Standard terminal, cover plate and secondary battery

Abstract

The invention discloses a standard terminal, a cover plate and a secondary battery, and relates to the technical field of batteries. The sealing ring is arranged on the lower aluminum ring; the pole is arranged at the top of the sealing ring and comprises an upper end part and a lower end part, the outer diameter of the axial surface of the lower end part is larger than that of the axial surface of the upper end part, and the axial surface of the lower end part is of a conical surface structure which is folded from top to bottom; the upper aluminum ring is arranged on the lower aluminum ring and is used for fixing the pole; the injection molding layer coats the outer surfaces of the upper aluminum ring and the pole and isolates the upper aluminum ring from the pole; the cover plate uses the standard terminal, the secondary battery uses the cover plate, and the standard terminal is arranged, so that the production process of the battery cover plate is simplified, the production efficiency is improved, and the actual production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a standard terminal, a cover plate and a secondary battery. Background Art

[0002] With the rapid development of science and technology, secondary batteries, as key components for energy storage and conversion, play a vital role in many fields such as electric vehicles, energy storage systems, and portable electronic devices. The performance, safety, and production cost of secondary batteries directly affect the market competitiveness of these terminal products and the consumer experience. As an important component of secondary batteries, the battery cover not only bears the responsibility of sealing the battery cavity and protecting the internal structure of the battery, but also bears the function of connecting the battery to the external circuit. Its design and manufacturing quality have a crucial impact on the overall performance of the battery.

[0003] Traditionally, the terminal design on the battery cover is often customized according to specific battery models or customer needs, which leads to the need to frequently change molds and adjust production lines during the production process, greatly increasing production costs and production cycles. In addition, the non-standardized terminal design also makes the battery face compatibility issues during subsequent assembly, testing and maintenance, which is not conducive to the standardization and modular development of battery systems. On the other hand, the production of customized terminals often requires high-precision processing equipment and complex process flows, which not only increases production costs, but also limits the improvement of production efficiency. At the same time, due to the wide variety of terminals, inventory management becomes complicated, increasing the operational burden of enterprises.

[0004] In view of the above problems, the industry urgently needs a battery cover terminal design solution that can simplify the production process, reduce production costs, improve production efficiency and enhance product compatibility. Summary of the invention

[0005] The purpose of the present invention is to provide a standard terminal to solve the problems of high production cost and long production cycle caused by the customized development of traditional terminals, while solving the compatibility problems faced in the subsequent assembly, testing and maintenance processes, and also solving the problem of low production efficiency.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] Standard terminals, including:

[0008] Lower aluminum ring;

[0009] A sealing ring, arranged on the lower aluminum ring;

[0010] A pole, arranged on the top of the sealing ring, comprising an upper end and a lower end, wherein the outer diameter of the axial surface of the lower end is greater than the outer diameter of the axial surface of the upper end, and the axial surface of the lower end is a conical structure that contracts from top to bottom;

[0011] An upper aluminum ring, arranged on the lower aluminum ring, fixing the pole;

[0012] The injection molding layer covers the outer surfaces of the upper aluminum ring and the pole to isolate the upper aluminum ring and the pole.

[0013] Preferably, an isolation layer is provided between the pole and the upper aluminum ring.

[0014] Preferably, the isolation layer is made of ceramic material, mica sheet or hard plastic.

[0015] Preferably, the lower aluminum ring has a step structure, and the number of step layers is 1 to 3.

[0016] Preferably, a through hole is opened in the middle of the lower aluminum ring.

[0017] Preferably, a stopper portion extends downward from the lower end of the sealing ring, and the stopper portion extends into the through hole.

[0018] Preferably, the axial surface of the sealing ring and the axial surface of the stopper are both provided with a gap with the matching surface of the lower aluminum ring.

[0019] Preferably, the cross section of the pole is an inverted T-shape;

[0020] Alternatively, a boss extends from the bottom surface of the lower end of the pole, and its cross section is cross-shaped.

[0021] Preferably, the electrode column is a positive electrode column or a negative electrode column, wherein the positive electrode column is made of aluminum and the negative electrode column is made of a copper-aluminum composite material.

[0022] Preferably, the upper end of the negative electrode column is made of aluminum, and the lower end is made of copper.

[0023] Preferably, the cross section of the upper aluminum ring is in a Z-shaped structure.

[0024] Preferably, the upper portion of the upper aluminum ring is in contact with the upper end of the isolation layer, and the lower portion of the upper aluminum ring is in contact with the lower aluminum ring.

[0025] Preferably, the injection molding layer is suitable for filling the space between the upper portion of the upper aluminum ring and the upper end portion of the pole.

[0026] Preferably, the injection-molded layer is formed by injection molding of insulating material or weakly conductive material.

[0027] Preferably, the insulating material is suitable for a standard terminal of the pole made of a copper-aluminum composite material or an aluminum material.

[0028] Preferably, the weakly conductive material is suitable for a standard terminal of the pole made of aluminum.

[0029] Preferably, the cover plate uses the above-mentioned standard terminals.

[0030] Preferably, the secondary battery uses the above-mentioned cover plate.

[0031] Compared with the prior art, the invention has the following beneficial effects: through the standardized design of the terminal, not only can the number of mold changes be reduced, but also the number of molds for different types of battery cover plates can be reduced, the production line configuration can be optimized, and the standardized production of terminal components can be promoted, and the scale effect can be used to further reduce costs and enhance market competitiveness. In addition, the standardized design also helps to simplify the battery assembly process, improve assembly efficiency, and reduce the failure rate caused by terminal mismatch, thereby improving the overall quality and reliability of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0034] In the figure: 1, pole; 2, lower aluminum ring; 3, sealing ring; 4, injection molding layer; 5, upper aluminum ring; 1-1, isolation layer. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1

[0037] like Figure 1 As shown, a standard terminal includes a pole 1, a lower aluminum ring 2, a sealing ring 3, an injection molding layer 4 and an upper aluminum ring 5, wherein the sealing ring 3 is arranged in the middle of the lower aluminum ring 2, and the pole 1 is arranged on the top of the sealing ring 3, and the pole 1 includes an upper end and a lower end, the outer diameter of the outer axial surface of the lower end is greater than the outer diameter of the outer axial surface of the upper end, the top of the lower aluminum ring 2 is provided with an upper aluminum ring 5 for fixing the pole 1, and the outer surfaces of the upper aluminum ring 5 and the pole 1 are coated with an injection molding layer 4 for physically isolating the upper aluminum ring 5 and the pole 1.

[0038] The standard terminal of this embodiment is used on a secondary battery, adapted to batteries of different models and battery covers of different sizes, and the standard terminal of this embodiment is processed separately.

[0039] In this embodiment, the terminals on various types of battery covers are standardized and peeled off by setting standard terminals, thereby simplifying the production process of the battery covers. During production, the battery covers do not need to be processed for the terminal-related structures, and only the connection port structure for connecting the standard terminals of this embodiment needs to be processed. In addition, due to the standardization of the terminals, there is no need to perform different processing and assembly for different types of terminals, thereby simplifying the production process and improving production efficiency.

[0040] At the same time, the standardized design and separate processing of the standard terminals in this embodiment can not only reduce the number of mold changes and optimize the production line configuration, but also promote the standardized production of terminal components, further reduce costs and enhance market competitiveness by using economies of scale. In addition, the standardized design also helps to simplify the battery assembly process, improve assembly efficiency, and reduce the failure rate caused by terminal mismatch, thereby improving the overall quality and reliability of the battery system. Compared with traditional terminal injection molding, the standard terminals in this embodiment do not need to be combined with the battery cover for injection molding, which improves the space utilization of the injection mold cavity, increases the number of single injection cavities, and is more efficient, thereby reducing costs.

[0041] Moreover, standard terminals can ensure that the terminals on all battery covers using the terminals have the same quality and performance, thereby improving the overall consistency of the product. Furthermore, the connection reliability and electrical performance of the terminals that have undergone standardized design and processing will be significantly improved, thereby enhancing the reliability of the battery cover and further improving the reliability of the corresponding battery.

[0042] Furthermore, the standardized terminals make it easier for maintenance personnel to identify and replace damaged terminals, thereby simplifying the maintenance process, and since the standard terminals can be processed and replaced individually, there is no need to replace the entire battery cover, thereby reducing maintenance costs.

[0043] Embodiment 2

[0044] like Figure 1 As shown, the difference from the first embodiment is that in this embodiment, an isolation layer 1-1 is provided between the pole 1 and the upper aluminum ring 5, and the isolation layer 1-1 is made of ceramic material, mica sheet or hard plastic, has good heat resistance and insulation performance, insulates the upper aluminum ring 5 and the pole 1, and is injection molded on the pole 1 by injection molding, so as to play a heat insulation role, thereby solving the airtightness problem caused by aging of the sealing ring 3, and at the same time, adding the isolation layer 1-1 can also enhance the safety performance.

[0045] It is worth noting that the axial surface of the lower end of the pole 1 is a conical structure that converges from top to bottom, forming an undercut, which improves the adhesion of the plastic part when the isolation layer 1-1 is injection-molded and prevents the isolation layer 1-1 from falling off.

[0046] Embodiment 3

[0047] like Figure 1 As shown, the difference from Example 1 and Example 2 is that, in this embodiment, the lower aluminum ring 2 is provided with a step structure, the lower aluminum ring 2 is made of aluminum, and the step structure is formed by stamping, the sealing ring 3 and the upper aluminum ring 5 are installed in cooperation with different step surfaces to avoid mutual interference between the two assemblies, thereby ensuring the stability of the installation, and at the same time, through the stepped assembly, the matching relationship and position between the various parts are optimized, the size of the standard terminal is reduced, and the material cost is saved, and the step structure at the bottom of the lower aluminum ring 2 is used for welding with various types of battery cover plates to achieve stable installation of the standard terminal.

[0048] It is worth noting that the number of step layers punched by the lower aluminum ring 2 is 1 to 3, which is designed according to actual production needs. A through hole is also opened in the middle of the lower aluminum ring 2 to meet actual needs.

[0049] Embodiment 4

[0050] like Figure 1 As shown, the difference from Example 1 or Example 2 or Example 3 is that, in this embodiment, a stopper portion extends downward from the lower end of the sealing ring 3, and the stopper portion extends into the through hole. The stopper portion can be used to limit the position between the sealing ring 3 and the lower aluminum ring 2, while also improving the sealing performance.

[0051] It is worth noting that the axial surface of the sealing ring 3 and the axial surface of the stopper are both provided with a clearance between the mating surface of the lower aluminum ring 2, thereby satisfying the deformation space requirement of the sealing ring 3 during assembly and extrusion, and further ensuring the sealing performance.

[0052] Embodiment 5

[0053] like Figure 1 As shown, the difference from the first embodiment, the second embodiment, the third embodiment or the fourth embodiment is that in this embodiment, the cross section of the pole 1 is an inverted T-shape, or the bottom surface of the lower end of the pole 1 further extends a boss, and its cross section is cross-shaped.

[0054] Furthermore, the pole 1 includes a positive pole and a negative pole. The type of pole 1 is set in the standard terminal according to actual needs, wherein the positive pole is made of aluminum, and the negative pole is made of a copper-aluminum composite material. The upper end of the negative pole is made of aluminum, and the lower end is made of copper, which is convenient for welding with the negative electrode cell (copper material).

[0055] Embodiment 6

[0056] like Figure 1As shown, the difference from Example 1 or Example 2 or Example 3 or Example 4 or Example 5 is that, in this embodiment, the cross-section of the upper aluminum ring 5 is a Z-shaped structure, through which it can stably fit with the step surface of the lower aluminum ring 2, and can also stably press the isolation layer 1-1.

[0057] It is worth noting that in this embodiment, the upper part of the Z-shaped structure of the upper aluminum ring 5 fits with the upper end of the isolation layer 1-1, and the lower part of the Z-shaped structure of the upper aluminum ring 5 fits with the step surface of the lower aluminum ring 2, achieving stable support and compression.

[0058] Embodiment 7

[0059] like Figure 1 As shown, the difference from the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, or the sixth embodiment is that in this embodiment, the space between the upper portion of the upper aluminum ring 5 and the upper end portion of the pole 1 is suitable for filling the injection molding layer 4, which improves the adhesion of the injection molding layer 4 and at the same time provides heat insulation for the pole 1.

[0060] Furthermore, it should be noted that the injection molding layer 4 can be formed by injection molding of insulating material or weakly conductive material, wherein the insulating material is suitable for the standard terminal of the pole 1 made of copper-aluminum composite material or aluminum, and the weakly conductive material is suitable for the standard terminal of the pole 1 made of aluminum.

[0061] Embodiment 8

[0062] The present embodiment provides a cover plate, which uses any one of the standard terminals in the above-mentioned embodiments one to seven. Since the standard terminals are used, the cover plate in the present embodiment only needs to process the corresponding connection ports, and the standard terminals are welded at the corresponding positions by laser welding, and cover plates of different sizes can be adapted to the standard terminals.

[0063] Embodiment 9

[0064] This embodiment provides a secondary battery, which uses the cover plate with standard terminals in the eighth embodiment to improve the reliability of the secondary battery.

[0065] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. Standard terminal, characterized in that: include: Lower aluminum ring (2); A sealing ring (3) is arranged on the lower aluminum ring (2); A pole (1) is arranged on the top of the sealing ring (3), the pole (1) comprising an upper end and a lower end, the outer diameter of the axial surface of the lower end is larger than the outer diameter of the axial surface of the upper end, and the axial surface of the lower end presents a conical structure that contracts from top to bottom; An upper aluminum ring (5) is arranged on the lower aluminum ring (2) to fix the pole (1); The injection molding layer (4) is coated on the outer surfaces of the upper aluminum ring (5) and the pole (1), isolating the upper aluminum ring (5) and the pole (1).

2. The standard terminal according to claim 1, characterized in that: An isolation layer (1-1) is provided between the pole (1) and the upper aluminum ring (5).

3. The standard terminal according to claim 2, characterized in that: The isolation layer (1-1) is made of ceramic material, mica sheet or hard plastic.

4. The standard terminal according to claim 1 or 2, characterized in that: The lower aluminum ring (2) has a step structure, and the number of step layers is 1 to 3.

5. The standard terminal according to claim 1 or 2, characterized in that: A through hole is provided in the middle of the lower aluminum ring (2).

6. The standard terminal according to claim 5, characterized in that: A stopper portion extends downwardly from the lower end of the sealing ring (3), and the stopper portion extends into the through hole.

7. The standard terminal according to claim 6, characterized in that: The axial surface of the sealing ring (3) and the axial surface of the stopper are both provided with a clearance between themselves and the matching surface of the lower aluminum ring (2).

8. The standard terminal according to claim 1 or 2, characterized in that: The cross section of the pole (1) is an inverted T-shape; Alternatively, a boss extends from the bottom surface of the lower end of the pole (1), and its cross section is cross-shaped.

9. The standard terminal according to claim 8, characterized in that: The pole (1) is a positive pole or a negative pole, wherein the positive pole is made of aluminum and the negative pole is made of a copper-aluminum composite material.

10. The standard terminal according to claim 9, characterized in that: The upper end of the negative pole is made of aluminum, and the lower end is made of copper.

11. The standard terminal according to claim 2, characterized in that: The cross section of the upper aluminum ring (5) is in a Z-shaped structure.

12. The standard terminal according to claim 11, characterized in that: The upper portion of the upper aluminum ring (5) is in contact with the upper end of the isolation layer (1-1), and the lower portion of the upper aluminum ring (5) is in contact with the lower aluminum ring (2).

13. The standard terminal according to claim 11, characterized in that: The space between the upper portion of the upper aluminum ring (5) and the upper end portion of the pole (1) is suitable for being filled with the injection molding layer (4).

14. The standard terminal according to claim 10, characterized in that: The injection-molded layer (4) is formed by injection molding of insulating material or weakly conductive material.

15. The standard terminal according to claim 14, characterized in that: The insulating material is suitable for a standard terminal of the pole (1) made of a copper-aluminum composite material or an aluminum material.

16. The standard terminal according to claim 14, characterized in that: The weakly conductive material is suitable for a standard terminal of the pole (1) made of aluminum.

17. A cover plate, characterized in that: Use the standard terminal as claimed in any one of claims 1 to 16.

18. A secondary battery, characterized in that: Use of the cover plate as claimed in claim 17.

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