Bidirectional charging detection wire rod

Abstract

A bidirectional charging detection wire rod comprises a charging loop, the charging loop comprises a first interface, a second interface, a power line and a reference line, the power line is connected between a power terminal of the first interface and a power terminal of the second interface, the reference line is connected between a grounding terminal of the first interface and a grounding terminal of the second interface, and the bidirectional charging detection wire rod further comprises a detection resistor R1, the detection resistor R1 is arranged on a reference line, and the first end of the detection resistor R1 is connected with a grounding end; the main control circuit is used for detecting the first voltage and judging the direction of the charging current according to the first voltage; and the voltage division circuit is used for converting the first voltage into the second voltage. Compared with the prior art, the embodiment of the invention adopts a single detection resistor design, so that the problem of internal resistance increase caused by multiple detection resistors in the prior art is effectively avoided, and the charging efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of charging technology, and in particular to a bidirectional charging detection wire. Background Art

[0002] With the continuous development of electronic equipment technology, the Type-C interface is gradually becoming the mainstream interface due to its advantages such as support for reversible plugging and unplugging, fast transmission speed, and strong compatibility. In order to meet users' needs for convenience and unification, more and more cables on the market have adopted the design of Type-C interfaces on both ends. This type of cable not only supports forward charging, but also reverse charging, greatly improving the applicability of the cable.

[0003] The existing two-terminal Type-C cables achieve current detection by adding multiple detection resistors, which will increase the internal resistance and reduce the charging efficiency. The use of operational amplifier circuits complicates the design, increases costs and power consumption, and also causes heat accumulation problems in fast charging high-voltage scenarios, making it difficult to meet the efficient and stable charging needs of existing users. Summary of the invention

[0004] The object of the present invention is to provide a bidirectional charging detection cable in view of the defects and shortcomings of the prior art, including a charging circuit, the charging circuit including a first interface, a second interface, a power line and a reference line, the charging circuit can realize reverse charging from the first interface to the second interface, and forward charging from the second interface to the first interface, the power line is connected between the power terminal of the first interface and the power terminal of the second interface, the reference line is connected between the ground terminal of the first interface and the ground terminal of the second interface, and also includes:

[0005] A detection resistor R1 is provided on the reference line, and a first end of the detection resistor R1 is connected to a ground end;

[0006] A main control circuit, used for detecting a first voltage and determining a direction of a charging current according to the first voltage;

[0007] A voltage divider circuit, wherein the first output end of the voltage divider circuit is connected to the second end of the detection resistor R1, the second output end of the voltage divider circuit is connected to the voltage detection port of the main control circuit, the input end of the voltage divider circuit is connected to the reference voltage, and the voltage divider circuit is used to convert the first voltage into the second voltage.

[0008] Furthermore, the ground terminal is a ground port MCU_GND of the main control circuit.

[0009] Furthermore, it also includes a power supply circuit, the output end of which is respectively connected to the power supply end of the main control circuit and the power supply end of the voltage divider circuit, and the power supply circuit is used to process the voltage input by the first interface or the second interface, and output the processed voltage to the main control circuit and the voltage divider circuit.

[0010] Further, the voltage-dividing circuit includes a first voltage-dividing resistor R2 and a second voltage-dividing resistor R7, one end of the first voltage-dividing resistor R2 is connected to the output end of the power supply circuit, the other end of the first voltage-dividing resistor R2 is connected to one end of the second voltage-dividing resistor R7 and the voltage detection port of the main control circuit, and the other end of the second voltage-dividing resistor R7 is connected to the second end of the detection resistor R1 and the ground terminal of the second interface.

[0011] Furthermore, it also includes a display circuit, which is connected to the main control circuit and is used to display the charging current direction and charging status.

[0012] Optionally, a connecting cable is provided between the first interface and the second interface, the power line and the reference line are provided in the connecting cable, the display circuit is provided on the first interface, the second interface or the connecting cable, and the control unit is provided on the first interface, the second interface or the connecting cable.

[0013] Furthermore, the first interface and the second interface are USB connectors.

[0014] Optionally, the first interface and the second interface have the same structure and are both USB connectors of Type-C specification.

[0015] Optionally, the first interface and the second interface are magnetic interfaces, plug interfaces, or wireless charging interfaces.

[0016] The embodiment of the present invention realizes the positive and negative current detection function by setting a detection resistor R1 in the reference line and using a main control circuit to detect the voltage of the non-grounded end of the detection resistor R1. Compared with the prior art, the embodiment of the present invention adopts a single detection resistor design, which effectively avoids the problem of increased internal resistance caused by the existing multiple detection resistors and improves the charging efficiency.

[0017] Secondly, the complex op amp detection circuit is eliminated, which significantly simplifies the circuit design and reduces production costs. At the same time, it reduces the increase in power consumption caused by circuit complexity. At the same time, in the fast charging high-voltage scenario, it reduces the risk of heat accumulation and improves the safety and stability of the charging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a structural block diagram of a first embodiment of the present invention;

[0020] Figure 2 is a structural block diagram of a second embodiment of the present invention;

[0021] Figure 3 is a circuit diagram of the main control circuit of the present invention;

[0022] Figure 4 is a circuit diagram of a voltage divider circuit of the present invention;

[0023] Figure 5 is a circuit diagram of a power supply circuit of the present invention;

[0024] Figure 6 is a circuit diagram of a first display unit of the present invention;

[0025] Figure 7 is a circuit diagram of the second display unit of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] First embodiment:

[0031] Reference Figure 1 , an embodiment of the present invention provides a bidirectional charging detection cable, including a charging circuit, the charging circuit including a first interface 10, a second interface 20, a power line and a reference line, the charging circuit can realize reverse charging from the first interface 10 to the second interface 20, and forward charging from the second interface 20 to the first interface 10, the power line is connected between the power terminal of the first interface 10 and the power terminal of the second interface 20, the reference line is connected between the ground terminal of the first interface 10 and the ground terminal of the second interface 20, wherein the bidirectional charging detection cable also includes:

[0032] A detection resistor R1 is provided on the reference line, and a first end of the detection resistor R1 is connected to a ground end;

[0033] The detection resistor R1 is disposed on the reference line, including being connected in series with the middle of the reference line, the end of the reference line, or other equivalent methods of being connected together with the reference line to the charging circuit.

[0034] Furthermore, the bidirectional charging detection cable also includes a main control circuit 100, a voltage detection port of which is connected to the second end of the detection resistor R1, and is used to detect a first voltage at the second end of the detection resistor R1.

[0035] Furthermore, the bidirectional charging detection cable also includes a voltage divider circuit 200, a first output end of the voltage divider circuit 200 is connected to the second end of the detection resistor R1, a second output end of the voltage divider circuit 200 is connected to the voltage detection port of the main control circuit 100, an input end of the voltage divider circuit 200 is connected to a reference voltage, and the voltage divider circuit 200 is used to convert a first voltage into a second voltage.

[0036] Among them, the bidirectional charging detection wire in this embodiment can be used as an extension cord of the charging cable, can also be used with a special adapter to provide charging function for related equipment, and can also be directly used as a charging medium connecting two electronic devices. The charged device can be an electronic device such as a handheld terminal, or an energy storage device such as a power bank; the power supply equipment can be an electronic product such as a power bank, a power adapter or a handheld terminal.

[0037] When current flows between the first interface 10 and the second interface 20, the current passes through the detection resistor R1 and generates a voltage difference at both ends thereof. When the charging is reverse charging, that is, when the first interface 10 charges the second interface 20, the voltage at the second end of the detection resistor R1 is positive; when it is forward charging, that is, when the second interface 20 charges the first interface 10, the voltage at the second end of the detection resistor R1 is negative.

[0038] Among them, the resistance value of the detection resistor R1 is designed to be a smaller value to reduce the internal resistance of the loop and power consumption. However, due to the small resistance value, the first voltage generated at its two ends is low, close to the lower limit of the resolution of the existing main control circuit 100. Direct detection of its polarity is easily affected by noise interference or insufficient accuracy, which in turn affects the reliability of the detection. Therefore, this embodiment converts the first voltage into a second voltage that is adapted to the input range of the main control circuit 100 by setting a voltage divider circuit 200, thereby effectively improving the signal quality and anti-interference ability, and ensuring that the main control circuit 100 can accurately detect and process the charging current signal.

[0039] Furthermore, the design of the ground terminal as the ground port MCU_GND of the main control circuit 100 can eliminate the influence of the reference line potential difference, ensure the stability and consistency of the detection voltage signal, thereby simplifying the subsequent calculation process of the charging current and the discharging current, and improving the accuracy and efficiency of the calculation. For the specific charging current and discharging current calculation process, please refer to the third embodiment, which will not be repeated in this embodiment.

[0040] At the same time, the ground terminal is set as the ground port MCU_GND of the main control circuit 100, avoiding additional ground connection or independent signal loop, reducing the complexity of the wire structure, reducing material and manufacturing costs, and improving the reliability and integration of the overall system.

[0041] The first interface 10 and the second interface 20 are USB connectors.

[0042] Specifically, the first interface 10 and the second interface 20 have the same structure and are both Type-C USB connectors. Charging, discharging and data interaction are achieved through Type-C USB connectors at both ends, which have wide applicability and are in line with the future standardization development direction.

[0043] Furthermore, the first interface 10 and the second interface 20 may also be magnetic interfaces, plug-in interfaces or wireless charging interfaces to adapt to usage requirements in different scenarios and enhance the compatibility and versatility of the product.

[0044] Second embodiment:

[0045] Reference Figure 1 The present invention provides another bidirectional charging detection cable, wherein the bidirectional charging detection cable also includes a power supply circuit 300, the output end of the power supply circuit 300 is respectively connected to the power supply end of the main control circuit 100 and the power supply end of the voltage divider circuit 200, and the power supply circuit 300 is used to process the voltage input from the first interface 10 or the second interface 20, and output the processed voltage to the main control circuit 100 and the voltage divider circuit 200.

[0046] Among them, in order to ensure the normal operation of the main control circuit 100, it is necessary to provide it with a stable working voltage. When the first interface 10 or the second interface 20 inputs voltage, the power supply circuit 300 receives the input voltage and performs voltage reduction, filtering and voltage stabilization through the internal voltage regulation module to eliminate fluctuations or interference in the input voltage. On the one hand, the processed stable voltage is output to the main control circuit 100 through the power supply end to ensure that it can continue to work; on the other hand, the necessary reference voltage is provided to the voltage divider circuit 200 through another power supply end to ensure the normal operation of the voltage divider circuit 200. The voltage divider circuit 200 needs to convert the first voltage generated at both ends of the detection resistor R1 into a second voltage to adapt to the optimal input range of the voltage detection port of the main control circuit 100.

[0047] Reference Figure 5 Specifically, the power supply circuit 300 includes a resistor R9, a capacitor C3, a capacitor C4, a capacitor C5, and a step-down unit U2, one end of the resistor R9 is connected to the power line, the other end of the resistor R9 is connected to one end of the capacitor C3 and the first port and the third port of the step-down unit U2, the fifth port of the step-down unit U2 is connected to one end of the capacitor C4, one end of the capacitor C5 and the output end of the power supply circuit 300, the second port of the step-down unit U2, the other end of the capacitor C3, the other end of the capacitor C4, and the other end of the capacitor C5 are grounded; the input voltage of the power line enters the first port of the step-down unit U2 after being current limited by the resistor R9, and is filtered by the capacitor C3 to suppress the high-frequency noise of the input voltage. The step-down unit U2 starts the voltage stabilization function according to the control signal of the third port, reduces the input voltage to the required stable output voltage, and outputs it to the fifth port, and the output voltage is further filtered by the capacitor C4 and the capacitor C5 to improve the stability and anti-interference ability of the output voltage.

[0048] Among them, the first port of the buck unit U2 is the power input pin, which is used to connect the input voltage to be stabilized; the second port is the ground pin, which serves as the reference point of the circuit; the third port is the enable pin, which is used to control the activation or shutdown of the buck unit U2; the fifth port is the voltage stabilization output pin, which provides a stable output voltage.

[0049] It should be noted that the buck unit U2 in this embodiment is an LDO chip, and may also be other chips with the same or similar functions, and the power supply circuit 300 in this embodiment is a conventional setting of the prior art, which can be easily made by those skilled in the art from the drawings and the above contents of the specification, so it will not be elaborated.

[0050] Reference Figure 4Specifically, the voltage-dividing circuit 200 includes a first voltage-dividing resistor R2 and a second voltage-dividing resistor R7, one end of the first voltage-dividing resistor R2 is connected to the output end of the power supply circuit 300, the other end of the first voltage-dividing resistor R2 is connected to one end of the second voltage-dividing resistor R7 and the voltage detection port of the main control circuit 100, and the other end of the second voltage-dividing resistor R7 is connected to the second end of the detection resistor R1 and the ground terminal of the second interface 20.

[0051] Reference Figure 3 Specifically, the main control circuit 100 includes a main control unit U1 and a capacitor C1, the second end of the main control unit U1 is a ground end, the third end and the fourth end of the main control unit U1 are signal control ends of the display circuit 400, the fifth end VDD of the main control unit U1 is a power supply end, the sixth end AD1 of the main control unit U1 is a voltage detection port, the output end of the power supply circuit 300 is connected to one end of the capacitor C1 and the fifth end of the main control unit U1, the other end of the capacitor C1 is grounded, and the sixth end of the main control unit U1 is connected between the first voltage-dividing resistor R2 and the second voltage-dividing resistor R7, for collecting the second voltage output by the voltage-dividing circuit 200.

[0052] Among them, the second voltage is the first voltage generated at both ends of the detection resistor R1, which is output to the main control circuit 100 after being divided by the first voltage-dividing resistor R2 and the second voltage-dividing resistor R7. Since the voltage-dividing principle itself is a linear distribution, as long as the first voltage increases or decreases with the charging current, the second voltage will rise and fall accordingly at the same ratio, so that the main control circuit 100 can stably and accurately collect current information and further determine the current direction and magnitude; specifically, when the charging current is 0, the second voltage will output a reference voltage value, which is determined by the resistance ratio of the voltage-dividing resistors R2 and R7. Fixed, represents the reference voltage in the static state. When there is a forward charging current, the first voltage is a negative value, and the second voltage will decrease relative to the reference value due to the voltage division effect of the first voltage, and gradually decrease as the current increases; on the contrary, when there is a reverse charging current, the first voltage is a positive value, and the second voltage will increase relative to the reference value due to the voltage division effect of the first voltage, and gradually increase as the current increases. Through this voltage division linear mapping relationship, the main control circuit 100 can stably obtain the change information of the second voltage, thereby accurately judging the direction and magnitude of the current, and realizing accurate current detection and control functions.

[0053] Third embodiment:

[0054] Reference Figure 2 The present invention provides another bidirectional charging detection cable, which also includes a display circuit 400. The display circuit 400 is connected to the main control circuit 100 and is used to display the charging current direction and charging status.

[0055] Furthermore, a connecting cable is provided between the first interface 10 and the second interface 20, the power line and the reference line are arranged in the connecting cable, the display circuit 400 is arranged on the first interface 10, the second interface 20 or the connecting cable, and the control unit is arranged on the first interface 10, the second interface 20 or the connecting cable.

[0056] Specifically, a wire for connecting the signal end of the first interface 10 and the signal end of the second interface 20 may be further provided in the connection cable, so that the bidirectional charging cable structure in this embodiment has a signal transmission function.

[0057] In this embodiment, the display circuit 400 also includes a first display unit 410 and a second display unit 420, which are respectively located on the first interface 10 and the second interface 20. The first display unit 410 and the second display unit 420 can be display screens, digital displays, LED lights, LED light groups, LED panels, etc.

[0058] Reference Figure 6 The first display unit 410 includes a resistor R21, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a switch tube Q1, a first LED light group LED1 and a second LED light group LED2. The power line is connected to the collector of the switch tube Q1. The base of the switch tube Q1 is connected to the fourth end of the main control unit U1 through the resistor R21. The emitter of the switch tube Q1 is grounded through the resistor R4 and the white LED in the first LED light group LED1, and is grounded through the resistor R6 and the white LED in the second LED light group LED2. The third end of the main control unit U1 is grounded through the resistor R3 and the red LED in the first LED light group LED1, and is grounded through the resistor R5 and the red LED in the second LED light group LED2.

[0059] Reference Figure 7 The second display unit 420 includes a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a switch tube Q2, a switch tube Q3, a third LED lamp group LED3 and a fourth LED lamp group LED4. The power line is connected to the collector of the switch tube Q2, the base of the switch tube Q2 is connected to the third end of the main control unit U1 through the resistor R10, the emitter of the switch tube Q2 is grounded through the resistor R12 and the red LED in the third LED lamp group LED3, and is grounded through the resistor R14 and the red LED in the fourth LED lamp group LED4; the power line is connected to the collector of the switch tube Q3, the base of the switch tube Q3 is connected to the fourth end of the main control unit U1 through the resistor R11, the emitter of the switch tube Q3 is grounded through the resistor R13 and the white LED in the third LED lamp group LED3, and is grounded through the resistor R15 and the white LED in the fourth LED lamp group LED4.

[0060] Among them, the switch tube Q1 , the switch tube Q2 and the switch tube Q3 are triodes.

[0061] When charging in the forward direction, the second display unit 420 provided at the second interface 20 starts to work, and when charging in the reverse direction, the first display unit 410 provided at the first interface 10 starts to work.

[0062] Specifically, in the initial stage after the device is powered on, the first display unit 410 or the second display unit 420 displays red for 3 seconds, indicating that a charging operation is currently in progress. The main control circuit 100 determines the charging status by detecting the charging current. When the charging current is greater than 400mA, the indicator light remains red, indicating that charging is in progress; when the charging current drops below 300mA, it switches to white, indicating that it is fully charged; when the indicator light displays white, if the device is not disconnected, even if the current increases due to device operation, it will not switch back to red to meet the user's usage habits.

[0063] Specifically, when the charging indicator light is red, if the charging current is detected to be greater than 1A, it indicates that the device supports the fast charging function. The main control circuit 100 sets the fast charging flag to 1 and starts timing. If the charging current does not drop below 300mA within two hours, the indicator light is forced to switch to white to prompt the user that charging is complete. This mechanism takes into account that when the device is charged and used at the same time, although the battery is fully charged, the current may not drop to 300mA due to the operating requirements of the device, thereby avoiding prompt delays caused by the current maintaining a high value.

[0064] Specifically, the main control circuit 100 records the maximum charging current value during the charging process and detects the current change trend. When the fast charging mark is triggered, if the charging current drops by more than 500mA from the maximum value, the fast charging full state is determined, the fast charging full mark is triggered and the timing starts; within the subsequent 30 minutes, if the charging current remains stable and does not rebound, the indicator light is switched to white, indicating that charging is complete.

[0065] Specifically, when the charging indicator light is red, if the fast charging sign is triggered and the charging current drops and stabilizes within the range of 300-700mA and lasts for more than 10 minutes, the indicator light switches to white, indicating that the device is fully charged. This mechanism is designed for scenarios where the device is connected to a charger when the battery is close to full and is used while charging. It can quickly and accurately indicate the charging completion status.

[0066] Furthermore, when the current flows from the first interface 10 to the second interface 20, assuming that the energy-consuming devices inside the bidirectional charging detection cable are all connected to the first interface 10 side, since the detection resistor R1 is set on the reference line and the grounding of these devices is also on the first interface 10 side, the current consumption of the cable itself will not pass through the detection resistor R1. At this time, the current measured by the detection resistor can basically be used as the actual current for charging or discharging the external device, and there is no need to deduct the current consumption of the cable itself. The corresponding current value can be obtained by directly reading the voltage difference across the detection resistor R1 and combining it with the known resistance value. The current value can be directly regarded as the external output or input current.

[0067] When the current flows from the second interface 20 to the first interface 10, the detection resistor R1 will simultaneously detect the current flowing back from the external load and the current consumed by the components inside the bidirectional charging detection cable. Because the working current of the energy-consuming devices inside the bidirectional charging detection cable in this direction will also flow through the detection resistor R1, the detection resistor obtains the total current after superposition. If it is necessary to obtain the actual charging or discharging current for the external device, the current consumption of the cable itself must be deducted from the total current detected. The current consumption of the cable itself can be measured and recorded in advance by no-load or other means. By comparing this reference value with the "total current", a more accurate external charging or discharging current can be obtained.

[0068] The above is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A bidirectional charging detection cable, comprising a charging circuit, the charging circuit comprising a first interface, a second interface, a power line and a reference line, the charging circuit can realize reverse charging from the first interface to the second interface, and forward charging from the second interface to the first interface, the power line is connected between the power terminal of the first interface and the power terminal of the second interface, the reference line is connected between the ground terminal of the first interface and the ground terminal of the second interface, characterized in that: Also includes: A detection resistor R1 is provided on the reference line, and a first end of the detection resistor R1 is connected to a ground end; A main control circuit, used for detecting a first voltage and determining a direction of a charging current according to the first voltage; A voltage divider circuit, wherein the first output end of the voltage divider circuit is connected to the second end of the detection resistor R1, the second output end of the voltage divider circuit is connected to the voltage detection port of the main control circuit, the input end of the voltage divider circuit is connected to the reference voltage, and the voltage divider circuit is used to convert the first voltage into the second voltage.

2. A bidirectional charging detection wire according to claim 1, characterized in that: The ground terminal is a ground port MCU_GND of the main control circuit.

3. A bidirectional charging detection wire according to claim 1 or 2, characterized in that: It also includes a power supply circuit, the output end of which is respectively connected to the power supply end of the main control circuit and the power supply end of the voltage divider circuit. The power supply circuit is used to process the voltage input from the first interface or the second interface, and output the processed voltage to the main control circuit and the voltage divider circuit.

4. A bidirectional charging detection wire according to claim 3, characterized in that: The voltage-dividing circuit includes a first voltage-dividing resistor R2 and a second voltage-dividing resistor R7, one end of the first voltage-dividing resistor R2 is connected to the output end of the power supply circuit, the other end of the first voltage-dividing resistor R2 is connected to one end of the second voltage-dividing resistor R7 and the voltage detection port of the main control circuit, and the other end of the second voltage-dividing resistor R7 is connected to the second end of the detection resistor R1 and the ground terminal of the second interface.

5. A bidirectional charging detection wire according to claim 1, characterized in that: It also includes a display circuit, which is connected to the main control circuit and is used to display the charging current direction and charging status.

6. A bidirectional charging detection wire according to claim 5, characterized in that: A connecting cable is also provided between the first interface and the second interface, the power line and the reference line are provided in the connecting cable, the display circuit is provided on the first interface, the second interface or the connecting cable, and the control unit is provided on the first interface, the second interface or the connecting cable.

7. A bidirectional charging detection wire according to claim 1, characterized in that: The first interface and the second interface are USB connectors.

8. A bidirectional charging detection wire according to claim 7, characterized in that: The first interface and the second interface have the same structure and are both USB connectors of Type-C specification.

9. A bidirectional charging detection wire according to claim 1, characterized in that: The first interface and the second interface are magnetic interfaces, plug interfaces, or wireless charging interfaces.

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