Resistance detection method, device, medium, program product, controller and vehicle

Abstract

The present disclosure relates to a resistance detection method, device, medium, program product, controller and vehicle. The method includes: obtaining the current ambient temperature, the sampled resistance value of the first resistor, the current of the power supply system and the sampled voltage; determining the current impedance of the connector between the charging and distribution assembly shell and the vehicle body ground according to the current ambient temperature, the current of the power supply system and the sampled voltage; using the current impedance to correct the sampled resistance value to obtain the true resistance value of the first resistor. In this way, the purpose of real-time correction of the detection error of the connection confirmation signal detection circuit can be achieved, solving the problem of inaccurate connection confirmation signal detection caused by poor contact between the charging and distribution assembly shell and the vehicle body ground in electric vehicles, and ensuring the normal and stable operation of the vehicle charging and distribution function.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle charging technology, and in particular, to a resistance detection method, device, medium, program product, controller and vehicle. Background Art

[0002] Electric vehicles often determine the connection status of the charging gun in the charging and distribution system by performing a connection confirmation (CC) signal detection. The target of the connection confirmation signal detection is the resistance value of the analog resistor inside the charging gun. With the development of electric vehicles, the integration of various systems is getting higher and higher. Among them, the charging and distribution system, low-voltage power supply system, etc. are often connected to the vehicle body ground through a shared connector. When the shared connector has poor contact with the vehicle body ground, an impedance to the ground will be generated between the shared connector and the vehicle body ground. Because the analog resistor is connected in series with the connector, the impedance connector will divide the voltage across the analog resistor, causing the detected analog resistor to be inaccurate. Summary of the invention

[0003] The purpose of the present disclosure is to provide a resistance detection method, device, medium, program product, controller and vehicle.

[0004] In order to achieve the above objectives, in a first aspect, the present disclosure provides a resistance detection method, comprising:

[0005] Obtaining the current ambient temperature, the sampled resistance value of the first resistor, the current of the power supply system, and the sampled voltage, wherein the first resistor is the resistance between the vehicle body ground and the connection confirmation port of the charging and distribution assembly, and the first resistor is a thermistor, and the sampled voltage is the voltage between the vehicle body ground and the connection confirmation port;

[0006] Determine the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground according to the current ambient temperature, the current and the sampled voltage, wherein the power supply system is connected to the vehicle body ground through the connector;

[0007] The sampled resistance value is corrected using the current impedance to obtain a true resistance value of the first resistor.

[0008] Optionally, determining the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground according to the current ambient temperature, the current and the sampled voltage includes:

[0009] Determine, according to the current ambient temperature, a reference resistance value of the first resistor when the charging gun is not inserted into the charging port;

[0010] Determining a theoretical impedance value of the connector according to the reference resistance, the current and the sampled voltage;

[0011] The current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground is determined according to the reference resistance, the current and the theoretical impedance value.

[0012] Optionally, determining the theoretical impedance value of the connector according to the reference resistance, the current and the sampled voltage includes:

[0013] According to the reference resistance, the current and the sampled voltage, the theoretical impedance value of the connector is determined by the following formula:

[0014]

[0015] in, is the theoretical value of impedance; is the reference resistance; is the current; is the sampling voltage; To connect the vehicle end detection resistor in the confirmation signal detection circuit; The voltage of the vehicle-side power supply in the connection confirmation signal detection circuit is preset.

[0016] Optionally, determining the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground according to the reference resistance, the current and the theoretical impedance value includes:

[0017] According to the reference resistance, the current and the theoretical impedance value, the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground is determined by the following formula, including:

[0018]

[0019] in, is the current impedance; is the theoretical value of impedance; is the current; To connect the vehicle-end detection resistor in the confirmation signal detection circuit; is the reference resistance; A voltage of a vehicle-side preset power supply in the connection confirmation signal detection circuit; A current of the connection confirmation signal detection circuit is provided.

[0020] Optionally, the using the current impedance to correct the sampled resistance value to obtain a true resistance value of the first resistor includes:

[0021] The difference between the sampled resistance value and the current impedance is determined as the actual resistance value of the first resistor.

[0022] Optionally, the method further comprises:

[0023] A charging connection state is determined according to the actual resistance value of the first resistor.

[0024] Optionally, the power supply system is a low-voltage power supply system.

[0025] Optionally, the connecting member is a grounding wire.

[0026] In a second aspect, the present disclosure provides a resistance detection device, comprising:

[0027] an acquisition module, used to acquire the current ambient temperature, a sampled resistance value of a first resistor, a current of a power supply system, and a sampled voltage, wherein the first resistor is a resistor between a vehicle body ground and a connection confirmation port of a charging and distribution assembly, and the first resistor is a thermistor, and the sampled voltage is a voltage between the vehicle body ground and the connection confirmation port;

[0028] a first determination module, configured to determine a current impedance of a connector between a charging and distribution assembly housing and a vehicle body ground according to the current ambient temperature, the current, and the sampled voltage, wherein the power supply system is connected to the vehicle body ground through the connector;

[0029] The correction module is used to correct the sampled resistance value by using the current impedance to obtain the real resistance value of the first resistor.

[0030] In a third aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the resistance detection method provided in the first aspect of the present disclosure.

[0031] In a fourth aspect, the present disclosure provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the resistance detection method provided in the first aspect of the present disclosure.

[0032] In a fifth aspect, the present disclosure provides a controller, comprising:

[0033] a first memory having a computer program stored thereon;

[0034] The first processor is used to execute the computer program in the first memory to implement the steps of the resistance detection method provided in the first aspect of the present disclosure.

[0035] In a sixth aspect, the present disclosure provides a vehicle, comprising:

[0036] Charging and distribution assembly;

[0037] Power supply system; and

[0038] The controller provided according to the fifth aspect of the present disclosure.

[0039] In the above technical scheme, when performing connection confirmation signal detection, the current impedance of the connector between the charging and distribution assembly shell and the vehicle body ground is determined according to the current ambient temperature, the current of the power supply system and the sampling voltage. Then, according to the current impedance of the connector, the sampled resistance value of the resistance between the vehicle body ground and the connection confirmation port of the charging and distribution assembly (i.e., the internal analog resistance of the charging gun) is corrected, thereby achieving the purpose of real-time correction of the detection error of the connection confirmation signal detection circuit, solving the problem of inaccurate connection confirmation signal detection caused by poor contact between the charging and distribution assembly shell and the vehicle body ground (i.e., poor contact between the shared connector and the vehicle body ground) in the electric vehicle, and ensuring the normal and stable operation of the vehicle charging and distribution function.

[0040] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0042] Figure 1 It is a schematic diagram of a connection confirmation signal detection circuit in the related art.

[0043] Figure 2 It is a topological diagram of a connection confirmation signal detection circuit in the related art.

[0044] Figure 3 is a flow chart showing a resistance detection method according to an exemplary embodiment.

[0045] Figure 4 The figure is a topological structure diagram of a connection confirmation signal detection circuit and a power supply system according to an exemplary embodiment.

[0046] Figure 5 The topological structure diagram of a connection confirmation signal detection circuit is shown according to an exemplary embodiment.

[0047] Figure 6 is a block diagram of a resistance detection device according to an exemplary embodiment.

[0048] Figure 7 is a block diagram of a vehicle according to an exemplary embodiment. DETAILED DESCRIPTION

[0049] As discussed in the background technology, when the common connector of the charging and distribution assembly system and the low-voltage power supply system has poor contact with the vehicle body ground, impedance to the ground will be generated between the common connector and the vehicle body ground. Since the analog resistor is connected in series with the connector, the impedance connector will divide the voltage across the analog resistor, thereby causing inaccurate detected analog resistance.

[0050] Specifically, Figure 1 The schematic diagram of the connection confirmation signal detection circuit in the related art, wherein the vehicle controller measures the resistance value between the detection point 3 and the protective earthing (PE) terminal (i.e., the vehicle body ground and the connection confirmation port (i.e., Figure 1 The resistance value between the CC port in the charging gun, that is, the resistance value of the simulated resistor inside the charging gun) is used to determine whether the charging plug (i.e. the charging gun) is fully connected to the vehicle socket. When the charging plug and the vehicle socket are not connected, the CC port is not connected, and the resistance value between the detection point 3 and the PE end is infinite; when the charging plug and the vehicle socket are half-connected, the switch S3 is in the open state, the CC port is connected, and the resistance value between the detection point 3 and the PE end is R2+R3; when the charging plug and the vehicle socket are fully connected, the switch S3 is in the closed state, the CC port is connected, and the resistance value between the detection point 3 and the PE end is R2. At this time, the Figure 2 The CC signal detection circuit shown in .

[0051] Depend on Figure 2 It can be seen that the CC signal detection circuit is used to detect point a (corresponding to Figure 1 The voltage drop between the detection point 3) and the vehicle body ground is U a (i.e. the voltage between the vehicle body ground and the CC port), U a In fact, it is the voltage of the vehicle controller chip voltage VCC after being divided by the R1 resistor. When the resistance value of R1 is constant, U a The internal simulated resistance value of the charging gun can be obtained, where: Figure 2 Point b in the Figure 1 PE end in.

[0052] When the vehicle controller is arranged separately, the CC signal detection circuit can work normally. When the vehicle charging system adopts a charging and distribution assembly, if the shell of the charging and distribution assembly is in good contact with the vehicle body ground, it indicates that the connector shared by the charging and distribution assembly and the power supply system is in good contact with the vehicle body ground, then the CC signal detection circuit can also work normally, wherein the charging and distribution assembly includes a CC signal detection circuit. However, when the shell of the charging and distribution assembly is in poor contact with the vehicle body ground, it indicates that the connector shared by the charging and distribution assembly and the power supply system is in poor contact with the vehicle body ground, and there is a ground impedance between the shell of the charging and distribution assembly and the vehicle body ground, that is, the impedance of the connector. When the current of the power supply system flows through the ground impedance, a voltage drop will be generated at the ground impedance, and this voltage drop will affect U a The detection value of U a It is too large, resulting in the detected R1 resistance being too large, affecting the normal charging and distribution function of the vehicle.

[0053] In view of this, the present disclosure provides a resistance detection method, device, medium, program product, controller and vehicle.

[0054] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0055] Figure 3 FIG. 1 is a flow chart of a resistance detection method according to an exemplary embodiment. Figure 3 As shown, the resistance detection method may include the following S101-S103.

[0056] In S101, the current ambient temperature, the sampled resistance value of the first resistor, the current of the power supply system, and the sampled voltage are obtained.

[0057] In the present disclosure, the first resistor is the resistor between the vehicle body ground and the connection confirmation port of the charging and distribution assembly (eg Figure 4 and Figure 5 The resistance shown in R 2) and the first resistor is a thermistor. The sampling voltage is the voltage between the vehicle body ground and the connection confirmation port of the charging and distribution assembly, wherein the voltage can be sampled by a connection confirmation signal detection circuit.

[0058] The current of the power supply system is the output current of the power supply system, such as Figure 4 As shown, the power supply system can be a low-voltage power supply system of the vehicle. At this time, the current of the power supply system is Figure 4 The current shown in , wherein the first power supply system may include a low-voltage power supply module, a low-voltage load and a connector, and the low-voltage converter is used to connect to the low-voltage load, wherein the vehicle controller can monitor the current of the power supply system in real time.

[0059] In addition, the current ambient temperature can be collected by a temperature sensor installed on the vehicle.

[0060] In S102, the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground is determined according to the current ambient temperature, the current of the power supply system, and the sampled voltage.

[0061] In the present disclosure, the power supply system is connected to the vehicle body ground through a connector, that is, the charging and distribution assembly housing and the power supply system are grounded through the same connector. In this way, the connection confirmation signal detection circuit can reuse the connector between the charging and distribution assembly housing and the vehicle body ground, which can avoid using multiple long hard wires as the connection lines between the connection confirmation signal detection circuit and the vehicle body ground, effectively reducing the use of vehicle wiring harnesses, and having good benefits for vehicle layout and cost control.

[0062] In S103, the sampled resistance value is corrected using the current impedance to obtain the real resistance value of the first resistor.

[0063] In the present disclosure, the difference between the sampled resistance value and the current impedance may be determined as the actual resistance value of the first resistor.

[0064] In the above technical scheme, when performing connection confirmation signal detection, the current impedance of the connector between the charging and distribution assembly shell and the vehicle body ground is determined according to the current ambient temperature, the current of the power supply system and the sampling voltage. Then, according to the current impedance of the connector, the sampled resistance value of the resistance between the vehicle body ground and the connection confirmation port of the charging and distribution assembly (i.e., the internal analog resistance of the charging gun) is corrected, thereby achieving the purpose of real-time correction of the detection error of the connection confirmation signal detection circuit, solving the problem of inaccurate connection confirmation signal detection caused by poor contact between the charging and distribution assembly shell and the vehicle body ground (i.e., poor contact between the shared connector and the vehicle body ground) in the electric vehicle, and ensuring the normal and stable operation of the vehicle charging and distribution function.

[0065] In a possible implementation, the above-mentioned connector is a hard wire, that is, the charging and distribution assembly housing is connected to the vehicle body through the hard wire, and at the same time, the power supply system is also connected to the vehicle body through the connector.

[0066] In another implementation method, the above-mentioned connecting piece is a grounding wire, that is, the charging and distribution assembly housing is connected to the vehicle body ground through the grounding wire, and the power supply system is also connected to the vehicle body ground through the grounding wire, that is, the power supply system reuses the grounding wire to connect to the vehicle body ground. The power supply system reuses the grounding wire between the charging and distribution assembly housing and the vehicle body ground, which can avoid the use of multiple long hard wires as connecting wires between the power supply system and the vehicle body ground, and can effectively reduce the use of vehicle wiring harnesses, which has good benefits for vehicle layout and cost control. In addition, the resistance detection method provided by the present disclosure can also effectively eliminate the detection error caused by the change of the impedance of the grounding wire (for example, the grounding wire bolt is loose, the port is treated with anti-corrosion, etc., which will cause the impedance of the grounding wire to change). In addition, the detection error of the connection confirmation signal detection circuit can be corrected by the current ambient temperature without the need to configure an additional correction circuit on the vehicle, thereby reducing the cost of the vehicle.

[0067] The following is a detailed description of the specific implementation method of determining the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground according to the current ambient temperature, the current of the power supply system and the sampled voltage in the above S102. Specifically, it can be achieved by the following steps (a1) to (a3):

[0068] Step (a1): Determine, according to the current ambient temperature, a reference resistance value of the first resistor when the charging gun is not inserted into the charging port.

[0069] In the present disclosure, the temperature of the charging port when the charging gun is not inserted is not much different from the current ambient temperature. Therefore, the current ambient temperature can be used as the temperature of the charging port when the charging gun is not inserted. In this way, it is possible to avoid setting an additional temperature sensor at the charging port, thereby reducing vehicle costs.

[0070] Specifically, the current ambient temperature can be used as the temperature of the charging port when the charging gun is not inserted, and based on the corresponding relationship between the resistance value of the first resistor and the temperature, the resistance value corresponding to the temperature of the charging port when the charging gun is not inserted (i.e., the current ambient temperature) is determined as the reference resistance value of the first resistor when the charging gun is not inserted into the charging port.

[0071] Step (a2): Determine the theoretical impedance value of the connector according to the reference resistance, the current of the power supply system and the sampled voltage.

[0072] For example, the theoretical impedance value of the connector can be determined according to the reference resistance, the current of the power supply system and the sampled voltage through the following equation (1):

[0073] (1)

[0074] in, is the theoretical impedance value of the connector; is the reference resistance (such as Figure 4 and Figure 5 As shown in ); is the current of the power supply system; is the sampling voltage; To connect the vehicle-side detection resistor in the confirmation signal detection circuit (such as Figure 4 and Figure 5 As shown in ); The voltage of the vehicle-side preset power supply in the connection confirmation signal detection circuit (such as Figure 4 and Figure 5 The vehicle controller chip voltage shown in ).

[0075] because Affected by the output current of the power supply system, The resistance value detected by the CC signal detection circuit of the vehicle will be wrong. Introduced into the sampling circuit, the sampling voltage with error can be obtained as shown in the following equation (2):

[0076] (2)

[0077] From equation (2), we can deduce , that is, we get the above equation (1).

[0078] Step (a3): Determine the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground based on the reference resistance value, the current of the power supply system and the theoretical impedance value.

[0079] For example, the current impedance of the connection between the charging and distribution assembly housing and the vehicle body ground can be determined according to the reference resistance, the current of the power supply system and the theoretical impedance value by the following equation (3):

[0080] (3)

[0081] in, is the current impedance (e.g. Figure 4 As shown in ); To connect the current of the confirmation signal detection circuit (such as Figure 4 As shown in ).in, It can be detected by a current sensor, or, due to Usually much smaller than ( Usually in milliampere or even microampere levels. is several hundred amperes (e.g., 200A), therefore, when calculated by formula (3) hour, can be ignored, that is .

[0082] In seeking Afterwards, when the power supply system and the charging and distribution assembly (specifically the CC signal detection circuit) share the same connector, The voltage across It can be calculated according to formula (4). Figure 5 The CC signal detection circuit in The corresponding voltage drop increases, so it can be considered that in this CC signal detection circuit, the resistance of the ground wire increases. According to the voltage division law, a method that can approximately replace Functional , Not the impedance of the connector The actual resistance value of the two is the same, but they play the same role in the CC signal detection circuit.

[0083] (4)

[0084] From equation (4), we can deduce , that is, we get the above equation (3).

[0085] In addition, by Figure 4 It can be seen that , therefore, the sampling resistance .

[0086] In a possible implementation manner, the resistance detection method may further include the following steps:

[0087] The charging connection state is determined according to the actual resistance value of the first resistor.

[0088] In the present disclosure, the charging connection state is used to characterize whether the charging plug is fully connected to the vehicle socket. If the absolute value of the difference between the actual resistance value of the first resistor and the preset analog resistance threshold is less than or equal to the preset deviation threshold, it is determined that the charging plug is fully connected to the vehicle socket; if the absolute value of the difference between the actual resistance value of the first resistor and the preset analog resistance threshold is greater than the preset deviation threshold, it is determined that the charging plug is not fully connected to the vehicle socket.

[0089] Figure 6 FIG. 1 is a block diagram of a resistance detection device according to an exemplary embodiment. Figure 6 As shown, the resistance detection device 300 includes:

[0090] The acquisition module 301 is used to acquire the current ambient temperature, the sampled resistance value of the first resistor, the current of the power supply system, and the sampled voltage, wherein the first resistor is the resistance between the vehicle body ground and the connection confirmation port of the charging and distribution assembly, and the first resistor is a thermistor, and the sampled voltage is the voltage between the vehicle body ground and the connection confirmation port;

[0091] A first determination module 302 is used to determine a current impedance of a connector between a charging and distribution assembly housing and a vehicle body ground according to the current ambient temperature, the current, and the sampled voltage, wherein the power supply system is connected to the vehicle body ground through the connector;

[0092] The correction module 303 is used to correct the sampled resistance value by using the current impedance to obtain a real resistance value of the first resistor.

[0093] In the above technical scheme, when performing connection confirmation signal detection, the current impedance of the connector between the charging and distribution assembly shell and the vehicle body ground is determined according to the current ambient temperature, the current of the power supply system and the sampling voltage. Then, according to the current impedance of the connector, the sampled resistance value of the resistance between the vehicle body ground and the connection confirmation port of the charging and distribution assembly (i.e., the internal analog resistance of the charging gun) is corrected, thereby achieving the purpose of real-time correction of the detection error of the connection confirmation signal detection circuit, solving the problem of inaccurate connection confirmation signal detection caused by poor contact between the charging and distribution assembly shell and the vehicle body ground (i.e., poor contact between the shared connector and the vehicle body ground) in the electric vehicle, and ensuring the normal and stable operation of the vehicle charging and distribution function.

[0094] Optionally, the first determining module 302 includes:

[0095] A first determining submodule, configured to determine, according to the current ambient temperature, a reference resistance value of the first resistor when the charging gun is not inserted into the charging port;

[0096] A second determination submodule, configured to determine a theoretical impedance value of the connector according to the reference resistance, the current and the sampled voltage;

[0097] The third determination submodule is used to determine the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground according to the reference resistance, the current and the theoretical impedance value.

[0098] Optionally, the second determination submodule is used to determine the theoretical impedance value of the connector according to the reference resistance, the current and the sampled voltage by using the following formula:

[0099]

[0100] in, is the theoretical value of impedance; is the reference resistance; is the current; is the sampling voltage; To connect the vehicle-end detection resistor in the confirmation signal detection circuit; The voltage of the vehicle-side power supply in the connection confirmation signal detection circuit is preset.

[0101] Optionally, the third determination submodule is used to determine the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground according to the reference resistance, the current and the theoretical impedance value by using the following formula:

[0102]

[0103] in, is the current impedance; is the theoretical value of impedance; is the current; To connect the vehicle-end detection resistor in the confirmation signal detection circuit; is the reference resistance; A voltage of a vehicle-side preset power supply in the connection confirmation signal detection circuit; A current of the connection confirmation signal detection circuit is provided.

[0104] Optionally, the correction module 303 is used to determine the difference between the sampled resistance value and the current impedance as the real resistance value of the first resistor.

[0105] Optionally, the resistance detection device 300 further includes:

[0106] The second determining module is used to determine a charging connection state according to the actual resistance value of the first resistor.

[0107] Optionally, the power supply system is a low-voltage power supply system.

[0108] Optionally, the connecting member is a grounding wire.

[0109] Regarding the resistance detection device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the resistance detection method, and will not be elaborated here.

[0110] The present disclosure further provides a computer-readable storage medium having computer program instructions stored thereon, and when the program instructions are executed by a processor, the steps of the resistance detection method described in any embodiment of the present disclosure are implemented.

[0111] The present disclosure also provides a controller, comprising:

[0112] a first memory having a computer program stored thereon;

[0113] The first processor is used to execute the computer program in the first memory to implement the steps of the resistance detection method described in any embodiment of the present disclosure.

[0114] The present disclosure also provides a vehicle, comprising:

[0115] Charging and distribution assembly;

[0116] Power supply system; and

[0117] The controller described in any embodiment of the present disclosure.

[0118] The present disclosure also provides a computer program product, including a computer program, which implements the steps of the resistance detection method described in any embodiment of the present disclosure when the computer program is executed by a processor.

[0119] Figure 7 6 is a block diagram of a vehicle 600 according to an exemplary embodiment. For example, the vehicle 600 may be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle 600 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0120] Reference Figure 7 , the vehicle 600 may include various subsystems, for example, an infotainment system 610, a perception system 620, a decision control system 630, a drive system 640, and a computing platform 650. The vehicle 600 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, each subsystem and each component of the vehicle 600 may be interconnected by wire or wireless means.

[0121] In some embodiments, the infotainment system 610 may include a communication system, an entertainment system, and a navigation system, among others.

[0122] The perception system 620 may include several sensors for sensing information about the environment around the vehicle 600. For example, the perception system 620 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system or other positioning systems), an inertial measurement unit (IMU), a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0123] The decision control system 630 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0124] The drive system 640 may include components that provide powered motion for the vehicle 600. In one embodiment, the drive system 640 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, and an air compression engine. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0125] Some or all functions of the vehicle 600 are controlled by a computing platform 650. The computing platform 650 may include at least one second processor 651 and a second memory 652, and the second processor 651 may execute instructions 653 stored in the second memory 652.

[0126] The second processor 651 may be any conventional processor, such as a commercially available CPU. The processor may also include a graphics processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable Gate Array, FPGA), a system on chip (System on Chip, SOC), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) or a combination thereof.

[0127] The second memory 652 can be implemented by any type of volatile or non-volatile memory device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0128] In addition to the instructions 653 , the second memory 652 may also store data, such as road maps, route information, and data such as the location, direction, and speed of the vehicle. The data stored in the second memory 652 may be used by the computing platform 650 .

[0129] In the embodiment of the present disclosure, the second processor 651 may execute the instruction 653 to complete all or part of the steps of the above-mentioned resistance detection method.

[0130] 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.

[0131] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0132] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A resistance detection method, characterized in that: include: Obtaining the current ambient temperature, the sampled resistance value of the first resistor, the current of the power supply system, and the sampled voltage, wherein the first resistor is the resistance between the vehicle body ground and the connection confirmation port of the charging and distribution assembly, and the first resistor is a thermistor, and the sampled voltage is the voltage between the vehicle body ground and the connection confirmation port; Determine the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground according to the current ambient temperature, the current and the sampled voltage, wherein the power supply system is connected to the vehicle body ground through the connector; The difference between the sampled resistance value and the current impedance is determined as the actual resistance value of the first resistor.

2. The resistance detection method according to claim 1, characterized in that: The determining, according to the current ambient temperature, the current, and the sampled voltage, a current impedance of a connector between a charging and distribution assembly housing and a vehicle body ground includes: Determine, according to the current ambient temperature, a reference resistance value of the first resistor when the charging gun is not inserted into the charging port; Determining a theoretical impedance value of the connector according to the reference resistance, the current and the sampled voltage; The current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground is determined according to the reference resistance, the current and the theoretical impedance value.

3. The resistance detection method according to claim 2, characterized in that: The step of determining a theoretical impedance value of the connector according to the reference resistance, the current, and the sampled voltage includes: According to the reference resistance, the current and the sampled voltage, the theoretical impedance value of the connector is determined by the following formula: in, is the theoretical value of impedance; is the reference resistance; is the current; is the sampling voltage; To connect the vehicle end detection resistor in the confirmation signal detection circuit; The voltage of the vehicle-side preset power supply in the connected confirmation signal detection circuit.

4. The resistance detection method according to claim 2, characterized in that: The determining, according to the reference resistance, the current and the theoretical impedance value, the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground comprises: According to the reference resistance, the current and the theoretical impedance value, the current impedance of the connector between the charging and distribution assembly housing and the vehicle body ground is determined by the following formula, including: in, is the current impedance; is the theoretical value of impedance; is the current; To connect the vehicle end detection resistor in the confirmation signal detection circuit; is the reference resistance; A voltage of a vehicle-side preset power supply in the connection confirmation signal detection circuit; A current of the connection confirmation signal detection circuit is provided.

5. The resistance detection method according to any one of claims 1 to 4, characterized in that: The power supply system is a low voltage power supply system.

6. The resistance detection method according to any one of claims 1 to 4, characterized in that: The connecting piece is a grounding wire.

7. A resistance detection device, characterized in that: include: an acquisition module, used to acquire the current ambient temperature, a sampled resistance value of a first resistor, a current of a power supply system, and a sampled voltage, wherein the first resistor is a resistor between a vehicle body ground and a connection confirmation port of a charging and distribution assembly, and the first resistor is a thermistor, and the sampled voltage is a voltage between the vehicle body ground and the connection confirmation port; a first determination module, configured to determine a current impedance of a connector between a charging and distribution assembly housing and a vehicle body ground according to the current ambient temperature, the current, and the sampled voltage, wherein the power supply system is connected to the vehicle body ground through the connector; The correction module is used to determine the difference between the sampled resistance value and the current impedance as the real resistance value of the first resistor.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the resistance detection method described in any one of claims 1 to 6 are implemented.

9. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the steps of the resistance detection method according to any one of claims 1 to 6.

10. A controller, characterized in that: include: a first memory having a computer program stored thereon; A first processor is used to execute the computer program in the first memory to implement the steps of the resistance detection method according to any one of claims 1 to 6.

11. A vehicle, characterized in that: include: Charging and distribution assembly; Power supply system; as well as A controller according to claim 10.

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