Charging gun connection state detection method and apparatus, and vehicle

Abstract

A charging gun connection state detection method and apparatus (20), applied to a vehicle. When a vehicle is connected to a charging gun of an alternating current charging pile, a connection state between the charging gun and the vehicle is determined on the basis of the parameter value of a first parameter and the parameter value of a second parameter of a charging interface circuit (10).

Description

Charging gun connection status detection method, device and vehicle

[0001] This application claims priority to Chinese patent application No. 202410206975.3, filed on February 23, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of charging guns, and in particular to a method and device for detecting the connection status of a charging gun, and a vehicle. Background Art

[0003] A charging gun is a component that can be used to charge new energy electric vehicles. With the rise of new energy vehicles, the application of charging guns has become more and more extensive. Charging piles and charging guns are set up in cities or towns to facilitate people to charge new energy electric vehicles and ensure that new energy electric vehicles have sufficient power, thereby ensuring the normal use of new energy electric vehicles.

[0004] Summary of the Invention

[0005] The present disclosure provides a method, device, and vehicle for detecting the connection status of a charging gun.

[0006] In a first aspect, the present disclosure provides a method for detecting the connection status of a charging gun, the method comprising: when a vehicle is connected to a charging gun of an AC charging pile, determining the connection status of the charging gun and the vehicle according to the parameter value of a first parameter and the parameter value of a second parameter of a charging interface circuit.

[0007] For example, the first parameter and the second parameter are circuit parameters such as voltage and resistance obtained when the charging gun is connected to the vehicle. The parameter value of the first parameter or the parameter value of the second parameter can represent the state of the charging interface circuit, and then represent the connection state between the charging gun and the vehicle.

[0008] If the connection status represented by the parameter value of the first parameter is consistent with the connection status represented by the parameter value of the second parameter, it is determined that the connection status between the charging gun and the vehicle is a consistent connection status; if the connection status represented by the parameter value of the first parameter is inconsistent with the connection status represented by the parameter value of the second parameter, it indicates that an abnormality has occurred in the connection status detection between the charging gun and the vehicle.

[0009] For example, if the connection status represented by the parameter value of the first charging parameter is that the charging gun is not connected, and the connection status represented by the parameter value of the second parameter is that the charging gun is connected or the charging gun is not fully connected, and the actual connection status at this time is that the charging gun is not fully connected, if only the connection status represented by the parameter value of the first parameter is used as the determined connection status between the charging gun and the vehicle, false detection will occur. If the user starts the vehicle at this time, it will cause a serious accident in which the vehicle starts with the gun dragging. If the connection status is judged as an abnormal charging gun connection based on the parameter value of the first parameter and the parameter value of the second parameter, the user will be reminded in time to avoid a serious accident in which the vehicle starts with the gun dragging.

[0010] The connection status between the charging gun and the vehicle is determined based on the parameter value of the first parameter and the parameter value of the second parameter of the charging interface circuit. The connection status represented by the parameter value of the first parameter and the parameter value of the second parameter can be verified with each other, and certain abnormal situations can be detected, thereby improving the detection accuracy of the connection status of the charging gun and avoiding accidents or poor user experience caused by incorrect detection of the connection status of the charging gun.

[0011] In some embodiments, the second parameter includes a CP voltage.

[0012] In some embodiments, the connection status between the charging gun and the vehicle includes one or more of: charging gun connected, charging gun not connected, charging gun not fully connected, and charging gun connection abnormality.

[0013] In some embodiments, if it is determined that the connection status between the charging gun and the vehicle is abnormal, the power output of the vehicle is limited.

[0014] In some embodiments, determining the connection status between the charging gun and the vehicle based on the parameter value of the first parameter and the parameter value of the second parameter of the charging interface circuit includes at least one of the following:

[0015] If the parameter value of the first parameter is within the first target range, the connection status is that the charging gun is connected;

[0016] If the parameter value of the first parameter is within the second target range, the connection status is that the charging gun is not fully connected;

[0017] If the parameter value of the first parameter is within the third target range, the connection status is that the charging gun is not connected;

[0018] If the parameter value of the first parameter is within the fourth target range and the parameter value of the second parameter is within the fifth target range, the connection status is that the charging gun connection is abnormal;

[0019] If the parameter value of the first parameter is within the first target range and the parameter value of the second parameter is within the fifth target range, the connection status is charging gun connected;

[0020] If the parameter value of the first parameter is within the second target range and the parameter value of the second parameter is within the fifth target range, the connection status is that the charging gun is not fully connected; or

[0021] If the parameter value of the first parameter is within the third target range and the parameter value of the second parameter is within the sixth target range, the connection status is that the charging gun is not connected.

[0022] In one embodiment, the first target range includes a range of resistance values ​​of an RC resistor of the charging interface circuit; the second target range includes a range of the sum of the resistance values ​​of the RC resistor and the resistance value of an R4 resistor of the charging interface circuit, where the RC resistor is a detection resistor connected in series with a first switch of the charging interface circuit, and the R4 resistor is a detection resistor connected in parallel with the first switch.

[0023] In some embodiments, the first parameter includes CC resistance to ground.

[0024] In some embodiments, after determining the connection status between the charging gun and the vehicle, the connection status information of the charging gun is sent. Here, the connection status information is information sent to the user.

[0025] In some embodiments, sending the connection status information of the charging gun includes at least one of the following: controlling the vehicle terminal to send a first prompt message, wherein the first prompt message is used to prompt the user of the connection status of the charging gun; or sending the connection status information of the charging gun to the mobile terminal so that the mobile terminal reminds and notifies the user of the connection status of the charging gun.

[0026] In a second aspect, the present disclosure provides a charging gun connection status detection device, which includes a processor connected to a memory, the memory being used to store a computer program, and the processor calling the computer program to execute the method described in the first aspect.

[0027] In a third aspect, the present disclosure provides a charging system, which includes a charging interface circuit and the charging gun connection status detection device described in the second aspect, and the charging gun connection status detection device is connected to the charging interface circuit.

[0028] In a fourth aspect, the present disclosure provides a vehicle, comprising at least one of the charging gun connection status detection device described in the second aspect, or the charging system described in the third aspect.

[0029] In a fifth aspect, the present disclosure provides a vehicle power supply device, comprising at least one of the charging gun connection status detection device described in the second aspect, or the charging system described in the third aspect.

[0030] In a sixth aspect, the present disclosure provides a computer storage medium storing a computer program, wherein when the computer program is executed by a processor, the method described in the first aspect is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] FIG1 is a schematic diagram of a process of a method for detecting a charging gun connection status according to some embodiments;

[0033] FIG2 is a schematic diagram of a charging interface circuit according to some embodiments;

[0034] FIG3 is another schematic diagram of the process of a method for detecting a charging gun connection status according to some embodiments;

[0035] FIG4 is another schematic diagram of the process of the method for detecting the connection status of a charging gun according to some embodiments;

[0036] FIG5 is a schematic diagram of a charging gun connection status detection device according to some embodiments;

[0037] FIG6 is a schematic diagram of a charging system according to some embodiments.

[0038] Figure numerals: vehicle power supply equipment 200; charging gun connection status detection device 20; vehicle interface 30; charging system 40; first switch 11; R4 resistor 12; RC resistor 13; vehicle power supply equipment ground 14; vehicle ground 15; detection point A16; detection point B17; signal line 18; processor 21; memory 22; communication component 23. DETAILED DESCRIPTION

[0039] The embodiments of the present disclosure are described in detail below. Examples of the embodiments 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. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0040] The terms "first," "second," "third," "fourth," and the like (if any) in the specification and claims of the present disclosure and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] In the related art, when a vehicle is connected to the charging gun of an AC charging pile, whether the charging gun is connected is determined by detecting a certain parameter state of the charging interface circuit, but the abnormal state of the charging gun connection detection is not taken into account. In some cases, for example, there is a fault in the charging interface circuit connecting the charging pile and the vehicle, resulting in inaccurate detection of the connection state between the charging gun and the vehicle. In serious cases, for example, the charging gun is in an incompletely connected state or a connected state, and the connection state between the charging gun and the vehicle is mistakenly detected as being disconnected, which may lead to serious accidents such as starting with the gun dragging.

[0042] To solve the above problems, in some embodiments of the present disclosure, a comprehensive judgment of the connection status of the charging gun is made through the parameter values ​​of multiple parameters of the charging interface circuit, such as the voltage value of the CP voltage and the resistance value of the CC resistance to ground. This not only improves the detection accuracy of the connection status of the charging gun, but also identifies abnormal states of the charging gun connection detection.

[0043] Some embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0044] FIG1 is a schematic diagram of a method for detecting the connection status of a charging gun according to some embodiments. Referring to FIG1 , the method can be applied to a charging gun connection status detection device to determine the connection status between the charging gun and the vehicle. The method includes the following steps:

[0045] Step S101: When a vehicle is connected to a charging gun of an AC charging pile, a parameter value of a first parameter and a parameter value of a second parameter of a charging interface circuit are obtained.

[0046] The charging interface circuit includes the interface circuit of the vehicle power supply equipment, or the interface circuit of the vehicle, or the interface circuit of the vehicle power supply equipment and the interface circuit of the vehicle; the interface circuit of the vehicle power supply equipment and the interface circuit of the vehicle are connected to the vehicle interface through a charging gun, so that the vehicle power supply equipment is electrically connected to the vehicle.

[0047] In some embodiments, the vehicle power supply equipment includes a charging station.

[0048] The first parameter and the second parameter are parameters of the charging interface circuit obtained by the vehicle after the charging gun is connected to the vehicle. For example, they can be circuit parameters such as voltage and resistance. The parameter value of the first parameter or the parameter value of the second parameter can represent the state of the charging interface circuit, and then represent the connection state between the charging gun and the vehicle.

[0049] Step S102: determining the connection status between the charging gun and the vehicle according to the parameter value of the first parameter and the parameter value of the second parameter of the charging interface circuit.

[0050] For example, the parameter value of the first parameter can represent the connection status between the charging gun and the vehicle as charging gun connected and charging gun not connected; the parameter value of the second parameter can represent the connection status between the charging gun and the vehicle as charging gun connected, charging gun not fully connected, and charging gun not connected.

[0051] If the connection status between the charging gun and the vehicle represented by the parameter value of the first parameter is consistent with the connection status represented by the parameter value of the second parameter, it can be determined that the connection status between the charging gun and the vehicle is a consistent connection status; if the connection status between the charging gun and the vehicle represented by the parameter value of the first parameter is inconsistent with the connection status represented by the parameter value of the second parameter, the connection status detection between the charging gun and the vehicle may be abnormal.

[0052] For example, if the connection status represented by the parameter value of the first charging parameter is that the charging gun is not connected, and the connection status represented by the parameter value of the second parameter is that the charging gun is connected or the charging gun is not fully connected, and the actual connection status at this time is that the charging gun is not fully connected, if only the connection status represented by the parameter value of the first parameter is used as the determined connection status between the charging gun and the vehicle, false detection will occur. If the user starts the vehicle at this time, it will cause a serious accident in which the vehicle starts with the gun dragging. If the connection status is judged as an abnormal charging gun connection based on the parameter value of the first parameter and the parameter value of the second parameter, the user will be reminded in time to avoid a serious accident in which the vehicle starts with the gun dragging.

[0053] The connection status of the charging gun and the vehicle is determined based on the parameter value of the first parameter and the parameter value of the second parameter of the charging interface circuit. The connection status of the charging gun represented by the parameter value of the first parameter and the parameter value of the second parameter can be verified with each other, and certain abnormal situations can be detected, thereby improving the detection accuracy of the connection status and avoiding accidents or poor user experience caused by incorrect detection of the connection status of the charging gun.

[0054] In some embodiments, the first parameter includes CC resistance to ground.

[0055] For example, in related technologies, a connection confirmation (CC) function can be implemented through a charging interface circuit to electronically or mechanically reflect the connection status between the charging gun and the vehicle. The charging interface circuit may include one or more resistors, and the CC-to-ground resistance is the equivalent resistance of a set point in the charging interface circuit to ground. The resistance value of the CC-to-ground resistance can indicate the connection status between the charging gun and the vehicle.

[0056] In some embodiments, the second parameter includes a CP voltage.

[0057] For example, in related technologies, a control pilot (CP) function can be implemented through a charging interface circuit to monitor the interaction between the vehicle and the vehicle power supply device. This function typically uses a pulse width modulation (PWM) signal with alternating amplitudes. The CP voltage can be the voltage of the pulse width modulation signal, and the CP voltage value can indicate the connection status between the charging gun and the vehicle.

[0058] In some embodiments, if it is determined that the connection status between the charging gun and the vehicle is abnormal, the power output of the vehicle is limited.

[0059] When the detection of the connection status between the charging gun and the vehicle is abnormal, for example, the connection status of the charging gun represented by the parameter value of the first parameter is inconsistent with the connection status represented by the parameter value of the second parameter, the connection status represented by the parameter value of the first parameter or the parameter value of the second parameter is that the charging gun is not connected, and the actual connection status is that the charging gun is connected. By limiting the power output of the vehicle, direct starting of the vehicle is avoided, causing the gun to be dragged to start.

[0060] In some embodiments, the connection status between the charging gun and the vehicle includes one or more of: charging gun connected, charging gun not connected, charging gun not fully connected, and charging gun connection abnormality.

[0061] In some embodiments, determining the connection status between the charging gun and the vehicle based on the parameter values ​​of the first parameter and the second parameter of the charging interface circuit includes one or more of the following conditions:

[0062] If the parameter value of the first parameter is within the first target range, the connection status is that the charging gun is connected;

[0063] If the parameter value of the first parameter is within the second target range, the connection status is that the charging gun is not fully connected;

[0064] If the parameter value of the first parameter is within the third target range, the connection status is that the charging gun is not connected;

[0065] If the parameter value of the first parameter is within the fourth target range and the parameter value of the second parameter is within the fifth target range, the connection status is that the charging gun connection is abnormal;

[0066] If the parameter value of the first parameter is within the first target range and the parameter value of the second parameter is within the fifth target range, the connection status is charging gun connected;

[0067] If the parameter value of the first parameter is within the second target range and the parameter value of the second parameter is within the fifth target range, the connection status is that the charging gun is not fully connected;

[0068] If the parameter value of the first parameter is within the third target range and the parameter value of the second parameter is within the sixth target range, the connection status is that the charging gun is not connected.

[0069] In some embodiments, the first target range includes the range of resistance values ​​of an RC (Resistor Capacitor) resistor of the charging interface circuit; the second target range includes the range of the sum of the resistance values ​​of the RC resistor and the resistance value of an R4 resistor of the charging interface circuit, where the RC resistor is a detection resistor connected in series with a first switch of the charging interface circuit, and the R4 resistor is a detection resistor connected in parallel with the first switch.

[0070] For example, Figure 2 is a schematic diagram of a charging interface circuit according to some embodiments. Referring to Figure 2, the charging interface circuit includes a first switch 11, an RC resistor 13 and an R4 resistor 12. The RC resistor 13 is connected in series with the first switch 11, and the R4 resistor 12 is connected in parallel with the first switch 11. The end of the first switch 11 away from the RC resistor 13 is connected to the vehicle power supply equipment ground 14. After the charging gun is connected to the vehicle through the vehicle interface 30, the vehicle power supply equipment ground 14 is electrically connected to the vehicle ground 15; the end of the RC resistor 13 away from the first switch 11 is connected to the charging gun connection status detection device 20, and the detection point A16 is set between the RC resistor 13 and the charging gun connection status detection device 20. The charging gun connection status detection device 20 is configured to detect the resistance value of the ground resistance at the detection point A16; the first switch 11 is configured to close after the charging gun is fully connected to the vehicle.

[0071] The ground resistance of detection point A16 is used as the first parameter. When the charging gun is not connected to the vehicle interface 30, the vehicle power supply equipment ground 14 and the vehicle ground 15 are in a disconnected state, and the resistance value of the ground resistance detected by detection point A16 is infinite; when the charging gun is not fully connected, the vehicle power supply equipment ground 14 and the vehicle ground 15 are in a connected state, the first switch 11 is in an open state, and the resistance value of the ground resistance detected by detection point A16 is the sum of the resistance value of RC resistor 13 and the resistance value of R4 resistor 12; when the charging gun is fully connected, the vehicle power supply equipment ground 14 and the vehicle ground 15 are in a connected state, the first switch 11 is in a closed state, and the resistance value of the ground resistance detected by detection point A16 is the resistance value of RC resistor 13.

[0072] Conversely, the parameter value of the first parameter can also represent the connection status of the charging gun. For example, if the resistance value of the ground resistance detected by the detection point A16 is infinite, it represents the connection status of the charging gun as the charging gun is not connected; if the resistance value of the ground resistance detected by the detection point A16 is the sum of the resistance value of the RC resistor 13 and the resistance value of the R4 resistor 12, it represents the connection status of the charging gun as the charging gun is not fully connected; if the resistance value of the ground resistance detected by the detection point A16 is the resistance value of the RC resistor 13, it represents the connection status of the charging gun as the charging gun is connected.

[0073] In some embodiments, the charging interface circuit further includes a signal line 18. The vehicle power supply device 200 is connected to the charging gun connection status detection device 20 via signal line 18. A detection point B17 is located on signal line 18. When the charging gun is connected to the vehicle via the vehicle interface 30, signal line 18 is connected. When the charging gun is disconnected from the vehicle, signal line 18 is disconnected. The vehicle power supply device 200 is configured to output a CP voltage signal, which is transmitted via signal line 18. The charging gun connection status detection device 20 is further configured to detect the voltage value of the CP voltage signal at detection point B17.

[0074] The voltage detected at the detection point B17 is used as the second parameter. When the charging gun is connected to the vehicle through the vehicle interface 30, including the charging gun being connected and the charging gun being not fully connected, the signal line 18 connects the vehicle power supply equipment 200 and the charging gun connection status detection device 20. The CP voltage signal can be transmitted to the charging gun connection status detection device 20 via the signal line 18. The charging gun connection status detection device 20 can detect the voltage value of the CP voltage signal at the detection point B17. The voltage value detected at the detection point B17 is within the fifth target range.

[0075] When the charging gun is not connected, the signal line 18 is in a disconnected state, that is, the vehicle power supply equipment 200 and the charging gun connection status detection device 20 are in a disconnected state, and the CP voltage signal cannot be transmitted to the charging gun connection status detection device 20 via the signal line 18. The charging gun connection status detection device 20 cannot detect the voltage value of the CP voltage signal at the detection point B17. The voltage value detected at the detection point B17 is within the sixth target range.

[0076] Conversely, the parameter value of the second parameter can also represent the connection status of the charging gun. For example, if the voltage value detected at the detection point B17 is within the fifth target range, the connection status of the charging gun is represented as connected or not fully connected; if the voltage value detected at the detection point B17 is within the sixth target range, the connection status is represented as not connected.

[0077] FIG3 is a schematic diagram of a flow chart of a method for detecting a connection status of a charging gun according to some embodiments; FIG4 is another schematic diagram of a flow chart of a method for detecting a connection status of a charging gun according to some embodiments; Referring to FIG3 and FIG4 , determining the connection status between the charging gun and the vehicle based on the parameter values ​​of the first parameter and the second parameter of the charging interface circuit includes:

[0078] In some embodiments, as shown in Figure 2, the first parameter is the CC resistance to ground, and the resistance to ground detected by the charging gun connection status detection device 20 through the detection point A16 can be used as the first parameter; the second parameter is the CP voltage, and the voltage detected by the charging gun connection status detection device 20 through the detection point B17 can be used as the second parameter.

[0079] The resistance value of CC to ground can indicate the connection status of the charging cable as follows:

[0080] The resistance value of the CC-to-ground resistor is within the first target range, which indicates that the connection status is that the charging gun is connected.

[0081] The resistance value of the CC-to-ground resistor is within a first target range. For example, the resistance value of the CC-to-ground resistor may be consistent with the resistance value of the RC resistor. The consistency of the resistance value of the CC-to-ground resistor and the RC resistor means that the resistance value of the CC-to-ground resistor is equal to, slightly greater than, or slightly less than the resistance value of the RC resistor. Alternatively, the consistency of the resistance value of the CC-to-ground resistor and the RC resistor means that the resistance value of the CC-to-ground resistor and the RC resistor are equal to or close to each other.

[0082] The resistance value of the CC-to-ground resistor is within the fourth target range, which may indicate that the connection status is not that the charging gun is connected. For example, the resistance value of the CC-to-ground resistor is within the fourth target range, which may indicate that the connection status is that the charging gun is not fully connected, the charging gun is not connected, or the charging gun is abnormally connected.

[0083] The resistance value of the CC-to-ground resistor is within a fourth target range, for example, a range that does not include the value within the first target range.

[0084] The resistance value of the CC-to-ground resistor is within the second target range, which indicates that the charging gun is not fully connected.

[0085] The resistance value of the CC resistor to ground is within a second target range. For example, the resistance value of the CC resistor to ground may be consistent with the sum of the resistance values ​​of the RC resistor and the resistance value of the R4 resistor. The consistency of the resistance value of the CC resistor to ground and the sum of the resistance values ​​of the RC resistor and the R4 resistor means that the resistance value of the CC resistor to ground is equal to, slightly greater than, or slightly less than the sum of the resistance values ​​of the RC resistor and the R4 resistor. In other words, the consistency of the resistance value of the CC resistor to ground and the RC resistor means that the resistance value of the CC resistor to ground is equal to or close to the sum of the resistance values ​​of the RC resistor and the R4 resistor.

[0086] The resistance value of the CC-to-ground resistor is within the third target range, which indicates that the connection status is that the charging gun is not connected.

[0087] The resistance value of the CC-to-ground resistor is within a third target range. For example, the resistance value of the CC-to-ground resistor may be infinite.

[0088] The CP voltage value can represent the connection status of the charging gun as follows:

[0089] The voltage value of the CP voltage is within the fifth target range, which can indicate that the connection status is that the charging gun is connected or the charging gun is not fully connected.

[0090] The voltage value of the CP voltage is within a fifth target range, for example, may be greater than or equal to the first preset value.

[0091] The voltage value of the CP voltage is within the sixth target range, which can indicate that the connection status is that the charging gun is not connected.

[0092] The voltage value of the CP voltage is within a sixth target range, for example, may be less than the first preset value.

[0093] In some embodiments, as shown in FIG3 , the connection status between the charging gun and the vehicle is determined based on the parameter values ​​of the first parameter and the second parameter of the charging interface circuit. The connection status represented by the second parameter can be used to assist in determining whether the connection status represented by the first parameter is normal, which may include but is not limited to the following steps:

[0094] Step S301: Determine whether the value of the first parameter is within the first target range. If so, execute step S3011; if not, execute any one of S302 to S304.

[0095] Step S3011: The connection status is that the charging gun is connected.

[0096] If the resistance value of the CC-to-ground resistor is within the first target range, it can be determined that the connection state between the charging gun and the vehicle is charging gun connected.

[0097] Step S302: Determine whether the value of the first parameter is within the second target range. If so, execute step S3021.

[0098] Step S3021: The connection status is that the charging gun is not fully connected.

[0099] If the resistance value of the CC-to-ground resistor is within the second target range, it can be determined that the connection status between the charging gun and the vehicle is that the charging gun is not fully connected.

[0100] Step S303: determine whether the value of the first parameter is within the third target range; if so, execute step S3031.

[0101] Step S3031: The connection status is that the charging gun is not connected.

[0102] If the resistance value of the CC-to-ground resistor is within the third target range, it can be determined that the connection status between the charging gun and the vehicle is that the charging gun is not connected.

[0103] Step S304: determine whether the value of the second parameter is within the fifth target range; if so, execute step S3041.

[0104] Step S3041: The connection status is that the charging gun connection is abnormal.

[0105] If, in step S301, it is determined that the resistance value of the CC-to-ground resistor is not within the first target range, for example, the resistance value of the CC-to-ground resistor is within the fourth target range, then it can be indicated that the connection state is not charging gun connected. If it is determined that the voltage value of the CP voltage is within the fifth target range, that is, it is indicated that the connection state is charging gun connected or the charging gun is not fully connected. If the connection states represented by the parameter value of the first parameter and the parameter value of the second parameter are inconsistent, then it is determined that the connection state between the charging gun and the vehicle is abnormal charging gun connection.

[0106] In some embodiments, as shown in FIG4 , the connection status between the charging gun and the vehicle is determined based on the parameter value of the first parameter and the parameter value of the second parameter of the charging interface circuit. The connection status represented by the first parameter can also be confirmed by the connection status represented by the second parameter. Only when the connection status represented by the parameter value of the first parameter is consistent with the connection status represented by the parameter value of the second parameter, the connection status between the charging gun and the vehicle is determined to be consistent. The steps may include but are not limited to the following:

[0107] Step S401: Determine whether the first parameter is within a first target range. If so, execute step S404; if not, execute at least one of S402 or S403.

[0108] Step S404: Determine whether the second parameter is within the fifth target range. If so, execute step S4041; if not, execute step S407.

[0109] Step S4041: The connection status is that the charging gun is connected.

[0110] For example, if step S401 determines that the resistance value of the CC-to-ground resistance is within the first target range, indicating that the connection state is charging gun connected, and step S404 determines whether the voltage value of the CP voltage is within the fifth target range, indicating that the connection state is charging gun connected or not fully connected, then the connection state between the charging gun and the vehicle is determined to be charging gun connected.

[0111] Step S402: Determine whether the first parameter is within a third target range. If so, execute step S405.

[0112] Step S405: Determine whether the second parameter is within the sixth target range. If so, execute step S4051; if not, execute step S407.

[0113] Step S4051: The connection status is that the charging gun is not connected.

[0114] For example, if step S402 determines that the resistance value of the CC-to-ground resistance is within the third target range, indicating that the connection state is that the charging gun is not connected, and step S405 determines that the voltage value of the CP voltage is within the sixth target range, indicating that the charging state is also that the charging gun is not connected, then it is determined that the connection state between the charging gun and the vehicle is that the charging gun is not connected.

[0115] Step S403: Determine whether the first parameter is within the second target range. If so, execute step S406.

[0116] Step S406: Determine whether the second parameter is within the fifth target range. If so, execute step S4061; if not, execute step S407.

[0117] Step S4061: The connection status is that the charging gun is not fully connected.

[0118] For example, if step S403 determines that the resistance value of the CC-to-ground resistance is within the second target range, indicating that the connection status is that the charging gun is not fully connected, and step S405 determines that the voltage value of the CP voltage is within the fifth target range, indicating that the charging status is that the charging gun is connected or the charging gun is not fully connected, then it is determined that the connection status between the charging gun and the vehicle is that the charging gun is not fully connected.

[0119] Step S407: The connection status is that the charging gun connection is abnormal.

[0120] In some embodiments, after the charging gun is connected to the vehicle, the connection status information of the charging gun is sent to the user.

[0121] In some embodiments, sending the connection status information of the charging gun includes at least one of the following: controlling the vehicle terminal to send a first prompt message, the first prompt message is used to prompt the user of the connection status of the charging gun; or sending the connection status information of the charging gun to the mobile terminal, so that the mobile terminal reminds and notifies the user of the connection status of the charging gun.

[0122] For example, the car computer can be controlled to emit a prompt sound and display a charging gun connection status icon; for another example, when the connection status is abnormal, a reminder such as "Charging gun connection abnormality" can be displayed on the car computer; for another example, a charging gun connection abnormality message can be sent via a mobile terminal; various audio and optical prompts can be used to inform the user of the charging gun connection status, which are not listed here one by one.

[0123] Figure 5 is a schematic diagram of a charging gun connection status detection device according to some embodiments. As shown in Figure 5 , the charging gun connection status detection device 20 includes a processor 21. For example, the charging gun connection status detection device includes one or more processors 21. The processor 21 can be configured to execute a computer program to cause the charging gun connection status detection device 20 to perform the above-described charging gun connection status detection method.

[0124] In some embodiments, the charging gun connection status detection device 20 further includes a memory 22, which is used to store a computer program executable by the processor 21. The computer program stored in the memory 22 may include one or more modules, each corresponding to a set of instructions.

[0125] In addition, the charging gun connection state detection device 20 may further include a communication component 23 , which may be configured to implement a communication function of the charging gun connection state detection device 20 , such as wired or wireless communication.

[0126] FIG6 is a schematic diagram of a charging system according to some embodiments. As shown in FIG6 , the charging system 40 includes the charging gun connection status detection device 20 and the charging interface circuit 10 . The charging gun connection status detection device 20 is connected to the charging interface circuit 10 .

[0127] Some embodiments of the present disclosure further provide a vehicle, which can be a pure electric vehicle or a hybrid vehicle. The vehicle includes a charging gun connection status detection device 20 that executes a corresponding charging gun connection status detection program to detect the connection status between the charging gun and the vehicle.

[0128] Some embodiments of the present disclosure further provide a vehicle power supply device, which includes a charging gun connection status detection device 20 or a charging system 40 .

[0129] In other embodiments, a non-volatile computer storage medium including program instructions is further provided. When executed by the processor 21, the program instructions implement the above-mentioned charging gun connection status detection method. For example, the non-volatile computer storage medium may be the memory 22 including the program instructions. The program instructions may be executed by the processor 21 of the charging gun connection status detection device 20 to implement the above-mentioned charging gun connection status detection method.

[0130] Some embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0131] In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0132] As described above, the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit the same. Although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A method for detecting the connection status of a charging gun, used in a vehicle, wherein: The charging gun connection status detection method includes: When the vehicle is connected to a charging gun of an AC charging pile, a connection state between the charging gun and the vehicle is determined according to a parameter value of a first parameter and a parameter value of a second parameter of a charging interface circuit.

2. The method according to claim 1, wherein The second parameter includes the CP voltage.

3. The method according to claim 1, wherein The connection status includes one or more of a charging gun connected, a charging gun not connected, a charging gun not fully connected, and a charging gun connection abnormality.

4. The method according to claim 3, further comprising: If it is determined that the connection status is that the charging gun is abnormally connected, the power output of the vehicle is limited.

5. The method according to any one of claims 1 to 4, wherein The determining the connection status between the charging gun and the vehicle according to the parameter value of the first parameter and the parameter value of the second parameter of the charging interface circuit includes at least one of the following: If the parameter value of the first parameter is within a first target range, the connection state is charging gun connection; If the parameter value of the first parameter is within the second target range, the connection status is that the charging gun is not fully connected; If the parameter value of the first parameter is within a third target range, the connection status is that the charging gun is not connected; If the parameter value of the first parameter is within the fourth target range and the second parameter is within the fifth target range, the connection status is that the charging gun connection is abnormal; If the parameter value of the first parameter is within the first target range and the second parameter is within the fifth target range, the connection status is charging gun connection; If the parameter value of the first parameter is within the second target range and the second parameter is within the fifth target range, the connection status is that the charging gun is not fully connected; or If the parameter value of the first parameter is within the third target range and the second parameter is within the sixth target range, the connection status is that the charging gun is not connected.

6. The method according to claim 5, wherein: The first target range includes a range of resistance values ​​of an RC resistor of the charging interface circuit; The second target range includes a range of the sum of the resistance value of the RC resistor and the resistance value of the R4 resistor of the charging interface circuit; The RC resistor is a detection resistor connected in series with the first switch of the charging interface circuit, and the R4 resistor is a detection resistor connected in parallel with the first switch.

7. The method according to any one of claims 1 to 6, wherein The first parameter includes CC resistance to ground.

8. The method according to any one of claims 1 to 7, further comprising: After determining the connection status between the charging gun and the vehicle, the connection status information of the charging gun is sent.

9. The method according to claim 8, wherein The connection status information is information sent to the user.

10. The method according to claim 8, wherein The sending of the connection status information of the charging gun includes at least one of the following: Control the vehicle terminal to send a first prompt message, wherein the first prompt message is used to remind the user of the connection status of the charging gun; or The connection status information of the charging gun is sent to the mobile terminal, so that the mobile terminal reminds and notifies the user of the connection status of the charging gun.

11. A charging gun connection status detection device, comprising a processor, wherein the processor is connected to a memory, the memory is used to store a computer program, and the processor calls the computer program to execute the method according to any one of claims 1 to 10.

12. A charging system comprising a charging interface circuit and the charging gun connection status detection device according to claim 11, wherein the charging gun connection status detection device is connected to the charging interface circuit.

13. A vehicle comprising at least one of the charging gun connection status detection device according to claim 11 or the charging system according to claim 12.

14. A vehicle power supply device, comprising at least one of the charging gun connection status detection device according to claim 11 or the charging system according to claim 12.

15. A computer storage medium storing a computer program, wherein when the computer program is executed by a processor, the method according to any one of claims 1 to 10 is implemented.

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