New energy fast charging gun with overload protection

Abstract

The utility model discloses a new energy quick charging gun with overload protection belongs to new energy automobile charging equipment technical field, and it is to solve the existing new energy quick charging gun's overload protection related module maintenance difficulty, the sealing performance is insufficient, the component assembly precision is low, the core component life is influenced's technical problem. The charging gun includes the charging gun body, and the bottom of charging gun body is equipped with the sealed box, and the bottom of sealed box is equipped with the thread groove, and the top of thread groove is equipped with the installation box, and the top of installation box is equipped with the current detection module between the cable inside charging gun body, and the bottom of installation box is equipped with the installation groove, and the line joint is equipped between installation groove and current detection module, and the utility model discloses reduce maintenance difficulty through relying on the convenient dismounting design, and the current detection module is combined with quick protection response guarantee charging safety, is applicable to new energy automobile outdoor quick charging scene, has higher practicality and reliability.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle charging equipment technology, specifically a new energy fast charging gun with overload protection. Background Technology

[0002] As is well known, with the rapid development of the new energy vehicle industry, fast charging guns, as core equipment in the charging process of new energy vehicles, have gradually become a key focus of industry attention due to their safety, operational reliability, and ease of maintenance. However, current new energy fast charging guns on the market still have many technical defects that need to be addressed in practical applications, as follows: The core overload protection components of traditional fast charging guns, including the current detection module and controller, are mostly integrated into a deep cavity inside the gun body. These components are typically connected to the gun body by multiple sets of bolts and wire soldering. When the charging gun experiences frequent overload protection triggers or interrupted current detection signals, operators need to first disassemble the gun body and then disconnect multiple sets of wire connectors one by one to repair the faulty components. The entire process is very cumbersome, time-consuming, and prone to damaging other normal internal components during disassembly. In response to the shortcomings of the existing technologies, the industry urgently needs a new energy fast charging gun with a stable structural design, reliable sealing performance, convenient maintenance and operation, and accurate overload protection function to solve the problems of poor adaptability of existing charging guns in complex outdoor environments, high maintenance costs, and prominent charging safety hazards. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a new energy fast charging gun with overload protection.

[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a new energy fast charging gun with overload protection, comprising a charging gun body, a sealed box at the bottom of the charging gun body, a threaded groove at the bottom of the sealed box, a mounting box at the top of the threaded groove, a current detection module between the top of the mounting box and the internal cable of the charging gun body, a mounting groove at the bottom of the mounting box, a line connector between the mounting groove and the current detection module, a controller in the mounting groove, a positioning mechanism between the controller and the mounting groove, a line interface at the top of the controller, the line connector being inserted into the line interface, and a sealing mechanism on the threaded groove.

[0005] Furthermore, the sealing mechanism includes a sealing cover, which is threaded into the threaded groove. A locking component is provided between the sealing cover and the mounting box, and a rubber block is provided at the center of the top of the sealing cover.

[0006] Furthermore, the positioning mechanism includes a positioning hole and a positioning post. The positioning hole is formed at the top of the controller, and the positioning post is installed at the top of the mounting groove, extending into the positioning hole.

[0007] Furthermore, the rubber block is provided with a heat-conducting sheet, the bottom end of the sealing cover is provided with a groove, and a heat-conducting protrusion is provided between the heat-conducting sheet and the bottom end of the sealing cover, the heat-conducting protrusion extending into the groove.

[0008] Furthermore, both the heat-conducting sheet and the heat-conducting bump are made of aluminum alloy.

[0009] Furthermore, the threaded groove is provided with a sealing strip made of rubber resistant to high and low temperatures.

[0010] Furthermore, the inner wall of the mounting groove is provided with an elastic arc block, and an arc groove is opened on one side of the controller, with the elastic arc block abutting against the arc groove.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a new energy fast charging gun with overload protection, which has the following beneficial effects: This new energy fast charging gun with overload protection features a positioning hole on the top of the controller and a corresponding positioning post on the top of the mounting slot. During controller assembly, the positioning post guides the controller to be precisely embedded into the mounting slot, automatically aligning the line connectors with the line interfaces on the top of the controller. This eliminates the need for repeated manual alignment, significantly reducing component assembly time. Simultaneously, the cooperation between the positioning post and the positioning hole restricts the horizontal and vertical displacement of the controller within the mounting slot, preventing line connectors from detaching due to charging gun vibration and ensuring the stability of current signal transmission. When the charging gun malfunctions and needs repair, staff only need to unscrew the sealing cover to expose the mounting box, controller, and current detection module inside the sealed enclosure. There is no need to disassemble the entire gun body. The connection status of the line connectors and interfaces, as well as whether there is any damage to the appearance of the components, can be directly checked, which greatly shortens the repair time. After the repair is completed, the sealing cover can be tightened again to restore the charging gun to use. The whole process does not require the use of special tools, which reduces the skill requirements for repair personnel and further improves the convenience of maintenance. Attached Figure Description

[0012] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a schematic diagram of the third-view structure of this utility model; Figure 4 This utility model Figure 1 Enlarged front half-sectional view of the central sealing box.

[0013] In the diagram: 1. Charging gun body; 2. Sealed box; 3. Mounting box; 4. Current detection module; 5. Line connector; 6. Controller; 7. Sealing cover; 8. Locking assembly; 9. Rubber block; 10. Positioning post; 11. Heat-conducting plate; 12. Heat-conducting protrusion; 13. Sealing strip; 14. Elastic arc block. Detailed Implementation

[0014] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1 to 4This utility model relates to a fast charging gun for new energy vehicles with overload protection, comprising a charging gun body 1. A sealed box 2 is located at the bottom of the charging gun body 1. A threaded groove is formed at the bottom of the sealed box 2. A mounting box 3 is located at the top of the threaded groove. A current detection module 4 is located between the top of the mounting box 3 and the internal cables of the charging gun body 1. A mounting groove is formed at the bottom of the mounting box 3. A line connector 5 is located between the mounting groove and the current detection module 4. A controller 6 is located in the mounting groove. A positioning mechanism is provided between the controller 6 and the mounting groove. A line interface is located at the top of the controller 6, and the line connector 5 is inserted into the line interface. A sealing mechanism is provided on the threaded groove. In this embodiment, the mounting box 3 and the sealing box 2 are integrally formed with the charging gun body 1. The input end of the current detection module 4 is welded or crimped to the power supply cable inside the charging gun body 1, and the output end is welded to one end of the line connector 5. The other end of the line connector 5 is then extended into the mounting groove of the mounting box 3. The controller 6 is precisely embedded into the mounting groove through the positioning mechanism, so that the line interface at the top of the controller 6 is aligned with the line connector 5 extending into the mounting groove. The line connector 5 is inserted into the line interface to complete the electrical connection between the current detection module 4 and the controller 6. The sealing mechanism is assembled on the threaded groove of the sealing box 2 to achieve waterproof and dustproof protection for the internal components of the sealing box 2. When the charging gun is inserted into the charging interface of the new energy vehicle and charging is started, current flows through the internal cable of the charging gun body 1. The current detection module 4 at the top of the mounting box 3 collects the cable current signal in real time and transmits the current signal to the controller 6 through the connection of the line connector 5 and the line interface. The controller 6 presets an overload current threshold (such as 1.2 to 1.5 times the rated charging current) and continuously compares the detected current signal with the threshold: if the current is normal, the controller 6 does not operate and charging proceeds normally; if a short circuit or vehicle battery abnormality causes the current to exceed the threshold, the controller 6 immediately triggers overload protection (such as cutting off the charging circuit or sending a fault signal to the charging pile) and stops charging; the inside of the sealing box 2 is sealed by a sealing mechanism to prevent external moisture and dust from entering and affecting the circuit connection stability of the current detection module 4 and the controller 6, ensuring reliable detection and control functions. If the current detection module 4 uses an ACS712 Hall current sensor, when the charging gun malfunctions (such as frequent overload protection triggering or no detection signal), the sealing mechanism can be disassembled (such as unscrewing the sealing cover 7) to expose the mounting box 3 and controller 6 inside the sealing box 2. The connection status of the line connector 5 and the line interface, whether the controller 6 is damaged, and whether the current detection module 4 is abnormal can be directly checked. After repair, the sealing mechanism can be reassembled to restore its use.

[0016] In this solution, the sealing mechanism includes a sealing cover 7, which is threaded into the threaded groove. A locking assembly 8 is provided between the sealing cover 7 and the mounting box 3. A rubber block 9 is provided at the center of the top of the sealing cover 7. The outer side of the sealing cover 7 is provided with external threads, which engage with the internal threads of the threaded groove of the sealing box 2. Through the tightness of the threaded engagement, external moisture and dust are prevented from entering the interior of the sealing box 2 from the threaded groove. In the locking assembly 8 (such as a lock cylinder and a lock tongue), the lock cylinder is embedded inside the sealing cover 7, and the lock tongue is fixed to the bottom of the mounting box 3. When the sealing cover 7 is fully screwed into the threaded groove, the lock cylinder and the lock tongue are aligned. Inserting the matching key can lock the lock cylinder and the lock tongue together. The sealing cover 7 cannot be unscrewed without the key. The rubber block 9 (elastic material) at the top of the sealing cover 7 is screwed in as the sealing cover 7 is screwed in, gradually contacting and slightly compressing the bottom of the controller 6. Vibration is absorbed through elastic deformation to ensure the stability of the controller 6. In this solution, the positioning mechanism includes a positioning hole and a positioning post 10. The positioning hole is opened at the top of the controller 6, and the positioning post 10 is installed at the top of the mounting groove. The positioning post 10 extends into the positioning hole. When installing the controller 6, the positioning hole at the top of the controller 6 is aligned with the positioning post 10 at the top of the mounting groove, so that the positioning post 10 is inserted into the positioning hole. By using the gap fit between the post and the hole, such as the diameter of the positioning post 10 being slightly smaller than the positioning hole, the horizontal displacement of the controller 6 in the mounting groove is restricted.

[0017] In this design, the rubber block 9 is provided with a heat-conducting sheet 11, and the bottom end of the sealing cover 7 is provided with a groove. A heat-conducting protrusion 12 is provided between the heat-conducting sheet 11 and the bottom end of the sealing cover 7. The heat-conducting protrusion 12 extends into the groove. When the controller 6 is working, it generates heat, which is transferred to the rubber block 9 through the controller 6. After the heat-conducting sheet 11 (made of high thermal conductivity material) in the rubber block 9 absorbs the heat, it is transferred to the sealing cover 7 through the heat-conducting protrusion 12 (which is integral with or tightly attached to the heat-conducting sheet 11). The sealing cover 7 is exposed to the external environment, and the heat is dissipated through convection between the surface of the sealing cover 7 and the air. At the same time, the heat-conducting protrusion 12 extends into the groove of the sealing cover 7, increasing the thermal contact area and accelerating the transfer of heat from the heat-conducting sheet 11 to the sealing cover 7. In this solution, both the heat-conducting sheet 11 and the heat-conducting bump 12 are made of aluminum alloy. The thermal conductivity of aluminum alloy (approximately 200~230W / (m・K)) is much higher than that of rubber (approximately 0.2W / (m・K)) and plastic (approximately 0.3~0.5W / (m・K)). It can quickly absorb the heat transferred from the controller 6 to the rubber block 9 and efficiently conduct it to the sealing cover 7 through the heat-conducting bump 12.

[0018] In this design, the threaded groove is provided with a sealing strip 13 made of high and low temperature resistant rubber. The sealing strip 13 is embedded in the top edge of the threaded groove and the contact surface between the sealing cover 7 and the threaded groove. When the sealing cover 7 is screwed into the threaded groove, the sealing strip 13 is squeezed by the sealing cover 7, filling the tiny gap between the sealing cover 7 and the threaded groove, preventing moisture and dust from seeping in from the threaded mating gap. The high and low temperature resistant rubber (such as silicone rubber or fluororubber) can maintain elasticity in the range of ~40℃ to 120℃ and will not lose its sealing ability due to changes in ambient temperature. In this design, the inner wall of the mounting groove is provided with an elastic arc block 14, and an arc groove is provided on one side of the controller 6. The elastic arc block 14 abuts against the arc groove. The elastic arc block 14 (such as silicone or elastic plastic material) has deformation capability. When the controller 6 is embedded in the mounting groove, the elastic arc block 14 is squeezed by the controller 6 to generate elastic deformation. The reaction force generated by the deformation makes the elastic arc block 14 tightly abut against the arc groove of the controller 6, forming a clamping fixation. The arc-shaped structure of the arc groove fits with the arc-shaped surface of the elastic arc block 14, increasing the contact area, while restricting the vertical (up and down) movement of the controller 6 in the mounting groove. Combined with the horizontal limit of the positioning mechanism, the controller 6 is fixed in all directions.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new energy fast charging gun with overload protection, comprising a charging gun body (1), characterized in that, The bottom of the charging gun body (1) is provided with a sealing box (2), the bottom of the sealing box (2) is provided with a threaded groove, the top of the threaded groove is provided with a mounting box (3), the top of the mounting box (3) is provided with a current detection module (4) between the top of the mounting box (3) and the internal cable of the charging gun body (1), the bottom of the mounting box (3) is provided with a mounting groove, the mounting groove is provided with a line connector (5) between the mounting groove and the current detection module (4), the mounting groove is provided with a controller (6), the controller (6) is provided with a positioning mechanism between the controller (6) and the mounting groove, the top of the controller (6) is provided with a line interface, the line connector (5) is inserted into the line interface, and the threaded groove is provided with a sealing mechanism.

2. The new energy fast charging gun with overload protection according to claim 1, characterized in that, The sealing mechanism includes a sealing cover (7), which is threaded into the threaded groove. A locking component (8) is provided between the sealing cover (7) and the mounting box (3). A rubber block (9) is provided at the center of the top of the sealing cover (7).

3. The new energy fast charging gun with overload protection according to claim 1, characterized in that, The positioning mechanism includes a positioning hole and a positioning post (10). The positioning hole is opened at the top of the controller (6), and the positioning post (10) is installed at the top of the mounting groove and extends into the positioning hole.

4. The new energy fast charging gun with overload protection according to claim 2, characterized in that, The rubber block (9) is provided with a heat-conducting sheet (11), and the bottom end of the sealing cover (7) is provided with a groove. A heat-conducting protrusion (12) is provided between the heat-conducting sheet (11) and the bottom end of the sealing cover (7), and the heat-conducting protrusion (12) extends into the groove.

5. The new energy fast charging gun with overload protection according to claim 4, characterized in that, Both the heat-conducting sheet (11) and the heat-conducting bump (12) are made of aluminum alloy.

6. The new energy fast charging gun with overload protection according to claim 1, characterized in that, The threaded groove is provided with a sealing strip (13) made of high and low temperature resistant rubber.

7. The new energy fast charging gun with overload protection according to claim 1, characterized in that, The inner wall of the mounting groove is provided with an elastic arc block (14), and an arc groove is provided on one side of the controller (6), with the elastic arc block (14) abutting against the arc groove.

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