Electric vehicle and detection method, device and medium thereof, and electronic equipment

Abstract

The present invention discloses an electric vehicle and a detection method, device, medium, and electronic device thereof. The method comprises the following steps: when the electric vehicle is in a driving gear, confirm whether a first gun connection signal detected by an onboard charger of the electric vehicle is obtained; if the first gun connection signal is obtained, obtain a second gun connection signal detected by a battery manager of the electric vehicle, and determine the connection state of the charging gun and the electric vehicle according to the first gun connection signal and the second gun connection signal; if the first gun connection signal is not obtained, obtain a second gun connection signal detected by the battery manager, and determine the connection state of the charging gun and the electric vehicle according to the second gun connection signal. The detection method can avoid the risk of dragging the gun caused by a single detection failure and ensure the accuracy of the charging gun connection signal.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging, and in particular to an electric vehicle and a detection method, device, medium, and electronic equipment thereof. Background Art

[0002] There are generally two types of charging facilities for electric vehicles: AC charging piles and DC charging piles. For the gun connection signal of the AC charging pile, the only detection device is the on-board charger. After it fails, the connection status between the charging gun and the electric vehicle cannot be detected. At this time, if the electric vehicle is driven with the charging gun connected, it will cause the gun to be dragged, thereby damaging the vehicle and the charging pile, and even bring safety risks. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least some extent. To this end, one purpose of the present invention is to propose a detection method for electric vehicles to avoid the risk of gun dragging caused by a single detection failure and ensure the accuracy of the charging gun connection signal.

[0004] A second object of the present invention is to provide a computer-readable storage medium.

[0005] A third objective of the present invention is to provide an electronic device.

[0006] A fourth objective of the present invention is to provide a detection device for an electric vehicle.

[0007] A fifth objective of the present invention is to provide an electric vehicle.

[0008] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a detection method for an electric vehicle, comprising the following steps: when the electric vehicle is in a driving gear, confirming whether a first gun connection signal detected by an on-board charger of the electric vehicle is obtained; if the first gun connection signal is obtained, obtaining a second gun connection signal detected by a battery manager of the electric vehicle, and determining the connection status between the charging gun and the electric vehicle based on the first gun connection signal and the second gun connection signal; if the first gun connection signal is not obtained, obtaining a second gun connection signal detected by the battery manager, and determining the connection status between the charging gun and the electric vehicle based on the second gun connection signal.

[0009] In addition, the electric vehicle detection method of the embodiment of the present invention may also have the following additional technical features:

[0010] According to one embodiment of the present invention, determining the connection status of the charging gun and the electric vehicle according to the first gun connection signal and the second gun connection signal includes: judging whether the first gun connection signal and the second gun connection signal are consistent; if they are consistent, and the duration is greater than or equal to a first preset time, determining the connection status of the charging gun and the electric vehicle according to the first gun connection signal or the second gun connection signal, and giving a prompt; if they are inconsistent, and the duration reaches the second preset time, determining that the on-board charger is in a fault state, and determining the connection status of the charging gun and the electric vehicle according to the second gun connection signal, and giving a prompt.

[0011] According to one embodiment of the present invention, determining the connection status of the charging gun and the electric vehicle based on the second gun connection signal includes: if the second gun connection signal is a preset connection status signal, determining that the charging gun and the electric vehicle are in a connected state; if the second gun connection signal is not the preset connection status signal, determining that the charging gun and the electric vehicle are not in a connected state.

[0012] According to an embodiment of the present invention, the method further includes: when it is detected that the electric vehicle is switched from a driving gear to a non-driving gear, the battery manager stops detecting the connection status of the charging gun.

[0013] According to an embodiment of the present invention, the method further includes: when the on-board charger is in a fault state, recording a preset fault code indicating that the charging gun is inconsistent.

[0014] According to an embodiment of the present invention, the value of the first preset time is 0.3-0.8 s, and the value of the second preset time is 0.5-1.5 s.

[0015] To achieve the above-mentioned purpose, a second aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the above-mentioned electric vehicle detection method is implemented.

[0016] To achieve the above objectives, a third aspect of the present invention provides an electronic device, comprising a memory, a processor and a computer program stored in the memory, wherein when the computer program is executed by the processor, the above electric vehicle detection method is implemented.

[0017] To achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a detection device for an electric vehicle, comprising: an on-board charger, used to connect a charging gun of a charging pile, and used to detect the connection status of the charging gun to obtain a first gun connection signal; a battery manager, the battery manager is connected to the on-board charger and used to connect the charging gun, and the battery manager is used to: when the electric vehicle is in a driving gear, confirm whether the first gun connection signal is obtained; if the first gun connection signal is obtained, the connection status of the charging gun is detected to obtain a second gun connection signal, and the connection status of the charging gun and the electric vehicle is determined based on the first gun connection signal and the second gun connection signal; if the first gun connection signal is not obtained, the connection status of the charging gun is detected to obtain a second gun connection signal, and the connection status of the charging gun and the electric vehicle is determined based on the second gun connection signal.

[0018] To achieve the above-mentioned purpose, a fifth aspect of the present invention provides an electric vehicle, including the electronic device of the above-mentioned embodiment, or a detection device of the electric vehicle of the above-mentioned embodiment.

[0019] The electric vehicle and its detection method, device, medium, and electronic device of the embodiments of the present invention also detect the connection status of the charging gun through the battery manager, which can avoid the risk of dragging the gun caused by a single detection failure and ensure the accuracy of the charging gun connection signal.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a flow chart of a method for detecting an electric vehicle according to an embodiment of the invention;

[0022] Figure 2 is a schematic diagram of an electric vehicle charging connection according to an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of detection and transmission of a charging gun connection signal according to an embodiment of the present invention;

[0024] Figure 4 is a flow chart of a method for detecting an electric vehicle according to a specific embodiment of the present invention;

[0025] Figure 5 is a structural block diagram of an electronic device according to an embodiment of the present invention;

[0026] Figure 6 is a structural block diagram of an electric vehicle according to an embodiment of the present invention;

[0027] Figure 7 is a structural block diagram of an electric vehicle according to another embodiment of the present invention. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following describes an electric vehicle and a detection method, device, medium, and electronic device thereof according to an embodiment of the present invention with reference to the accompanying drawings.

[0030] Figure 1 The figure is a flow chart of a method for detecting an electric vehicle according to an embodiment of the present invention.

[0031] like Figure 1 As shown, the detection method comprises the following steps:

[0032] S1, when the electric vehicle is in a driving gear, confirm whether a first gun connection signal detected by an on-board charger of the electric vehicle is obtained.

[0033] Specifically, Figure 2 As shown, when the charging port of the electric vehicle is connected to the charging gun of the charging pile for charging, the charging pile draws power from the power grid and transmits the power of the power grid to the electric vehicle. The charging pile may be an AC charging pile, and the charging gun is a charging gun connected to the AC charging pile.

[0034] S2, if the first gun connection signal is obtained, then obtain the second gun connection signal detected by the battery manager of the electric vehicle, and determine the connection status between the charging gun and the electric vehicle according to the first gun connection signal and the second gun connection signal.

[0035] S3: If the first gun connection signal is not obtained, the connection status of the charging gun is detected to obtain a second gun connection signal, and the connection status of the charging gun and the electric vehicle is determined according to the second gun connection signal.

[0036] In this embodiment, if the first gun connection signal is not obtained, it means that the communication between the vehicle charger and the battery manager has timed out. The reason may be Figure 3 If the fuse F1 in the on-board charger is blown, or the on-board charger itself (such as hardware, communication chip) fails, the on-board charger is determined to be in a faulty state.

[0037] Specifically, Figure 3As shown, the on-board charger is provided with a first detection module to identify the charging gun connection signal of the AC charging pile and send it to the battery manager via a CAN (Controller Area Network) message. The battery manager may be provided with a second detection module to identify the charging gun connection signal of the AC charging pile when the on-board charger fails or its low-voltage fuse burns out.

[0038] Among them, the charging gun connection signal is a resistance signal. The connection of the charging gun is equivalent to connecting a resistor Rcc in series with the AC charging port of the vehicle, which is called the CC resistor (the setting of the charging power and its corresponding CC resistor value is shown in Table 1 below). After the CC resistor is connected in series, the on-board charger converts the low-voltage 12V power supply into 5V through the internal circuit, such as Figure 3 As shown. When the charging gun is connected, the on-board charger recognizes the change in voltage and calculates the resistance value to identify the connection status of the charging gun. The connection of the charging gun is equivalent to the CC resistor being connected to the first detection module, and the first detection module can detect the voltage signal; if the charging gun is not connected, it is equivalent to the CC resistor being disconnected from the first detection module, and the first detection module cannot detect the voltage signal. The detection principle of the second detection module in the battery manager for the connection status of the charging gun is the same as that of the first detection module, and the connection status of the charging gun is also detected by detecting the voltage signal.

[0039] Table 1

[0040] Charging power of charging pile CC resistance 1.6kW 1500Ω 3.3kW 680Ω 6.6kW 220Ω

[0041] Therefore, through the dual detection of the charging gun connection status by the on-board charger and the battery manager, the detection reliability of the charging gun connection status can be improved, thereby better avoiding the occurrence of the gun dragging phenomenon and improving the safety of charging.

[0042] In one embodiment of the present invention, determining the connection status of the charging gun and the electric vehicle according to the first gun connection signal and the second gun connection signal may include: judging whether the first gun connection signal and the second gun connection signal are consistent; if they are consistent, and the duration is greater than or equal to the first preset time, then determining that the vehicle charger is in a non-fault state, and determining the connection status of the charging gun and the electric vehicle according to the first gun connection signal or the second gun connection signal, and giving a prompt; if they are inconsistent, and the duration reaches the second preset time, then determining that the vehicle charger is in a fault state, and determining the connection status of the charging gun and the electric vehicle according to the second gun connection signal, and giving a prompt.

[0043] The first preset time is 0.3-0.8s, for example, 0.5s; the second preset time is 0.5-1.5s, for example, 1s. The above prompt can be a voice prompt, an audible and visual alarm prompt, or a text prompt displayed on the vehicle terminal.

[0044] In this embodiment, when determining the connection status between the charging gun and the electric vehicle according to the second gun connection signal, if the second gun connection signal is a preset connection status signal, it is determined that the charging gun and the electric vehicle are in a connected state; if the second gun connection signal is not a preset connection status signal, it is determined that the charging gun and the electric vehicle are not in a connected state.

[0045] Accordingly, when determining the connection status between the charging gun and the electric vehicle according to the first gun connection signal, if the first gun connection signal is a preset connection status signal, it is determined that the charging gun and the electric vehicle are in a connected state; if the first gun connection signal is not a preset connection status signal, it is determined that the charging gun and the electric vehicle are not in a connected state.

[0046] The preset connection status signal may be a preset specific code, which indicates that the charging gun and the electric vehicle are in a connected state.

[0047] As an example, see Figure 3 When the second gun connection signal is used to detect the connection status of the charging gun, the battery manager can integrate the DC gun connection signal and send it to the vehicle controller, gear controller and instrument through CAN messages. After the vehicle controller receives the "gun connection signal" integrated by the battery manager, it turns off the vehicle's OK light and the vehicle is not allowed to drive; after the gear controller receives the "gun connection signal", the vehicle is not allowed to shift gears; after the instrument receives the "gun connection signal", the gun connection indicator light is displayed on the vehicle display to remind the user that the vehicle is now connected to the charging gun. In this way, the risk of dragging the gun caused by the failure of a single detection of the on-board charger can be avoided, and the accuracy of the charging gun connection signal can be ensured.

[0048] In one embodiment of the present invention, Figure 4 As shown, the detection method may further include: when it is detected that the electric vehicle switches from a driving gear to a non-driving gear, the battery manager stops detecting the connection status of the charging gun.

[0049] Specifically, the electric vehicle switches from the driving gear to the non-driving gear, which means that the electric vehicle is temporarily not started and is still in a stationary state, and there is no towing gun situation. Therefore, the battery manager can stop detecting the connection status of the charging gun to reduce energy consumption.

[0050] In one embodiment of the present invention, Figure 4As shown, the detection method may further include: when the on-board charger is in a fault state, recording a preset fault code indicating that the charging gun is inconsistent, so as to facilitate subsequent maintenance of the on-board charger.

[0051] For ease of understanding, the following Figure 3 , Figure 4 The detection method of the electric vehicle according to the embodiment of the present invention is described as follows:

[0052] See also Figure 3 If the on-board charger fails or its low-voltage 12V power supply fuse F1 burns out, the first detection module cannot detect the CC resistance. If there is no second detection module, even if the charging gun is plugged in, it cannot be detected. Therefore, after the user starts the vehicle, he can directly shift to D gear and drive the electric vehicle, causing the charging gun to be dragged, and the charging equipment and the electric vehicle to be damaged, and even the risk of electric shock due to contact with damaged exposed high-voltage wires. To this end, the present invention adds a signal detection module, namely the second detection module, to the battery manager, and directly connects it to the charging port of the electric vehicle to enable the battery manager to detect the charging gun.

[0053] When the on-board charger is in a faulty state, the access to the second detection module of the battery manager can quickly detect the connection of the charging gun, and send the charging gun connection signal to the vehicle controller and the gear controller. The vehicle cannot drive, and the instrument prompts the charging gun connection icon to remind the user. The user can drive the vehicle normally after unplugging the charging gun. In addition, the access to the detection circuit of the battery manager will not interfere with the normal detection of the CC resistance of the on-board charger, ensuring the normal operation of the on-board charger.

[0054] See also Figure 4 If the vehicle is in the non-driving gear, i.e. OFF gear, the electric vehicle cannot be driven. In this condition, the gun-pulling failure will not occur, and the BMC (Battery Management Controller) does not need to detect the gun signal. Once the vehicle is in the driving gear, i.e. ON gear, the electric vehicle has the ability to drive, and the risk of gun-pulling may occur.

[0055] For this purpose, see Figure 4 In the driving gear (ON gear), the battery manager detects whether the "charging gun connection signal" message (0x24A) of the on-board charger is collected in the CAN network. If it cannot be collected for a certain period of time, such as 1 second, it means that the on-board charger is in a faulty state; if it is collected and is inconsistent with the charging gun signal detected by the battery manager itself, and lasts for a first preset time, such as 1 second, it can also indicate that the on-board charger is faulty. At this time, a preset fault code indicating the inconsistent charging gun can be recorded. When confirming that the on-board charger is in a faulty state, the battery manager can control Figure 3The transformer outputs 5V power and injects it into the second detection module of the CC resistor to detect the actual status of the charging gun connection, and sends the actual charging gun connection status to the vehicle controller and gear controller to ensure that the vehicle does not have a towing gun failure. During the entire detection process, the battery manager confirms in real time whether the vehicle is powered down to the non-driving gear (OFF gear). If the vehicle enters the non-driving gear (OFF gear), the charging gun connection detection will no longer be performed and the sleep process will be entered.

[0056] If the signal is collected and consistent with the charging gun signal detected by the battery manager itself, and lasts for a second preset time such as 0.5s, the 5V power supply inside the battery manager will not be injected into the detection circuit of the CC resistor, and the battery manager will continue to send the "charging gun connected" signal of the on-board charger to the vehicle controller and the gear controller to receive it, ensuring that the vehicle does not have a towing gun failure.

[0057] In summary, the detection method for electric vehicles in the embodiment of the present invention also detects the connection status of the charging gun through the battery manager, which can avoid the risk of gun dragging caused by a single detection failure and ensure the accuracy of the charging gun connection signal.

[0058] The present invention also provides a computer-readable storage medium.

[0059] In this embodiment, a computer program is stored on a computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned electric vehicle detection method is implemented.

[0060] The computer-readable storage medium of an embodiment of the present invention, when the computer program corresponding to the detection method of the electric vehicle of the above embodiment is stored thereon and is executed by a processor, can also detect the connection status of the charging gun through the battery manager, thereby avoiding the risk of dragging the gun caused by the failure of a single detection and ensuring the accuracy of the charging gun connection signal.

[0061] Figure 5 It is a structural block diagram of an electronic device according to an embodiment of the present invention.

[0062] like Figure 5 As shown, the electronic device 100 includes a memory 10 , a processor 20 , and a computer program 30 stored on the memory 10 .

[0063] In this embodiment, when the computer program 30 is executed by a processor, the above-mentioned electric vehicle detection method is implemented.

[0064] The electronic device of an embodiment of the present invention, when the computer program corresponding to the electric vehicle detection method of the above embodiment stored in its memory is executed by the processor, can also detect the connection status of the charging gun through the battery manager, thereby avoiding the risk of dragging the gun caused by a single detection failure and ensuring the accuracy of the charging gun connection signal.

[0065] The invention also provides a detection device for an electric vehicle.

[0066] See also Figure 3 The detection device 200 for an electric vehicle includes: an on-board charger 210 and a battery manager 220. The on-board charger 210 is connected to the charging port of the electric vehicle, and the on-board charger 210 is used to detect the connection status of the charging gun and obtain a first gun connection signal; the battery manager 220 is connected to the on-board charger 210 and the charging port respectively.

[0067] In this embodiment, the battery manager 220 is used to confirm whether the first gun connection signal is obtained when the electric vehicle is in the driving gear; if the first gun connection signal is obtained, the connection status of the charging gun is detected to obtain the second gun connection signal, and the connection status of the charging gun and the electric vehicle is determined according to the first gun connection signal and the second gun connection signal; if the first gun connection signal is not obtained, the connection status of the charging gun is detected to obtain the second gun connection signal, and the connection status of the charging gun and the electric vehicle is determined according to the second gun connection signal.

[0068] It should be noted that, for other specific implementations of the electric vehicle detection device according to the embodiment of the present invention, reference may be made to the specific implementations of the electric vehicle detection method according to the above-mentioned embodiment of the present invention.

[0069] The detection device for an electric vehicle according to an embodiment of the present invention also detects the connection status of the charging gun through a battery manager, thereby avoiding the risk of gun dragging caused by a single detection failure and ensuring the accuracy of the charging gun connection signal.

[0070] Furthermore, the present invention can also provide an electric vehicle.

[0071] In one embodiment of the present invention, Figure 6 As shown, an electric vehicle 300 includes the electronic device 100 of the above-described embodiment.

[0072] In another embodiment of the present invention, Figure 7 As shown, the electric vehicle 300 includes the electric vehicle detection device 200 of the above embodiment.

[0073] The electric vehicle of the embodiment of the present invention can detect the connection status of the charging gun through the above-mentioned electronic device or the electric vehicle detection device, and can also detect the connection status of the charging gun through the battery manager, thereby avoiding the risk of dragging the gun caused by a single detection failure and ensuring the accuracy of the charging gun connection signal.

[0074] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0075] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0077] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0079] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0081] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for detecting an electric vehicle, characterized in that: The following steps are involved: When the electric vehicle is in a driving gear, confirming whether a first gun connection signal detected by an on-board charger of the electric vehicle is obtained; If the first gun connection signal is obtained, a second gun connection signal detected by the battery manager of the electric vehicle is obtained, and a connection state between the charging gun and the electric vehicle is determined according to the first gun connection signal and the second gun connection signal; If the first gun connection signal is not obtained, obtaining a second gun connection signal detected by the battery manager, and determining the connection state between the charging gun and the electric vehicle according to the second gun connection signal; The determining the connection state between the charging gun and the electric vehicle according to the first gun connection signal and the second gun connection signal includes: Determining whether the first gun connection signal is consistent with the second gun connection signal; If they are consistent, and the duration is greater than or equal to the first preset time, the connection status between the charging gun and the electric vehicle is determined according to the first gun connection signal or the second gun connection signal, and a prompt is given; If they are inconsistent and the duration reaches a second preset time, it is determined that the on-board charger is in a fault state, and the connection state between the charging gun and the electric vehicle is determined according to the second gun connection signal, and a prompt is given; When it is confirmed that the on-board charger is in a fault state, the actual state of the charging gun connection is detected, and the actual charging gun connection state is sent to the vehicle controller and the gear controller for receiving.

2. The electric vehicle detection method according to claim 1, characterized in that: The step of determining the connection state between the charging gun and the electric vehicle according to the second gun connection signal includes: If the second gun connection signal is a preset connection state signal, it is determined that the charging gun is in a connection state with the electric vehicle; If the second gun connection signal is not the preset connection state signal, it is determined that the charging gun and the electric vehicle are not in a connection state.

3. The electric vehicle detection method according to claim 1, characterized in that: The method further comprises: When it is detected that the electric vehicle is switched from a driving gear to a non-driving gear, the battery manager stops detecting the connection status of the charging gun.

4. The electric vehicle detection method according to claim 1, characterized in that: The method further comprises: When the on-board charger is in a fault state, a preset fault code indicating that the charging gun is inconsistent is recorded.

5. The electric vehicle detection method according to claim 1, characterized in that: The first preset time is between 0.3 and 0.8 seconds, and the second preset time is between 0.5 and 1.5 seconds.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the electric vehicle detection method according to any one of claims 1 to 5 is implemented.

7. An electronic device comprising a memory, a processor and a computer program stored in the memory, characterized in that: When the computer program is executed by the processor, the electric vehicle detection method according to any one of claims 1 to 5 is implemented.

8. A detection device for an electric vehicle, characterized in that: include: The on-board charger is used to connect the charging gun of the charging pile, and is used to detect the connection status of the charging gun and obtain a first gun connection signal; A battery manager, the battery manager is connected to the vehicle charger and used to connect to the charging gun, and the battery manager is used to: When the electric vehicle is in a driving gear, confirming whether the first gun connection signal is obtained; If the first gun connection signal is obtained, the connection status of the charging gun is detected to obtain a second gun connection signal, and the connection status between the charging gun and the electric vehicle is determined according to the first gun connection signal and the second gun connection signal, and a prompt is given; If the first gun connection signal is not obtained, the connection status of the charging gun is detected to obtain a second gun connection signal, and the connection status between the charging gun and the electric vehicle is determined according to the second gun connection signal, and a prompt is given; The determining the connection state between the charging gun and the electric vehicle according to the first gun connection signal and the second gun connection signal includes: Determining whether the first gun connection signal is consistent with the second gun connection signal; If they are consistent, and the duration is greater than or equal to the first preset time, the connection status between the charging gun and the electric vehicle is determined according to the first gun connection signal or the second gun connection signal, and a prompt is given; If they are inconsistent and the duration reaches a second preset time, it is determined that the on-board charger is in a fault state, and the connection state between the charging gun and the electric vehicle is determined according to the second gun connection signal, and a prompt is given; When it is confirmed that the on-board charger is in a fault state, the actual state of the charging gun connection is detected, and the actual charging gun connection state is sent to the vehicle controller and the gear controller for receiving.

9. An electric vehicle, characterized in that: It comprises the electronic device as claimed in claim 7, or the detection device for an electric vehicle as claimed in claim 8.

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