ring (6) has connecting protrusions (61) on both sides, the base (2) has a first connecting groove (21) adapted to the connecting protrusions (61) at the bottom, and the lower insulating plate (5) has a second connecting groove (51) adapted to the connecting protrusions (61) on the top.

2. The negative electrode post sealing structure according to claim 1, characterized in that, The connecting protrusion (61) has an annular structure, and the first connecting groove (21) and the second connecting groove (51) are both annular grooves adapted to the shape of the connecting protrusion (61).

3. The negative electrode post sealing structure according to claim 1, characterized in that, The rubber-coated part (3) is made of insulating and aging-resistant rubber material. The rubber-coated part (3) completely covers the connection between the negative electrode post (1) and the upper cover plate (4) and the lower insulating plate (5). The upper cover plate (4) and the lower insulating plate (5) are connected by a connector.

4. The negative electrode post sealing structure according to claim 1, characterized in that, A baffle (41) is connected to the upper cover plate (4), and a connecting sleeve (31) is provided on the outside of the baffle (41). The connecting sleeve (31) and the rubber-coated part (3) are integrally injection molded.

5. The negative electrode post sealing structure according to claim 4, characterized in that, The injection height of the connecting sleeve (31) is higher than the height of the baffle (41), and an inwardly folded edge structure is formed on the top of the connecting sleeve (31).

6. The negative electrode post sealing structure according to claim 1, characterized in that, The sealing ring (6) is made of elastic rubber material, and the connecting protrusion (61) of the sealing ring (6) is interference-fitted with the first connecting groove (21) and the second connecting groove (51).

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