Relay adhesion diagnosis method and system and electric vehicle

Abstract

The invention relates to the technical field of new energy automobile charging, and discloses a relay adhesion diagnosis method and system and an electric automobile, and the relay adhesion diagnosis method comprises the steps: reducing the charging current of a charging pile to a first threshold value when the charging mode of a charging circuit is switched from a direct charging mode to a boost mode; a boost positive relay is closed, a fast charge positive relay is disconnected, current data flowing through the boost positive relay of the electric vehicle is collected, the boost positive relay of the electric vehicle is located in an impedance branch, and the fast charge positive relay of the electric vehicle is located in a non-impedance branch; and judging whether the quick-charge positive relay of the electric vehicle is adhered according to the current data of the electric vehicle. The adhesion state of the fast-charging positive relay is judged by dynamically adjusting the charging request current and comparing the current flowing through the boosting positive relay with the output current of the charging pile, and therefore the adhesion fault diagnosis method is provided to solve the problem that the adhesion fault of the fast-charging positive relay cannot be diagnosed in the charging process.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle charging, and in particular to a relay adhesion diagnosis method, system and electric vehicle. Background Art

[0002] At present, with the aggravation of environmental pollution and the deepening of the petrochemical energy crisis, energy-saving and environmentally friendly new energy electric vehicles have been developed and popularized. Power batteries are the main energy storage source for electric vehicles, especially pure electric vehicles, and relays are switching devices that realize power battery energy transmission. Under normal circumstances, the relay's on-off state is controlled by the VCU (Vehicle Control Unit) and BMS (Battery Management System), but when the relay is stuck, it is out of control, which may cause safety problems, so it is necessary to detect the relay's sticking state.

[0003] During the charging process, since the charging pile is still outputting voltage, the traditional voltage comparison method cannot confirm the adhesion state of the relay by comparing the voltage across the relay. If it is impossible to confirm whether the fast charging positive relay is sticking, if the relay is switched directly, it may cause damage to the power electronic devices, thereby affecting the reliability and safety of the charging system. Therefore, how to diagnose the adhesion failure of the relay during the charging process has become a key issue that needs to be solved urgently. Summary of the invention

[0004] In view of this, the present invention provides a relay adhesion diagnosis method, system and electric vehicle to solve or partially solve the problem that the fast charging positive relay adhesion fault cannot be diagnosed during the charging process.

[0005] In a first aspect, the present invention provides a relay adhesion diagnosis method, which is applied to a charging circuit of an electric vehicle, and the method comprises:

[0006] When the charging mode of the charging circuit is switched from the direct charging mode to the boost mode, the charging current of the charging pile is reduced to a first threshold value;

[0007] Close the boost positive relay, disconnect the fast charge positive relay, and collect current data flowing through the boost positive relay, the boost positive relay is located in the impedance branch, and the fast charge positive relay is located in the non-impedance branch;

[0008] Determine whether the fast-charging positive relay is stuck based on the current data.

[0009] The present invention provides a relay adhesion diagnosis method, which dynamically adjusts the charging request current, compares the current flowing through the boost positive relay and the output current of the charging pile to determine the adhesion state of the fast charging positive relay, thereby providing a adhesion fault diagnosis method to solve the problem that the fast charging positive relay adhesion fault cannot be diagnosed during the charging process.

[0010] In an optional implementation, judging whether the fast-charging positive relay is stuck according to the current data includes:

[0011] When the current data is less than a second threshold, it is determined that the fast charging positive relay is stuck;

[0012] When the current data is not less than a second threshold, it is determined that the fast charging positive relay is not stuck, and the second threshold is the product of a preset coefficient and the output current of the charging pile.

[0013] In an optional embodiment,

[0014] When the fast-charging positive relay becomes stuck, charging is terminated;

[0015] When the fast-charging positive relay is not stuck, a boost charging operation is performed.

[0016] In an optional implementation, current data flowing through the boost positive relay is collected by a boost device.

[0017] In an optional implementation, after executing the steps of closing the boost positive relay and opening the fast charge positive relay, the method further includes: increasing the charging current of the charging pile to a third threshold value.

[0018] In an optional embodiment, when executing the step of closing the boost positive relay, the positive switch of the boost device is also closed synchronously.

[0019] In a second aspect, the present invention provides a relay adhesion diagnosis system, the system comprising: a charging circuit and a controller, wherein:

[0020] The charging circuit and the controller are in communication connection with each other;

[0021] The controller includes: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the relay adhesion diagnosis method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0022] A relay sticking diagnosis system provided in this embodiment utilizes a charging circuit to complete charging of an electric vehicle, and determines whether a disconnected fast-charging positive relay is stuck by collecting the current flowing through the boost positive relay through a boost device, so as to solve the problem that a fast-charging positive relay sticking failure cannot be diagnosed during the charging process.

[0023] In an optional embodiment, the charging circuit includes: a main positive relay, a fast charge positive relay, a pre-charge relay, a main negative relay, a fast charge negative relay, a boost positive relay, a pre-charge group and a boost device, wherein:

[0024] The first end of the fast-charge positive relay is respectively connected to the first end of the main positive relay, the first end of the pre-charge group, the first end of the main negative relay, the first end of the fast-charge negative relay and the positive electrode of the battery, and the second end of the fast-charge positive relay is connected to the positive electrode of the DC charging port;

[0025] The second end of the main positive relay is connected to the first end of the boost device and the second end of the pre-charge relay respectively;

[0026] The second end of the pre-charging group is connected to the first end of the pre-charging relay;

[0027] The second end of the main negative relay is connected to the second end of the boost device;

[0028] The second end of the fast charging negative relay is connected to the negative electrode of the DC charging port;

[0029] The first end of the boost positive relay is connected to the third end of the boost device, and the second end of the boost positive relay is connected to the positive electrode of the DC charging port.

[0030] In a third aspect, the present invention provides an electric vehicle, comprising: the relay adhesion diagnostic system of the second aspect or any corresponding embodiment thereof.

[0031] The electric vehicle of the embodiment of the present invention determines whether the disconnected fast-charging positive relay is stuck through the above-mentioned relay sticking detection system, so as to solve the problem that the sticking fault of the fast-charging positive relay cannot be diagnosed during the charging process, and avoids the cost and EMC problems caused by the newly added high-voltage sampling circuit.

[0032] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions are used to enable a computer to execute the relay adhesion diagnosis method of the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the charging circuit structure of an electric vehicle;

[0035] Figure 2 is a schematic diagram of a direct charging process according to an embodiment of the present invention;

[0036] Figure 3 is a flow chart of a relay adhesion diagnosis method according to an embodiment of the present invention;

[0037] Figure 4 is a schematic diagram of a boost charging process according to an embodiment of the present invention;

[0038] Figure 5 It is another schematic diagram of the charging circuit structure of an electric vehicle;

[0039] Figure 6 Schematic diagram of the hardware structure of an electric vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0041] Electric vehicle charging circuit Figure 1 As shown in the figure, this high-voltage architecture is mainly composed of six key components: main positive relay, fast charge positive relay, pre-charge relay, main negative relay, fast charge negative relay and boost positive relay. Among them, the main positive relay and the main negative relay are responsible for connecting or disconnecting the connection between the battery and the vehicle circuit; the fast charge positive relay and the fast charge negative relay are used to establish a direct connection between the charging pile and the battery during fast charging; the function of the pre-charge relay is to pre-charge the vehicle capacitor before applying high voltage to protect the battery and the vehicle from high current shock; the boost positive relay is the key component to achieve boost charging.

[0042] At present, the battery voltage of electric vehicles has been increased to 800V, but the voltage level of most charging piles in the market is 750V or even 500V. For these 750V or even 500V charging piles, most manufacturers in the industry use motors to increase the charging voltage to 800V to perform boost charging. When performing boost charging, electric vehicles need to obtain the voltage level of the charging pile by detecting the insulation voltage of the charging pile. Since some charging piles are not fully implemented in accordance with the national standard process, 800V-level electric vehicles have been charging in boost mode, which will not be able to use the full power of the charging pile.

[0043] Based on the above problems, the direct charging strategy can be implemented first during the boost charging process to fully utilize the charging pile's capacity, and then switch to the boost circuit charging after the conditions for direct charging switching to boost are met. Figure 2 As shown, first, when the electric vehicle is ready to plug in the DC charging gun for DC charging, the vehicle will establish an electrical connection with the charging pile by closing the fast charging positive relay and the fast charging negative relay. Then, the vehicle will send a request to the charging pile, asking the charging pile to output current for normal DC charging. At this time, the current direction is from the charging pile through the fast charging relay to the positive pole of the battery, and then from the negative pole of the battery through the fast charging relay back to the charging pile. At this stage, the vehicle begins to receive electrical energy from the charging pile to charge the battery. This is a normal DC charging process that maximizes the use of the charging output capacity.

[0044] When the conditions for switching to boost charging are met, it is necessary to switch to boost circuit charging. Before performing boost circuit charging, it is necessary to diagnose whether the fast-charging positive relay is stuck. Since the charging pile is still outputting voltage at this time, the traditional voltage comparison method cannot confirm the adhesion state of the relay by comparing the voltage across the relay. If the boost circuit charging is performed directly without confirming whether the fast-charging positive relay is stuck, it may cause damage to the power electronic devices, thereby affecting the reliability and safety of the charging system.

[0045] According to an embodiment of the present invention, an embodiment of a relay adhesion diagnosis method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0046] In this embodiment, a relay adhesion diagnosis method is provided, which is applied to Figure 1 The charging circuit of the electric vehicle is shown. Figure 3 is a flow chart of a relay adhesion diagnosis method according to an embodiment of the present invention. Figure 3 As shown, the process includes the following steps:

[0047] Step S11, when the charging mode of the charging circuit is switched from the direct charging mode to the boost mode, the charging current of the charging pile is reduced to a first threshold value.

[0048] Specifically, when the conditions for switching to boost charging are met, the charging mode of the charging circuit needs to be switched from direct charging mode to boost mode. In order to avoid relay adhesion failure as much as possible, the vehicle will send a new current request to the charging pile, requiring it to reduce the charging current to the first threshold. The first threshold can be 10A, which is only used as an example and is not limited to this.

[0049] Step S12, close the boost positive relay, disconnect the fast charge positive relay, collect current data flowing through the boost positive relay, the boost positive relay is located in the impedance branch, and the fast charge positive relay is located in the non-impedance branch.

[0050] Specifically, the boost charging process is as follows: Figure 4 As shown, when the battery's charging state reaches the preset direct charge to boost condition, the vehicle will automatically adjust the charging strategy. At this time, the vehicle will close the boost relay and request to close the positive switch of the boost device to ensure that the boost device can be properly connected to the charging circuit. Then, the vehicle will request to disconnect the fast charge positive relay. After requesting the fast charge positive relay to disconnect, the vehicle will send a current request to the charging pile again, requiring the charging pile to increase the charging current to the third threshold. Finally, the vehicle will collect current data flowing through the boost positive relay through the boost device. Among them, the third threshold can be selected as 20A, which is only used as an example and is not limited to this.

[0051] Step S13, judging whether the fast charging positive relay is stuck according to the current data.

[0052] Specifically, the current flowing through the boost positive relay collected by the boost device is used to determine whether the disconnected fast charging positive relay is stuck. If the current flowing through the boost positive relay is small, it indicates that most of the current flows from the fast charging positive relay to the battery. It is considered that the fast charging positive relay is stuck at this time and a direct request is made to end charging. If the current flowing through the boost positive relay meets the theoretical value, it is considered that the fast charging positive relay is normal and the next step of boost charging can be performed until the SOC (State of Charge) set by the user is charged.

[0053] The present invention provides a relay adhesion diagnosis method, comprising: when the charging mode of the charging circuit is switched from the direct charging mode to the boost mode, reducing the charging current of the charging pile to a first threshold value; closing the boost positive relay, disconnecting the fast charging positive relay, collecting current data flowing through the boost positive relay of the electric vehicle, the boost positive relay of the electric vehicle is located in an impedance branch, and the fast charging positive relay of the electric vehicle is located in a non-impedance branch; judging whether the fast charging positive relay of the electric vehicle is adhered according to the electric vehicle current data. By dynamically adjusting the charging request current, comparing the current flowing through the boost positive relay and the output current of the charging pile to judge the adhesion state of the fast charging positive relay, thereby providing a method for diagnosing adhesion faults to solve the problem that the adhesion fault of the fast charging positive relay cannot be diagnosed during the charging process.

[0054] In an optional implementation, step S13 includes:

[0055] Step S131, when the current data is less than the second threshold, it is determined that the fast charging positive relay is stuck.

[0056] Step S132, when the current data is not less than the second threshold, it is determined that the fast charging positive relay is not stuck, and the second threshold is the product of a preset coefficient and the output current of the charging pile.

[0057] Specifically, if the fast charging positive relay is stuck, the boost positive relay circuit will be short-circuited, and most of the current will flow through the fast charging positive relay. Therefore, by comparing the current flowing through the boost positive relay and the output current of the charging pile, it is possible to comprehensively judge whether the fast charging positive relay is stuck.

[0058] Furthermore, if the current flowing through the boost positive relay is less than the preset coefficient * the output current of the charging pile, it is considered that the fast charging positive relay is stuck and the charging is directly requested to end. If the current flowing through the boost positive relay is not less than the preset coefficient * the output current of the charging pile, it is considered that the fast charging positive relay can perform the boost charging operation normally, that is, the battery is charged by the boost device on the charging pile of conventional voltage until it is charged to the SOC set by the user. Among them, the preset coefficient is adjusted according to the parameters of the boost device.

[0059] In an optional implementation, since the boost device is internally provided with impedance, the main negative relay can be regarded as a relay on a branch with impedance, and the fast charge negative relay can be regarded as a relay on a branch without impedance. Therefore, the fast charge negative relay and the main negative relay can also be diagnosed by the above method. Figure 5 As shown, under the premise of closing the main negative relay and the boost negative relay, the current flowing through the main negative relay is judged. If the current flowing through the main negative relay is too small, the fast charging negative relay is in a sticking state. If the current flowing through the main negative relay conforms to the theoretical value, the fast charging negative relay is normal.

[0060] Specifically, for two parallel-connected relays 1 with impedance and relays 2 without impedance, relay 1 can be closed and combined with the magnitude of the current flowing through relay 1 to determine whether relay 2 without impedance is stuck.

[0061] This embodiment provides a relay adhesion diagnosis system, including: a charging circuit and a controller, wherein the charging circuit and the controller are communicatively connected with each other.

[0062] Specifically, Figure 1 As shown, the charging circuit includes: a main positive relay, a fast charging positive relay, a pre-charging relay, a main negative relay, a fast charging negative relay, a boost positive relay, a pre-charging group and a boost device. Among them, the first end of the fast charging positive relay is respectively connected to the first end of the main positive relay, the first end of the pre-charging group, the first end of the main negative relay, the first end of the fast charging negative relay and the positive pole of the battery, and the second end of the fast charging positive relay is connected to the positive pole of the DC charging port. The second end of the main positive relay is respectively connected to the first end of the boost device and the second end of the pre-charging relay. The second end of the pre-charging group is connected to the first end of the pre-charging relay. The second end of the main negative relay is connected to the second end of the boost device. The second end of the fast charging negative relay is connected to the negative pole of the DC charging port. The first end of the boost positive relay is connected to the third end of the boost device, and the second end of the boost positive relay is connected to the positive pole of the DC charging port.

[0063] Furthermore, the main positive relay and the main negative relay are responsible for connecting or disconnecting the battery from the vehicle circuit; the fast charge positive relay and the fast charge negative relay are used to establish a direct connection between the charging pile and the battery during fast charging; the pre-charge relay is used to pre-charge the vehicle capacitor before applying high voltage to protect the battery and the vehicle from high current shock; the boost positive relay is a key component for boost charging. The boost device is used to increase the charging voltage and collect the current flowing through the boost positive relay.

[0064] When charging is performed, the controller controls the fast-charge positive relay and the fast-charge negative relay to close, and the current direction is from the charging pile through the fast-charge positive relay to the positive electrode of the battery, and then from the negative electrode of the battery through the fast-charge negative positive relay back to the charging pile. When the conditions for switching to boost charging are met, the controller controls the boost positive relay to close and disconnects the fast-charge positive relay at the same time. At this time, the controller controls the boost device to collect current data flowing through the boost positive relay. The current flowing through the boost positive relay collected by the boost device is used to determine whether the disconnected fast-charge positive relay is adhered.

[0065] A relay sticking diagnosis system provided in this embodiment utilizes a charging circuit to complete charging of an electric vehicle, and determines whether a disconnected fast-charging positive relay is stuck by collecting the current flowing through the boost positive relay through a boost device, so as to solve the problem that a fast-charging positive relay sticking failure cannot be diagnosed during the charging process.

[0066] An embodiment of the present invention further provides an electric vehicle, comprising the above-mentioned relay adhesion diagnosis system.

[0067] Specifically, the electric vehicle of the embodiment of the present invention determines whether the disconnected fast-charging positive relay is stuck through the above-mentioned relay sticking detection system, so as to solve the problem that the sticking fault of the fast-charging positive relay cannot be diagnosed during the charging process, and avoids the cost and EMC problems caused by the newly added high-voltage sampling circuit.

[0068] Figure 6 is a schematic diagram of the structure of a controller provided by an optional embodiment of the present invention, such as Figure 6 As shown, the controller includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the controller, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple controllers can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 6 A processor 10 is taken as an example.

[0069] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0070] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0071] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the controller, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the controller via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0072] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0073] The controller further comprises a communication interface 30 for the controller to communicate with other devices or a communication network.

[0074] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0075] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A relay adhesion diagnosis method, characterized in that: Applied to a charging circuit of an electric vehicle, the method comprises: When the charging mode of the charging circuit is switched from the direct charging mode to the boost mode, the charging current of the charging pile is reduced to a first threshold value; Close the boost positive relay, disconnect the fast charge positive relay, and collect current data flowing through the boost positive relay, the boost positive relay is located in the impedance branch, and the fast charge positive relay is located in the non-impedance branch; Determine whether the fast-charging positive relay is stuck based on the current data.

2. The relay adhesion diagnosis method according to claim 1, characterized in that: Judging whether the fast-charging positive relay is stuck according to the current data includes: When the current data is less than a second threshold, it is determined that the fast charging positive relay is stuck; When the current data is not less than a second threshold, it is determined that the fast charging positive relay is not stuck, and the second threshold is the product of a preset coefficient and the output current of the charging pile.

3. The relay adhesion diagnosis method according to claim 2, characterized in that: When the fast-charging positive relay becomes stuck, charging is terminated; When the fast-charging positive relay is not stuck, a boost charging operation is performed.

4. The relay adhesion diagnosis method according to claim 1, characterized in that: The method further includes: collecting current data flowing through the boost positive relay through a boost device.

5. The relay adhesion diagnosis method according to claim 1, characterized in that: After executing the steps of closing the boost positive relay and opening the fast charge positive relay, the method further includes: increasing the charging current of the charging pile to a third threshold value.

6. The relay adhesion diagnosis method according to claim 1, characterized in that: The method further comprises: when executing the step of closing the boost positive relay, also synchronously closing the positive switch of the boost device.

7. A relay adhesion diagnosis system, characterized in that: The system comprises: a charging circuit and a controller, wherein: The charging circuit and the controller are in communication connection with each other; The controller includes: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the relay adhesion diagnosis method according to any one of claims 1 to 6 by executing the computer instructions.

8. The relay adhesion diagnosis system according to claim 7, characterized in that: The charging circuit includes: a main positive relay, a fast charge positive relay, a pre-charge relay, a main negative relay, a fast charge negative relay, a boost positive relay, a pre-charge group and a boost device, wherein: The first end of the fast-charge positive relay is respectively connected to the first end of the main positive relay, the first end of the pre-charge group, the first end of the main negative relay, the first end of the fast-charge negative relay and the positive electrode of the battery, and the second end of the fast-charge positive relay is connected to the positive electrode of the DC charging port; The second end of the main positive relay is connected to the first end of the boost device and the second end of the pre-charge relay respectively; The second end of the pre-charging group is connected to the first end of the pre-charging relay; The second end of the main negative relay is connected to the second end of the boost device; The second end of the fast charging negative relay is connected to the negative electrode of the DC charging port; The first end of the boost positive relay is connected to the third end of the boost device, and the second end of the boost positive relay is connected to the positive electrode of the DC charging port.

9. An electric vehicle, characterized in that: include: A relay adhesion diagnostic system as claimed in any one of claims 7 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the relay adhesion diagnosis method according to any one of claims 1 to 6.

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