CN113635805A

CN113635805A - Charging fault detection method and device and computer readable storage medium

Info

Publication number: CN113635805A
Application number: CN202111077409.XA
Authority: CN
Inventors: 黄小洪; 邵杰; 邓海文; 汤佩文; 刘洪世
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2021-11-12
Anticipated expiration: 2041-09-14
Also published as: CN113635805B

Abstract

The invention discloses a charging fault detection method, a charging fault detection device and a computer readable storage medium, wherein the charging fault detection method comprises the following steps: determining the current working state when the charging is failed; and acquiring a charging parameter corresponding to the current working state, and if the charging parameter is abnormal, determining a fault reason according to the abnormal charging parameter. The invention can solve the technical problem that the fault detection is difficult when the conventional electric automobile is charged by using the alternating current charging gun.

Description

Charging fault detection method and device and computer readable storage medium

Technical Field

The present invention relates to the field of charging technologies, and in particular, to a charging fault detection method and apparatus, and a computer-readable storage medium.

Background

With the increasingly accelerated social development, the energy consumption is more and more intense, and the environment and ecology are increasingly worsened. Under the promotion of global energy crisis and environmental deterioration, the new energy automobile becomes a new energy vehicle because the influence on the environment is smaller than that of the traditional automobile, and the prospect is widely seen. Along with the popularization and development of electric vehicles, the alternating current charging gun is an important component of a charging system, and the demand is increasing. When an electric automobile is charged by using an alternating current charging gun, charging faults often occur, so that the vehicle cannot be charged or charging is interrupted. At present, when the electric automobile is charged by using the alternating current charging gun, more faults still need to be checked by depending on the experience of professionals, so that the fault detection is difficult when the electric automobile is charged by using the alternating current charging gun at present.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide a charging fault detection method, a charging fault detection device and a computer readable storage medium, and aims to solve the technical problem that fault detection is difficult when an electric automobile is charged by using an alternating current charging gun at present.

In order to achieve the above object, the present invention provides a charging fault detection method, including:

determining the current working state when the charging is failed;

and acquiring a charging parameter corresponding to the current working state, and if the charging parameter is abnormal, determining a fault reason according to the abnormal charging parameter.

Optionally, the step of obtaining the charging parameter corresponding to the current working state, and if the charging parameter is abnormal, determining a cause of the fault according to the abnormal charging parameter includes:

if the current working state is a state to be charged, acquiring a first CC signal parameter and a first CP signal parameter corresponding to the state to be charged, wherein the charging parameter corresponding to the state to be charged comprises the first CC signal parameter and the first CP signal parameter;

and if the state of the first CC signal parameter and/or the first CP signal parameter is not the connected state, determining a fault reason because the CC signal terminal and/or the CP signal terminal has a fault according to the first CC signal parameter and the first CP signal parameter.

if the current working state is a normal charging state, acquiring a second CC signal parameter and a second CP signal parameter corresponding to the normal charging state, wherein the charging parameter corresponding to the normal charging state comprises the second CC signal parameter and the second CP signal parameter;

and if the second CC signal parameter and the second CP signal parameter are abnormal, determining a fault reason according to the second CC signal parameter and the second CP signal parameter.

Optionally, if the second CC signal parameter and the second CP signal parameter are abnormal, the step of determining a failure cause according to the second CC signal parameter and the second CP signal parameter includes:

and if the state of the second CC signal parameter is an unconnected state and the state of the second CP signal parameter is an abnormal state, determining that the second CC signal parameter and the second CP signal parameter are abnormal, and determining that the fault reason is charging gun charging wire fault.

Optionally, if the second CC signal parameter and the second CP signal parameter are abnormal, the step of determining a failure cause according to the second CC signal parameter and the second CP signal parameter further includes:

and if the state of the second CC signal parameter is a connected state and the state of the second CP signal parameter is an abnormal state, determining that the second CP signal parameter is abnormal, and determining that the fault reason is abnormal charging gun or functional fault of the vehicle-mounted charger for detecting the CP signal.

and if the state of the second CC signal parameter is a semi-connection state and the state of the second CP signal parameter is a connected state, determining that the second CC signal parameter is abnormal, and determining that the failure reason is that the charging gun microswitch is failed.

Optionally, after the step of obtaining the charging parameter corresponding to the current operating state, the method further includes:

and if the charging parameters are normal, determining that the fault reason is the fault of the charging gun.

Optionally, before the step of determining the current operating state at the time of the charging fault, the method further includes:

acquiring self-checking information of a charging gun, and determining that the charging gun has a fault if the self-checking information is abnormal;

if the self-checking information is normal, executing the following steps: and determining the current working state when the charging is failed.

In addition, in order to achieve the above object, the present invention further provides a charging failure detection apparatus, which includes a memory, a processor, and a charging failure detection program stored on the memory and operable on the processor, wherein the charging failure detection program, when executed by the processor, implements the steps of the charging failure detection method as described above.

Further, to achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon a charging failure detection program which, when executed by a processor, realizes the steps of the charging failure detection method as described above.

The invention provides a charging fault detection method, a charging fault detection device and a computer readable storage medium, which are used for determining the current working state during charging fault; and acquiring a charging parameter corresponding to the current working state, and if the charging parameter is abnormal, positioning a fault reason according to the abnormal charging parameter. Through the mode, the charging parameter feedback corresponding to different working states is obtained, and the current state during charging fault is determined, so that the fault reason is clearly positioned in time according to the charging parameters, the safety of the charging process is guaranteed, the problems of large manual workload and low accuracy are avoided, and the charging fault detection efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of an apparatus in a hardware operating environment according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating a charging fault detection method according to a first embodiment of the present invention;

fig. 3 is a schematic diagram of a connection structure of an application scenario according to an embodiment of the present invention;

fig. 4 is a schematic diagram of state transition of an application scenario according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the descriptions relating to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.

The device of the embodiment of the invention can be a terminal device such as a PC (personal computer), a portable computer, a server and the like.

As shown in fig. 1, the apparatus may include: a processor 1001, such as a CPU (Central Processing Unit), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.

Those skilled in the art will appreciate that the configuration of the device shown in fig. 1 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a charging failure detection program.

In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the charging failure detection program stored in the memory 1005 and perform the following operations:

determining the current working state when the charging is failed;

Based on the hardware structure, the invention provides various embodiments of the charging fault detection method.

The invention provides a charging fault detection method.

Referring to fig. 2, fig. 2 is a flowchart illustrating a charging failure detection method according to a first embodiment of the present invention.

In this embodiment, the charging fault detection method includes:

step S10, determining the current working state when charging is failed;

in this embodiment, when charging fails or charging is interrupted, the current operating state at the time of the charging failure can be determined. The operating state of charging the electric vehicle using the ac charging gun may include: the system comprises an initial state, a state to be connected, a state to be charged, a normal charging state, a charging completion state and a gun pulling state. In this embodiment, each working state correspondingly includes a corresponding charging parameter, and when a charging fault occurs in the vehicle, the corresponding current working state at the time of the charging fault is determined, the charging parameter corresponding to the current working state is acquired, and whether the charging parameter is abnormal or not can be detected. If the charging parameters are abnormal, the specific reason of the charging fault can be located according to the abnormal charging parameters, and fault prompts corresponding to the abnormal charging parameters can be output. The present embodiment can reduce the scope of troubleshooting by determining the current operating state at the time of the charging failure.

For specific description, in this embodiment, referring to fig. 3, as shown in fig. 3, an input end of an ac charging gun is connected to an ac power grid, an output end of the ac charging gun is used for being connected to a vehicle-mounted charger, a gun head of the charging gun is inserted into a charging interface of the vehicle-mounted charger, at this time, an insertion terminal in the gun head is connected to a docking terminal of the vehicle-mounted charger for charging, the terminal includes a power signal terminal and a confirmation signal terminal, where the power signal terminal includes: an alternating current power supply L, a zero line N and a protection grounding PE; the confirmation signal terminal includes: a charging connection confirmation CC terminal and a control pilot confirmation CP terminal.

The specific process of charging the electric vehicle by using the ac charging gun in this embodiment can be seen in fig. 4, where: the alternating current charging gun is connected with an alternating current power grid and is not connected with a vehicle-mounted charger interface, the alternating current charging gun carries out power-on self-test, and the voltage value output by the CP at the moment is 12V; in the state to be connected: if the charging gun self-checks, the charging gun can jump to a to-be-connected state, namely the gun head is to be connected with the interface of the vehicle-mounted charger, and if the gun head is connected with the interface of the vehicle-mounted charger, the voltage value output by the CP is reduced from 12V to 9V through a resistor in the vehicle-mounted charger, namely the voltage value output by the CP is 9V in the to-be-connected state; in the state to be charged: after the charging gun control device detects that the voltage value output by the CP is reduced to 9V from 12V, an internal switch S1 of the charging gun is connected to the PWM end to enable the CP to output a PWM level signal with the peak value of 9V, and then the charging gun jumps to a state to be charged, namely the voltage value output by the CP in the state to be charged is the PWM level signal with the peak value of 9V; normal state of charge: and the vehicle control device carries out self-checking, and closes the switch S2 after the vehicle control device carries out self-checking normally and detects a PWM level signal with a peak value of 9V, so that the peak value of the PWM positive half cycle signal of the CP circuit is reduced from 9V to 6V, the relay is controlled to be closed, and 220V alternating current is output to the vehicle-mounted charger for supplying power. When charging is completed, i.e., charging completion state: the vehicle control device disconnects S2, the peak value of the PWM positive half cycle signal of the CP circuit rises back to 9V, and the charging gun jumps from the normal charging state to the state to be charged; the gun drawing state: and after the charging gun control device detects that the CP voltage is changed from 6V PWM to 9V PWM, the output of PWM is stopped, and the charging gun jumps to a state to be connected. The charging gun closes the relay to close the 220V AC, the charging gun control device switches the S1 switch to 12V to complete charging, and an operator pulls out the gun. The charging gun microswitch S3 on the charging gun can trigger the vehicle control device to stop charging and disconnect S2, so that the charging gun closes the relay to complete charging.

Step S20, acquiring the charging parameters corresponding to the current working state, and if the charging parameters are abnormal, positioning the fault reason according to the abnormal charging parameters;

in the charging process of the vehicle, the charging parameters corresponding to the current working state are detected in real time, for example, the charging parameters corresponding to the state to be charged may include CC signal parameters and CP signal parameters, the charging parameter information is uploaded to the entire vehicle CAN bus, when a charging fault occurs, the current working state when the fault occurs is determined, the charging parameters corresponding to the current working state are obtained, and whether the charging parameters are abnormal or not CAN be determined according to preset determination conditions. If the charging parameters are abnormal, the fault reason can be positioned according to the abnormal charging parameters. The charging parameters corresponding to each state further comprise a voltage output value output by the CP end corresponding to each state, the voltage output value output by the CP end which normally operates in each state is determined, whether the input and output voltage and current of the vehicle-mounted charger are abnormal or not can be judged according to a preset standard normal voltage value by acquiring the voltage output value output by the CP end in each state, and if the voltage output value is different from the preset standard voltage value, the input and output voltage and current of the vehicle-mounted charger can be determined to be abnormal.

Specifically, in step S20, the step of obtaining the charging parameter corresponding to the current operating state, and if the charging parameter is abnormal, locating the cause of the fault according to the abnormal charging parameter includes:

a1, if the current working state is a state to be charged, acquiring a first CC signal parameter and a first CP signal parameter corresponding to the state to be charged, wherein the charging parameter corresponding to the state to be charged includes the first CC signal parameter and the first CP signal parameter;

in this embodiment, if it is determined that the current working state is the to-be-charged state, the charging parameter corresponding to the to-be-charged state includes the first CC signal parameter and the first CP signal parameter, and in this embodiment, when a failure occurs in vehicle charging, it is determined that the current working state of the failure is the to-be-charged state, and then the first CC signal parameter and the first CP signal parameter corresponding to the to-be-charged state may be correspondingly obtained in the vehicle CAN message. The CC signal is a charging connection confirmation signal and is used for detecting whether the alternating current charging gun is normally connected with the vehicle-mounted charger or not. The CP signal is a control pilot confirmation signal, and mainly functions as a charge pilot.

Step a2, if the state of the first CC signal parameter and/or the first CP signal parameter is not a connected state, determining a failure reason because the CC signal terminal and/or the CP signal terminal has a failure according to the first CC signal parameter and the first CP signal parameter.

In this embodiment, it may be detected whether the states of the first CC signal parameter and the first CP signal parameter corresponding to the to-be-charged state are both connected states, and if the state of the first CC signal parameter and/or the state of the first CP signal parameter shows that they are not connected states, it indicates that there may be a connection abnormality in the CC signal terminal and/or the CP signal terminal, a failure of the CC signal terminals and/or the CP signal terminals may be specifically determined based on the detected current first CC signal parameters and first CP signal parameters, e.g., if the first CC signal parameters are not connected, the fault may be caused by a fault such as a foreign object existing on the CC signal terminal of the interface between the ac charging gun and the vehicle-mounted charger or a pin withdrawing, and similarly, if the first CP signal is not connected, the fault may be caused by a fault such as a foreign object existing in a CP signal terminal of an interface between the ac charging gun and the vehicle-mounted charger or a needle withdrawing.

In the present embodiment, the states of the CC signal parameters include unconnected, semi-connected, and connected states, which may be represented by numbers 0, 1, and 2, respectively; the states of the CP signal parameters include unconnected, abnormal, and connected states, which may be represented by the numbers 0, 1, and 2, respectively.

The embodiment of the invention provides a charging fault detection method, which comprises the steps of firstly confirming the current working state during charging fault, then obtaining the charging parameter corresponding to the current working state, detecting whether the charging parameter is abnormal, and if the charging parameter is abnormal, positioning the specific reason of the fault according to the abnormal charging parameter, so that a user or a technician can quickly position the fault reason, a large amount of workload of manual troubleshooting test is saved, and the vehicle charging fault detection efficiency is improved.

Further, based on the above-described first embodiment, a second embodiment of the charging failure detection method of the present invention is proposed.

In this embodiment, the step S20 further includes:

step b1, if the current working state is a normal charging state, acquiring a second CC signal parameter and a second CP signal parameter corresponding to the normal charging state, wherein the charging parameter corresponding to the normal charging state includes the second CC signal parameter and the second CP signal parameter;

step b2, if the second CC signal parameter and the second CP signal parameter are abnormal, determining a failure cause according to the second CC signal parameter and the second CP signal parameter.

In this embodiment, if it is determined that the current operating state is the normal charging state, the charging parameters corresponding to the normal charging state may include a second CC signal parameter and a second CP signal parameter. In this embodiment, when a vehicle charging fault occurs, if it is determined that the current working state of the fault is a normal charging state, the second CC signal parameter and the second CP signal parameter corresponding to the normal charging state may be correspondingly obtained in the vehicle CAN message, and if the second CC signal parameter and the second CP signal parameter are abnormal, the specific reason for the fault occurrence may be determined according to the second CC signal parameter and the second CP signal parameter. In order to distinguish the first CC signal and the first CP signal in the to-be-charged state in the first embodiment, the CC signal parameter and the CP signal parameter corresponding to the normal charging state in this embodiment are the second CC signal parameter and the second CP signal parameter.

In this embodiment, in the step b2, if the second CC signal parameter and the second CP signal parameter are abnormal, the step of determining the cause of the fault according to the second CC signal parameter and the second CP signal parameter includes:

step b21, if the state of the second CC signal parameter is an unconnected state and the state of the second CP signal parameter is an abnormal state, determining that the second CC signal parameter and the second CP signal parameter are abnormal, and determining that the failure cause is charging gun charging wire failure.

In this embodiment, when the current working state of the fault is determined to be the normal charging state, a second CC signal parameter and a second CP signal parameter corresponding to the normal charging state are obtained, and whether the second CC signal parameter and the second CP signal parameter are abnormal is detected, if the state of the second CC signal parameter is the unconnected state, it is indicated that the ac charging gun and the vehicle-mounted charger are in the unconnected state, if the state of the second CP signal parameter is the unconnected state, it is indicated that the vehicle-mounted control terminal does not detect a CP signal, and a CP terminal of the ac charging gun and a receiving terminal corresponding to the vehicle-mounted charger are unconnected, that is, at this time, the second CC signal parameter and the second CP signal parameter are both abnormal parameters. It is determined that the cause of the fault may be a fault in the charging cord of the charging gun.

Further, in step b2, if the second CC signal parameter and the second CP signal parameter are abnormal, the step of determining a failure cause according to the second CC signal parameter and the second CP signal parameter further includes:

and b22, if the state of the second CC signal parameter is a connected state and the state of the second CP signal parameter is an abnormal state, determining that the second CP signal parameter is abnormal, and determining that the fault reason is charging gun abnormality or the function fault of the vehicle-mounted charger detecting CP signal.

In this embodiment, if the state of the second CC signal parameter is the connected state and the state of the second CP signal parameter is the abnormal state, it indicates that the ac charging gun is normally connected to the vehicle-mounted charger, but the vehicle-mounted control end does not detect the CP signal, and the failure cause at this time may be that the charging gun is abnormal or the vehicle-mounted charger detects a functional failure of the CP signal.

step b23, if the state of the second CC signal parameter is a semi-connected state and the state of the second CP signal parameter is a connected state, determining that the second CC signal parameter is abnormal, and determining that the failure reason is that the charging gun microswitch is invalid.

In this embodiment, if the state of the second CC signal parameter is a half-connected state and the state of the second CP signal parameter is a connected state, it indicates that there is an abnormality in the connection between the ac charging gun and the vehicle-mounted charger, and at this time, the failure cause may be that the micro switch of the charging gun fails, that is, the state of the second CC signal parameter may be displayed as a half-connected state due to the failure of the micro switch of the charging gun. Specifically, whether the resistances of the CC and PE ends of the charging gun are normal can be detected by pressing the switch S3 of the charging gun and using a multimeter 20K omega grade: the natural state is 1.5K omega, the switch S3 is pressed to be 3.3K omega, and if the natural state is 1.5K omega, the charging gun microswitch is determined to be invalid.

In the embodiment, by detecting and analyzing the charging parameters in the normal charging state, the cause of the fault can be further quickly and accurately located by determining the specific abnormal parameters.

Further, based on the above-described first embodiment, a third embodiment of the charging failure detection method of the present invention is proposed.

In this embodiment, after the step of obtaining the charging parameter corresponding to the current operating state in step S20, the method further includes:

and c, if the charging parameters are normal, determining that the fault reason is the fault of the charging gun.

In the embodiment, when the vehicle charging fails, the current working state during the charging failure is determined, the charging parameters corresponding to the current working state are obtained, and if the charging parameters are normal, the failure reason is determined to be the charging gun failure. For example, if it is determined that the current working state of the fault is the normal charging state, all charging parameters corresponding to the normal charging state may be obtained in the vehicle CAN message, and the charging parameters corresponding to the normal charging state may include: the second CC signal parameter and the second CP signal parameter, the running mode of the whole vehicle, the charging request of the whole vehicle, the S2 switch, the input and output voltage and current of the vehicle-mounted charger and the awakening state of the vehicle-mounted charger, if all the charging parameters are normal, the method comprises the following steps: the second CC signal parameter and the second CP signal parameter are connected, the whole vehicle running mode is a charging mode, the S2 switch is closed, the input and output voltage and current of the vehicle-mounted charger are normal, the vehicle-mounted charger is in an awakening state, the fact that the vehicle-mounted charger runs normally indicates that the fault reason may be that the alternating current charging gun is in fault.

Further, before the step of determining the current operating state at the time of the charging failure in step S10, the method further includes:

and d, acquiring self-checking information of the charging gun, and determining the fault of the charging gun if the self-checking information is abnormal.

Further, if the self-checking information is normal, executing the following steps: and determining the current working state when the charging is failed.

In this embodiment, before the step of determining the current working state at the time of the charging failure, the charging gun performs self-checking, obtains self-checking information of the charging gun, and determines that the charging gun fails if the self-checking information is abnormal. Further, if the self-checking information is normal, executing the following steps: and determining the current working state when the charging is failed.

This embodiment is when initial state of charging, and whether the rifle that charges detects the trouble through the self-checking information detection of rifle earlier, can confirm the trouble before charging and the trouble of charging of time suggestion, has improved fault detection efficiency.

The present invention also provides a charging fault detection apparatus, which includes a memory, a processor, and a charging fault detection program stored on the memory and operable on the processor, and when executed by the processor, implements the steps of the charging fault detection method according to any one of the above embodiments.

The specific embodiment of the charging fault detection apparatus of the present invention is substantially the same as the embodiments of the charging fault detection method described above, and will not be described herein again.

The present invention also provides a computer-readable storage medium having stored thereon a charging fault detection program which, when executed by a processor, implements the steps of the charging fault detection method according to any one of the above embodiments.

The specific embodiment of the computer-readable storage medium of the present invention is substantially the same as the embodiments of the charging fault detection method described above, and is not described herein again.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A charging fault detection method is characterized by comprising the following steps:

determining the current working state when the charging is failed;

2. The charging fault detection method according to claim 1, wherein the step of obtaining the charging parameter corresponding to the current operating state, and if the charging parameter is abnormal, determining a fault cause according to the abnormal charging parameter includes:

3. The charging fault detection method according to claim 1, wherein the step of obtaining the charging parameter corresponding to the current operating state, and if the charging parameter is abnormal, determining a fault cause according to the abnormal charging parameter includes:

4. The charging fault detection method of claim 3, wherein the step of determining the cause of the fault according to the second CC signal parameter and the second CP signal parameter if the second CC signal parameter and the second CP signal parameter are abnormal comprises:

5. The charging fault detection method of claim 3, wherein the step of determining a fault cause according to the second CC signal parameter and the second CP signal parameter if the second CC signal parameter and the second CP signal parameter are abnormal further comprises:

6. The charging fault detection method of claim 3, wherein the step of determining the cause of the fault according to the second CC signal parameter and the second CP signal parameter if the second CC signal parameter and the second CP signal parameter are abnormal comprises:

7. The charging fault detection method according to claim 1, wherein after the step of obtaining the charging parameter corresponding to the current operating state, the method further comprises:

8. The charging fault detection method of claim 1, wherein said step of determining a current operating state at the time of the charging fault is preceded by the step of:

9. A charging failure detection apparatus, characterized in that the charging failure detection apparatus comprises a memory, a processor, and a charging failure detection program stored on the memory and executable on the processor, the charging failure detection program, when executed by the processor, implementing the steps of the charging failure detection method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that a charging failure detection program is stored thereon, which when executed by a processor implements the steps of the charging failure detection method according to any one of claims 1 to 8.