A low resistance lithium battery connection terminal

Abstract

A low-resistance lithium battery connecting terminal belongs to the technical field of connecting terminals, and aims to solve the problems of insufficient conductivity and high cost of existing lithium battery connecting terminals. The technical points are as follows: a detachable connecting column is arranged in the center of an insulating substrate, the wide head end of the connecting column has an internal threaded groove, the other end of the connecting column is sleeved with a cable with an annular connector and is locked by a fastening nut; the connecting column and the fastening nut are made of high-purity oxygen-free copper conductive base material, the surface of which is electroplated with a high-conductivity silver layer, and the surface of the high-conductivity layer is vapor-deposited with an extremely thin diamond-like coating film as a wear-resistant protective layer; the insulating substrate is detachably provided with a protective assembly. This structure reduces the terminal resistance, efficiently and safely transmits current, protects the high-conductivity layer to prolong the service life, and each component is detachable, facilitating installation, maintenance and replacement, and the insulating substrate and the protective cover enhance the safety in use.

Description

Technical Field

[0001] This utility model relates to the field of agricultural fertilization technology, and in particular to a low-resistance lithium battery connection terminal. Background Technology

[0002] Lithium battery connectors are components used to connect lithium batteries to external circuits. Their main function is to transmit electrical signals or conduct electricity. Their core function is to efficiently and safely transmit current while ensuring the stability and durability of the connection.

[0003] Currently, most lithium battery connectors on the market are made of pure copper. Although pure copper has a certain conductivity, its conductivity is still insufficient in some scenarios where current transmission efficiency is required. If other low-resistance rare metals are used as the base material, the conductivity can be improved, but the cost will increase significantly, which limits the widespread application of the product.

[0004] To address the aforementioned issues, this utility model proposes a low-resistance lithium battery connection terminal. Utility Model Content

[0005] This invention provides a low-resistance lithium battery connection terminal, which solves the problem that most lithium battery connection terminals in the prior art are made of pure copper. Although pure copper has a certain conductivity, its conductivity is still insufficient in some scenarios where the current transmission efficiency is required. If other low-resistance rare metals are used as the base material, although the conductivity can be improved, the cost will increase significantly, which limits the widespread application of the product.

[0006] This utility model provides the following technical solution:

[0007] A low-resistance lithium battery connector, comprising:

[0008] An insulating substrate, wherein a connecting post is detachably provided in the center of the insulating substrate, and an internal thread groove is provided in the center of the wide end of the connecting post for threaded connection with the threaded head of a cable. A cable with an annular connector is sleeved on the other end of the connecting post, and a fastening nut for locking the position of the cable with the annular connector is threaded on the connecting post. A protective component is detachably provided on the insulating substrate.

[0009] Both the connecting post and the fastening nut are made of high-purity oxygen-free copper conductive substrate. The surface of the conductive substrate is electroplated with a highly conductive layer, and the surface of the highly conductive layer is coated with a wear-resistant protective layer by vapor deposition.

[0010] In one possible design, the connecting post is threadedly connected to an internally threaded hole in the center of the insulating substrate via an external thread on its outer wall.

[0011] In one possible design, the insulating substrate has pre-drilled holes at each of its four corners for mounting and fixing with bolts.

[0012] In one possible design, the protective assembly includes an insulating protective cover that covers the connecting post, the insulating protective cover having a through hole in the center for the end of the connecting post to pass through, and notches at the edges of the insulating protective cover for a cable with a ring connector to pass through, the end of the connecting post passing through the through hole and being threaded with a matching insulating cap.

[0013] In one possible design, the highly conductive layer is made of silver.

[0014] In one possible design, the wear-resistant protective layer is a diamond-like carbon coating film.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0016] The working principle and usage process of this technical solution are as follows:

[0017] During installation, the connecting post is threaded into the internal threaded hole in the center of the insulating substrate via the external thread on its outer wall, thus completing the detachable installation of the connecting post on the insulating substrate. Then, using the pre-drilled holes at the four corners of the insulating substrate, the insulating substrate is fixed in the designated position with bolts. For cables with threaded heads, the threaded head is screwed into the internal threaded groove in the center of the wide end of the connecting post. For cables with ring connectors, the cable is placed on the other end of the connecting post, and then a fastening nut is threaded onto the connecting post to lock the position of the cable with the ring connector. After that, the insulating protective cover is placed over the connecting post, so that the end of the connecting post passes through the through hole in the center of the insulating protective cover, allowing the cable with the ring connector to pass through the notch at the edge of the insulating protective cover. Finally, a matching insulating cap is threaded onto the end of the connecting post.

[0018] During the charging and discharging of lithium batteries, the current is efficiently transmitted through the highly conductive layer (silver) of the connecting post and the conductive substrate (oxygen-free copper). The diamond-like carbon coating film reduces wear on the contact surface, and the insulating substrate and protective cover isolate the charged components to prevent short circuits. In addition, the diamond-like carbon coating film blocks corrosive gases such as sulfides and chlorine, extending the life of the silver layer.

[0019] This utility model has the following beneficial effects:

[0020] In this invention, the connecting post and fastening nut are made of high-purity oxygen-free copper conductive substrate, with a highly conductive silver electroplated layer on the surface. This combination effectively reduces the resistance of the terminals, enabling efficient and safe current transmission and meeting the core functional requirements of lithium battery connection terminals.

[0021] This invention uses a diamond-like coating film deposited by vapor deposition on the surface of a highly conductive layer as a wear-resistant protective layer. The extremely thin film thickness protects the highly conductive layer, extends the service life of the terminal, and does not significantly affect the conductivity of the terminal.

[0022] In this invention, the connecting column and the insulating base plate, the insulating base plate and the external mounting position, and the protective components and the connecting column are all detachable, which facilitates installation, maintenance and replacement of parts; the insulating base plate and the insulating protective cover provide good insulation performance and enhance safety during use. Attached Figure Description

[0023] Figure 1 A three-dimensional structural schematic diagram of a low-resistance lithium battery connection terminal provided for an embodiment of this utility model;

[0024] Figure 2 A schematic diagram of the disassembly structure of a low-resistance lithium battery connection terminal provided in an embodiment of this utility model;

[0025] Figure 3 A schematic diagram of a low-resistance lithium battery connection terminal with a separation structure between the connecting post and the insulating substrate provided in an embodiment of this utility model;

[0026] Figure 4 A partial cross-sectional view of a low-resistance lithium battery connection terminal in the connected cable state, provided for an embodiment of this utility model.

[0027] Figure 5 This is a partial cross-sectional planar structural diagram of the connecting post of a low-resistance lithium battery connection terminal provided in an embodiment of the present invention.

[0028] Reference numerals: 1. Insulating substrate; 2. Internal threaded hole; 3. Connecting post; 4. External thread; 5. Reserved hole; 6. Internal threaded groove; 7. Fastening nut; 8. Insulating protective cover; 9. Through hole; 10. Notch; 11. Insulating cap; 12. Conductive substrate; 13. Highly conductive layer; 14. Wear-resistant protective layer. Detailed Implementation

[0029] 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.

[0030] In the description of this utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate 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.

[0031] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0032] In one embodiment:

[0033] Please refer to Figure 1-5 A connection terminal includes an insulating substrate 1, a connecting post 3, a fastening nut 7, a protective component, and related conductive and protective structures.

[0034] The insulating substrate 1, made of high-temperature resistant engineering plastic, is rectangular in shape, with circular pre-drilled holes 5 at each of its four corners. By passing an M4 bolt through the pre-drilled holes 5, the insulating substrate 1 can be installed and fixed in a designated plane position, achieving a detachable connection with an external installation position. The insulating substrate 1 has an internal threaded hole 2 in the center for connecting to a connecting post 3.

[0035] The connecting post 3 is made of TU1 grade high-purity oxygen-free copper conductive substrate 12, which is cold-forged and then annealed. The main body of the connecting post 3 is cylindrical, and a wide-head sealing piece is integrally formed at the end. The outer wall of the connecting post 3 is machined with an external thread 4 that matches the internal thread hole 2. The connecting post 3 can be vertically fixed to the center of the insulating substrate 1 by rotation, thus completing the detachable setting of the connecting post 3 on the insulating substrate 1. The center of the wide end of the connecting post 3 is provided with an internal thread groove 6 for threaded connection with the cable thread head. For cables with thread heads, the thread head can be screwed into the internal thread groove 6 to achieve connection. The other end of the connecting post 3 is used to fit a cable with a ring connector. Then, the fastening nut 7 is threaded onto the connecting post 3. The fastening nut 7 is also made of TU1 grade high-purity oxygen-free copper conductive substrate 12. The position of the cable with the ring connector can be locked by fastening the nut 7.

[0036] A 0.01 mm thick highly conductive layer 13 is formed on the surface of the conductive substrate 12 connecting the post 3 and the fastening nut 7 through an electroplating process. The electroplating solution adopts a cyanide silver plating system. The highly conductive silver layer 13 can effectively reduce the resistance of the terminal and improve the current transmission efficiency. A wear-resistant protective layer 14 is deposited on the surface of the highly conductive layer 13 using a pulsed DC magnetron sputtering process. The deposition temperature is controlled at 150℃ and the film thickness is 0.002 mm. Raman spectroscopy confirms that a diamond-like structure with sp³ bonds as the main component is formed. The diamond-like coating film can not only reduce contact surface wear and extend the service life of the terminal, but also block corrosive gases such as sulfides and chlorine, protect the highly conductive silver layer 13, extend its service life, and the extremely thin film thickness will not significantly affect the conductivity of the terminal.

[0037] During the charging and discharging process of the lithium battery, the current is efficiently transmitted through the highly conductive layer 13 (silver) of the connecting post 3 and the conductive substrate 12 (oxygen-free copper). The diamond-like coating reduces fretting wear at the contact interface. At the same time, the connecting post 3 and the insulating substrate 1, as well as the insulating substrate 1 and the external mounting position, are all detachable, which facilitates the installation, maintenance and replacement of components.

[0038] This application can be used for lithium battery connection terminals, or for other fields applicable to this application.

[0039] In another embodiment:

[0040] A low-resistance lithium battery connection terminal, which is used in the field of connection terminals;

[0041] Please refer to Figure 1-2 and Figure 5 A protective component is detachably mounted on the insulating substrate 1. The protective component includes an insulating protective cover 8 made of flame-retardant PC material, which covers the connecting post 3. A through hole 9 is provided in the center of the insulating protective cover 8, and the end of the connecting post 3 passes through the through hole 9. A U-shaped notch 10 is provided at the edge of the insulating protective cover 8 for a cable with a ring connector to pass through. After the end of the connecting post 3 passes through the through hole 9, a matching PA66 insulating cap 11 is threadedly connected to achieve a detachable connection between the protective component and the connecting post 3. The insulating substrate 1 and the insulating protective cover 8 serve to isolate live parts, prevent short circuits, provide good insulation performance, and enhance safety during use.

[0042] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0043] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A low-resistance lithium battery connection terminal, characterized in that, include: An insulating substrate (1) is provided with a connecting post (3) detachably in the center of the insulating substrate (1). The connecting post (3) has an internal thread groove (6) at the center of its wide end for threaded connection with a cable thread head. The other end of the connecting post (3) is fitted with a cable with an annular connector. A fastening nut (7) for locking the position of the cable with an annular connector is threaded onto the connecting post (3). A protective component is detachably provided on the insulating substrate (1). The connecting post (3) and the fastening nut (7) are both conductive substrates (12) of high-purity oxygen-free copper. The surface of the conductive substrate (12) is electroplated with a high conductivity layer (13), and the surface of the high conductivity layer (13) is coated with a wear-resistant protective layer (14) by vapor deposition.

2. The low-resistance lithium battery connection terminal according to claim 1, characterized in that, The connecting post (3) is threadedly connected to the internal threaded hole (2) in the center of the insulating substrate (1) through the external thread (4) on the outer wall.

3. A low-resistance lithium battery connection terminal according to claim 1, characterized in that, The insulating substrate (1) has reserved holes (5) at each of its four corners for installation and fixing by bolts.

4. A low-resistance lithium battery connection terminal according to claim 1, characterized in that, The protective assembly includes an insulating protective cover (8) covering the connecting post (3), the insulating protective cover (8) having a through hole (9) in the center for the end of the connecting post (3) to pass through, and a notch (10) at the edge of the insulating protective cover (8) for a cable with a ring connector to pass through. The end of the connecting post (3) passes through the through hole (9) and is threaded with a matching insulating cap (11).

5. A low-resistance lithium battery connection terminal according to claim 1, characterized in that, The highly conductive layer (13) is made of silver.

6. A low-resistance lithium battery connection terminal according to claim 1, characterized in that, The wear-resistant protective layer (14) is a diamond-like coating film.

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