Cable, power supply device, and power receiving device

Abstract

The application provides a cable, a power supply device and a powered device. The cable can be provided with an indication structure, which can be used to realize the connection of the cable with the power supply device or the powered device, and can also be used to trigger an indication signal indicating that the cable is about to be separated from the device or has been separated from the device. The power supply device and the powered device can both acquire the indication signal, and perform operations such as closing the power supply output of the power supply device, sending prompt information to the user, etc. according to the indication signal, so as to reduce the probability of safety events such as sparking during hot plug and improve the power safety of the device.

Description

[0001] This application claims priority to Chinese Patent Application No. 202410399079.3, filed on April 1, 2024, entitled “Charging Method and Electronic Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of terminal equipment hardware, specifically to a cable, a power supply device, and a power receiving device. Background Technology

[0003] Consumer electronics typically require plug-and-play functionality. Directly plugging and unplugging while powered on can cause arcing or other problems at the charging or power supply ports, leading to port damage. With the rapid development of product types and functions, power consumption has reached hundreds of watts or even higher. For these high-power products, the phenomenon of direct plugging and unplugging causing damage to the power or charging ports is even more common.

[0004] Improving the electrical safety of consumer products and reducing the likelihood of safety incidents during cable plugging and unplugging is a problem worth considering. Summary of the Invention

[0005] This application provides a cable, a power supply device, and a power receiving device. The cable may be provided with an indicator structure. In a hot-plug scenario, the indicator structure can trigger a signal indicating that the cable is about to be separated from the power supply device or the power receiving ...

[0006] In a first aspect, a cable is provided, comprising: an indicator structure, a first signal line, a second signal line, and a first cable tag chip, wherein the first signal line is electrically connected to a first contact and a second contact located at both ends of the cable; the second signal line is electrically connected to a third contact of the cable and the first cable tag chip; the indicator structure is used to connect a target device to the cable, and the indicator structure is also used to trigger a connection signal and / or a separation signal, wherein the connection signal is used to indicate that the cable is connected to the target device, and the separation signal is used to indicate that the cable is separated from the target device.

[0007] In some scenarios, the first contact, the second contact, and the third contact can all be pins at the connection points between the cable and the device.

[0008] In one possible implementation, the indicator structure can be used to achieve a fixed connection between the cable and the target device. In some scenarios, the target device may be equipped with a cable interface, and the connection between the cable and the target device can also be understood as the connection between the cable and the cable interface of the target device.

[0009] In the above scheme, the indicator component triggering the connection signal can mean that the indicator component can trigger the connection signal during the process of the cable and the target device transitioning from an unconnected state to a connected state. The indicator component triggering the separation signal can mean that the indicator component can trigger the separation signal during the process of the cable and the target device transitioning from a connected state to an unconnected state.

[0010] In one possible implementation, the connection signal or disconnection signal may include the voltage level at the same location on the line within the target device and the voltage level change value. For example, if the voltage level at the contact point of the cable interface of the target device reaches a first preset range and the voltage level change meets a first preset requirement, it can be considered a connection signal; if the voltage level at the contact point of the cable interface of the target device reaches a second preset range and the voltage level change meets a second preset requirement, it can be considered a disconnection signal.

[0011] It should be understood that the names of the indicated structural components are merely exemplary, and the structural components may have other names, which are not limited in this application.

[0012] In one possible implementation, the cable also includes a voltage bus, which can be one or more.

[0013] In one possible implementation, the target device can be a power supply device or a power receiving device.

[0014] By setting an indicator structure on the cable, when the cable is connected to the power supply or power receiving equipment, the indicator structure can trigger the aforementioned separation signal in response to the user's operation of unplugging the cable. Before the cable is actually unplugged from the equipment, the power supply or power receiving equipment can take corresponding protective measures by detecting the separation signal to prevent safety events such as arcing during the cable unplugging process, which is beneficial to improving the electrical safety of the equipment.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the indicating structure includes a first fastener and a second fastener, the first fastener and the second fastener being electrically connected, both the first fastener and the second fastener being used to connect the cable to the target device, the indicating structure triggering a connection signal when both the first fastener and the second fastener are in a connected state; and the indicating structure triggering a separation signal when the first fastener and / or the second fastener are in a disconnected state.

[0016] In one possible implementation, the interface between the target device and the cable may be provided with a first mating part that mates with a first fastener and a second mating part that mates with a second fastener. For example, both the first and second fasteners can be conductive through-holes located at one end of the cable; correspondingly, the first and second mating parts can also be conductive through-holes.

[0017] In the above technical solution, the first fastener being in a connected state can be understood as the first fastener being electrically connected to the first mating part of the target device; for example, the first fastener and the first mating part are in contact with each other. The second fastener being in a connected state can also be understood in a similar sense. Taking the first fastener and the first mating part as both being conductive holes as an example, the first fastener being in a connected state can mean that the two conductive holes are in contact with each other and electrically connected, or it can mean that the two conductive holes are connected through a metal screw.

[0018] Here, both the first fastener and the second fastener are in a connected state, which can mean that the cable and the target device have been fixedly connected by the aforementioned fasteners, or it can mean that the cable and the target device are about to be fixedly connected by the aforementioned fasteners.

[0019] In one possible implementation, both ends of the cable may be equipped with sliding locks or rotary locks. When the cable is connected to the target device, the sliding lock at the cable end must be slid to the target position or the rotary lock rotated to the target position to unlock it before the cable can be pulled out of the target device's cable interface. The aforementioned first and second fasteners can be two electrically connected fastening structures, such as protrusions and / or grooves, located within the sliding lock or rotary lock. The cable interface of the target device can correspondingly have grooves and / or protrusions. When the protrusion in the sliding lock or rotary lock is engaged in the groove of the target device, and / or when the protrusion of the target device is engaged in the groove of the sliding lock or rotary lock, the sliding lock or rotary lock is locked; otherwise, it is unlocked.

[0020] In one possible implementation, cable sleeves can be provided at both ends of the cable. Magnetic spring contacts can be provided on the end faces of the cable sleeves. These magnetic spring contacts can engage with the cable interface of the target device. When the cable is connected to the target device, the magnetic attraction between the magnetic spring contacts and the cable interface of the target device must be broken before the cable can be pulled out of the interface. There can be two magnetic spring contacts on the end faces of the cable sleeves, and these two spring contacts are electrically connected. In this structure, the two magnetic spring contacts can be considered as the first and second fasteners in the above solution.

[0021] In this technical solution, the indicator structure can trigger a connection signal when both fasteners are connected, and a separation signal can be triggered when either fastener is disconnected. In hot-swappable scenarios, if either fastener used to connect the cable and the target device becomes loose, a separation signal may be triggered. This cable is highly sensitive to safety events, which helps improve the electrical safety of the equipment.

[0022] In conjunction with the first aspect, in some implementations of the first aspect, the indicator structure is used to control the electrical connection or disconnection of the first signal line and the second signal line, and when the first signal line and the second signal line are electrically connected, the indicator structure triggers a disconnection signal.

[0023] In one possible implementation, when the cable is connected to the target device, the first signal line and the second signal line can be electrically connected to two contacts of the target device, respectively. The control of the electrical connection or disconnection of the first signal line and the second signal line by the indicator structure can also be understood as the control of the connection or disconnection of the two contacts electrically connected to the first signal line and the second signal line, respectively.

[0024] The aforementioned separation signal can also be understood as a signal indicating a change in the level and / or a level value indication within the target device caused by the electrical connection between the first signal line and the second signal line.

[0025] In this technical solution, the separation signal is triggered by shorting the first signal line and the second signal line. The internal structure of the cable is relatively simple, which is beneficial to improving the applicability of the cable in different scenarios and to realizing the hot-plug protection function of the cable.

[0026] In conjunction with the first aspect, in some implementations of the first aspect, the indicator structure includes a first structure, wherein when the first structure is in a first state, the first signal line is electrically connected to the second signal line.

[0027] In one possible implementation, the first structural component can be a pressing piece, and when the pressing piece is pressed, the first signal line and the second signal line are electrically connected.

[0028] In conjunction with the first aspect, in some implementations of the first aspect, the indicator structure further includes a latch for connecting the cable to the target device, which unlocks when the first structure is in the first state.

[0029] The first structural component in the indicator structure provided by this technical solution can be used to realize the electrical connection between the first signal line and the second signal line. The buckle in the indicator structure can be used to realize the physical connection between the cable and the target device. The user can act (e.g., push, press, etc.) on the first structural component to trigger a separation signal while unlocking the physical connection between the cable and the target device, thereby enabling the target device to take safety measures to prevent safety events from occurring during the hot plugging and unplugging of the cable.

[0030] In conjunction with the first aspect, in some implementations of the first aspect, the indicator structure includes a fastener for connecting the cable to the target device, and the fastener also for triggering a separation signal. When the fastener is in a disconnected state, the first signal line is electrically connected to the second signal line; when the fastener is in a connected state, the first signal line is electrically disconnected from the second signal line.

[0031] In one possible implementation, the fastener can be a screw, bolt, pin, etc., the target device can be provided with a hole for accommodating the fastener, and the target device can also be provided with a circuit for generating a separation signal.

[0032] In some scenarios, when the fastener is in a loose state, the first signal line and the second signal line are electrically connected; when the fastener is in a tightened state, the first signal line and the second signal line are electrically disconnected. In this scenario, the loose state of the fastener can be understood as a non-connected state in this solution, and the tightened state of the fastener can be understood as a connected state in this solution.

[0033] In some scenarios, when the fastener is not fully tightened, the first and second signal lines can be electrically connected or electrically connected at the port. Taking fasteners such as screws as an example, when one-third of the screw length is inserted into the hole of the target device, the first and second signal lines are electrically connected; when two-thirds of the screw length is inserted into the hole of the target device, the first and second signal lines can be electrically disconnected.

[0034] In one possible implementation, a fastener being in a connected state can refer to a state in which the fastener interacts with the electronic components in the separation signal generation circuit of the aforementioned target device. For example, if a conductive spring is provided in the target device, and the fastener lifts one or both ends of the conductive spring, this can be considered a connected state of the fastener. A fastener being in a disconnected state can refer to a state in which the fastener does not interact with the electronic components in the separation signal generation circuit of the aforementioned target device. For example, if a conductive spring is provided in the target device, and the fastener is not in contact with the conductive spring, or is in contact with the conductive spring but does not lift it, this can both be considered a disconnected state of the fastener.

[0035] Based on the above understanding of the connection and non-connection states of fasteners, when the cable is connected to the target device, the fastener can be in a connected state; when the cable is not connected to the target device, the fastener can be in a non-connection state.

[0036] In one possible implementation, the number of fasteners can be one or more.

[0037] In this technical solution, fasteners are used to trigger the separation signal and connect the cable to the device. The cable structure is relatively simple, which is conducive to the widespread use of the cable.

[0038] In conjunction with the first aspect, in some implementations of the first aspect, the cable also includes a third signal line and a second cable tag chip, the third signal line connecting the fourth contact of the cable and the second cable tag chip, the fourth contact and the third contact being located at both ends of the cable.

[0039] In some scenarios, the above solution can also be understood as the two ends of the cable being symmetrically arranged, or in other words, when either end of the cable is connected to the target device, a connection signal and / or a disconnection signal can be triggered during hot-plugging. This is beneficial to enhance the safety of the cable, improve the convenience of cable use, and enhance the user experience.

[0040] In a second aspect, a power supply device is provided, comprising: a first contact, a second contact, a first power supply, a second power supply, and a processing unit, wherein the first contact is electrically connected to the first power supply; the second contact is electrically connected to either the first power supply or the second power supply; and the processing unit is configured to: detect a first signal, wherein the first signal is configured to indicate that a cable is disconnected from the power supply device.

[0041] In one possible implementation, the power supply device further includes a pull-up resistor connected between the first contact and the first power source.

[0042] In one possible implementation, the processing unit is also configured to: reduce or shut down the power output of the power supply device in response to detecting the first signal.

[0043] Here, the first signal indicates that the cable is about to separate from the power supply equipment. This should be understood as either the cable and power supply equipment being in a state of imminent separation, or the cable and power supply equipment already being separated. In some scenarios, the first signal can be understood as the aforementioned separation signal.

[0044] In this technical solution, the power supply equipment can detect the indication signal indicating whether the cable is separated from the power supply equipment through the processing unit. In this way, before the cable is actually pulled out of the interface on the power supply equipment, the power supply equipment can take protective measures to reduce or shut down the power output, so as to reduce the probability of safety incidents caused by hot plugging.

[0045] In conjunction with the second aspect, in some implementations of the second aspect, the power supply equipment further includes a third power source, a first conductive component, and a second conductive component. The first conductive component is electrically connected to the third power source, and the second conductive component is grounded. When the cable is connected to the power supply equipment, the first conductive component is electrically connected to the second conductive component. When the cable is disconnected from the power supply equipment, the first conductive component is disconnected from the second conductive component. The processing unit is specifically used to detect whether the first conductive component is electrically connected to the second conductive component.

[0046] In one possible implementation, the third power source and the aforementioned first power source can be the same power source.

[0047] In one possible implementation, the first conductive component and the second conductive component can be two conductive holes opened near the interface between the power supply equipment and the cable. When the cable is connected to the power supply equipment, the two conductive holes can conduct electricity, and when the cable is separated from the power supply equipment, the two conductive holes can disconnect the electrical connection.

[0048] When the first conductive component and the second conductive component are electrically connected, the voltage level on the connection line between the two conductive components will change. The processing unit in the power supply equipment can detect the voltage level and / or the change in voltage level on the connection line to determine whether a connection signal is generated. Correspondingly, when the first conductive component and the second conductive component are disconnected, the voltage level on the connection line between the two conductive components will also change. The processing unit in the power supply equipment can detect the voltage level and / or the change in voltage level on the connection line to determine whether a separation signal is generated.

[0049] The power supply equipment can be equipped with electronic components and corresponding connection lines for generating separation and connection signals. A connection event between the cable and the power supply equipment can trigger these electronic components to generate a connection signal, and a separation event between the cable and the power supply equipment can trigger these electronic components to generate a separation signal. In this way, the connection or separation status of the cable and the power supply equipment can be reflected by circuit signals. When the aforementioned first signal is detected, the power supply equipment can implement protective measures such as reducing the power transmission power, thereby improving the power safety of the power supply equipment.

[0050] In conjunction with the second aspect, in some implementations of the second aspect, the processing unit is specifically used to: detect whether the first contact is electrically connected to the second contact.

[0051] In one possible implementation, when the cable is connected to a power supply device, the first contact and the second contact can be electrically connected to two different signal lines within the cable, respectively. Here, the electrical connection between the first contact and the second contact can also be understood as the electrical connection between two different signal lines within the cable.

[0052] In one possible implementation, the first contact can be at a low level and the second contact can be at a high level. When the first contact and the second contact are electrically connected, the level of the first contact increases. The processing unit can determine whether the first contact and the second contact are electrically connected by detecting the level value and / or the level change value of the first contact, and thus determine whether a first signal is generated.

[0053] In this technical solution, the connection or disconnection status between two contacts electrically connected to two signal lines of the power supply equipment and the cable is used to reflect whether a first signal is generated. The circuit for generating the first signal in the power supply equipment is relatively simple, which is conducive to improving the production efficiency of the power supply equipment and realizing the large-scale application of the power supply equipment.

[0054] In conjunction with the second aspect, in some implementations of the second aspect, the power supply equipment further includes a conductive spring, wherein when the cable is separated from the power supply equipment, the conductive spring is electrically connected to the first contact and the second contact respectively; and when the cable is connected to the power supply equipment, the conductive spring is not electrically connected to the first contact and / or the second contact.

[0055] In one possible implementation, when the cable is connected to the power supply equipment, neither end of the conductive spring is electrically connected to the first or second contact.

[0056] In one possible implementation, when the cable is connected to the power supply equipment, one end of the conductive spring is not electrically connected to the first or second contact.

[0057] In this technical solution, a dedicated conductive spring is set in the power supply equipment. The circuit for triggering the first signal is relatively reliable, which helps to improve the stability of the connection between the power supply equipment and the cable in hot-swapping scenarios, preventing safety events such as arcing, and thus improving the electrical safety of the power supply equipment.

[0058] In conjunction with the second aspect, in some implementations of the second aspect, the power supply equipment further includes a single-pole double-throw switch, the common terminal of which is electrically connected to the second contact, and the two contacts of which are electrically connected to the first power supply and the second power supply, respectively; the processing unit is also used to: control the single-pole double-throw switch to electrically connect the second contact to the first power supply or the second power supply.

[0059] Using a single-pole double-throw switch can simplify the wiring within power supply equipment, allowing a single switch to control two lines, which helps improve the control efficiency of the power supply equipment.

[0060] Thirdly, a power receiving device is provided, comprising: a first contact, a second contact, a first power supply, a second power supply, and a processing unit, wherein the first contact is grounded; the second contact is electrically connected to the first power supply or the second power supply; and the processing unit is configured to: detect a second signal, the second signal being used to indicate that a cable is disconnected from the power receiving device.

[0061] In one possible implementation, the powered device further includes a pull-down resistor connected between the first contact and the first power supply.

[0062] In one possible implementation, the processing unit is also configured to: display or play a warning message that the power supply line is about to be disconnected in response to the detection of a second signal.

[0063] Here, the second signal is used to indicate the separation of the cable from the power supply equipment. This should be understood as either the cable and the powered equipment being about to separate, or the cable and the powered equipment already being separated. In some scenarios, the second signal can be understood as the aforementioned separation signal.

[0064] In this technical solution, the receiving device can detect the indicator signal indicating whether the cable is disconnected from the receiving device through a processing unit. Thus, before the cable is actually unplugged from the interface on the receiving device, the receiving device can issue a warning message that the power supply line is about to be disconnected, reminding the user to save data, etc. The implementation of this solution helps improve the electrical safety of the receiving device.

[0065] In conjunction with the third aspect, in some implementations of the third aspect, the power receiving device further includes a third power source, a first conductive component, and a second conductive component. The first conductive component is electrically connected to the first power source, and the second conductive component is grounded. When the cable is connected to the power receiving device, the first conductive component is electrically connected to the second conductive component; when the cable is disconnected from the power receiving device, the first conductive component is disconnected from the second conductive component. The processing unit is specifically used to detect whether the first conductive component is electrically connected to the second conductive component.

[0066] In one possible implementation, the third power source and the aforementioned first power source can be the same power source.

[0067] In one possible implementation, the first conductive component and the second conductive component can be two conductive holes opened near the interface where the powered device is connected to the cable. When the cable is connected to the powered device, the two conductive holes can be conductive, and when the cable is disconnected from the powered device, the two conductive holes can disconnect the electrical connection.

[0068] When the first conductive component and the second conductive component are electrically connected, the voltage level on the connection line between the two conductive components will change. The processing unit in the powered device can detect the voltage level and / or the change in voltage level on the connection line to determine whether a connection signal is generated. Correspondingly, when the first conductive component and the second conductive component are disconnected, the voltage level on the connection line between the two conductive components will also change. The processing unit in the powered device can detect the voltage level and / or the change in voltage level on the connection line to determine whether a separation signal is generated.

[0069] The receiving device can be equipped with electronic components and corresponding connection lines for generating separation and connection signals. A connection event between the cable and the receiving device can trigger these electronic components to generate a connection signal, and a separation event between the cable and the receiving device can trigger these electronic components to generate a separation signal. In this way, the connection or separation status of the cable and the receiving device can be reflected by circuit signals. When the receiving device detects the aforementioned second signal, it can remind the user to save the data, which helps to improve the electrical safety of the receiving device.

[0070] In conjunction with the third aspect, in some implementations of the third aspect, the processing unit is specifically used to: detect whether the first contact is electrically connected to the second contact.

[0071] In one possible implementation, when the cable is connected to the powered device, the first contact and the second contact can be electrically connected to two different signal lines within the cable, respectively. Here, the electrical connection between the first contact and the second contact can also be understood as the electrical connection between two different signal lines within the cable.

[0072] In one possible implementation, the first contact can be at a low level and the second contact can be at a high level. When the first contact and the second contact are electrically connected, the level of the first contact increases. The processing unit can determine whether the first contact and the second contact are electrically connected by detecting the level value and / or the level change value of the first contact, and thus determine whether a first signal is generated.

[0073] In this technical solution, the connection or disconnection status between two contacts electrically connected to the two signal lines of the cable on the receiving device is used to reflect whether a second signal is generated. The circuit for generating the second signal on the receiving device is relatively simple, which is conducive to improving the production efficiency of the receiving device and to realizing the large-scale application of the receiving device.

[0074] In conjunction with the third aspect, in some implementations of the third aspect, the power receiving device further includes a conductive spring, which is electrically connected to the first contact and the second contact respectively when the cable is separated from the power receiving device; and the conductive spring is not electrically connected to the first contact and / or the second contact when the cable is connected to the power receiving device.

[0075] In one possible implementation, when the cable is connected to the powered device, neither end of the conductive spring is electrically connected to the first or second contact.

[0076] In one possible implementation, when the cable is connected to the powered device, one end of the conductive spring is not electrically connected to the first or second contact.

[0077] In this technical solution, a dedicated conductive spring is set in the power receiving device. The circuit for triggering the second signal is relatively reliable, which helps to improve the stability of the connection between the power receiving device and the cable in hot-plug scenarios, preventing safety events such as arcing, and thus improving the electrical safety of the power receiving device.

[0078] In conjunction with the third aspect, in some implementations of the third aspect, the power receiving equipment further includes a single-pole three-throw switch, the common terminal of which is electrically connected to the second contact, the three contacts of which are electrically connected to the first power supply, the second power supply, or ground, respectively, and the third contact of which is grounded; the processing unit is also used to: control the single-pole three-throw switch to electrically connect the second contact to the first power supply or the second power supply or ground.

[0079] This technical solution simplifies the wiring within the power supply equipment by using a single-pole three-throw switch, allowing a single switch to control multiple lines, which improves the control efficiency of the power receiving equipment.

[0080] Fourthly, a target device is provided, comprising: a power supply, an indicator structure, and a processing unit. The indicator structure is used to trigger the power supply to generate a connection signal and / or a disconnection signal. The indicator structure is also used to connect the target device to a cable. The processing unit is used to detect the connection signal and / or the disconnection signal. The connection signal is used to indicate that the target device is connected to the cable, and the disconnection signal is used to indicate that the target device is disconnected from the cable.

[0081] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the target device further includes a first contact and a second contact, both of which are used for electrical connection between the target device and the cable.

[0082] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the indicating structure includes a first fastener and a second fastener, the first fastener being electrically connected to a power source and the second fastener being grounded; the first fastener and the second fastener are used to connect the target device to the cable; when the first fastener and / or the second fastener are not in a connected state, the indicating structure triggers the power source to generate a separation signal, and when both the first fastener and the second fastener are in a connected state, the indicating structure triggers the power source to generate a connection signal.

[0083] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the aforementioned power supply includes a first power supply and a second power supply, a first contact is electrically connected to the first power supply, a second contact is electrically connected to either the first or the second power supply, an indicator structure is used to control the electrical connection or disconnection of the first and second contacts, and in the case of the first and second contacts being electrically connected, the indicator structure triggers a separation signal.

[0084] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the indicating structure includes a first structure in which, when the first structure is in a first state, the first contact and the second contact are electrically connected.

[0085] In one possible implementation, the first structural component is a pressing sheet, and when the pressing sheet is in a pressed state, the first contact and the second contact are electrically connected.

[0086] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the indicator structure also includes a latch for connecting the target device to the cable, which unlocks when the first structure is in the first state.

[0087] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the indicating structure includes a fastener for connecting the target device to the cable, and the fastener also serves to trigger a separation signal. When the fastener is in a disconnected state, the first contact and the second contact are electrically connected; when the fastener is in a connected state, the first contact and the second contact are electrically disconnected.

[0088] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the target device is a power supply device or a power receiving device, wherein the power supply device further includes a power output module and the power receiving device further includes a power input module.

[0089] In this technical solution, the target device can be equipped with an indicator structure for realizing the physical connection between the cable and the device. The indicator structure can also trigger connection signals and / or disconnection signals. The target device can be widely applied to existing cables.

[0090] Fifthly, a power transmission system is provided, comprising: a cable as described in the first aspect and any possible implementation thereof, a power supply device as described in the second aspect and any possible implementation thereof, and a power receiving device as described in the third aspect and any possible implementation thereof.

[0091] In one possible implementation, the cable may include a first signal line, a second signal line, and a third signal line. The cable interface of the power supply device may include two contacts, and the cable interface of the power receiving device may include two contacts. One end of the first signal line and one end of the second signal line of the cable may be connected to the two contacts of the power supply device, respectively. The other end of the first signal line and one end of the third signal line of the cable may be electrically connected to the two contacts of the power receiving device, respectively.

[0092] In a sixth aspect, a method for transmitting electrical energy is provided, applied to a power supply device in the second aspect and any possible implementation thereof, the method comprising: detecting a first signal for indicating that a cable is disconnected from the power supply device; and, in response to the first signal, reducing or shutting off the power output of the cable interface.

[0093] By detecting the first signal, the power supply equipment can reduce or shut down the power output of the cable interface before the cable is disconnected from the power supply equipment. The implementation of this technical solution is conducive to improving the power safety of the power supply equipment and helping to avoid the occurrence of safety incidents.

[0094] A seventh aspect provides a method for transmitting electrical energy, applied to a powered device in the third aspect and any possible implementation thereof, the method comprising: detecting a second signal indicating that a cable is disconnected from the powered device; and displaying a prompt message in response to the second signal indicating that the power supply line is disconnected.

[0095] By detecting the second signal, the receiving device can prompt the user to take measures such as saving data before the cable is disconnected from the receiving device. The implementation of this technical solution is conducive to improving the electrical safety of the receiving device and helping to avoid the occurrence of safety incidents.

[0096] Eighthly, an apparatus for transmitting electrical energy is provided, including modules for implementing the sixth aspect and any possible implementation thereof.

[0097] A ninth aspect provides an apparatus for transmitting electrical energy, including modules for implementing the seventh aspect and any possible implementation thereof.

[0098] In a tenth aspect, a computer program product is provided, comprising computer program code that, when executed on a computer, causes the methods in the sixth aspect and any possible implementation thereof, or the methods in the seventh aspect and any possible implementation thereof, to be performed.

[0099] Eleventhly, a computer-readable storage medium is provided that stores computer program code, which, when run on a computer, causes the methods in the sixth aspect and any possible implementation thereof, or the methods in the seventh aspect and any possible implementation thereof, to be executed.

[0100] In a twelfth aspect, a chip product is provided, including a processor for reading instructions stored in a memory, wherein when the processor executes the instructions, the chip performs the method of the sixth aspect and any possible implementation thereof, or the method of the seventh aspect and any possible implementation thereof. Attached Figure Description

[0101] Figure 1 This is a schematic diagram of a power transmission system architecture provided in an embodiment of this application.

[0102] Figure 2 This is a schematic diagram of another power transmission system architecture provided in an embodiment of this application.

[0103] Figure 3 This is a schematic diagram of an electrical power transmission system provided in an embodiment of this application.

[0104] Figure 4 yes Figure 3 A schematic diagram of the power supply equipment in the power transmission system shown.

[0105] Figure 5 yes Figure 3 A schematic diagram of the receiving equipment in the power transmission system is shown.

[0106] Figure 6 yes Figure 3 A schematic diagram of cables in a power transmission system is shown.

[0107] Figure 7 yes Figure 3 The diagram shows the timing of the insertion and removal detection of power supply equipment in the power transmission system.

[0108] Figure 8 yes Figure 3 The diagram shows the timing of the insertion and removal detection of powered devices in the power transmission system.

[0109] Figure 9 This is a schematic diagram of another power transmission system provided in an embodiment of this application.

[0110] Figure 10 yes Figure 9 A schematic diagram of the power supply equipment in the power transmission system shown.

[0111] Figure 11 yes Figure 9A schematic diagram of the receiving equipment in the power transmission system is shown.

[0112] Figure 12 yes Figure 9 A schematic diagram of cables in a power transmission system is shown.

[0113] Figure 13 yes Figure 12 The diagram shows the structural components of the cable.

[0114] Figure 14 yes Figure 9 The diagram shows the hot-plug sequence of the power supply equipment in the power transmission system.

[0115] Figure 15 This is a schematic diagram of another power transmission system provided in the embodiments of this application.

[0116] Figure 16 yes Figure 15 A schematic diagram of the power supply equipment in the power transmission system shown.

[0117] Figure 17 yes Figure 15 A schematic diagram of the receiving equipment in the power transmission system is shown.

[0118] Figure 18 yes Figure 15 A schematic diagram of cables in a power transmission system is shown.

[0119] Figure 19 This is a schematic diagram of another power transmission system provided in the embodiments of this application.

[0120] Figure 20 This is a schematic diagram of another power transmission system provided in the embodiments of this application.

[0121] Figure 21 This is a schematic diagram illustrating the principle of cable removal in the embodiments of this application.

[0122] Figure 22 yes Figure 15 The diagram shows the hot-plug sequence of the power supply equipment in the power transmission system.

[0123] Figure 23 This is a schematic diagram of a power transmission method provided in an embodiment of this application.

[0124] Figure 24 This is a schematic diagram of another power transmission method provided in an embodiment of this application.

[0125] Figure 25 This is a schematic diagram of a graphical user interface provided in an embodiment of this application. Detailed Implementation

[0126] The embodiments of this application are described in detail below, and examples of these embodiments are illustrated in the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0127] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. In the description of this application, it should be understood that the terms “center,” “longitudinal,” “lateral,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0128] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0129] Before introducing the embodiments of this application, some terms that may be used in the following content will be explained and described.

[0130] Cable marker chips are used to identify cables, participate in the dynamic negotiation process of power and data transmission, ensure efficient and secure interaction between devices, and support functions such as standardized certification, quality control, and field configuration updates.

[0131] A negative temperature coefficient (NTC) thermistor is a resistor whose resistance decreases as temperature rises. Used in cables, it acts as a temperature sensing element to monitor internal temperature changes. When the internal temperature of the cable becomes too high, the resistance of this thermistor decreases, thus providing overheat protection for the cable.

[0132] A retimer in a cable can be used to recover and regenerate signals to overcome problems such as signal attenuation, distortion, and jitter during high-speed data transmission.

[0133] A pin is the exposed end of an electronic component used to connect to other components or for detection and analysis.

[0134] A voltage bus (VBUS) is a type of circuit line specifically used to provide power and transmit power-related information.

[0135] Pull-up resistors are resistors used to ensure that an input signal is at the expected logic level when an input port is not connected to a device or is in a high impedance state. Pull-down resistors work in a similar way to pull-up resistors, but are connected to ground (GND) and can keep the logic signal at near 0 volts even when no active device is connected to the pin.

[0136] To reduce the likelihood of arcing or electric arcing during cable hot-plugging and to ensure the safety of cable usage, this application provides a cable, a power supply interface, and a power receiving interface, which are described below.

[0137] Figure 1 The diagram shows an architecture of a power transmission system provided in an embodiment of this application, including a power supply device, a cable, and a power receiving device. The power supply device includes a power supply interface, and the power receiving device includes a power receiving interface. When both ends of the cable are electrically connected to the aforementioned power supply interface and power receiving interface, the power supply device can transmit electrical energy to the power receiving device through the cable, that is, the power supply device supplies power to the power receiving device.

[0138] In some examples, the power supply device can provide high-power power to the power receiving device via a cable. For example, the power receiving device can be a television or a smart screen, and the power supply device can include a power adapter for powering the television or smart screen.

[0139] Figure 2 The system architecture diagram further provides the specific components of the power supply equipment, power receiving equipment, and cables.

[0140] Power supply equipment can be configured with a physical layer, a protocol layer, and an application layer. Communication can be established between the power supply interface of the power supply equipment and the physical layer, between the physical layer and the protocol layer, and between the protocol layer and the application layer. The power supply equipment can also be configured with a power output module, which can control the power supply interface to transmit electrical energy to the cable.

[0141] The power receiving device can be configured with a physical layer, a protocol layer, and an application layer. Communication can be established between the power receiving interface of the power receiving device and the physical layer of the power receiving device, between the physical layer and the protocol layer, and between the protocol layer and the application layer. The power receiving device can also be configured with a power input module, which can control the power receiving interface to receive electrical energy transmitted through the cable.

[0142] Cables can include signal lines and power transmission lines. Signal lines can be used for communication between power supply equipment and power receiving equipment, or between the cable and the power supply equipment, or between the cable and the power receiving equipment. Signal lines can also be used by the power supply equipment (or the power receiving equipment) to supply power to electronic components such as chips inside the cable.

[0143] Power transmission lines are used to transmit electrical energy supplied by power supply equipment to power receiving equipment. There can be multiple power transmission lines; for example, two power transmission lines can be installed inside a cable, one for transmitting high-power electrical energy and the other for transmitting low-power electrical energy.

[0144] The cable may also contain a cable tag chip, which can communicate with the power supply equipment and / or the power receiving equipment. For example, the cable tag chip can communicate with the power supply equipment and the power receiving equipment to determine information such as power supply.

[0145] For example, refer to Figure 2 The cable may include signal lines CL1, CL2a, CL2b, cable tag chip CM1, and cable tag chip CM2. Signal line CL1 is electrically connected at both ends to the power supply interface of the power supply equipment and the power receiving interface of the power receiving equipment, respectively. Signal line CL1 can also have a communication connection with cable tag chips CM1 and CM2. In other words, signal line CL1 can provide a communication link for the power supply equipment, the power receiving equipment, and cable tag chips CM1 and CM2.

[0146] In one possible implementation, the communication architecture in cable tag chip CM1 and cable tag chip CM2 can also be set up according to three layers: physical layer, protocol layer and application layer. Information can be transmitted between the physical layer and the protocol layer, and between the protocol layer and the application layer.

[0147] For example, refer to Figure 2The cable may include a voltage bus (VBUS) for transmitting electrical energy between the power supply and the receiving device. The VBUS can have one or more voltage buses; for example, it may have two, including a first power transmission line and a second power transmission line. The first power transmission line can be used for high-power power transmission between the power supply and the receiving device, while the second power transmission line can be used for low-power power transmission between them.

[0148] In some examples, the cable may also be equipped with a negative temperature coefficient (NTC) resistor, which can be electrically connected to a cable tag chip inside the cable. The resistance value of the NTC decreases as the temperature increases, and the cable tag chip can determine the internal temperature of the cable by reading the resistance value of the NTC. When the internal temperature of the cable is too high, the resistance value of the NTC decreases, which can be used to some extent for overheat protection of the cable.

[0149] To reduce safety incidents such as arcing during cable hot-plugging, one or more of the cable, power supply equipment, or power receiving equipment can be improved. For example, an indicator structure can be installed at the end where the cable is connected to the power supply equipment and / or at the end where the cable is connected to the power receiving equipment. This indicator structure can detect the user's cable plugging and unplugging operation and convert the event into an electrical signal that can be detected by the circuit. Thus, during the user's hot-plugging of the cable, the power supply equipment or power receiving equipment can obtain the aforementioned electrical signal and execute corresponding safety protection measures before a safety incident occurs.

[0150] It should be noted that this application distinguishes between electrical connections and physical (or mechanical connections) between cables and devices. An electrical connection can be understood as the internal electrical circuitry of the cable and the internal electrical circuitry of the device being interconnected. A physical connection can be understood as a relative fixation between the cable and the device; for example, the cable is inserted into the device's cable interface, and the cable's fasteners and the device's fasteners mutually tighten each other. When a physical connection exists between the cable and the device, an electrical connection may or may not be present.

[0151] It should also be noted that there are various ways to physically connect cables and devices, including but not limited to: bolt connection, screw connection, riveting, key connection, pin connection, magnetic connection or snap-fit ​​connection, etc. The following examples use one or more of these physical connection methods as examples. It should be understood that these exemplary physical connection methods should not be construed as limiting this application.

[0152] Figure 3The diagram shown is a schematic of a power transmission system 100 provided in an embodiment of this application. The power transmission system 100 may include a power supply device 110, a power receiving device 120 and a cable 130. The two ends of the cable 130 may be electrically connected to the power supply device 110 and the power receiving device 120 respectively. The power supply device 110 can supply power to the power receiving device 120 through the cable 130.

[0153] Figure 4 The diagram shows a power supply device 110 in the power transmission system 100. The physical layer, protocol layer and other related components of the power supply device 110 are not shown in the diagram.

[0154] Power supply device 110 may include contacts Pt11 and Pt12, combined with Figure 3 and Figure 4 Contacts Pt11 and Pt12 can be electrically connected to cable 130.

[0155] In some examples, the power supply device 110 may include a power supply Vp11 and a power supply Vcl11, and the aforementioned contact Pt11 may be electrically connected to either power supply Vp11 or power supply Vcl11. Exemplarily, a resistor Rp11 may be provided on the connection line between power supply Vp11 and contact Pt11, and power supply Vcl11 may be grounded. In some scenarios, resistor Rp11 may also be referred to as a pull-up resistor.

[0156] In some examples, the power supply device 110 may include a power supply Vp12 and a power supply Vcl12, and the aforementioned contact Pt12 may be electrically connected to either power supply Vp12 or power supply Vcl12. Exemplarily, a resistor Rp12 may be provided on the connection line between power supply Vp12 and contact Pt12, and power supply Vcl12 may be grounded. In some scenarios, resistor Rp12 may also be referred to as a pull-up resistor.

[0157] In some examples, the power supply device 110 may also be provided with a processing unit 112, which may be used to detect the internal circuit status of the power supply device 110 (e.g., the level of nodes in the circuit), and may also be used to control one or more electronic components within the power supply device 110.

[0158] In order to detect the event that the cable is about to be unplugged before it is pulled out of the cable interface of the power supply equipment, and to prevent safety incidents and improve the electrical safety of the power supply equipment, the power supply equipment 110 may be equipped with multiple electronic components. These electronic components can be combined with the indicator structure of the cable 130 to trigger the generation of connection signals and / or disconnection signals. Here, the connection signal can indicate that the power supply equipment 110 and the cable 130 are about to complete a physical connection or have already completed a physical connection. Similarly, the disconnection signal can indicate that the power supply equipment 110 and the cable 130 are about to disconnect a physical connection or have already disconnected a physical connection.

[0159] In some examples, the power supply device 110 may also include a power supply Vp13, a first conductive component, and a second conductive component, wherein the first conductive component is electrically connected to the power supply Vp13, and the second conductive component is grounded. Exemplarily, the power supply device 110 may include a resistor R11, which may be connected between the power supply Vp13 and the first conductive component.

[0160] As one possible implementation, when the power supply device 110 is not physically connected to the cable 130, the first conductive component and the second conductive component are disconnected from each other. When the power supply device 110 is physically connected to the cable 130, the first conductive component and the second conductive component are electrically connected. When the electrical connection state between the first conductive component and the second conductive component changes, the voltage level on the electrical connection line between the first conductive component and the second conductive component will change. The processing unit 112 in the power supply device 110 can be used to detect the voltage level and / or voltage level change on the connection line to determine whether the power supply device 110 is physically connected to the cable 130.

[0161] For example, the processing unit 112 can detect the level and / or level change of node A on the connection line between the first conductive component and the second conductive component. For example, when the power supply device 110 is not physically connected to the cable 130, the level of node A is W0, and when the power supply device 110 is physically connected to the cable 130, the level of node A is W1, and the difference between W0 and W1 is ΔW.

[0162] One possible scenario is that when the level of node A changes from W0 to around W1, the processing unit 112 can determine that the cable 130 is physically connected to the power supply device 110; when the level of node A changes from W1 to around W0, the processing unit 112 can determine that the cable 130 is physically disconnected from the power supply device 110.

[0163] One possible scenario is that if the processing unit 112 detects a change of approximately ΔW in the voltage level of node A from W0, it can determine that the cable 130 is physically connected to the power supply device 110; if the processing unit 112 detects a change of approximately (-ΔW) in the voltage level of node A from W1, it can determine that the cable 130 is physically disconnected from the power supply device 110.

[0164] The voltage level of node A may be affected by a variety of factors. In order to improve the reliability of the result of the power supply equipment 110 determining the connection status with cable 130, the processing unit 112 can determine the connection status of power supply equipment 110 and cable 130 after the voltage level of node A changes and tends to stabilize.

[0165] One possible scenario is that if the level of node A changes from W0 to near W1, and the change in the level of node A within a preset time period is less than or equal to a preset threshold, the processing unit 112 can determine that the cable 130 is physically connected to the power supply device 110; if the level of node A changes from W1 to approximately W0, and the change in the level of node A within a preset time period is less than or equal to a preset threshold, the processing unit 112 can determine that the cable 130 is physically disconnected from the power supply device 110.

[0166] In the aforementioned scenarios, the voltage level and / or changes in voltage level used to determine the physical connection between the power supply device 110 and the cable 130 can be considered as a connection signal mentioned above. The processing unit 112 can determine the physical connection between the cable 130 and the power supply device 110 based on whether this connection signal is detected. For example, as... Figure 4 As shown, the connection signal can be SCNT_Good.

[0167] Similarly, the voltage level and / or voltage level change used to determine whether the power supply device 110 and the cable 130 are physically disconnected can be considered as a separation signal mentioned above. The processing unit 112 can determine whether the cable 130 and the power supply device 110 are physically disconnected based on whether the separation signal is detected. For example, the separation signal can be SCNT_Bad.

[0168] It should be noted that the names of the connection or separation signals (SCNT_Good, SCNT_Bad) mentioned above are merely illustrative, and these two signals may have other names, which are not limited in this application.

[0169] In some examples, the first and second conductive components described above can also be used for the physical connection between the power supply device 110 and the cable 130. Exemplarily, the first and second conductive components can be respectively... Figure 4 Conductive holes Hc11 and Hc12 are provided. During the connection of the power supply device 110 and the cable 130, two metal screws can be inserted into conductive holes Hc11 and Hc12 respectively. The two metal screws can be connected through the internal wiring of the cable 130. Thus, the physical connection status of the power supply device 110 and the cable 130 can be reflected by whether conductive holes Hc21 and Hc22 are electrically connected.

[0170] In some scenarios, the power supply Vp13, the first conductive component, the second conductive component, and these electronic components in the power supply equipment 110 can jointly form a signal generation circuit. This signal generation circuit can cooperate with the indicator structure of the cable 130 to generate the aforementioned connection signal or separation signal.

[0171] In some scenarios, the aforementioned first conductive component and second conductive component can be used to trigger the generation of connection signals and / or separation signals, or to realize the physical connection between the cable 130 and the power supply device 110. In this case, the first conductive component and the second conductive component can also be regarded as an indicator structure. In other words, in this case, the power supply device 110 can also be regarded as a structure that includes a structure with a similar function to the indicator structure of the cable 130.

[0172] In some examples, the processing unit 112 within the power supply device 110 can be used to detect the voltage levels of contact Pt11 and contact Pt12.

[0173] For example, continue to refer to Figure 4 Processing unit 112 and contact Pt11 can be connected to node Ct11, which is located on the connection line between contact Pt11 and power supply Vp11. For example, Ct11 can be located between resistor Rp11 and contact Pt11. Similarly, processing unit 112 and contact Pt12 can be connected to node Ct12, which is located on the connection line between contact Pt12 and power supply Vp12. For example, Ct12 can be located between resistor Rp12 and contact Pt12.

[0174] One possibility is that the processing unit 112 can determine whether the power supply device 110 is electrically connected to the power receiving device 120 via the cable 130 by detecting the level and / or level change of the contact Pt11.

[0175] For example, contact Pt11 is electrically connected to power supply Vp11. The voltage level of contact Pt11, which is electrically connected to power supply Vp11, may have an initial value (or a default value). When it is detected that the voltage level of contact Pt11 changes from the initial value Y11 to a preset value Y12, and / or the decrease in voltage level Y13 of contact Pt11 is greater than or equal to a preset magnitude Y14, processing unit 112 can determine that power supply device 110 and power receiving device 120 are electrically connected. When it is detected that the voltage level of contact Pt11 changes from the aforementioned preset value Y12 to the initial value Y11, and / or the increase in voltage level Y15 of contact Pt11 is greater than or equal to a preset magnitude Y16, processing unit 112 can determine that power supply device 110 and power receiving device 120 are electrically disconnected.

[0176] Another possibility is that the processing unit 112 can also determine whether the power supply device 110 is electrically connected to the power receiving device 120 via the cable 130 by detecting the level and / or level change of the contact Pt12.

[0177] For example, contact Pt12 is electrically connected to power supply Vp12. The voltage level of contact Pt12, which is electrically connected to power supply Vp12, may have an initial value (or a default value). When it is detected that the voltage level of contact Pt12 changes from the initial value Y11 to the preset value Y12, and / or the decrease in voltage level Y13 of contact Pt12 is greater than or equal to the preset magnitude Y14, processing unit 112 can determine that power supply device 110 and power receiving device 120 are electrically connected. When it is detected that the voltage level of contact Pt12 changes from the preset value Y12 to the initial value Y11, and / or the increase in voltage level Y15 of contact Pt12 is greater than or equal to the preset magnitude Y16, processing unit 112 can determine that power supply device 110 and power receiving device 120 are electrically disconnected.

[0178] One possibility is that the processing unit 112 can determine whether the cable 130 is electrically connected to the power supply device 110 by detecting the level and / or level changes of the contact Pt12.

[0179] For example, contact Pt12 is electrically connected to power supply Vp12. The voltage level of contact Pt12, which is electrically connected to power supply Vp12, can have an initial value (default value). When it is detected that the voltage level of contact Pt12 changes from the initial value Z11 to the preset value Z12, and / or the magnitude of the change in voltage level Z13 of contact Pt12 is greater than or equal to the preset magnitude Z14, the processing unit 112 can determine that cable 130 is electrically connected to power supply device 110. When it is detected that the voltage level of contact Pt12 changes from the aforementioned preset value Z12 to the initial value Z11, and / or the magnitude of the change in voltage level Z15 of contact Pt12 is greater than or equal to the preset magnitude Z16, the processing unit 112 can determine that cable 130 is electrically disconnected from power supply device 110.

[0180] Another possibility is that the processing unit 112 can determine whether the cable 130 is electrically connected to the power supply device 110 by detecting the level and / or level change of the contact Pt11.

[0181] For example, contact Pt11 is electrically connected to power supply Vp11. The voltage level of contact Pt11, which is electrically connected to power supply Vp11, can have an initial value (default value). When it is detected that the voltage level of contact Pt11 changes from the initial value Z11 to a preset value Z12, and / or the magnitude of the change in voltage level Z13 of contact Pt11 is greater than or equal to a preset magnitude Z14, processing unit 112 can determine that cable 130 is electrically connected to power supply device 110. When it is detected that the voltage level of contact Pt11 changes from the aforementioned preset value Z12 to the initial value Z11, and / or the magnitude of the change in voltage level Z15 of contact Pt11 is greater than or equal to a preset magnitude Z16, processing unit 112 can determine that cable 130 is electrically disconnected from power supply device 110.

[0182] It should be noted that when the powered device 120 is detected to be electrically connected to the power supply device 110, the processing unit 112 can also determine that the cable 130 is electrically connected to the power supply device 110. In the above example, the determination of whether the cable 130 is electrically connected to the power supply device 110 is made by detecting the level and / or level change of the contact Pt11 or the contact Pt12. This can also be understood as determining whether the internal electronic components (e.g., cable tag chip) of the cable 130 are electrically connected to the power supply device 110 by detecting the level and / or level change of the contact Pt11 or the contact Pt12.

[0183] In some examples, the aforementioned processing unit 112 may include a transmitting subunit and a receiving subunit, or in other words, the processing unit 112 may include a communication subunit. The transmitting subunit or communication subunit may be used to send information to the cable 130 or the powered device 120, and the receiving subunit or communication subunit may be used to receive information from the cable 130 or the powered device 120.

[0184] For example, the processing unit 112 can interact with the cable 130 and the powered device 120 through the communication subunit to determine information such as the output power when the power supply device 110 supplies power to the powered device 120.

[0185] In some examples, continue to refer to Figure 4 The power supply equipment 110 may also be equipped with a single-pole double-throw switch Sw11 and a single-pole double-throw switch Sw12. The single-pole double-throw switch Sw11 can be used to connect the contact point Pt11 to the power supply Vp11 or the power supply Vcl11, and the single-pole double-throw switch Sw12 can be used to connect the contact point Pt12 to the power supply Vp12 or the power supply Vcl12.

[0186] For example, the common terminal of the single-pole double-throw switch Sw11 is electrically connected to contact Pt11, the first contact of the single-pole double-throw switch Sw11 is electrically connected to power supply Vp11, and the second contact of the single-pole double-throw switch Sw11 is electrically connected to power supply Vcl11. Thus, when the common terminal of the single-pole double-throw switch Sw11 is electrically connected to the first contact, contact Pt11 is electrically connected to power supply Vp11; when the common terminal of the single-pole double-throw switch Sw11 is connected to the second contact, contact Pt11 is electrically connected to power supply Vcl11.

[0187] Similarly, by way of example, the common terminal of the single-pole double-throw switch Sw12 is connected to the contact Pt12, the first contact of the single-pole double-throw switch Sw12 is electrically connected to the power supply Vp12, and the second contact of the single-pole double-throw switch Sw12 is electrically connected to the power supply Vcl12. In other words, the electrical connection between the contact Pt12 and the power supply Vp12 or the power supply Vcl12 can be achieved by switching the state of the single-pole double-throw switch Sw12.

[0188] In some examples, the aforementioned processing unit 112 can also be used to control the state switching of the aforementioned single-pole double-throw switch Sw11 and single-pole double-throw switch Sw12. In other words, the processing unit 112 can be used to control the contact Pt11 to be electrically connected to the power supply Vp11 or the power supply Vcl11, and the processing unit 112 can also be used to control the contact Pt12 to be electrically connected to the power supply Vp12 or the power supply Vcl12.

[0189] One possible scenario is that, when cable 130 is electrically connected to power supply device 110, in response to receiving an indication signal to power the cable tag chip in cable 130, processing unit 112 can control single-pole double-throw switch Sw12 to electrically connect power supply Vcl12 and contact Pt12. When cable 130 is disconnected from power supply device 110, processing unit 112 can control single-pole double-throw switch Sw12 to electrically connect power supply Vp12 and contact Pt12.

[0190] Another possible scenario is that, when cable 130 is electrically connected to power supply device 110, in response to receiving an indication signal to power the cable tag chip in cable 130, processing unit 112 can control single-pole double-throw switch Sw11 to electrically connect power supply Vcl11 and contact Pt11. When cable 130 is disconnected from power supply device 110, processing unit 112 can control single-pole double-throw switch Sw11 to electrically connect power supply Vp11 and contact Pt11.

[0191] In some examples, the power supply device 110 may also be equipped with a first switch, a second switch, a third switch, and a fourth switch. The first and second switches can be used to implement the functions of the aforementioned single-pole double-throw switch Sw11, and the third and fourth switches can be used to implement the functions of the aforementioned single-pole double-throw switch Sw12.

[0192] For example, the first switch can be used to connect the contact point Pt11 and the power supply Vp11, and the second switch can be used to connect the contact point Pt11 and the power supply Vcl11.

[0193] For example, the third switch can be used to connect the contact point Pt12 and the power supply Vp12, and the fourth switch can be used to connect the contact point Pt12 and the power supply Vcl12.

[0194] Similarly, the aforementioned processing unit 112 can be used to control the state of multiple switches, such as the first switch, to control the electrical connection between contact Pt11 and power supply Vp11 or power supply Vcl11, or to control the electrical connection between contact Pt12 and power supply Vp12 or power supply Vcl12. The relevant control methods can be referred to the content of the processing unit 112 controlling the state of the single-pole double-throw switch, which will not be elaborated here.

[0195] To simplify the circuit structure of the power supply device 110, in some examples, power supplies Vcl11 and Vcl12 in the power supply device 110 can be the same power supply. Similarly, power supplies Vp11 and Vp12 can be the same power supply, or power supplies Vp11, Vp12 and Vp13 can be the same power supply.

[0196] Figure 5 The diagram shows a power receiving device 120 in the power transmission system 100. The physical layer, protocol layer and other related components of the power receiving device 120 are not shown in the diagram.

[0197] The power receiving device 120 may include contacts Pt21 and Pt22, combined with Figure 3 and Figure 5 Contacts Pt21 and Pt22 can be used for electrical connection with cable 130.

[0198] In some examples, contact Pt21 can be grounded through resistor Rd21, which can also be called a pull-down resistor in some scenarios.

[0199] In some examples, the powered device 120 may include power supplies Vp21 and Vcl21, and the aforementioned contact Pt21 may be electrically connected to either power supply Vp21 or Vcl21. Exemplarily, a resistor Rp21 may be provided on the connection line between power supply Vp21 and contact Pt21, and power supply Vcl21 may be grounded. In some scenarios, resistor Rp21 may also be referred to as a pull-up resistor.

[0200] In some examples, contact Pt22 can be grounded through resistor Rd22, which can also be referred to as a pull-down resistor in some scenarios.

[0201] In some examples, the powered device 120 may include power supplies Vp22 and Vcl22, and the aforementioned contact Pt22 may be electrically connected to either power supply Vp22 or power supply Vcl22. For example, a resistor Rp22 may be provided on the connection line between power supply Vp22 and contact Pt22, and power supply Vcl22 may be grounded. In some scenarios, resistor Rp22 may also be referred to as a pull-up resistor.

[0202] In some examples, the powered device 120 may also be provided with a processing unit 122, which may be used to detect the internal circuit conditions of the powered device 120 (e.g., the level of nodes in the circuit), and may also be used to control one or more electronic components within the powered device 120.

[0203] In order to detect the event that the cable is about to be unplugged before it is pulled out of the cable interface of the powered device, so as to prevent safety incidents and improve the electrical safety of the power supply equipment, the powered device 120 may be equipped with multiple electronic components. These electronic components can be combined with the indicator structure of the cable 130 to trigger the generation of connection signals and / or disconnection signals. Here, the connection signal can indicate that the powered device 120 and the cable 130 are about to complete a physical connection or have already completed a physical connection. Similarly, the disconnection signal can indicate that the powered device 120 and the cable 130 are about to disconnect a physical connection or have already disconnected a physical connection.

[0204] In some examples, the powered device 120 may also include a power supply Vp23, a third conductive component, and a fourth conductive component, wherein the third conductive component is electrically connected to the power supply Vp23, and the fourth conductive component is grounded. Exemplarily, the powered device 120 may include a resistor R21, which may be connected between the power supply Vp23 and the third conductive component.

[0205] As one possible implementation, when the powered device 120 is not physically connected to the cable 130, the third and fourth conductive components are disconnected; when the powered device 120 is physically connected to the cable 130, the third and fourth conductive components are electrically connected. When the third and fourth conductive components are electrically connected, the voltage level on the electrical connection line between the third and fourth conductive components will change. The processing unit 122 in the powered device 120 can be used to detect the voltage level and / or voltage change on the connection line to determine whether the powered device 120 is physically connected to the cable 130.

[0206] For example, the processing unit 122 can detect the level and / or level change of node B on the connection line between the third conductive component and the fourth conductive component. For example, when the powered device 120 is not physically connected to the cable 130, the level of node B is Q0, and when the powered device 120 is physically connected to the cable 130, the level of node B is Q1, and the difference between Q0 and Q1 is ΔQ.

[0207] One possible scenario is that when the level of node B is detected to change from Q0 to around Q1, the processing unit 122 can determine that the cable 130 is physically connected to the powered device 120; when the level of node B is detected to change from Q1 to around Q0, the processing unit 122 can determine that the cable 130 is physically disconnected from the powered device 120.

[0208] One possible scenario is that if the processing unit 122 detects a change in the voltage level of node B from Q0 to approximately ΔQ, it can determine that the cable 130 is physically connected to the powered device 120; if the processing unit 122 detects a change in the voltage level of node B from Q1 to approximately (-ΔQ), it can determine that the cable 130 is physically disconnected from the powered device 120.

[0209] The voltage level of node B may be affected by various factors. In order to improve the reliability of the result of the power receiving device 120 determining the connection status with cable 130, the processing unit 122 can determine the connection status of the power receiving device 120 and cable 130 after the voltage level of node B changes and tends to stabilize.

[0210] One possible scenario is that if the level of node B changes from Q0 to near Q1, and the change in the level of node B is less than or equal to a preset threshold within a preset time period, the processing unit 122 can determine that the cable 130 is physically connected to the powered device 120; if the level of node B changes from Q1 to around Q0, and the change in the level of node B is less than or equal to a preset threshold within a preset time period, the processing unit 122 can determine that the cable 130 is physically disconnected from the powered device 120.

[0211] In the aforementioned scenarios, the voltage level and / or changes in voltage level used to determine the physical connection between the powered device 120 and the cable 130 can be considered as a connection signal mentioned above. The processing unit 122 can determine the physical connection between the cable 130 and the powered device 120 based on whether this connection signal is detected. For example, as... Figure 5 As shown, the connection signal can be MCNT_Good.

[0212] Similarly, the voltage level and / or change in voltage level used to determine whether the powered device 120 is physically disconnected from the cable 130 can be considered as a separation signal mentioned above. The processing unit 122 can determine whether the cable 130 is physically disconnected from the powered device 120 based on whether the separation signal is detected. For example, the separation signal can be MCNT_Bad.

[0213] It should be noted that the names of the connection or separation signals (MCNT_Good, MCNT_Bad) mentioned above are merely illustrative, and these two signals may have other names, which are not limited in this application.

[0214] In some examples, the aforementioned third and fourth conductive components can also be used for the physical connection between the powered device 120 and the cable 130. Exemplarily, the third and fourth conductive components can be respectively... Figure 5The conductive holes Hc21 and Hc22 are used in the cable 130. During the connection between the powered device 120 and the cable 130, two metal screws can be inserted into the conductive holes Hc21 and Hc22 respectively. The two metal screws are connected by the internal wiring of the cable 130. Thus, the physical connection status between the powered device 120 and the cable 130 can be reflected by whether the conductive holes Hc21 and Hc22 are electrically connected.

[0215] In some scenarios, the power supply Vp23, the third conductive component, the fourth conductive component, and these electronic components in the power receiving device 120 can jointly form a signal generation circuit, which can cooperate with the indicator structure of the cable 130 to generate the aforementioned connection signal or disconnection signal.

[0216] In some scenarios, the aforementioned third and fourth conductive components can be used to trigger the generation of connection and / or separation signals, or to realize the physical connection between the cable 130 and the powered device 120. In this case, the third and fourth conductive components can also be regarded as an indicator structure. In other words, in this case, the powered device 120 can also be regarded as a structure that includes a structure with a similar function to the indicator structure of the cable 130.

[0217] In some examples, the processing unit 122 within the powered device 120 can be used to detect the voltage levels of contact Pt21 and contact Pt22.

[0218] For example, continue to refer to Figure 5 Processing unit 122 and contact Pt21 can be connected to node Ct21, which is located on the connection line between contact Pt21 and power supply Vp21 and between contact Pt21 and resistor Rd21. For example, node Ct21 can be located between resistor Rp21 and contact Pt21. Similarly, processing unit 122 and contact Pt22 can be connected to node Ct22, which is located on the connection line between contact Pt22 and power supply Vp22 and between contact Pt22 and resistor Rd22. For example, node C22 can be located between resistor Rp22 and contact Pt22.

[0219] One possibility is that the processing unit 122 can determine whether the power supply device 110 is electrically connected to the power receiving device 120 via the cable 130 by detecting the level and / or level change of the contact Pt21.

[0220] For example, contact Pt21 is electrically connected to resistor Rd21. The voltage level of contact Pt21, which is electrically connected to resistor Rd21, can have an initial value (or a default value). When it is detected that the voltage level of contact Pt21 changes from the initial value Y21 to a preset value Y22, and / or the rise in voltage level Y23 of contact Pt21 is greater than or equal to a preset amplitude Y24, the processing unit 122 can determine that the power supply device 110 and the power receiving device 120 are electrically connected. When it is detected that the voltage level of contact Pt21 changes from the preset value Y22 to the initial value Y21, and / or the fall in voltage level Y25 of contact Pt21 is greater than or equal to a preset amplitude Y26, the processing unit 122 can determine that the power supply device 110 and the power receiving device 120 are electrically disconnected.

[0221] Another possibility is that the processing unit 122 can also determine whether the power supply device 110 is electrically connected to the power receiving device 120 via the cable 130 by detecting the level and / or level change of the contact Pt22.

[0222] For example, contact Pt22 is electrically connected to resistor Rd22. The voltage level of contact Pt22, which is electrically connected to resistor Rd22, can have an initial value (or a default value). When it is detected that the voltage level of contact Pt22 changes from the initial value Y21 to the preset value Y22, and / or the rise amplitude Y23 of the voltage level of contact Pt22 is greater than or equal to the preset amplitude Y24, the processing unit 122 can determine that the power supply device 110 and the power receiving device 120 are electrically connected. When it is detected that the voltage level of contact Pt22 changes from the preset value Y22 to the initial value Y21, and / or the fall amplitude Y25 of the voltage level of contact Pt22 is greater than or equal to the preset amplitude Y26, the processing unit 122 can determine that the power supply device 110 and the power receiving device 120 are electrically disconnected.

[0223] One possibility is that the processing unit 122 can determine whether the cable 130 is electrically connected to the powered device 120 by detecting the level of the contact Pt22.

[0224] For example, contact Pt22 is electrically connected to power supply Vp22. The voltage level of contact Pt22, which is electrically connected to power supply Vp22, can have an initial value (default value). When it is detected that the voltage level of contact Pt22 changes from the initial value Z21 to the preset value Z22, and / or the magnitude of the change in voltage level Z23 of contact Pt22 is greater than or equal to the preset magnitude Z24, the processing unit 122 can determine that cable 130 is electrically connected to powered device 120. When it is detected that the voltage level of contact Pt22 changes from the aforementioned preset value Z22 to the initial value Z21, and / or the magnitude of the change in voltage level Z25 of contact Pt22 is greater than or equal to the preset magnitude Z26, the processing unit 122 can determine that cable 130 is electrically disconnected from powered device 120.

[0225] Another possibility is that the processing unit 122 can determine whether the cable 130 is electrically connected to the powered device 120 by detecting the level of the contact Pt21.

[0226] For example, contact Pt21 is electrically connected to power supply Vp21. The voltage level of contact Pt21, which is electrically connected to power supply Vp21, can have an initial value (default value). When it is detected that the voltage level of contact Pt21 changes from the initial value Z21 to a preset value Z22, and / or the magnitude of the change in voltage level Z23 of contact Pt21 is greater than or equal to a preset magnitude Z24, the processing unit 122 can determine that cable 130 is electrically connected to powered device 120. When it is detected that the voltage level of contact Pt21 changes from the aforementioned preset value Z22 to the initial value Z21, and / or the magnitude of the change in voltage level Z25 of contact Pt21 is greater than or equal to a preset magnitude Z26, the processing unit 122 can determine that cable 130 is electrically disconnected from powered device 120.

[0227] It should be noted that when the power supply device 110 is detected to be electrically connected to the power receiving device 120, the processing unit 122 can also determine that the cable 130 is electrically connected to the power receiving device 120. In the above example, the determination of whether the cable 130 is electrically connected to the power receiving device 120 is made by detecting the level and / or level change of the contact Pt21 or the contact Pt22. This can also be understood as determining whether the internal electronic components (e.g., cable tag chip) of the cable 130 are electrically connected to the power receiving device 120 by detecting the level and / or level change of the contact Pt11 or the contact Pt12.

[0228] In some examples, the aforementioned processing unit 122 may include a transmitting subunit and a receiving subunit, or in other words, the processing unit 122 may include a communication subunit. The transmitting subunit or communication subunit may be used to send information to the cable 130 or the power supply device 110, and the receiving subunit or communication subunit may be used to receive information from the cable 130 or the power supply device 110.

[0229] For example, the processing unit 122 can interact with the cable 130 and the power supply device 110 through the communication subunit to determine information such as the output power of the power supply device 110 when it supplies power to the powered device 120.

[0230] In some examples, the power receiving device 120 may also be equipped with a first single-pole three-throw switch and a second single-pole three-throw switch. The first single-pole three-throw switch is used to connect contact point Pt21 to power supply Vp21, power supply Vcl21, or resistor Rd21. The second single-pole three-throw switch is used to connect contact point Pt22 to power supply Vp22, power supply Vcl22, or resistor Rd22.

[0231] For example, the common terminal of the first single-pole three-throw switch is connected to contact Pt21, the first contact of the first single-pole three-throw switch is electrically connected to power supply Vp21, the second contact of the first single-pole three-throw switch is electrically connected to power supply Vcl21, and the third contact of the first single-pole three-throw switch is electrically connected to resistor Rd21. Thus, when the common terminal of the first single-pole three-throw switch is electrically connected to the first contact, the second contact, or the third contact, contact Pt21 is electrically connected to power supply Vp21, power supply Vcl21, and resistor Rd21, respectively.

[0232] Similarly, by way of example, the common terminal of the second single-pole triple-throw switch is electrically connected to contact Pt22, the first contact of the second single-pole triple-throw switch is electrically connected to power supply Vp22, the second contact of the second single-pole triple-throw switch is electrically connected to power supply Vcl22, and the third contact of the second single-pole triple-throw switch is electrically connected to resistor Rd22. Thus, when the common terminal of the second single-pole triple-throw switch is electrically connected to the first contact, the second contact, or the third contact, contact Pt22 is electrically connected to power supply Vp22, power supply Vcl22, and resistor Rd22, respectively.

[0233] In some examples, the aforementioned processing unit 122 can also be used to control the state switching of the aforementioned first single-pole three-throw switch and second single-pole three-throw switch. In other words, the processing unit 122 can be used to control the contact Pt21 to be electrically connected to the power supply Vp21 or power supply Vcl21 or resistor Rd21. The processing unit 122 can also be used to control the contact Pt22 to be electrically connected to the power supply Vp22 or power supply Vcl22 or resistor Rd22.

[0234] One possible scenario is that, with the powered device 120 electrically connected to the cable 130, contact Pt21 is electrically connected to resistor Rd21, and contact Pt22 is electrically connected to resistor Rd22.

[0235] In some examples, when an electrical connection between the power supply device 110 and the power receiving device 120 is detected by the level and / or level change of contact Pt21, the processing unit 122 can control the connection between the aforementioned second single-pole triple-throw switch contact Pt22 and the power supply Vp22; when an electrical connection between the power receiving device 120 and the cable 130 is detected by the level and / or level change of contact Pt22, the processing unit 122 can control the connection between the aforementioned second single-pole triple-throw switch contact Pt22 and the power supply Vcl22; when the power supply device 110 or the cable 130 is disconnected from the power receiving device 120, the processing unit 122 can control the connection between the aforementioned second single-pole triple-throw switch contact Pt22 and the resistor Rd22.

[0236] In some examples, when an electrical connection between the power supply device 110 and the power receiving device 120 is detected by the level and / or level change of contact Pt22, the processing unit 122 can control the connection between the aforementioned first single-pole three-throw switch contact Pt21 and the power supply Vp21; when an electrical connection between the power receiving device 120 and the cable 130 is detected by the level and / or level change of contact Pt21, the processing unit 122 can control the connection between the aforementioned first single-pole three-throw switch contact Pt21 and the power supply Vcl21; when the power supply device 110 or the cable 130 is disconnected from the power receiving device 120, the processing unit 122 can control the connection between the aforementioned first single-pole three-throw switch contact Pt21 and the resistor Rd21.

[0237] In some examples, the power receiving device 120 may also be equipped with switches Sw21-1, Sw21-2, Sw21-3, Sw22-1, Sw22-2, and Sw22-3. Switches Sw21-1, Sw21-2, and Sw21-3 can be used to implement the function of the aforementioned first single-pole three-throw switch, while switches Sw22-1, Sw22-2, and Sw22-3 can be used to implement the function of the aforementioned second single-pole three-throw switch.

[0238] For example, switch Sw21-1 can be used to connect contact Pt21 and power supply Vp21, switch Sw21-2 can be used to connect contact Pt21 and power supply Vcl21, and switch Sw21-3 can be used to connect contact Pt21 and resistor Rd21.

[0239] For example, switch Sw22-1 can be used to connect contact Pt22 and power supply Vp22, switch Sw22-2 can be used to connect contact Pt22 and power supply Vcl22, and switch Sw22-3 can be used to connect contact Pt22 and resistor Rd22.

[0240] Similarly, the aforementioned processing unit 122 can be used to control the state of multiple switches such as the aforementioned switch Sw21-1 to control the contact Pt21 to be electrically connected to the power supply Vp21, power supply Vcl21 or resistor Rd21, or to control the contact Pt22 to be electrically connected to the power supply Vp22, power supply Vcl22 or resistor Rd22. The relevant control methods can be referred to the content of the processing unit 122 controlling the state of the single-pole three-throw switch, which will not be elaborated here.

[0241] To simplify the circuit structure of the powered device 120, in some examples, power supplies Vcl21 and Vcl22 in the powered device 120 can be the same power supply. Similarly, power supplies Vp21 and Vp22 can be the same power supply, or power supplies Vp21, Vp22 and Vp23 can be the same power supply.

[0242] Figure 6 The diagram shows a cable 130 in the power transmission system 100. The cable 130 includes an indicator structure that can trigger the generation of the aforementioned connection and / or disconnection signals. The connection signal indicates that the cable 130 is about to complete a physical connection with the power supply device 110 (or the power receiving device 120) or has already completed a physical connection. Similarly, the disconnection signal indicates that the cable 130 is about to disconnect from the power supply device 110 (or the power receiving device 120) or has already disconnected. In some scenarios, the power supply device 110 or the power receiving device 120 connected to the cable 130 can both be referred to as the target device.

[0243] Cable 130 may include cable tag chip CM1, cable tag chip CM2, signal line CL1, signal line CL2a and signal line CL2b, and voltage bus VBUS. For details on these electronic components and connecting lines, please refer to the previous text. Figure 2 Some related explanations will not be repeated here.

[0244] In some examples, cable 130 may include contacts Pt31a, Pt31b, Pt32a, and Pt32b, wherein contacts Pt31a and Pt32a are located at the same end of cable 130 (e.g., referred to as end A), and contacts Pt31b and Pt32b may be located at the other end of cable 130 (e.g., referred to as end B). Contacts Pt31a and Pt32a may be electrically connected to one of the power supply device 110 and the power receiving device 120, while contacts Pt31b and Pt32b may be electrically connected to the other device.

[0245] As an example, refer to Figure 3 End A of cable 130 is electrically connected to power supply equipment 110, and end B of cable 130 is electrically connected to power receiving equipment 120. Specifically, contacts Pt31a and Pt32a at end A of cable 130 are electrically connected to contacts Pt11 and Pt12 of the power supply equipment, respectively, and contacts Pt31b and Pt32b at end B of cable are electrically connected to contacts Pt21 and Pt22 of the power receiving equipment, respectively.

[0246] For example, contact Pt31a can be electrically connected to contact Pt31b via signal line CL1. When cable 130 is electrically connected to power supply device 110 and power receiving device 120 respectively, signal line CL1 can be used for communication between cable 130 and power supply device 110, cable 130 and power receiving device 120, and power supply device 110 and power receiving device 120.

[0247] For example, contact Pt32a can be electrically connected to cable tag chip CM1 via signal line CL2a, and contact Pt32b can be electrically connected to cable tag chip CM2 via signal line CL2b. When end A of the cable is electrically connected to power supply device 110 and end B of the cable is electrically connected to power receiving device 120, power supply device 110 can supply power to cable tag chip CM1 via signal line CL2a, and power receiving device 120 can supply power to cable tag chip CM2 via signal line CL2b.

[0248] In some examples, cable 130 may also include resistors Ra1 and Ra2, with one end of resistor Ra1 electrically connected to contact Pt32a and the other end grounded; one end of resistor Ra2 is electrically connected to contact Pt32b and the other end grounded. In some scenarios, both resistors Ra1 and Ra2 can be referred to as pull-down resistors.

[0249] In one possible implementation, both the power supply device 110 and the power receiving device 120 can determine whether they are electrically connected to the cable 130 by detecting whether they are electrically connected to resistor Ra1 or resistor Ra2.

[0250] The method by which the processing unit 112 in the power supply equipment 110 detects whether it is electrically connected to the cable 130 by detecting the level of the contact Pt11 or the contact Pt12 is essentially based on the fact that after the contact Pt11 or the contact Pt12 is electrically connected to the contact Pt32a in the cable 130, the level of the contact Pt11 or the contact Pt12 will change due to the influence of the resistor Ra1 or the resistor Ra2.

[0251] In order to detect the event that the cable 130 is about to be unplugged before it is pulled out of the cable interface of the device, the cable 130 may be provided with multiple conductive components. The multiple conductive components can cooperate with the signal generation circuit of the power supply device 110 or the power receiving device 120 to generate the aforementioned connection signal or disconnection signal.

[0252] In some examples, cable 130 may include an indicator structure, which may include a fifth conductive component, a sixth conductive component, a seventh conductive component, and an eighth conductive component. The fifth and sixth conductive components are electrically connected and located at end A of cable 130; the seventh and eighth conductive components are electrically connected and located at end B of cable 130.

[0253] During the physical connection between end A of cable 130 and power supply device 110, the fifth and sixth conductive components can respectively contact the first and second conductive components in power supply device 110. Consequently, the first and second conductive components, originally in a disconnected state, can be connected by the interconnected fifth and sixth conductive components. During the process of unplugging end A of cable 130 from the cable interface of power supply device 110, i.e., separating cable 130 from power supply device 110, the fifth and sixth conductive components can respectively separate from the first and second conductive components. Consequently, the first and second conductive components, previously in a connected state, can return to a disconnected state.

[0254] During the physical connection between end B of cable 130 and power receiving device 120, the seventh and eighth conductive components can respectively contact the third and fourth conductive components in power receiving device 120. Consequently, the third and fourth conductive components, which were originally disconnected, can be made conductive by the interconnected seventh and eighth conductive components. During the process of unplugging end B of cable 130 from the cable interface of power receiving device 120, i.e., during the separation of cable 130 from power receiving device 120, the seventh and eighth conductive components can respectively separate from the third and fourth conductive components, thereby restoring the third and fourth conductive components, which were previously in a connected state, to a disconnected state.

[0255] In some examples, the indicator structure can also be used for the physical connection of cable 130 to power supply device 110 or power receiving device 120.

[0256] For example, refer to Figure 6 The fifth, sixth, seventh, and eighth conductive components mentioned above can be conductive holes Hc31a, Hc32a, Hc31b, and Hc32b, respectively. The indicating structure may also include multiple screws, such as screws Sc1a, Sc2a, Sc1b, and Sc2b.

[0257] The A end of cable 130 can be physically connected via conductive holes Hc31a, Hc32a, screws Sc1a and Sc2a, and conductive holes Hc11 and Hc12 on power supply device 110. Specifically, screw Sc1a can pass through both conductive hole Hc11 of power supply device 110 and conductive hole Hc31a of cable 130, with the external thread of the screw and the internal thread of the conductive hole interlocking; screw Sc2a can pass through both conductive hole Hc12 of power supply device 110 and conductive hole Hc32a of cable 130, with the external thread of the screw and the internal thread of the conductive hole interlocking.

[0258] Similarly, the B end of cable 130 can be physically connected via conductive holes Hc31b and Hc32b, screws Sc1b and Sc2b, and conductive holes Hc21 and Hc22 on the power receiving device 120. Specifically, screw Sc1b can pass through both conductive hole Hc21 of the power receiving device 120 and conductive hole Hc31b of cable 130, with the external thread of the screw and the internal thread of the conductive hole engaging with each other; screw Sc2b can pass through both conductive hole Hc22 of the power receiving device 120 and conductive hole Hc32b of cable 130, with the external thread of the screw and the internal thread of the conductive hole engaging with each other.

[0259] The aforementioned screws Sc1a, Sc2a, Sc1b, and Sc2b can all be made of a conductive material (e.g., a metal), or the surfaces of screws Sc1a, Sc2a, Sc1b, and Sc2b can be coated with a conductive layer. In the case where the screw physically connects the cable 130 to two opposing conductive holes in the power supply device 110 or the power receiving device 120, the screw is also electrically connected to each of the two conductive holes, thus enabling electrical connection between the opposing conductive holes.

[0260] The above-described method of using screws and conductive holes to physically connect cable 130 to the target device is merely an example. Cable 130 and the target device can also be physically connected by means of pin connection, riveting, etc. For different physical connection methods, the physical form of the conductive components in cable 130 may be different, and this application does not impose any restrictions on this.

[0261] For example, a pair of plate-shaped connectors can be provided at both ends of the cable 130. The plate-shaped connectors can be made of conductive material and have through holes. This pair of plate-shaped connectors can also be used to trigger connection signals and / or separation signals. In order to achieve physical and electrical connection between the cable 130 and the target device, the cable 130 can also be equipped with metal pins. The connection position between the target device and the cable 130 can be provided with a structure similar to the plate-shaped connectors. When the metal pins are inserted into the through holes of the two pairs of plate-shaped connectors respectively provided on the cable 130 and the target device, the cable 130 and the target device can achieve physical and electrical connection.

[0262] For example, cable sleeves can be provided at both ends of cable 130, and magnetic spring contacts can be provided on the end faces of the cable sleeves. These magnetic spring contacts can connect to the end face of the cable interface of the target device. When cable 130 is connected to the target device, the magnetic connection between the magnetic spring contacts and the end face of the cable interface of the target device must be disconnected before cable 130 can be pulled out of the cable interface. There can be two magnetic spring contacts on the end faces of the cable sleeves, and the two contacts are electrically connected. In this structure, the two magnetic spring contacts can be considered as the fifth and sixth conductive components in the above scheme.

[0263] For example, the two ends of the cable 130 can also be equipped with sliding locks or rotary locks. When the cable 130 is connected to the target device, the sliding lock at the end of the cable 130 needs to be slid to the target position or the rotary lock needs to be rotated to the target position so that the sliding lock or rotary lock is in the unlocked state before the cable 130 can be pulled out from the cable interface of the target device.

[0264] In this case, the indicating structure of cable 130 can be a slide lock or a rotary lock. The fifth and sixth conductive components of the indicating structure can be conductive fastening structures disposed within the slide lock or rotary lock, such as protrusions and / or grooves, and the cable interface of the target device can be correspondingly provided with grooves and / or protrusions. When the protrusion within the slide lock or rotary lock is engaged in the groove of the target device, and / or when the protrusion of the target device is engaged in the groove of the slide lock or rotary lock, the slide lock or rotary lock is in a locked state; otherwise, the slide lock or rotary lock is in an unlocked state.

[0265] The circuits and structures of the power supply equipment 110, the power receiving equipment 120, and the cable 130 in the power transmission system 100 have been described in detail above. Based on the above, the following describes how the power transmission system 100 achieves the function of hot-plug protection in conjunction with the changes in the circuits inside the equipment or cable during the plugging and unplugging process.

[0266] The cable 130 is connected to the power supply equipment 110 and the power receiving equipment 120 respectively, according to... Figure 3 When the electrical connection is as shown, in response to the user inserting or unplugging the cable 130 into or from the cable interface of the powered device 120, the voltage level signal of the contact point connecting the power supply device 110 or the powered device 120 to the cable 130 will change, and the electrical energy transmitted by the voltage bus will also change.

[0267] Figure 7 In the diagram, broken lines S1, S2, and S3 respectively represent the voltage levels of contact Pt11 and contact Pt12 of the power supply device 110, as well as the power transmission status of the voltage bus VBUS.

[0268] Regarding the order of electrical connection of power supply equipment 110, cable 130 and power receiving equipment 120, one possible case (case C1) is that cable 130 is first electrically connected to power receiving equipment 120 and then electrically connected to power supply equipment 110; another possible case (case C2) is that cable 130 is first electrically connected to power supply equipment 110 and then electrically connected to power receiving equipment 120; and yet another possible case is that cable 130 is electrically connected to both power supply equipment 110 and power receiving equipment 120 simultaneously.

[0269] In case C1, when cable 130 is not electrically connected to power supply equipment 110, contacts Pt11 and Pt12 are electrically connected to power supply Vp11 and power supply Vp12 respectively. The voltage level Vs1 of contact Pt11 is equal to the voltage level of power supply Vp11, and the voltage level Vs2 of contact Pt12 is equal to the voltage level of power supply Vp12. That is, Vs1 = Vp11, Vs2 = Vp12.

[0270] Based on case C1, in response to the electrical connection between power supply device 110 and cable 130, power supply device 110 is electrically connected to power receiving device 120. The contact Pt21 of power receiving device 120, already electrically connected to signal line CL1, is electrically connected to the contact Pt11 of power supply device 110. Since contact Pt21 is grounded, the voltage level of contact Pt11 drops. Referring to line S1, a falling edge appears between points P1 and P2. From the moment corresponding to point P2, the voltage level of contact Pt11 is equal to the voltage level of resistor Rd21 in power receiving device 120, i.e., at moment P2, V... S1 =V Rd21 .

[0271] It should be noted that after cable 130 is electrically connected to power supply device 110, contact Pt11 is electrically connected to signal line CL1, and the level of contact Pt11 can also be regarded as the level of signal line CL1.

[0272] To prevent the voltage level of contact Pt11 from dropping due to unforeseen factors, in some examples, the processing unit 112 of the power supply device 110 can continuously monitor the voltage level of contact Pt11 for a preset duration Tin. If the voltage level of contact Pt11 remains near the dropped level within the preset duration Tin, the processing unit 112 can determine that the powered device 120 is electrically connected to the power supply device 110, and can then begin supplying power to the powered device 120 via the voltage bus VBUS. This is reflected in the broken line S3, where the broken line S3 shows a rising edge at the time corresponding to point P3. In some scenarios, the aforementioned preset duration Tin can be referred to as the anti-jitter duration.

[0273] Continuing with reference to line S1, at the moment corresponding to point P4, in response to the user's operation, cable 130 is disconnected from power supply device 110 or power receiving device 120. In this case, contact Pt11 of power supply device 110 is disconnected from contact Pt21 of power receiving device 120, the level of contact Pt11 rises, and line S1 shows a rising edge between points P4 and P5.

[0274] Similarly, to prevent the level of Pt11 from rising due to accidental factors, in some examples, the processing unit 112 of the power supply device 110 can continuously detect the level of contact Pt11 within a preset duration Tout. If the level of contact Pt11 remains near the level after the rise within the preset duration Tout, the processing unit 112 can determine that the powered device 120 is disconnected from the power supply device 110. Then, starting from the moment corresponding to point P6, it reduces the power transmission power of the voltage bus VBUS or stops supplying power to the powered device 120. This is reflected in the broken line S3, where the broken line S3 shows a falling edge starting from the moment corresponding to point P6. In some scenarios, the aforementioned preset duration Tout can also be called the anti-jitter duration.

[0275] Based on case C1, in response to the electrical connection between the powered device 120 and the cable 130, the contact Pt12 of the power supply device 110 is electrically connected to the resistor Ra1 in the cable 130. Since the resistor Ra1 is grounded, the voltage level of contact Pt12 will drop. Referring to line S2, a falling edge appears between points P7 and P8. From the moment corresponding to point P8, the voltage level of contact Pt21 is equal to the voltage level of the resistor Ra1 in the cable 130, that is, at moment P8, V S2 =V Ra1 .

[0276] In some examples, the communication subunit of the processing unit 112 of the power supply device 110 receives an instruction to power the cable tag chip CM1 in the cable 130 at the time corresponding to point P9. The processing unit 112 can control the contact Pt12 to be electrically connected to the power supply Vcl12. Referring to the broken line S2, a rising edge appears between point P9 and point P10 on the broken line S2. The power supply device 110 starts to power the cable tag chip CM1 from the time corresponding to point P9.

[0277] As described above, power supply device 110 can adjust the power transmission power of the voltage bus VBUS at the time corresponding to point P6. One possibility is that power supply device 110 can simultaneously adjust the power transmission power of the voltage bus VBUS and stop supplying power to the cable tag chip CM1. Referring to line S2, power supply device 110 supplies power to the cable tag chip CM1 between the time corresponding to point P10 and the time corresponding to point P11.

[0278] Figure 8 In the diagram, broken lines S4, S5, and S6 respectively represent the voltage levels of contact Pt21 and contact Pt22 of the power receiving device 120, as well as the power transmission status of the voltage bus VBUS.

[0279] In scenario C2 above, where cable 130 is first electrically connected to power supply equipment 110 and then electrically connected to power receiving equipment 120, when cable 130 is not electrically connected to power receiving equipment 120, contacts Pt21 and Pt22 are electrically connected to resistors Rd21 and Rd22 respectively. Since resistors Rd21 and Rd22 are both grounded, contacts Pt21 and Pt22 are both at a low level.

[0280] Based on case C2, in response to the electrical connection between the powered device 120 and the cable 130, the powered device 120 is electrically connected to the power supply device 110. The contact Pt11 of the power supply device 110, already electrically connected to the signal line CL1, is electrically connected to the contact Pt21 of the powered device 120. Since contact Pt11 is electrically connected to the power supply Vp11, the voltage level at contact Pt21 will rise. Referring to line S4, a rising edge of the voltage level appears between points G1 and G2 on line S4.

[0281] It should be noted that after the cable 130 is electrically connected to the power receiving device 120, the contact Pt21 is electrically connected to the signal line CL1, and the level of the contact Pt21 can also be regarded as the level of the signal line CL1.

[0282] To prevent the voltage level of contact Pt21 from dropping due to unforeseen factors, in some examples, the processing unit 122 of the powered device 120 can continuously detect the voltage level of contact Pt21 for a preset duration Tin. If the voltage level of contact Pt21 remains near the level after the rise within the preset duration Tin, the processing unit 122 can determine that the power supply device 110 is electrically connected to the powered device 120, and can then start supplying power to the powered device 120 through the voltage bus VBUS. This is reflected in the broken line S6, where the rising edge of broken line S6 occurs at the time corresponding to point G3. In some scenarios, the aforementioned preset duration Tin can be referred to as the anti-jitter duration.

[0283] Continuing with line S4, at the moment corresponding to point G4, in response to the user's operation, cable 130 is disconnected from power supply device 110 or power receiving device 120. In this case, contact Pt11 of power supply device 110 is disconnected from contact Pt21 of power receiving device 120, and the voltage level of contact Pt21 drops. Line S4 shows a falling edge between points G4 and G5. When cable 130 is disconnected from power supply device 110 or power receiving device 120, power receiving device 120 no longer receives electrical energy transmitted via the voltage bus VBUS, and the electrical energy transmitted via the voltage bus VBUS is zero. Line S6 shows a falling edge starting from the moment corresponding to point G4.

[0284] In some examples, Figure 8 At the moment corresponding to the midpoint G3, the power receiving device 120 can determine that the power supply device 110 can supply power by detecting the presence of power input in the cable 130. After a duration T1 thereafter, the processing unit 122 of the power receiving device 120 can control the contact Pt22 to switch from being electrically connected to the resistor Rd22 to being electrically connected to the power supply Vp22. Since the resistor Rd22 is grounded, when the contact Pt22 switches to being electrically connected to the power supply Vp22, the level of the contact Pt22 rises, which is reflected in the broken line S5. In the broken line S5, starting from the moment corresponding to point G6 after a duration T1 following the moment corresponding to point G3, a rising edge of the level appears between point G6 and point G7.

[0285] After the voltage level rises at contact Pt22, the processing unit 122 of the powered device 120 can begin detecting whether it is electrically connected to the cable tag chip CM2 of the cable 130, for example, by detecting whether the resistance Ra2 can be detected. Referring to line S5, in some examples, the processing unit 122 of the powered device 120 can detect whether it is electrically connected to the cable tag chip CM2 within a time period T2 between points G7 and G8. If it is determined within time period T2 that it is electrically connected to the cable tag chip CM2, as an example, the processing unit 122 of the powered device 120 can obtain a command to power the cable tag chip CM2 at the time corresponding to point G8. The processing unit 122 can control contact Pt22 to be electrically connected to the power supply Vcl22. A rising edge of the voltage level appears between points G8 and G9 on line S5, and the powered device 120 starts powering the cable tag chip CM2 from the time corresponding to point G9.

[0286] In some examples, in response to the power receiving device 120 no longer receiving power from the voltage bus VBUS, the power receiving device 120 can stop supplying power to the cable tag chip CM2, which is reflected in the broken line S5, where the broken line S5 shows a falling edge of the level starting from the moment corresponding to point G4.

[0287] In a hot-swap scenario, the power supply device 110 and the power receiving device 120 in the power transmission system 100 can determine whether the cable 130 is separated from the power supply device 110 or the power receiving device 120 by detecting the aforementioned separation signal.

[0288] For example, the power supply device 110 can periodically detect the level of node A. When the level of node A is detected to be near W0 in the aforementioned example, the power supply device 110 can determine that the cable 130 is disconnected from the power supply device 110. When the level of node A is detected to be W1 in the aforementioned example, the power supply device 110 can determine that the cable 130 is physically connected to the power supply device 110.

[0289] One possible scenario is that W0 is high and W1 is low. This can also be understood as follows: when power supply device 110 detects node A as high, it determines that cable 130 is disconnected from power supply device 110; when power supply device 110 detects node A as low, it determines that cable 130 is physically connected to power supply device 110. In this case, the aforementioned connection signal SCNT_Good can indicate that node A is low, and the aforementioned disconnection signal SCNT_Bad can indicate that node A is high.

[0290] For example, the powered device 120 can periodically detect the level of node B. When the level of node B is detected to be near Q0 in the aforementioned example, the powered device 120 can determine that the cable 130 is disconnected from the powered device 120. When the level of node B is detected to be Q1 in the aforementioned example, the powered device 120 can determine that the cable 130 is physically connected to the powered device 120.

[0291] One possible scenario is that Q0 is high and Q1 is low. This scheme can also be understood as follows: when the powered device 120 detects that node B is high, it determines that cable 130 is disconnected from the powered device 120; when the powered device 120 detects that node B is low, it determines that cable 130 is physically connected to the powered device 120. In this case, the aforementioned connection signal WCNT_Good can indicate that node B is low, and the aforementioned disconnection signal WCNT_Bad can indicate that node B is high.

[0292] In some examples, the power supply device 110 and the power receiving device 120 can also determine whether to perform power transmission by determining whether the aforementioned connection signal is detected.

[0293] For example, when cable 130 is electrically connected to power supply device 110 and powered device 120 respectively, power supply device 110 and powered device 120 can supply power to cable tag chip CM1 and cable tag chip CM2 in cable 130 respectively. Based on this, before power supply device 110 supplies power to powered device 120, powered device 120 can determine whether it can detect a connection signal. Powered device 120 can also communicate with power supply device 110 via cable 130, for example, via signal line CL1 in cable 130, to determine whether power supply device 110 can detect a connection signal. Alternatively, power supply device 110 can determine whether it can detect a connection signal and determine whether powered device 120 can detect a connection signal by communicating with powered device 120 (e.g., via signal line CL1 in cable 130). If it is determined that both the receiving device 120 and the power supply device 110 can detect the connection signal, power can be transmitted between the power supply device 110 and the receiving device 120, for example, high-power power transmission.

[0294] As an example and not a limitation, if it is determined that both the power supply device 110 and the power receiving device 120 can detect the connection signal, the power supply device 110, the power receiving device 120 and the cable 130 can further communicate to determine the power supply provided by the power supply device 110 to the power receiving device 120.

[0295] In some examples, during the process of power supply device 110 supplying power to power receiving device 120, power supply device 110 and power receiving device 120 can continue to detect the aforementioned connection signal or separation signal. If a separation signal is detected at the power supply device 110 end or the power receiving device 120 end, it is determined that cable 130 is separated from power supply device 110 or power receiving device 120. Then, power supply device 110 can perform protective measures such as reducing or shutting down power output, and power receiving device 120 can also issue a prompt message to remind the user to save data, thereby reducing the probability of safety accidents during the actual process of unplugging cable 130 from the cable interface of power supply device 110 or power receiving device 120, and improving the electrical safety of power supply device 110 and power receiving device 120.

[0296] Figure 9 The diagram shown is a schematic of another power transmission system 200 provided in the embodiment of this application. The power transmission system 200 may include a power supply device 210, a power receiving device 220 and a cable 230. The two ends of the cable 230 may be electrically connected to the power supply device 210 and the power receiving device 220 respectively. The power supply device 210 can supply power to the power receiving device 220 through the cable 230.

[0297] Figure 10The diagram shows a power supply device 210 in the power transmission system 200. The physical layer, protocol layer and other related components of the power supply device 210 are not shown in the diagram.

[0298] Power supply device 210 may include contacts Pt11 and Pt12, combined with Figure 9 and Figure 10 Contacts Pt11 and Pt12 can be used for electrical connection with cable 230.

[0299] In some examples, the power supply device 210 may include a power supply Vp11 and a power supply Vcl11, and the aforementioned contact Pt11 may be electrically connected to either power supply Vp11 or power supply Vcl11. Exemplarily, a resistor Rp11 may be provided on the connection line between power supply Vp11 and contact Pt11, and power supply Vcl11 may be grounded. In some scenarios, resistor Rp11 may also be referred to as a pull-up resistor.

[0300] In some examples, the power supply device 210 may include a power supply Vp12 and a power supply Vcl12, and the aforementioned contact Pt12 may be electrically connected to either power supply Vp12 or power supply Vcl12. Exemplarily, a resistor Rp12 may be provided on the connection line between power supply Vp12 and contact Pt12, and power supply Vcl12 may be grounded. In some scenarios, resistor Rp12 may also be referred to as a pull-up resistor.

[0301] In some examples, the power supply device 210 may also be provided with a processing unit 212, which may be used to detect the status of the internal circuit of the power supply device 210 (e.g., the level of the nodes in the circuit), and may also be used to control one or more electronic components within the power supply device 210.

[0302] In some examples, the processing unit 212 within the power supply device 210 can be used to detect the voltage levels of contact Pt11 and contact Pt12.

[0303] For example, continue to refer to Figure 10 Processing unit 212 and contact Pt11 can be connected to node Ct11, with node Ct11 located on the connection line between contact Pt11 and power supply Vp11, closer to contact Pt11. Similarly, processing unit 212 and contact Pt12 can be connected to node Ct12, with node Ct12 located on the connection line between contact Pt12 and power supply Vp12, closer to contact Pt12.

[0304] One possibility is that the processing unit 212 can determine whether the power supply device 210 is electrically connected to the power receiving device 220 via the cable 230 by detecting the level and / or level change of the contact Pt11.

[0305] Another possibility is that the processing unit 212 can also determine whether the power supply device 210 is electrically connected to the power receiving device 220 via the cable 230 by detecting the level and / or level change of the contact Pt12.

[0306] One possibility is that the processing unit 212 can determine whether the cable 230 is electrically connected to the power supply device 210 by detecting the level and / or level changes of the contact Pt12.

[0307] Another possibility is that the processing unit 212 can determine whether the cable 230 is electrically connected to the power supply device 210 by detecting the level and / or level change of the contact Pt11.

[0308] It should be noted that when the powered device 220 is detected to be electrically connected to the power supply device 210, the processing unit 212 can also determine that the cable 230 is electrically connected to the power supply device 210. In the above example, the determination of whether the cable 230 is electrically connected to the power supply device 210 is made by detecting the level and / or level change of the contact Pt11 or the contact Pt12. This can also be understood as determining whether the internal electronic components (e.g., cable tag chip) of the cable 230 are electrically connected to the power supply device 210 by detecting the level and / or level change of the contact Pt11 or the contact Pt12.

[0309] For details on how the processing unit 212 determines the electrical connection between the power supply device 210 and the cable 230 or the power receiving device 220 by detecting the level of the contact, please refer to the relevant descriptions of the processing unit 112 above, which will not be repeated here.

[0310] In some examples, the aforementioned processing unit 212 may include a transmitting subunit and a receiving subunit, or in other words, the processing unit 212 may include a communication subunit. The transmitting subunit or communication subunit may be used to send information to the cable 230 or the powered device 220, and the receiving subunit or communication subunit may be used to receive information from the cable 230 or the powered device 220.

[0311] For example, the processing unit 212 can interact with the cable 230 and the powered device 220 through the communication subunit to determine information such as the output power when the power supply device 210 supplies power to the powered device 220.

[0312] In some examples, continue to refer to Figure 10 The power supply equipment 210 may also be equipped with a single-pole double-throw switch Sw11 and a single-pole double-throw switch Sw12. The single-pole double-throw switch Sw11 can be used to connect the contact point Pt11 to the power supply Vp11 or the power supply Vcl11, and the single-pole double-throw switch Sw12 can be used to connect the contact point Pt12 to the power supply Vp12 or the power supply Vcl12.

[0313] In some examples, the power supply device 210 may also be equipped with a first switch, a second switch, a third switch, and a fourth switch. The first and second switches can be used to implement the function of the aforementioned single-pole double-throw switch Sw11, while the third and fourth switches can be used to implement the function of the aforementioned single-pole double-throw switch Sw12.

[0314] The above-mentioned introductions to single-pole double-throw switches and first switches can be found in [reference needed]. Figure 4 The relevant information about the power supply equipment 110 shown will not be elaborated here.

[0315] The aforementioned processing unit 212 can also be used to control the aforementioned single-pole double-throw switch or first switch to realize the electrical connection between the contacts and different power sources. The relevant control methods can be executed with reference to the content of the processing unit 112 controlling the state of the single-pole double-throw switch, which will not be elaborated here.

[0316] To simplify the circuit structure of the power supply device 210, in some examples, power supply Vcl11 and power supply Vcl12 in the power supply device 210 can be the same power supply. Similarly, power supply Vp11 and power supply Vp12 can be the same power supply.

[0317] In some examples, the processing unit 212 can also determine whether the power supply device 210 is disconnected from the cable 230 by detecting the level and / or level change of the contact Pt11, or in other words, detect whether a disconnection signal is generated.

[0318] For example, when the power supply device 210 is electrically connected to the power receiving device 220 via cable 230, the voltage level of the power supply device 210's contact Pt11 will decrease because the contact Pt21 of the power receiving device 220 is grounded. During the process of unplugging the cable 230 from the cable interface of the power supply device 210, contacts Pt11 and Pt12 may short-circuit. In this case, the voltage level of contact Pt11 will increase. If the voltage level of contact Pt11 is detected to rise to a preset value, and / or the rise in voltage level of contact Pt11 is greater than or equal to a preset value, the processing unit 212 can determine that the power supply device 210 is disconnected from the cable 230.

[0319] Similarly, the processing unit 212 can also determine whether the power supply device 210 is disconnected from the cable 230 by detecting the level and / or level change of the contact Pt11, or in other words, detect whether a disconnection signal is generated.

[0320] For example, when the power supply device 210 is electrically connected to the power receiving device 220 via cable 230, the voltage level of the power supply device 210's contact Pt12 will decrease because the contact Pt22 of the power receiving device 220 is grounded. During the process of unplugging the cable 230 from the cable interface of the power supply device 210, contacts Pt11 and Pt12 may short-circuit. In this case, the voltage level of contact Pt12 will increase. If the voltage level of contact Pt12 is detected to rise to a preset value, and / or the rise in voltage level of contact Pt12 is greater than or equal to a preset value, the processing unit 212 can determine that the power supply device 210 is disconnected from the cable 230.

[0321] Figure 11 The diagram shows a power receiving device 220 in a power transmission system 200. The physical layer, protocol layer and other related components of the power receiving device 220 are not shown in the diagram.

[0322] The power receiving device 220 may include contacts Pt21 and Pt22, combined with Figure 9 and Figure 11 Contacts Pt21 and Pt22 can be used for electrical connection with cable 230.

[0323] In some examples, contact Pt21 can be grounded through resistor Rd21, which can also be called a pull-down resistor in some scenarios.

[0324] In some examples, the powered device 220 may include power supplies Vp21 and Vcl21, and the aforementioned contact Pt21 may be electrically connected to either power supply Vp21 or power supply Vcl21. Exemplarily, a resistor Rp21 may be provided on the connection line between power supply Vp21 and contact Pt21, and power supply Vcl21 may be grounded. In some scenarios, resistor Rp21 may also be referred to as a pull-up resistor.

[0325] In some examples, contact Pt22 can be grounded through resistor Rd22, which can also be referred to as a pull-down resistor in some scenarios.

[0326] In some examples, the powered device 220 may include power supplies Vp22 and Vcl22, and the aforementioned contact Pt22 may be electrically connected to either power supply Vp22 or power supply Vcl22. For example, a resistor Rp22 may be provided on the connection line between power supply Vp22 and contact Pt22, and power supply Vcl22 may be grounded. In some scenarios, resistor Rp22 may also be referred to as a pull-up resistor.

[0327] In some examples, the powered device 220 may also be provided with a processing unit 222, which may be used to detect the status of the internal circuit of the powered device 220 (e.g., the level of the nodes in the circuit), and may also be used to control one or more electronic components within the powered device 220.

[0328] In some examples, the processing unit 222 within the powered device 220 can be used to detect the voltage levels of contact Pt21 and contact Pt22.

[0329] For example, continue to refer to Figure 11 Processing unit 222 and contact Pt21 can be connected to node Ct21. Node Ct21 is located on the connection line between contact Pt21 and power supply Vp21, closer to contact Pt21. Node Ct21 is also located between contact Pt21 and resistor Rd21. Similarly, processing unit 222 and contact Pt22 can be connected to node Ct22. Node Ct22 is located on the connection line between contact Pt22 and power supply Vp22, closer to contact Pt22. Node Ct22 is also located between contact Pt22 and resistor Rd22.

[0330] One possibility is that the processing unit 222 can determine whether the power supply device 210 is electrically connected to the power receiving device 220 via the cable 230 by detecting the level and / or level change of the contact Pt21.

[0331] Another possibility is that the processing unit 222 can also determine whether the power supply device 210 is electrically connected to the power receiving device 220 via the cable 230 by detecting the level and / or level change of the contact Pt22.

[0332] One possibility is that the processing unit 222 can determine whether the cable 230 is electrically connected to the powered device 220 by detecting the level and / or level changes of the contact Pt22.

[0333] Another possibility is that the processing unit 222 can determine whether the cable 230 is electrically connected to the powered device 220 by detecting the level and / or level change of the contact Pt21.

[0334] It should be noted that when the power supply device 210 is detected to be electrically connected to the power receiving device 220, the processing unit 222 can also determine that the cable 230 is electrically connected to the power receiving device 220. In the above example, the determination of whether the cable 230 is electrically connected to the power receiving device 220 is made by detecting the level and / or level change of the contact Pt21 or the contact Pt22. This can also be understood as determining whether the internal electronic components (e.g., cable tag chip) of the cable 230 are electrically connected to the power receiving device 220 by detecting the level and / or level change of the contact Pt21 or the contact Pt22.

[0335] For details on how the processing unit 212 determines the electrical connection between the powered device 220 and the cable 230 or the power supply device 210 by detecting the level of the contact, please refer to the relevant description of the processing unit 122 above, which will not be repeated here.

[0336] In some examples, the aforementioned processing unit 222 may include a transmitting subunit and a receiving subunit, or in other words, the processing unit 222 may include a communication subunit. The transmitting subunit or communication subunit may be used to send information to the cable 230 or the power supply device 210, and the receiving subunit or communication subunit may be used to receive information from the cable 230 or the power supply device 210.

[0337] For example, the processing unit 222 can interact with the cable 230 and the power supply device 210 through the communication subunit to determine information such as the output power of the power supply device 210 when it supplies power to the powered device 220.

[0338] In some examples, the power receiving device 220 may also be equipped with a first single-pole three-throw switch and a second single-pole three-throw switch. The first single-pole three-throw switch is used to connect contact point Pt21 to power supply Vp21, power supply Vcl21, or resistor Rd21. The second single-pole three-throw switch is used to connect contact point Pt22 to power supply Vp22, power supply Vcl22, or resistor Rd22.

[0339] In some examples, the power receiving device 220 may also be equipped with switches Sw21-1, Sw21-2, Sw21-3, Sw22-1, Sw22-2, and Sw22-3. Switches Sw21-1, Sw21-2, and Sw21-3 can be used to implement the function of the aforementioned first single-pole three-throw switch, while switches Sw22-1, Sw22-2, and Sw22-3 can be used to implement the function of the aforementioned second single-pole three-throw switch.

[0340] For more information on the above-mentioned single-pole three-throw switch and switch Sw21-1, please refer to [link / reference]. Figure 5 The relevant information about the power receiving device 120 shown will not be elaborated here.

[0341] The aforementioned processing unit 222 can also be used to control the aforementioned first single-pole three-throw switch or switch Sw21-1, etc. The relevant control methods can be executed with reference to the content of the processing unit 122 controlling the state of the single-pole three-throw switch, which will not be elaborated here.

[0342] To simplify the circuit structure of the powered device 220, in some examples, power supplies Vcl21 and Vcl22 in the powered device 220 can be the same power supply. Similarly, power supplies Vp21 and Vp22 can be the same power supply.

[0343] In some examples, the processing unit 222 can also determine whether the powered device 220 is disconnected from the cable 230 by detecting the level and / or level change of the contact Pt21, or in other words, detect whether a disconnection signal is generated.

[0344] For example, when the powered device 220 is electrically connected to the power supply device 210 via cable 230, since the contact Pt21 of the powered device 220 is grounded and the contact Pt11 of the power supply device 210 is at a high level, the level of the contact Pt21 of the powered device 220 will rise. During the process of unplugging the cable 230 from the cable interface of the powered device 220, the contacts Pt21 and Pt22 may be short-circuited. In this case, since the contact Pt22 is generally electrically connected to the power supply Vcl22 at this time, after short-circuiting the contact Pt22, the level of the contact Pt21 will rise. When the level of the contact Pt21 is detected to rise to a preset value, and / or the rise of the level of the contact Pt21 is greater than or equal to the preset value, the processing unit 222 can determine that the powered device 220 is separated from the cable 230.

[0345] Similarly, the processing unit 222 can also determine whether the powered device 220 is disconnected from the cable 230 by detecting the level and / or level change of the contact Pt22, or in other words, detect whether a disconnection signal is generated.

[0346] For example, when the powered device 220 is electrically connected to the power supply device 210 via cable 230, since the contact Pt22 of the powered device 220 is grounded and the contact Pt12 of the power supply device 210 is at a high level, the level of the contact Pt22 of the powered device 220 will rise. During the process of unplugging the cable 230 from the cable interface of the powered device 220, contacts Pt21 and Pt22 may be short-circuited. In this case, since contact Pt21 is generally electrically connected to the power supply Vcl21 at this time, after short-circuiting contact Pt21, the level of contact Pt22 will rise. When the level of contact Pt22 is detected to rise to a preset value, and / or the rise in the level of contact Pt22 is greater than or equal to the preset value, the processing unit 222 can determine that the powered device 220 is separated from the cable 230.

[0347] Figure 12 The diagram shows a cable 230 in the power transmission system 200. The cable 230 includes an indicator structure that can be used to trigger the generation of the aforementioned separation signal. This separation signal indicates that the cable 230 is about to disconnect from the power supply device 210 (or the power receiving device 220) or has already disconnected physically. In some scenarios, the power supply device 210 or the power receiving device 220 connected to the cable 230 can both be referred to as the target device.

[0348] Cable 230 may include cable tag chip CM1, cable tag chip CM2, signal line CL1, signal line CL2a and signal line CL2b, and voltage bus VBUS. For details on these electronic components and connecting lines, please refer to the previous text. Figure 2 Some related explanations will not be repeated here.

[0349] In some examples, cable 230 may include contacts Pt31a, Pt31b, Pt32a, and Pt32b, wherein contacts Pt31a and Pt31b are located at the same end of cable 230 (e.g., referred to as end A), and contacts Pt31b and Pt32b may be located at the other end of cable 230 (e.g., referred to as end B). Contacts Pt31a and Pt31b may be connected to one of the power supply device 210 and the power receiving device 220, while contacts Pt31b and Pt32b may be connected to the other device.

[0350] As an example, refer to Figure 9 End A of cable 230 is electrically connected to power supply equipment 210, and end B of cable 230 is electrically connected to power receiving equipment 220. Specifically, contacts Pt31a and Pt32a at end A of cable 230 are electrically connected to contacts Pt11 and Pt12 of power supply equipment 210, respectively, and contacts Pt31b and Pt32b at end B of cable are electrically connected to contacts Pt21 and Pt22 of power receiving equipment 220, respectively.

[0351] For example, contact Pt31a can be electrically connected to contact Pt31b via signal line CL1. When cable 230 is electrically connected to power supply device 210 and power receiving device 220 respectively, signal line CL1 can be used for communication between cable 230 and power supply device 210, cable 230 and power receiving device 220, and power supply device 210 and power receiving device 220.

[0352] For example, contact Pt32a can be electrically connected to cable tag chip CM1 via signal line CL2a, and contact Pt32b can be electrically connected to cable tag chip CM2 via signal line CL2b. When end A of the cable is electrically connected to power supply device 210 and end B of the cable is electrically connected to power receiving device 220, power supply device 210 can supply power to cable tag chip CM1 via signal line CL2a, and power receiving device 220 can supply power to cable tag chip CM2 via signal line CL2b.

[0353] In some examples, cable 230 may also include resistors Ra1 and Ra2, with one end of resistor Ra1 electrically connected to contact Pt32a and the other end grounded; one end of resistor Ra2 is electrically connected to contact Pt32b and the other end grounded. In some scenarios, both resistors Ra1 and Ra2 can be referred to as pull-down resistors.

[0354] In one possible implementation, both the power supply device 210 and the power receiving device 220 can determine whether they are electrically connected to the cable 230 by detecting whether they are electrically connected to resistor Ra1 or resistor Ra2.

[0355] The method by which the processing unit 112 in the power supply equipment 210 detects whether it is electrically connected to the cable 230 by detecting the level of the contact Pt11 or the contact Pt12 is essentially based on the fact that after the contact Pt11 or the contact Pt12 is electrically connected to the contact Pt32a in the cable 230, the level of the contact Pt11 or the contact Pt12 will change due to the influence of the resistor Ra1 or the resistor Ra2.

[0356] In order to detect an event that the cable 230 is about to be pulled out before it is pulled out of the cable interface of the device, an indicator structure may be provided inside the cable 230, which can be used to trigger the generation of the aforementioned separation signal.

[0357] For example, the indicating structure may include structure Cp1 and / or structure Cp2, wherein structure Cp1 can be used to realize the electrical connection between signal line CL1 and signal line CL2a, and structure Cp2 can be used to realize the electrical connection between signal line CL1 and signal line CL2b.

[0358] For example, when structural component Cp1 is in the first state, structural component Cp1 can electrically connect signal line CL1 and signal line CL2a; when structural component Cp1 is not in the first state, structural component Cp1 disconnects the electrical connection between signal line CL1 and signal line CL2a.

[0359] For example, when structural component Cp2 is in the first state, structural component Cp2 can electrically connect signal line CL1 and signal line CL2b; when structural component Cp2 is not in the first state, structural component Cp2 disconnects the electrical connection between signal line CL1 and signal line CL2b.

[0360] Figure 13 An exemplary structural schematic diagram of a structural component Cp1 is provided. The structural component Cp1 includes a first pressing piece 232A and a second pressing piece 232B. The first pressing piece 232A and the second pressing piece 232B are arranged opposite to each other and spaced apart. One end of the first pressing piece 232A and the second pressing piece 232B are fixedly connected by a connecting part 233.

[0361] In some examples, the inner wall of the first pressing piece 232A, away from the connecting portion 233, may be provided with a connecting contact point 235A, and the inner wall of the second pressing piece 232B, away from the connecting portion 233, may be provided with a connecting contact point 235B. The connecting contact points 235A and 235B are arranged opposite to each other and spaced apart. The connecting contact points 235A and 235B can be used to connect signal line CL1 or signal line CL2a, respectively. When the connecting contact points 235A and 235B are in contact, signal line CL1 and signal line CL2a are electrically connected. When the connecting contact points 235A and 235B are separated, signal line CL1 and signal line CL2a are disconnected from electrical connection.

[0362] In some examples, the outer wall of the first pressing piece 232A may be provided with a protrusion structure 234A, and the outer wall of the second pressing piece 232B may be provided with a protrusion structure 234B. Exemplarily, the distance between the side of the protrusion structure 234A away from the outer wall of the first pressing piece 232A and the side of the protrusion structure 234B away from the outer wall of the second pressing piece 232B can be L1, or in other words, the farthest distance between the outer walls of the first pressing piece 232A and the second pressing piece 232B can be L1. The distance between the area of ​​the outer wall of the first pressing piece 232A excluding the area near the aforementioned protrusion structure 234A and the area of ​​the outer wall of the second pressing piece 232B excluding the area near the aforementioned protrusion structure 234B can be L2. Generally, L2 is less than L1.

[0363] The distance between the inner walls of the cable interface of the power supply device 210 can be L0. When L1 is less than or equal to L0, the structural component Cp1 can be inserted into the cable interface of the power supply device 210, and the structural component Cp1 can also be pulled out of the cable interface of the power supply device 210. In other words, in this case, the structural component Cp1 can be in an unlocked state. Conversely, when L1 is greater than L0, the structural component Cp1 cannot be inserted into or pulled out of the cable interface. In this case, the structural component Cp1 can be in a locked state.

[0364] In one possible implementation, when structural component Cp1 is in a locked state, the aforementioned L0, L1, and L2 satisfy the following condition: L2 < L0 < L1.

[0365] In some examples, both the first pressing piece 232A and the second pressing piece 232B can be made of an elastic material, or in other words, the elastic modulus of the first pressing piece 232A and the second pressing piece 232B can be greater than or equal to a preset threshold. Thus, when an external force is applied to the end of the first pressing piece 232A away from the connecting portion 233, and / or when an external force is applied to the end of the second pressing piece 232B away from the connecting portion 233, the first pressing piece 232A and the second pressing piece 232B can approach each other, the aforementioned connecting contact points 235A and 235B can approach each other, and the aforementioned protruding structures 234A and 234B can also approach each other.

[0366] For example, during the pressing of the first pressing piece 232A and / or the second pressing piece 232B, the connecting contact points 235A and 235B can first make contact with each other, that is, the signal line CL1 and the signal line CL2a can first be electrically connected. Afterwards, if the first pressing piece 232A and / or the second pressing piece 232B are pressed further, the distance L1 between the protruding structures 234A and 234B can be reduced to less than L0, thereby allowing the structural component Cp1 to be in an unlocked state, and the cable 230 to be pulled out from the cable interface.

[0367] In some scenarios, structural component Cp1 can also be referred to as a latch, and the pressing tab of structural component Cp1 can also be referred to as a pressing tongue. In other words, when the pressing tab of structural component Cp1 is pressed, structural component Cp1 can be in the unlocked state.

[0368] The structure of structural component Cp2 can be similar to that of structural component Cp1. For related information, please refer to the aforementioned introduction of structural component Cp1.

[0369] The circuits and structures of the power supply equipment 210, the power receiving equipment 220, and the cable 130 in the power transmission system 200 have been described in detail above. Based on the above, the following describes how the power transmission system 200 achieves the function of hot-plug protection in conjunction with the changes in the circuits inside the equipment or cable during the plugging and unplugging process.

[0370] The cable 230 is connected to the power supply equipment 210 and the power receiving equipment 220 respectively according to the following... Figure 9 When the electrical connection is as shown, in response to the user inserting or unplugging the cable 230 into or from the cable interface of the powered device 220, the voltage level signal of the contact point connecting the power supply device 210 or the powered device 220 to the cable 230 will change to a certain extent, and the voltage bus transmission of electrical energy will also change to a certain extent.

[0371] Regarding the insertion of cable 230 into power supply device 210 or power receiving device 220, the changes in the voltage level of the contacts of power supply device 210, the changes in the voltage level of contacts of power receiving device 220, and the changes in the power transmission of the voltage bus within cable 230, this part is related to the previous text. Figure 7 and Figure 8 The relevant content is similar, and you can refer to the above content for details, which will not be repeated here.

[0372] In some examples, the indicator structure included in the cable 230 may also be located at the cable interface of the power supply device 210 or the cable interface of the power receiving device 220. In other words, the power supply device 210 and / or the power receiving device 220 may also include a structure that can both trigger the generation of the aforementioned separation signal and be used to achieve a physical connection between the cable 230 and itself.

[0373] Figure 14 In the diagram, broken lines S7, S8, and S9 respectively represent the voltage levels of contact Pt11 and contact Pt12 of the power supply device 210, as well as the power transmission status of the voltage bus VBUS.

[0374] During the electrical connection process between the power supply equipment 210, cable 230, and power receiving equipment 220, one possible scenario is that cable 230 is first electrically connected to power receiving equipment 220, and then electrically connected to power supply equipment 210. Figure 14 This case will be used as an example for illustration.

[0375] When cable 230 is not electrically connected to power supply equipment 210, contacts Pt11 and Pt12 are electrically connected to power supply Vp11 and power supply Vp12 respectively. The voltage level Vs7 of contact Pt11 is equal to the voltage level of power supply Vp11, and the voltage level Vs8 of contact Pt12 is equal to the voltage level of power supply Vp12. That is, Vs7 = Vp11, Vs8 = Vp12.

[0376] Referring to line S7, in response to the electrical connection between the powered device 220 and cable 230, the power supply device 210 is electrically connected to the powered device 220. The contact Pt11 of the power supply device 210 is electrically connected to the contact Pt21 of the powered device 220. Since contact Pt21 is grounded, the voltage level of contact Pt11 drops, and a falling edge appears on line S7 between points H1 and H2.

[0377] In some examples, the processing unit 212 of the power supply device 210 can continuously detect the level of contact Pt11 within a preset duration Tin. If the level of contact Pt11 remains near the fallen level within the preset duration Tin, the processing unit 212 can determine that the powered device 220 is electrically connected to the power supply device 210, and can then start supplying power to the powered device 220 through the voltage bus VBUS. This is reflected in the broken line S9, where the broken line S9 shows a rising edge from the time corresponding to point H3. In some scenarios, the aforementioned preset duration Tin can be referred to as the anti-jitter duration.

[0378] Referring to line S8, in response to the electrical connection between cable 230 and power supply device 210, contact Pt12 of power supply device 210 is electrically connected to resistor Ra1 in cable 230. Since resistor Ra1 is grounded, the level of contact Pt12 will drop, and a falling edge of the level will appear between point J1 and point J2 in line S8.

[0379] In some examples, the communication subunit of the processing unit 212 of the power supply device 210 receives an instruction to power the cable tag chip CM1 in the cable 230 at the time corresponding to point J3. The processing unit 212 can control the contact Pt12 to be electrically connected to the power supply Vcl12. Referring to the broken line S8, a rising edge of the level appears between point J3 and point J4 on the broken line S8. The power supply device 210 starts to power the cable tag chip CM1 from the time corresponding to point J3.

[0380] Continuing with reference to line S7, in response to the user pressing the pressing tab of the aforementioned structural component Cp1 and / or structural component Cp2, signal line CL1 is electrically connected to signal line CL2a (or signal line CL2b), and contacts Pt11 and Pt12 in the power supply device 210 are shorted. Since contact Pt12 is electrically connected to the power supply Vcl12 and is at a high level, after contact Pt11 and contact Pt12 are shorted, the level of contact Pt11 will rise, and a rising edge of the level will appear between points H4 and H5 on line S7.

[0381] In some examples, the processing unit 212 of the power supply device 210 can continuously detect the level of contact Pt11 within a preset duration Tout. If the level of contact Pt11 remains near the level after the rise within the preset duration Tout, the processing unit 212 can determine that the user intends to disconnect the electrical connection between the power supply device 210 and the powered device 220. Therefore, starting from the moment corresponding to point H6, it reduces the power transmission power of the voltage bus VBUS or stops supplying power to the powered device 220. The power supply device 210 can also stop supplying power to the cable chip CM1 of the cable 230 starting from the moment corresponding to point H6. Reflected in broken lines S8 and S9, a falling edge appears between points J5 and J6 in broken line S8, and a falling edge appears on broken line S9 starting from the moment corresponding to point H6. In some scenarios, the aforementioned preset duration Tout can also be called the anti-jitter duration.

[0382] In response to the power supply device 210 stopping power supply to the cable chip CM1, contact Pt12 is no longer at a high level. Consequently, the level of contact Pt11, which is shorted to contact Pt12, drops. Referring to line S7, a falling edge appears between points H6 and H7. After a certain period (the time interval between points H7 and H8), cable 230 is unplugged from the cable interface of power supply device 210 (i.e., power supply device 210 and cable 230 are physically disconnected) or unplugged from the cable interface of powered device 220 (i.e., cable 230 and powered device 220 are physically disconnected). Contact Pt11 of power supply device 210 disconnects from contact Pt21 of powered device 220, and the level of contact Pt11 rises. Referring to line S7, a rising edge appears between points H8 and H9.

[0383] In response to the power supply device 210 ceasing to supply power to the cable chip CM1, the voltage level at contact Pt12 will drop, and a falling edge will appear between points J5 and J6 in line S8. If it is determined that the power supply device 210 has lost its physical connection with the power receiver 220, the internal circuitry of the power supply device 210 can return to its default state; for example, contact Pt12 will be electrically connected to power supply Vp12, and a rising edge will appear between points J7 and J8 in line S8.

[0384] As described above, power supply device 210 shuts down or reduces the power transmission of the voltage bus VBUS at point H6, and only then (at point H8) does cable 230 disconnect from the cable interface. In other words, before the user disconnects cable 230, the power transmission power of the voltage bus VBUS is already within a relatively safe range, greatly reducing the probability of arcing or other safety incidents when the user disconnects cable 230.

[0385] Figure 15The diagram shown is a schematic of a power transmission system 300 provided in an embodiment of this application. The power transmission system 300 may include a power supply device 310, a power receiving device 320 and a cable 330. The two ends of the cable 330 may be electrically connected to the power supply device 310 and the power receiving device 320 respectively. The power supply device 310 can supply power to the power receiving device 320 through the cable 330.

[0386] Figure 16 The diagram shows a power supply device 310 in the power transmission system 300. The physical layer, protocol layer and other related components of the power supply device 310 are not shown in the diagram.

[0387] The power supply device 310 may include contacts Pt11 and Pt12, combined with Figure 15 and Figure 16 Contacts Pt11 and Pt12 can be used for electrical connection with cable 330.

[0388] In some examples, the power supply device 310 may include a power supply Vp11 and a power supply Vcl11, and the aforementioned contact Pt11 may be electrically connected to either power supply Vp11 or power supply Vcl11. Exemplarily, a resistor Rp11 may be provided on the connection line between power supply Vp11 and contact Pt11, and power supply Vcl11 may be grounded. In some scenarios, resistor Rp11 may also be referred to as a pull-up resistor.

[0389] In some examples, the power supply device 310 may include a power supply Vp12 and a power supply Vcl12, and the aforementioned contact Pt12 may be electrically connected to either power supply Vp12 or power supply Vcl12. Exemplarily, a resistor Rp12 may be provided on the connection line between power supply Vp12 and contact Pt12, and power supply Vcl12 may be grounded. In some scenarios, resistor Rp12 may also be referred to as a pull-up resistor.

[0390] In some examples, the power supply device 310 may also be provided with a processing unit 312, which may be used to detect the internal circuit status of the power supply device 310 (e.g., the level of nodes in the circuit), and may also be used to control one or more electronic components within the power supply device 310.

[0391] In some examples, the processing unit 312 within the power supply device 310 can be used to detect the voltage levels of contact Pt11 and contact Pt12.

[0392] For example, continue to refer to Figure 16Processing unit 312 and contact Pt11 can be connected to node Ct11, with node Ct11 located on the connection line between contact Pt11 and power supply Vp11, closer to contact Pt11. Similarly, processing unit 312 and contact Pt12 can be connected to node Ct12, with node Ct12 located on the connection line between contact Pt12 and power supply Vp12, closer to contact Pt12.

[0393] One possibility is that the processing unit 312 can determine whether the power supply device 310 is electrically connected to the power receiving device 320 via the cable 330 by detecting the level and / or level change of the contact Pt11.

[0394] Another possibility is that the processing unit 312 can also determine whether the power supply device 310 is electrically connected to the power receiving device 320 via the cable 330 by detecting the level and / or level change of the contact Pt12.

[0395] One possibility is that the processing unit 312 can determine whether the cable 330 is electrically connected to the power supply device 310 by detecting the level and / or level changes of the contact Pt12.

[0396] Another possibility is that the processing unit 312 can determine whether the cable 330 is electrically connected to the power supply device 310 by detecting the level and / or level change of the contact Pt11.

[0397] It should be noted that when the powered device 320 is detected to be electrically connected to the power supply device 310, the processing unit 312 can also determine that the cable 330 is electrically connected to the power supply device 310. In the above example, the determination of whether the cable 330 is electrically connected to the power supply device 310 is made by detecting the level and / or level change of the contact Pt11 or the contact Pt12. This can also be understood as determining whether the internal electronic components (e.g., cable tag chip) of the cable 330 are electrically connected to the power supply device 310 by detecting the level and / or level change of the contact Pt11 or the contact Pt12.

[0398] For details on how the processing unit 312 determines the electrical connection between the power supply device 310 and the cable 330 or the power receiving device 320 by detecting the level of the contact, please refer to the relevant description of the processing unit 112 above, which will not be repeated here.

[0399] In some examples, the aforementioned processing unit 312 may include a transmitting subunit and a receiving subunit, or in other words, the processing unit 312 may include a communication subunit. The transmitting subunit or communication subunit may be used to send information to the cable 330 or the powered device 320, and the receiving subunit or communication subunit may be used to receive information from the cable 330 or the powered device 320.

[0400] For example, the processing unit 312 can interact with the cable 330 and the powered device 320 through the communication subunit to determine information such as the output power when the power supply device 310 supplies power to the powered device 320.

[0401] In some examples, continue to refer to Figure 16 The power supply equipment 310 may also be equipped with a single-pole double-throw switch Sw11 and a single-pole double-throw switch Sw12. The single-pole double-throw switch Sw11 can be used to connect the contact point Pt11 to the power supply Vp11 or the power supply Vcl11, and the single-pole double-throw switch Sw12 can be used to connect the contact point Pt12 to the power supply Vp12 or the power supply Vcl12.

[0402] In some examples, the power supply device 310 may also be equipped with a first switch, a second switch, a third switch, and a fourth switch. The first and second switches can be used to implement the function of the aforementioned single-pole double-throw switch Sw11, while the third and fourth switches can be used to implement the function of the aforementioned single-pole double-throw switch Sw12.

[0403] The above introduction to the single-pole double-throw switch and the first switch can be found in the following references. Figure 4 The relevant information about the power supply equipment 110 shown will not be elaborated here.

[0404] The aforementioned processing unit 312 can also be used to control the aforementioned single-pole double-throw switch or first switch to realize the electrical connection between the contacts and different power sources. The relevant control methods can be executed with reference to the content of the processing unit 112 controlling the state of the single-pole double-throw switch, which will not be elaborated here.

[0405] To simplify the circuit structure of the power supply device 310, in some examples, power supply Vcl11 and power supply Vcl12 in the power supply device 310 can be the same power supply. Similarly, power supply Vp11 and power supply Vp12 can be the same power supply.

[0406] In order to detect the event that the cable is about to be pulled out before it is pulled out of the cable interface of the powered device, and to prevent safety incidents and improve the power safety of the power supply equipment, the power supply equipment 310 may also be equipped with a conductive spring Mp1. The conductive spring Mp1 can be triggered by the indicator structure of the cable 330 to generate a separation signal. Here, the separation signal can indicate that the power supply equipment 310 and the cable 330 are about to be physically disconnected or have already been physically disconnected.

[0407] One possibility is that the conductive spring Mp1 is a sheet-like structure made of metallic material, or that the conductive spring Mp1 is a sheet-like structure made of polymer or other materials with a conductive coating on its surface.

[0408] In some examples, the two ends of the conductive spring Mp1 can be electrically connected to the contact Pt11 and the contact Pt12 respectively. The first end of the conductive spring Mp1 can be a fixed end, and the second end of the conductive spring Mp1 can be a movable end.

[0409] For example, the first end of the conductive spring Mp1 can be fixedly connected to node Ct13, which is located on the connection line between contact Pt11 and power supply Vp11 or power supply Vcl11. A node Ct14 is provided on the connection line between contact Pt12 and power supply Vp12 or power supply Vcl22, and the second end of the conductive spring Mp1 can contact or separate from this node Ct14.

[0410] In some examples, when the second end of the conductive spring Mp1 is lifted, the conductive spring Mp1 can deform and / or displace, and the second end of the conductive spring Mp1 can separate from the node Ct14, thereby disconnecting the electrical connection between the contacts Pt11 and Pt12; when the second end of the conductive spring Mp1 is not lifted, the conductive spring Mp1 recovers its deformation and displacement, the second end of the conductive spring Mp1 resumes contact with the node Ct14, and the contacts Pt11 and Pt12 resume electrical connection.

[0411] refer to Figure 15 In one possible implementation, the power supply device 310 may have an opening He1 near node Ct14. During the connection between the cable 330 and the power supply device 310, a screw used for fixing the connection can be inserted into the opening He1. One end of the screw can lift the second end of the conductive spring Mp1, causing the contacts Pt11 and Pt12 to disconnect. During the process of pulling the cable 330 out of the cable interface of the power supply device 310, the screw used for fixing the connection can be unscrewed from the opening He1. After the screw is unscrewed, the second end of the conductive spring Mp1 resumes contact with node Ct14, and the contacts Pt11 and Pt12 can resume electrical connection.

[0412] In some scenarios, the conductive spring Mp1, power supply Vp11, power supply Vp12, power supply Vcl11, power supply Vcl12 and the connecting lines between these electronic components in the power supply equipment 310 can jointly form a third signal generation circuit. The third signal generation circuit can cooperate with the indicator structure of the cable 330 to generate the aforementioned separation signal.

[0413] In some scenarios, the conductive spring Mp1 and the opening He1 can be regarded as a whole. On the one hand, it is used to trigger the generation of a separation signal, and on the other hand, it can also be used to realize the physical connection between the cable 330 and the power supply device 310. In this case, the power supply device 310 can also be regarded as a structure that includes a structure with a similar function to the indicator structure of the cable 330.

[0414] In some examples, the processing unit 312 can also detect changes in circuit level caused by the electrical connection or disconnection of contacts Pt11 and Pt12, and determine whether the cable 330 is disconnected from the power supply device 310.

[0415] One possibility is that the processing unit 312 can determine whether the power supply device 310 is disconnected from the cable 330 by detecting the level and / or level change of the contact Pt11.

[0416] For example, when the power supply device 310 is electrically connected to the power receiving device 320 via cable 330, the voltage level of the power supply device 310's contact Pt11 will decrease because the contact Pt21 of the power receiving device 320 is grounded. During the process of unplugging the cable 330 from the cable interface of the power supply device 310, the conductive spring Mp1 recovers its displacement and / or deformation, and the contacts Pt11 and Pt12 regain electrical connection. In this case, the voltage level of contact Pt11 will increase. If the voltage level of contact Pt11 is detected to rise to a preset value, and / or the increase in voltage level of contact Pt11 is greater than or equal to the preset value, the processing unit 312 can determine that the power supply device 310 is disconnected from the cable 330.

[0417] Another possibility is that the processing unit 312 can determine whether the power supply device 310 is disconnected from the cable 330 by detecting the level and / or level change of the contact Pt12.

[0418] For example, when the power supply device 310 is electrically connected to the power receiving device 320 via the cable 330, the voltage level of the power supply device 310's contact Pt12 will decrease because the contact Pt22 of the power receiving device 320 is grounded. During the process of unplugging the cable 330 from the cable interface of the power supply device 310, the contacts Pt11 and Pt12 regain electrical connection due to the recovery of displacement and / or deformation of the conductive spring Mp1. In this case, the voltage level of contact Pt12 will increase. If the voltage level of contact Pt12 is detected to rise to a preset value, and / or the increase in voltage level of contact Pt12 is greater than or equal to the preset value, the processing unit 312 can determine that the power supply device 310 is disconnected from the cable 330.

[0419] In the above example, the voltage level and / or change in voltage level used to determine the separation of the power supply device 310 from the cable 330 can be regarded as a separation signal mentioned above. The processing unit 312 can determine whether the cable 330 is separated from the powered device 320 based on whether the separation signal is detected.

[0420] Figure 17The diagram shows a power receiving device 320 in the power transmission system 300. The physical layer, protocol layer and other related components of the power receiving device 320 are not shown in the diagram.

[0421] The power receiving device 320 may include contacts Pt21 and Pt22, combined with Figure 15 and Figure 17 Contacts Pt21 and Pt22 can be used for electrical connection with cable 330.

[0422] In some examples, contact Pt21 can be grounded through resistor Rd21, which can also be called a pull-down resistor in some scenarios.

[0423] In some examples, the powered device 320 may include power supplies Vp21 and Vcl21, and the aforementioned contact Pt21 may be electrically connected to either power supply Vp21 or Vcl21. Exemplarily, a resistor Rp21 may be provided on the connection line between power supply Vp21 and contact Pt21, and power supply Vcl21 may be grounded. In some scenarios, resistor Rp21 may also be referred to as a pull-up resistor.

[0424] In some examples, contact Pt22 can be grounded through resistor Rd22, which can also be referred to as a pull-down resistor in some scenarios.

[0425] In some examples, the powered device 320 may include power supplies Vp22 and Vcl22, and the aforementioned contact Pt22 may be electrically connected to either power supply Vp22 or power supply Vcl22. For example, a resistor Rp22 may be provided on the connection line between power supply Vp22 and contact Pt22, and power supply Vcl22 may be grounded. In some scenarios, resistor Rp22 may also be referred to as a pull-up resistor.

[0426] In some examples, the powered device 320 may also be provided with a processing unit 322, which may be used to detect the internal circuit conditions of the powered device 320 (e.g., the level of nodes in the circuit), and may also be used to control one or more electronic components within the powered device 320.

[0427] In some examples, the processing unit 322 within the powered device 320 can be used to detect the voltage levels of contact Pt21 and contact Pt22.

[0428] For example, refer to Figure 17Processing unit 322 and contact Pt21 can be connected to node Ct21. Node Ct21 is located on the connection line between contact Pt21 and power supply Vp21, closer to contact Pt21. Node Ct21 is also located between contact Pt21 and resistor Rd21. Similarly, processing unit 322 and contact Pt22 can be connected to node Ct22. Node Ct22 is located on the connection line between contact Pt22 and power supply Vp22, closer to contact Pt22. Node Ct22 is also located between contact Pt22 and resistor Rd22.

[0429] One possibility is that the processing unit 322 can determine whether the power supply device 310 is electrically connected to the power receiving device 320 via the cable 330 by detecting the level and / or level change of the contact Pt21.

[0430] Another possibility is that the processing unit 322 can also determine whether the power supply device 310 is electrically connected to the power receiving device 320 via the cable 330 by detecting the level and / or level change of the contact Pt22.

[0431] One possibility is that the processing unit 322 can determine whether the cable 330 is electrically connected to the powered device 320 by detecting the level and / or level changes of the contact Pt22.

[0432] Another possibility is that the processing unit 322 can determine whether the cable 330 is electrically connected to the powered device 320 by detecting the level and / or level change of the contact Pt21.

[0433] It should be noted that when the power supply device 310 is detected to be electrically connected to the power receiving device 320, the processing unit 322 can also determine that the cable 330 is electrically connected to the power receiving device 320. In the above example, the determination of whether the cable 330 is electrically connected to the power receiving device 320 is made by detecting the level and / or level change of the contact Pt21 or the contact Pt22. This can also be understood as determining whether the internal electronic components (e.g., cable tag chip) of the cable 330 are electrically connected to the power receiving device 320 by detecting the level and / or level change of the contact Pt11 or the contact Pt12.

[0434] For details on how the processing unit 322 determines the electrical connection between the powered device 320 and the cable 330 or the power supply device 310 by detecting the level of the contact, please refer to the relevant description of the processing unit 122 above, which will not be repeated here.

[0435] In some examples, the aforementioned processing unit 322 may include a transmitting subunit and a receiving subunit, or in other words, the processing unit 322 may include a communication subunit. The transmitting subunit or communication subunit may be used to send information to the cable 330 or the power supply device 310, and the receiving subunit or communication subunit may be used to receive information from the cable 330 or the power supply device 310.

[0436] For example, the processing unit 322 can interact with the cable 330 and the power supply device 310 through the communication subunit to determine information such as the output power of the power supply device 310 when it supplies power to the powered device 320.

[0437] In some examples, the power receiving device 320 may also be equipped with a first single-pole three-throw switch and a second single-pole three-throw switch. The first single-pole three-throw switch is used to connect contact point Pt21 to power supply Vp21, power supply Vcl21, or resistor Rd21. The second single-pole three-throw switch is used to connect contact point Pt22 to power supply Vp22, power supply Vcl22, or resistor Rd22.

[0438] In some examples, the power receiving device 320 may also be equipped with switches Sw21-1, Sw21-2, Sw21-3, Sw22-1, Sw22-2, and Sw22-3. Switches Sw21-1, Sw21-2, and Sw21-3 can be used to implement the function of the aforementioned first single-pole three-throw switch, while switches Sw22-1, Sw22-2, and Sw22-3 can be used to implement the function of the aforementioned second single-pole three-throw switch.

[0439] Similarly, the aforementioned processing unit 322 can be used to control the state of multiple switches such as the aforementioned switch Sw21-1 to control the contact Pt21 to be electrically connected to the power supply Vp21, power supply Vcl21 or resistor Rd21, or to control the contact Pt22 to be electrically connected to the power supply Vp22, power supply Vcl22 or resistor Rd22.

[0440] For more information on the above-mentioned single-pole three-throw switch and switch Sw21-1, please refer to [link / reference]. Figure 5 The relevant information about the power receiving device 120 shown will not be elaborated here.

[0441] The aforementioned processing unit 322 can also be used to control the aforementioned first single-pole three-throw switch or switch Sw21-1, etc. The relevant control methods can be executed with reference to the content of the processing unit 122 controlling the state of the single-pole three-throw switch, which will not be elaborated here.

[0442] To simplify the circuit structure of the powered device 320, in some examples, power supplies Vcl21 and Vcl22 in the powered device 320 can be the same power supply. Similarly, power supplies Vp21 and Vp22 can be the same power supply.

[0443] In order to detect the event that the cable is about to be pulled out before it is pulled out of the cable interface of the powered device, and to prevent safety incidents and improve the power safety of the power supply equipment, a conductive spring Mp2 can also be provided in the powered device 320. The conductive spring Mp2 can be triggered by the indicator structure of the cable 330 to generate a separation signal. Here, the separation signal can indicate that the powered device 320 and the cable 330 are about to disconnect or have already disconnected physically.

[0444] One possibility is that the conductive spring Mp2 is a sheet-like structure made of metallic material, or that the conductive spring Mp2 is a sheet-like structure made of polymer or other materials with a conductive coating on its surface.

[0445] In some examples, the two ends of the conductive spring Mp2 can be electrically connected to the contacts Pt21 and Pt22 respectively. The first end of the conductive spring Mp2 can be a fixed end, and the second end of the conductive spring Mp2 can be a movable end.

[0446] For example, the first end of the conductive spring Mp2 can be fixedly connected to node Ct23, which is located on the connection line between contact Pt21 and power supply Vp21 or power supply Vcl21. A node Ct24 is provided on the connection line between contact Pt22 and power supply Vp22 or power supply Vcl22, and the second end of the conductive spring Mp2 can contact or separate from this node Ct24.

[0447] In some examples, when the second end of the conductive spring Mp2 is lifted, the conductive spring Mp2 can deform and / or displace, and the second end of the conductive spring Mp2 can separate from the node Ct24, thereby disconnecting the electrical connection between the contacts Pt21 and Pt22; when the second end of the conductive spring Mp2 is not lifted, the conductive spring Mp2 recovers its deformation and displacement, the second end of the conductive spring Mp2 resumes its electrical connection with the node Ct24, and the contacts Pt21 and Pt22 resume their electrical connection.

[0448] refer to Figure 15 and Figure 17In one possible implementation, the power receiving device 320 may have an opening He2 near node Ct24. During the connection between the cable 330 and the power receiving device 320, a screw used for fixing the connection can be inserted into the opening He2. One end of the screw can lift the second end of the conductive spring Mp2, causing the contacts Pt21 and Pt22 to disconnect. During the process of pulling the cable 330 out of the cable interface of the power receiving device 320, the screw used for fixing the connection can be unscrewed from the opening He2. After the screw is unscrewed, the second end of the conductive spring Mp2 resumes contact with node Ct24, and the contacts Pt21 and Pt22 can resume electrical connection.

[0449] In some scenarios, the conductive spring Mp2, power supply Vp21, power supply Vp22, power supply Vcl21, power supply Vcl22 and the connecting lines between these electronic components in the power receiving device 320 can jointly form a fourth signal generation circuit. The fourth signal generation circuit can cooperate with the indicator structure of the cable 330 to generate the aforementioned separation signal.

[0450] In some scenarios, the conductive spring Mp2 and the opening He2 can be regarded as a whole. On the one hand, it is used to trigger the generation of a separation signal, and on the other hand, it can also be used to realize the physical connection between the cable 330 and the power receiving device 320. In this case, the power receiving device 320 can also be regarded as a structure that includes a structure with a similar function to the indicator structure of the cable 330.

[0451] In some examples, the processing unit 322 can also detect changes in circuit level caused by the electrical connection or disconnection of contacts Pt21 and Pt22, and determine whether the cable 330 is disconnected from the powered device 320.

[0452] One possibility is that the processing unit 322 can determine whether the powered device 320 is disconnected from the cable 330 by detecting the level and / or level change of the contact Pt21.

[0453] For example, when the powered device 320 is electrically connected to the powered device 320 via the cable 330, the voltage level of the contact Pt21 of the powered device 320 will decrease because the contact Pt21 of the powered device 320 is grounded. During the process of unplugging the cable 330 from the cable interface of the powered device 320, the voltage level of the contact Pt21 will increase because the conductive spring Mp2 recovers its displacement and / or the contact Pt21 and contact Pt22 regain electrical connection. When the voltage level of the contact Pt21 is detected to rise to a preset value, and / or the rise in voltage level of the contact Pt21 is greater than or equal to the preset value, the processing unit 312 can determine that the powered device 320 is separated from the cable 330.

[0454] Another possibility is that the processing unit 322 can determine whether the powered device 320 is disconnected from the cable 330 by detecting the level and / or level change of the contact Pt22.

[0455] For example, when the powered device 320 is electrically connected to the powered device 320 via the cable 330, the voltage level of the contact Pt22 of the powered device 320 will decrease because the contact Pt22 of the powered device 320 is grounded. During the process of unplugging the cable 330 from the cable interface of the powered device 320, the voltage level of the contact Pt22 will increase because the conductive spring Mp2 recovers its displacement and / or the contact Pt21 and contact Pt22 regain electrical connection. When the voltage level of the contact Pt22 is detected to rise to a preset value, and / or the rise in voltage level of the contact Pt22 is greater than or equal to the preset value, the processing unit 322 can determine that the powered device 320 is separated from the cable 330.

[0456] In the above example, the voltage level and / or change in voltage level used to determine the separation of the powered device 320 from the cable 330 can be regarded as a separation signal mentioned above. The processing unit 322 can determine the separation of the cable 330 from the powered device 320 based on whether the separation signal is detected.

[0457] Figure 18 The diagram shows a cable 330 in the power transmission system 300. The cable 330 includes an indicator structure that can be used to trigger the generation of the aforementioned separation signal. This separation signal indicates that the cable 230 is about to disconnect from the power supply device 210 (or the power receiving device 220) or has already disconnected physically. In some scenarios, the power supply device 210 or the power receiving device 220 connected to the cable 230 can both be referred to as the target device.

[0458] Cable 330 may include cable tag chip CM1, cable tag chip CM2, signal line CL1, signal line CL2a and signal line CL2b, and voltage bus VBUS. For details on these electronic components and connecting lines, please refer to the previous text. Figure 2 Some related explanations will not be repeated here.

[0459] In some examples, cable 230 may also include contacts Pt31a, Pt31b, Pt32a, and Pt32b, which are related to... Figure 12 The corresponding content of cable 230 shown is basically the same. For details, please refer to the relevant description above. It will not be repeated here.

[0460] In some examples, the indicator structure of cable 330 may include openings He3a and He3b, with opening He3a corresponding to opening He1 on power supply device 310 and opening He3b corresponding to opening He3b on power receiving device 320.

[0461] In some examples, the indicator structure may also include a screw Sc1 that mates with the opening He3a and a screw Sc2 that mates with the opening He3b.

[0462] In one possible implementation, during the connection of cable 330 and power supply device 310, screw Sc1 simultaneously passes through openings He3a and He1, with the external thread of the screw engaging with the internal thread of the opening, thus achieving a fixed connection between cable 330 and power supply device 310. Simultaneously with screw Sc1 being inserted into opening He1, screw Sc1 can also lift the second end of conductive spring Mp1, thereby disconnecting the electrical connection between contacts Pt11 and Pt12. During the separation of cable 330 from power supply device 310, screw Sc1 is unscrewed from opening He1, conductive spring Mp1 recovers its displacement and / or deformation, and contacts Pt11 and Pt12 regain electrical connection.

[0463] Similarly, in one possible implementation, during the connection of cable 330 and powered device 320, screw Sc2 simultaneously passes through openings He3b and He2, with the external thread of the screw engaging with the internal thread of the opening, thus achieving a fixed connection between cable 330 and powered device 320. Simultaneously with screw Sc2 being inserted into opening He2, screw Sc2 can also lift the second end of conductive spring Mp2, thereby disconnecting the electrical connection between contacts Pt21 and Pt22. During the separation of cable 330 from powered device 320, screw Sc2 is unscrewed from opening He2, conductive spring Mp2 recovers its displacement and / or deformation, and contacts Pt21 and Pt22 regain electrical connection.

[0464] It should be noted that the openings and screws in the above-mentioned indicator structure can also be used for the physical connection between the cable 330 and the power supply equipment 310 or the power receiving equipment 320.

[0465] Based on a principle similar to that of the power transmission system 300, referencing Figure 19 and Figure 20 This application also provides an electrical power transmission system 400 and an electrical power transmission system 500.

[0466] like Figure 19As shown, unlike the power transmission system 300, in the power transmission system 400, the end of the cable 430 connected to the power supply equipment 410 and the end of the cable 430 connected to the power receiving equipment 420 are respectively provided with conductive springs, while the power supply equipment 410 and the power receiving equipment 420 may not be provided with conductive springs.

[0467] Similar to the power transmission system 300, in the power transmission system 400, the power supply device 410 and cable 430 can also be provided with openings for use with screws, and the power receiving device 420 and cable 430 can also be provided with openings for use with screws. When the screw is inserted into the opening, one end of the conductive spring in the cable 430 will be pushed up, thereby disconnecting the signal line CL1 from the signal line CL2a or the signal line CL2b. That is, the contacts Pt11 and Pt12 of the power supply device 410 will be disconnected, or the contacts Pt21 and Pt22 of the power receiving device 420 will be disconnected. When the screw is removed from the opening, the conductive spring located in the cable 430 will restore its displacement and / or deformation, thereby restoring the electrical connection between signal line CL1 and signal line CL2a or signal line CL2b, that is, the contacts Pt11 and Pt12 of the power supply device 410 will be restored to electrical connection, or the contacts Pt21 and Pt22 of the power receiving device 420 will be restored to electrical connection.

[0468] The conductive spring in the power transmission system 400 is placed inside the cable 430, which helps to simplify the complexity of the power supply equipment 410 and the power receiving equipment 420, improves the applicability of the cable 430 to different equipment, and reduces the dependence of the solution on the equipment.

[0469] like Figure 20 As shown, unlike the power transmission system 300, in the power transmission system 500, both ends of the conductive springs in the power supply equipment 510 or the power receiving equipment 520 are movable, and two openings are provided at the connection points between the power supply equipment 510 or the power receiving equipment 520 and the cable 530. Correspondingly, two openings are also provided at both ends of the cable 530, and the cable 530 is equipped with two pairs of screws.

[0470] During the process of separating the cable 530 from the power supply device 510 or the power receiving device 520, both screws used to fix the cable 530 to the power supply device 510 or the power receiving device 520 need to be removed from the opening so that the conductive spring can fully restore its displacement and / or deformation, so that the contacts Pt11 and Pt12 of the power supply device 510 can restore the electrical connection, and so that the contacts Pt21 and Pt22 of the power receiving device 520 can restore the electrical connection.

[0471] For other details regarding power transmission system 400 and power transmission system 500, please refer to the relevant content of power transmission system 300; they will not be elaborated upon here.

[0472] Figure 21 This roughly illustrates the changes in the conductive springs during the separation of cables from equipment in the three different power transmission systems described above.

[0473] Indication Figure 3-1 This can indicate the state of the conductive spring in the power supply equipment 310 when the cable 330 in the power transmission system 300 is connected to the power supply equipment 310, that is, one end of the conductive spring is pushed up by the screw. Figure 3-2 This can represent the state of the conductive spring in the power supply equipment 310 during the separation of the cable 330 from the power supply equipment 310, that is: under the action of external force F, the screw gradually moves out of the power supply equipment 310, the conductive spring that has been displaced and / or deformed gradually recovers, and the contacts Pt11 and Pt12 restore electrical connection through the conductive spring.

[0474] Indication Figure 4-1 This can indicate the state of the conductive spring in the cable 430 when the cable 430 is connected to the power supply equipment 410 in the power transmission system 400, that is, one end of the conductive spring is pushed up by the screw. Figure 4-2 This can represent the state of the conductive spring in the cable 430 during the process of separating the cable 430 from the power supply equipment 410, that is: under the action of external force F, the screw gradually moves out of the cable 430, the conductive spring that has been displaced and / or deformed gradually recovers, and the contacts Pt31 and Pt32 restore electrical connection through the conductive spring.

[0475] Indication Figure 5-1 This can represent the state of the conductive spring in the power supply equipment 510 when the cable 530 in the power transmission system 500 is connected to the power supply equipment 510, that is, both ends of the conductive spring are lifted up by screws. Figure 5-2 This can represent the state of the conductive spring in the power supply equipment 510 during the process of separating the cable 530 from the power supply equipment 510. That is, under the action of the external forces (F1 and F2) acting on the two screws, the two screws are removed from the power supply equipment 510 respectively, and the conductive spring that has been displaced and / or deformed gradually recovers, and the contacts Pt11 and Pt12 restore electrical connection through the conductive spring.

[0476] The signal changes of different lines in the above-mentioned power transmission systems 300, 400 and 500 are basically the same during cable plugging and unplugging. The following explanation uses power transmission system 300 as an example. The other two power transmission systems can be implemented with reference to this.

[0477] The cable 330 is connected to the power supply equipment 310 and the power receiving equipment 320 respectively according to the following... Figure 15When the electrical connection is as shown, in response to the user inserting or unplugging the cable 330 into or from the cable interface of the powered device 320, the voltage level signal of the contact point connecting the power supply device 310 or the powered device 320 to the cable 330 will change to a certain extent, and the voltage bus transmission of electrical energy will also change to a certain extent.

[0478] Regarding the insertion of cable 330 into power supply device 310 or power receiving device 320, the changes in the voltage level of the contacts of power supply device 310, the changes in the voltage level of contacts of power receiving device 320, and the changes in the power transmission of the voltage bus within cable 330, this part is related to the previous text. Figure 7 and Figure 8 The relevant content is similar, and you can refer to the above content for details, which will not be repeated here.

[0479] Figure 22 In the diagram, broken lines S10, S11, and S12 respectively represent the voltage levels of contact Pt11 and contact Pt12 of the power supply device 310, as well as the power transmission status of the voltage bus VBUS.

[0480] During the electrical connection process between the power supply equipment 310, cable 330, and power receiving equipment 320, one possible scenario is that cable 330 is first electrically connected to power receiving equipment 320, and then electrically connected to power supply equipment 310. Figure 22 This case will be used as an example for illustration.

[0481] When cable 330 is not electrically connected to power supply equipment 310, contacts Pt11 and Pt12 are electrically connected to power supplies Vp11 and Vp12 respectively. The voltage level Vs10 of contact Pt11 is equal to the voltage level of power supply Vp11, and the voltage level Vs11 of contact Pt12 is equal to the voltage level of power supply Vp12, i.e., Vs10 = Vp11, Vs8 = Vp12. Since contacts Pt11 and Pt12 are electrically connected through conductive spring Mp1, the voltage level Vs10 of contact Pt11 is also equal to the voltage level Vs11 of contact Pt12, i.e., Vs10 = Vp11 = Vs8 = Vp12.

[0482] In response to the physical connection between cable 330 and power supply device 310, the screw for connection is inserted into power supply device 310, one end of conductive spring Mp1 is lifted, contacts Pt11 and Pt12 are disconnected, and the voltage level Vs10 of contact Pt11 and the voltage level Vs11 of contact Pt12 are no longer equal.

[0483] Referring to line S10, in response to the power receiving device 320, it is electrically connected to cable 330, and the power supply device 310 is electrically connected to the power receiving device 320. The contact Pt11 of the power supply device 310 is electrically connected to the contact Pt21 of the power receiving device 320. Since the contact Pt21 is grounded, the voltage level of the contact Pt11 will drop, and a falling edge of the voltage level appears on line S7 between points K1 and K2.

[0484] In some examples, the processing unit 312 of the power supply device 310 can continuously detect the level of contact Pt11 within a preset duration Tin. If the level of contact Pt11 remains near the fallen level within the preset duration Tin, the processing unit 312 can determine that the powered device 320 is electrically connected to the power supply device 310, and can then start supplying power to the powered device 320 through the voltage bus VBUS. This is reflected in the broken line S12, where the broken line S12 shows a rising edge at the time corresponding to point K3. In some scenarios, the aforementioned preset duration Tin can be referred to as the anti-jitter duration.

[0485] Referring to line S11, in response to the electrical connection between cable 330 and power supply device 310, contact Pt12 of power supply device 310 is electrically connected to resistor Ra1 in cable 330. Since resistor Ra1 is grounded, the level of contact Pt12 will drop, and a falling edge of the level will appear between point U1 and point U2 in line S11.

[0486] In some examples, the communication subunit of the processing unit 312 of the power supply device 310 receives an instruction to power the cable tag chip CM1 in the cable 330 at the time corresponding to point U3. The processing unit 312 can control the contact Pt12 to be electrically connected to the power supply Vcl12. Referring to the broken line S11, a rising edge of the level appears between point U3 and point U4 on the broken line S11. The power supply device 310 starts to power the cable tag chip CM1 from the time corresponding to point U3.

[0487] Continuing with line break S10, in response to the user removing screw Sc1 from opening He1, contacts Pt11 and Pt12 become electrically connected. Since contact Pt12 is electrically connected to power supply Vcl12 and is at a high level, shorting Pt11 and Pt12 will cause the voltage level of contact Pt11 to rise, resulting in a rising edge between points K4 and K5 on line break S10.

[0488] In some examples, the processing unit 312 of the power supply device 310 can continuously detect the level of contact Pt11 within a preset duration Tout. If the level of contact Pt11 remains near the level after the rise within the preset duration Tout, the processing unit 312 can determine that the user intends to disconnect the electrical connection between the power supply device 310 and the powered device 320. Therefore, starting from the moment corresponding to point K6, it reduces the power transmission power of the voltage bus VBUS or stops supplying power to the powered device 320. The power supply device 310 can also stop supplying power to the cable chip CM1 of the cable 330 starting from the moment corresponding to point K6. Reflected on line segments S11 and S12, a falling edge appears on line segment S11 between points U5 and U6. A falling edge appears on line segment S12 starting from the moment corresponding to point K6. In some scenarios, the aforementioned preset duration Tout can also be called the anti-jitter duration.

[0489] In response to the power supply device 310 stopping power supply to the cable chip CM1, contact Pt12 is no longer at a high level. Consequently, the level of contact Pt11, which is shorted to contact Pt12, drops. Referring to line S10, a falling edge appears between points K6 and K7. After a certain period (the time interval between points K7 and K8), cable 330 is unplugged from the cable interface of power supply device 310 (i.e., the physical connection between power supply device 310 and cable 330 is broken) or unplugged from the cable interface of powered device 320 (i.e., the physical connection between cable 330 and powered device 320 is broken). Contact Pt11 of power supply device 310 disconnects from contact Pt21 of powered device 320, and the level of contact Pt11 rises. Referring to line S10, a rising edge appears between points K8 and K9.

[0490] In response to the power supply device 310 ceasing to supply power to the cable chip CM1, the voltage level at contact Pt12 will drop, and a falling edge will appear between points U5 and U6 in the reference line S11. If it is determined that the power supply device 310 has lost its physical connection with the power receiver 320, the internal circuitry of the power supply device 310 can return to its default state; for example, contact Pt12 will be electrically connected to the power supply Vp12, and a rising edge will appear between points U7 and U8 in the reference line S11.

[0491] As described above, power supply device 310 shuts down or reduces the power transmission of the voltage bus VBUS at point K6. Only after this (at point K8) is cable 330 disconnected from the cable interface. In other words, before the user disconnects cable 330, the power transmission power of the voltage bus VBUS is already within a relatively safe range, greatly reducing the probability of arcing or other safety incidents when the user disconnects cable 330.

[0492] The above are merely examples of some power transmission systems. Based on the disclosure of this application, those skilled in the art can determine other power transmission systems through simple changes. For example, the aforementioned power supply equipment 110, cable 210 and power receiving equipment 330 can be combined to form a new power transmission system. It should be noted that this part should also be understood as part of the disclosure of this application.

[0493] like Figure 23 As shown, based on the above-mentioned power supply equipment, this application embodiment also provides a method for power transmission, wherein when the power supply equipment detects a first signal indicating that the cable is separated from the power supply equipment, the power supply equipment can reduce or turn off the power output of the power supply equipment.

[0494] S110, the first signal for power supply equipment detection.

[0495] Here, the first signal can be used to indicate the disconnection of the cable power supply equipment; in some scenarios, the first signal can also be called the disconnection signal.

[0496] In some examples, the first signal can be triggered by the cable's indicator structure.

[0497] For example, in the power transmission system 100, when the cable 130 is connected to the power supply device 110, in response to the screw Sc1a in the indicator structure being removed from the conductive hole Hc11 and the conductive hole Hc31a, the conductive hole Hc11 and the conductive hole Hc12 of the power supply device 110 are disconnected from each other. The processing unit 112 can detect the level and / or level change of node A, and the level and / or level change of node A can be used to indicate that the power supply device 110 is separated from the cable 130.

[0498] For example, in the power transmission system 200, when the cable 230 is connected to the power supply device 210, in response to the contact point 235A and the contact point 235B in the indicator structure, the signal line CL1 and the signal line CL2a are shorted, and the contacts Pt11 and Pt12 of the power supply device 210 are electrically connected. The processing unit 212 can detect the level and / or level change of node Ct11, and the level and / or level change of node Ct11 can be used to indicate that the power supply device 210 is separated from the cable 230.

[0499] For example, in the power transmission system 300, when the cable 330 is connected to the power supply device 310, in response to the screw Sc1 in the indicator structure being removed from the power supply device 310, the conductive spring Mp1 in the power supply device 310 is electrically connected to the contacts Pt11 and Pt12 of the power supply device 310. The processing unit 312 can detect the level and / or level change of the node Ct11. The level and / or level change of the node Ct11 can be used to indicate that the power supply device 310 is separated from the cable 330.

[0500] S120, in response to the detection of the first signal, reduces or shuts down the power output of the power supply equipment.

[0501] Upon detecting the first signal, the power supply equipment can determine that the user intends to disconnect the physical connection between the cable and the power supply equipment. In order to prevent safety incidents such as arcing during the user's cable disconnection process, the power supply equipment can control the power output module to reduce or shut down the power output to the powered device.

[0502] Before the user actually unplugs the cable from the cable interface of the power supply equipment, the power supply equipment can detect the user's intention to unplug the cable by detecting the first signal, and thus take corresponding safety measures, which helps to improve the power safety of the power supply equipment.

[0503] like Figure 24 As shown, based on the above-mentioned power receiving device, this application embodiment also provides a method for power transmission, wherein when the power receiving device detects a second signal indicating that the cable is separated from the power receiving device, it can indicate that the cable is separated from the power receiving device.

[0504] S210, Second signal for power receiving equipment detection.

[0505] Here, the second signal can be used to indicate that the cable is disconnected from the powered equipment. In some scenarios, the second signal can also be called the disconnection signal.

[0506] In some examples, the second signal can be triggered by the cable's indicator structure.

[0507] For example, in the power transmission system 100, when the cable 130 is connected to the power receiving device 120, in response to the screw Sc1b in the indicator structure being removed from the conductive holes Hc21 and Hc31b, the conductive holes Hc21 and Hc22 of the power receiving device 120 are disconnected from each other. The processing unit 122 can detect the level and level change of node B. The level and / or level change of node B can be used to indicate that the power receiving device 120 is separated from the cable 130.

[0508] For example, in the power transmission system 200, when the cable 230 is connected to the powered device 220, in response to the contact point 235A and the contact point 235B in the indicator structure making contact, the signal line CL1 and the signal line CL2b are shorted, and the contacts Pt21 and Pt22 of the powered device 220 are electrically connected. The processing unit 222 can detect the level and / or level change of node Ct21, and the level and / or level change of node Ct21 can be used to indicate that the powered device 220 is separated from the cable 230.

[0509] For example, in the power transmission system 300, when the cable 330 is connected to the power receiving device 320, in response to the screw Sc2 in the indicator structure being removed from the power receiving device 320, the conductive spring Mp2 in the power receiving device 320 is electrically connected to the contacts Pt21 and Pt22 of the power receiving device 320. The processing unit 322 is able to detect the level and / or level change of node Ct21. The level and / or level change of node Ct21 can be used to indicate that the power receiving device 320 is disconnected from the cable 330.

[0510] S220, in response to the detection of the second signal, displays a prompt message indicating that the cable has been disconnected from the powered device.

[0511] Upon detecting the second signal, the receiving device can determine that the user intends to disconnect the physical connection between the cable and the receiving device. To prevent accidental damage to the power supply equipment during the user's cable disconnection process, the receiving device can notify the user through visual or auditory means that the power supply cable will stop supplying power and prompt the user to take appropriate measures such as saving data.

[0512] Taking devices with displays, such as smart screens and televisions, as examples, the receiving device can display such as Figure 25 The displayed message reads: "Power cable will be removed soon. Please save your data!"

[0513] Before the user actually unplugs the cable from the cable interface of the powered device, the powered device can detect the user's intention to unplug the cable by detecting a second signal, thereby reminding the user to take appropriate measures, which helps to improve the electrical safety of the powered device.

[0514] Based on the above description of power supply equipment and power receiving equipment in various power transmission systems, this application also provides a target device that can be electrically connected to a cable. The target device can be provided with an indicator structure, which can both realize the physical connection between the cable and the target device and trigger the generation of a signal to indicate the physical connection status between the target device and the cable. The target device can also detect the signal to perform relevant safety measures to improve the electrical safety of the target device.

[0515] In some examples, the target device can be either a power supply device or a power receiving device as described above. If the target device is a power supply device, it may further include a power output module for controlling the output power of the target device. If the target device is a power receiving device, it may further include a power input module for controlling the input power of the target device.

[0516] In some examples, the target device may include a first contact and a second contact, which can be used for electrical connection between the target device and a cable.

[0517] For details regarding the first and second contacts, please refer to the previous descriptions of contacts Pt11, Pt12, Pt21, and Pt22. These details will not be repeated here.

[0518] In some examples, the indicator structure includes a first fastener and a second fastener, the first fastener being electrically connected to a power source and the second fastener being grounded; the first and second fasteners are used to connect the target device to the cable; when the first and / or second fasteners are not in a connected state, the indicator structure triggers the power source to generate a disconnect signal, and when both the first and second fasteners are in a connected state, the indicator structure triggers the power source to generate a connection signal.

[0519] Here, the relevant descriptions of the first and second fasteners can be found in the previous descriptions of the first conductive component, the second conductive component, the third conductive component, and the fourth conductive component, etc., and will not be repeated here.

[0520] In some examples, the aforementioned power supply includes a first power supply and a second power supply, a first contact is electrically connected to the first power supply, a second contact is electrically connected to either the first or the second power supply, an indicator structure is used to control the electrical connection or disconnection of the first and second contacts, and in the case of the first and second contacts being electrically connected, the indicator structure triggers a disconnection signal.

[0521] In some examples, the indicator structure includes a first structure in which, when the first structure is in a first state, the first contact and the second contact are electrically connected.

[0522] In some examples, the indicator structure also includes a latch for connecting the target device to the cable, which unlocks when the first structure is in the first state.

[0523] For details regarding the structural components, please refer to the previous descriptions of structural components Cp1, Cp2, etc., which will not be repeated here.

[0524] In some examples, the indicator structure includes a fastener for connecting the target device to the cable, and the fastener also serves to trigger a disconnect signal. When the fastener is in a disconnected state, the first and second contacts are electrically connected; when the fastener is in a connected state, the first and second contacts are electrically disconnected.

[0525] For details regarding the structural components, please refer to the previous sections on screw Sc1 and opening He1; they will not be repeated here.

[0526] In this technical solution, the target device can be equipped with an indicator structure for realizing the physical connection between the cable and the device. The indicator structure can also trigger connection signals and / or disconnection signals. The target device can be widely applied to existing cables.

[0527] Based on a similar principle, this application also provides an electrical power transmission device. This device can possess the functions of the power supply equipment in the above method embodiments and can be used to execute the steps performed by the functions of the power supply equipment in the above method embodiments. This function can be implemented by hardware, or by software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0528] This application also provides an apparatus for power transmission, which can have the functions of the powered device in the above method embodiments and can be used to perform the steps executed by the functions of the powered device in the above method embodiments. This function can be implemented in hardware, or in software, or in hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0529] This application also provides a power supply device, which includes at least one processor and a transceiver. The processor is coupled to a memory and is used to execute instructions stored in the memory to control the transceiver to transmit and / or receive signals.

[0530] Optionally, the electronic device also includes a memory for storing instructions.

[0531] In some embodiments, the processor and memory described above can be combined into a single processing device, with the processor executing program code stored in the memory to implement the aforementioned functions. In specific implementations, the memory can be integrated into the processing device or independent of the processor.

[0532] In some embodiments, a transceiver may include a receiver (or receiver unit) and a transmitter (or transmitter unit).

[0533] The transceiver may further include antennas, and the number of antennas may be one or more. The transceiver may be a communication interface or interface circuit.

[0534] When the electronic device is a chip, the chip includes a transceiver module and a processing module. The transceiver module can be an input / output circuit or a communication interface; the processing module can be a processor, microprocessor, or integrated circuit integrated on the chip.

[0535] This application also provides a powered device comprising: at least one processor and a transceiver. The processor is coupled to a memory and is used to execute instructions stored in the memory to control the transceiver to transmit and / or receive signals.

[0536] Optionally, the electronic device also includes a memory for storing instructions.

[0537] In some embodiments, the processor and memory described above can be combined into a single processing device, with the processor executing program code stored in the memory to implement the aforementioned functions. In specific implementations, the memory can be integrated into the processing device or independent of the processor.

[0538] In some embodiments, a transceiver may include a receiver (or receiver unit) and a transmitter (or transmitter unit).

[0539] The transceiver may further include antennas, and the number of antennas may be one or more. The transceiver may be a communication interface or interface circuit.

[0540] When the electronic device is a chip, the chip includes a transceiver module and a processing module. The transceiver module can be an input / output circuit or a communication interface; the processing module can be a processor, microprocessor, or integrated circuit integrated on the chip.

[0541] This embodiment also provides a computer-readable storage medium storing computer instructions. When the computer instructions are executed on an electronic device, the electronic device performs the aforementioned method steps to implement the power transmission method in the above embodiment.

[0542] This embodiment also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned steps to realize the power transmission method in the above embodiment.

[0543] Furthermore, embodiments of this application also provide an apparatus, which may specifically be a chip, component, or module. This apparatus may include a connected processor and a memory. The memory stores computer execution instructions. When the apparatus is running, the processor can execute the computer execution instructions stored in the memory to cause the chip to perform the power transfer methods described in the above-described method embodiments.

[0544] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0545] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0546] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0547] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0548] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0549] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0550] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cable, characterized in that, include: The first indicator structure, the first signal line, the second signal line, and the first cable tag chip. The first signal line is electrically connected to the first contact and the second contact at both ends of the cable; The second signal line is electrically connected to the third contact of the cable and the first cable tag chip; The first indicator structure is used to connect the first target device and the cable. The first indicator structure is also used to trigger a first connection signal and / or a first separation signal. The first connection signal is used to indicate that the cable is connected to the first target device, and the first separation signal is used to indicate that the cable is separated from the first target device. The first indicating structure includes a fifth conductive component and a sixth conductive component, the fifth conductive component and the sixth conductive component are located at one end of the cable, and the fifth conductive component is electrically connected to the sixth conductive component; the first target device includes a first conductive component and a second conductive component; When the cable is connected to the first target device, the fifth conductive component is electrically connected to the first conductive component, and the sixth conductive component is electrically connected to the second conductive component, triggering the first connection signal; and / or, When the cable is disconnected from the first target device, the fifth conductive component and the first conductive component are disconnected from each other, and / or the sixth conductive component and the second conductive component are disconnected from each other, triggering a first separation signal.

2. The cable according to claim 1, characterized in that, The cable further includes: a second indicator structure, wherein the first indicator structure and the second indicator structure are respectively located at both ends of the cable; The second indicator structure is used to connect the second target device to the cable. The second indicator structure is also used to trigger a second connection signal and / or a second separation signal. The second connection signal is used to indicate that the cable is connected to the second target device, and the second separation signal is used to indicate that the cable is separated from the second target device.

3. The cable according to claim 2, characterized in that, The second indicating structure includes a seventh conductive component and an eighth conductive component; the seventh conductive component and the eighth conductive component are located at the other end of the cable, and the seventh conductive component is electrically connected to the eighth conductive component; the second target device includes a third conductive component and a fourth conductive component; When the cable is connected to the second target device, the seventh conductive component and the third conductive component are electrically connected, and the eighth conductive component and the fourth conductive component are electrically connected, triggering the second connection signal; and / or, When the cable is disconnected from the second target device, the seventh conductive component and the third conductive component are disconnected, and / or the eighth conductive component and the fourth conductive component are disconnected, triggering a second separation signal.

4. The cable according to any one of claims 1 to 3, characterized in that, The cable also includes a third signal line and a second cable tag chip. The third signal line connects the fourth contact of the cable and the second cable tag chip. The fourth contact and the third contact are located at opposite ends of the cable.

5. The cable according to claim 4, characterized in that, One or more of the first contact, the second contact, the third contact, and the fourth contact are pins.

6. A power supply device, characterized in that, include: First contact, second contact, first power supply, second power supply, and processing unit. The first contact is electrically connected to the first power source; The second contact is electrically connected to either the first power source or the second power source; The processing unit is used to: detect a first signal, the first signal being used to indicate whether the cable is connected to or disconnected from the power supply equipment; The power supply equipment also includes a first conductive component and a second conductive component; When the cable is connected to the power supply equipment, the first conductive component is electrically connected to the second conductive component; When the cable is disconnected from the power supply equipment, the first conductive component and the second conductive component are disconnected from each other. The detection of the first signal includes: detecting the first signal based on the change in the electrical connection state between the first conductive component and the second conductive component.

7. The power supply equipment according to claim 6, characterized in that, The first conductive component is electrically connected to the first power source, and the second conductive component is grounded.

8. The power supply equipment according to claim 7, characterized in that, There is no electrical connection between the first conductive component and the second conductive component; When the cable is connected to the power supply equipment, the first conductive component and the second conductive component are electrically connected through the cable.

9. The power supply equipment according to any one of claims 6 to 8, characterized in that, The power supply equipment includes a single-pole double-throw switch. The common terminal of the single-pole double-throw switch is electrically connected to the second contact, and the two contacts of the single-pole double-throw switch are electrically connected to the first power supply and the second power supply, respectively. The processing unit is also used to: control the single-pole double-throw switch to electrically connect the second contact to the first power supply or the second power supply.

10. The power supply equipment according to any one of claims 6 to 8, characterized in that, The processing unit is further configured to: reduce or shut down the power output of the power supply device in response to the first signal.

11. The power supply equipment according to any one of claims 6 to 8, characterized in that, The first contact or the second contact is a pin.

12. A power receiving device, characterized in that, include: First contact, second contact, first power supply, second power supply, and processing unit. The first contact is grounded; The second contact is electrically connected to either the first power source or the second power source; The processing unit is used to: detect a second signal, the second signal being used to indicate whether the cable is connected to or disconnected from the powered device; The power receiving device further includes a first conductive component and a second conductive component; When the cable is connected to the power receiving device, the first conductive component is electrically connected to the second conductive component; when the cable is disconnected from the power receiving device, the first conductive component is disconnected from the second conductive component. The detection of the second signal includes: detecting the second signal based on the change in the electrical connection state between the first conductive component and the second conductive component.

13. The power receiving equipment according to claim 12, characterized in that, The first conductive component is electrically connected to the first power source, and the second conductive component is grounded.

14. The power receiving equipment according to claim 13, characterized in that, There is no electrical connection between the first conductive component and the second conductive component; When the cable is connected to the powered device, the first conductive component and the second conductive component are electrically connected through the cable.

15. The power receiving equipment according to any one of claims 12 to 14, characterized in that, The power receiving device includes a single-pole three-throw switch. The common terminal of the single-pole three-throw switch is electrically connected to the second contact, and the three contacts of the single-pole three-throw switch are respectively electrically connected to the first power supply, the second power supply, and ground. The processing unit is also used to: control the single-pole three-throw switch to electrically connect the second contact to the first power supply, the second power supply, or ground.

16. The power receiving equipment according to any one of claims 12 to 14, characterized in that, The processing unit is further configured to: in response to the second signal, display a prompt message, the prompt message being used to indicate that the power supply cable of the powered device is disconnected.

17. The power receiving equipment according to any one of claims 12 to 14, characterized in that, The first contact or the second contact is a pin.

18. A power transmission system, characterized in that, Includes the cable as claimed in any one of claims 1 to 5, the power supply device as claimed in any one of claims 6 to 11, and the power receiving device as claimed in any one of claims 12 to 17; The power supply equipment and the power receiving equipment are respectively connected to or disconnected from both ends of the cable.

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