Secondary battery structure assembly

Abstract

The utility model discloses a secondary battery structure component which comprises a substrate, a lower insulating sheet and a pole component, the substrate is provided with a first pole interface, the first pole interface penetrates through the substrate, the first pole interface comprises an upper interface and a lower interface, and the diameter of the upper interface is larger than that of the lower interface; the lower insulation sheet is provided with a first pole interface, the first pole interface is recessed towards the inside of the substrate to form an annular groove, the lower insulation sheet is provided with a second pole interface, the first pole interface corresponds to the second pole interface in position, the second pole interface is provided with a clamping ring, and the clamping ring is connected into the first pole interface to be clamped to the lower interface. The device has the advantages of simple structure, compact matching, reasonable design and the like; therefore, the device is a product with excellent technical and economical performance.

Description

[Technical Field]

[0001] This utility model mainly relates to a secondary battery structure component. [Background Technology]

[0002] A secondary battery top cover is a top component used in secondary batteries (such as lithium-ion batteries). It is an important part of the battery and typically includes a top cover plate, terminal posts, and a lower plastic casing. The design and structure of the secondary battery top cover have a significant impact on the battery's performance, safety, and stability.

[0003] As a key component connecting the internal and external circuits of a battery, the strength of the connection between the terminal post and the top cover directly affects the battery's conductivity. A weak connection can lead to increased resistance, affecting the battery's charging and discharging efficiency, and even causing safety hazards such as overheating. Therefore, we propose a new technical solution to strengthen the top cover structure of secondary batteries. [Utility Model Content]

[0004] To address at least one of the aforementioned problems, this utility model proposes a new structural solution. The secondary battery structural assembly adopts the following technical solution:

[0005] A secondary battery structure assembly includes a substrate, a lower insulating sheet, and an electrode assembly. The substrate has a first electrode interface that penetrates the substrate. The first electrode interface includes an upper interface and a lower interface, with the diameter of the upper interface being larger than the diameter of the lower interface. The first electrode interface is recessed into the substrate to form an annular groove.

[0006] The lower insulating sheet is provided with a second pole interface, and the positions of the first pole interface and the second pole interface are corresponding. The second pole interface is provided with a retaining ring, which is connected to the first pole interface to lock into the lower interface.

[0007] Preferably, the first pole terminal has a protrusion, and the upper terminal is located on the protrusion.

[0008] Preferably, the pole assembly includes an upper plastic core, a pole positioning ring, a polarity terminal, and a sealing ring; the pole positioning ring is placed in an annular groove, and the pole positioning ring has a recess, where the polarity terminal and the sealing ring are connected.

[0009] Preferably, the upper plastic has an insert position, and the protrusion is inserted into the insert position; the upper plastic, the pole positioning ring, the protrusion and the first pole interface are connected to fix the pole assembly on the substrate.

[0010] Preferably, the lower insulating sheet includes a first lower insulating sheet and a second lower insulating sheet, which are connected by a rib, allowing them to move relative to each other.

[0011] Preferably, the ribs are bent.

[0012] Preferably, both the first lower insulating sheet and the second lower insulating sheet have vent holes at their ends.

[0013] Preferably, the end where the first lower insulating sheet connects to the reinforcing strip is provided with an exhaust hole.

[0014] Preferably, the substrate has a vent hole at its center, and the vent hole is connected to an explosion-proof sheet and an explosion-proof valve patch, with the explosion-proof valve patch and the explosion-proof sheet located on opposite sides of the vent hole.

[0015] The beneficial effects of this utility model compared with the prior art are:

[0016] The pole assembly and the lower insulating sheet can be interlocked through this structure, which enhances the overall robustness, simplifies the structure, and increases the yield rate. It has the advantages of simple structure, compact fit, and reasonable design. Therefore, it is a product with superior performance in both technology and economy. [Attached Image Description]

[0017] Figure 1 A first-view schematic diagram of the secondary battery structure assembly in a preferred embodiment of this utility model;

[0018] Figure 2 A second-view schematic diagram of the secondary battery structure assembly in a preferred embodiment of this utility model;

[0019] Figure 3 An exploded view of the secondary battery structure assembly in a preferred embodiment of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the secondary battery structure component in a preferred embodiment of the present invention.

Detailed Implementation Methods

[0021] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] The preferred embodiment provided by this utility model is as follows: Figures 1-4 As shown, a secondary battery structure assembly includes a substrate 1, a lower insulating sheet 2, and an electrode assembly 3; the electrode assembly 3 includes a positive electrode assembly and a negative electrode assembly, which have the same structure; the substrate 1 has a vent hole 11 at its center, and the vent hole 11 is connected to an explosion-proof sheet 12 and an explosion-proof valve patch 13, with the explosion-proof valve patch 13 and the explosion-proof sheet 12 located on opposite sides of the vent hole 11.

[0025] The substrate 1 is provided with a first terminal interface 14, which is respectively located on both sides of the substrate to facilitate the installation of the positive terminal assembly and the negative terminal assembly. The first terminal interface 14 penetrates the substrate 1 and includes an upper interface 15 and a lower interface 16. The diameter of the upper interface 15 is larger than the diameter of the lower interface 16. The first terminal interface 14 is recessed into the substrate 1 to form an annular groove 17. The lower insulating sheet 2 is provided with a second terminal interface 21. The positions of the first terminal interface 14 and the second terminal interface 21 are corresponding. The second terminal interface 21 is provided with a retaining ring 22, which is inserted into the first terminal interface 14 to engage with the lower interface 16. The outer wall of the retaining ring 22 is provided with a trapezoidal protrusion 23 so that the retaining ring 22 can slide in and then engage with the lower interface 16.

[0026] The first electrode interface 14 has a protrusion 18, and the upper interface 15 is located on the protrusion 18. The electrode assembly 3 includes an upper plastic 31, an electrode positioning ring 32, a polarity terminal 33, and a sealing ring 34; the electrode positioning ring 32 is placed in an annular groove 17, and the electrode positioning ring 32 has a recess 35, where the polarity terminal 33 and the sealing ring 34 are connected. The upper plastic 31 has an insertion position 36, and the protrusion 18 is inserted into the insertion position 36; the electrode assembly 3 is fixed to the substrate 1 by the upper plastic 31, the electrode positioning ring 32, the protrusion 18, and the first electrode interface 14. The end of the protrusion 18 is curved, and the shape of the insertion position 36 corresponds to the shape of the end of the protrusion 18.

[0027] The lower insulating sheet 2 includes a first lower insulating sheet 24 and a second lower insulating sheet 25. The first lower insulating sheet 24 and the second lower insulating sheet 25 are connected by a rib 4, allowing them to move relative to each other. The rib 4 is bent; furthermore, the rib 4 is an integral structure, including a first rib portion 41, a second rib portion 42, and a third rib portion 43. The first rib portion 41 and the second rib portion 42 are respectively connected to the two ends of the third rib portion 43. The first rib portion 41 and the second rib portion 42 are horizontal, and the first rib portion 41 and the third rib portion 43 are perpendicular. The first rib portion 41 and the second rib portion 42 are separated by the third rib portion 43, forming a gap between them. Both the first lower insulating sheet 24 and the second lower insulating sheet 25 have vent holes 44 at their ends, and each vent hole 44 has a cavity 45 located within the cavity 45. The end of the first lower insulating sheet 24 connected to the rib 4 has a vent hole 44.

[0028] The terminal assembly and the lower insulating sheet can be interlocked through this structure, enhancing overall robustness. Furthermore, the terminal assembly can be fixed to the substrate and the lower insulating plate by riveting, replacing the traditional welding method. The riveting process can improve the structural strength and torsional resistance of the terminal, while ensuring the seal between the terminal and the top cover, effectively improving the safety and stability of the battery, which is of great significance for the long-term use of secondary batteries.

[0029] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A secondary battery structural assembly, characterized in that: It includes a substrate, a lower insulating sheet, and an electrode assembly; the substrate has a first electrode interface that penetrates the substrate, and the first electrode interface includes an upper interface and a lower interface, the diameter of the upper interface being larger than the diameter of the lower interface; the first electrode interface is recessed into the substrate to form an annular groove. The lower insulating sheet is provided with a second pole interface, and the positions of the first pole interface and the second pole interface are corresponding. The second pole interface is provided with a retaining ring, which is connected to the first pole interface to lock into the lower interface.

2. The secondary battery structure assembly according to claim 1, characterized in that: The first pole terminal has a protrusion, and the upper terminal is located on the protrusion.

3. A secondary battery structure assembly according to claim 1, characterized in that: The pole assembly includes an upper plastic core, a pole positioning ring, a polar terminal, and a sealing ring; the pole positioning ring is placed in an annular groove, and the pole positioning ring has a recess, where the polar terminal and the sealing ring are connected.

4. A secondary battery structure assembly according to claim 3, characterized in that: The upper plastic has an insert position, and the protrusion is inserted into the insert position; the upper plastic, the pole positioning ring, the protrusion and the first pole interface are connected to fix the pole assembly on the substrate.

5. A secondary battery structure assembly according to claim 1, characterized in that: The lower insulating sheet includes a first lower insulating sheet and a second lower insulating sheet. The first lower insulating sheet and the second lower insulating sheet are connected by ribs, so that the first lower insulating sheet and the second lower insulating sheet can move relative to each other.

6. A secondary battery structure assembly according to claim 5, characterized in that: The reinforcing bars are bent.

7. A secondary battery structure assembly according to claim 1, characterized in that: Both the first and second lower insulating sheets have vent holes at their ends.

8. A secondary battery structure assembly according to claim 5, characterized in that: The first end of the connection between the lower insulating sheet and the reinforcing strip has an exhaust hole.

9. A secondary battery structure assembly according to claim 1, characterized in that: The substrate has a vent hole at its center, and the vent hole is connected to an explosion-proof sheet and an explosion-proof valve patch, with the explosion-proof valve patch and the explosion-proof sheet located on opposite sides of the vent hole.

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