DC stamping terminal of DC charging socket of new energy automobile

Abstract

The utility model relates to a new energy automobile direct current charging socket DC stamping terminal, which comprises a terminal base body and a reed, one end of the terminal base body is provided with a groove, the reed is in a curled and twisted shape, the reed is detachably arranged in the groove, the other end of the terminal base body is also provided with a welding flat position, and the welding flat position is provided with a welding groove. The welding flat position is used for performing ultrasonic welding with a cable; the spring piece comprises two connecting ends which are oppositely arranged, a notch is formed in each connecting end, a plurality of strip-shaped spring piece bodies are arranged between the two connecting ends, and the middles of the spring piece bodies are bent inwards. According to the terminal assembly, the reed can be replaced more conveniently through the detachable design of the reed, the replacement requirement of the whole terminal assembly caused by the damage of the reed is reduced, the maintenance cost is reduced, and meanwhile, the maintainability and sustainability of the product are also improved through the design.

Description

Technical Field

[0001] This application relates to the technical field of DC charging sockets for new energy vehicles, and particularly to a DC stamping terminal for a DC charging socket of a new energy vehicle. Background Art

[0002] With the rapid development of the new energy vehicle industry, DC charging technology, as one of the key technologies for achieving fast charging, the performance and cost issues of its charging sockets and internal terminals have attracted increasing attention.

[0003] Currently, the DC+ / DC- high-power charging terminals in the DC charging sockets for new energy vehicles widely used in the market mainly adopt the structural design of a reed and a steel cap. Their manufacturing process is complex and the cost is high. The terminal base of traditional terminals mostly uses bar stock or cold heading base blanks as raw materials. The feeding weight of bar stock is large, which not only increases the material cost. In addition, the reed part of the traditional terminal structure usually requires a complex twisting process, further increasing the manufacturing cost and difficulty.

[0004] During long-term use, as a key component, the elasticity, electrical conductivity, etc. of the reed may decline due to wear, aging or accidental damage, thus affecting the charging efficiency and safety. However, since the reed and the steel cap are usually fixed by welding, riveting or other irreversible fixing methods, once the reed has problems, the entire terminal assembly often needs to be replaced, which not only increases the maintenance cost but also may cause waste of resources.

[0005] In view of the above problems, a DC stamping terminal for a DC charging socket of a new energy vehicle is now designed. Summary of the Utility Model

[0006] The embodiments of this application provide a DC stamping terminal for a DC charging socket of a new energy vehicle to solve the problem in the related art that the DC+ / DC- charging terminals in the existing DC charging sockets for new energy vehicles mainly adopt the structural design of a reed and a steel cap, which is not conducive to the replacement of the reed.

[0007] In a first aspect, a DC stamping terminal for a DC charging socket of a new energy vehicle is provided, including:

[0008] A terminal base and a reed. One end of the terminal base is provided with a groove, the reed is in a coiled and twisted shape, the reed is detachably arranged inside the groove, and the other end of the terminal base is further provided with a welding flat position for ultrasonic welding with a cable;

[0009] The reed includes two connection ends arranged oppositely. The connection ends are in a circular ring shape, and there is a notch on the connection ends. A plurality of spring sheet bodies are arranged between the two connection ends. The spring sheet bodies are in a strip shape, and the middle of the spring sheet body is bent inward.

[0010] In some embodiments, the groove includes a groove front end face, a groove middle end face, and a groove rear end face arranged in sequence. The inner diameters of the groove front end face and the groove rear end face are smaller than the inner diameter of the groove middle end face.

[0011] The two connection ends are respectively in contact with the side walls of the groove front end face and the groove rear end face. The spring piece body is arranged inside the groove middle end face. The groove front end face and the groove rear end face are used to limit the reed.

[0012] In some embodiments, the terminal base is formed by rolling a sheet. Two dovetail grooves are oppositely provided at one end of the terminal base. Two dovetail buttons adapted to the dovetail grooves are oppositely provided at the other end of the terminal base. The dovetail buttons and the dovetail grooves are in snap fit.

[0013] In some embodiments, a sealing ring is provided on the terminal base. Two waterproof ribs are oppositely provided on the sealing ring. The waterproof ribs are located outside the sealing ring. The waterproof ribs are in interference fit with the external socket housing to form a seal for the socket housing.

[0014] In some embodiments, a drain hole is provided on the terminal base. The drain hole is communicated with the groove rear end face. The drain hole is used to drain the accumulated water inside the terminal base.

[0015] In some embodiments, two fixing wings are oppositely provided at one end of the terminal base connected to the welding flat position. The bottom of the fixing wing is connected to the welding flat position. The fixing wing is used to fix the terminal base.

[0016] The embodiment of the present application provides a DC stamping terminal for a new energy vehicle DC charging socket. The detachable design of the reed makes the replacement of the reed more convenient, reduces the need for replacing the entire terminal assembly due to reed damage, reduces the maintenance cost. At the same time, this design also improves the maintainability and sustainability of the product.

[0017] By adopting a design of curling and twisting the reed and bending a spring piece body inward in the middle, this structure can produce good elastic deformation when subjected to external force, ensuring stable contact with the male terminal, thereby improving the electrical conductivity.

[0018] Compared with the traditional reed structure machined terminal, the stamping terminal removes the steel cap design, making the overall structure simpler. This not only reduces the weight of the terminal, but also simplifies the production process and reduces the production cost.

[0019] Through automated production processes such as stamping and injection molding, the manufacturing cost of the terminal is greatly reduced, and the production efficiency is improved.

[0020] The ultrasonic welding between the terminal and the cable can be realized through the welding flat position, reducing the resistance at the connection. This helps to reduce the heat generated when the current passes through the connection during charging, thereby reducing the temperature rise of the terminal. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 Three-dimensional structure schematic provided by the embodiment of the present application Figure 1 ;

[0023] Figure 2 Three-dimensional structure schematic provided by the embodiment of the present application Figure 2 ;

[0024] Figure 3 Three-dimensional structure schematic provided by the embodiment of the present application Figure 3 ;

[0025] Figure 4 Bottom view provided by the embodiment of the present application;

[0026] Figure 5 Provided by the embodiment of the present application Figure 4 Cross-sectional view at D-D in

[0027] Figure 6 Three-dimensional structure schematic diagram of the reed provided by the embodiment of the present application.

[0028] In the figure: 1. Terminal base; 2. Reed; 21. Connection end; 22. Spring piece body; 3. Groove; 31. Front end face of the groove; 32. Middle end face of the groove; 33. Rear end face of the groove; 4. Welding flat position; 5. Drain hole; 6. Fixed wing; 7. Sealing ring; 8. Waterproof rib; 11. Dovetail buckle. Detailed Embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0030] An embodiment of the present application provides a DC stamping terminal for a DC charging socket of a new energy vehicle, which can solve the problem in the related art that the existing DC+ / DC- charging terminals in the DC charging socket of a new energy vehicle mainly adopt a structure design of a reed and a steel cap, which is not conducive to the replacement of the reed.

[0031] Please refer to Figures 1 - 3 , a DC stamping terminal for a DC charging socket of a new energy vehicle includes; a terminal base body 1 and a reed 2. One end of the terminal base body 1 is provided with a groove 3. The reed 2 is in a coiled and twisted shape. The reed 2 is detachably arranged inside the groove 3. The other end of the terminal base body 1 is further provided with a welding flat position 4, and the welding flat position 4 is used for ultrasonic welding with a cable; the reed 2 includes two connection ends 21 arranged oppositely. The connection ends 21 are in a circular ring shape, and there is a notch on the connection ends 21. A plurality of spring pieces 22 are arranged between the two connection ends 21. The spring pieces 22 are in a strip shape, and the middle part of the spring pieces 22 is bent inward.

[0032] In actual production, first, the terminal base body 1 and the welding flat position 4 and the fixing wing 6 thereon are integrally formed by a stamping device. Subsequently, the stamped terminal base body is installed on a machining device to machine the groove 3. This step ensures the precise dimensions and shape of the terminal base body and provides a basis for subsequent assembly. After the machining is completed, the terminal base body is subjected to electroplating treatment. Electroplating can not only improve the corrosion resistance and conductivity of the terminal base body, but also enhance its surface aesthetics and extend its service life.

[0033] Finally, after the notch position of the reed 2 is pressed, the outer diameter of the reed 2 will become smaller and smaller than the diameter of the groove 3 on the terminal base body 1, so that the reed 2 can be inserted into the groove 3. After the reed 2 is inserted into the groove 3, the pressed position will rebound. When the reed 2 needs to be replaced, only need to use a tool to forcibly deform the reed 2 in the axial direction of the terminal base body 1 until it can be clamped out. After taking out the old reed, insert a new reed to realize the replacement of the reed.

[0034] Specifically, the reed 2 is formed by stamping a strip. Traditional reeds may require multiple processes, including cutting, twisting, etc., while the reed in this design is formed by one-time stamping without additional twisting processes, thus simplifying the production process, improving production efficiency, and reducing manufacturing costs.

[0035] The reed 2 is composed of several strip-shaped spring pieces 22 and two circular connecting ends 21, and these parts are integrally formed in one piece during the stamping process. The spring pieces 22 form a certain angle with the connecting ends 21 during blanking, and then through the process of curling, the entire reed presents a shape like “)(”. This design enables the reed to produce good elastic deformation when subjected to external forces, while maintaining the stability and consistency of the structure.

[0036] In actual operation, when the DC charging socket of a new energy vehicle is plugged into the male terminal, the “)(” arc-shaped strip structure of the reed 2 will be expanded outward under the action of external forces. During this process, the reed generates a positive pressure on the groove 3 and also generates a positive pressure on the male terminal. The action of this double positive pressure ensures the tight fit between the reed and the groove, prevents the reed from coming out during the plugging and unplugging process, and at the same time ensures a stable electrical connection between the reed and the male terminal.

[0037] In addition, the elastic deformation of the reed 2 also has a certain buffering effect, which can absorb the impact force and vibration generated during the plugging and unplugging process, thereby protecting the contact surfaces of the socket and the male terminal and extending the service life.

[0038] The detachable design of the reed 2 makes the replacement of the reed more convenient, reduces the need to replace the entire terminal assembly due to reed damage, reduces the maintenance cost. At the same time, this design also improves the repairability and sustainability of the product.

[0039] By adopting a curled and twisted design for the reed 2 and bending the spring pieces 22 inward in the middle, this structure can produce good elastic deformation when subjected to external forces, ensuring stable contact with the male terminal, thereby improving the electrical conductivity.

[0040] Compared with the machined terminal of the traditional reed structure, the stamping terminal removes the steel cap design, making the overall structure more concise. This not only reduces the weight of the terminal, but also simplifies the production process and reduces the production cost.

[0041] Through automated production processes such as stamping and injection molding, the manufacturing cost of the terminal is greatly reduced, and the production efficiency is improved.

[0042] By welding the flat position 4, ultrasonic welding between the terminal and the cable can be achieved, reducing the resistance at the connection. This helps to reduce the heat generated when the current passes through the connection during charging, thereby reducing the temperature rise of the terminal.

[0043] Through the groove 3, the force received by the reed can be evenly distributed, reducing the phenomenon of stress concentration. This helps to extend the service life of the reed and improve the reliability of the entire terminal.

[0044] The groove 3 in this embodiment includes a groove front end face 31, a groove middle end face 32, and a groove rear end face 33 arranged in sequence. The inner diameters of the groove front end face 31 and the groove rear end face 33 are smaller than the inner diameter of the groove middle end face 32; the two connection ends 21 are respectively in contact with the side walls of the groove front end face 31 and the groove rear end face 33, and the spring piece body 22 is arranged inside the groove middle end face 32. The groove front end face 31 and the groove rear end face 33 are used to limit the reed 2.

[0045] First, when the reed 2 is in the pressed state, its outer diameter will become smaller, and at this time, it can be easily inserted into the groove 3. The groove 3 is composed of a groove front end face 31, a groove middle end face 32, and a groove rear end face 33 in sequence, and the inner diameters of the groove front end face 31 and the groove rear end face 33 are smaller than the inner diameter of the groove middle end face 32. The two connection ends 21 of the reed are respectively aligned with and in contact with the side walls of the groove front end face 31 and the groove rear end face 33, and the spring piece body 22 of the reed is arranged inside the groove middle end face 32.

[0046] When the reed 2 is completely inserted into the groove 3, its pressed part will rebound, causing the reed to return to its original outer diameter. At this time, one connection end 21 on one side of the reed is in close contact with the groove front end face 31, and the connection end 21 on the other side is also in close contact with the groove rear end face 33. Since the inner diameters of the groove front end face 31 and the groove rear end face 33 are 0.1 mm smaller than the inner diameter of the groove middle end face 32, this design ensures that the reed can be firmly fixed in the groove after rebounding and is not easily disengaged.

[0047] When the male terminal is inserted into the reed, the arc-shaped strip structure of the reed will be forced to expand outwards, generating a positive pressure on the groove and at the same time generating a positive pressure on the male terminal. This double positive pressure ensures the tight fit between the reed and the groove, as well as the stable electrical connection between the reed and the male terminal.

[0048] The reed 2 is limited by a full circle inside the groove 3 of the terminal base 1. Compared with the bump structure in the stamping terminal that usually provides limitation only at local positions, its fixing method is more reliable and stable. This helps to ensure that the reed will not shift or fall off during the insertion and extraction process.

[0049] The terminal base 1 in this embodiment is formed by rolling a sheet of material into a circle. Two dovetail grooves are oppositely provided at one end of the terminal base 1, and two dovetail buttons 11 adapted to the dovetail grooves are oppositely arranged at the other end of the terminal base 1. The dovetail buttons 11 are in snap-fit with the dovetail grooves.

[0050] The terminal base 1 is formed by blanking the sheet material and then rolling it into a circle. This process not only simplifies the production process but also improves the production efficiency. The design of the dovetail groove and the dovetail button is a typical snap-fit method, which has the advantages of a compact structure and a firm connection.

[0051] After the sheet metal is formed into a circle, due to the internal stress of the material and the action of external factors, the sheet metal sometimes explodes. The snap-fit between the dovetail button 11 and the dovetail groove can effectively prevent this situation. When the dovetail button is inserted into the dovetail groove, they will lock with each other to form a stable structure, thereby enhancing the overall strength and stability of the terminal base.

[0052] In one embodiment, a sealing ring 7 is provided on the terminal base 1. Two waterproof ribs 8 are oppositely arranged on the sealing ring 7. The waterproof ribs 8 are located outside the sealing ring 7. The waterproof ribs 8 are in interference fit with the external socket housing to form a seal for the socket housing.

[0053] The sealing ring 7 is injection-molded with liquid silicone rubber. Liquid silicone rubber has good high and low temperature resistance, aging resistance and elasticity, and is an ideal material for manufacturing waterproof seals.

[0054] The main function of the waterproof rib 8 is to form an interference fit with the socket housing. When the sealing ring 7 is installed on the socket housing, the waterproof rib 8 will be deformed by extrusion, so as to closely fit with the inner wall of the socket housing to form a reliable waterproof barrier.

[0055] Two semi-circular disk-shaped receiving grooves are oppositely formed on the terminal base 1. These two receiving grooves do not directly participate in the sealing process, but are used to provide a die-wrapping area during the injection molding process of the sealing ring. Specifically, the die will block these two receiving grooves, so that the liquid silicone rubber is injection-molded to wrap the cavity area between the receiving grooves and the outside of the terminal base. In this way, when the liquid silicone rubber cures, a complete sealing ring that is tightly combined with the terminal base will be formed.

[0056] In one embodiment, a drain hole 5 is formed on the terminal base 1. The drain hole 5 is communicated with the rear end face 33 of the groove. The drain hole 5 is used to drain the accumulated water in the terminal base 1.

[0057] In the design of the DC charging socket for new energy vehicles, considering the problem of water vapor or rainwater intrusion that may be encountered in the actual use environment, a drain hole 5 is specifically formed on the terminal base 1. The drain hole 5 is formed on the terminal base 1 and is communicated with the rear end face 33 of the groove. Such a layout ensures that when there is accumulated water inside the terminal base, the accumulated water can smoothly drain through the drain hole, avoiding damage caused by accumulation inside.

[0058] In one embodiment, two fixing wings 6 are oppositely arranged at one end of the terminal base 1 connected to the welding flat position 4. The bottom of the fixing wing 6 is connected to the welding flat position 4. The fixing wing 6 is used to fix the terminal base 1.

[0059] The terminal base 1 is a key component in the DC charging socket of new energy vehicles. The welding flat part 4 is usually a flat metal part used to fix the terminal base to the socket housing or other structures. The fixing wings 6 are two protruding parts arranged at one end where the terminal base 1 is connected to the welding flat part 4. They extend from both sides of the terminal base 1 and are connected to the welding flat part 4 at the bottom.

[0060] The function of the fixing wings 6 is to prevent the terminal base 1 from moving backward after welding or installation. The welding flat part 4 is fixed to the socket housing or other structures, and the fixing wings 6 are closely connected to the welding flat part 4 to form a stable support structure. Even when subjected to external tensile force or impact force, the fixing wings 6 can effectively prevent the terminal base 1 from moving or falling off.

[0061] By closely combining the fixing wings 6 with the welding flat part 4, the fixing wings 6 ensure that the terminal base 1 and components such as the reed and contact points on it can be stably fixed in the socket, thus ensuring the reliability and safety of the electrical connection.

[0062] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0064] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A DC stamping terminal for a DC charging socket of a new energy vehicle, characterized in that, Comprising: A terminal base body (1) and a reed (2), one end of the terminal base body (1) is provided with a groove (3), the reed (2) is in a coiled and twisted shape, the reed (2) is detachably arranged inside the groove (3), and the other end of the terminal base body (1) is further provided with a welding flat position (4), and the welding flat position (4) is used for ultrasonic welding with a cable; The reed (2) includes two connection ends (21) arranged oppositely, the connection ends (21) are in a circular ring shape, and there is a notch on the connection ends (21), and a plurality of spring sheet bodies (22) are arranged between the two connection ends (21), the spring sheet bodies (22) are in a strip shape, and the middle part of the spring sheet bodies (22) is bent inward.

2. The DC stamping terminal of a new energy vehicle DC charging socket according to claim 1, characterized in that: The groove (3) includes a groove front end face (31), a groove middle end face (32) and a groove rear end face (33) arranged in sequence, and the inner diameters of the groove front end face (31) and the groove rear end face (33) are smaller than the inner diameter of the groove middle end face (32); The two connection ends (21) are respectively in contact with the side walls of the groove front end face (31) and the groove rear end face (33), the spring sheet bodies (22) are arranged inside the groove middle end face (32), and the groove front end face (31) and the groove rear end face (33) are used for limiting the reed (2).

3. The DC stamping terminal of a new energy vehicle DC charging socket according to claim 1, characterized in that: The terminal base body (1) is formed by coiling a plate, two dovetail grooves are oppositely arranged at one end of the terminal base body (1), and two dovetail buttons (11) adapted to the dovetail grooves are oppositely arranged at the other end of the terminal base body (1), and the dovetail buttons (11) are in snap-fit with the dovetail grooves.

4. The DC stamping terminal of a new energy vehicle DC charging socket according to claim 2, characterized in that: A sealing ring (7) is arranged on the terminal base body (1), two waterproof ribs (8) are oppositely arranged on the sealing ring (7), the waterproof ribs (8) are located outside the sealing ring (7), and the waterproof ribs (8) are in interference fit with the external socket housing to form a seal for the socket housing.

5. The DC stamping terminal of a new energy vehicle DC charging socket according to claim 2, characterized in that: A drain hole (5) is opened on the terminal base body (1), the drain hole (5) is communicated with the groove rear end face (33), and the drain hole (5) is used for discharging the accumulated water inside the terminal base body (1).

6. The DC stamping terminal of a new energy vehicle DC charging socket according to claim 1, characterized in that: Two fixing wings (6) are oppositely arranged at one end of the terminal base body (1) connected to the welding flat position (4), the bottom of the fixing wings (6) is connected to the welding flat position (4), and the fixing wings (6) are used for fixing the terminal base body (1).

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