Charging gun overheating detection device and charging gun

Abstract

The utility model provides a charging gun overheating detection device and a charging gun. The charging gun overheating detection device comprises a conductive member; the metal piece abuts against the plug pin of the charging gun, the metal piece and the conductive piece are arranged in a spaced mode, and the metal piece is configured to make contact with the conductive piece when the temperature of the plug pin of the charging gun is larger than a preset temperature threshold value; and the electric signal detection module is electrically connected with the conductive piece and used for detecting an electric signal on the conductive piece. The overheat detection device for the charging gun can detect whether the bolt of the charging gun is in an overheat state, and has the advantages of high reliability, strong anti-interference capability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging guns, in particular to a charging gun overheat detection device and a charging gun. BACKGROUND

[0002] During the charging process of a new energy vehicle, the charging port may be burned due to poor contact. Aging and rusting of the vehicle charging port or inelasticity of the socket spring may cause poor contact.

[0003] If the charging process lasts for a long time when the contact is poor, the contact part is prone to have a problem of excessively high heat generation, which may cause the port to be burned and the cable to heat, and in severe cases, may even cause the cable and the vehicle to catch fire.

[0004] At present, the charging gun is usually equipped with a port over-temperature protection function, that is, a temperature sensor is installed at the charging port of the vehicle. The temperature sensor is a low-voltage signal and is easily affected by external interference. The low-level analog signal is transmitted from the gun head to the internal MCU of the charging pile for signal processing. Since the cable of the charging gun is too long and is accompanied by a high-voltage power line, the signal transmitted by the temperature sensor is easily disturbed by the high-voltage signal, resulting in inaccurate detection results and possible misjudgment. CONTENT OF THE INVENTION

[0005] The present application aims to overcome the defects of the prior art and provide a charging gun overheat detection device and a charging gun to solve the problems in the prior art.

[0006] To solve the above problems, the first aspect of the embodiments of the present application provides a charging gun overheat detection device, comprising:

[0007] a conductive part;

[0008] a metal part abutting against a latch of the charging gun and spaced apart from the conductive part, the metal part being configured to be in contact with the conductive part when the temperature of the latch of the charging gun is greater than a preset temperature threshold;

[0009] an electrical signal detection module electrically connected to the conductive part and configured to detect an electrical signal on the conductive part.

[0010] In a possible implementation, the metal part comprises at least two metal sheets having different expansion coefficients, wherein the expansion coefficient of the metal sheet close to the latch is greater than the expansion coefficient of the metal sheet away from the latch.

[0011] In a possible implementation, the metal piece is provided with a first contact, and the conductive piece is provided with a second contact corresponding to the first contact, and when the temperature of the plug of the charging gun is greater than the preset temperature threshold, the first contact is in contact with the second contact.

[0012] In a possible implementation, the metal piece is used to bend towards the side of the conductive piece when the temperature of the plug of the charging gun is greater than the preset temperature threshold, so that the first contact is in contact with the second contact.

[0013] In a possible implementation, the charging gun further comprises:

[0014] The control switch is electrically connected with the electric signal detection module and the charging gun, and when the electric signal detection module detects that there is an electric signal on the conductive piece, the control switch disconnects the power supply of the charging gun.

[0015] In a possible implementation, the metal piece is attached to the outer surface of the plug of the charging gun; or,

[0016] The metal piece is attached to the connection between the plug and the charging gun wire.

[0017] In a possible implementation, the conductive piece is fixedly arranged on the charging gun.

[0018] In a possible implementation, one end of the conductive piece is provided with the second contact, and the other end is provided with a wire, wherein the wire is electrically connected with the electric signal detection module.

[0019] In a possible implementation, the electric signal detection module comprises a current detection module or / and a voltage detection module; when the temperature of the plug is greater than the preset temperature threshold, one end of the metal piece is connected with the plug, and the other end is connected with the conductive piece, wherein the electric signal detection module detects the current or / and the voltage on the conductive piece.

[0020] The second aspect of the embodiment of the application provides a charging gun, comprising a plug and a charging gun overheating detection device as described above, wherein the metal piece of the charging gun overheating detection device is in electrical contact with the plug.

[0021] The beneficial effects of the application include:

[0022] The charging gun overheating detection device provided by the application comprises a conductive piece, a metal piece and an electric signal detection module. The metal piece abuts against the plug of the charging gun and is arranged in a spaced manner with the conductive piece, and when the temperature of the plug of the charging gun is greater than a preset temperature threshold, the metal piece is in contact with the conductive piece.

[0023] When the charging gun is charging the vehicle, the metal part is in a charged state because it is in contact with the charging gun's pin, and due to heat conduction, the temperature of the metal part and the charging gun's pin remain consistent.

[0024] When the temperature of the charging gun's plug reaches an abnormal level and exceeds a preset threshold, the metal component contacts the conductive component, causing it to become electrically charged. Because the conductive component is electrically connected to the electrical signal detection module, the module can detect the electrical signal from the conductive component, thus notifying the charging gun of overheating.

[0025] In addition, since the metal parts are in contact with the conductive parts based on temperature changes, they will not be interfered with by high-voltage signals and have the characteristics of high reliability and strong anti-interference ability.

[0026] The charging gun overheat detection device can detect whether the plug of the charging gun is in an overheated state, and has the advantages of high reliability and strong anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of a charging gun overheat detection device is shown when the temperature of the charging gun pin is not greater than a preset temperature threshold;

[0029] Figure 2 A schematic diagram of a charging gun overheat detection device is shown when the temperature of the charging gun pin is greater than a preset temperature threshold;

[0030] Figure 3 A schematic diagram showing a metal part in an initial state;

[0031] Figure 4 Shown Figure 3 Schematic diagram of the metal parts after deformation due to temperature changes;

[0032] Figure 5 shows a schematic diagram of a conductive member;

[0033] Figure 6 A partial schematic diagram of a charging gun is shown.

[0034] Description of main component symbols:

[0035] 100 - electrically conductive piece; 110 - second contact; 120 - wire; 200 - metal piece; 210 - first metal sheet; 220 - second metal sheet; 230 - first contact; 300 - charging gun; 310 - plug; 400 - electric signal detection module; 500 - control switch. DETAILED DESCRIPTION

[0036] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for explanation of the present application, and cannot be understood as a limitation of the present application.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0038] Embodiments

[0039] Referring to Figure 1 , Figure 2 and Figure 6 In the present embodiment, a charging gun overheating detection device is proposed, comprising:

[0040] an electrically conductive piece 100;

[0041] a metal piece 200, the metal piece 200 abuts against the plug 310 of the charging gun 300, and is arranged in a spaced manner with the electrically conductive piece 100, the metal piece 200 is configured to be in contact with the electrically conductive piece 100 when the temperature of the plug 310 of the charging gun 300 is greater than a preset temperature threshold value;

[0042] an electric signal detection module 400, electrically connected with the electrically conductive piece 100, for detecting an electric signal on the electrically conductive piece 100.

[0043] In the present embodiment, the preset temperature threshold value is 80-120℃. Specifically, the preset temperature threshold value can be 80℃, 86℃, 93℃, 104℃, 112℃ or 120℃, etc. In addition to this, the preset temperature threshold value can also be an interval value, for example, in some embodiments, the preset temperature threshold value is 80-85℃, or 95-115℃, etc.

[0044] When the charging gun 300 is charging the vehicle, the metal piece 200 is in an electrified state due to the abutment of the metal piece 200 and the plug 310 of the charging gun 300, and the temperature of the metal piece 200 and the plug 310 of the charging gun 300 remains consistent under the action of heat conduction.

[0045] When the temperature of the plug 310 of the charging gun 300 is abnormal and greater than the preset temperature threshold, the metal piece 200 contacts the conductive piece 100, so that the conductive piece 100 is electrified. Since the conductive piece 100 is electrically connected with the electric signal detection module 400, the electric signal detection module 400 can detect the electric signal on the conductive piece 100, so as to know that the charging gun 300 is overheated. In addition, since the metal piece 200 contacts the conductive piece 100 based on the change of temperature, it will not be disturbed by the high-voltage signal, and has the characteristics of high reliability and strong anti-interference ability.

[0046] The metal piece 200 includes at least two metal sheets with different expansion coefficients, wherein the expansion coefficient of the metal sheet close to the plug 310 is greater than that of the metal sheet away from the plug 310.

[0047] The metal sheet with a higher thermal expansion coefficient is called an active layer, and the metal sheet with a lower thermal expansion coefficient is called a passive layer. Sometimes, in order to obtain specific performance, an intermediate layer can be added between the active layer and the passive layer to adjust the resistance or other performance. The metal piece 200 has unique thermal expansion characteristics and can produce bending, expansion or contraction when the temperature changes. The metal piece 200 has the characteristics of temperature sensitivity and excellent heat conductivity.

[0048] As shown in Figure 3 and Figure 4 In this embodiment, the metal piece 200 includes a first metal sheet 210 and a second metal sheet 220. Since the thermal expansion coefficients of the first metal sheet 210 and the second metal sheet 220 are different, when the temperature changes, the first metal sheet 210 and the second metal sheet 220 will produce different expansion or contraction, thereby causing the metal piece 200 as a whole to bend or twist.

[0049] As shown in Figure 3 and Figure 5 The metal piece 200 is provided with a first contact 230, and the conductive piece 100 is provided with a second contact 110 corresponding to the first contact 230. When the temperature of the plug 310 of the charging gun 300 is greater than the preset temperature threshold, the first contact 230 contacts the second contact 110; when the temperature of the plug 310 of the charging gun 300 is less than or equal to the preset temperature threshold, there is a gap between the first contact 230 and the second contact 110, that is, the first contact 230 does not contact the second contact 110.

[0050] In the embodiment, one end of the conductive piece 100 is provided with the second contact 110, and the other end is provided with the wire 120, wherein the wire 120 is electrically connected with the electric signal detection module 400.

[0051] The metal piece 200 is used to bend towards one side of the conductive piece 100 when the temperature of the plug 310 of the charging gun 300 is greater than the preset temperature threshold, so that the first contact 230 is in contact with the second contact 110.

[0052] In the embodiment, the charging gun overheating detection device further comprises a control switch 500.

[0053] The control switch 500 is electrically connected with the electric signal detection module 400 and the charging gun 300. When the electric signal detection module 400 detects that there is an electric signal on the conductive piece 100, the control switch 500 cuts off the power supply of the charging gun 300.

[0054] When the electric signal detection module 400 detects that there is an electric signal on the conductive piece 100, it means that the metal piece 200 is bent, and the first contact 230 on the metal piece 200 is in electrical contact with the second contact 110 on the conductive piece 100. Thus, it can be inferred that the temperature of the plug 310 of the charging gun 300 exceeds the preset temperature threshold, and the control switch 500 cuts off the power supply of the charging gun 300, thereby ensuring the safety of electricity use.

[0055] The installation position of the metal piece 200 can be set according to actual conditions:

[0056] When the plug 310 of the charging gun 300 is a female terminal, the metal piece 200 is attached to the outer surface of the plug 310 of the charging gun 300.

[0057] When the plug 310 of the charging gun 300 is a male terminal, the metal piece 200 is attached to the connection between the plug 310 and the wire of the charging gun 300.

[0058] The end of the metal piece 200 away from the first contact 230 can be in electrical contact with the plug 310 through bonding, welding, clamping and the like.

[0059] The conductive piece 100 is fixedly arranged on the charging gun 300. The conductive piece 100 can be fixed on the charging gun 300 by bonding, clamping, screw connection and the like, wherein the conductive piece 100 and the plug 310 of the charging gun 300 are insulated from each other.

[0060] The electric signal detection module 400 comprises a current detection module or / and a voltage detection module. When the temperature of the plug 310 is greater than a preset temperature threshold, the metal piece 200 is connected at one end to the plug 310 and at the other end to the conductive piece 100, wherein the electric signal detection module 400 detects the current or / and voltage on the conductive piece 100.

[0061] Specifically, the current detection module comprises a current detection circuit, and the voltage detection module comprises a voltage detection circuit. The current detection circuit and the voltage detection circuit can refer to the existing design, and will not be described herein.

[0062] As shown in the drawings, Figure 6 In this embodiment, a charging gun 300 is also provided.

[0063] The charging gun 300 comprises the plug 310 and the charging gun overheating detection device mentioned above, wherein the metal piece 200 of the charging gun overheating detection device is in electrical contact with the plug 310.

[0064] The charging gun overheating detection device comprises the conductive piece 100, the metal piece 200, the electric signal detection module 400 and the control switch 500. The metal piece 200 abuts against the plug 310 of the charging gun 300 and is arranged in a spaced manner with the conductive piece 100, and the metal piece 200 is in contact with the conductive piece 100 when the temperature of the plug 310 of the charging gun 300 is greater than a preset temperature threshold.

[0065] When the temperature of the plug 310 of the charging gun 300 is abnormal and greater than a preset temperature threshold during the charging process of the charging gun 300, the metal piece 200 is in contact with the conductive piece 100, so that the conductive piece 100 is electrified. Since the conductive piece 100 is electrically connected with the electric signal detection module 400, the electric signal detection module 400 can detect the electric signal on the conductive piece 100, so as to know that the charging gun 300 is overheated. When the electric signal detection module 400 detects the electric signal on the conductive piece 100, the control switch 500 disconnects the power supply of the charging gun 300, thereby ensuring the safety of the charging gun 300 and avoiding fire accidents and other safety accidents.

[0066] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0067] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A charging gun overheating detection device, characterized in that, The application relates to a charging gun overheating detection device. The application relates to a charging gun overheating detection device. The metal piece comprises at least two metal sheets with different expansion coefficients, wherein the expansion coefficient of the metal sheet close to the plug is greater than that of the metal sheet far from the plug. The metal piece is provided with a first contact point, and the conductive piece is provided with a second contact point corresponding to the first contact point.

2. The overheat detection device for a charging gun according to claim 1, characterized by, The metal piece is used to bend towards the side of the conductive piece when the temperature of the plug of the charging gun is greater than the preset temperature threshold, so that the first contact point is in contact with the second contact point.

3. The overheat detection device for a charging gun according to claim 2, characterized by, The application further relates to a charging gun overheating detection device.

4. The overheat detection device for a charging gun according to claim 3, characterized by The metal piece is attached to the outer surface of the plug of the charging gun; or 5. The overheat detection device for a charging gun according to claim 1, characterized by, The metal piece is attached to the connection between the plug and the charging gun wire. The conductive piece is fixedly arranged on the charging gun.

6. The overheat detection device for a charging gun according to claim 1, characterized by One end of the conductive piece is provided with the second contact point, and the other end is provided with a wire, wherein the wire is electrically connected with the electric signal detection module. The electric signal detection module comprises a current detection module or / and a voltage detection module; when the temperature of the plug is greater than the preset temperature threshold, one end of the metal piece is connected with the plug, and the other end is connected with the conductive piece, wherein the electric signal detection module detects the current or / and voltage on the conductive piece.

7. The overheat detection device for a charging gun according to claim 6, characterized by The application relates to a charging gun comprising a plug and the charging gun overheating detection device according to any one of claims 1-9, wherein the metal piece of the charging gun overheating detection device is in electrical contact with the plug.

8. The overheat detection device for a charging gun according to claim 3, characterized by, ​ 9. The overheat detection device for a charging gun according to claim 1, characterized by, ​ 10. A charging gun, characterized in that, ​

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