Standard terminal, cover plate and secondary battery

Abstract

The utility model belongs to the technical field of power batteries, and particularly discloses a standard terminal, which comprises a pole, an aluminum ring, a sealing ring, an injection molding layer and a compression ring, the pole is in close contact with the top surface of the sealing ring, the sealing ring is arranged in the aluminum ring, and the top surface of the inner side of the aluminum ring is provided with an annular mounting notch matched with the compression ring. According to the standard terminal, the cover plate and the secondary battery provided by the utility model, the production process of the terminal can be simplified, the generality and interchangeability of the terminal can be improved and the production cost of the terminal can be reduced through the standardized design of the terminal; through the arrangement of the injection molding layer, the pole and the pressing ring are physically isolated, and the performance of the standard terminal is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, and in particular relates to a standard terminal, cover plate and secondary battery. Background Technology

[0002] Power batteries include lithium-ion batteries, nickel-metal hydride batteries, and lead-acid batteries, which store and release electrical energy through chemical reactions.

[0003] The battery cover is one of the key components of a power battery, playing a crucial role in the battery pack. The pack process refers to the manufacturing method of connecting multiple batteries in series to form a specific shape, capacity, and voltage according to customer requirements. The battery cover has a relatively complex structure, composed of multiple parts that work together to achieve functions such as fixing, sealing, current conduction, pressure relief, and fuse protection of the battery pack.

[0004] In battery modules, battery terminals are mounted on a cover plate. The terminals are used for external connections to the battery, while the cover plate protects the internal structure. Battery terminals typically include posts, aluminum rings, sealing rings, and pressure rings. With the expanding applications of power batteries, and driven by market competition and customization needs, the variety of battery terminal models is increasing. This necessitates specialized design and manufacturing for different models during battery terminal production, thereby increasing research and development and production costs.

[0005] Furthermore, during the assembly of the battery terminals, the sealing ring is placed inside the aluminum ring, the terminal post is placed on the sealing ring, and the pressure ring is placed on the aluminum ring. Due to the gaps between the terminal post, aluminum ring, sealing ring, and pressure ring, the connection is not firm. In actual use, the pressure ring may come into contact with the terminal post, which will affect the conductivity of the terminal. Utility Model Content

[0006] The purpose of this utility model is to overcome the above-mentioned problems in the prior art and provide a standard terminal. By standardizing the design of the terminal, the production process of the terminal can be simplified, its versatility and interchangeability can be improved, and its production cost can be reduced. By setting the injection molding layer, the pole and the pressure ring are physically isolated to ensure the performance of the standard terminal.

[0007] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0008] In a first aspect, this utility model provides a standard terminal, including a pole, an aluminum ring, a sealing ring, an injection molding layer, and a pressure ring. The pole is in close contact with the top surface of the sealing ring, the sealing ring is disposed inside the aluminum ring, and the inner top surface of the aluminum ring has an annular mounting notch that cooperates with the pressure ring.

[0009] A gap is formed between the pole, aluminum ring, pressure ring and sealing ring, and the injection molding layer is formed on the outside of the pole and aluminum ring by injection molding, and fills the gap.

[0010] Furthermore, an isolation layer is provided on the outer circumferential surface of the pole post.

[0011] Furthermore, the material of the isolation layer is any one of ceramic material, mica sheet, or rigid plastic.

[0012] Furthermore, the insulating layer can be formed on the outside of the pole by injection molding.

[0013] Furthermore, the vertical cross-section of the pole is inverted T-shaped or cross-shaped.

[0014] Furthermore, a multi-stage stepped structure with progressively increasing diameter is provided starting from the lower end of the inner surface of the aluminum ring.

[0015] The bottom of the sealing ring is provided with a multi-stage sealing groove that matches the multi-stage stepped structure.

[0016] Furthermore, the lower end of the outer side of the pole piece mates with the upper end of the inner side of the sealing ring.

[0017] Furthermore, the cross-section of the aluminum ring is Z-shaped;

[0018] A through hole is provided at the center of the bottom of the aluminum ring.

[0019] Secondly, the present invention provides a cover plate including the standard terminal provided in the embodiments of the first aspect of the present invention.

[0020] Thirdly, the present invention provides a secondary battery, including the cover plate provided in the embodiment of the second aspect of the present invention.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. The standard terminal provided by this utility model has a standardized design. When applied to the battery cover, only the connection structure of the standard terminal needs to be processed on the battery cover. No other assembly process is required, which simplifies the production steps and improves production efficiency.

[0023] 2. This utility model provides a standard terminal in which an injection molding layer is formed to encapsulate the sealing ring and the terminal post within an aluminum ring. The injection molding layer physically isolates the terminal post from the pressure ring, thereby preventing the pressure ring from contacting the terminal post and affecting the conductivity of the terminal post. In addition, this design makes the structure of the components of the standard terminal compact, improving the connection density and reliability between the components while also improving the durability and service life of the standard terminal.

[0024] 3. In this utility model, an isolation layer is provided around the electrode post. By setting the isolation layer and the injection molding layer, the outside of the electrode post is partially covered. This not only prevents the electrode post from loosening and extends its service life, but also effectively prevents short circuits caused by loosening or wear of the electrode post during battery use.

[0025] 4. In this utility model, the vertical cross section of the pole is inverted T-shaped or cross-shaped. The pole, aluminum ring, sealing ring and pressure ring form a gap for injection molding. The injection molding layer fills the gap to ensure the sealing effect. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 This is a structural cross-sectional view of the present invention;

[0028] Figure 2 This is an exploded view of the structure of this utility model;

[0029] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0030] Figure 4 This is a schematic diagram of the installation structure of the aluminum ring and sealing ring of this utility model;

[0031] Figure 5 This is a schematic diagram of the installation structure of the pole and the isolation layer of this utility model;

[0032] Figure 6 This is a schematic diagram of the sealing ring of this utility model;

[0033] Figure 7 This is a front view of the sealing ring of this utility model.

[0034] The attached diagram is labeled as follows: 1. pole post; 2. aluminum ring; 3. sealing ring; 4. injection molding layer; 5. pressure ring; 20. annular mounting notch; 100. gap; 11. isolation layer; 21. stepped structure; 31. sealing groove. Detailed Implementation

[0035] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] In battery modules, battery terminals are mounted on a cover plate. The terminals are used for external connections to the battery, while the cover plate protects the internal structure. Battery terminals typically include posts, aluminum rings, sealing rings, and pressure rings. With the expanding applications of power batteries, and driven by market competition and customization needs, the variety of battery terminal models is increasing. This necessitates specialized design and manufacturing for different models during battery terminal production, thereby increasing research and development and production costs.

[0038] Furthermore, during the assembly of the battery terminals, the sealing ring is placed inside the aluminum ring, the terminal post is placed on the sealing ring, and the pressure ring is placed on the aluminum ring. Due to the gaps between the terminal post, aluminum ring, sealing ring, and pressure ring, the connection is not firm. In actual use, situations such as the pressure ring contacting the terminal post and misalignment of various components may occur, thereby affecting the performance of the terminal.

[0039] like Figures 1 to 4 As shown, this utility model provides a standard terminal, comprising:

[0040] Pole post 1, the vertical cross section of pole post 1 is inverted T-shaped or cross-shaped;

[0041] The sealing ring 3 and the pole post 1 are disposed on the sealing ring 3, with the bottom of the pole post 1 in close contact with the top of the sealing ring 3;

[0042] Pressure ring 5, the shape of pressure ring 5 is circular;

[0043] Aluminum ring 2 has a Z-shaped cross-section and is used to accommodate sealing ring 3. An annular mounting notch 20 that mates with pressure ring 5 is provided on the inner top surface of aluminum ring 2. In addition, a through hole is provided in the center of the bottom of aluminum ring 2 to meet actual installation needs.

[0044] The injection molding layer 4 forms a gap 100 between the pole post 1, aluminum ring 2, pressure ring 5 and sealing ring 3. The injection molding layer 4 is formed on the outside of the pole post 1 and aluminum ring 2 by injection molding and fills the gap 100.

[0045] The Z-shaped cross-section design of the aluminum ring 2 provides more stable support for the sealing ring 3 while tightening the injection molding layer 4, ensuring the overall stability of the standard terminal structure.

[0046] like Figures 1 to 4 As shown, in one embodiment of this utility model, the electrode post 1 can be made of aluminum. When the electrode post 1 made of aluminum is applied to the standard terminal, the material used for the injection molding layer 4 on the standard terminal is a weakly conductive material or an insulating material.

[0047] like Figures 1 to 4 As shown, in one embodiment of this utility model, the electrode post 1 can be made of copper-aluminum composite material. Specifically, the electrode post 1 includes an upper layer and a lower layer. The upper layer of the electrode post 1 contains aluminum material, and the lower layer of the electrode post 1 contains copper material. When the electrode post 1 is made of copper-aluminum composite material, when the electrode post 1 is applied to the standard terminal, the material used for the injection molding layer 4 on the standard terminal is an insulating material.

[0048] like Figures 1 to 7 As shown, in one embodiment of this utility model, a multi-stage stepped structure 21 with progressively increasing diameter is provided starting from the lower end of the inner surface of the aluminum ring 2; the bottom of the sealing ring 3 is provided with a multi-stage sealing groove 31 that cooperates with the multi-stage stepped structure 21.

[0049] The stepped structure 21 has 1 to 6 levels;

[0050] The multi-stage stepped structure 21 ensures both compatibility between the sealing ring 3 and the aluminum ring 2 and better guarantees the tightness of the press-fit between them.

[0051] like Figures 1 to 4 As shown, in one embodiment of this utility model, the lower end of the outer side of the pole post 1 is engaged with the upper inner side of the sealing ring 3;

[0052] Specifically, after the standard terminal is actually installed, the lower end of the outer part of the pole post 1 can be tightly placed inside the upper end of the sealing ring 3, and the two are in close contact.

[0053] like Figure 5 As shown, in one embodiment of the present invention, an isolation layer 11 may be provided on the outer circumferential surface of the pole post 1. Specifically, an isolation layer 11 is provided between the outer circumferential surface of the pole post 1 and the aluminum ring 2, thereby forming an insulating isolation between the pole post 1 and the aluminum ring 2.

[0054] like Figure 1 As shown, in one embodiment of this utility model, the isolation layer 11 can be integrated with the pole post 1 by injection molding; specifically, when the isolation layer 11 is formed on the outside of the pole post 1 by injection molding, the material of the isolation layer 11 can be rigid plastic.

[0055] like Figures 1 to 4As shown, in one embodiment of this utility model, the material of the isolation layer 11 includes, but is not limited to, any one of ceramic materials, mica sheets, and rigid plastics.

[0056] This utility model also provides a cover plate, including the aforementioned standard terminal. The standard terminal here includes all the technical features of the aforementioned standard terminal. The cover plate here only needs to be processed with a connection structure corresponding to the aforementioned standard terminal. The standard terminal can be welded to the corresponding position by welding or other methods to achieve the adaptation of the standard terminal with cover plates of different specifications.

[0057] This utility model also provides a secondary battery, including the aforementioned cover plate, wherein the cover plate includes all the technical features of the aforementioned cover plate.

[0058] This utility model provides a standard terminal, which standardizes the terminals on the battery cover, making it suitable for use with battery covers of different specifications. This simplifies the production process of the battery cover, thereby simplifying the assembly process of the secondary battery and improving its production efficiency.

[0059] This invention provides a standard terminal in which an injection molding layer 4 is formed to encapsulate a sealing ring 3 and a terminal post 1 within an aluminum ring 2. The injection molding layer 4 physically isolates the terminal post 1 from the pressure ring 5, thereby preventing the pressure ring 5 from contacting the terminal post 1 and affecting its conductivity. Furthermore, this design helps to optimize the structure of the standard terminal, making the components of the standard terminal more compact, improving the connection density and reliability between the components, and thus improving the durability and service life of the standard terminal.

[0060] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms 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.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A standard terminal, characterized in that, It includes a pole (1), an aluminum ring (2), a sealing ring (3), an injection molding layer (4), and a pressure ring (5). The pole (1) is in close contact with the top surface of the sealing ring (3). The sealing ring (3) is located inside the aluminum ring (2). The top surface of the inner side of the aluminum ring (2) has an annular mounting notch (20) that matches the pressure ring (5). A gap (100) is formed between the pole post (1), aluminum ring (2), pressure ring (5) and sealing ring (3). The injection molding layer (4) is formed on the outside of the pole post (1) and aluminum ring (2) by injection molding and fills the gap (100).

2. A standard terminal according to claim 1, characterized in that, The outer circumferential surface of the pole (1) is provided with an isolation layer (11).

3. A standard terminal according to claim 2, characterized in that, The material of the isolation layer (11) is any one of ceramic material, mica sheet, or hard plastic.

4. A standard terminal according to claim 2, characterized in that, The isolation layer (11) can be formed on the outside of the pole (1) by injection molding.

5. A standard terminal according to claim 1, characterized in that, The vertical cross section of the pole (1) is inverted T-shaped or cross-shaped.

6. A standard terminal according to claim 1, characterized in that, Starting from the lower end of the inner surface of the aluminum ring (2), there is a multi-stage stepped structure (21) with the diameter increasing sequentially upwards. The bottom of the sealing ring (3) is provided with a multi-level sealing groove (31) that cooperates with the multi-level stepped structure (21).

7. A standard terminal according to claim 1, characterized in that, The lower end of the pole (1) is fitted with the upper end of the sealing ring (3).

8. A standard terminal according to claim 1, characterized in that, The cross-section of the aluminum ring (2) is Z-shaped; The aluminum ring (2) has a through hole at the center of its bottom.

9. A cover plate, characterized in that, Includes the standard terminal as described in any one of claims 1 to 8.

10. A secondary battery, characterized in that, Includes the cover plate as described in claim 9.

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