Detection method of vehicle-mounted fast charging module

Abstract

The invention discloses a detection method of a vehicle-mounted fast charging module. During screen projection function detection, the detection method comprises the following steps: step a, controlling a power supply module to power on the vehicle-mounted fast charging module; b, by controlling switching of signals in the type-c positive and negative switching circuit, the same video data are sent to the vehicle-mounted fast charging module through a positive interface and a negative interface of a type-c external interface in the vehicle-mounted fast charging module; c, the industrial personal computer collects data processed by the vehicle-mounted fast charging module, and whether the screen projection function passes detection is judged by comparing whether values of related characteristics in the received video data and the sent video data are within a preset range or not. The detection system and the detection method have the beneficial effects that the detection of the charging function and the screen projection function of the vehicle-mounted fast charging module is realized by designing the detection system of the vehicle-mounted fast charging module and the matched detection method, and the detection efficiency is high; two projection screen switching circuits are designed, so that bidirectional projection screen detection of the vehicle-mounted fast charging module is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle-mounted charging devices, and in particular relates to a detection method for a vehicle-mounted fast charging module. Background Art

[0002] With the development of the automobile market, people's demand for the functions of in-vehicle equipment is also increasing. Mobile devices such as mobile phones and tablets are equipped with fast charging modules with fast charging functions and video DP data transmission functions in the car. Patents such as CN220421457 U and CN 219739998 U disclose relevant technical solutions.

[0003] There are at least the following technical problems in the prior art: when testing the wired screen projection function of the fast charging module, it is necessary to use the screen projection function of terminal devices such as mobile phones and computers for testing, resulting in high testing costs and low testing efficiency. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a detection method for a vehicle-mounted fast charging module, which can realize the charging function detection and screen projection function detection of one or more vehicle-mounted fast charging modules in the same test equipment, which can greatly improve the product detection efficiency and reduce the testing cost.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a detection method for a vehicle-mounted fast charging module, based on a detection system for a vehicle-mounted fast charging module, the detection system includes an industrial computer, a power supply module for supplying power to the vehicle-mounted fast charging module, and a screen projection function detection module controlled by the industrial computer, the screen projection function detection module includes a type-c forward and reverse switching circuit, and the key is that the following steps are included in the screen projection function detection: Step a, controlling the power supply module to power on the vehicle-mounted fast charging module; Step b, by controlling the switching of the signal in the type-c forward and reverse switching circuit, the same video data is sent to the vehicle-mounted fast charging module through the front interface and the back interface of the type-c external interface in the vehicle-mounted fast charging module; Step c: The industrial computer collects data processed by the vehicle-mounted fast charging module, and determines whether the screen projection function passes the test by comparing the values ​​of relevant features in the received video data with those in the sent video data to see if they are within a preset range.

[0006] Furthermore, the relevant features include playback time, total number of frames, frame rate, resolution and bit rate.

[0007] Furthermore, the screen projection function detection module also includes a first screen projection switching circuit and a second screen projection switching circuit which are controlled by the industrial computer and realize two-way screen projection detection of the vehicle-mounted fast charging module. The first screen projection switching circuit includes a common end connected to the type-c external interface in the vehicle-mounted fast charging module, a forward screen projection input end connected to the type-c forward and reverse switching circuit, a reverse screen projection output end connected to the industrial computer, and a first switching switch for controlling the common end to be connected to the forward screen projection input end or the common end to be connected to the reverse screen projection output end; The second screen projection switching circuit includes a common end connected to the type-c internal interface in the vehicle-mounted fast charging module, a reverse screen projection input end connected to the type-c forward and reverse switching circuit, a forward screen projection output end connected to the industrial computer, and a second switching switch for controlling the common end to be connected to the reverse screen projection input end or the common end to be connected to the forward screen projection output end; When the forward projection function of the vehicle-mounted fast charging module is detected, the first projection switching circuit is configured so that the forward projection input terminal and the common terminal are electrically connected to the type-c forward and reverse switching circuit and the type-c external interface of the vehicle-mounted fast charging module respectively, and the second projection switching circuit is configured so that the common terminal and the forward projection output terminal are electrically connected to the internal interface of the vehicle-mounted fast charging module and the industrial control computer respectively; When the reverse screen projection function of the vehicle-mounted fast charging module is tested, the first screen projection switching circuit is configured so that the common end and the reverse screen projection output end are electrically connected to the type-c external interface of the vehicle-mounted fast charging module and the industrial control computer respectively, and the second screen projection switching circuit is configured so that the reverse screen projection input end and the common end are electrically connected to the type-c positive and negative switching circuit and the internal interface of the vehicle-mounted fast charging module respectively.

[0008] Furthermore, the detection system also includes a charging and screen projection switching circuit and a charging function detection module controlled by the industrial computer. The charging and projection switching circuit includes a common end connected to the forward projection input end of the first projection switching circuit and the reverse projection input end of the second projection switching circuit, a projection detection end connected to the output end of the type-c forward and reverse switching circuit, a charging detection end connected to the charging function detection module, and a detection switching switch for connecting the common end to the projection detection end or connecting the common end to the charging detection end.

[0009] Furthermore, when the forward projection function is detected, the common end of the charging projection switching circuit is controlled to be electrically connected to the forward projection input end of the first projection switching circuit, and the projection detection end is electrically connected to the output end of the type-c forward and reverse switching circuit; When performing reverse screen projection function detection, the common end of the charging screen projection switching circuit is controlled to be electrically connected to the reverse screen projection input end of the second screen projection switching circuit, and the screen projection detection end is electrically connected to the output end of the type-c forward and reverse switching circuit.

[0010] Furthermore, when performing charging function detection, the common end of the charging and projection switching circuit is controlled to be electrically connected to the positive projection input end of the first projection switching circuit, and the charging detection end is electrically connected to the charging detection module.

[0011] Furthermore, the charging function module includes a charging positive and negative switching circuit connected to the charging and screen projection switching circuit, a protocol spoofing circuit electrically connected to the charging positive and negative switching circuit, and a sampling circuit electrically connected to the protocol spoofing circuit and the industrial computer respectively.

[0012] Furthermore, the charging function detection includes the following steps: Step s1, configuring the charging forward and reverse switching circuit to be connected to the positive interface of the type-c external interface in the vehicle-mounted fast charging module, using the protocol deception circuit to trick the vehicle-mounted fast charging module into outputting the voltage and current under the supported charging protocol, and the sampling circuit transmits the collected voltage and current values ​​to the industrial computer; Step s2, configuring the charging forward and reverse switching circuit to be connected to the reverse interface of the type-c external interface in the vehicle-mounted fast charging module, and using the protocol deception circuit to trick the vehicle-mounted fast charging module into outputting the voltage and current under the supported charging protocol, and the sampling circuit transmits the collected voltage and current values ​​to the industrial computer; Step s3: The industrial computer compares the collected voltage and current values ​​with the preset charging range to determine whether the test is passed.

[0013] Furthermore, the vehicle-mounted fast charging module includes an external interface for connecting to an external electronic device and an internal interface for connecting to a vehicle computer, and both the external interface and the internal interface are type-c interfaces.

[0014] The beneficial effects of the present invention are: by designing a detection system and a matching detection method for a vehicle-mounted fast charging module, the charging function and screen projection function of the vehicle-mounted fast charging module are detected with high detection efficiency; by designing two screen projection switching circuits, two-way screen projection detection of the vehicle-mounted fast charging module is realized.

[0015] The present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of Embodiment 1 of the detection system of the vehicle-mounted fast charging module in the present invention; Figure 2 It is a schematic diagram of the second embodiment of the detection system of the vehicle-mounted fast charging module in the present invention.

[0017] In the attached drawings, 1. industrial computer, 2. type-c positive and negative switching circuit, 3. vehicle-mounted fast charging module, 4. power supply module, 5. first screen projection switching circuit, 6. second screen projection switching circuit, 7. charging screen projection switching circuit, 8. charging positive and negative switching circuit, 9. protocol deception circuit, 10. sampling circuit. DETAILED DESCRIPTION

[0018] See attached Figure 1 and 2 The present invention provides a detection system for a vehicle-mounted fast charging module, the detection system comprising a display screen, a speaker, a base, a positioning component, an industrial computer 1, a charging function detection module and a screen projection function detection module controlled by the industrial computer 1, a charging and screen projection switching circuit 7 for switching between charging function detection and screen projection function detection, and a power supply module 4 for supplying power to the vehicle-mounted fast charging module 3.

[0019] The positioning assembly includes a positioning seat provided on the base and having a positioning groove matching the shape of the vehicle-mounted fast charging module 3, a clamping plate for clamping the module in the positioning seat, and a clamping cylinder for driving the clamping plate to rise and fall. When the module is placed in the positioning seat for testing, the module is electrically connected to the power supply end of the power supply module.

[0020] One or more positioning components can be arranged on the base. Each positioning component is equipped with a set of power supply modules, screen projection function detection modules and charging function detection modules.

[0021] The vehicle-mounted fast charging module 3 includes a power supply interface, an external interface for connecting external electronic devices, and an internal interface for connecting the vehicle computer, wherein the external interface is a type-c interface, and the internal interface is a type-c or type-a interface. In this embodiment, both the internal and external interfaces are type-c interfaces. The circuit of the vehicle-mounted fast charging module 3 includes two type-c connectors, a PD controller, a DP switch, a multiplexing switch, and a video serializer. Among them, the PD controller includes a chip TPS25763, the DP switch includes a chip TUSB1064, the multiplexing switch includes a chip TS3USB221, and the video serializer includes a chip MAX96745.

[0022] The charging function detection module includes a charging positive and negative switching circuit 8 connected to the charging detection end of the charging and screen projection switching circuit 7, a protocol deception circuit 9 electrically connected to the charging positive and negative switching circuit 8, and a sampling circuit 10 electrically connected to the protocol deception circuit 9 and the industrial computer 1 respectively.

[0023] Screen projection function detection module embodiment 1: see attached Figure 1 In this embodiment, the vehicle-mounted fast charging module 3 has a one-way screen projection function, that is, electronic devices such as mobile phones and tablets can be projected to the vehicle computer through the vehicle-mounted fast charging module 3 in a one-way manner.

[0024] The charging and screen projection switching circuit 7 includes a common end connected to the external interface of the vehicle-mounted fast charging module 3, a screen projection detection end connected to the output end of the type-c positive and negative switching circuit 2, a charging detection end connected to the charging positive and negative switching circuit 8 in the charging function detection module, and a detection switching switch for connecting the common end and the screen projection detection end or connecting the common end and the charging detection end.

[0025] The screen projection function detection module includes a type-c positive and negative switching circuit 2 whose two ends are respectively electrically connected to the screen projection detection end of the charging screen projection switching circuit 7 and the industrial computer 1. The type-c positive and negative switching circuit 2 switches the signal to send video data to the positive and negative interfaces of the type-c external interface in the vehicle-mounted fast charging module 3 to realize the screen projection function detection.

[0026] When the screen projection function is detected, under the action of the detection switch, the common end of the charging screen projection switching circuit 7 is connected to the screen projection detection end. The video data enters the vehicle fast charging module 3 through the type-c positive and negative switching circuit 2 and the charging screen projection switching circuit 7 and is collected by the industrial computer 1, and then the sent video data and the received video data are compared to judge the screen projection function.

[0027] When the charging function is detected, under the action of the detection switch, the common end and the charging detection end in the charging screen switching circuit 7 are connected. The vehicle-mounted fast charging module 3 uses the charging screen switching circuit 7, the charging forward and reverse switching circuit 8, the protocol deception circuit 9 and the sampling circuit 10 to deceive the vehicle-mounted fast charging module 3 to output the voltage and current under the supported charging protocol, and then the industrial computer 1 judges the charging function by analyzing whether the voltage and current values ​​are within the preset range. The protocol deception circuit 9 includes a charging protocol deception chip, which has a built-in PD communication module. By handshaking communication with the chip of the vehicle-mounted fast charging module 3, the vehicle-mounted fast charging module 3 can output the required voltage and current to power the external product / simulated load.

[0028] Screen projection function detection module embodiment 2: see attached Figure 2 In this embodiment, the vehicle-mounted fast charging module 3 has a two-way screen projection function, that is, the two-way screen projection between the electronic device and the vehicle computer is realized through the vehicle-mounted fast charging module 3.

[0029] Different from the first embodiment, the screen projection function detection module in this embodiment also includes a first screen projection switching circuit 5 and a second screen projection switching circuit 6 which are controlled by the industrial computer 1 and realize two-way screen projection detection of the vehicle-mounted fast charging module 3.

[0030] The first screen projection switching circuit 5 includes a common end connected to the type-c external interface in the vehicle-mounted fast charging module 3, a forward screen projection input end connected to the common end of the charging screen projection switching circuit 7, a reverse screen projection output end connected to the industrial computer 1, and a first switching switch for controlling the common end to be connected to the forward screen projection input end or the common end to be connected to the reverse screen projection output end.

[0031] The second projection switching circuit 6 includes a common end connected to the type-c internal interface in the vehicle-mounted fast charging module 3, a reverse projection input end connected to the common end of the charging projection switching circuit 7, a forward projection output end connected to the industrial computer 1, and a second switching switch for controlling the connection between the common end and the reverse projection input end or the common end and the forward projection output end.

[0032] In the above switching circuit, the common end is a set of common wiring harnesses connected or matched with a set of pins in the internal or external type-c interface of the vehicle fast charging module 3, and the other end of the wiring harness is connected to the common end of the switch. The input end and the output end are a set of input wiring harnesses or output wiring harnesses corresponding to the common wiring harness, and the input wiring harness and the output wiring harness are respectively connected to the two connection ends of the switch, and the connection between the common wiring harness and the input wiring harness or the output wiring harness is realized through the action of the switch.

[0033] When the forward projection function of the vehicle fast charging module 3 is detected, the first projection switching circuit 5 is configured as a forward projection input terminal and a common terminal electrically connected to the common terminal of the charging projection switching circuit 7 and the type-c external interface of the vehicle fast charging module 3, and the second projection switching circuit 6 is configured as a common terminal and a forward projection output terminal electrically connected to the internal interface of the vehicle fast charging module 3 and the industrial computer 1, such as Figure 2 The solid line in the middle projection screen indicates that the arrow represents the direction of data transmission; When the reverse projection function of the vehicle fast charging module 3 is detected, the first projection switching circuit 5 is configured as a common end and a reverse projection output end electrically connected to the type-c external interface of the vehicle fast charging module 3 and the industrial computer 1 respectively, and the second projection switching circuit 6 is configured as a reverse projection input end and a common end electrically connected to the common end of the charging projection switching circuit 7 and the internal interface of the vehicle fast charging module 3 respectively. Figure 2 As shown in the dotted line in the reverse projection screen, the arrow represents the direction of data transmission.

[0034] Taking the second embodiment as an example, the detection method of the present invention includes screen projection function detection and charging function detection, wherein the screen projection function detection further includes forward screen projection function detection and reverse screen projection function detection.

[0035] The forward projection function test includes the following steps.

[0036] Step a: place and press the vehicle-mounted fast charging module 3 into the positioning seat, connect the detection cable to the internal and external interfaces of the module, and control the power supply module 4 to power on the vehicle-mounted fast charging module 3.

[0037] Step b. Under the control of the industrial computer 1, the common end of the charging screen projection switching circuit 7 is electrically connected to the screen projection detection end, the common end of the first screen projection switching circuit 5 is electrically connected to the positive screen projection input end, and the common end of the second screen projection switching circuit 6 is electrically connected to the positive screen projection output end.

[0038] The industrial computer 1 sends the video data to the vehicle-mounted fast charging module 3 through the type-c forward and reverse switching circuit 2 and the first projection screen switching circuit 5 to the front interface of the type-c external interface in the vehicle-mounted fast charging module 3; The type-c forward and reverse switching circuit 2 is activated, and the industrial computer 1 sends the video data to the vehicle-mounted fast charging module 3 through the type-c forward and reverse switching circuit 2 and the first projection switching circuit 5 to the reverse interface of the type-c external interface in the vehicle-mounted fast charging module 3.

[0039] Step c, the industrial computer 1 collects the data processed by the vehicle fast charging module 3 through the second projection switching circuit 6, and determines whether the projection functions of the front interface and the back interface pass the test by comparing the values ​​of the relevant features in the received video data and the sent video data. The relevant features include playback time, total number of frames, frame rate, resolution and bit rate. This step completes the forward projection function test of the vehicle fast charging module 3.

[0040] The reverse screen projection function detection includes the following steps.

[0041] Step a: Place the vehicle-mounted fast charging module 3 and press it into the positioning seat, connect the detection cable to the internal and external interfaces of the module, and control the power supply module 4 to power on the vehicle-mounted fast charging module 3. If other tests have been completed, ignore this step.

[0042] Step b. Under the control of the industrial computer 1, the common end of the charging screen projection switching circuit 7 is electrically connected to the screen projection detection end, the common end of the first screen projection switching circuit 5 is electrically connected to the reverse screen projection output end, and the common end of the second screen projection switching circuit 6 is electrically connected to the reverse screen projection input end.

[0043] The industrial computer 1 sends the video data to the vehicle-mounted fast charging module 3 through the type-c forward and reverse switching circuit 2 and the second projection screen switching circuit 6 to the front interface of the type-c internal interface in the vehicle-mounted fast charging module 3; The type-c forward and reverse switching circuit 2 is activated, and the industrial computer 1 sends the video data to the vehicle-mounted fast charging module 3 through the type-c forward and reverse switching circuit 2 and the second projection switching circuit 6 to the reverse interface of the type-c external interface in the vehicle-mounted fast charging module 3.

[0044] Step c, the industrial computer 1 collects the data processed by the vehicle fast charging module 3 through the first projection switching circuit 5, and determines whether the projection function of the front interface and the back interface of the internal interface passes the test by comparing the values ​​of the relevant features in the received video data and the sent video data. The relevant features include playback time, total number of frames, frame rate, resolution and bit rate. This step completes the reverse projection function test of the vehicle fast charging module 3.

[0045] When testing the screen projection function, the sent and received video data are also displayed on the display screen simultaneously. In addition to objective judgment based on the values ​​of relevant features, testers can also make subjective judgments based on clarity, saturation, contrast, and whether the picture is smooth without freezing or snow, and whether the sound is continuous, clear, and without unwanted sounds. The combination of the two can be used to comprehensively judge whether the screen projection function is qualified.

[0046] The charging function test includes the following steps.

[0047] Step s1, under the control of the industrial computer 1, configure the common end of the charging and projection switching circuit 7 to be electrically connected to the charging detection end, and the common end of the first projection switching circuit 5 to be electrically connected to the positive projection input end.

[0048] The charging forward and reverse switching circuit 8 is configured to be connected to the positive interface of the type-c external interface in the vehicle-mounted fast charging module 3, and the vehicle-mounted fast charging module 3 is tricked into outputting the voltage and current under the supported charging protocol through the protocol spoofing circuit 9. The sampling circuit 10 transmits the collected voltage and current values ​​to the industrial computer 1.

[0049] Step s2, configure the charging forward and reverse switching circuit 8 to be connected to the reverse interface of the type-c external interface in the vehicle-mounted fast charging module 3, and use the protocol deception circuit 9 to trick the vehicle-mounted fast charging module 3 into outputting the voltage and current under the supported charging protocol, and the sampling circuit 10 transmits the collected voltage and current values ​​to the industrial computer 1.

[0050] Step s3: The industrial computer 1 compares the collected voltage and current values ​​with the preset charging range to determine whether the detection is passed.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for detecting an on-board fast charging module, based on a detection system for the on-board fast charging module, the detection system comprising an industrial computer (1), a power supply module (4) for supplying power to the on-board fast charging module (3), and a screen projection function detection module controlled by the industrial computer (1), the screen projection function detection module comprising a type-c forward and reverse switching circuit (2), characterized in that: The following steps are included when testing the screen projection function: Step a, controlling the power supply module (4) to power the vehicle-mounted fast charging module (3); Step b, by controlling the switching of the signal in the Type-C forward and reverse switching circuit (2), the same video data is sent to the vehicle-mounted fast charging module (3) via the front interface and the back interface of the Type-C external interface in the vehicle-mounted fast charging module (3); Step c: the industrial computer (1) collects data processed by the vehicle-mounted fast charging module (3), and determines whether the screen projection function has passed the test by comparing the values ​​of relevant features in the received video data with those in the sent video data to see whether they are within a preset range.

2. The detection method according to claim 1, characterized in that: The relevant features include playback time, total number of frames, frame rate, resolution and bit rate.

3. The detection method according to claim 1, characterized in that: The screen projection function detection module further comprises a first screen projection switching circuit (5) and a second screen projection switching circuit (6) which are controlled by the industrial control computer (1) and implement bidirectional screen projection detection on the vehicle-mounted fast charging module (3). The first screen projection switching circuit (5) comprises a common terminal connected to the type-c external interface in the vehicle-mounted fast charging module (3), a forward screen projection input terminal connected to the type-c forward and reverse switching circuit (2), a reverse screen projection output terminal connected to the industrial computer (1), and a first switching switch for controlling the common terminal to be connected to the forward screen projection input terminal or the common terminal to be connected to the reverse screen projection output terminal; The second screen projection switching circuit (6) comprises a common terminal connected to the type-c internal interface in the vehicle-mounted fast charging module (3), a reverse screen projection input terminal connected to the type-c forward and reverse switching circuit (2), a forward screen projection output terminal connected to the industrial computer (1), and a second switching switch for controlling the common terminal to be connected to the reverse screen projection input terminal or the common terminal to be connected to the forward screen projection output terminal; When the forward projection function of the vehicle-mounted fast charging module (3) is detected, the first projection switching circuit (5) is configured such that the forward projection input terminal and the common terminal are respectively electrically connected to the type-c forward and reverse switching circuit (2) and the type-c external interface of the vehicle-mounted fast charging module (3), and the second projection switching circuit (6) is configured such that the common terminal and the forward projection output terminal are respectively electrically connected to the internal interface of the vehicle-mounted fast charging module (3) and the industrial computer (1); When the reverse screen projection function of the vehicle-mounted fast charging module (3) is detected, the first screen projection switching circuit (5) is configured as a common end and a reverse screen projection output end, which are respectively electrically connected to the type-c external interface of the vehicle-mounted fast charging module (3) and the industrial computer (1), and the second screen projection switching circuit (6) is configured as a reverse screen projection input end and a common end, which are respectively electrically connected to the type-c forward and reverse switching circuit (2) and the internal interface of the vehicle-mounted fast charging module (3).

4. The detection method according to claim 3, characterized in that: The detection system further comprises a charging and screen projection switching circuit (7) and a charging function detection module controlled by the industrial computer (1). The charging and projection switching circuit (7) includes a common terminal connected to the forward projection input terminal of the first projection switching circuit (5) and the reverse projection input terminal of the second projection switching circuit (6), a projection detection terminal connected to the output terminal of the type-c forward and reverse switching circuit (2), a charging detection terminal connected to the charging function detection module, and a detection switching switch for connecting the common terminal to the projection detection terminal or connecting the common terminal to the charging detection terminal.

5. The detection method according to claim 4, characterized in that: When performing a forward screen projection function test, the common end of the charging screen projection switching circuit (7) is electrically connected to the screen projection detection end, the common end of the first screen projection switching circuit (5) is electrically connected to the forward screen projection input end, and the common end of the second screen projection switching circuit (6) is electrically connected to the forward screen projection output end; When performing a reverse screen projection function test, the common end of the charging screen projection switching circuit (7) is electrically connected to the screen projection detection end, the common end of the first screen projection switching circuit (5) is electrically connected to the reverse screen projection output end, and the common end of the second screen projection switching circuit (6) is electrically connected to the reverse screen projection input end.

6. The detection method according to claim 4, characterized in that: When the charging function is detected, the common end of the charging screen projection switching circuit (7) is controlled to be electrically connected to the positive screen projection input end of the first screen projection switching circuit (5), and the charging detection end is electrically connected to the charging detection module.

7. The detection method according to claim 4, characterized in that: The charging function module comprises a charging positive and negative switching circuit (8) connected to the charging screen projection switching circuit (7), a protocol deception circuit (9) electrically connected to the charging positive and negative switching circuit (8), and a sampling circuit (10) electrically connected to the protocol deception circuit (9) and the industrial computer (1), respectively.

8. The detection method according to claim 7, characterized in that: The charging function detection comprises the following steps: Step s1, configuring the charging forward and reverse switching circuit (8) to be connected to the front interface of the Type-C external interface in the vehicle-mounted fast charging module (3), tricking the vehicle-mounted fast charging module (3) into outputting the voltage and current under the supported charging protocol through the protocol tricking circuit (9), and the sampling circuit (10) transmitting the collected voltage and current values ​​to the industrial control computer (1); Step s2, configuring the charging forward and reverse switching circuit (8) to be connected to the reverse interface of the Type-C external interface in the vehicle-mounted fast charging module (3), tricking the vehicle-mounted fast charging module (3) into outputting the voltage and current under the supported charging protocol through the protocol tricking circuit (9), and the sampling circuit (10) transmitting the collected voltage and current values ​​to the industrial control computer (1); Step s3: The industrial computer (1) compares the collected voltage and current values ​​with the preset charging range to determine whether the detection is passed.

9. The detection method according to any one of claims 1 to 8, characterized in that: The vehicle-mounted fast charging module (3) comprises an external interface for connecting to an external electronic device and an internal interface for connecting to a vehicle computer, and both the external interface and the internal interface are Type-C interfaces.

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