Fast plug-in DC-DC power connector with integrated filter function

Abstract

The utility model discloses a kind of fast plug type DC-DC power supply connectors of integrated filtering function, including insulating shell, filter circuit module and conducting terminal, the conducting terminal is sleeved in insulating shell, middle part is sealingly connected with insulating shell, and one end of conducting terminal forms a ring-like connector part with insulating shell, another end is fixedly connected with filter circuit module and extends out of insulating shell, forms the import end connected with power supply DC output end, threaded hole for being connected with power supply DC output end thread is equipped on import end;The filter circuit module is embedded in one end of insulating shell close to import end, and is sealingly connected with insulating shell.

Description

Technical Field

[0001] This utility model relates to the field of automotive power electronics, specifically to a quick-connect DC-DC power connector with integrated filtering function. Background Technology

[0002] DC-DC power connectors are primarily used to connect DC-DC converters to other circuit components, ensuring the safety and reliability of power transmission. In new energy vehicle motor controllers, DC-DC power modules require connectors to transmit high-voltage power. During power transmission, to ensure the stability and purity of the power output and to remove or reduce unwanted noise, interference, and harmonic components, a filter circuit module needs to be connected to the power module. However, existing automotive power connectors and filter circuit modules are installed separately, resulting in complex wiring and a large space requirement.

[0003] Chinese Patent Publication No. 201966446 discloses a compact electronic component connector with filtering function, including a base plate, a front panel, a socket, a filtering circuit, and a communication line. The socket is fixed to one side of the base plate, and the front panel has a through hole that fits over the socket. The base plate and the front panel are fixed together with screws. The filtering circuit is fixed to the other side of the base plate, with one end of the filtering circuit electrically connected to the socket and the other end connected to the communication line. While this connector integrates the filtering circuit with the base plate and saves installation space, it still requires an external power supply, which is inconvenient. Furthermore, the filtering circuit is mounted on the outside of the base plate without any protection, making it susceptible to instability due to vibration.

[0004] Chinese patent application number 2016101022651 discloses a connector for a motor controller in a new energy vehicle, including a terminal block, a cable, a plastic body, a waterproof sealing ring, a metal mounting shell, a rubber ring, and a shielding ring. One end of the terminal block is connected to the cable. The plastic body has a terminal block receiving hole in the middle, and the other end of the terminal block passes through the receiving hole from bottom to top. The plastic body has a groove on the side near the terminal block and around its outer periphery. The plastic body has a locking pin on the side near the cable. The waterproof sealing ring is embedded in the groove. The metal mounting shell has a locking slot, and the metal mounting shell is fitted onto the plastic body. The locking slot and the locking pin are correspondingly fitted. The rubber ring is fitted onto the cable and near the terminal block. The shielding ring is fitted onto the cable and near the bottom of the plastic body. Although this connector facilitates power input, its structure is complex and it lacks filtering function. High-frequency switching noise can easily be transmitted to the controller through the interface, interfering with the circuit. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a quick-connect DC-DC power connector with integrated filtering function, so as to solve the problems of complex structure and poor power input stability of existing connectors.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A quick-connect DC-DC power connector with integrated filtering function includes an insulating shell, a filtering circuit module, and conductive terminals. The conductive terminals are housed within the insulating shell, with a sealed connection at the center. One end of the conductive terminal forms an annular insertion portion with the insulating shell, while the other end, fixedly connected to the filtering circuit module, extends out of the insulating shell to form an inlet end for connection to the DC output terminal of the power supply. The inlet end has a threaded hole for threaded connection to the DC output terminal. The filtering circuit module is embedded in the insulating shell near the inlet end and is sealed to the insulating shell. This design integrates the filtering circuit module within the insulating shell and connects it to the conductive terminals, creating a compact overall structure that saves installation space. In use, the copper busbar at the DC output terminal is threaded into the threaded hole at the inlet end of the conductive terminal, guiding the power supply to the conductive terminal. After filtering by the filtering circuit module, the power is then connected to the connector for conduction. Compared to wire connections, this installation and conductive method is more convenient. Integrating the filter circuit module within the connector's insulating housing effectively prevents electromagnetic interference from the external environment and other electronic devices from entering the power system, or prevents internal noise from propagating and affecting other devices. The annular connection formed by the conductive terminals and the insulating housing mates with the connector, allowing for easy and quick insertion and removal, and is compatible with the connector's shape, ensuring a stable connection.

[0008] Furthermore, the filter circuit module includes at least one common-mode inductor and two capacitors, which are welded and fixed to the conductive terminals and sealed to the insulating shell with thermally conductive adhesive. The common-mode inductor and capacitors are connected in series and then electrically connected to the conductive terminals. In this way, the filter circuit module is fixed and connected to the conductive terminals by welding, filtering the incoming current. The filter circuit module is modularly installed, has good integration performance, and is easy and secure to install.

[0009] Furthermore, the insulating shell is cylindrical, consisting of a plug-in cylindrical part, a conductive terminal fixing part, and a cylindrical embedding part. The plug-in cylindrical part and the cylindrical embedding part are located on both sides of the conductive terminal fixing part. Multiple heat sinks are circumferentially arranged on the outer end face of the cylindrical embedding part, and the heat sinks are arranged along the axial direction of the cylindrical embedding part. In this way, the insulating shell is integrally injection molded, and the resulting plug-in cylindrical body, together with the end of the conductive terminal, can form an annular insertion part that mates with the plug-in part, enabling quick insertion and removal. The conductive terminal fixing part in the middle mates with the conductive terminal, and the cylindrical embedding part mates with the filter circuit module. The heat sinks in this section dissipate the heat generated by the filter circuit module.

[0010] Furthermore, the conductive terminal has multiple protrusions spaced apart in the middle, with an annular groove formed between two adjacent protrusions. The conductive terminal and the insulating shell are injection molded and sealed to each of the annular grooves of the conductive terminal. In this way, the conductive terminal and the insulating shell are connected by injection molding and sealing, resulting in a stable connection structure. At the same time, the annular grooves can engage with the insulating shell, further improving the stability of the connection.

[0011] Furthermore, the conductive terminal is made of copper, and a silver plating layer is formed on its surface. Using copper to make the conductive terminal provides good electrical and thermal conductivity, and the silver plating layer on the end face further enhances conductivity and reduces resistance.

[0012] Furthermore, the insulating shell protrudes outward in the middle to form a mounting plate that is fixedly connected to the controller. A sealing ring is embedded on the side of the mounting plate near the filter circuit module, and multiple threaded blind holes for fixed connection with the controller are provided on the outer side of the sealing ring and on the mounting plate. In this way, the mounting plate provided on the insulating shell facilitates the installation of the controller. The controller is fixed to the mounting plate with bolts and sealed by the sealing ring, making installation and replacement relatively convenient.

[0013] Furthermore, a retaining plate is provided on the side of the mounting plate near the annular connector. The retaining plate is inclined and has a notch for engaging with the connector. Insertion portions are also provided on both sides of the retaining plate. Thus, the retaining plate corresponds to the insertion plate on the connector, and the notch on the retaining plate allows the protruding buckle of the insertion plate on the connector to engage, forming a latching connection. The insertion portions can be inserted into the connector for a secure and stable fit, preventing poor contact due to vibration. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the quick-connect DC-DC power connector in the embodiment;

[0015] Figure 2 This is a top view of the quick-connect DC-DC power connector in the embodiment;

[0016] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of AA. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1 , Figure 2As shown, the quick-connect DC-DC power connector with integrated filtering function provided in this embodiment includes an insulating shell 1, a filter circuit module 2, and conductive terminals 3. The conductive terminals 3 are fitted inside the insulating shell 1, with a sealed connection to the insulating shell 1 in the middle. One end of the conductive terminal 3 forms an annular insertion part 4 with the insulating shell 1, and the other end is fixedly connected to the filter circuit module 2 and extends out of the insulating shell 1, forming an inlet end that connects to the DC output terminal of the power supply. A threaded hole 32 for threaded connection with the DC output terminal of the power supply is provided on the inlet end. The filter circuit module 2 is embedded in the insulating shell 1 near the inlet end and is sealed to the insulating shell 1. In this way, by embedding the filter circuit module 2 inside the insulating shell 1 and connecting it to the conductive terminals 3, the filter circuit module 2 and the shell are integrated, resulting in a compact overall structure that saves installation space. In use, the copper busbar of the DC output terminal of the power supply is threadedly connected to the threaded hole 32 of the inlet end of the conductive terminals 3, allowing the DC current of the power supply to be introduced into the conductive terminals 3. After being filtered by the filter circuit module 2, the current is then connected to the connector to achieve conductivity. Compared to wire connection, this installation and conductive method is more convenient. Furthermore, integrating the filter circuit module 2 within the connector's insulating housing 1 effectively prevents electromagnetic interference from the external environment and other electronic devices from entering the power system, or prevents internal noise from propagating and affecting other devices. The annular connector 4 formed by the conductive terminal 3 and the insulating housing 1 can mate with the connector, allowing for convenient and quick insertion and removal, and it is compatible with the shape of the connector, ensuring a stable connection.

[0020] Furthermore, the filter circuit module 2 includes at least one common-mode inductor and two capacitors, which are welded and fixed to the conductive terminal 3 and sealed to the insulating shell 1 with thermally conductive adhesive; the common-mode inductor and capacitors are connected in series and then electrically connected to the conductive terminal 3. Figure 1 As shown, the filter circuit module 2 in this embodiment is cylindrical, with a through hole in the middle that mates with the conductive terminal 3. Thus, the filter circuit module 2 is fixed and connected to the conductive terminal 3 by welding, filtering the incoming current. The filter circuit module 2 features modular installation, good integration performance, and convenient and secure installation.

[0021] Furthermore, the insulating shell 1 is made of PA66+30%GF material and is cylindrical, consisting of a plug-in cylindrical part 11, a conductive terminal fixing part 12, and a cylindrical embedding part 13. The plug-in cylindrical part 11 and the cylindrical embedding part 13 are located on both sides of the conductive terminal fixing part 12. Multiple heat sinks 14 are provided circumferentially on the outer end face of the cylindrical embedding part 13, and the heat sinks 14 are arranged along the axial direction of the cylindrical embedding part 13. In this way, the insulating shell 1 is integrally injection molded, and the formed plug-in cylindrical body and the end of the conductive terminal 3 can form an annular connector 4 that mates with the plug-in part 19, enabling quick insertion and removal. The conductive terminal fixing part 12 in the middle can mate with the conductive terminal 3, and the cylindrical embedding part 13 can mate with the filter circuit module 2. The heat sinks 14 in this section can dissipate the heat generated by the filter circuit module 2.

[0022] Furthermore, the conductive terminal 3 has multiple protrusions spaced apart in the middle, and an annular groove 31 is formed between two adjacent protrusions. The conductive terminal 3 and the insulating shell 1 are injection molded and sealed to each of the annular grooves 31 of the conductive terminal 3. In this way, the conductive terminal 3 and the insulating shell 1 are connected by injection molding and sealing, resulting in a stable connection structure. At the same time, the annular grooves 31 can engage with the insulating shell 1, further improving the stability of the connection.

[0023] In this embodiment, the conductive terminal 3 is made of copper, and a silver plating layer is provided on the surface of the conductive terminal 3. In this way, the conductive terminal 3 is made of copper, which has good electrical and thermal conductivity. The silver plating layer on the end face can further improve the conductivity and reduce the resistance.

[0024] Furthermore, the insulating shell 1 protrudes outward from the middle to form a mounting plate 15 that is fixedly connected to the controller. A sealing ring 5 is embedded on the side of the mounting plate 15 near the filter circuit module 2. Multiple threaded blind holes 16 for fixed connection with the controller are provided on the outer side of the sealing ring 5 and on the mounting plate 15. In this way, the mounting plate 15 provided on the insulating shell 1 facilitates the installation of the controller. The controller is fixed to the mounting plate 15 with bolts and sealed by the sealing ring 5, making installation and replacement relatively convenient.

[0025] like Figure 3As shown, a retaining plate 17 is provided on the side of the mounting plate 15 near the annular connector 4. The retaining plate 17 is inclined and has a notch 18 for engaging with the connector. Connecting portions 19 are also provided on both sides of the retaining plate 17. In this embodiment, the retaining plate 17 can deform under external force, possessing a certain degree of elasticity. Thus, the retaining plate 17 corresponds to the connecting plate on the connector. The notch 18 on the retaining plate 17 allows the protrusion of the connecting plate on the connector to engage, thereby forming a fastening connection. The connecting portions 19 can be inserted into the connector for a secure fit, ensuring stable connection and preventing poor contact due to vibration.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A quick-connect DC-DC power connector with integrated filtering function, comprising an insulating shell and a filtering circuit module, characterized in that, It also includes conductive terminals, which are fitted inside an insulating shell and sealed to the insulating shell in the middle. One end of the conductive terminal forms an annular insertion part with the insulating shell, and the other end extends out of the insulating shell after being fixedly connected to the filter circuit module, forming an inlet end that connects to the DC output terminal of the power supply. The inlet end is provided with a threaded hole for threaded connection with the DC output terminal of the power supply. The filter circuit module is embedded in the end of the insulating shell near the inlet end and is sealed to the insulating shell.

2. The quick-connect DC-DC power connector with integrated filtering function according to claim 1, characterized in that, The filter circuit module includes at least one common-mode inductor and two capacitors, which are welded and fixed on the conductive terminals and sealed to the insulating shell with thermally conductive adhesive; the common-mode inductor and capacitors are connected in series and electrically connected to the conductive terminals.

3. The quick-connect DC-DC power connector with integrated filtering function according to claim 2, characterized in that, The insulating shell is cylindrical and consists of a plug-in cylindrical part, a conductive terminal fixing part, and a cylindrical embedding part. The plug-in cylindrical part and the cylindrical embedding part are located on both sides of the conductive terminal fixing part. Multiple heat sinks are provided circumferentially on the outer end face of the cylindrical embedding part, and the heat sinks are arranged along the axial direction of the cylindrical embedding part.

4. The quick-connect DC-DC power connector with integrated filtering function according to claim 1, 2, or 3, characterized in that, The conductive terminal has multiple protrusions spaced apart in the middle, and an annular groove is formed between two adjacent protrusions. The conductive terminal and the middle part of the insulating shell are injection molded and sealed to each annular groove of the conductive terminal.

5. The quick-connect DC-DC power connector with integrated filtering function according to claim 4, characterized in that, The conductive terminal is made of copper and has a silver plating layer on its surface.

6. The quick-connect DC-DC power connector with integrated filtering function according to claim 1, 2, or 5, characterized in that, The insulating shell protrudes outward in the middle to form a mounting plate that is fixedly connected to the controller. A sealing ring is embedded on the side of the mounting plate near the filter circuit module. Multiple threaded blind holes for fixed connection with the controller are provided on the outside of the sealing ring and on the mounting plate.

7. The quick-connect DC-DC power connector with integrated filtering function according to claim 6, characterized in that, A retaining plate is provided on one side of the mounting plate near the annular connector. The retaining plate is inclined and has a slot for engaging with the plug. Plug-in portions are also provided on both sides of the retaining plate.

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