Charging gun connection state detection method and device and vehicle

Abstract

The invention discloses a charging gun connection state detection method and device which are applied to a vehicle, and when the vehicle is connected with a charging gun of an alternating current charging pile, the connection state of the charging gun and the vehicle is determined according to parameter values of a first parameter and a second parameter of a charging interface circuit. The parameter values of the first parameter and the second parameter can respectively represent the connection state of the charging gun, and through comprehensive judgment of the parameter values of the first parameter and the second parameter, the situation of abnormal connection detection of the charging gun is identified, the connection state of the charging gun and the vehicle is confirmed, and the accuracy of connection state detection of the charging gun is improved.

Description

Technical Field

[0001] The present invention relates to a method for detecting the connection status of a charging gun, and in particular to a method, a device and a vehicle for detecting the connection status of a charging gun. Background Art

[0002] 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 to the vehicle, resulting in inaccurate detection of the connection state between the charging gun and the vehicle. In severe cases, for example, the charging gun is in an incompletely connected state or a connected state, but it is mistakenly detected that the connection state between the charging gun and the vehicle is a disconnected state, which may even lead to serious accidents such as starting with the gun dragging. Summary of the invention

[0003] The present invention provides a method and device for detecting the connection status of a charging gun, and a vehicle.

[0004] In a first aspect, the present invention provides a method for detecting a connection status of a charging gun, the method comprising:

[0005] When the vehicle is connected to the charging gun of the AC charging pile, the connection state between the charging gun and the vehicle is determined according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit.

[0006] 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.

[0007] If the connection state represented by the parameter value of the first parameter is consistent with the connection state represented by the parameter value of the second parameter, it can be determined that the connection state between the charging gun and the vehicle is a consistent connection state; if the connection state represented by the parameter value of the first parameter is inconsistent with the connection state represented by the parameter value of the second parameter, the connection state detection between the charging gun and the vehicle may be abnormal;

[0008] 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 values ​​of the first parameter and the second parameter, the user is reminded in time to avoid a serious accident in which the vehicle starts with the gun dragging.

[0009] The connection status between the charging gun and the vehicle is determined according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit. The connection status represented by the parameter values ​​of the first parameter and 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 safety accidents or poor user experience caused by incorrect detection of the connection status of the charging gun.

[0010] In some possible embodiments, the second parameter includes a CP voltage.

[0011] In some possible embodiments, the connection status between the charging gun and the vehicle includes at least one or more of the following: the charging gun is connected, the charging gun is not connected, the charging gun is not fully connected, and the charging gun is abnormally connected.

[0012] In some possible embodiments, if it is determined that the connection state between the charging gun and the vehicle is abnormal, the power output of the vehicle is limited.

[0013] In some possible embodiments, determining the connection state between the charging gun and the vehicle according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit includes:

[0014] If the parameter value of the first parameter is within the first preset range, the connection state is that the charging gun is connected; and / or

[0015] If the parameter value of the first parameter is within the second preset range, the connection status is that the charging gun is not fully connected; and / or

[0016] If the parameter value of the first parameter is within the third preset range, the connection status is that the charging gun is not connected; and / or

[0017] If the parameter value of the first parameter is within the fourth preset range, and the parameter value of the second parameter is within the fifth preset range, the connection status is that the charging gun connection is abnormal; and / or

[0018] If the parameter value of the first parameter is within the first preset range, and the parameter value of the second parameter is within the fifth preset range, the connection state is charging gun connection; and / or

[0019] If the parameter value of the first parameter is within the second preset range, and the parameter value of the second parameter is within the fifth preset range, the connection status is that the charging gun is not fully connected; and / or

[0020] If the parameter value of the first parameter is within the third preset range, and the parameter value of the second parameter is within the sixth preset range, the connection status is that the charging gun is not connected.

[0021] In some possible embodiments, the first preset range includes the resistance value of the RC resistor of the charging interface circuit; the second preset range includes the sum of the resistance value of the RC resistor and the resistance value of the R4 resistor of the charging interface circuit, wherein 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.

[0022] In some possible embodiments, the first parameter includes CC resistance to ground.

[0023] In some possible embodiments, after the connection status between the charging gun and the vehicle is determined, the user is notified of the connection status of the charging gun.

[0024] In some possible embodiments, notifying the user includes: 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; and / or sending the connection status information of the charging gun to the mobile terminal so that the mobile terminal reminds the user of the connection status of the charging gun.

[0025] In a second aspect, the present invention provides a charging gun connection status detection device, the charging gun connection status detection device comprising a processor, the processor is connected to a memory, the memory is used to store a computer program, the processor calls the computer program to execute the method described in the first aspect.

[0026] In a third aspect, the present invention provides a charging system, comprising a charging interface circuit and the charging gun connection status detection device described in the second aspect, wherein the charging gun connection status detection device is connected to the charging interface circuit.

[0027] In a fourth aspect, the present invention provides a vehicle, comprising the charging gun connection status detection device described in the second aspect, and / or the charging system described in the third aspect.

[0028] In a fifth aspect, the present invention provides a vehicle power supply device, characterized in that it includes the charging gun connection status detection device described in the second aspect, and / or the charging system described in the third aspect.

[0029] In a sixth aspect, the present invention 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

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1is a schematic diagram of the process of the charging gun connection status detection method according to an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of a charging interface circuit of an embodiment of the present application;

[0033] Figure 3 is another schematic diagram of the process of the charging gun connection status detection method according to an embodiment of the present application;

[0034] Figure 4 It is another schematic diagram of the process of the charging gun connection status detection method according to an embodiment of the present application;

[0035] Figure 5 is a schematic diagram of a charging gun connection status detection device according to an embodiment of the present application;

[0036] Figure 6 It is a schematic diagram of a charging system according to an embodiment of the present application.

[0037] Reference numerals:

[0038] 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 A 16; detection point B 17; signal line 18; processor 21; memory 22; communication component 23. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and 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 a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0040] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged 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, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] In the related art, when a vehicle is connected to the charging gun of an AC charging pile, it is determined whether the charging gun is connected by detecting a certain parameter state of the charging interface circuit, but the abnormal state of the charging gun connection detection is not considered. In some cases, such as a fault in the charging interface circuit connecting the charging pile and the vehicle, the connection state of the charging gun and the vehicle is not accurately detected. In serious cases, for example, the charging gun is in an incompletely connected state or a connected state, but the connection state of the charging gun and the vehicle is mistakenly detected as being disconnected, which may even lead to serious accidents such as dragging the gun to start. The connection state of the charging gun is comprehensively judged by using 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 to ground resistance, which can not only improve the detection accuracy of the connection state of the charging gun, but also identify the abnormal state of the connection detection of the charging gun.

[0042] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0043] See also Figure 1 A schematic diagram of a process of a charging gun connection status detection method shown in an exemplary embodiment of the present application, 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 comprising the following steps:

[0044] Step S101: when the vehicle is connected to the charging gun of the AC charging pile, the parameter values ​​of the first parameter and the second parameter of the charging interface circuit are obtained.

[0045] The charging interface circuit includes an interface circuit of a vehicle power supply device, or an interface circuit of the vehicle, or an interface circuit of the vehicle power supply device and an interface circuit of the vehicle; the interface circuit of the vehicle power supply device and the interface circuit of the vehicle are connected to the vehicle interface through a charging gun to electrically connect the vehicle power supply device to the vehicle.

[0046] In some possible embodiments, the vehicle power supply device includes a charging pile.

[0047] The first parameter and the second parameter are parameters of the charging interface circuit obtained after the charging gun is connected to the vehicle. For example, they may be circuit parameters such as voltage and resistance. The parameter value of the first parameter or the parameter value of the second parameter can characterize the state of the charging interface circuit, and then characterize the connection state between the charging gun and the vehicle.

[0048] Step S102: determining the connection status between the charging gun and the vehicle according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit.

[0049] For example, the parameter value of the first parameter may 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 may 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;

[0050] If the connection state between the charging gun and the vehicle represented by the parameter value of the first parameter is consistent with the connection state represented by the parameter value of the second parameter, it can be determined that the connection state between the charging gun and the vehicle is a consistent connection state; if the connection state between the charging gun and the vehicle represented by the parameter value of the first parameter is inconsistent with the connection state represented by the parameter value of the second parameter, the connection state detection between the charging gun and the vehicle may be abnormal;

[0051] 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 values ​​of the first parameter and the second parameter, the user is reminded in time to avoid a serious accident in which the vehicle starts with the gun dragging.

[0052] The connection status of the charging gun and the vehicle is determined according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit. The connection status of the charging gun represented by the parameter values ​​of the first parameter and 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 safety accidents or poor user experience caused by incorrect detection of the connection status of the charging gun.

[0053] In some possible embodiments, the first parameter includes CC resistance to ground.

[0054] For example, in the related art, a connection confirmation function (CC) can be implemented through a charging interface circuit to reflect the connection status between the charging gun and the vehicle in an electronic or mechanical manner. The charging interface circuit may include one or more resistors, and the CC-to-ground resistance is the equivalent resistance of a certain set point in the charging interface circuit to the ground. The resistance value of the CC-to-ground resistance can represent the connection status between the charging gun and the vehicle.

[0055] In some possible embodiments, the second parameter includes a CP voltage.

[0056] For example, in the related art, the control polite function (CP) can be implemented through the charging interface circuit to monitor the interaction between the vehicle and the vehicle power supply device, generally using a pulse modulation (PWM) signal and a communication method with alternating amplitudes. The CP voltage can be the voltage of the pulse modulation signal, and the voltage value of the CP voltage can represent the connection status between the charging gun and the vehicle.

[0057] In some possible embodiments, if it is determined that the connection state between the charging gun and the vehicle is abnormal, the power output of the vehicle is limited.

[0058] When the detection of the connection status between the charging gun and the vehicle may be 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, wherein the connection status represented by the parameter value of the first parameter or 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 and causing the gun to be dragged to start can be avoided.

[0059] In some possible embodiments, the connection status between the charging gun and the vehicle includes at least one or more of the following: the charging gun is connected, the charging gun is not connected, the charging gun is not fully connected, and the charging gun is abnormally connected.

[0060] In some possible embodiments, the connection state between the charging gun and the vehicle is determined according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit, including one or more of the following conditions:

[0061] If the parameter value of the first parameter is within the first preset range, the connection state is that the charging gun is connected;

[0062] If the parameter value of the first parameter is within the second preset range, the connection status is that the charging gun is not fully connected;

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

[0064] If the parameter value of the first parameter is within the fourth preset range, and the parameter value of the second parameter is within the fifth preset range, the connection status is that the charging gun connection is abnormal;

[0065] If the parameter value of the first parameter is within the first preset range, and the parameter value of the second parameter is within the fifth preset range, the connection state is that the charging gun is connected;

[0066] If the parameter value of the first parameter is within the second preset range, and the parameter value of the second parameter is within the fifth preset range, the connection status is that the charging gun is not fully connected;

[0067] If the parameter value of the first parameter is within the third preset range, and the parameter value of the second parameter is within the sixth preset range, the connection status is that the charging gun is not connected.

[0068] In some possible embodiments, the first preset range includes the resistance value of the RC resistor of the charging interface circuit; the second preset range includes the sum of the resistance value of the RC resistor and the resistance value of the R4 resistor of the charging interface circuit, wherein 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.

[0069] For example, see Figure 2 The schematic diagram of a charging interface circuit of an optional embodiment of the present application is shown, 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, 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 detection device 20, the detection point A16 is set between the RC resistor 13 and the charging gun connection detection device 20, the charging gun connection detection device 20 is configured to detect the resistance value of the detection point A16 to the ground, and the first switch 11 is configured to be closed after the charging gun is fully connected to the vehicle.

[0070] The resistance to ground 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 resistance to ground 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 resistance to ground 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 resistance to ground detected by detection point A16 is the resistance value of RC resistor 13.

[0071] Conversely, the parameter value of the first parameter can also characterize the connection status of the charging gun. If the resistance value of the ground resistance detected by the detection point A16 is infinite, it characterizes the connection status of the charging gun as being 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 characterizes the connection status of the charging gun as being 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 characterizes the connection status of the charging gun as being connected.

[0072] In some possible embodiments, the charging interface circuit also includes a signal line 18, the vehicle power supply equipment 200 is connected to the charging gun connection detection device 20 through the signal line 18, and the detection point B17 is set on the signal line 18. When the charging gun is connected to the vehicle through the vehicle interface 30, the signal line 18 is in a connected state, and when the charging gun is not connected to the vehicle, the signal line 18 is in a disconnected state; the CP voltage signal is transmitted via the signal line 18, the vehicle power supply equipment 200 is configured to output the CP voltage signal, and the charging gun connection detection device 20 is configured to detect the voltage value of the CP voltage signal at the detection point B17.

[0073] 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 detection device 20. The CP voltage signal can be transmitted to the charging gun connection detection device 20 via the signal line 18. The charging gun connection 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 preset range.

[0074] When the charging gun is not connected, the signal line 18 and the vehicle power supply equipment 200 and the charging gun connection detection device 20 are in a disconnected state, and the CP voltage signal cannot be transmitted to the charging gun connection detection device 20 via the signal line 18. The charging gun connection 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 preset range.

[0075] Conversely, the parameter value of the second parameter can also represent the connection state of the charging gun. If the voltage value detected at the detection point B17 is within the fifth preset range, it represents that the connection state of the charging gun is connected or not fully connected; if the voltage value detected at the detection point B17 is within the sixth preset range, it represents that the connection state is not connected.

[0076] See also Figure 3 is a schematic diagram of a process of a charging gun connection status detection method shown in a specific optional embodiment of the present application, Figure 4 This is another schematic diagram of the process of a charging gun connection status detection method shown in a specific optional embodiment of the present application, which determines the connection status between the charging gun and the vehicle according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit, including:

[0077] In some possible embodiments,

[0078] For example Figure 2 As shown, 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 resistance can characterize the connection status of the charging gun as follows:

[0080] The resistance value of the CC to ground resistance is within a first preset range, which can indicate that the connection state is a charging gun connection;

[0081] The resistance value of the CC-to-ground resistor is within a first preset range, for example, the resistance value of the CC-to-ground resistor is consistent with the resistance value of the RC resistor. The consistency of the resistance value of the CC-to-ground resistor with the resistance value of 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. In other words, the consistency of the resistance value of the CC-to-ground resistor with the resistance value of the RC resistor means that the resistance value of the CC-to-ground resistor is equal to or close to the resistance value of the RC resistor.

[0082] The resistance value of the CC-to-ground resistance is within a fourth preset range, which may indicate that the connection state is not a charging gun connection;

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

[0084] The resistance value of the CC to ground resistance is within the second preset range, which can indicate that the connection state is that the charging gun is not fully connected;

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

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

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

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

[0089] The voltage value of the CP voltage is within the fifth preset range, which may indicate that the connection state 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 preset 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 preset range, which can indicate that the connection state is that the charging gun is not connected;

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

[0093] In some possible embodiments, the connection state between the charging gun and the vehicle is determined according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit, and the connection state represented by the second parameter can be used to assist in determining whether the connection state 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 a first parameter is within a first preset range.

[0095] If the resistance value of the CC-to-ground resistor is within a first preset range, it can be determined that the connection state between the charging gun and the vehicle is that the charging gun is connected.

[0096] Step S302: Determine whether the value of the first parameter is within a second preset range.

[0097] If the resistance value of the CC-to-ground resistor is within the second preset range, it can be determined that the connection state between the charging gun and the vehicle is that the charging gun is not fully connected.

[0098] Step S303: Determine whether the value of the first parameter is within a third preset range.

[0099] If the resistance value of the CC-to-ground resistor is within a third preset range, it can be determined that the connection state between the charging gun and the vehicle is that the charging gun is not connected.

[0100] Step S304: determining whether the value of the second parameter is within a fifth preset range.

[0101] If step S301 determines that the resistance value of the CC-to-ground resistor is not within the first preset range, for example, the resistance value of the CC-to-ground resistor is within the fourth preset range, then it can be characterized that the connection state is not a charging gun connection; if it is determined that the voltage value of the CP voltage is within the fifth preset range, then it is characterized that the connection state is a charging gun connection or an incomplete connection of the charging gun; if the connection states represented by the parameter values ​​of the first parameter and the second parameter are inconsistent, then it is determined that the connection state between the charging gun and the vehicle is an abnormal charging gun connection.

[0102] In some possible embodiments, the connection state between the charging gun and the vehicle is determined according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit, and the connection state represented by the second parameter can also be used to confirm the connection state represented by the first parameter. When the connection state represented by the parameter value of the first parameter is consistent with the connection state represented by the parameter value of the second parameter, it is determined that the connection state between the charging gun and the vehicle is a consistent connection state, which may include but is not limited to the following steps:

[0103] Step S401: determine whether a first parameter is within a first preset range.

[0104] Step S404: determining whether the second parameter is within a fifth preset range.

[0105] For example, if step S401 determines that the resistance value of the CC-to-ground resistance is in the first preset range, the connection state represented is that the charging gun is connected, and step S404 determines that the voltage value of the CP voltage is in the fifth preset range, the connection state represented is that the charging gun is connected or not fully connected, then it is determined that the connection state between the charging gun and the vehicle is that the charging gun is connected.

[0106] Step S402: Determine whether the first parameter is within a third preset range.

[0107] Step S405: determining whether the second parameter is within a sixth preset range.

[0108] For example, if step S402 determines that the resistance value of the CC-to-ground resistance is within the third preset 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 preset 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;

[0109] Step S403: determining whether the first parameter is within a second preset range.

[0110] Step S406: Determine whether the second parameter is within the fifth preset range

[0111] For example, if step S403 determines that the resistance value of the CC-to-ground resistance is in the second preset range, the connection status represented is that the charging gun is not fully connected, and step S405 determines that the voltage value of the CP voltage is in the fifth preset range, the charging status represented 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.

[0112] In some possible embodiments, after determining the connection status between the charging gun and the vehicle, the control notifies the user of the connection status of the charging gun.

[0113] In some possible embodiments, controlling and notifying the user of the connection status of the charging gun includes: 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; and / 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.

[0114] For example, the car computer can be controlled to emit a prompt sound and display the connection status icon of the charging gun; for another example, when the connection status is that the charging gun is abnormally connected, a reminder such as "charging gun connection abnormality" can be displayed on the car computer; for another example, the charging gun connection abnormality information can be sent through the mobile terminal; the charging gun connection status can be prompted to the user through various sound and light prompt means, which are not listed here one by one.

[0115] Figure 5 is a schematic diagram of a charging gun connection state detection device shown in an exemplary embodiment of the present application. The charging gun connection state detection device 20 includes a processor 21, which may be one or more. The processor 21 may be configured to execute a related computer program so that the charging gun connection state detection device 20 performs the above-mentioned charging gun connection state detection method.

[0116] In some possible embodiments, the charging gun connection state detection device 20 further includes a memory 22 for storing 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.

[0117] 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.

[0118] Figure 6 is a schematic diagram of a charging system shown in an exemplary embodiment of the present application. The charging system 40 includes the charging gun connection state detection device 20 and the charging interface circuit 10. The charging gun connection state detection device 20 is connected to the charging interface circuit 10.

[0119] The present application also provides a vehicle, which may be a pure electric vehicle or a hybrid vehicle. The vehicle includes a charging gun connection state detection device 20, which executes a corresponding charging gun connection state detection program to detect the connection state between the charging gun and the vehicle.

[0120] The present application also provides a vehicle power supply device, which includes a charging gun connection status detection device 20 or a charging system 40.

[0121] In another exemplary embodiment, a non-volatile computer storage medium including program instructions is also provided, and the program instructions implement the above-mentioned charging gun connection state detection method when executed by the processor 21. For example, the non-volatile computer storage medium can be the above-mentioned memory 22 including program instructions, and the above-mentioned program instructions can be executed by the processor 21 of the charging gun connection state detection device 20 to complete the above-mentioned charging gun connection state detection method.

[0122] The preferred 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 in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0123] In the several embodiments provided in the present application, 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, 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.

[0124] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. 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 invention.

Claims

1. A charging gun connection status detection method for a vehicle, characterized in that: The charging gun connection status detection method comprises: 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 parameter values ​​of a first parameter and a second parameter of a charging interface circuit.

2. The method according to claim 1, characterized in that The second parameter includes a CP voltage.

3. The method according to claim 1, characterized in that The connection status includes at least one or more of a charging gun connected, a charging gun not connected, a charging gun not completely connected, and a charging gun connection abnormality.

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

5. The method according to claim 1, characterized in that: The determining the connection state between the charging gun and the vehicle according to the parameter values ​​of the first parameter and the second parameter of the charging interface circuit includes: If the parameter value of the first parameter is within a first preset range, the connection state is charging gun connection; and / or If the parameter value of the first parameter is within the second preset range, the connection status is that the charging gun is not fully connected; and / or If the parameter value of the first parameter is within a third preset range, the connection status is that the charging gun is not connected; and / or If the parameter value of the first parameter is within the fourth preset range, and the second parameter is within the fifth preset range, the connection status is that the charging gun connection is abnormal; and / or If the parameter value of the first parameter is within the first preset range, and the second parameter is within the fifth preset range, the connection state is charging gun connection; and / or If the parameter value of the first parameter is within the second preset range, and the second parameter is within the fifth preset range, the connection status is that the charging gun is not fully connected; and / or If the parameter value of the first parameter is within the third preset range, and the second parameter is within the sixth preset range, the connection status is that the charging gun is not connected.

6. The method according to claim 5, characterized in that The first preset range includes the resistance value of the RC resistor of the charging interface circuit; the second preset range includes the sum of the resistance value of the RC resistor and the resistance value of the R4 resistor of the charging interface circuit, wherein 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 claim 1, characterized in that The first parameter includes CC resistance to ground.

8. The method according to claim 1, characterized in that The method further comprises: After determining the connection status between the charging gun and the vehicle, the user is notified of the connection status of the charging gun.

9. The method according to claim 8, characterized in that The notifying the user includes: 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; and / or sending the connection status information of the charging gun to the mobile terminal so that the mobile terminal reminds the user of the connection status of the charging gun.

10. A charging gun connection status detection device, characterized in that: The charging gun connection status detection device includes a processor, 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 9.

11. A charging system, characterized in that: It comprises a charging interface circuit and the charging gun connection status detection device according to claim 10, wherein the charging gun connection status detection device is connected to the charging interface circuit.

12. A vehicle, characterized in that: The vehicle includes the charging gun connection status detection device according to claim 10 and / or the charging system according to claim 11.

13. A vehicle power supply device, characterized in that: The vehicle power supply equipment includes the charging gun connection status detection device according to claim 10 and / or the charging system according to claim 11.

14. A computer storage medium, characterized in that: The computer storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 9 is implemented.

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