NACS socket with temperature control switch

Abstract

The utility model discloses a NACS socket with temperature control switch, a NACS socket with temperature control switch includes the main body, the main body is clamped with PCBA circuit board, and the relative position of main body and PCBA circuit board is invariable when clamping state, a plurality of end cover holes of axis and end cover surface perpendicular are seted up on PCBA circuit board, be equipped with the heat conductor in the main body, and the heat conductor includes annular heat conduction ring with PCBA circuit board hole axis parallel, and heat conduction column, and one end of heat conduction column is fixedly connected with heat conduction ring and each heat conduction column is set up in the position of corresponding PCBA circuit board hole, be equipped with resistor and NTC thermistor on PCBA circuit board, and thermistor is set up on the side close to PCBA circuit board hole, and the one end of heat conduction column away from heat conduction ring is equipped with heat conduction grease.

Description

Technical Field

[0001] This utility model belongs to the field of socket technology, and more specifically, relates to a NACS socket with a temperature control switch. Background Technology

[0002] With the rapid development of the global new energy vehicle industry, the protection performance of electric vehicle charging interfaces has become a core indicator for ensuring charging safety and product reliability. In outdoor applications, charging interfaces must withstand complex environments such as rain, dust, and salt spray corrosion. Therefore, the IP (Ingress Protection) protection rating standards established by the International Electrotechnical Commission (IEC) have become the core basis for industry technical specifications. Among them, the IP67 rating requires complete protection against dust ingress (IP6X) and the ability to withstand brief immersion in 1 meter of water for 30 minutes without performance failure (IPX7). This standard has become a mandatory requirement for mainstream new energy vehicle charging interfaces. In existing technologies, Tesla's North American Charging Standard (NACS) interface achieves integrated AC / DC charging through innovative design, with a maximum voltage of 1000V DC and a current carrying capacity of 350A DC non-liquid-cooled charging, significantly improving charging efficiency. Regarding the sealing structure, the NACS interface employs a two-part shell design, using ultrasonic welding to achieve conductor connections, and forming protection through terminal plastic coating, internal adhesive filling, and a combination of multiple sealing rings. For example, the power terminals are partially plastic-coated and fitted with sealing rings, with the temperature sensor integrated into the through-hole of the plastic coating, secured with screws for foolproof design; the shielding layer is combined with the sealing rings through a pressing process, ensuring both electromagnetic shielding and waterproof performance meet standards. Furthermore, a sealing ring is placed at the joint between the upper and lower covers of the socket, and the sealing space is filled using an injection molding process, forming a multi-level barrier.

[0003] However, existing technologies still have the following limitations: First, the sealing method relies on the injection process, which requires high manufacturing precision and may lead to problems such as adhesive slippage or sealing ring aging after long-term use; Second, salt spray corrosion tests show that some products exhibit metal corrosion after 96 hours in a salt spray environment, indicating that traditional surface treatment processes (such as ordinary metal coatings) are not suitable for coastal or high-humidity areas; Third, the assembly process is highly complex, involving multiple steps such as ultrasonic welding, screw tightening, and sealing ring positioning, which may affect production efficiency and cost control.

[0004] To address the above problems, this invention proposes a NACS socket with an IP67 protection rating. Utility Model Content

[0005] One objective of this invention is to achieve a more reliable internal cavity seal by optimizing the sealing structure and process.

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a NACS socket with a temperature control switch.

[0007] To achieve the aforementioned objectives, the present invention comprises: a main body with an end cap snapped onto it, wherein the relative positions of the main body and the end cap remain unchanged when snapped; the end cap having multiple end cap holes with axes perpendicular to the end cap surface; a heat conductor within the main body, comprising an annular heat-conducting ring parallel to the axis of the end cap holes, and heat-conducting pillars, one end of which is fixedly connected to the heat-conducting ring, and each heat-conducting pillar being positioned corresponding to the end cap hole; a resistor and an NTC thermistor on the end cap, the thermistor being positioned near the end cap hole, and thermal grease being applied to the end of the heat-conducting pillar away from the heat-conducting ring. Optionally, multiple heat-conducting pillars are arrayed and fixed along the circumferential surface of the heat-conducting ring.

[0008] Optionally, the snap-fit ​​structure between the end cap and the main body is a snap-fit ​​and slot-fit structure.

[0009] Optionally, the heat-conducting ring and the heat-conducting pillar are integrally formed.

[0010] Optionally, the thermal grease is a silicone thermal grease.

[0011] Alternatively, the NTC thermistor can be fixed to the end cap by soldering. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of an NACS socket with a temperature control switch according to the present invention. Figure 2 This is a partial schematic diagram of a NACS socket with a temperature control switch that protrudes from the heat conductor in this utility model. Figure 3 This is a partial schematic diagram of the protruding end cap of a NACS socket with a temperature control switch according to this utility model. Figure label: 11. Main body; 12. PCBA circuit board; 13. End cap hole; 21. Thermal conductor; 22. Annular thermal ring; 23. Thermal pillar; 24. Resistor; 25. NTC thermistor; 26. Thermal grease; In the accompanying drawings, the same parts are labeled with the same reference numerals; the drawings are not drawn to scale. Detailed Implementation

[0014] In view of the shortcomings of the prior art, the inventors of this case, through long-term research and extensive practice, have proposed the technical solution of this utility model. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples.

[0015] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made within the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0017] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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 application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0018] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0019] This utility model embodiment is intended to introduce and explain the structural composition of a NACS socket with a temperature control switch and the cooperation relationship between the various components. Unless otherwise specified, the dimensions, materials, and manufacturing processes of the various components in the NACS socket with a temperature control switch in this utility model embodiment can be selected according to specific circumstances, and no special limitations or explanations are made here.

[0020] Furthermore, to provide the public with a better understanding of this utility model, certain specific details are described in detail in the following description. However, those skilled in the art can fully understand this utility model even without these detailed descriptions.

[0021] Example 1 like Figures 1 to 3 A NACS socket with a temperature control switch includes a main body 11, on which a PCBA circuit board 12 is disposed. The PCBA circuit board 12 is snapped into the main body 11. When snapped into place, the relative position of the main body 11 and the PCBA circuit board 12 does not change. The PCBA circuit board 12 has multiple holes, and the axial direction of the holes in the PCBA circuit board 12 is perpendicular to the surface of the PCBA circuit board 12.

[0022] like Figures 1 to 3 The main body 11 is provided with a heat conductor 21, which includes an annular heat-conducting ring 22 and heat-conducting pillars 23. The axial direction of the heat-conducting ring is parallel to the axis of the PCBA circuit board 12 hole. Multiple heat-conducting pillars 23 are fixedly arrayed along the circumferential surface of the heat-conducting ring. One end of the heat-conducting pillar 23 is fixedly connected to the heat-conducting ring. Each heat-conducting pillar 23 is set at the position corresponding to the PCBA circuit board 12 hole.

[0023] like Figures 1 to 3 A resistor 24 and an NTC thermistor 25 are provided on the PCBA circuit board 12. The thermistor is located on the side close to the hole of the PCBA circuit board 12. Thermal grease 26 is provided on the end of the heat-conducting pillar 23 away from the heat-conducting ring.

[0024] During use, when the vehicle is connected to the charging pile, the resistance value of resistor 24 on PCBA circuit board 12 will be fed back to the charging monitoring system on the vehicle through the signal connector on the socket. (When the rated power of resistor 24 is reduced at ambient temperatures above 70℃, the resistance value will decrease.) After the vehicle recognizes this, it will take corresponding safety measures, such as reducing the rated power or stopping charging.

[0025] The advantages of this utility model: 1. Precise Temperature Monitoring: When the vehicle and charging pile are connected via the NACS socket, the NTC thermistor 25 on the PCBA circuit board 12 can detect temperature changes near the holes of the PCBA circuit board 12 in real time. Since the thermistor is positioned near the holes of the PCBA circuit board 12, which are crucial for current transmission during charging, the heat generated here can be quickly captured by the thermistor, thus achieving precise monitoring of the local temperature of the charging interface. Simultaneously, in the heat conductor 21 within the main body 11, the axis of the heat-conducting ring is parallel to the axis of the PCBA circuit board 12 holes, and the heat-conducting pillars 23 are arrayed and fixed along the circumferential surface of the heat-conducting ring and positioned corresponding to the positions of the PCBA circuit board 12 holes. This structure allows the heat conductor 21 to quickly and evenly conduct the heat generated near the PCBA circuit board 12 holes to the thermistor, further improving the accuracy and timeliness of temperature monitoring.

[0026] 2. Real-time Signal Feedback: During charging, the resistance of resistor 24 on the PCBA changes with ambient temperature. When the ambient temperature is above 70℃, the rated power of resistor 24 is reduced, and its resistance decreases. This information about the resistance changes of resistor 24 is fed back to the vehicle's charging monitoring system in real time through the signal connector on the NACS socket. The vehicle's charging monitoring system can continuously and stably receive these signals, thereby promptly understanding the temperature status of the charging interface. This real-time signal feedback mechanism ensures that the vehicle can grasp the temperature changes of the charging interface in a timely manner, providing a reliable basis for taking corresponding safety measures.

[0027] 3. Intelligent Safety Control: After receiving the feedback signal from resistor 24, the vehicle-side charging monitoring system analyzes and processes these signals. When it detects that the ambient temperature exceeds 70℃ and the resistance of resistor 24 decreases, indicating that the charging interface may be in a high-temperature dangerous state, the vehicle will immediately take corresponding safety measures. Depending on the actual situation, the vehicle can choose to reduce the charging power to keep the charging process within a safe temperature range; or it can directly stop charging to avoid safety accidents such as damage to the charging equipment or fire caused by high temperatures. This intelligent safety control mechanism can flexibly adjust the charging strategy according to different temperature conditions, effectively ensuring the safety of the charging process.

[0028] 4. Stable and Reliable Structure: The PCBA circuit board 12 is connected to the main body 11 via a snap-fit ​​connection. When snapped in this state, the relative positions of the main body 11 and the PCBA circuit board 12 remain unchanged. This snap-fit ​​structure is simple in design and provides a strong connection, capable of withstanding certain external forces during charging, such as vibrations from vehicle operation and the insertion and removal forces of the charging gun, ensuring the structural stability of the charging interface. Furthermore, the axial direction of the holes in the PCBA circuit board 12 is perpendicular to the surface of the PCBA circuit board 12. This design allows the charging gun to be inserted and removed smoothly and stably, reducing interface damage and abnormal temperature increases caused by improper insertion and removal, further improving the reliability and lifespan of the charging interface.

[0029] 5. Compatible with Multiple Scenarios: The NACS socket is designed to meet the needs of various charging scenarios. Whether in conventional charging environments or harsh conditions such as high temperatures and high altitudes, it can operate normally and perform its temperature monitoring and safety control functions. In high-temperature environments, changes in the resistance of the 24Ω resistor are promptly fed back to the vehicle, enabling it to take appropriate safety measures. In high-altitude areas with thin air and poor heat dissipation, the socket's precise temperature monitoring and intelligent safety control mechanism effectively prevent overheating caused by poor heat dissipation, ensuring safe charging. Furthermore, the socket is compatible with different types of vehicles and charging stations, offering excellent compatibility and meeting the increasingly diverse needs of new energy vehicle charging infrastructure.

[0030] It should be understood that the above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. It should not be considered that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A NACS socket with a temperature control switch, characterized in that: The device includes a main body (11), on which a PCBA circuit board (12) is snapped. When snapped, the relative positions of the main body (11) and the PCBA circuit board (12) remain unchanged. The PCBA circuit board (12) has multiple holes with axes perpendicular to the surface of the PCBA circuit board (12). The main body (11) contains a heat conductor (21), which includes an annular heat-conducting ring (22) parallel to the axis of the holes in the PCBA circuit board (12) and heat-conducting pillars (23). One end of the heat-conducting pillar (23) is fixed to the heat-conducting ring, and each heat-conducting pillar (23) is set at the position corresponding to the hole of the PCBA circuit board (12). The PCBA circuit board (12) is provided with a resistor (24) and an NTC thermistor. The thermistor is located on the side close to the hole of the PCBA circuit board (12), and the end of the heat-conducting pillar (23) away from the heat-conducting ring is provided with thermal grease (26).

2. A NACS socket with a temperature control switch according to claim 1, characterized in that: Multiple heat-conducting pillars (23) are arrayed and fixed along the circumferential surface of the heat-conducting ring.

3. A NACS socket with a temperature control switch according to claim 1, characterized in that: The connection structure between the PCBA circuit board (12) and the main body (11) is a snap-fit ​​and slot-fit structure.

4. A NACS socket with a temperature control switch according to claim 1, characterized in that: The heat-conducting ring and the heat-conducting pillar (23) are integrally formed.

5. A NACS socket with a temperature control switch according to claim 1, characterized in that: The thermal grease (26) is an organosilicon thermal grease (26).

6. A NACS socket with a temperature control switch according to claim 1, characterized in that: The NTC thermistor is fixed to the PCBA circuit board (12) by soldering.

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