Interface circuit, electric equipment, detection method, system, medium and program product

Abstract

The invention relates to an interface circuit, electric equipment, a detection method, a detection system, a medium and a program product. The charging equipment interface circuit comprises a charging interface and a voltage division circuit which are connected with each other, and the voltage division circuit is connected with a power supply; the voltage division circuit is used for dividing the output voltage of the power supply and outputting a detection signal; the voltage division circuit outputs different detection signals under the condition that the charging interface is connected with charging equipment or not connected with the charging equipment. According to the invention, whether the charging equipment is connected with the electric equipment can be detected.

Description

Interface circuit, electrical equipment, detection method, system, medium and program product Technical Field

[0001] The present application relates to the field of charging technology, and in particular to an interface circuit, an electrical device, a detection method, a system, a medium, and a program product. Background Art

[0002] With the development of new energy technologies, electric vehicles are becoming more and more popular. Among them, the charging method of electric vehicles has become one of the main research directions.

[0003] Currently, electric vehicles are charged by connecting to a charging gun installed on a charging station. During the charging process, the EVCC (Electric Vehicle Communication Controller) typically detects whether the charging gun is connected to the vehicle based on a duty cycle signal output by the charging station. However, if the duty cycle signal is abnormal or absent, the EVCC cannot detect whether the charging gun is connected to the vehicle, which may cause the charging gun to be dragged when the vehicle starts driving.

[0004] Summary of the Invention

[0005] Based on the above problems, the present application provides an interface circuit, electrical device, detection method, system, medium and program product, which can detect whether the charging device is connected to the electrical device even if the duty cycle signal is abnormal or disappears.

[0006] In a first aspect, the present application provides a charging device interface circuit, which includes a charging interface and a voltage divider circuit connected to each other, the voltage divider circuit is connected to a power supply; the voltage divider circuit is used to divide the output voltage of the power supply and output a detection signal; the voltage divider circuit outputs different detection signals when the charging interface is connected to a charging device and when it is not connected to a charging device.

[0007] In the technical solution of the embodiment of the present application, the connection of the charging device is detected by the charging device interface circuit, which is not affected by the duty cycle signal output by the charging pile. Even if the duty cycle signal is abnormal or disappears, it can still detect whether the charging device is connected to the power-consuming device. This can avoid the problem of the power-consuming device dragging the charging device when starting and driving.

[0008] In some embodiments, the voltage divider circuit includes a first voltage divider circuit and a second voltage divider circuit, the first voltage divider circuit and the second voltage divider circuit being connected in series, a common terminal of the first voltage divider circuit and the second voltage divider circuit being electrically connected to the charging interface, and the second voltage divider circuit being further connected to the power supply; the first voltage divider circuit is configured to output a detection signal. In the technical solution of the embodiments of the present application, since the detection signal is implemented based on the circuit structure and is not affected by the duty cycle signal output by the charging pile, even if the duty cycle signal is abnormal or disappears, it is still possible to detect whether the charging device is connected to the power device.

[0009] In some embodiments, the first voltage divider circuit includes a first resistor, a second resistor, and a third resistor; the first end of the first resistor is connected to the second voltage divider circuit, and the second end of the first resistor is grounded; the first end of the second resistor is connected to the first end of the first resistor, and the second end of the second resistor is connected to the first end of the third resistor; and the second end of the third resistor is grounded. In the technical solution of the embodiment of the present application, two different equivalent resistances are formed when the charging device is connected and when the charging device is not connected, thereby affecting the voltage division of the first voltage divider circuit and the second voltage divider circuit. Since the detection signal is output through a hardware connection, the detection signal is not affected by the duty cycle signal, and thus can accurately detect whether the charging device is connected to the power-consuming device.

[0010] In some embodiments, the first voltage divider circuit further includes a fourth resistor and a capacitor; the first end of the fourth resistor is connected to the second end of the second resistor, the second end of the fourth resistor is connected to the first end of the capacitor, and the second end of the capacitor is grounded. In the technical solution of the embodiments of the present application, the fourth resistor is used to limit the detection signal, and the capacitor is used to filter out interference signals in the detection signal, making the detection signal more convenient for subsequent identification.

[0011] In some embodiments, the second voltage divider circuit includes a fifth resistor; a first end of the fifth resistor is connected to the power supply, and a second end of the fifth resistor is connected to the first voltage divider circuit. In the technical solution of the embodiments of the present application, since the voltage divider circuit outputs the detection signal through a hardware connection, the detection signal is not affected by the duty cycle signal, and thus can accurately detect whether the charging device is connected to the power device.

[0012] In a second aspect, the present application provides an electrical device, which includes the charging device interface circuit as described in the first aspect.

[0013] In the technical solution of the embodiment of the present application, since the charging device interface circuit detects whether the electric device is connected to the charging device through hardware connection, it is not affected by the duty cycle signal output by the charging pile. Even if the duty cycle signal is abnormal or disappears, it can still detect whether the charging device is connected to the electric device, thereby avoiding the problem of dragging the charging device when the electric device starts driving.

[0014] In a third aspect, the present application provides a charging detection method, which is applied to a charging device interface circuit. The charging device interface circuit includes a charging interface and a voltage divider circuit connected to each other. The method includes: obtaining a detection signal from the voltage divider circuit; when the parameter value of the detection signal falls within a preset parameter value range, determining that the charging interface is connected to the charging device.

[0015] In the technical solution of the embodiment of the present application, the charging device interface circuit outputs a detection signal through hardware connection, and determines whether the power-consuming device is connected to the charging device based on the detection signal, and can accurately detect whether the charging device is connected to the power-consuming device.

[0016] In some embodiments, the method further includes: if the parameter value does not fall within a preset parameter value range, determining that the charging interface is not connected to a charging device. In the technical solution of the embodiment of the present application, the charging device interface circuit outputs a detection signal through a hardware connection, and determines whether the power-consuming device is connected to the charging device based on the detection signal, thereby accurately detecting whether the charging device is connected to the power-consuming device.

[0017] In some embodiments, the method further includes: upon determining that the charging port is connected to a charging device, sending first connection information to a device controller of the powered device; the first connection information is used to instruct the device controller to prohibit the powered device from driving. In the technical solution of the embodiments of the present application, prohibiting the powered device from driving by the device controller can avoid the problem of the user forgetting to disconnect the powered device from the charging device after charging is completed and starting the powered device, thereby dragging the charging device.

[0018] In some embodiments, the method further includes: upon determining that the charging port is connected to a charging device, sending second connection information to a display of the powered device; the second connection information is used to instruct the display to indicate that the powered device is connected to the charging device. In the technical solution of the embodiments of the present application, the display can prompt the driver to connect the powered device to the charging device, thereby preventing the user from forgetting to disconnect the powered device from the charging device and starting the powered device, thereby causing the charging device to be dragged along.

[0019] In some embodiments, the method further includes: determining the resistance of the charging device based on the detection signal; determining a target current corresponding to the resistance of the charging device based on a preset relationship between resistance and current; and sending a charging request to an AC charger of the power-consuming device, wherein the charging request includes the target current, instructing the AC charger to charge the battery of the power-consuming device according to the target current. In the technical solution of the embodiments of the present application, determining the target current corresponding to the resistance of the charging device enables the AC charger to perform current conversion based on the target current, thereby charging the battery of the power-consuming device with an appropriate DC current, thereby ensuring safe charging of the power-consuming device.

[0020] In some embodiments, the method further includes: obtaining a wake-up signal; the wake-up signal includes a wake-up signal sent by the communication controller of the electric device after detecting a duty cycle signal output by the charging station, and a wake-up signal output by the electric device after the battery is fully charged; performing a wake-up operation according to the wake-up signal, and obtaining a detection signal output by the charging device interface circuit. In the technical solution of the embodiment of the present application, waking up the battery management system through the wake-up signal can ensure that the battery management system can promptly and accurately detect whether the electric device is connected to the charging device, thereby avoiding the problem of the electric device starting to drive and dragging the charging device.

[0021] In a fourth aspect, the present application provides a charging detection system, which includes a battery management system and a charging device interface circuit as in the first aspect; the charging device interface circuit is used to output a detection signal; and the battery management system is used to obtain the detection signal and determine whether the electrical device is connected to the charging device based on the parameter value of the detection signal and the preset parameter value range.

[0022] In the technical solution of the embodiment of the present application, since the charging device interface circuit outputs the detection signal through hardware connection, the battery management system can detect whether the charging device is connected to the power-consuming device without being affected by the duty cycle signal output by the charging pile, thereby avoiding the problem of dragging the charging device when the power-consuming device starts driving.

[0023] In some embodiments, the charging detection system further includes a device controller; a battery management system, upon determining that the electric device is connected to the charging device, sends first connection information to the device controller; and the device controller is configured to prohibit the electric device from driving based on the first connection information. In the technical solution of the embodiments of the present application, even if a user forgets to connect the electric device to the charging device and starts driving, the electric device will remain in place because the device controller prohibits driving, thereby avoiding the problem of dragging the charging device.

[0024] In some embodiments, the charging detection system further includes a display; the battery management system is further configured to send second connection information to the display upon determining that the electric device is connected to the charging device; and the display is configured to display the connection between the electric device and the charging pile based on the second connection information. The technical solution of the embodiments of the present application can remind the user that the electric device is connected to the charging pile, thereby preventing the user from forgetting to connect the electric device to the charging pile and starting to drive, thereby dragging the charging pile with them.

[0025] In some embodiments, the charging detection system further includes an AC charger; a battery management system is further configured to determine the resistance of the charging device based on the detection signal, determine a target current corresponding to the resistance of the charging device based on a preset relationship between resistance and current and the resistance of the charging device, and send a charging request to the AC charger; the charging request includes the target current; and the AC charger is configured to charge the battery of the power-consuming device according to the target current. In the technical solution of the embodiments of the present application, the AC charger can perform current conversion, thereby charging the battery of the power-consuming device with an appropriate current, ensuring safe charging of the power-consuming device.

[0026] In some embodiments, the charging detection system further includes a communication controller configured to send a wake-up signal to a battery management system upon detecting a duty cycle signal output by the charging station; the battery management system configured to receive the wake-up signal, perform a wake-up operation based on the wake-up signal, and receive a detection signal output by the charging device interface circuit. In the technical solution of the embodiments of the present application, waking up the battery management system allows the battery management system to promptly and accurately detect whether the power-consuming device is connected to the charging device, thereby avoiding the problem of the power-consuming device dragging the charging device when starting to drive.

[0027] In a fifth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the method described in the third aspect are implemented.

[0028] In a sixth aspect, the present application provides a computer program product, comprising a computer program, characterized in that when the computer program is executed by a processor, the steps of the method described in the third aspect are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the optional embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0030] FIG1 is a schematic diagram of a charging device interface circuit according to an embodiment of the present application;

[0031] FIG2 is a second structural diagram of a charging device interface circuit according to an embodiment of the present application;

[0032] FIG3 is a third structural diagram of a charging device interface circuit according to an embodiment of the present application;

[0033] FIG4 is a fourth structural diagram of a charging device interface circuit according to an embodiment of the present application;

[0034] FIG5 is a fifth structural diagram of a charging device interface circuit according to an embodiment of the present application;

[0035] FIG6 is a flow chart of a charging detection method according to an embodiment of the present application;

[0036] FIG7 is a second flow chart of a charging detection method according to an embodiment of the present application;

[0037] FIG8 is a third flow chart of a charging detection method according to an embodiment of the present application;

[0038] FIG9 is a schematic diagram of a charging detection system according to an embodiment of the present application;

[0039] FIG10 is a second structural diagram of a charging detection system according to an embodiment of the present application;

[0040] FIG11 is a third structural diagram of a charging detection system according to an embodiment of the present application;

[0041] FIG12 is a fourth structural diagram of a charging detection system according to an embodiment of the present application;

[0042] FIG13 is a fifth structural diagram of a charging detection system according to an embodiment of the present application.

[0043] Description of reference numerals:

[0044] Charging device interface circuit 10, charging interface 11, voltage divider circuit 12, first voltage divider circuit 121;

[0045] A second voltage divider circuit 122, a first resistor R1, a second resistor R2, and a third resistor R3;

[0046] a fourth resistor R4, a capacitor C, and a fifth resistor R5;

[0047] Battery management system 20, device controller 30, display 40, AC charger 50;

[0048] Communication controller 60. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0050] 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 belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0052] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0054] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0055] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0056] Currently, electric vehicles are charged by connecting to a charging gun installed on a charging pile. During the charging process, the EVCC in the electric vehicle typically detects whether the charging gun is connected to the vehicle based on the duty cycle signal output by the charging pile. If the EVCC detects the duty cycle signal, it determines that the charging gun is connected to the vehicle; if the EVCC does not detect the duty cycle signal, it determines that the charging gun is not connected to the vehicle. However, if the duty cycle signal is abnormal or disappears, the EVCC cannot detect whether the charging gun is connected to the vehicle. If this happens, the charging gun may be dragged when the vehicle starts driving.

[0057] According to some embodiments of the present application, with reference to FIG1 , a charging device interface circuit 10 is provided. The charging device interface circuit 10 includes a charging interface 11 and a voltage divider circuit 12 connected to each other; the voltage divider circuit 12 is connected to a power supply Vt; the voltage divider circuit 12 is used to divide the output voltage of the power supply Vt and output a detection signal; the detection signal output by the voltage divider circuit 12 is different when the charging interface 11 is connected to a charging device and when it is not connected to a charging device.

[0058] In the embodiment of the present application, the charging device interface circuit 10 includes a charging interface 11 and a voltage divider circuit 12. The voltage divider circuit 12 is connected to the charging interface 11 and the power supply Vt respectively. The voltage divider circuit 12 can divide the output voltage of the power supply Vt and output a detection signal.

[0059] When the charging interface 11 is connected to a charging device, the voltage divider circuit 12 performs voltage division processing according to the charging device and its own circuit structure, and outputs a first detection signal. When the charging interface 11 is not connected to a charging device, the voltage divider circuit 12 performs voltage division processing according to its own circuit structure, and outputs a second detection signal. It can be understood that since the voltage division of the voltage divider circuit 12 will change when the charging interface 11 is connected to a charging device or not, the detection signal output by the voltage divider circuit 12 is different. In addition, when the type of charging device connected to the charging device interface circuit 10 is different, the voltage division of the voltage divider circuit 12 will change, so the detection signal output by the voltage divider circuit 12 is also different. The embodiment of the present application does not limit the type of charging device.

[0060] The above-mentioned charging device interface circuit includes a charging interface and a voltage divider circuit that are interconnected. The voltage divider circuit is connected to a power supply; the voltage divider circuit divides the output voltage of the power supply and outputs a detection signal; the detection signal output by the voltage divider circuit is different when the charging interface is connected to a charging device and when it is not connected to a charging device. In the embodiment of the present application, since the structure of the charging device interface circuit is fixed, and whether the charging device is connected will change the voltage division of the voltage divider circuit, the detection of whether the charging device is connected is detected by the charging device interface circuit, which is not affected by the duty cycle signal output by the charging pile. Even if the duty cycle signal is abnormal or disappears, it is still possible to detect whether the charging device is connected to the power-consuming device. In this way, the problem of the power-consuming device dragging the charging device when starting to drive can be avoided.

[0061] According to some embodiments of the present application, referring to Figure 2, the voltage divider circuit 12 includes a first voltage divider circuit 121 and a second voltage divider circuit 122. The first voltage divider circuit 121 and the second voltage divider circuit 122 are connected in series, and the common end of the first voltage divider circuit 121 and the second voltage divider circuit 122 is electrically connected to the charging interface 11, and the second voltage divider circuit 122 is also connected to the power supply Vt; the first voltage divider circuit 121 is used to output a detection signal.

[0062] In the embodiment of the present application, the voltage divider circuit 12 includes a first voltage divider circuit 121 and a second voltage divider circuit 122, and the second voltage divider circuit 122 is further connected to the power supply Vt. Since the first voltage divider circuit 121 and the second voltage divider circuit 122 are connected in series, the first voltage divider circuit 121 and the second voltage divider circuit 122 can divide the output voltage of the power supply Vt, and the first voltage divider circuit 121 outputs a detection signal based on the voltage division process.

[0063] The common end of the first voltage divider circuit 121 and the second voltage divider circuit 122 is connected to the charging interface 11. When the charging interface 11 is connected to a charging device, the first voltage divider circuit 121 and the second voltage divider circuit 122 divide the output voltage of the power supply Vt according to the charging device and the circuit structure of the first voltage divider circuit 121 and the second voltage divider circuit 122, and the first voltage divider circuit 121 outputs a first detection signal.

[0064] When the charging interface 11 is not connected to a charging device, the first voltage divider circuit 121 and the second voltage divider circuit 122 divide the output voltage of the power supply Vt according to the circuit structure of the first voltage divider circuit 121 and the second voltage divider circuit 122, and the first voltage divider circuit 121 outputs a second detection signal.

[0065] In the above embodiment, the voltage divider circuit includes a first voltage divider circuit and a second voltage divider circuit, the first voltage divider circuit and the second voltage divider circuit are connected in series, the common end of the first voltage divider circuit and the second voltage divider circuit is electrically connected to the charging interface, and the second voltage divider circuit is also connected to the power supply; the first voltage divider circuit outputs a detection signal. The embodiment of the present application divides the voltage by the first voltage divider circuit and the second voltage divider circuit. When the charging device is connected and when the charging device is not connected, the voltage division situation changes and different detection signals are output. Since the detection signal is implemented based on the circuit structure, it is not affected by the duty cycle signal output by the charging pile. Even if the duty cycle signal is abnormal or disappears, it can still detect whether the charging device is connected to the power device.

[0066] According to some embodiments of the present application, referring to Figure 3, the first voltage divider circuit 121 includes a first resistor R1, a second resistor R2 and a third resistor R3; the first end of the first resistor R1 is connected to the second voltage divider circuit 122, and the second end of the first resistor R1 is grounded; the first end of the second resistor R2 is connected to the first end of the first resistor R1, and the second end of the second resistor R2 is connected to the first end of the third resistor R3; the second end of the third resistor R3 is grounded.

[0067] In the embodiment of the present application, the first voltage divider circuit 121 includes a first resistor R1, a second resistor R2 and a third resistor R3; wherein, the first end of the first resistor R1 is connected to the second voltage divider circuit 122, and the second end of the first resistor R1 is grounded; the first end of the second resistor R2 is connected to the first end of the first resistor R1, that is, the first end of the second resistor R2 is also connected to the second voltage divider circuit 122, and the second end of the second resistor R2 is connected to the first end of the third resistor R3; the second end of the third resistor R3 is grounded.

[0068] As shown in Figure 3, the second resistor R2 and the third resistor R3 are connected in series to form a first equivalent resistor. When the charging interface 11 is connected to a charging device, the first equivalent resistor is connected in parallel with the first resistor R1 and the resistance of the charging device to form a second equivalent resistor; the second equivalent resistor is connected in series with the second voltage divider circuit 122 to divide the output voltage of the power supply Vt, and output a first detection signal from the common end of the second resistor R2 and the third resistor R3.

[0069] When the charging interface 11 is not connected to a charging device, the first equivalent resistor is connected in parallel with the first resistor R1 to form a third equivalent resistor; the third equivalent resistor is connected in series with the second voltage divider circuit 122 to divide the output voltage of the power supply Vt, and output a second detection signal from the common end of the second resistor R2 and the third resistor R3.

[0070] It can be understood that in both cases where the charging interface 11 is connected to a charging device and where it is not connected to a charging device, the first voltage divider circuit 121 forms a second equivalent resistance and a third equivalent resistance, respectively. Since the second equivalent resistance and the third equivalent resistance are of different sizes, the first voltage divider circuit 121 and the second voltage divider circuit 122 divide the output voltage of the power supply Vt to obtain different detection signals.

[0071] Optionally, the first resistor R1 may be 100KΩ, and the second resistor R2 and the third resistor R3 may be 47KΩ. The embodiment of the present application does not limit the sizes of the first resistor R1, the second resistor R2, and the third resistor R3.

[0072] In the above embodiment, the first voltage divider circuit includes a first resistor, a second resistor, and a third resistor; the first end of the first resistor is connected to the second voltage divider circuit, and the second end of the first resistor is grounded; the first end of the second resistor is connected to the first end of the first resistor, and the second end of the second resistor is connected to the first end of the third resistor; and the second end of the third resistor is grounded. In the embodiment of the present application, two different equivalent resistances are formed when the charging device is connected and when the charging device is not connected, thereby affecting the voltage division conditions of the first voltage divider circuit and the second voltage divider circuit. Since the detection signal is output through a hardware connection, the detection signal is not affected by the duty cycle signal and can therefore accurately detect whether the charging device is connected to the power-consuming device.

[0073] According to some embodiments of the present application, referring to Figure 4, the first voltage divider circuit 121 also includes a fourth resistor R4 and a capacitor C; the first end of the fourth resistor R4 is connected to the second end of the second resistor R2, the second end of the fourth resistor R4 is connected to the first end of the capacitor C, and the second end of the capacitor C is grounded.

[0074] In the embodiment of the present application, the first voltage divider circuit 121 further includes a fourth resistor R4 and a capacitor C, wherein the first end of the fourth resistor R4 is connected to the second end of the second resistor R2, the second end of the second resistor R2 is connected to the first end of the capacitor C; and the second end of the capacitor C is grounded.

[0075] As shown in Figure 4, the first end of the fourth resistor R4 is connected to the common end of the second resistor R2 and the third resistor R3, and the second end of the fourth resistor R4 outputs the detection signal. The capacitor C can act as a filter to remove interference signals in the detection signal.

[0076] Optionally, the fourth resistor R4 may be 33KΩ, and the capacitor C may be 473F. The embodiment of the present application does not limit the sizes of the fourth resistor and the capacitor, and they can be set according to actual conditions.

[0077] In the above embodiment, the first voltage divider circuit further includes a fourth resistor and a capacitor; the first end of the fourth resistor is connected to the second end of the second resistor, the second end of the fourth resistor is connected to the first end of the capacitor, and the second end of the capacitor is grounded. In this embodiment, the fourth resistor is used to limit the detection signal, and the capacitor is used to filter out interference signals in the detection signal, making the detection signal more convenient for subsequent identification.

[0078] According to some embodiments of the present application, referring to FIG. 5 , the second voltage divider circuit 122 includes a fifth resistor R5 ; a first end of the fifth resistor R5 is connected to the power supply Vt, and a second end of the fifth resistor R5 is connected to the first voltage divider circuit 121 .

[0079] In the embodiment of the present application, the second voltage divider circuit 122 further includes a fifth resistor R5 , a first end of the fifth resistor R5 is connected to the power source Vt, and a second end of the fifth resistor R5 is connected to the first voltage divider circuit 121 .

[0080] As shown in Figure 5, the second end of the fifth resistor R5 is connected to the first end of the first resistor R1 and the first end of the second resistor R2. The equivalent resistor formed by the first voltage divider circuit 121 and the fifth resistor R5 divide the output voltage of the power supply Vt. When the charging interface 11 is connected to a charging device, the second equivalent resistor formed by the first voltage divider circuit 121 is connected in series with the fifth resistor R5 to divide the output voltage of the power supply Vt and output a first detection signal from the second end of the fourth resistor R4. When the charging interface 11 is not connected to a charging device, the third equivalent resistor formed by the first voltage divider circuit 121 is connected in series with the fifth resistor R5 to divide the output voltage of the power supply Vt and output a second detection signal from the second end of the fourth resistor R4.

[0081] Optionally, the fifth resistor R5 may be 1KΩ. The embodiment of the present application does not limit the size of the fifth resistor, and the value may be selected according to actual conditions.

[0082] In some embodiments of the present application, the fifth resistor R5 may be obtained by connecting multiple resistors in parallel, that is, the second voltage divider circuit 122 is not limited to the description in the above embodiments and may be configured according to actual conditions.

[0083] In the above embodiment, the second voltage-divider circuit includes a fifth resistor; the first end of the fifth resistor is connected to the power supply, and the second end of the fifth resistor is connected to the first voltage-divider circuit. In the embodiment of the present application, the output voltage of the power supply is divided by the equivalent resistance formed by the fifth resistor and the first voltage-divider circuit, thereby causing the first voltage-divider circuit to output a detection signal. Because the voltage-divider circuit outputs the detection signal through a hardware connection, the detection signal is not affected by the duty cycle signal and can therefore accurately detect whether the charging device is connected to the power-consuming device.

[0084] According to some embodiments of the present application, an electric device is provided, which includes a charging device interface circuit as described in the above embodiments.

[0085] In the embodiment of the present application, the charging device interface circuit described in the above embodiment can be set on the power-consuming device, and the embodiment of the present application will not be further described in detail.

[0086] In the two cases where the charging device interface circuit is connected to the charging device and is not connected to the charging device, the charging device interface circuit can output different detection signals. The power-consuming device can determine whether to connect to the charging device based on the detection signal and take corresponding measures.

[0087] In the above embodiment, the electric device includes a charging device interface circuit. Since the charging device interface circuit detects whether the electric device is connected to the charging device through hardware connection, it is not affected by the duty cycle signal output by the charging pile. Even if the duty cycle signal is abnormal or disappears, it can still detect whether the charging device is connected to the electric device, thereby avoiding the problem of dragging the charging device when the electric device starts to drive.

[0088] According to some embodiments of the present application, with reference to FIG6 , a charging detection method is provided. The method can be applied to any charging device interface circuit provided in the embodiments of the present application. The charging device interface circuit includes a charging interface and a voltage divider circuit connected to each other. The method can include the following steps:

[0089] Step 201: Acquire a detection signal from a voltage divider circuit.

[0090] The charging device interface circuit is described in the above embodiment, and will not be described in detail in this embodiment. The charging device interface circuit outputs a detection signal, and the power-consuming device can obtain the detection signal.

[0091] In some embodiments of the present application, after the charging device interface circuit outputs the detection signal, the detection signal may be processed, such as analog-to-digital conversion processing, filtering processing, etc., and the power-consuming device obtains the processed detection signal.

[0092] Step 202 : When the parameter value of the detection signal falls within a preset parameter value range, it is determined that the charging interface is connected to a charging device.

[0093] A preset parameter value range is stored in the electrical device. After obtaining the detection signal, the parameter value of the detection signal is compared with the preset parameter value range. When the parameter value falls within the preset parameter value range, it is determined that the charging interface is connected to the charging device; when the parameter value does not fall within the preset parameter value range, it is determined that the charging interface is not connected to the charging device.

[0094] For example, the parameter value of the detection signal is aV, and the preset parameter value range is [0, b]. If a is within [0, b], it is determined that the electric device is connected to the charging device; if a is outside [0, b], it is determined that the electric device is not connected to the charging device.

[0095] In some embodiments of the present application, since charging devices may have multiple models, multiple preset parameter value ranges may be set. If the parameter value of the detection signal is within any of the preset parameter value ranges, it is determined that the power device is connected to the charging device; if the parameter value of the detection signal is outside all preset parameter value ranges, it is determined that the power device is not connected to the charging device. The embodiments of the present application do not limit the preset parameter value ranges and can be set according to actual circumstances.

[0096] It should be noted that the parameter value of the above-mentioned detection signal can be a voltage value or a current value, and the embodiments of the present application do not limit this.

[0097] In some embodiments of the present application, a battery management system (BMS) is provided in the power-consuming device. The BMS can obtain a detection signal and determine whether the power-consuming device is connected to the charging device based on the detection signal. In actual applications, other modules in the power-consuming device can also be used to determine whether the power-consuming device is connected to the charging device, and the embodiments of the present application are not limited to this.

[0098] In some embodiments of the present application, during the charging process, the BMS obtains the socket temperature of the charging socket and, based on the socket temperature, determines whether to allow the charger to charge the device. It is understood that monitoring the temperature of the charging socket by the BMS can prevent damage to the charging socket due to overheating, thereby preventing damage to the internal components of the device, reducing maintenance costs, extending service life, and ensuring the safety of the device and the user.

[0099] In some embodiments of the present application, during the charging process, the BMS obtains the electronic lock status of the charging socket and determines whether the charging device is detached based on the electronic lock status to avoid the risk of electric shock to personnel.

[0100] In the above embodiment, a detection signal is obtained from the voltage divider circuit of the charging device interface circuit; if the parameter value of the detection signal falls within a preset parameter value range, the charging interface circuit is determined to be connected to the charging device; if the parameter value does not fall within the preset parameter value range, the charging interface is determined to be unconnected to the charging device. The charging device interface circuit in the embodiment of the present application outputs a detection signal via a hardware connection. Determining whether the power-consuming device is connected to the charging device based on this detection signal is not affected by the duty cycle signal output by the charging pile. Therefore, even if the duty cycle signal is abnormal or disappears, it is still possible to accurately detect whether the charging device is connected to the power-consuming device.

[0101] According to some embodiments of the present application, it may also include: when it is determined that the charging interface is connected to the charging device, sending first connection information to the device controller of the electric device; the first connection information is used to instruct the controller to prohibit the electric device from driving.

[0102] An equipment controller is provided in the electrical equipment. For example, when the electrical equipment is a vehicle, the equipment controller may be a vehicle control unit (VCU). The VCU determines the driver's driving intention by collecting signals such as the accelerator pedal, gear position, and brake pedal. The VCU monitors vehicle status information (vehicle speed, temperature, etc.), and after judgment and processing, sends operating status control instructions to the vehicle's power system and power battery system, and controls the working mode of the vehicle's accessory power system. The VCU has system fault diagnosis, protection, and storage functions.

[0103] If the electric device is connected to the charging device, the BMS can generate first connection information indicating the connection between the electric device and the charging device and send the first connection information to the device controller. The device controller receives the first connection information and, based on the first connection information, prohibits the electric device from traveling. Optionally, the device controller is a VCU, which limits the motor torque to prohibit the vehicle from traveling.

[0104] In some embodiments of the present application, during the charging process, the BMS obtains the charging permission information sent by the device controller; if the charging permission information is not obtained, or the charging prohibition information is obtained, the charging path is cut off, and / or the charging pile is notified to stop charging.

[0105] In the above embodiment, if the electric device is determined to be connected to the charging device, first connection information is sent to the device controller of the electric device, instructing the device controller to prohibit the electric device from driving. This embodiment of the application prohibits the electric device from driving by the device controller, thereby preventing the user from forgetting to disconnect the electric device from the charging device after charging is completed and starting the electric device, thereby causing the charging device to be dragged along.

[0106] According to some embodiments of the present application, it may also include: when it is determined that the charging interface is connected to the charging device, sending second connection information to the display in the power-consuming device; the second connection information is used to instruct the display to show that the power-consuming device is connected to the charging device.

[0107] A display is provided in the electrical device. For example, if the electrical device is a vehicle, the display may be a dashboard, a liquid crystal touch screen, etc. in the vehicle. The embodiment of the present application does not limit the display.

[0108] When the electric device is connected to the charging device, the BMS may generate second connection information indicating that the electric device is connected to the charging device and send the second connection information to the display. The display receives the second connection information and displays that the electric device is connected to the charging device according to the second connection information.

[0109] For example, an indicator light is provided on the instrument panel, and the indicator light is illuminated after the instrument panel receives the second connection information sent by the BMS. Alternatively, the LCD touch screen displays the words "vehicle connected to charging device" or an icon on the screen after receiving the second connection information sent by the BMS.

[0110] In the above embodiment, if the electric device is determined to be connected to the charging device, second connection information is sent to the display of the electric device, instructing the display to indicate that the electric device and the charging device are connected. In this embodiment of the application, the display can prompt the driver to connect the electric device to the charging device, thereby preventing the user from forgetting to disconnect the electric device from the charging device and starting the electric device, thereby causing the charging device to be dragged.

[0111] According to some embodiments of the present application, as shown in FIG7 , the following steps may also be included:

[0112] Step 301: Determine the resistance of the charging device according to the detection signal.

[0113] After the detection signal is obtained, the resistance of the charging device can be determined according to the parameter value of the detection signal.

[0114] Taking the detection signal as a voltage signal as an example, as shown in Figure 5, the second voltage at the common end of the second resistor and the third resistor can be determined based on the first voltage corresponding to the detection signal and the fourth resistor; the third voltage at the connection point of the first resistor and the second resistor can be determined based on the second voltage, the second resistor and the third resistor; the equivalent resistance of the first voltage divider circuit can be determined based on the fifth resistor, the third voltage and the output voltage of the power supply, and the resistance of the charging device can be determined based on the equivalent resistance, the first resistor, the second resistor and the third resistor.

[0115] Step 302 : Determine a target current corresponding to the resistance of the charging device according to a preset correspondence between resistance and current.

[0116] The electrical device has a pre-set correspondence between resistance and current. After determining the resistance of the charging device, the target current corresponding to the resistance of the charging device can be determined based on this correspondence. Table 1 shows the correspondence between resistance and current for European standard charging devices.

[0117] Table 1

[0118] Maximum charging current for resistor AC charging Connection type 1500Ω Unlimited Configuration FF 680Ω 20A Configuration DD 220Ω 32A Configuration DD 100Ω 63A Configuration DD

[0119] It should be noted that the correspondence between resistance and current is not limited to European standard charging equipment, but may also include American standard charging equipment or other charging equipment, and the embodiments of the present application do not limit this.

[0120] Step 303: Send a charging request to the AC charger of the electric device.

[0121] The charging request includes a target current, which is used to instruct the AC charger to charge the battery of the electrical device according to the target current.

[0122] An AC charger (Onboard charger, OBC) is provided in the electrical equipment, and the OBC can convert AC current into DC current.

[0123] After determining the target current corresponding to the resistance of the charging device, the BMS sends a charging request to the AC charger, including the target current. The OBC converts the AC current output by the charging pile according to the target current to obtain DC current, which is used to charge the battery of the power device.

[0124] In some embodiments of the present application, during the charging process, the BMS obtains OBC parameters and determines whether charging can continue based on the OBC parameters. If the OBC parameters determine that charging cannot continue, the BMS disconnects the charging path and / or notifies the charging station to stop charging. The embodiments of the present application do not limit the OBC parameters and the determination method, and they can be set according to actual circumstances.

[0125] In the above embodiment, the resistance of the charging device is determined based on a detection signal; a target current corresponding to the resistance of the charging device is determined based on a preset relationship between resistance and current; and a charging request including the target current is sent to the AC charger of the power-consuming device, instructing the AC charger to charge the battery of the power-consuming device according to the target current. In the present embodiment, determining the target current corresponding to the resistance of the charging device enables the AC charger to perform current conversion based on the target current, thereby charging the battery of the power-consuming device with an appropriate DC current, ensuring safe charging of the power-consuming device.

[0126] According to some embodiments of the present application, as shown in FIG8 , the following steps may also be included:

[0127] Step 401: Acquire a wake-up signal.

[0128] The wake-up signal includes a wake-up signal sent by the communication controller of the electric device after detecting the duty cycle signal output by the charging pile, and a wake-up signal output by the electric device after the battery is fully charged.

[0129] A communication controller (EVCC) can be installed in the electrical device. After the electrical device is connected to the charging station, if the EVC detects the duty cycle signal (CP) output by the charging station, it outputs a wake-up signal, which is then received by the BMS. The wake-up signal output by the EVCC can be a 24V / 100mA rising-edge wake-up signal.

[0130] After the battery is fully charged, the power-consuming device may also output a wake-up signal, which may be to wake up the KL15.

[0131] In practical applications, the wake-up signal is not limited to the description in the above embodiment, and may also include other wake-up signals.

[0132] Step 402 : performing a wake-up operation according to the wake-up signal, and obtaining a detection signal output by the charging device interface circuit.

[0133] After receiving the wake-up signal, the BMS performs a wake-up operation and executes the above-mentioned step of obtaining the detection signal output by the charging device interface circuit. Thereafter, the BMS determines whether the electric device is connected to the charging device based on the obtained detection signal.

[0134] In some embodiments of the present application, when the BMS detects that the battery is fully charged, the charging pile has manually terminated charging, or the charging pile has abnormally terminated charging, it sends third connection information connecting the power-consuming device to the charging device and a stop charging request to the EVCC. After receiving the third connection information and the stop charging request, the EVCC sends a stop charging instruction to the charging pile and sleeps for a preset duration. The preset duration can be 7 seconds, but this embodiment of the present application does not limit the preset duration.

[0135] Understandably, when the battery is fully charged, the charging pile terminates charging manually, or the charging pile terminates charging abnormally, the EVCC notifies the charging pile to end charging, which can protect the electrical equipment; and the EVCC hibernation can save power consumption.

[0136] In the above embodiment, a wake-up signal is obtained; a wake-up operation is performed according to the wake-up signal; and a detection signal output by the charging device interface circuit is obtained. In the present embodiment, waking up the battery management system (BMS) by using the wake-up signal ensures that the BMS can promptly and accurately detect whether the power-consuming device is connected to the charging device, thereby avoiding the problem of the power-consuming device dragging the charging device when it starts driving.

[0137] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0138] Based on the same inventive concept, the present application also provides a charging detection device for implementing the aforementioned charging detection method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more charging detection device embodiments provided below can be found in the above-mentioned limitations of the charging detection method and will not be repeated here.

[0139] According to some embodiments of the present application, as shown in Figure 9, a charging detection system is provided, which includes a battery management system 20 and the charging device interface circuit 10 in the above embodiment; the charging device interface circuit 10 is used to output a detection signal; the battery management system 20 is used to obtain the detection signal and determine whether the electrical device is connected to the charging device based on the parameter value of the detection signal and a preset parameter value range.

[0140] In the embodiment of the present application, the charging detection system includes a battery management system 20 and a charging device interface circuit 10. The charging device interface circuit 10 can output different detection signals when a charging device is connected and when a charging device is not connected.

[0141] The battery management system 20, or BMS, can obtain a detection signal output by the charging device interface circuit 10 and then compare a parameter value of the detection signal with a preset parameter value range. If the parameter value of the detection signal falls within the preset parameter value range, the battery management system 20 determines that the power device is connected to the charging device. If the parameter value of the detection signal does not fall within the preset parameter value range, the battery management system 20 determines that the power device is not connected to the charging device. The embodiments of the present application do not limit the preset parameter value range.

[0142] In the above-described embodiment, the charging detection system includes a battery management system and a charging device interface circuit; the charging device interface circuit outputs a detection signal; the battery management system receives the detection signal and, based on the parameter value of the detection signal and a preset parameter value range, determines whether the power-consuming device is connected to the charging device. In the embodiment of the present application, because the charging device interface circuit outputs the detection signal via a hardware connection, the battery management system can detect whether the charging device is connected to the power-consuming device without being affected by the duty cycle signal output by the charging pile, thereby avoiding the problem of the power-consuming device dragging the charging device when the power-consuming device starts driving.

[0143] According to some embodiments of the present application, as shown in Figure 10, the charging detection system also includes a device controller 30; the battery management system 20 sends first connection information to the device controller 30 when it is determined that the electric device is connected to the charging device; the controller 30 is used to prohibit the electric device from driving according to the first connection information.

[0144] In this embodiment of the present application, the charging detection system further includes a device controller 30, such as a vehicle controller (VCU). Upon determining that the powered device is connected to the charging device, the battery management system 20 sends first connection information to the device controller 30. The device controller receives the first connection information and, based on the first connection information, prohibits the powered device from driving, such as by limiting the motor torque, via the VCU.

[0145] In the above embodiment, upon determining that the powered device is connected to the charging device, the battery management system sends first connection information to the device controller. Based on this first connection information, the controller prohibits the powered device from driving. This way, even if the user forgets to connect the powered device to the charging device and starts driving, the controller prohibits the powered device from driving, causing it to remain in place. This prevents the charging device from being dragged along.

[0146] According to some embodiments of the present application, as shown in Figure 11, the charging detection system also includes a display 40; the battery management system 20 is further used to send second connection information to the display 40 when it is determined that the electric device is connected to the charging device; the display 40 is used to display the connection between the electric device and the charging pile according to the second connection information.

[0147] In the embodiment of the present application, the charging detection system further includes a display 40, such as an instrument panel, a liquid crystal touch screen, etc. The embodiment of the present application does not limit the display.

[0148] When the battery management system 20 determines that the electric device is connected to the charging device, it sends second connection information to the display 40. The display 40 receives the second connection information and displays that the electric device is connected to the charging pile according to the second connection information.

[0149] For example, the instrument panel is provided with an indicator light. After receiving the second connection information, the indicator light on the instrument panel illuminates, indicating that the electric device is connected to the charging pile. Alternatively, after receiving the second connection information, the LCD touch screen displays the words "Connected to Charging Pile" or an icon on the screen. This embodiment of the application does not limit the display method.

[0150] In the above embodiment, the charging detection system further includes a display. Upon determining that the power device is connected to the charging device, the battery management system sends second connection information to the display. The display displays the connection between the power device and the charging pile based on the second connection information. This reminds the user that the power device is connected to the charging pile, thereby preventing the user from forgetting to connect the power device to the charging pile and starting the vehicle to drive, thereby dragging the charging pile with them.

[0151] According to some embodiments of the present application, as shown in Figure 12, the charging detection system also includes an AC charger 50; the battery management system 20 is further used to determine the resistance of the charging device based on the detection signal, and determine the target current corresponding to the resistance of the charging device based on the preset correspondence between the resistance and current and the resistance of the charging device, and send a charging request to the AC charger 50; the charging request includes the target current; the AC charger 50 is used to charge the battery of the electrical device according to the target current.

[0152] In this embodiment of the present application, the charging detection system may further include an AC charger 50, or OBC. After acquiring the detection signal, the battery management system 20 determines the resistance of the charging device based on the detection signal. The determination process can be referred to in the description of the above embodiment and will not be further described in this embodiment of the present application.

[0153] After determining the resistance of the charging device, the BMS determines the target current corresponding to the resistance of the charging device based on the preset correspondence between resistance and current, and then sends a charging request to the OBC.

[0154] The OBC receives a charging request, converts the AC current output by the charging pile into DC current according to the target current in the charging request, and then uses the DC current to charge the battery of the power-consuming device.

[0155] In FIG12 , the solid line is the communication connection line, and the dotted line is the power transmission line.

[0156] In some embodiments of the present application, when the charging pile outputs a direct current, the direct current output by the charging pile can be directly used to charge the battery of the electrical device.

[0157] In the above embodiment, the charging detection system also includes an AC charger; a battery management system determines the resistance of the charging device based on the detection signal, determines a target current corresponding to the resistance of the charging device based on a preset relationship between resistance and current and the resistance of the charging device, and sends a charging request including the target current to the AC charger; the AC charger charges the battery of the power-consuming device according to the target current. In this embodiment of the present application, the AC charger can perform current conversion, thereby charging the battery of the power-consuming device with an appropriate current, ensuring safe charging of the power-consuming device.

[0158] According to some embodiments of the present application, as shown in Figure 13, the charging detection system also includes a communication controller 60; the communication controller 60 is used to send a wake-up signal to the battery management system 20 after detecting the duty cycle signal output by the charging pile; the battery management system 20 is used to obtain the wake-up signal, perform a wake-up operation according to the wake-up signal, and obtain the detection signal output by the charging device interface circuit 10.

[0159] In this embodiment of the present application, the charging detection system may further include a communication controller 60, such as an EVCC. When the power-consuming device is connected to the charging device, the charging station outputs a duty cycle signal CP. Upon detecting the duty cycle signal CP, the EVCC outputs a wake-up signal. This wake-up signal may be a 24V / 100mA rising-edge wake-up signal.

[0160] The BMS receives the wake-up signal, performs a wake-up operation, and obtains a detection signal output by the charging device interface circuit 10. Based on the detection signal, it determines whether the device is connected to the charging device. If the device is connected to the charging device, the BMS sends a first connection message to the VCU, instructing the VCU to prohibit the device from driving. It also sends a second connection message to the display 40, causing the display 40 to indicate that the device is connected to the charging device.

[0161] In FIG13 , the solid line is the communication connection line, and the dotted line is the power transmission line.

[0162] In the above embodiment, the charging detection system further includes a communication controller; upon detecting the duty cycle signal output by the charging station, the communication controller sends a wake-up signal to the battery management system; the battery management system receives the wake-up signal, performs a wake-up operation based on the wake-up signal, and obtains a detection signal output by the charging device interface circuit. This embodiment of the present application wakes up the battery management system, allowing it to promptly and accurately detect whether the power-consuming device is connected to the charging device, thereby avoiding the problem of the power-consuming device dragging the charging device when it starts driving.

[0163] According to some embodiments of the present application, a method is further provided that includes a storage medium, such as a memory including instructions, wherein the instructions can be executed by a processor of the power-consuming device to perform the above method. The storage medium can be a non-transitory computer-readable storage medium, such as a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, or the like.

[0164] According to some embodiments of the present application, a computer program product is also provided. When executed by a processor, the computer program can implement the above method. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, part or all of the above method can be implemented in whole or in part according to the processes or functions described in the embodiments of the present disclosure.

[0165] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0166] The embodiments described above only express several implementation methods of the present application, which are convenient for understanding the technical solutions of the present application in a specific and detailed manner, but they cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several variations and improvements can be made, which all fall within the scope of protection of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the scope of protection of the attached claims described in the present application. Therefore, the scope of protection of the patent of this application shall be based on the content of the attached claims, and the description and drawings can be used to interpret the content of the claims.

Claims

1. A charging device interface circuit, characterized in that: The charging device interface circuit includes a charging interface and a voltage divider circuit connected to each other, and the voltage divider circuit is connected to a power supply; The voltage divider circuit is used to divide the output voltage of the power supply and output a detection signal; the detection signal output by the voltage divider circuit is different when the charging interface is connected to a charging device and when it is not connected to the charging device.

2. The charging device interface circuit according to claim 1, characterized in that: The voltage divider circuit includes a first voltage divider circuit and a second voltage divider circuit, the first voltage divider circuit and the second voltage divider circuit are connected in series, a common end of the first voltage divider circuit and the second voltage divider circuit is electrically connected to the charging interface, and the second voltage divider circuit is also connected to the power supply; The first voltage divider circuit is used to output the detection signal.

3. The charging device interface circuit according to claim 2, characterized in that: The first voltage divider circuit includes a first resistor, a second resistor and a third resistor; A first end of the first resistor is connected to the second voltage divider circuit, and a second end of the first resistor is grounded; The first end of the second resistor is connected to the first end of the first resistor, and the second end of the second resistor is connected to the first end of the third resistor; A second end of the third resistor is grounded.

4. The charging device interface circuit according to claim 3, characterized in that: The first voltage divider circuit further includes a fourth resistor and a capacitor; The first end of the fourth resistor is connected to the second end of the second resistor, the second end of the fourth resistor is connected to the first end of the capacitor, and the second end of the capacitor is grounded.

5. The charging device interface circuit according to any one of claims 2 to 4, characterized in that: The second voltage-dividing circuit includes a fifth resistor; a first end of the fifth resistor is connected to the power supply, and a second end of the fifth resistor is connected to the first voltage-dividing circuit.

6. An electrical device, characterized in that: The electric device includes the charging device interface circuit according to any one of claims 1 to 5.

7. A charging detection method, characterized in that: Applied to a charging device interface circuit, the charging device interface circuit includes a charging interface and a voltage divider circuit connected to each other, and the method includes: Acquire a detection signal from the voltage divider circuit; When the parameter value of the detection signal falls within a preset parameter value range, it is determined that the charging interface is connected to a charging device.

8. The method according to claim 7, characterized in that The method further comprises: When the parameter value does not fall within the preset parameter value range, it is determined that the charging interface is not connected to the charging device.

9. The method according to claim 7, characterized in that The method further comprises: When it is determined that the charging interface is connected to the charging device, first connection information is sent to a device controller of the electric device; the first connection information is used to instruct the controller to prohibit the electric device from traveling.

10. The method according to claim 7, characterized in that The method further comprises: When it is determined that the charging interface is connected to the charging device, second connection information is sent to the display of the power-consuming device; the second connection information is used to instruct the display to display that the power-consuming device is connected to the charging device.

11. The method according to any one of claims 7 to 10, characterized in that: The method further comprises: determining the resistance of the charging device according to the detection signal; Determining a target current corresponding to the resistance of the charging device according to a preset correspondence between resistance and current; A charging request is sent to an AC charger of the electric device, where the charging request includes the target current, and is used to instruct the AC charger to charge the battery of the electric device according to the target current.

12. The method according to any one of claims 7 to 10, characterized in that: The method further comprises: Obtaining a wake-up signal; the wake-up signal includes a wake-up signal sent by the communication controller of the electric device after detecting the duty cycle signal output by the charging pile, and a wake-up signal output by the electric device after the battery is fully charged; A wake-up operation is performed according to the wake-up signal, and the detection signal output by the charging device interface circuit is acquired.

13. A charging detection system, characterized in that: The charging detection system includes a battery management system and a charging device interface circuit according to any one of claims 1 to 5; The charging device interface circuit is used to output a detection signal; The battery management system is used to obtain the detection signal and determine whether the power-consuming device is connected to the charging device based on the parameter value of the detection signal and the preset parameter value range.

14. The charging detection system according to claim 13, characterized in that: The charging detection system also includes a device controller; The battery management system sends first connection information to the device controller when determining that the power-consuming device is connected to the charging device; The device controller is configured to prohibit the electric device from traveling according to the first connection information.

15. The charging detection system according to claim 14, characterized in that: The charging detection system further includes a display; The battery management system is further configured to send second connection information to the display when it is determined that the power-consuming device is connected to the charging device; The display is used to display that the electric device is connected to the charging pile according to the second connection information.

16. The charging detection system according to any one of claims 13 to 15, characterized in that: The charging detection system also includes an AC charger; The battery management system is further configured to determine the resistance of the charging device based on the detection signal, determine a target current corresponding to the resistance of the charging device based on a preset correspondence between resistance and current and the resistance of the charging device, and send a charging request to the AC charger; The charging request includes the target current; The AC charger is used to charge the battery of the electrical device according to the target current.

17. The charging detection system according to any one of claims 13 to 15, characterized in that: The charging detection system further includes a communication controller; The communication controller is configured to send a wake-up signal to the battery management system after detecting a duty cycle signal output by the charging pile; The battery management system is configured to obtain the wake-up signal, perform a wake-up operation according to the wake-up signal, and obtain the detection signal output by the charging device interface circuit.

18. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 12 are implemented.

19. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 12 are implemented.

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