Power receiving device and communication method

Abstract

The present application discloses a power receiving device and a communication method, wherein a second communication module is added to the power receiving device; the first end of the second communication module is connected to a detection point 1 of the power supply device through a control guide line, and the second end of the second communication module is connected to the control module; the first end of the second communication module is used to: receive the first control guide signal of the power supply device; the second communication module is used to: convert the reference negative voltage signal in the first control guide signal into a first negative voltage signal; the second end of the second communication module is used to: transmit the first negative voltage signal to the control module; the control module is used to: determine the first communication data sent by the power supply device based on the first negative voltage signal. The present application solution can not only realize the interaction of any communication data between the power supply device and the power receiving device, but also has the characteristics of simple implementation and low cost.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and is related to but not limited to a power receiving device and a communication method. Background Art

[0002] As the market share of new energy electric vehicles continues to increase, AC charging piles have been widely used in the field of charging technology due to their low cost.

[0003] In existing AC charging standards, AC charging piles can only adjust the charging current of electric vehicles by sending control guidance signals. AC charging piles and electric vehicles cannot support the interaction of other necessary information for orderly charging (such as electricity prices, scheduled charging information, etc.). Summary of the Invention

[0004] The present application provides a powered device, a communication method, a storage medium, and a computer program product, which can not only realize the interaction of arbitrary communication data between the power supply device and the powered device, but also have the characteristics of simple implementation and low cost.

[0005] The technical solution of this application is achieved as follows:

[0006] In a first aspect, the present application provides a powered device, comprising a first communication module and a control module, wherein a second communication module is added to the powered device and connected in parallel with the first communication module; a first end of the second communication module is connected to a detection point 1 of a power supply device via a control guide line, and a second end of the second communication module is connected to the control module;

[0007] The first end of the second communication module is used to: receive a first control guidance signal from the power supply device;

[0008] The second communication module is used to: convert the reference negative voltage signal in the first control guide signal into a first negative voltage signal;

[0009] The second end of the second communication module is used to: transmit the first negative voltage signal to the control module;

[0010] The control module is configured to determine first communication data sent by the power supply device based on the first negative voltage signal.

[0011] In a second aspect, the present application provides a communication method, which is applied to a powered device, the powered device including a first communication module, a control module, and a second communication module connected in parallel with the first communication module; the method comprising:

[0012] The second communication module receives a first control guidance signal from the power supply device;

[0013] The second communication module converts the reference negative voltage signal in the first control pilot signal into a first negative voltage signal;

[0014] The control module determines first communication data sent by the power supply device based on the first negative voltage signal.

[0015] In a third aspect, the present application provides another communication method, which is applied to a power supply device, wherein the power supply device is connected to a second communication module of a powered device; the method comprises:

[0016] receiving a second negative voltage signal sent by a second communication module of the powered device;

[0017] determining second communication data sent by the powered device based on the second negative voltage signal;

[0018] Wherein, when the second negative voltage signal is a third voltage value, determining that the second communication data is third information;

[0019] When the second negative voltage signal has a fourth voltage value, the second communication data is determined to be fourth information.

[0020] In a fourth aspect, the present application further provides a storage medium having a computer program stored thereon. When the computer program on the storage medium is executed, any one of the communication methods provided in the present application is implemented.

[0021] In a fifth aspect, the present application also provides a computer program product, including a computer program or instructions, which, when executed by a processor, implements any communication method provided in the present application.

[0022] The present application provides a powered device, a communication method, a storage medium, and a computer program product, wherein the powered device includes a first communication module and a control module, and a second communication module connected in parallel with the first communication module is added to the powered device; the first end of the second communication module is connected to a detection point 1 of a power supply device through a control guide line, and the second end of the second communication module is connected to the control module; the first end of the second communication module is used to: receive a first control guide signal of the power supply device; the second communication module is used to: convert a reference negative voltage signal in the first control guide signal into a first negative voltage signal; the second end of the second communication module is used to: transmit the first negative voltage signal to the control module; the control module is used to: determine the first communication data sent by the power supply device based on the first negative voltage signal.

[0023] In the solution of the present application, by adding a second communication module connected in parallel with the first communication module to the powered device, the second communication module can be used to convert the reference negative voltage signal in the first control pilot signal of the power supply device into a first negative voltage signal, thereby enabling the control module to determine the first communication data sent by the power supply device based on the first negative voltage signal. It can be seen that the solution of the present application fully considers that the existing AC charging standard does not effectively utilize the negative voltage signal in the control pilot signal. By adding a second communication module to the powered device, the second communication module can be used to convert the negative voltage signal in the control pilot signal into the first negative voltage signal, so that when the powered device detects the first negative voltage signal, it can determine the communication data sent by the power supply device based on the first negative voltage signal. In this way, not only can the interaction of arbitrary communication data between the power supply device and the powered device be achieved, but it also has the characteristics of simple implementation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a first optional structure of a powered device provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a first optional structure of a second communication module in a powered device provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of a second optional structure of the second communication module in the powered device provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of a second optional structure of the powered device provided in an embodiment of the present application;

[0028] Figure 5 A first optional flow chart of the communication method provided in the embodiment of the present application;

[0029] Figure 6 A second optional flow chart of the communication method provided in the embodiment of the present application;

[0030] Figure 7 A third optional flow chart of the communication method provided in the embodiment of the present application;

[0031] Figure 8 A fourth optional flow chart of the communication method provided in the embodiment of the present application;

[0032] Figure 9 A fifth optional flow chart of the communication method provided in the embodiment of the present application;

[0033] Figure 10This is an optional structural diagram of a control and guidance circuit diagram of an existing AC charging standard provided in an embodiment of the present application;

[0034] Figure 11 An optional schematic diagram of a control timing diagram of an existing AC charging standard provided in an embodiment of the present application;

[0035] Figure 12 A schematic diagram of an optional structure of the AC control guidance circuit provided in an embodiment of the present application;

[0036] Figure 13 An optional flowchart of the AC controlled orderly charging method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0038] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0039] In the following description, the terms "first, second, and third" are used merely as examples to distinguish between different objects and do not represent a specific order or precedence for the objects. It is understood that the specific order or precedence of "first, second, and third" can be interchanged where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0041] Below, various embodiments of the powered device, communication method, storage medium, and computer program product provided in the embodiments of the present application are described.

[0042] In the first aspect, this embodiment provides a powered device, referring to Figure 1As shown, the powered device 10 includes a first communication module 101, a control module 102, and a second communication module 103 connected in parallel with the first communication module 101; a first end 1031 of the second communication module 103 is connected to a detection point 1 201 of the power supply device 20 via a control guide line, and a second end 1032 of the second communication module 103 is connected to the control module 102.

[0043] The first end 1031 of the second communication module 103 is used to: receive a first control guidance signal from the power supply device 20;

[0044] The second communication module 103 is used to: convert the reference negative voltage signal in the first control pilot signal into a first negative voltage signal;

[0045] The second terminal 1032 of the second communication module 103 is used to transmit the first negative voltage signal to the control module 102;

[0046] The control module 102 is configured to determine the first communication data sent by the power supply device 20 based on the first negative voltage signal.

[0047] in:

[0048] The power receiving device 10 can be any device capable of receiving electric energy. In one example, the power receiving device 10 can be an electric car or an electric motorcycle.

[0049] The power supply device 20 may be any device capable of providing electrical energy. In one example, the power supply device 20 may be an AC charging station.

[0050] The powered device 10 and the power supply device 20 are connected via an interface. The connection line between the powered device 10 and the power supply device 20 may include a control guide line 202. The connection line between the powered device 10 and the power supply device 20 may also include a connection confirmation signal line (CC signal line) and AC power transmission lines (L1, L2, L3, and N).

[0051] It should be noted that, in practice, the first communication module 101 and the control module 102 are original modules in the powered device 10. Through the first communication module 101 and the control module 102, the powered device 10 can adjust the charging current of the powered device 10 according to the duty cycle of the control guidance signal sent by the power supply device 20.

[0052] For the first end 1031 of the second communication module 103:

[0053] The first end 1031 of the second communication module 103 is connected to one end of the first communication module 101 , and is connected to the detection point 1 201 of the power supply device 20 via the control guide line 202 .

[0054] The first end 1031 of the second communication module 103 is configured to receive a first control guidance signal from the power supply device.

[0055] The first control pilot signal refers to a control pilot (CP) signal generated when the power supply device operates in a pulse width modulation (PWM) connection state.

[0056] The embodiment of the present application does not limit the specific value of the first control pilot signal, and can be configured according to actual conditions. For example, the first control pilot signal is a ±12V PWM wave.

[0057] In practice, the power supply device 20 generates and transmits a first control pilot signal. Because the first terminal 1031 of the second communication module 103 is connected to the detection point 1 201 of the power supply device 20 via the control pilot line 202, the first control pilot signal is transmitted via the detection point 1 201 and the control pilot line 202 to the first terminal 1031 of the second communication module 103 in the powered device 10.

[0058] For the second communication module 103:

[0059] The second communication module 103 is configured to convert the reference negative voltage signal in the first control pilot signal into a first negative voltage signal.

[0060] The embodiment of the present application does not limit the specific structure of the second communication module 103, and it can be configured according to actual conditions.

[0061] The reference negative voltage signal refers to a negative wave signal with a negative voltage value in the first control pilot signal.

[0062] The first negative voltage signal refers to a reference negative voltage signal converted by the second communication module.

[0063] The embodiment of the present application does not limit the specific values of the reference negative voltage signal and the first negative voltage signal, and can be configured according to actual conditions.

[0064] It should be noted that the voltage values of the reference negative voltage signal and the first negative voltage signal are both negative and different.

[0065] In one example, the second communication module 103 may include a diode and a resistor. The second communication module 103 receives the reference negative voltage signal in the first control pilot signal via the diode and converts the reference negative voltage signal into the first negative voltage signal via the resistor. For example, assuming the voltage value of the reference negative voltage signal is -12V, the voltage value of the first negative voltage signal may be -6V.

[0066] For the second end 1032 of the second communication module 103:

[0067] The second end 1032 of the second communication module 103 is connected to the other end of the first communication module 101 and is also connected to the control module 102 .

[0068] The second terminal 1032 of the second communication module 103 is used to transmit the first negative voltage signal to the control module 102 .

[0069] It is understandable that the first negative voltage signal is actually a voltage signal at the second terminal 1032 of the second communication module 103. Since the second terminal 1032 of the second communication module 103 is connected to the control module 102, the second terminal 1032 of the second communication module 103 can transmit the first negative voltage signal to the control module 102.

[0070] For the control module 102:

[0071] The control module 102 is connected to the first communication module 101 and the second communication module 103. The first communication module 101 and the second communication module 103 are connected in parallel.

[0072] The control module 102 is configured to determine the first communication data sent by the power supply device 20 based on the first negative voltage signal. The control module 102 may be any controller in the powered device 10 .

[0073] The first communication data refers to data sent by the power supply device 20 to the powered device 10. The embodiment of the present application does not limit the specific content of the first communication data, and can be configured according to actual conditions.

[0074] In an example, the control module 102 may determine that the first communication data is first information when the first negative voltage signal has a first voltage value; and determine that the first communication data is second information when the first negative voltage signal has a second voltage value.

[0075] For example, the control module 102 can determine that the first communication data is logic 0 and the first information is logic 0 when the voltage value of the first negative voltage signal is 0V; and determine that the first communication data is logic 1 and the second information is logic 1 when the voltage value of the first negative voltage signal is -6V.

[0076] Since the first negative voltage signal is actually the voltage signal at the second terminal 1032 of the second communication module 103, in actual implementation, a detection point can be added at the second terminal 1032 of the second communication module 103 in the powered device 10. The powered device 10 can determine that different first communication data sent by the power supply device 20 have been received by detecting different voltage values at the detection point. For example, when the powered device 10 detects that the voltage value at the detection point is 0V, it determines that a logic 0 has been received from the power supply device 20; and when the powered device 10 detects that the voltage value at the detection point is -6V, it determines that a logic 1 has been received from the power supply device 20.

[0077] It is understood that the above description is intended only to illustrate the physical layer logic used for data communication between the powered device 10 and the power supply device 20. This embodiment of the present application does not limit the logic of other layers (such as the protocol layer and application layer) used for data communication between the powered device 10 and the power supply device 20, and these layers may be configured based on actual circumstances.

[0078] In practice, when the power supply device 20 needs to send data to the powered device 10 , the power supply device 20 may determine the data to be sent based on any communication protocol, and the data to be sent is in the form of a sequence of logic 0s and logic 1s.

[0079] For example, when the power supply device 20 needs to send "electricity price 0.5 yuan / kWh" to the powered device 10, "01001110" can be used to represent "electricity price 0.5 yuan / kWh." Accordingly, when the power supply device 20 needs to send a logic 0, it can generate and send a first control pilot signal with a voltage value of 0V. When the powered device 10 detects that the voltage value of the first negative voltage signal at the second terminal 1032 of the second communication module 103 is 0V, it determines that the logic 0 sent by the power supply device 20 has been received. When the power supply device 20 needs to send a logic 1, it can generate and send a first control pilot signal with a voltage value of -12V. When the powered device 10 detects that the voltage value of the first negative voltage signal at the second terminal 1032 of the second communication module 103 is -6V, it determines that the logic 1 sent by the power supply device 20 has been received.

[0080] The powered device provided in the present application includes a first communication module and a control module, and a second communication module connected in parallel with the first communication module is added to the powered device; the first end of the second communication module is connected to the detection point 1 of the power supply device through a control guide line, and the second end of the second communication module is connected to the control module; the first end of the second communication module is used to: receive the first control guide signal of the power supply device; the second communication module is used to: convert the reference negative voltage signal in the first control guide signal into a first negative voltage signal; the second end of the second communication module is used to: transmit the first negative voltage signal to the control module; the control module is used to: determine the first communication data sent by the power supply device based on the first negative voltage signal.

[0081] In the solution of the present application, by adding a second communication module connected in parallel with the first communication module to the powered device, the second communication module can be used to convert the reference negative voltage signal in the first control pilot signal of the power supply device into a first negative voltage signal, thereby enabling the control module to determine the first communication data sent by the power supply device based on the first negative voltage signal. It can be seen that the solution of the present application fully considers that the existing AC charging standard does not effectively utilize the negative voltage signal in the control pilot signal. By adding a second communication module to the powered device, the second communication module can be used to convert the negative voltage signal in the control pilot signal into the first negative voltage signal, so that when the powered device detects the first negative voltage signal, it can determine the communication data sent by the power supply device based on the first negative voltage signal. In this way, not only can the interaction of arbitrary communication data between the power supply device and the powered device be achieved, but it also has the characteristics of simple implementation and low cost.

[0082] Next, the specific structure of the second communication module 103 is described.

[0083] In one possible implementation, reference Figure 2 As shown, the second communication module 103 includes a diode 1033, a first resistor 1034 and a second resistor 1035; the first end 1031 of the second communication module 103 is the cathode of the diode 1033; the second end 1032 of the second communication module 103 is the anode of the diode 1033; the first resistor 1034 and the second resistor 1035 are connected in parallel to form a first parallel loop 1036; the first end 10361 of the first parallel loop 1036 is connected to the anode of the diode 1033; and the second end 10362 of the first parallel loop 1036 is connected to the ground end 1037.

[0084] The diode 1033 is used to transmit the reference negative voltage signal in the first control pilot signal transmitted by the first terminal 1031 of the second communication module 103 to the first parallel loop 1036 ;

[0085] The first parallel circuit 1036 is used to convert the reference negative voltage signal into the first negative voltage signal and transmit the first negative voltage signal to the second end 1032 of the second communication module 103 .

[0086] in:

[0087] For diode 1033:

[0088] The cathode of the diode 1033 is the first end 1031 of the second communication module 103 ; the anode of the diode 1033 is the second end 1032 of the second communication module 103 ; and the anode of the diode 1033 is connected to the first end 10361 of the first parallel loop 1036 .

[0089] The diode 1033 is used to divide the first control pilot signal transmitted from the first terminal 1031 of the second communication module 103 to obtain a reference negative voltage signal; and transmit the reference negative voltage signal to the first parallel loop 1036 .

[0090] Since the cathode of the diode 1033 is the first end 1031 of the second communication module 103, according to the conduction characteristics of the diode, the diode 1033 can divide the voltage in the first control pilot signal transmitted by the first end 1031 of the second communication module 103, and conduct the negative wave signal with a negative voltage value in the first control pilot signal to obtain a reference negative voltage signal.

[0091] For the first parallel circuit 1036:

[0092] The first parallel loop 1036 is formed by connecting the first resistor 1034 and the second resistor 1035 in parallel. The first end 10361 of the first parallel loop 1036 is connected to the anode of the diode 1033 . The second end 10362 of the first parallel loop 1036 is connected to the ground 1037 .

[0093] The first parallel loop 1036 is used to convert the reference negative voltage signal into the first negative voltage signal and transmit the first negative voltage signal to the second end 1032 of the second communication module 103 .

[0094] Because first parallel loop 1036 is formed by the first resistor 1034 and the second resistor 1035 connected in parallel, the voltage value of the reference negative voltage signal changes after passing through first parallel loop 1036, becoming a first negative voltage signal having a voltage value different from the reference negative voltage signal. For example, assuming the voltage value of the reference negative voltage signal is -12V, the voltage value of the first negative voltage signal obtained after the -12V reference negative voltage signal passes through first parallel loop 1036 may be -6V.

[0095] The embodiment of the present application does not limit the specific types of the diode 1033, the first resistor 1034, and the second resistor 1035, which can be configured according to actual conditions. For example, the first resistor 1034 can be 2740 ohms, and the second resistor 1035 can be 1300 ohms.

[0096] Simply put, by setting a diode, a first resistor and a second resistor to form a second communication module, it is possible to receive the reference negative voltage signal in the first control pilot signal through the diode, and convert the reference negative voltage signal into a first negative voltage signal through the first resistor and the second resistor, thereby realizing the interaction of arbitrary communication data between the power supply device and the powered device based on the negative voltage signal in the control pilot signal. The implementation scheme is simple, flexible and low-cost.

[0097] The powered device 10 provided in the embodiment of the present application can also send data to the power supply device 20 .

[0098] Reference Figure 1 As shown, the powered device 10 includes a first communication module 101, a control module 102, and a second communication module 103 connected in parallel with the first communication module 101; a first end 1031 of the second communication module 103 is connected to a detection point 1 201 of the power supply device 20 via a control guide line, and a second end 1032 of the second communication module 103 is connected to the control module 102.

[0099] The control module 102 is further configured to: determine a switch signal based on second communication data to be sent to the power supply device;

[0100] The second end 1032 of the second communication module 103 is further used to: transmit the switch signal to the second communication module 103;

[0101] The second communication module 103 is further configured to convert the second control pilot signal into a second negative voltage signal based on the switch signal; wherein the second control pilot signal is sent by the power supply device 20 to the second communication module 103;

[0102] The first terminal 1031 of the second communication module 103 is further configured to send the second negative voltage signal to the detection point 1 201 of the power supply device 20 , so that the power supply device 20 determines the second communication data sent by the powered device 10 based on the second negative voltage signal at the detection point 1 201 .

[0103] in:

[0104] For the control module 102:

[0105] The control module 102 is further configured to determine a switch signal based on second communication data to be sent to the power supply device.

[0106] The second communication data refers to data to be sent by the powered device 10 to the power supply device 20. The embodiment of the present application does not limit the specific content of the second communication data, and can be configured according to actual conditions.

[0107] It is understandable that the second communication data may be the same as or different from the first communication data.

[0108] The switch signal refers to an electrical signal used to control the on / off of a specific switch in the second communication module. The embodiment of the present application does not limit the specific content of the switch signal and can be configured according to actual conditions.

[0109] In one example, the control module 102 may determine that the switch signal is a switch-off signal when the second communication data is third information; and determine that the switch signal is a switch-on signal when the second communication data is fourth information.

[0110] For example, the control module 102 may determine that the switch signal is a switch disconnect signal when the second communication data is logic 0 (the third information is logic 0); and may determine that the switch signal is a switch close signal when the second communication data is logic 1 (the fourth information is logic 1).

[0111] For the second end 1032 of the second communication module 103:

[0112] The second end 1032 of the second communication module 103 is further used to transmit the switch signal to the second communication module 103 .

[0113] For the second communication module 103:

[0114] The second communication module 103 is further configured to convert the second control pilot signal into a second negative voltage signal based on the switch signal.

[0115] The second control guidance signal is sent by the power supply device 20 to the second communication module 103 .

[0116] The second control pilot signal is a control pilot signal (CP) generated when the power supply device is operating in a PWM connection state. The present embodiment does not limit the specific value of the second control pilot signal and can be configured based on actual conditions. For example, the second control pilot signal is a 0V to -12V PWM wave.

[0117] It can be understood that the second control pilot signal may be the same as or different from the first control pilot signal.

[0118] In one example, the second communication module 103 may include a resistor 1, a resistor 2, and a switch, wherein the resistor 1 is connected in parallel with the series-connected resistor 2 and the switch. The second communication module 103 connects or disconnects the resistor 2 by turning the switch on and off. The second communication module 103 converts the second control pilot signal into a second negative voltage signal through the resistor 1, or the resistor 1 and the resistor 2. For example, when the voltage value of the second control pilot signal is -12V, when the switch is open, the second control pilot signal with a voltage value of -12V is converted into a second negative voltage signal with a voltage value of -9V through the resistor 1; when the switch is closed, the second control pilot signal with a voltage value of -12V is converted into a second negative voltage signal with a voltage value of -6V through the resistor 1 and the resistor 2.

[0119] For the first end 1031 of the second communication module 103:

[0120] The first terminal 1031 of the second communication module 103 is further configured to send the second negative voltage signal to the detection point 1 201 of the power supply device 20 , so that the power supply device 20 determines the second communication data sent by the powered device 10 based on the second negative voltage signal of the detection point 1 201 .

[0121] It is understood that the second negative voltage signal is actually the voltage signal at the first terminal 1031 of the second communication module 103 of the powered device 10, or the voltage signal at the detection point 1 201 of the power supply device 20. Because the first terminal 1031 of the second communication module 103 is connected to the detection point 1 201 of the power supply device 20 via the control guide line 202, the first terminal 1031 of the second communication module 103 can transmit the second negative voltage signal to the detection point 1 201 of the power supply device 20.

[0122] The embodiment of the present application does not limit the specific manner in which the power supply device 20 determines the second communication data sent by the powered device 10 based on the second negative voltage signal of the detection point 1 201 , and can be configured according to actual conditions.

[0123] In one example, the power supply device 20 can determine that the second communication data is third information when the second negative voltage signal at the detection point 1 201 is the third voltage value; and determine that the second communication data is fourth information when the second negative voltage signal is the fourth voltage value.

[0124] For example, the power supply device 20 can determine that the second communication data is logic 0 and the third information is logic 0 when the voltage value of the second negative voltage signal at the detection point 1 201 is -9V; and determine that the second communication data is logic 1 and the fourth information is logic 1 when the voltage value of the second negative voltage signal at the detection point 1 201 is -6V.

[0125] Since the first end 1031 of the second communication module 103 is connected to the detection point 1 201 of the power supply device 20 via the control guide line 202, and the second negative voltage signal is actually the voltage signal at the second end 1031 of the second communication module 103 or the voltage signal at the detection point 1 201 of the power supply device 20, in actual implementation, the power supply device 20 can determine that different second communication data sent by the powered device 10 have been received by detecting different voltage values at the detection point 1 201. For example, when the power supply device 20 detects a voltage value of -9V at the detection point 1 201, it determines that a logic 0 has been received from the powered device 10; and when the power supply device 20 detects a voltage value of -6V at the detection point 1 201, it determines that a logic 1 has been received from the powered device 10.

[0126] It is understood that the above description is intended only to illustrate the physical layer logic used for data communication between the powered device 10 and the power supply device 20. This embodiment of the present application does not limit the logic of other layers (such as the protocol layer and application layer) used for data communication between the powered device 10 and the power supply device 20, and these layers may be configured based on actual circumstances.

[0127] In practice, when the powered device 10 needs to send data to the power supply device 20 , the powered device 10 may determine the data to be sent based on any communication protocol, and the data to be sent is in the form of a sequence of logic 0s and logic 1s.

[0128] For example, when the powered device 10 needs to send "charging starts at 8 o'clock" to the power supply device 20, "10110010" can be used to represent "charging starts at 8 o'clock." Accordingly, when the powered device 10 needs to send a logic 0, it can disconnect a specific switch in the second communication module 103. When the power supply device 20 detects a second negative voltage signal at detection point 1 201 with a voltage value of -9V, it determines that the logic 0 sent by the powered device 10 has been received. When the powered device 10 needs to send a logic 1, it can connect a specific switch in the second communication module 103. When the power supply device 20 detects a second negative voltage signal at detection point 1 201 with a voltage value of -6V, it determines that the logic 1 sent by the powered device 10 has been received.

[0129] Simply put, given that existing AC charging standards don't effectively utilize the negative voltage signal in the control pilot signal, adding a second communication module to the powered device allows it to convert the power supply device's second control pilot signal into a second negative voltage signal. This allows the power supply device to detect the second negative voltage signal at detection point one and then determine the second communication data sent by the powered device based on the second negative voltage signal. This approach not only enables the exchange of arbitrary communication data between the power supply device and the powered device, but also offers simple implementation and low cost.

[0130] Next, the specific structure of the second communication module 103 is described.

[0131] In another possible embodiment, referring to Figure 3 As shown, the second communication module 103 includes a diode 301, a first resistor 302, a second resistor 303 and a first switch 304; the first end 1031 of the second communication module 103 is the cathode of the diode 301; the second end 1032 of the second communication module 103 is the anode of the diode 301; the first resistor 302 is connected in parallel with the second resistor 303 and the first switch 304 connected in series to form a second parallel loop 305; the first end 3051 of the second parallel loop 305 is connected to the anode of the diode 301; and the second end 3052 of the second parallel loop 305 is connected to the ground 306.

[0132] The second parallel circuit 305 is configured to close or open the first switch 304 based on the switch signal transmitted by the second terminal 1032 of the second communication module 103 to obtain the second negative voltage signal; wherein the closing or opening of the first switch 304 corresponds to different values of the second negative voltage signal;

[0133] The diode 301 is configured to transmit the second negative voltage signal to the first terminal 1031 of the second communication module 103 .

[0134] in:

[0135] For the second parallel circuit 305:

[0136] The first end 3051 of the second parallel loop 305 is connected to the anode of the diode 301 ; the anode of the diode 301 is the second end 1032 of the second communication module 103 ; and the second end 3052 of the second parallel loop 305 is connected to the ground 306 .

[0137] The second parallel loop 305 is configured to close or open the first switch 304 based on the switch signal transmitted by the second terminal 1032 of the second communication module 103 to obtain the second negative voltage signal.

[0138] Because the second parallel circuit 305 is formed by the first resistor 302, the second resistor 303 connected in series, and the first switch 304 in parallel, the voltage value of the second control pilot signal changes after passing through the second parallel circuit 305, becoming a second negative voltage signal different from the voltage value of the second control pilot signal. For example, if the voltage value of the second control pilot signal is -12V, when the switch signal is a switch-off signal, the first switch 304 is open, the first resistor 302 is connected, and the second resistor 303 is not connected, then the voltage value of the second negative voltage signal obtained by the second control pilot signal having a voltage value of -12V after passing through the second parallel circuit 305 may be -9V. When the switch signal is a switch-on signal, the first switch 304 is closed, the first resistor 302 is connected, and the second resistor 303 is also connected, then the voltage value of the second negative voltage signal obtained by the second control pilot signal having a voltage value of -12V after passing through the second parallel circuit 305 may be -6V.

[0139] The embodiment of the present application does not limit the specific types of the first resistor 302, the second resistor 303, and the first switch 304, and they can be configured according to actual conditions. For example, the first resistor 302 can be 2740 ohms, and the second resistor 303 can be 1300 ohms.

[0140] For diode 301:

[0141] The cathode of the diode 301 is the first end 1031 of the second communication module 103 ; the anode of the diode 301 is the second end 1032 of the second communication module 103 ; and the anode of the diode 301 is connected to the first end 3051 of the second parallel loop 305 .

[0142] The diode 301 is configured to transmit the second negative voltage signal to the first terminal 1031 of the second communication module 103 .

[0143] The embodiment of the present application does not limit the specific type of the diode 301, and it can be configured according to actual conditions.

[0144] Simply put, by setting a diode, a first resistor, a second resistor and a first switch to form a second communication module, the second resistor can be connected or disconnected by controlling the on and off of the first switch, so that the total resistance value of the second parallel circuit is the first resistor, or the first resistor and the second resistor can convert the second control guide signal into a second negative voltage signal of a different voltage value through the second parallel circuit. The implementation scheme is simple, efficient, flexible and reliable.

[0145] The powered device 10 provided in the embodiment of the present application may further include a second switch.

[0146] Reference Figure 4As shown, the powered device 10 includes, in addition to the first communication module 101, the control module 102, and the second communication module 103, a second switch 104. A first end of the second switch 104 is connected to a detection point 1 201 of the power supply device 20 via a control guide line 202; a second end of the second switch 104 is connected to a first end 1031 of the second communication module 103.

[0147] The second switch 104 is used to: when the second switch 104 is closed, conduct the circuit between the power supply device 20 and the second communication module 103; when the second switch 104 is open, disconnect the circuit between the power supply device 20 and the second communication module 104.

[0148] The embodiment of the present application does not limit the specific type of the second switch 104, and can be configured according to actual conditions.

[0149] Simply put, by providing a second switch in the powered device, the circuit between the power supply device and the second communication module can be opened or closed depending on whether the second switch is on or off. When the powered device and the power supply device need to communicate data, the second switch can be closed, enabling the negative-wave communication function between the powered device and the power supply device. When data communication is no longer necessary, the second switch can be opened, disabling the negative-wave communication function between the powered device and the power supply device. This enables negative-wave communication between the powered device and the power supply device based on existing AC charging standards without affecting the orderly charging process in existing AC charging standards, which regulates the charging current of the powered device based on the duty cycle of the control guidance signal sent by the power supply device. This solution is simple, efficient, flexible, and reliable.

[0150] In a second aspect, this embodiment of the present application provides a communication method, which is applied to a powered device.

[0151] The powered device includes a first communication module, a control module, and a second communication module connected in parallel with the first communication module.

[0152] For the first communication module, the control module, and the second communication module, reference may be made to the detailed description of the first aspect above, which will not be repeated here.

[0153] refer to Figure 5 As shown in the content, the communication method may include but is not limited to S501 to S503.

[0154] S501: The powered device receives a first control guidance signal from the power supply device through the second communication module.

[0155] For the specific implementation process of S501, reference may be made to the above-mentioned specific description of the first end of the second communication module, which will not be described in detail here.

[0156] S502: The powered device converts the reference negative voltage signal in the first control guide signal into a first negative voltage signal through the second communication module.

[0157] For the specific implementation process of S502, reference may be made to the above-mentioned detailed description of the second communication module, which will not be repeated here.

[0158] S503: The powered device determines, through the control module and based on the first negative voltage signal, first communication data sent by the power supply device.

[0159] For the specific implementation process of S503, reference may be made to the above-mentioned specific description of the control module, which will not be repeated here.

[0160] A communication method provided in an embodiment of the present application is applied to a powered device, wherein the powered device includes a first communication module, a control module, and a second communication module connected in parallel with the first communication module; the method includes: the second communication module receives a first control guidance signal of a power supply device; the second communication module converts a reference negative voltage signal in the first control guidance signal into a first negative voltage signal; and the control module determines, based on the first negative voltage signal, first communication data sent by the power supply device.

[0161] This solution takes into account the fact that existing AC charging standards do not effectively utilize the negative voltage signal in the control pilot signal. By adding a second communication module to the powered device, this module can be used to convert the negative voltage signal in the control pilot signal into a first negative voltage signal. This allows the powered device to determine the communication data sent by the power supply device based on the first negative voltage signal when it detects the first negative voltage signal. This not only enables the exchange of arbitrary communication data between the power supply device and the powered device, but also features simple implementation and low cost.

[0162] The following describes a process in which the powered device determines, through the control module, the first communication data sent by the power supply device based on the first negative voltage signal in S503.

[0163] refer to Figure 6 The process may include but is not limited to the following S601 and S602.

[0164] S601: When the first negative voltage signal is a first voltage value, the powered device determines that the first communication data is first information.

[0165] The embodiment of the present application does not limit the specific value of the first voltage value, and can be configured according to actual conditions. It is understandable that since the first negative voltage signal is a negative voltage signal, the first voltage value must also be a negative value (including 0V).

[0166] The embodiment of the present application does not limit the specific content of the first information, and can be configured according to actual conditions. For example, the first information can be a logic 0.

[0167] Exemplarily, S601 may be implemented as follows: the powered device determines whether the first negative voltage signal is a first voltage value, and if so, determines that the first communication data is the first information.

[0168] For example, the powered device determines whether the first negative voltage signal is 0V, and if so, determines that a logic 0 sent by the power supply device is received.

[0169] In practice, data communication between the powered device and the power supply device is carried out using binary data. Binary data is composed of logic 0 and logic 1. The powered device can obtain the communication data sent by the power supply device by receiving logic 0 and logic 1.

[0170] It should be understood that the communication methods provided in the embodiments of this application are intended only to illustrate the physical layer logic used for data communication between a powered device and a power supply device. The embodiments of this application do not limit the logic used at other layers (e.g., protocol layer, application layer, etc.) during data communication between the powered device and the power supply device, and these logic can be configured based on actual circumstances.

[0171] S602: When the first negative voltage signal has a second voltage value, the powered device determines that the first communication data is second information.

[0172] The embodiment of the present application does not limit the specific value of the second voltage value, and can be configured according to actual conditions. It can be understood that since the first negative voltage signal is a negative voltage signal, the second voltage value must also be a negative value (including 0V).

[0173] The embodiment of the present application does not limit the specific content of the second information, and can be configured according to actual conditions. For example, the second information can be a logic 1.

[0174] Exemplarily, S602 may be implemented as follows: the powered device determines whether the first negative voltage signal is the second voltage value, and if so, determines that the first communication data is the second information.

[0175] For example, the powered device determines whether the first negative voltage signal is -6V, and if so, determines that the logic 1 sent by the power supply device is received.

[0176] It should be noted that there is no strict execution order between S601 and S602.

[0177] Simply put, by determining whether the first negative voltage signal is the first voltage value or the second voltage value, it can be determined whether the first communication data received from the power supply device is the first information or the second information. This allows the powered device to accurately receive the first communication data sent by the power supply device, ensuring the accuracy of the received data.

[0178] The communication method provided in the embodiment of the present application may further include a data sending process of the powered device.

[0179] refer to Figure 7 The process may include but is not limited to the following S701 to S703.

[0180] S701: The powered device determines a switch signal through the control module based on second communication data to be sent to the power supply device.

[0181] For the specific implementation process of S701, reference may be made to the above-mentioned detailed description of the control module, which will not be repeated here.

[0182] S702: The powered device converts the second control pilot signal into a second negative voltage signal based on the switch signal via the second communication module.

[0183] The second control guidance signal is sent by the power supply device to the second communication module.

[0184] For the specific implementation process of S702, reference may be made to the above-mentioned detailed description of the second communication module, which will not be repeated here.

[0185] S703: The powered device sends the second negative voltage signal to the power supply device through the second communication module, so that the power supply device determines the second communication data sent by the powered device based on the second negative voltage signal.

[0186] For the specific implementation process of S703, reference may be made to the above-mentioned specific description of the first end of the second communication module, which will not be described in detail here.

[0187] Simply put, by determining different switching signals based on different second communication data to be sent to the power supply device, the second control signal can be converted into a second negative voltage signal based on the switching signal. This second negative voltage signal is then used to transmit data from the powered device to the power supply device. This allows the powered device to accurately transmit the second communication data, ensuring the accuracy of the transmitted data.

[0188] In a third aspect, this embodiment of the present application provides another communication method, which is applied to a power supply device.

[0189] The power supply device is connected to the second communication module of the powered device.

[0190] For the second communication module of the powered device, reference may be made to the detailed description of the first aspect above, which will not be repeated here.

[0191] refer to Figure 8 As shown in the content, the communication method may include but is not limited to S801 and S802.

[0192] S801: A power supply device receives a second negative voltage signal sent by a second communication module of a powered device.

[0193] Exemplarily, S801 may be implemented as follows: the power supply device receives, via the receiving module, a second negative voltage signal sent by the second communication module of the powered device.

[0194] S802: The power supply device determines second communication data sent by the powered device based on the second negative voltage signal.

[0195] Wherein, when the second negative voltage signal is a third voltage value, determining that the second communication data is third information;

[0196] When the second negative voltage signal has a fourth voltage value, the second communication data is determined to be fourth information.

[0197] The embodiment of the present application does not limit the specific values of the third voltage value and the fourth voltage value, and can be configured according to actual conditions. It can be understood that since the second negative voltage signal is a negative voltage signal, the third voltage value and the fourth voltage value must also be negative values.

[0198] The embodiment of the present application does not limit the specific content of the third information and the fourth information, and can be configured according to actual conditions. For example, the third information can be a logic 0, and the fourth information can be a logic 1.

[0199] Exemplarily, S802 can be implemented as: the power supply device determines whether the second negative voltage signal is the third voltage value or the fourth voltage value; if the second negative voltage signal is the third voltage value, the second communication data is determined to be the third information; if the second negative voltage signal is the fourth voltage value, the second communication data is determined to be the fourth information.

[0200] For example, the power supply device determines whether the second negative voltage signal is -9V or -6V; if the second negative voltage signal is -9V, it determines that a logic 0 sent by the powered device is received; if the second negative voltage signal is -6V, it determines that a logic 1 sent by the powered device is received.

[0201] In practice, data communication between the power supply device and the powered device is carried out using binary data. Binary data is composed of logic 0 and logic 1. The power supply device can obtain the communication data sent by the powered device by receiving logic 0 and logic 1.

[0202] It should be understood that the communication methods provided in the embodiments of this application are intended only to illustrate the physical layer logic used for data communication between a power supply device and a powered device. The embodiments of this application do not limit the logic used at other layers (e.g., protocol layer, application layer, etc.) during data communication between the power supply device and the powered device, and these can be configured based on actual circumstances.

[0203] Simply put, by determining whether the second negative voltage signal is the third voltage value or the fourth voltage value, it can be determined that the second communication data received from the powered device is the third information or the fourth information. This allows the power supply device to accurately receive the second communication data sent by the powered device, ensuring the accuracy of the received data.

[0204] The communication method provided in the embodiment of the present application may also include a data sending process of the power supply device.

[0205] refer to Figure 9 As shown in the content, the communication method may include but is not limited to S901 and S902.

[0206] S901: The power supply device determines a first control guidance signal based on first communication data to be sent to the powered device.

[0207] When the first communication data is first information, the voltage value of the first control pilot signal is a fifth voltage value; when the first communication data is second information, the voltage value of the first control pilot signal is a sixth voltage value.

[0208] The embodiment of the present application does not limit the specific values of the fifth voltage value and the sixth voltage value, and can be configured according to actual conditions. It should be noted that the fifth voltage value and the sixth voltage value are both negative values (including 0).

[0209] Exemplarily, S901 can be implemented as follows: the power supply device determines whether the first communication data to be sent to the powered device is the first information or the second information; when the first communication data is the first information, the voltage value of the first control guidance signal is determined to be the fifth voltage value; when the first communication data is the second information, the voltage value of the first control guidance signal is determined to be the sixth voltage value.

[0210] For example, when the first communication data is logic 0, the power supply device determines that the voltage value of the first control pilot signal is 0V; when the first communication data is logic 1, the power supply device determines that the voltage value of the first control pilot signal is -12V.

[0211] S902: The power supply device sends the first control guidance signal to the powered device, so that the powered device determines the first communication data sent by the power supply device based on the first control guidance signal.

[0212] Exemplarily, S902 may be implemented as follows: the power supply device sends the first control guidance signal to the powered device through the sending module; correspondingly, the powered device receives and determines the first communication data sent by the power supply device based on the first control guidance signal.

[0213] Simply put, by determining first control guidance signals with different voltage values based on different first communication data to be sent to the powered device, the power supply device can transmit data to the powered device based on the first control guidance signals. This allows the power supply device to accurately transmit the first communication data, ensuring the accuracy of the transmitted data.

[0214] The following describes the powered device provided by this application through a detailed embodiment.

[0215] As new energy electric vehicles become increasingly popular, private charging stations are becoming more and more common. Since AC charging stations are cheaper than DC charging stations, more private charging stations are using AC charging stations, making them the mainstream choice. When multiple vehicles are charging simultaneously, the capacity is limited and the grid will overcharge. In this case, the grid will coordinate and charge the vehicles in sequence.

[0216] In the existing AC charging standard, the AC charging pile charging plug is connected to the vehicle charging seat, and the control and guidance circuit complies with the national standard charging interface standard GBT38487.1-2015. The control and guidance circuit diagram of the existing AC charging standard is as follows: Figure 10 As shown in the figure, in the AC charging control pilot circuit, the Connection Confirmation (CC) signal is the charging connection signal, and the Control Pilot (CP) signal is the charging control signal. The vehicle uses the CC signal to detect the RC resistor to confirm the connection status of the charging gun. The charging pile sends a PWM wave through the CP signal. After receiving the pulse width modulation (PWM) wave, the vehicle adjusts the charging current according to the PWM wave duty cycle. Figure 10As shown, the power supply device 1001 is connected to the vehicle interface 10021 of the electric car 1002 via the power supply interface 10011. The connection between the power supply interface 10011 and the vehicle interface 10021 includes: CP line 1003, CC line 1004, PE line 1005 and power lines 1006 (L1, L2, L3, and N). After the gun is plugged in, the detection point 2 (1002A) of the electric car 1002 becomes 9v, and then the electric car closes S2, and the detection point 1 (1001A) of the power supply device 1101 becomes 6v. As a result, the power supply device closes K1 and K2 to release 220vAC electricity. Figure 10 In the embodiment, the vehicle control device is equivalent to the above-mentioned control module, and the circuit composed of CP, D1, S2, R2, R3 and the vehicle body is equivalent to the above-mentioned first communication module.

[0217] The control timing diagram of the existing AC charging standard is as follows: Figure 11 As shown in the AC charging connection control timing diagram, S1 switches to the PWM wave state at T1' and returns to the 12V normal power state at T3'. The power supply device transmits the CP state: 12V normal power and ±12V PWM waves. Detection point 1 detects peak values of 12V, 9V, and 6V, with a minimum voltage of -12V. Because a diode is connected before detection point 2 to filter out negative voltages, detection point 2 detects peak voltage values of 12V, 9V, and 6V, with a minimum voltage of 0V. Detection point 1 detects the voltage of the CP signal, while detection point 2 detects the positive voltage of the CP signal. Detection point 3 detects the resistance of RC and R4, and the voltage of the CC signal.

[0218] As can be seen, in existing AC charging standards, charging piles notify vehicles via CP signals, and vehicles detect these signals to adjust the charging current. In other words, existing AC charging standards do not support two-way communication, preventing effective communication between vehicles and charging piles, and thus preventing the transmission of information necessary for orderly charging. Without effective communication between the charging pile and vehicle, other valid information cannot be transmitted between the two. Therefore, charging piles can only allocate power according to inherent rules when scheduling power allocation. For example, when a charging vehicle urgently needs to use its vehicle, the vehicle cannot synchronize information with the charging pile, and thus cannot increase the charging current.

[0219] To solve the above problems, this embodiment of the present application proposes an AC control guidance circuit and an AC orderly charging method, including:

[0220] New point 1: Based on the existing AC charging control pilot circuit, the CP circuit at the electric vehicle (equivalent to the above-mentioned power receiving device) end adds a transceiver control circuit, see Figure 12As shown, a CP undercurrent control circuit 120 (dashed box) (equivalent to the aforementioned second communication module) is added. Specifically, based on the existing AC charging control and guidance circuit, switches S4 (equivalent to the aforementioned second switch) and S5 (equivalent to the aforementioned first switch), a diode D2 (equivalent to the aforementioned diode), a detection point 5 (equivalent to the second end of the aforementioned second communication module), and resistors R5 (2740Ω) (equivalent to the aforementioned first resistor) and R6 (1300Ω) (equivalent to the aforementioned second resistor) are added to form the CP undercurrent control loop.

[0221] New point 2: The power supply device (equivalent to the above power supply device) controls the voltage of the PWM wave to different negative waves, so that the electric vehicle can receive different voltages at detection point 5. The electric vehicle controls the on and off switches S4 and S5, so that the power supply device can receive different voltages at detection point 1 (equivalent to detection point 1 above).

[0222] Function 1: The negative wave control circuit divides the PWM negative wave sent by the charging pile (CP) to control the voltage. When the voltage sent by the power supply control device is less than 0V, the protective earthing (PE) wire (equivalent to the ground terminal) forms a controllable circuit with the CP through R5, R6, D2, S4, and S5. The electric vehicle controls the switching of S4 and S5, and the power supply equipment receives different voltages at detection point 1, thus enabling signal transmission from the electric vehicle to the power supply equipment.

[0223] Function 2: The charging station (equivalent to the aforementioned power supply device) can control the minimum voltage of the CP PWM wave. This can be the newly added 0V state for communication, or other voltage values between 0V and -12V. It should be noted that in the embodiment of this application, this minimum voltage is -12V because the standard requires that the two states of 0V and -12V be combined to facilitate signal transmission. This enables signal transmission from the power supply device to the electric vehicle.

[0224] Once the power supply equipment and electric vehicles achieve two-way signal transmission, orderly charging function can be realized.

[0225] Next, the communication physical layer logic of the AC orderly charging method provided in this embodiment of the present application is described.

[0226] The power supply device sends a signal to the electric vehicle, closing the electric vehicle's pre-states S4 and S5, and switching the power supply device's pre-state S1 to a PWM wave. When a logic 0 (equivalent to the first information) is required, the power supply device's PWM negative wave (equivalent to the first control guidance signal) transmits a voltage of 0V (equivalent to the fifth voltage value). The voltage at the electric vehicle's detection point 5 (equivalent to the first negative voltage signal) is 0V (equivalent to the first voltage value). Accordingly, when the electric vehicle detects that the voltage at detection point 5 is 0V, it determines that the power supply device has received the logic 0 (equivalent to the first communication data). When a logic 1 (equivalent to the second information) is required, the power supply device's PWM negative wave (equivalent to the first control guidance signal) transmits a voltage of -12V (equivalent to the sixth voltage value). The voltage at the electric vehicle's detection point 5 (equivalent to the first negative voltage signal) is -6V (equivalent to the second voltage value). Accordingly, when the electric vehicle detects that the voltage at detection point 5 is -6V, it determines that the power supply device has received the logic 1 (equivalent to the first communication data). See Table 1 below for specific rules. The power supply device sends a signal to the electric vehicle.

[0227] Table 1 Power supply equipment sends signals to electric vehicles

[0228]

[0229] The electric vehicle sends a signal to the power supply device. The electric vehicle's pre-state S4 closes, and the power supply device's pre-state S1 switches to a PWM wave with a negative wave of -12V (equivalent to the second control pilot signal). When a logic 0 (equivalent to the third information) needs to be transmitted, the electric vehicle controls the S5 switch to open (equivalent to the switch signal). The negative wave voltage (equivalent to the second negative voltage signal) at detection point 1 of the power supply device is -9V (equivalent to the third voltage value). Accordingly, when the power supply device detects the voltage at detection point 1 as -9V, it determines that the electric vehicle has received a logic 0 (equivalent to the second communication data). When a logic 1 (equivalent to the fourth information) needs to be transmitted, the electric vehicle controls the S5 switch to close (equivalent to the switch signal). The negative wave voltage (equivalent to the second negative voltage signal) at detection point 1 of the power supply device is -6V (equivalent to the fourth voltage value). Accordingly, when the power supply device detects the voltage at detection point 1 as -6V, it determines that the electric vehicle has received a logic 1 (equivalent to the second communication data). For specific rules, see Table 2 below. The electric vehicle sends a signal to the power supply device.

[0230] Table 2 Electric vehicles send signals to power supply equipment

[0231]

[0232] Next, the application layer logic of the AC orderly charging method provided in this embodiment of the present application is described.

[0233] The application layer process of the AC orderly charging method can be found in Figure 4 As shown, the following steps are included:

[0234] S401. Insert the charging gun of the power supply device into the charging seat of the electric vehicle.

[0235] S402: The power supply device determines whether it supports CP negative wave communication and orderly charging. If so, execute S403; otherwise, execute S404.

[0236] S403: The power supply device sends a CP negative wave communication identification signal to the electric vehicle.

[0237] S404: The power supply equipment and the electric vehicle begin a standard charging process.

[0238] S405: The electric vehicle determines whether it supports CP negative wave communication and orderly charging. If so, it executes S406; otherwise, it executes S404.

[0239] S406. The electric vehicle sends a signal to the power supply device to support CP negative wave communication and orderly charging.

[0240] S407: The power supply equipment and the electric vehicle begin negative wave communication and orderly charging process.

[0241] S408. Pull out the charging gun of the power supply equipment from the charging seat of the electric vehicle.

[0242] The power supply device sends a CP negative wave communication identification signal. After receiving the CP negative wave communication identification signal, the electric vehicle identifies whether the power supply device supports CP negative wave communication. After confirming that the power supply device supports CP negative wave communication, the electric vehicle sends a message to the power supply device that it supports orderly charging service. After the power supply device receives the electric vehicle's support for CP negative wave communication and supports orderly charging, the power supply device and the electric vehicle enter orderly charging until the power supply device's charging gun is unplugged from the electric vehicle's charging station. In the orderly charging service, the power supply device can identify information such as the power supply capacity of the power grid, the power demand of the electric vehicle, and the number of vehicles connected to the power supply device. Based on this information, it can dynamically adjust the charging current of each vehicle to ensure the load capacity of the power grid and meet the charging needs of the vehicles.

[0243] The beneficial effects of the AC orderly charging method provided by this embodiment of the present application include: 1. Supporting orderly charging functions, supporting communication between vehicles and charging piles through CP negative wave communication, ensuring the load capacity of the power grid and meeting the charging needs of vehicles. 2. Low cost, adding a negative wave control circuit on the vehicle side, and supporting 0v / -12v switching of the low-voltage end of the CP PWM wave on the charging pile side. By adding vehicle-side control of the CP signal negative wave, the minimum voltage of detection point 1 can be changed, thereby realizing vehicle-to-charging pile communication; the charging pile side can control the minimum voltage of the CP PWM wave, and a new detection point 5 is added. Detection point 5 can detect the minimum voltage values of different CPs sent by the charging pile side, thereby realizing charging pile-to-vehicle communication. Through CP negative wave communication, the vehicle and the charging pile establish an orderly charging service. During the service, the power supply equipment identifies information such as the power supply capacity of the power grid, the power demand of the electric vehicle, and the number of vehicles connected to the power supply equipment, and dynamically adjusts the charging current of each vehicle to ensure the load capacity of the power grid and meet the charging needs of the vehicle.

[0244] It should be noted that, first, the newly added CP negative wave control circuit at the vehicle end can be the CP negative wave control circuit provided in this embodiment of the present application, or other circuits capable of changing the negative voltage at detection point 1. Second, the pile end can control the minimum voltage of the CPPWM wave, which can be the newly added 0v state in the negative wave communication, or other voltage values between 0v and -12v. Third, the orderly charging service process can be the signal transmission process provided in this embodiment of the present application ( Figure 4 ), or it can be a signal transmission process in which other signals can interact with each other by handshake.

[0245] In a fourth aspect, the present application further provides a storage medium having a computer program stored thereon. When the computer program on the storage medium is executed, any one of the communication methods provided in the embodiments of the present application is implemented.

[0246] It should be noted that the description of the storage medium is similar to the description of the communication method described above, and has the same beneficial effects as the communication method, so it will not be repeated here. In addition, for technical details not disclosed in the device embodiments of this application, please refer to the description of the communication method embodiment.

[0247] In a fifth aspect, the present application also provides a computer program product, including a computer program or instructions, which, when executed by a processor, implements any communication method provided in the present application.

[0248] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0249] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0250] In addition, the functional units in the embodiments of the present invention may all be integrated into one processing module, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units. A person skilled in the art will understand that all or part of the steps of the above-mentioned method embodiments may be completed by hardware related to program instructions, and the above-mentioned program may be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiments; and the above-mentioned storage medium includes various media that can store program codes, such as mobile storage devices, read-only memories (ROMs), random access memories (RAMs), magnetic disks or optical disks.

[0251] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0252] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0253] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0254] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A powered device, comprising a first communication module and a control module, characterized in that: A second communication module connected in parallel with the first communication module is added to the powered device; a first end of the second communication module is connected to detection point 1 of the power supply device via a control guide line, and a second end of the second communication module is connected to the control module; the second communication module includes a diode, a first resistor, and a second resistor; the first resistor and the second resistor are connected in parallel to form a first parallel circuit; The first end of the second communication module is used to: receive a first control guidance signal from the power supply device; The diode is used to: transmit the reference negative voltage signal in the first control pilot signal transmitted by the first end of the second communication module to the first parallel circuit; The first parallel circuit is used to: convert the reference negative voltage signal into a first negative voltage signal and transmit the first negative voltage signal to the second end of the second communication module; The second end of the second communication module is used to: transmit the first negative voltage signal to the control module; The control module is configured to determine first communication data sent by the power supply device based on the first negative voltage signal.

2. The power receiving device according to claim 1, wherein: The second end of the second communication module is the anode of the diode; the first end of the first parallel loop is connected to the anode of the diode; and the second end of the first parallel loop is connected to the ground.

3. The power receiving device according to claim 1, wherein: The control module is further configured to: determine a switch signal based on second communication data to be sent to the power supply device; The second end of the second communication module is further used to: transmit the switch signal to the second communication module; The second communication module is further configured to: convert a second control pilot signal into a second negative voltage signal based on the switch signal; wherein the second control pilot signal is sent by the power supply device to the second communication module; The first end of the second communication module is further used to: send the second negative voltage signal to detection point 1 of the power supply device, so that the power supply device determines the second communication data sent by the powered device based on the second negative voltage signal at detection point 1.

4. The power receiving device according to claim 3, wherein: The second communication module includes a diode, a first resistor, a second resistor, and a first switch; the first end of the second communication module is the cathode of the diode; the second end of the second communication module is the anode of the diode; the first resistor, the second resistor connected in series, and the first switch are connected in parallel to form a second parallel loop; the first end of the second parallel loop is connected to the anode of the diode; and the second end of the second parallel loop is connected to the ground. The second parallel circuit is configured to: close or open the first switch based on a switch signal transmitted by the second end of the second communication module to obtain the second negative voltage signal; wherein the closing or opening of the first switch corresponds to different values of the second negative voltage signal; The diode is used to transmit the second negative voltage signal to the first end of the second communication module.

5. The powered device according to claim 1, wherein: The powered device further includes a second switch; a first end of the second switch is connected to the detection point 1 via the control guide line; a second end of the second switch is connected to the first end of the second communication module; The second switch is used to: conduct the circuit between the power supply device and the second communication module when the second switch is closed; and disconnect the circuit between the power supply device and the second communication module when the second switch is open.

6. A communication method, characterized in that: The method is applied to a powered device, the powered device including a first communication module, a control module, and a second communication module connected in parallel with the first communication module; the second communication module including a diode, a first resistor, and a second resistor; the first resistor and the second resistor are connected in parallel to form a first parallel circuit; the method includes: The second communication module receives a first control guidance signal from the power supply device; The diode transmits the reference negative voltage signal in the first control pilot signal transmitted by the first end of the second communication module to the first parallel loop; The first parallel circuit converts the reference negative voltage signal into a first negative voltage signal and transmits the first negative voltage signal to the second end of the second communication module; the second end of the second communication module transmits the first negative voltage signal to the control module; The control module determines first communication data sent by the power supply device based on the first negative voltage signal.

7. The communication method according to claim 6, wherein: The determining, based on the first negative voltage signal, first communication data sent by the power supply device includes: When the first negative voltage signal is a first voltage value, determining that the first communication data is first information; When the first negative voltage signal is a second voltage value, the first communication data is determined to be second information.

8. The communication method according to claim 6, wherein: The method further comprises: The control module determines a switch signal based on second communication data to be sent to the power supply device; The second communication module converts the second control pilot signal into a second negative voltage signal based on the switch signal; wherein the second control pilot signal is sent by the power supply device to the second communication module; The second communication module sends the second negative voltage signal to the power supply device, so that the power supply device determines the second communication data sent by the powered device based on the second negative voltage signal.

9. A communication method, characterized in that: The method is applied to a power supply device, wherein the power supply device is connected to a second communication module of a powered device; the second communication module includes a diode, a first resistor, and a second resistor; the first resistor and the second resistor are connected in parallel to form a first parallel circuit; the diode is used to transmit a reference negative voltage signal in a first control pilot signal transmitted from a first end of the second communication module to the first parallel circuit; the first parallel circuit is used to convert the reference negative voltage signal into a first negative voltage signal and transmit the signal to a second end of the second communication module; the method includes: receiving a second negative voltage signal sent by a second communication module of the powered device; determining second communication data sent by the powered device based on the second negative voltage signal; Wherein, when the second negative voltage signal is a third voltage value, determining that the second communication data is third information; When the second negative voltage signal is a fourth voltage value, determining that the second communication data is fourth information; determining a first control pilot signal based on first communication data to be sent to the powered device; wherein, when the first communication data is first information, a voltage value of the first control pilot signal is a fifth voltage value; and when the first communication data is second information, a voltage value of the first control pilot signal is a sixth voltage value; The first control pilot signal is sent to the powered device, so that the powered device determines the first communication data sent by the power supply device based on the first control pilot signal.

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