A charging gun terminal with increased contact area

Abstract

The application provides a charging gun terminal with increased contact area, comprising a charging gun body provided with a terminal group and a charging gun terminal group; the charging gun terminal group comprises a first terminal group and a second terminal group; the first terminal group comprises a first terminal, a terminal seat, a pin terminal and a terminal inner spring; the terminal seat is in a cylindrical shape and is provided with a through hole penetrating in the axial direction; the first end of the pin terminal is adapted to be arranged in the middle of the through hole, and the second end of the pin terminal is located in the terminal seat; the terminal seat is surrounded by the terminal inner spring at the position corresponding to the second end of the pin terminal to form a terminal connecting groove, and the first terminal is inserted and fixed in the terminal connecting groove; the second terminal group is arranged in the same way as the first terminal group; the first terminal group and the second terminal group are adapted to be inserted into the accommodating groove of the charging gun body, so that the contact area of the charging gun is effectively increased, the high-temperature problem caused by charging is improved, and the service life of the charging gun is prolonged.

Description

Technical Field

[0001] This invention relates to the technical field of electric vehicle accessories, and more particularly to a charging gun terminal that increases the contact area. Background Technology

[0002] Charging guns are used to charge electric vehicles. There are specific national regulations governing the interfaces between the charging gun and the car battery to ensure compatibility between the charging station and the charging gun. Currently, charging guns often use detachable terminals that fit into the main body. However, because these terminals are typically solid, and the main body has grooves to match them for easy installation and removal, this method can easily lead to the charging gun overheating during charging, potentially causing damage and requiring replacement.

[0003] Therefore, there is an urgent need to propose a charging gun terminal that can quickly charge, is not prone to overheating, and has an increased contact area. Summary of the Invention

[0004] This invention proposes a charging gun terminal with increased contact area to more accurately solve the problem of small charging contact area and easy high-temperature damage in existing charging guns.

[0005] This invention is achieved through the following technical solution:

[0006] This invention proposes a charging gun terminal with increased contact area, including a charging gun terminal group mounted on the charging gun body; the charging gun terminal group includes a first terminal group and a second terminal group;

[0007] The first terminal group includes a first terminal, a terminal base, a pin terminal, and a terminal inner spring. The terminal base is cylindrical and has a through hole along the axial direction. The first end of the pin terminal is adapted to be disposed in the middle of the through hole, and the second end of the pin terminal is located in the terminal base.

[0008] The terminal holder has an inner spring surrounding its inner circumference at the position corresponding to the second end of the pin terminal to form a terminal connection groove, and the first terminal is inserted and fixed in the terminal connection groove.

[0009] The second terminal group is configured the same as the first terminal group, and both the first terminal group and the second terminal group are adapted to be inserted into the receiving slot opened in the charging gun body.

[0010] Furthermore, the first terminal includes a first end and a second end that are coaxially connected.

[0011] The first end face of the first terminal has a first hole along the axial direction, the outer periphery of the first terminal is adapted to the inner periphery of the terminal connecting groove, and the first hole is adapted to the second end of the pin terminal.

[0012] The second end of the first terminal is compatible with an external plug-in.

[0013] Furthermore, the end of the terminal block away from the inner spring of the terminal block is a recessed hole formed by the through hole and the pin terminal;

[0014] The outer periphery of the terminal block corresponding to the insertion hole is adapted to be inserted into the receiving groove of the charging gun body.

[0015] Furthermore, a first connecting rod is provided protruding from the bottom of the receiving groove along the center line direction, and the outer periphery of the first connecting rod is adapted and fixed to the inner periphery of the insertion hole.

[0016] Furthermore, the first terminal has an inclined strip with a raised inner circumferential surface along the port to the bottom of the first hole, and the inclined strip includes a plurality of such strips and is evenly distributed on the inner circumference of the first hole.

[0017] Furthermore, the terminal inner spring comprises multiple springs, which are evenly and equidistantly arranged on the inner periphery of the terminal seat.

[0018] Furthermore, the outer diameter of the second end of the pin terminal is φ6mm, the outer diameter of the first terminal is φ12mm, and the inner diameter of the first hole of the first terminal is φ6.9mm.

[0019] Furthermore, a ring of protrusion extends outward from the center of the pin terminal, with the first end of the pin terminal located on one side of the protrusion and the second end of the pin terminal located on the other side of the protrusion;

[0020] The second end of the pin terminal has a length of 13.5 mm.

[0021] Furthermore, it also includes a terminal support frame, which is disposed on the charging gun body and limits and fixes the first terminal group and the second terminal group.

[0022] Furthermore, the second terminal group is configured the same as the first terminal group, and is fixed on both sides of the center of the charging gun body respectively;

[0023] The distance between the pin terminals of the second terminal group and the pin terminals of the first terminal group is 34mm.

[0024] The charging gun terminal of the present invention, which increases the contact area, has the following advantages:

[0025] By setting up a first terminal group and a second terminal group, the first terminal group includes a first terminal, a terminal base, a pin terminal, and a terminal inner spring. The terminal base is cylindrical and has a through hole along its axis. The first end of the pin terminal is fitted into the middle of the through hole, and the second end of the pin terminal is located inside the terminal base. The terminal base has a terminal inner spring surrounding its inner circumference at the position corresponding to the second end of the pin terminal to form a terminal connection groove. The first terminal is inserted and fixed in the terminal connection groove. The second terminal group is set up in the same way as the first terminal group. Both the first and second terminal groups are fitted into the receiving groove opened in the charging gun body, which effectively increases the contact area of ​​the charging gun and prevents damage from high-temperature charging. Attached Figure Description

[0026] Figure 1 An exploded view of a one-direction structure of the charging gun terminal with increased contact area according to the present invention;

[0027] Figure 2 This is an exploded view of the charging gun terminal with increased contact area according to the present invention from another direction.

[0028] Figure 3 This is a schematic diagram of the combined structure of the charging gun terminals with increased contact area according to the present invention.

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0031] Please refer to Figures 1-3 This invention proposes a charging gun terminal with increased contact area, including a charging gun terminal assembly mounted on the charging gun body; the charging gun terminal assembly includes a first terminal assembly and a second terminal assembly; the first terminal assembly includes a first terminal 1, a terminal base 2, a pin terminal 3, and a terminal inner spring 4, the terminal base 2 is cylindrical and has a through hole 21 along the axial direction, the first end of the pin terminal 2 is adapted to be disposed in the middle of the through hole 21, and the second end of the pin terminal 3 is located in the terminal base 2; the terminal base 2 is surrounded by a terminal inner spring 4 along its inner circumference at the position corresponding to the second end of the pin terminal 3 to form a terminal connecting groove, and the first terminal 1 is inserted and fixed in the terminal connecting groove; the second terminal assembly is configured the same as the first terminal assembly, and both the first terminal assembly and the second terminal assembly are adapted to be inserted into a receiving groove opened in the charging gun body.

[0032] The charging gun terminal of the present invention, which increases the contact area, is applied to a charging gun. By electrically connecting the inner hole provided on the terminal of the charging gun to the pin terminal 3, and electrically connecting the outer periphery of the terminal of the charging gun to the terminal seat 2 of the charging gun, the charging contact area can be increased for charging, thereby improving the high temperature problem caused by charging.

[0033] In this embodiment, the charging gun terminal group is installed and fixed on the charging gun body. It can be fixed by a non-removable installation method or by a detachable installation method. The charging gun terminal assembly includes a first terminal assembly and a second terminal assembly, wherein the first terminal assembly and the second terminal assembly are the same terminal assembly. The first terminal assembly includes a first terminal 1, a terminal base 2, a pin terminal 3, and a terminal inner spring 4. The terminal base 2 is cylindrical and has a through hole 21 along the axial direction. The inner diameter of the middle part of the through hole 21 is adapted to the first end of the pin terminal 3. The inner diameters on both sides of the middle part of the through hole 21 are larger than the outer diameter of the pin terminal 3, so as to facilitate the insertion of the pin terminal 3 into the through hole 21 and fix the first end of the pin terminal 3 in the middle position of the through hole 21. The second end of the pin terminal 3 is also located in the terminal base 2, and the terminal inner spring 4 is surrounded on the inner circumference of the corresponding terminal base 2, so that the terminal base 2 and the terminal inner spring 4 form the circumferential surface of the terminal connection groove. The first terminal 1 is inserted into the terminal connection groove, and the outer circumferential surface of the first terminal 1 is adapted and fixed to the circumferential surface of the terminal connection groove.

[0034] In this embodiment, both the first terminal group and the second terminal group are adapted to be inserted into the receiving slots opened in the charging gun body. More specifically, there are two receiving slots. The terminal base 2 of the first terminal group is inserted and fixed into one of the receiving slots, and the terminal base 2 of the second terminal group is inserted and fixed into the other receiving slot. The terminal base 2 and the receiving slots can be fixedly connected by a detachable or non-detachable fixing method, both of which can realize the fast charging function of this application.

[0035] In this embodiment, the first terminal 1 includes a first end and a second end coaxially connected; the end face of the first end of the first terminal 1 is provided with a first hole 11 along the axial direction, the outer periphery of the first terminal 1 is adapted to the inner periphery of the terminal connecting groove, and the first hole 11 is adapted to the second end of the pin terminal 3; the second end of the first terminal 1 is adapted to an external plug-in.

[0036] In this embodiment, the first terminal 11 is cylindrical, with a first end and a second end at the two ends of the cylinder, which are coaxially arranged. A first hole 11 is formed on the end face of the first end of the first terminal 1 along the axial direction. The first hole 11 is adapted to the second end of the pin terminal 3, that is, the second end of the pin terminal 3 is adapted to be inserted into the first hole 11, and the outer periphery of the first terminal 1 is adapted to be inserted into the terminal connection groove, so as to increase the contact area of ​​the first terminal 1 and realize fast charging.

[0037] In this embodiment, the end of the terminal block 2 away from the inner spring 4 is a through hole and a recessed hole formed by the pin terminal 3; the terminal block 2 corresponding to the recessed hole is adapted to be inserted into the receiving groove of the charging gun body. A first connecting rod is provided protruding from the bottom of the receiving groove along the center line direction, and the outer periphery of the first connecting rod is adapted and fixed to the inner periphery of the recessed hole. The first connecting rod is adapted and fixed to the recessed hole to facilitate the fixing of the terminal block in the receiving groove. The first connecting rod can be integrally formed with the charging gun body or connected by means such as screws, that is, the first connecting rod and the charging gun body can be fixedly connected by a detachable or non-detachable connection method.

[0038] In this embodiment, an inclined strip 111 with a raised inner circumferential surface is provided along the inner periphery of the first hole 11 of the first terminal 1 from the port to the bottom of the hole. The inclined strip 111 includes a plurality of strips and is evenly distributed on the inner periphery of the first hole 11. With a plurality of inclined strips 111 in the first hole 11, when the first terminal 1 is inserted into the terminal connecting groove, the first hole 11 is tightly fitted onto the pin terminal 3, so as to facilitate stable insertion and removal of the first terminal 1 and increase the contact area of ​​the first terminal 1.

[0039] In this embodiment, multiple terminal inner springs 4 are evenly and equidistantly arranged on the inner circumference of the terminal base 2. The terminal inner springs 4 are annular in shape, and an inner groove 22 is provided within the terminal base 2 to accommodate them. The terminal inner springs 4 are installed and fixed within the inner groove 22. The terminal inner springs 4 protrude from the inner surface of the terminal base 2 so that when the first terminal 1 is inserted into the terminal base 2, the terminal inner springs 4 are compressed against the inner groove 22 of the terminal base 2, thereby adapting and fixing the outer circumference of the first terminal 1 to the inner circumference of the terminal base 2. Multiple terminal inner springs 4 are included; in one specific embodiment, three terminal inner springs 4 are evenly and equidistantly arranged on the inner circumference of the terminal base 2. Multiple terminal inner springs 4 are provided to facilitate better fixing and engagement with the first terminal 1.

[0040] In this embodiment, the outer diameter of the second end of the pin terminal 3 is φ6mm, the outer diameter of the first terminal 1 is φ12mm, and the inner diameter of the first hole 11 of the first terminal 1 is φ6.9mm. The outer diameter of the second end of the pin terminal 3 is φ6mm with a tolerance of -0.04mm, and the inner diameter of the first hole 11 of the first terminal 1 is φ6.9mm. Both the pin terminal 3 and the first terminal 1 are made of copper. When the pin terminal 3 is inserted into the first hole 11, it can be electrically connected to the first terminal 1, thereby charging the external battery to be charged through the first terminal 1. The outer diameter of the first terminal 1 is φ12mm, the inner diameter of the accessory to be charged that is adapted to the first terminal 1 is φ12mm, and the outer diameter of the first terminal 1 connected to the terminal connecting groove is φ12mm, which increases the contact area between the pin terminal 3 and the first terminal 1 and increases the conductive area.

[0041] In this embodiment, a protrusion 31 extends outward from the center of the pin terminal 3. The first end of the pin terminal 3 is located on one side of the protrusion 31, and the second end of the pin terminal 3 is located on the other side of the protrusion 31. The length of the second end of the pin terminal 3 is 13.5mm. The pin terminal 3 is made of copper (red copper). A countersunk hole is provided at the first end of the pin terminal 3 for connection and fixation with the terminal base 2, so that when the screw is inserted into the terminal base 2 for locking on the charging gun body, the tail of the screw is fixed in the countersunk hole of the pin terminal 3.

[0042] In this embodiment, the size of the first terminal 1 is adapted to the size of the terminal base 2. This effectively increases the conductive contact area during charging of the battery, i.e., increases the contact area between the inner and outer surfaces of the terminal, slowing down the rate of terminal heating. In actual measurements, after increasing the contact area, the temperature rise at the connection point of the charging terminal decreased from 35°C to 25°C, effectively improving the high temperature problem caused by charging, extending the service life of the charging gun, and improving safety during charging. A waterproof rubber ring groove is provided in the middle of the first terminal 1 to facilitate the placement of the rubber ring, ensuring waterproofing during assembly and use.

[0043] In this embodiment, the terminal block 2 is made of copper. It has a stepped arrangement along the axial direction on the outer periphery of the terminal block 2, and a groove for placing a rubber ring is provided in the middle of the outer periphery of the terminal block 2, so that the terminal block 2 can be effectively fixed and waterproofed when installed on the charging gun body.

[0044] In this embodiment, a terminal support frame is also included. The terminal support frame is disposed on the charging gun body and limits and fixes the first terminal group and the second terminal group. The terminal support frame is used to limit and fix the first terminal group and the second terminal group. The terminal support frame is disposed in the receiving groove and abuts against the charging gun terminal group. The terminal support frame is provided with a through groove for the charging terminal in the charging gun terminal group to pass through. The charging terminal passes through the through groove and protrudes from the receiving groove, so that when the user uses the charging gun to charge, the charging terminal can make an electrical connection and conduct electricity to the device to be charged. The addition of the main body support helps to better limit and fix the charging gun terminal group, preventing problems such as the charging terminal moving.

[0045] In this embodiment, the second terminal group is configured the same as the first terminal group, and is fixed on both sides of the center of the charging gun body respectively; the distance between the pin terminal 3 of the second terminal group and the pin terminal 3 of the first terminal group is 34mm. The tolerance of the distance between the pin terminal 3 of the first terminal group is ±0.05mm, the longitudinal distance between the two first through slots is 0, and the longitudinal distance between the central axis of the two first through slots and the central axis of the first arc-shaped wall is 1.2mm, with a tolerance of ±0.05mm. That is, the spacing between the charging terminals in the charging gun terminal group is precisely set. Furthermore, the center distance between the first terminal 1 and the second terminal is 34mm.

[0046] The charging gun terminal of the present invention increases the contact area by setting a first terminal group and a second terminal group. The first terminal group is provided with a first terminal 1, a terminal seat 2, a pin terminal 3 and a terminal inner spring 4. The terminal seat 2 is cylindrical and has a through hole 21 along the axial direction. The first end of the pin terminal 3 is adapted to be disposed in the middle of the through hole 21, and the second end of the pin terminal 3 is located in the terminal seat 2. The terminal seat 2 is surrounded by a terminal inner spring 4 along its inner circumference at the position corresponding to the second end of the pin terminal 3 to form a terminal connection groove. The first terminal 1 is inserted and fixed in the terminal connection groove. The second terminal group is arranged in the same way as the first terminal group. Both the first terminal group and the second terminal group are adapted to be inserted into the receiving groove opened in the charging gun body, which effectively increases the contact area of ​​the charging gun and prevents the charging gun from being damaged due to high temperature charging.

[0047] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A charging gun terminal with increased contact area, comprising a charging gun terminal assembly mounted on the charging gun body; characterized in that, The charging gun terminal group includes a first terminal group and a second terminal group; The first terminal group includes a first terminal, a terminal base, a pin terminal, and a terminal inner spring. The terminal base is cylindrical and has a through hole along the axial direction. The first end of the pin terminal is adapted to be disposed in the middle of the through hole, and the second end of the pin terminal is located in the terminal base. The terminal holder has an inner spring surrounding its inner circumference at the position corresponding to the second end of the pin terminal to form a terminal connection groove, and the first terminal is inserted and fixed in the terminal connection groove. The second terminal group has the same configuration as the first terminal group, and both the first terminal group and the second terminal group are adapted to be inserted into the receiving slot opened in the charging gun body; The receiving slot includes two slots. The terminal block of the first terminal group is inserted and fixed into one of the receiving slots, and the terminal block of the second terminal group is inserted and fixed into the other receiving slot. The terminal block and the receiving slot are fixedly connected by a detachable or non-detachable fixing method. The first terminal includes a first end and a second end that are coaxially connected. The first end face of the first terminal has a first hole along the axial direction, the outer periphery of the first terminal is adapted to the inner periphery of the terminal connecting groove, and the first hole is adapted to the second end of the pin terminal. The second end of the first terminal is compatible with an external plug-in.

2. The charging gun terminal with increased contact area according to claim 1, characterized in that, The end of the terminal block away from the inner spring of the terminal is a recessed hole formed by the through hole and the pin terminal; The outer periphery of the terminal block corresponding to the insertion hole is adapted to be inserted into the receiving groove of the charging gun body.

3. A charging gun terminal with increased contact area according to claim 2, characterized in that, The receiving groove has a first connecting rod protruding from the bottom of the groove along the center line direction, and the outer periphery of the first connecting rod is adapted and fixed to the inner periphery of the insertion hole.

4. A charging gun terminal with increased contact area according to claim 1, characterized in that, The first terminal has an inclined strip with a raised inner circumferential surface along the port to the bottom of the first hole. The inclined strip includes a plurality of such strips and is evenly distributed on the inner circumference of the first hole.

5. A charging gun terminal with increased contact area according to claim 4, characterized in that, The terminal inner springs include multiple springs, which are evenly and equidistantly arranged on the inner circumference of the terminal seat.

6. A charging gun terminal with increased contact area according to claim 1, characterized in that, The outer diameter of the second end of the pin terminal is φ6mm, the outer diameter of the first terminal is φ12mm, and the inner diameter of the first hole of the first terminal is φ6.9mm.

7. A charging gun terminal with increased contact area according to claim 1, characterized in that, A ring of protrusions extends outward from the center of the pin terminal, with the first end of the pin terminal located on one side of the protrusion and the second end of the pin terminal located on the other side of the protrusion. The second end of the pin terminal has a length of 13.5 mm.

8. A charging gun terminal with increased contact area according to claim 1, characterized in that, It also includes a terminal support frame, which is disposed on the charging gun body and limits and fixes the first terminal group and the second terminal group.

9. A charging gun terminal with increased contact area according to any one of claims 1-8, characterized in that, The second terminal group has the same configuration as the first terminal group, and is fixed on both sides of the center of the charging gun body respectively; The distance between the pin terminals of the second terminal group and the pin terminals of the first terminal group is 34mm.

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