Charging plug for new energy electric vehicle

Abstract

A charging plug for a new energy electric vehicle disclosed by the present invention comprises a plug inner frame, the plug inner frame is provided with a ground wire terminal fixing groove, a zero line terminal fixing groove and a live wire terminal fixing groove, a ground wire terminal of the charging plug is connected in the ground wire terminal fixing groove, a zero line terminal of the charging plug is connected in the zero line terminal fixing groove, and a live wire terminal of the charging plug is connected in the live wire terminal fixing groove. A live wire terminal of the charging plug is connected in the live wire terminal fixing groove; between the live wire terminal fixing groove and the zero wire terminal fixing groove, the plug inner frame is provided with a temperature sensor positioning hole, and a temperature sensor of the plug is arranged in the temperature sensor positioning hole. The power line plug is compact in internal design structure and small in occupied space; and the plug is reasonable in internal design, easy to form and low in cost, so that the charging plug is low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of power cord plugs, and in particular to a charging plug for a new energy electric vehicle. Background Art

[0002] The power source of new energy electric vehicles is batteries, and batteries need to be charged frequently. In order to ensure the safety of electric vehicles during the charging process, traditional electric vehicle charging power cord plugs will have built-in temperature sensors inside, and the product temperature will be monitored through the real-time resistance feedback from the temperature sensor. When the temperature of the new energy electric vehicle charging plug rises during the charging process, when the temperature feedback from the resistance value of the temperature sensor in the control box reaches a certain value, the control box will automatically disconnect and the circuit will be broken. However, this method also has some disadvantages. For example, after adding a temperature sensor inside, the temperature sensor cannot be directly connected to the current-carrying line, but can only be connected to the signal line. The signal line needs to be added inside the wire. In the production process, due to the addition of temperature sensors and riveting terminals and other components, the production efficiency will be reduced and the production cost will increase. If the fixed position of the temperature sensor is too far away from the current-carrying line, the monitored temperature will be inaccurate, which will cause safety hazards during the charging process. Summary of the invention

[0003] The purpose of the present invention is to provide a charging plug for new energy electric vehicles, in which the plug terminal is arranged in a fixed groove, which is convenient for injection molding of the plug and improves the efficiency of socket assembly. The built-in temperature sensor of the plug is in the corresponding fixed groove on the inner frame of the plug, and the temperature sensor is fixed between the crimping area of ​​the live wire and the neutral wire terminal, which can accurately sense the temperature inside the plug and improve the charging safety of new energy electric vehicles.

[0004] In order to achieve the above technical purpose, the technical solution of the present invention is:

[0005] A charging plug for a new energy electric vehicle comprises an inner plug frame, wherein the inner plug frame is provided with a ground terminal fixing groove, a neutral terminal fixing groove and a live terminal fixing groove, wherein the ground terminal of the charging plug is connected in the ground terminal fixing groove, the neutral terminal of the charging plug is connected in the neutral terminal fixing groove, and the live terminal of the charging plug is connected in the live terminal fixing groove; between the live terminal fixing groove and the neutral terminal fixing groove, the inner plug frame is provided with a temperature sensor positioning hole, wherein the temperature sensor of the plug is provided in the temperature sensor positioning hole.

[0006] The temperature sensor is a cylindrical temperature sensor, and the temperature sensor is arranged along the axial direction of the live terminal. By placing the cylindrical temperature sensor in parallel with the live terminal and the neutral terminal, the detection range of the temperature sensor is increased, so that the temperature inside the plug can be accurately sensed, thereby improving the charging safety of new energy electric vehicles.

[0007] The ground wire terminal fixing groove is provided with a ground wire hole protrusion, and the ground wire terminal is provided with a ground wire hole. The ground wire hole protrusion of the ground wire terminal fixing groove is connected to the ground wire hole of the ground wire terminal.

[0008] The ground terminal is cylindrical, and the ground terminal fixing groove is provided with an arc-shaped enclosure wall. The arc-shaped enclosure wall partially surrounds the cylindrical ground terminal to block the cylindrical ground terminal, thereby preventing the ground terminal from being skewed, displaced, or deformed, thereby improving the installation effect and efficiency of the ground terminal.

[0009] The neutral terminal fixing groove and / or the live terminal fixing groove are provided with a limiting mechanism, and the limiting mechanism includes a terminal (neutral terminal and / or live terminal) and a terminal fixing groove (neutral terminal fixing groove and / or live terminal fixing groove), and the side wall of the terminal fixing groove is provided with a side wall protrusion, and the side wall protrusion limits the terminal in the terminal fixing groove. The terminal is placed in the terminal fixing groove, and the side wall protrusion blocks the terminal to prevent the terminal from escaping from the terminal fixing groove from the notch of the terminal fixing groove.

[0010] The side wall protrusion is arranged on the deformation part of the terminal fixing groove. When the terminal is placed in the terminal fixing groove, the terminal pushes the side wall protrusion, and the deformation part can be deformed, so that the side wall protrusion retreats backwards, so that the terminal can be inserted into the terminal fixing groove. By setting the deformation part, the protrusion can retreat backwards, which makes it easier for operators to assemble the terminal and improves production efficiency.

[0011] The plug inner frame is provided with a deformation gap at the deformation part, and the deformation gap is used to make way for the deformation part so that the deformation part deforms and the side wall protrusion retreats backwards.

[0012] The terminal fixing groove is a square groove.

[0013] The terminal is provided with a limiting groove, and the terminal fixing groove is clamped with the limiting groove. By clamping the limiting groove with the terminal fixing groove, the terminal can be limited to avoid the terminal from moving up and down, further improving the stability of the terminal connection and facilitating the subsequent installation of the charging plug.

[0014] The plug inner frame is provided with a first rivet terminal positioning hole and a second rivet terminal positioning hole, the temperature sensor includes a first temperature sensor lead and a second temperature sensor lead, the first temperature sensor lead is connected to the first signal line core through the first rivet terminal, the first rivet terminal is arranged in the first rivet terminal positioning hole, the second temperature sensor lead is connected to the second signal line core through the second rivet terminal, and the second rivet terminal is arranged in the second rivet terminal positioning hole. The two rivet terminals are respectively sleeved with double-layer heat shrink tubing and installed in the corresponding fixing grooves on the plug inner frame. The temperature sensor of this wiring method is not directly connected in series with the live wire and the neutral wire. The beneficial effect of this design does not have high requirements on the current and voltage borne by the temperature sensor, and it only needs to ensure that it remains in a conductive state under a low voltage of 3V, thereby directly reducing the development cost of the temperature sensor, and realizing the effect of rapid power-off through the resistance value received by the control box, which plays a good role in protecting the safety performance of the charging plug of the new energy electric vehicle during the charging process.

[0015] The working principle of the charging plug is: when the temperature exceeds the standard requirements, the resistance of the temperature sensor inside the plug increases. After the control box receives the high resistance, it automatically disconnects the power supply and the device stops charging. When the temperature returns to normal temperature, the resistance of the temperature sensor inside the plug is within the range. After the control box receives the resistance value within the standard range, it resumes power and starts charging normally.

[0016] The beneficial effects of the present invention are:

[0017] 1. A cylindrical temperature sensor is designed inside the plug, fixed between the crimping area of ​​the live and neutral terminals, which can accurately sense the temperature inside the plug.

[0018] 2. The inner frame of the plug is designed with a ground wire hole protrusion and an arc-shaped enclosure wall to prevent the ground wire terminal from displacement and deformation. The ground wire terminal is easily assembled to the designated position due to its open design. The operation is simple and the assembly efficiency is high.

[0019] 3. The inner frame is designed with a limit mechanism for the live and neutral terminals, and the open design makes it easy to assemble the live and neutral terminals, and the terminals are not easy to fall out after being assembled, effectively avoiding the problem of terminal falling out. The deformation gap of the inner frame has the beneficial effect of making the parts on both sides of the fixing groove of the live and neutral terminals elastic, which makes it easier for operators to assemble the live and neutral terminals, thereby improving production efficiency.

[0020] 4. The power cord plug has a beautiful appearance design, taking into account people's requirements for the use of the plug, enhancing the feel and making it easy to plug and unplug.

[0021] 5. The internal design of the power cord plug is compact, takes up little space and has an ingenious design.

[0022] 6. The internal design of the plug is reasonable, easy to shape, and takes cost into consideration, making this charging plug low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 This is an exploded view of the charging plug.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the inner frame of the plug.

[0026] Figure 3 It is a schematic diagram of the plane structure of the plug inner frame.

[0027] Figure 4 This is a schematic diagram of the first-person perspective structure of the internal terminal crimping of the charging plug.

[0028] Figure 5 This is a schematic diagram of the second-angle structural view of the internal terminal crimping of the charging plug.

[0029] Figure 6 This is a first-person structural diagram of the plug inner frame assembly.

[0030] Figure 7 This is a schematic diagram of the second perspective structure of the plug inner frame assembly.

[0031] Figure 8 This is the structural diagram of the injection mold inner mold of the charging plug.

[0032] Fig. 9 This is the external structure diagram of the injection molded charging plug. DETAILED DESCRIPTION

[0033] like Figure 1-9 As shown, a charging plug for a new energy electric vehicle includes a cable 3 and a plug inner frame 7, the cable 3 includes a ground wire core 3E, a live wire core 3L, a neutral wire core 3N, a first signal wire core 3S and a second signal wire core 3C, the ground wire core 3E is riveted to the ground wire terminal 4, the live wire core 3L is riveted to the live wire terminal 6, and the neutral wire core 3N is riveted to the neutral wire terminal 5. The temperature sensor 8 is a cylindrical temperature sensor, which includes a first temperature sensor lead 9 and a second sensor lead 10. The first signal wire core 3S is riveted to the first temperature sensor lead 9 through a first riveted terminal 11, and the first riveted terminal 11 is sleeved with a first double-wall heat shrink tube 12, and the second signal wire core 3C is riveted to the second temperature sensor lead 10 through a second riveted terminal 13, and the second riveted terminal 13 is sleeved with a second double-wall heat shrink tube 14.

[0034] The square neutral terminal 5 and the square live terminal 6 are both provided with limit grooves, such as Figure 1As shown, the limiting groove 51 on the neutral terminal 5. The cylindrical ground terminal 4 is provided with a ground hole 41.

[0035] like Figure 2-3 As shown, the plug inner frame 7 is provided with a ground terminal fixing groove 15, a live terminal fixing groove 16, a neutral terminal fixing groove 17, a second rivet terminal positioning hole 18, a first rivet terminal positioning hole 19, and a temperature sensor positioning hole 20. The temperature sensor positioning hole 20 is located between the live terminal fixing groove 16 and the neutral terminal fixing groove 17. The temperature sensor is inserted into the temperature sensor positioning hole 20, the first rivet terminal 11 is inserted into the first rivet terminal positioning hole 19, and the second rivet terminal 13 is inserted into the second rivet terminal positioning hole 18.

[0036] The ground terminal fixing groove 15 includes a semicircular arc-shaped enclosure wall 22 and a ground hole protrusion 21 in the ground terminal fixing groove 15. The ground terminal 4 is installed in the arc-shaped enclosure wall 22, and the ground hole protrusion 21 penetrates into the ground hole 41. The arc-shaped enclosure wall partially surrounds the cylindrical ground terminal and the ground hole protrusion 21, and the cylindrical ground terminal is limited, which can prevent the ground terminal from being skewed, displaced, and deformed, thereby improving the installation effect and efficiency of the ground terminal.

[0037] Both the live terminal fixing groove 16 and the neutral terminal fixing groove 17 are square grooves, and both the live terminal fixing groove 16 and the neutral terminal fixing groove 17 are provided with a limiting mechanism at the notch of the square groove. Figure 3 As shown, taking the live terminal fixing groove 16 as an example, the limiting mechanism includes a side wall protrusion 23 on the side wall of the live terminal fixing groove 16, and the side wall protrusion 23 is arranged on the deformation part 24. On the back of the deformation part 24, the plug inner frame 7 is provided with a deformation gap 25. When the limiting groove on the live terminal 6 is inserted into the square groove, the live terminal 6 squeezes the side wall protrusion 23, and the deformation part 24 deforms and gives way to the deformation gap 25 side, so that the live terminal 6 can be inserted into the live terminal fixing groove 16. After the live terminal 6 is inserted into the live terminal fixing groove 16, since the plug inner frame 7 is inserted into the limiting groove of the live terminal 6, the live terminal 6 is limited up and down. Since the live terminal 6 is arranged in the square groove, the reset side wall protrusion 23 abuts at the notch of the square groove, so that the live terminal 6 is horizontally limited to prevent the live terminal 6 from being separated from the plug inner frame from the notch. The limiting mechanism of the neutral terminal fixing slot 17 is designed based on the same principle as that of the live terminal fixing slot 16 , and the limiting mechanism of the neutral terminal fixing slot 17 is not described in detail here.

[0038] The charging plug comprises a plug inner mold 2 and a plug outer mold 1, the plug inner frame is arranged in the plug inner mold 2, the plug inner mold 2 is arranged in the plug outer mold 1, and the plug outer mold 1 is provided with an outer mold net tail rib 1S.

[0039] Assembly steps:

[0040] 1. According to the design requirements, peel the outer sheath of the cable 3, then peel the core wires of the ground wire core 3E, the live wire core 3L, the neutral wire core 3N, the first signal wire core 3S and the second signal wire core 3C, control the exposed length of the copper wire, and confirm the size after peeling to meet the requirements.

[0041] 2. Connect the ground wire core 3E and the ground wire terminal 4 into one by crimping.

[0042] 3. Connect the live wire core 3L and the live wire terminal 6 into one by crimping.

[0043] 4. Connect the neutral wire core 3N and the neutral wire terminal 5 into one by crimping.

[0044] 5. Connect the first signal line core 3S and the first temperature sensor lead 9 into one piece through the first riveting terminal 11.

[0045] 6. The first double-wall heat shrink tubing 12 is sheathed on the first riveted terminal 11 to achieve insulation effect.

[0046] 7. The second signal line core 3C and the second temperature sensor lead 10 are connected into one through the second rivet terminal 13. The second double-wall heat shrink tubing 14 is covered on the second rivet terminal 13 to achieve insulation effect.

[0047] 8. Insert the crimped ground terminal 4 into the ground terminal fixing groove 15 of the plug inner frame 7, insert the crimped live terminal 6 into the live terminal fixing groove 16 of the plug inner frame 7, and then insert the crimped neutral terminal 5 into the neutral terminal fixing groove 17 of the plug inner frame 7.

[0048] 9. Insert the crimped first rivet terminal 11 into the first rivet terminal positioning hole 19 of the plug inner frame 7, insert the crimped second rivet terminal 13 into the second rivet terminal positioning hole 18 of the plug inner frame 7, and then insert the temperature sensor 8 into the temperature sensor positioning hole 20 of the plug inner frame 7.

[0049] 10. After confirmation, the plug is injected. First, the inner mold is injected, and then the outer mold is injected. After the injection molding is completed, it is necessary to check whether the corresponding size and appearance meet the requirements according to the drawings, and whether the safety size meets the requirements.

[0050] The beneficial effects of this charging plug are:

[0051] 1. A cylindrical temperature sensor is designed inside the plug, which is fixed in the middle of the crimping area of ​​the live and neutral terminals, and can accurately sense the temperature inside the plug.

[0052] 2. The inner frame of the plug is designed with a ground wire hole protrusion and a semicircular arc-shaped enclosure wall to prevent the ground wire terminal from displacement and deformation. The ground wire terminal is easily assembled to the designated position due to its open design. The operation is simple and the assembly efficiency is high.

[0053] 3. The inner frame is designed with a limit mechanism for the live and neutral terminals, and the open design makes it easy to assemble the live and neutral terminals, and the terminals are not easy to fall out after being assembled, effectively avoiding the problem of terminal falling out. The deformation gap of the inner frame has the beneficial effect of making the parts on both sides of the fixing groove of the live and neutral terminals elastic, which makes it easier for operators to assemble the live and neutral terminals, thereby improving production efficiency.

[0054] 4. The power cord plug has a beautiful appearance design, taking into account people's requirements for the use of the plug, enhancing the feel and making it easy to plug and unplug.

[0055] 5. The internal design of the power cord plug is compact, takes up little space and has an ingenious design.

[0056] 6. The internal design of the plug is reasonable, easy to shape, and takes cost into consideration, making this charging plug low-cost.

[0057] The above embodiments do not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A charging plug for a new energy electric vehicle, characterized in that: The plug inner frame includes a ground terminal fixing groove, a neutral terminal fixing groove and a live terminal fixing groove, the ground terminal of the charging plug is connected to the ground terminal fixing groove, the neutral terminal of the charging plug is connected to the neutral terminal fixing groove, and the live terminal of the charging plug is connected to the live terminal fixing groove; the plug inner frame is provided with a temperature sensor positioning hole between the live terminal fixing groove and the neutral terminal fixing groove, and the temperature sensor of the plug is arranged in the temperature sensor positioning hole.

2. A charging plug for a new energy electric vehicle according to claim 1, characterized in that: The ground wire terminal fixing groove is provided with a ground wire hole protrusion, and the ground wire terminal is provided with a ground wire hole. The ground wire hole protrusion of the ground wire terminal fixing groove is connected to the ground wire hole of the ground wire terminal.

3. A charging plug for a new energy electric vehicle according to claim 1, characterized in that: The ground wire terminal is cylindrical, and the ground wire terminal fixing groove is provided with an arc-shaped enclosure wall.

4. A charging plug for a new energy electric vehicle according to claim 1, characterized in that: The neutral terminal fixing groove and / or the live terminal fixing groove are provided with a limiting mechanism, and the limiting mechanism includes a terminal and a terminal fixing groove. The side wall of the terminal fixing groove is provided with a side wall protrusion, and the side wall protrusion limits the terminal in the terminal fixing groove.

5. A charging plug for a new energy electric vehicle according to claim 4, characterized in that: The side wall protrusion is arranged on the deformation portion of the terminal fixing groove.

6. A charging plug for a new energy electric vehicle according to claim 5, characterized in that: The plug inner frame is provided with a deformation gap at the deformation portion.

7. A charging plug for a new energy electric vehicle according to claim 4, characterized in that: The terminal is provided with a limiting groove, and the terminal fixing groove is clamped in the limiting groove.

8. The charging plug for a new energy electric vehicle according to claim 1, characterized in that: The plug inner frame is provided with a first rivet terminal positioning hole and a second rivet terminal positioning hole, the temperature sensor includes a first temperature sensor lead and a second temperature sensor lead, the first temperature sensor lead is connected to the first signal line core through the first rivet terminal, the first rivet terminal is arranged in the first rivet terminal positioning hole, the second temperature sensor lead is connected to the second signal line core through the second rivet terminal, and the second rivet terminal is arranged in the second rivet terminal positioning hole.

9. The charging plug for a new energy electric vehicle according to claim 1, characterized in that: The temperature sensor is a cylindrical temperature sensor, and the temperature sensor is arranged along the axial direction of the live wire terminal.

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