Charging line and power transmission system

Abstract

The embodiment of the utility model discloses a charging wire and an electric energy transmission system. A controllable switch is arranged on a control channel line of a charging line, a first impedance element is connected between a grid electrode and a source electrode of the controllable switch, a detection module is configured to output a control signal in response to being triggered, and a control module is configured to control the charging line according to the control signal output by the detection module. And the voltage of the first impedance element is controlled so as to control the on or off of the controllable switch. Therefore, the voltage difference can be eliminated when the charging wire is pulled out, so that a protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of charging, in particular to a charging line and an electric energy transmission system. Background Art

[0002] With the development of charging technology, the charging power is constantly increasing, and the charging voltage will also increase. However, in actual use, there is always a difficult problem to solve, that is, when the charging is completed and the user unplugs the charging cable, the terminals of the charging cable are separated under high voltage, and due to the large voltage difference, arcing will occur.

[0003] Arcing is a discharge phenomenon formed between electrodes when the current is disconnected. When the distance between the two electrodes becomes large enough, the current can no longer flow and an arc is generated. Arcing can cause great harm, such as damaging the charger, cable or charging line terminals, causing problems with charging next time. Therefore, how to eliminate arcing has become an important issue in the protection of chargers and electronic equipment. Utility Model Content

[0004] In view of this, the embodiment of the utility model provides a charging cable and a power transmission system, thereby enabling the charging cable to be powered off when unplugged, thus playing a protective role.

[0005] In a first aspect, an embodiment of the utility model provides a charging cable, the charging cable comprising:

[0006] The main body part includes a control channel line and a voltage bus;

[0007] The circuit part is configured to control the control channel line to be turned on or off, thereby turning the voltage bus on or off;

[0008] Among them, the circuit part includes:

[0009] a controllable switch connected between the control channel lines;

[0010] A first impedance element connected between the gate and the source of the controllable switch;

[0011] a detection module, configured to output a control signal in response to being triggered;

[0012] The control module is configured to control the voltage of the first impedance element according to the control signal output by the detection module to control the on or off of the controllable switch. In this way, the charging cable can be powered off when it is unplugged, which plays a protective role.

[0013] In some embodiments, the charging cable further comprises:

[0014] The voltage generating module is connected to the detecting module and is configured to output a first voltage in response to receiving a control signal, thereby indicating whether the control signal is received in the form of a voltage.

[0015] In some embodiments, the voltage generation module includes:

[0016] A step-down circuit, connected to the voltage bus, configured to convert a second voltage obtained from the voltage bus into a third voltage;

[0017] The inverter circuit is configured to convert the third voltage into the first voltage in response to receiving the control signal. Thus, the second voltage on the voltage bus can be converted into the third voltage and then supplied to the inverter circuit, thereby improving the reuse rate of the circuit, thereby reducing the circuit cost and reducing the circuit size.

[0018] In some embodiments, the charging cable further comprises:

[0019] The electronic identification chip is set on the power supply connection line to identify the voltage, current and name of the charging line. Therefore, when the charging line is connected to an electronic device, the device can read this information to read the specifications and performance of the cable for matching and adaptation.

[0020] In some embodiments, the control module includes:

[0021] A second impedance element, one end of which is connected to the voltage generating module; and

[0022] A third impedance element, connected between the other end of the second impedance element and the ground end;

[0023] The middle ends of the second impedance element and the third impedance element are connected to the gate of the controllable switch. Thus, a voltage divider circuit is formed by the second impedance element and the third impedance element to control the voltage value of the gate of the controllable switch according to the magnitude of the first voltage, thereby controlling the on or off of the controllable switch.

[0024] In some embodiments, the detection module is configured to:

[0025] When not triggered, a high level signal is output, and when triggered, a low level signal is output. Thus, whether the charging line is triggered is detected by the level output by the touch module, and the working state of the inverter circuit is controlled by the level output by the touch module.

[0026] In some embodiments, the step-down circuit is further configured to provide an operating voltage to the touch signal generator, thereby eliminating the need for an external power supply to provide voltage therefor, improving the reuse rate of the circuit, thereby reducing circuit cost and circuit size.

[0027] In some embodiments, the detection module is configured to output a control signal in response to receiving a human body touch, thereby preventing a non-human body part from accidentally touching the detection module during charging, causing the controllable switch to shut down and the voltage bus to stop supplying power.

[0028] In a second aspect, an embodiment of the utility model provides an electric energy transmission system, the electric energy transmission system comprising:

[0029] Charging lines, including control channel lines, voltage bus lines, and power supply connection lines; and

[0030] Charging plug, connected to the charging cable;

[0031] Among them, the charging cable includes:

[0032] The main body part includes a control channel line and a voltage bus;

[0033] The circuit part is configured to control the control channel line to be turned on or off, thereby turning the voltage bus on or off;

[0034] Among them, the circuit part includes:

[0035] a controllable switch connected between the control channel lines;

[0036] A first impedance element connected between the gate and the source of the controllable switch;

[0037] a detection module, configured to output a control signal in response to being triggered;

[0038] The control module is configured to control the voltage of the first impedance element according to the control signal output by the detection module to control the on or off of the controllable switch. In this way, the charging cable can be powered off when it is unplugged, which plays a protective role.

[0039] In some embodiments, the system further comprises:

[0040] The voltage generating module is connected to the detecting module and is configured to output a first voltage in response to receiving a control signal, thereby indicating whether the control signal is received in the form of a voltage.

[0041] In some embodiments, the voltage generation module includes:

[0042] A step-down circuit, connected to the voltage bus, configured to convert a second voltage obtained from the voltage bus into a third voltage;

[0043] The inverter circuit is configured to convert the third voltage into the first voltage in response to receiving the control signal. Thus, the second voltage on the voltage bus can be converted into the third voltage and then supplied to the inverter circuit, thereby improving the reuse rate of the circuit, thereby reducing the circuit cost and reducing the circuit size.

[0044] In some embodiments, the system further comprises:

[0045] The electronic identification chip is set on the power supply connection line to identify the voltage, current and name of the charging line. Therefore, when the charging line is connected to an electronic device, the device can read this information to read the specifications and performance of the cable for matching and adaptation.

[0046] In some embodiments, the control module includes:

[0047] A second impedance element, one end of which is connected to the voltage generating module; and

[0048] A third impedance element, connected between the other end of the second impedance element and the ground end;

[0049] The middle ends of the second impedance element and the third impedance element are connected to the gate of the controllable switch. Thus, a voltage divider circuit is formed by the second impedance element and the third impedance element to control the voltage value of the gate of the controllable switch according to the magnitude of the first voltage, thereby controlling the on or off of the controllable switch.

[0050] In some embodiments, the detection module is configured to:

[0051] When not triggered, a high level signal is output, and when triggered, a low level signal is output. Thus, whether the charging line is triggered is detected by the level output by the touch module, and the working state of the inverter circuit is controlled by the level output by the touch module.

[0052] In some embodiments, the step-down circuit is further configured to provide an operating voltage to the touch signal generator, thereby eliminating the need for an external power supply to provide voltage therefor, improving the reuse rate of the circuit, thereby reducing circuit cost and circuit size.

[0053] In some embodiments, the detection module is configured to output a control signal in response to receiving a human body touch, thereby preventing a non-human body part from accidentally touching the detection module during charging, causing the controllable switch to shut down and the voltage bus to stop supplying power.

[0054] In some embodiments, the charging plug is configured to supply power to the voltage bus when the control channel line is turned on, and to stop supplying power to the voltage bus when the control channel line is turned off.

[0055] The technical solution of the embodiment of the utility model is to set a controllable switch on the control channel line of the charging line, the first impedance element is connected between the gate and the source of the controllable switch, the detection module is configured to output a control signal in response to being triggered, and the control module is configured to control the voltage of the first impedance element according to the control signal output by the detection module to control the on or off of the controllable switch. In this way, the voltage difference can be eliminated when the charging line is unplugged to play a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The above and other purposes, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0057] Figure 1 is a schematic diagram of an electric energy transmission system according to an embodiment of the utility model;

[0058] Figure 2 is a circuit diagram of a charging cable of the first embodiment of the utility model;

[0059] Figure 3 is a circuit diagram of a charging cable of a second embodiment of the utility model;

[0060] Figure 4 is an equivalent circuit diagram of the charging cable in the initial state of the second embodiment of the utility model;

[0061] Figure 5 This is an equivalent circuit diagram of the charging line of the second embodiment of the utility model after being triggered;

[0062] Figure 6 is a circuit diagram of a charging cable of a third embodiment of the utility model;

[0063] Figure 7 is a schematic diagram of a charging cable according to an embodiment of the utility model;

[0064] Figure 8 is a schematic diagram of another charging cable according to an embodiment of the utility model;

[0065] Fig. 9 It is a schematic diagram of another charging cable according to an embodiment of the utility model. DETAILED DESCRIPTION

[0066] The present application is described below based on embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, some specific details are described in detail. It is possible for those skilled in the art to fully understand the present application without the description of these details. In order to avoid confusing the essence of the present application, known methods, processes, flows, components and circuits are not described in detail.

[0067] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0068] At the same time, it should be understood that in the following description, "circuit" refers to a conductive loop composed of at least one element or subcircuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another element or an element / circuit is said to be "connected between" two nodes, it can be directly coupled or connected to another element or there can be an intermediate element, and the connection between the elements can be physical, logical, or a combination thereof. On the contrary, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.

[0069] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0070] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0071] When using the existing power transmission system, when the user unplugs the cable, the high voltage between the charging cable terminals is disconnected. At this time, due to the large voltage difference, an arc phenomenon will occur. The arc phenomenon is a phenomenon in which when the voltage difference is large enough, the gas molecules in the air are ionized to form a conductive channel, causing current to pass through the air. The arc phenomenon is very harmful, such as damaging the terminals of the charger, cable, or device charging cable, causing the next charging problem. In some application scenarios, anti-arc technology or measures are needed to ensure safe and stable operation when plugging and unplugging cables.

[0072] The embodiment of the utility model improves the prior art. Specifically, a control circuit is set on the cable of the charging cable to obtain a cable with arc protection function, thereby eliminating the arc phenomenon and protecting the electronic equipment. The charging cable of the embodiment of the utility model uses a touch control method to replace the traditional mechanical switch method, and uses an N-channel junction field effect transistor (N-JFET) and utilizes its low internal resistance characteristics under normal conditions. It also adopts a special control method for the circuit by using a power inverter to obtain a negative voltage according to a positive voltage.

[0073] Figure 1 Schematic diagram of the power transmission system of the utility model embodiment. Figure 1As shown, the power transmission system includes a charging plug 1 and a charging line 2, and the charging plug 1 is connected to the charging line 2.

[0074] The charging plug 1 is a power supply conversion device that can obtain an external power supply signal and convert the external power supply signal into a DC voltage output of a predetermined specification (predetermined current, predetermined voltage, predetermined power).

[0075] When charging is performed using a charging plug, the charging plug 1 is connected to a power source 4 to obtain voltage from the power source 4 and output it after conversion. The power source 4 may be an AC power source of 220V or 380V.

[0076] One end of the charging cable 2 is connected to the charging plug 1 , and the other end is connected to the electronic device 3 , so as to transmit the voltage output by the charging plug 1 to the electronic device 3 , so as to charge and / or supply power to the electronic device 3 .

[0077] The charging plug 1 and the charging cable 2 may be fixedly connected or movably connected in a pluggable manner, and the embodiment of the utility model does not limit the specific implementation method.

[0078] It should be noted that the embodiment of the utility model does not limit the specific implementation method of the charging plug 1 charging and / or powering the electronic device through the charging cable 2, which can be implemented based on various existing methods. At the same time, the charging cable can be various types of charging cables, such as Lightning interface, Micro USB interface, Type-C interface, etc., and the embodiment of the utility model does not limit this.

[0079] For ease of explanation, the embodiment of the utility model is described by taking the charging cable of the Type-C interface as an example. Type-C is a USB (Universal Serial Bus) interface appearance standard, which can be divided into a socket (or female socket) and a plug (or male socket), with the connector of the charging cable as the plug. For the purpose of explanation, the Type-C interface includes TX / RX pins, D+ / D- pins, SBU pins, CC pins, VBUS pins, GND pins and VCONN pins. Among them, the TX / RX pins are high-speed differential signal pins, the D+ / D- pins are used to connect the USB2.0 differential signal pins, and the CC pins are channel configuration pins, which can perform functions such as cable connection and removal detection, socket / plug direction detection and current broadcasting, and can also be used for Power Delivery and Alternate Mode. The communication required. The SBU pin corresponds to the low-speed signal path used in the alternate mode. The VBUS pin and the GND pin are the return paths for power and signals. The VCONN pin is an active cable and an electronically marked cable.

[0080] Corresponding to the pins, the charging line includes a control channel line (CC signal line), a voltage bus (VBUS line), etc. Among them, the control channel line is connected to the CC pin, the voltage bus is connected to the VBUS pin, and the power supply connection line is connected to the VCONN pin.

[0081] Furthermore, the charging cable also includes a controllable switch connected between the control channel lines; a detection module configured to output a control signal in response to being triggered; a voltage generation module connected to the detection module and configured to output a first voltage in response to receiving a control signal; and a control module connected to the voltage generation module and configured to control the controllable switch to turn off in response to the voltage generation module outputting the first voltage, so that the control channel line is disconnected, thereby disconnecting the voltage bus. In some embodiments, the detection module is configured to output a control signal in response to receiving a human touch. This is to avoid the controllable switch being turned off and the voltage bus stopping supplying power due to a non-human body part accidentally touching the detection module during the charging process.

[0082] Specifically, after charging is completed, the charging cable 2 needs to be manually unplugged from the charging plug 1. When unplugging the charging cable from the charging plug, it is necessary to press the port portion of the charging cable 2 connected to the charging plug 1 with your hand to be able to unplug it. At this time, since the detection module is triggered during the squeezing process, the detection module transmits the control signal to the voltage generation module, and the voltage module outputs a first voltage to control the controllable switch to turn off through the control module. Since the controllable switch is configured on the control channel line, the control channel line is turned off at this time, the charging plug 1 recognizes that the control channel line is turned off, the communication signal is disconnected, the power transmission system stops supplying power, and the voltage bus is turned off, so that the voltage of the voltage bus is reduced to 0V. At this time, the charging cable of the C-type cable is unplugged. Since the voltage value on the voltage bus is 0, there is no arc phenomenon, thereby protecting the power transmission system and the electronic equipment.

[0083] Figure 2 : is a circuit diagram of a charging cable according to a first embodiment of the utility model, Figure 2 As shown, the charging cable includes:

[0084] The main body part includes control channel lines and voltage buses.

[0085] The circuit part is configured to control the control channel line to be turned on or off, thereby turning the voltage bus on or off. The circuit part includes:

[0086] a controllable switch Q connected between the control channel lines;

[0087] A first impedance element R1, connected between the gate and the source of the controllable switch;

[0088] The detection module 21 is configured to output a control signal in response to being triggered;

[0089] The control module 22 is configured to control the voltage of the first impedance element according to the control signal output by the detection module, so as to control the on or off of the controllable switch.

[0090] Figure 3 : is a circuit diagram of a charging cable according to a second embodiment of the present utility model. Figure 3 As shown, the charging cable includes a main body portion and a circuit portion.

[0091] Among them, the main body part includes a voltage bus VBUS, a control channel line CC, a power connection line VCONN, a high-speed differential signal line TX / RX, etc. The voltage bus (VBUS) is used to supply power to the charging line, and the control channel line (CC) is used to perform functions such as cable connection and removal detection, socket / plug direction detection and current broadcasting. It can also be used for the communication required for Power Delivery and Alternate Mode. The main function of the power connection line (VCONN) is to provide power for additional devices. In an embodiment of the utility model, the E-Marker chip is powered through a specific pin. The transmission line (TX) in the high-speed differential signal line (TX / RX) converts the data to be sent into an electrical signal, and then transmits the electrical signal to the receiving end through a transmission medium, thereby realizing data transmission; and the receiving line (RX) converts the received electrical signal into data at the receiving end, so that the receiving device can read and process the data.

[0092] It should be understood that Figure 3 The main body portion of the charging cable only shows a portion of the structure of the charging cable, and the charging cable also includes other signal lines.

[0093] The circuit part of the charging line includes a detection module 31, a voltage generation module 32, a control module 33, a controllable switch Q and a first impedance element R1. The function of the circuit part is specifically that in response to receiving a touch, the controllable switch is turned off to control the turn-off of the control channel line.

[0094] The detection module 31 is configured to output a high-level signal in response to not being triggered, and to output a high-level signal in response to being triggered. The triggering mode of the detection module 31 is to respond to receiving a touch. Specifically, the detection module 31 is implemented by a touch contact point 311 and a touch signal generator 312. Specifically, the touch contact point 311 is mainly responsible for sensing human contact, and the touch signal generator 312 is responsible for responding to the touch contact point 311 being touched by a human body, outputting a low-level signal to control the opening of the inverter circuit 322.

[0095] The voltage generating module 32 includes a step-down circuit 321 and an inverter circuit 322. The step-down circuit is connected to the voltage bus and is configured to convert the second voltage obtained from the voltage bus into a third voltage. Specifically, the high voltage on the voltage bus is converted into a low voltage to provide power for the circuit. In some embodiments, the step-down circuit 321 can be a low voltage drop linear regulator. The inverter circuit 322 is connected to the step-down circuit 321 and the detection module 31 and is configured to be low level triggered. In response to receiving a low level control signal, the inverter circuit 322 converts the third voltage into a first voltage. Specifically, the third voltage with a positive value is converted into a first voltage with the same magnitude and opposite direction, thereby indirectly controlling the conduction or shutdown of the controllable switch Q. The touch signal generator 312 is also connected to the step-down circuit 321 to obtain the working voltage, thereby eliminating the need for an external power supply to provide voltage for it, thereby saving energy.

[0096] The control module 33 specifically includes a second impedance element R2, one end of which is connected to the voltage generating module, and a third impedance element R3, which is connected between the other end of the second impedance element R2 and the ground. The middle ends of the second impedance element R2 and the third impedance element R3 are connected to the gate of the controllable switch. Specifically, the second impedance element R2 and the third impedance element R3 constitute a voltage divider circuit to control the voltage value of the gate of the controllable switch according to the magnitude of the first voltage, thereby controlling the on or off of the controllable switch.

[0097] The first impedance element R1 , the second impedance element R2 and the third impedance element R3 are all resistors.

[0098] The controllable switch Q is specifically an N-channel junction field effect transistor (N-JFET), including a source s, a gate g and a drain d. The source s is the input pin of the field effect transistor, and the gate g controls the on and off of the device by changing its voltage. The working mode of the N-JFET is specifically in response to V gs The value of is less than -3V, and the internal resistance of the controllable switch Q increases until it turns off. gs =0, the controllable switch Q is turned on. The first impedance element R1 is connected between the gate and source of the controllable switch, and its function is to provide V gs =0V bias condition. Where V gs is the difference between the gate voltage and the source voltage of the controllable switch.

[0099] In some embodiments, the charging cable also includes an electronic identification chip (E-Marker) 34, which is connected to the power connection line (VCONN) and powered by the power connection line, and is used to identify the voltage, current and name of the charging cable. When the charging cable is connected to an electronic device, the device can read this information to read the specifications and performance of the cable for matching and adaptation. By reading the information in the electronic identification chip 34, the electronic device can understand the current carrying capacity of the cable, thereby adjusting the power supply mode to ensure stable and safe transmission of the current.

[0100] Figure 4 is an equivalent circuit diagram of the charging line in the initial state of the second embodiment of the utility model, such as Figure 4 As shown, when the charging line is in normal working state, the detection module 31 is not triggered, and the control signal it outputs is high level. The buck circuit 321 converts the voltage on the voltage bus (i.e., the second voltage) to 3.3V (i.e., the third voltage). After the inverter circuit 322 receives the high level control signal and the third voltage, the inverter circuit 322 does not work because it is configured to be triggered at a low level. Due to the voltage difference V between the gate and the source of the controllable switch gs If the shutdown condition is not met, the controllable switch Q is turned on and the configuration signal line works normally.

[0101] Figure 5 : is an equivalent circuit diagram of the charging line of the second embodiment of the utility model after being triggered. Figure 5 As shown, when the charging cable is unplugged, the detection module 31 is triggered, and the control signal it outputs is low level. The step-down circuit 321 converts the voltage on the voltage bus (i.e., the second voltage) to 3.3V (i.e., the third voltage). After the inverter circuit 322 responds to receiving the low-level control signal and the third voltage, since the inverter circuit 322 is configured to be triggered at a low level, the output signal of the inverter circuit 322 is the opposite of the third voltage, i.e., -3.3V. Taking the resistance of the second impedance element R2 as 4.7kΩ and the resistance of the third impedance element R3 as 100kΩ as an example, through the voltage division of the second impedance element R2 and the third impedance element R3, the voltage at the middle end of the second impedance element R2 and the third impedance element R3, that is, the gate voltage of the controllable switch Q is approximately -3.15V. Since the voltage on the configuration signal line is 1.6V, the difference V between the gate voltage and the source voltage of the controllable switch gs =-3.15-1.6=-4.75V, the controllable switch Q is turned off, the configuration signal line is disconnected, and then the voltage bus is disconnected.

[0102] Figure 6 : is a circuit diagram of a charging cable according to a second embodiment of the present utility model. Figure 6As shown, the difference between the second embodiment and the third embodiment is that one port of the charging cable in the third embodiment is welded to the charging plug. At this time, the function of the electronic identification module (E-marker) in the cable is integrated at the charging plug end. The charging plug does not need to read the E-marker information of the cable, so there is no need to set an electronic identification chip. D+ and D- represent the positive and negative signals of the charging cable, and interact with the electronic device by transmitting voltage signals that change according to a certain rule. The working principle of detecting the unplugging action is similar to Figure 2 The control principle is consistent with that described in Figure 2 The control principle of the first embodiment is exactly the same as that of the first embodiment, and the embodiment of the utility model will not be described in detail here.

[0103] Figure 7 Schematic diagram of a charging cable according to an embodiment of the utility model. Figure 7 As shown, taking the Type C interface as an example, the difference between the charging cable shown and the prior art is that both Type C ports of the charging cable are provided with Figure 2 The circuit shown is 71 and 72 in the figure.

[0104] Figure 8 Schematic diagram of another charging cable of the present utility model embodiment. Taking the C-type interface as an example, Figure 8 As shown, the circuit is only designed for one Type-C port of the charging cable, namely 81 in the figure.

[0105] Fig. 9 Schematic diagram of another charging cable of the present utility model. Taking a C-type interface at one end and an open cable at the other end as an example, the open cable can be connected to various types of interfaces or devices, that is, the open cable is used to adapt to the connection requirements between different interface standards and to achieve interconnection between devices. At this time, the circuit is set on the C-type port, that is, 91 in the figure.

[0106] It should be noted that the three charging line control methods shown in the above three schematic diagrams are Figure 1 Some of them have been described, so I won’t repeat them here.

[0107] In the embodiment of the utility model, a controllable switch is arranged on the control channel line of the charging line, a first impedance element is connected between the gate and the source of the controllable switch, a detection module is configured to output a control signal in response to being triggered, and a control module is configured to control the voltage of the first impedance element according to the control signal output by the detection module to control the on or off of the controllable switch. Thus, the voltage difference can be eliminated when the charging line is unplugged to play a protective role.

[0108] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A charging cable, characterized in that: The charging cable comprises: The main body part includes a control channel line and a voltage bus; A circuit part, configured to control the control channel line to be turned on or off, thereby turning the voltage bus on or off; Wherein, the circuit part includes: a controllable switch connected between the control channel lines; A first impedance element connected between the gate and the source of the controllable switch; a detection module, configured to output a control signal in response to being triggered; The control module is configured to control the voltage of the first impedance element according to the control signal output by the detection module, so as to control the on or off of the controllable switch.

2. The charging cable according to claim 1, characterized in that: The charging cable also includes: The voltage generating module is connected to the detecting module and is configured to output a first voltage in response to receiving the control signal.

3. The charging cable according to claim 2, characterized in that: The voltage generating module comprises: a step-down circuit, connected to the voltage bus, and configured to convert a second voltage obtained from the voltage bus into a third voltage; The inverter circuit is configured to convert the third voltage into the first voltage in response to receiving a control signal.

4. The charging cable according to claim 1, characterized in that: The charging cable also includes: The electronic identification chip is set on the power supply connection line and is used to identify the voltage, current and name of the charging line.

5. The charging cable according to claim 2, characterized in that: The control module comprises: A second impedance element, one end of which is connected to the voltage generating module; and a third impedance element, connected between the other end of the second impedance element and the ground end; The middle ends of the second impedance element and the third impedance element are connected to the gate of the controllable switch.

6. The charging cable according to claim 3, characterized in that: The detection module is configured as follows: It outputs a high level signal when not triggered and a low level signal when triggered.

7. The charging cable according to claim 6, characterized in that: The step-down circuit is further configured to provide an operating voltage to the touch signal generator.

8. The charging cable according to any one of claims 1 to 7, characterized in that: The detection module is configured to output a control signal in response to receiving a human body touch.

9. An electric energy transmission system, characterized in that: The electric energy transmission system comprises: Charging lines, including control channel lines, voltage bus lines, and power supply connection lines; and A charging plug connected to the charging cable; Wherein, the charging cable comprises: The main body part includes a control channel line and a voltage bus; A circuit part, configured to control the control channel line to be turned on or off, thereby turning the voltage bus on or off; Wherein, the circuit part includes: a controllable switch connected between the control channel lines; A first impedance element connected between the gate and the source of the controllable switch; a detection module, configured to output a control signal in response to being triggered; The control module is configured to control the voltage of the first impedance element according to the control signal output by the detection module, so as to control the on or off of the controllable switch.

10. The system according to claim 9, characterized in that The charging cable also includes: The voltage generating module is connected to the detecting module and is configured to output a first voltage in response to receiving the control signal.

11. The system according to claim 10, characterized in that The voltage generating module comprises: a step-down circuit, connected to the voltage bus, and configured to convert a second voltage obtained from the voltage bus into a third voltage; The inverter circuit is configured to convert the third voltage into the first voltage in response to receiving a control signal.

12. The system according to claim 9, characterized in that The charging cable also includes: The electronic identification chip is set on the power supply connection line and is used to identify the voltage, current and name of the charging line.

13. The system according to claim 10, characterized in that The control module comprises: A second impedance element, one end of which is connected to the voltage generating module; and a third impedance element, connected between the other end of the second impedance element and the ground end; The middle ends of the second impedance element and the third impedance element are connected to the gate of the controllable switch.

14. The system according to claim 11, characterized in that The detection module is configured as follows: It outputs a high level signal when not triggered and a low level signal when triggered.

15. The system according to claim 14, characterized in that The step-down circuit is further configured to provide an operating voltage to the touch signal generator.

16. The system according to any one of claims 9 to 15, characterized in that: The detection module is configured to output a control signal in response to receiving a human body touch.

17. The system according to any one of claims 9 to 15, characterized in that: The charging plug is configured to supply power to the voltage bus when the control channel line is turned on, and to stop supplying power to the voltage bus when the control channel line is turned off.

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