Novel ceramic column secondary battery top cover structure

Abstract

The utility model discloses a novel ceramic column secondary battery top cover structure which comprises a battery shell, the battery shell comprises a cover plate arranged at the top of the battery shell, a stepped through opening is formed in the cover plate, a sealing ring is arranged on the stepped through opening, a pole is arranged on the sealing ring, a welding ring is arranged at the position, located on the outer side of the sealing ring, of the stepped through opening, and the pole is arranged on the welding ring. An injection molding ring is formed on the outer side face of the welding ring and the gap among the welding ring, the pole and the sealing ring through injection molding and rubber coating, a flange is arranged on the outer side face of the pole, and a plurality of ceramic columns are arranged on the top face of the flange at equal intervals around the center axis of the flange. The assembly of the injection molding ring is completed through an injection molding encapsulation process, namely, the injection molding inner ring is positioned in the gap among the welding ring, the pole and the sealing ring, so that the stability of the injection molding ring is greatly enhanced and the injection molding ring is not easy to loosen under the blocking of the ceramic column, the welding ring is more stable due to the support of the ceramic column, and the strength of the structure is improved.

Description

Technical Field

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

[0002] With the rapid development of new energy battery technology, the battery top cover, as a key component for battery sealing and safety protection, has a significant impact on battery performance and reliability due to its structural design.

[0003] Currently, battery top covers typically use components such as terminals, sealing rings, and welding rings to achieve sealing. However, in practical applications, vibration, thermal expansion and contraction, or external forces can easily cause the injection-molded ring and welding ring to loosen, thereby affecting sealing performance and structural strength, and even causing electrolyte leakage or safety hazards. In existing technologies, sealing performance is usually improved by increasing welding strength or optimizing injection molding materials, but these methods are often costly or have limited effectiveness. For example, some solutions use complex multi-layer sealing structures, which can improve sealing performance, but increase assembly difficulty and production costs.

[0004] To address this, a novel ceramic pillar secondary battery top cover structure is proposed to improve the stability of the injection-molded ring and the overall structural strength. Utility Model Content

[0005] The purpose of this invention is to provide a novel ceramic column secondary battery top cover structure to solve the problem mentioned in the background art that the existing battery top cover structure is prone to loosening of the injection ring and welding ring due to vibration or external force during long-term use, which leads to a decrease in structural sealing and structural strength.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel ceramic column secondary battery top cover structure, comprising a battery housing, the battery housing including a cover plate disposed on its top, the cover plate having a stepped through-hole, a sealing ring disposed on the stepped through-hole, an electrode post disposed on the sealing ring, a welding ring disposed on the stepped through-hole at the outer side of the sealing ring, and an injection-molded ring formed by injection molding at the outer side of the welding ring and the gap between the welding ring, the electrode post and the sealing ring;

[0007] The outer side of the pole post is provided with a flange, and the outer side of the pole post is provided with a number of side grooves at equal intervals around its central axis. The top surface of the flange is provided with a number of ceramic pillars at equal intervals around its central axis. The ceramic pillars are all located in the side grooves, and the top surface of the ceramic pillars abuts against the welding ring.

[0008] Preferably, the injection ring includes an outer injection ring and an inner injection ring. The outer injection ring is located on the outer side of the welding ring, and the inner injection ring is located in the gap between the welding ring, the pole, and the sealing ring. The outer injection ring and the inner injection ring are integrally formed.

[0009] Preferably, the cross-section of the welding ring is a Z-shape with left and right reversals.

[0010] Preferably, the sealing ring includes an upper flange disposed on the outer periphery of its top surface and a lower flange disposed on the inner periphery of its bottom surface.

[0011] Preferably, the height of the ceramic column is lower than the top surface of the pole column.

[0012] Preferably, the outer wall of the flange on the pole is fitted to the inner wall of the upper flange on the sealing ring.

[0013] Preferably, the outer wall of the lower flange on the sealing ring is fitted to the inner wall of the stepped through-hole.

[0014] Preferably, the inner wall of the stepped perforation is stepped.

[0015] Preferably, the top surface of the cover plate is provided with a cover plate, which covers the bottom of the injection ring.

[0016] Preferably, the bottom surface of the cover plate is provided with a stop frame, the bottom surface of the stop frame is provided with a protrusion at the stepped opening, the bottom surface of the protrusion is provided with connecting frames on both sides, the battery casing is provided with an inner core, and the connecting frame is located on the top of the inner core.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This structure, through the setting and cooperation of stepped through-hole, ceramic pillar and welding ring, utilizes the ceramic pillar to hold the welding ring in place, and completes the assembly of the injection ring through injection molding process. That is, the injection-molded inner ring will be located in the gap between the welding ring, the terminal post and the sealing ring. Thus, under the obstruction of the ceramic pillar, the stability of the injection ring is greatly enhanced and it is not easy to loosen. The welding ring is more stable due to the support of the ceramic pillar, which improves the strength of this structure. The structure is simple and efficient, and is suitable for widespread application on battery top covers. Attached Figure Description

[0018] Figure 1 This is an overall structural view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4This is a cross-sectional view of the present invention;

[0022] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 This is a cross-sectional view of the present invention;

[0024] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0025] Figure 8 This is a structural view of the cover plate in this utility model;

[0026] Figure 9 This is a structural view of the injection ring in this utility model;

[0027] Figure 10 This is a structural view of the welding ring in this utility model;

[0028] Figure 11 This is a structural view of the pole column in this utility model;

[0029] Figure 12 This is a structural view of the sealing ring in this utility model.

[0030] In the diagram: 1. Battery casing; 11. Cover plate; 12. Cover plate; 13. Connecting frame; 14. Stop frame; 2. Stepped through-hole; 3. Thrust; 4. Injection ring; 41. Injection outer ring; 42. Injection inner ring; 5. Welding ring; 6. Terminal post; 61. Flange; 62. Side groove; 63. Ceramic post; 7. Sealing ring; 71. Upper flange; 72. Lower flange. Detailed Implementation

[0031] 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.

[0032] Reference Figure 1-12 As shown, this utility model provides a technical solution for a novel ceramic pillar secondary battery top cover structure:

[0033] Reference Figure 1-8As shown, a novel ceramic column secondary battery top cover structure includes a battery housing 1. The battery housing 1 includes a cover plate 11 disposed on its top. A stepped through-hole 2 is provided on the cover plate 11. A sealing ring 7 is provided on the stepped through-hole 2. An electrode post 6 is provided on the sealing ring 7. A welding ring 5 is provided on the stepped through-hole 2 outside the sealing ring 7. An injection-molded ring 4 is formed by injection molding at the outer side of the welding ring 5 and the gap between the welding ring 5, the electrode post 6 and the sealing ring 7. It should be noted that the injection molding process is existing technology and will not be described in detail here.

[0034] Reference Figure 11 As shown, the outer side of the pole post 6 is provided with a flange 61, and the outer side of the pole post 6 is provided with a number of side grooves 62 at equal intervals around its central axis. The top surface of the flange 61 is provided with a number of ceramic pillars 63 at equal intervals around its central axis. The ceramic pillars 63 are all located in the side grooves 62, and the top surface of the ceramic pillars 63 abuts against the welding ring 5.

[0035] Reference Figure 9 As shown, in an optional embodiment: the injection ring 4 includes an injection-molded outer ring 41 and an injection-molded inner ring 42. The injection-molded outer ring 41 is located on the outer side of the welding ring 5, and the injection-molded inner ring 42 is located in the gap between the welding ring 5, the pole post 6 and the sealing ring 7. The injection-molded outer ring 41 and the injection-molded inner ring 42 are integrally formed.

[0036] Reference Figure 10 and Figure 12 As shown, the cross-section of the welding ring 5 is a Z-shape with left and right reversals. It should be noted that the top surface of the ceramic pillar 63 abuts against the upper inner bottom surface of the welding ring 5, which serves to support the welding ring 5. The sealing ring 7 includes an upper flange 71 disposed on the outer periphery of its top surface and a lower flange 72 disposed on the inner periphery of its bottom surface. The height of the ceramic pillar 63 is lower than the top surface of the pole post 6. The outer side wall of the flange 61 on the pole post 6 is attached to the inner side wall of the upper flange 71 on the sealing ring 7. The outer side wall of the lower flange 72 on the sealing ring 7 is attached to the inner side wall of the stepped through-hole 2. The inner side wall of the stepped through-hole 2 is set in a stepped shape. The top surface of the cover plate 11 is provided with a cover plate 12, which covers the bottom of the injection ring 4. Through this arrangement, the injection outer ring 41 in the injection ring 4 is more stable.

[0037] Reference Figure 8 As shown, in an optional embodiment: a stop frame 14 is provided on the bottom surface of the cover plate 11, and a protrusion 3 is provided on the bottom surface of the stop frame 14 at the stepped through-hole 2. Connecting frames 13 are provided on both sides of the bottom surface of the protrusion 3. An inner core 15 is provided inside the battery housing 1, and the connecting frame 13 is located on the top of the inner core 15. It should be noted that the protrusion 3 protrudes towards the bottom surface of the pole post 6, which saves the internal space of the battery housing 1 and makes the structure more compact.

[0038] The working principle and beneficial effects of this structure: Through the arrangement and cooperation of the stepped through-hole 2, ceramic pillar 63, and welding ring 5, the ceramic pillar 63 holds the welding ring 5 in place. The injection-molded ring 4 is assembled through an injection molding process. That is, the injection-molded inner ring 42 is located in the gap between the welding ring 5, the terminal post 6, and the sealing ring 7. Under the obstruction of the ceramic pillar 63, the stability of the injection-molded ring 4 is greatly enhanced, making it less prone to loosening. This improves the sealing performance of the structure. The welding ring 5 is more stable due to the support of the ceramic pillar 63, which improves the strength of the structure. The structure is simple and efficient, and is suitable for widespread application in battery top covers.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel ceramic column secondary battery top cover structure, comprising a battery housing (1), wherein the battery housing (1) includes a cover plate (11) disposed on its top, characterized in that: The cover plate (11) has a stepped opening (2), a sealing ring (7) is provided on the stepped opening (2), a pole post (6) is provided on the sealing ring (7), a welding ring (5) is provided on the stepped opening (2) at the outer side of the sealing ring (7), and an injection ring (4) is formed by injection molding at the outer side of the welding ring (5) and the gap between the welding ring (5), the pole post (6) and the sealing ring (7); The outer side of the pole post (6) is provided with a flange (61), and the outer side of the pole post (6) is provided with a plurality of side grooves (62) at equal intervals around its central axis. The top surface of the flange (61) is provided with a plurality of ceramic pillars (63) at equal intervals around its central axis. The ceramic pillars (63) are all located in the side grooves (62), and the top surface of the ceramic pillars (63) abuts against the welding ring (5).

2. The novel ceramic column secondary battery top cover structure according to claim 1, characterized in that: The injection ring (4) includes an injection outer ring (41) and an injection inner ring (42). The injection outer ring (41) is located on the outer side of the welding ring (5), and the injection inner ring (42) is located in the gap between the welding ring (5), the pole (6) and the sealing ring (7). The injection outer ring (41) and the injection inner ring (42) are integrally formed.

3. The novel ceramic column secondary battery top cover structure according to claim 2, characterized in that: The cross-section of the welding ring (5) is a Z-shape with left and right reversals.

4. The novel ceramic column secondary battery top cover structure according to claim 3, characterized in that: The sealing ring (7) includes an upper flange (71) disposed on the outer periphery of its top surface and a lower flange (72) disposed on the inner periphery of its bottom surface.

5. The novel ceramic column secondary battery top cover structure according to claim 4, characterized in that: The height of the ceramic column (63) is lower than the top surface of the pole column (6).

6. The novel ceramic pillar secondary battery top cover structure according to claim 5, characterized in that: The outer wall of the flange (61) on the pole post (6) is attached to the inner wall of the upper flange (71) on the sealing ring (7).

7. The novel ceramic column secondary battery top cover structure according to claim 6, characterized in that: The outer wall of the lower flange (72) on the sealing ring (7) is attached to the inner wall of the stepped through-hole (2).

8. The novel ceramic column secondary battery top cover structure according to claim 7, characterized in that: The inner wall of the stepped opening (2) is set in a stepped shape.

9. The novel ceramic column secondary battery top cover structure according to claim 8, characterized in that: The top surface of the cover plate (11) is provided with a cover plate (12), which covers the bottom of the injection ring (4).

10. The novel ceramic column secondary battery top cover structure according to claim 1, characterized in that: The bottom surface of the cover plate (11) is provided with a stop frame (14), and the bottom surface of the stop frame (14) is provided with a protrusion (3) at the stepped through-hole (2). The bottom surfaces of the protrusion (3) are respectively provided with connecting frames (13). The battery housing (1) is provided with an inner core (15), and the connecting frame (13) is located on the top of the inner core (15).

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