High-low voltage interlocking loop detection system and method and vehicle

Abstract

The invention relates to a high-low voltage interlocking loop detection system and method and a vehicle, the system comprises resistors arranged on first to Nth interface branch lines of a high-low voltage interlocking loop, an acquisition module and an identification module, and the acquisition module is used for acquiring the current current or current voltage of the current high-low voltage interlocking loop; the identification module is used for determining a first loose resistance based on a preset current-loose resistance value mapping relation so as to take an interface position corresponding to the first loose resistance as a plug loose interface position, or determining a second loose resistance based on a preset voltage-loose resistance value mapping relation so as to take the interface position corresponding to the second loose resistance as a plug loose interface position; and taking the interface position corresponding to the second loose resistor as the loose interface position of the plug. Therefore, the problem that the specific position of the fault point cannot be checked in the prior art is solved, and the specific position of the plug loosening fault is judged by monitoring the current or voltage of the main loop in the high-low voltage interlocking loop, so that the troubleshooting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit detection, and in particular to a high-low voltage interlocking circuit detection system, method and vehicle. Background Art

[0002] Existing new energy vehicles mainly connect various devices together through wiring harnesses, which are divided into high-voltage wiring harnesses and low-voltage wiring harnesses. High-voltage wiring harnesses are mainly used to connect power batteries with high-power electrical appliances to provide the required electrical energy for the electrical appliances. Low-voltage wiring harnesses are mainly used for communication between various controllers inside the vehicle. Therefore, the connection of each wiring harness connector in a new energy vehicle is crucial, and any loose connection of the interface connector may cause the vehicle to fail to operate normally. Since new energy vehicles have many wiring harnesses, each wiring harness has at least one interface connector (i.e., plug and socket), therefore, it is crucial to detect the connection status of the interface connector.

[0003] In the related art, the low-voltage circuit is equipped with a detection circuit specifically used to detect the connection degree of the high-voltage and low-voltage interface connectors, which is called a high-low voltage interlocking device. The device determines whether there is a loose connector connection by detecting the on-off state of the circuit. If the circuit is on, it means that there is no loose connector connection; if the circuit is open, it means that there is a loose connector connection.

[0004] However, the high and low voltage interlocking system in the related art can only identify whether the connector connection is loose, but cannot determine the specific location of the loose connector, which causes certain difficulties in troubleshooting the fault point when a high and low voltage interlocking failure occurs, and it is urgent to solve this problem. Summary of the invention

[0005] The present application provides a high and low voltage interlocking circuit detection system, method and vehicle to solve the problem that the related technology cannot detect the specific location of the fault point. The specific location of the loose plug fault can be determined by monitoring the current or voltage of the main circuit in the high and low voltage interlocking circuit, thereby improving the efficiency of fault detection.

[0006] The first aspect of the present application provides a high-low voltage interlock circuit detection system, comprising the following steps:

[0007] The resistors provided on the first to Nth interface branches of the high and low voltage interlocking circuit, wherein N is an integer;

[0008] A detection resistor is set in the main circuit of the high and low voltage interlocking circuit;

[0009] An acquisition module, used for acquiring the current current of the current high and low voltage interlocking circuit or the current voltage of the detection resistor;

[0010] An identification module is used to determine a first loose resistance from the resistances on the first to Nth interface branches based on a preset current-loose resistance value mapping relationship according to the current current, so as to use the interface position corresponding to the first loose resistance as the loose interface position of the plug, or to determine a second loose resistance from the resistances on the first to Nth interface branches based on the current voltage of the detection resistor based on a preset voltage-loose resistance value mapping relationship, so as to use the interface position corresponding to the second loose resistance as the loose interface position of the plug.

[0011] Optionally, the acquisition module includes:

[0012] A current collecting component provided in the main circuit of the high and low voltage interlocking circuit;

[0013] Alternatively, a voltage collection component is provided in the main circuit of the high and low voltage interlocking circuit.

[0014] Optionally, the voltage acquisition component includes:

[0015] A voltage sensor is connected in parallel with the detection resistor.

[0016] Optionally, the current collecting component is a current sensor.

[0017] Optionally, the preset current-loose resistance value mapping relationship is generated by multiple current values ​​and loose resistance values ​​corresponding to each current value, wherein the multiple current values ​​are obtained when a plug of at least one of the first to Nth interfaces is loose.

[0018] Optionally, the preset voltage-loose resistance value mapping relationship is generated by multiple voltage values ​​and loose resistance values ​​corresponding to each voltage value, wherein the multiple voltage values ​​are obtained when a plug of at least one of the first to Nth interfaces is loose.

[0019] According to the high and low voltage interlocking circuit detection system provided by the embodiment of the present application, the circuit type of the current high and low voltage interlocking circuit is identified; if the circuit type is the first type, the current current of the current high and low voltage interlocking circuit is collected, and the first loose resistance is determined from the preset current-loose resistance value mapping relationship according to the current current; if the circuit type is the second type, the current voltage of the current high and low voltage interlocking circuit is collected, and the second loose resistance is determined from the preset voltage-loose resistance value mapping relationship according to the current voltage; the position of the loose interface of the plug is determined according to the first loose resistance or the second loose resistance. Thus, the problem that the related technology cannot troubleshoot the specific location of the fault point is solved, and the specific location of the plug loose fault is determined by monitoring the current or voltage of the main circuit in the high and low voltage interlocking circuit, thereby improving the efficiency of troubleshooting.

[0020] A second aspect of the present application provides a high-low voltage interlock circuit detection method, including:

[0021] Identify the circuit type of the current high and low voltage interlocking circuit;

[0022] If the circuit type is the first type, the current current of the current high and low voltage interlocking circuit is collected, and according to the current current, the first loose resistance is determined from a preset current-loose resistance value mapping relationship; if the circuit type is the second type, the current voltage of the detection resistor in the main circuit of the current high and low voltage interlocking circuit is collected, and according to the current voltage of the detection resistor, the second loose resistance is determined from a preset voltage-loose resistance value mapping relationship;

[0023] A plug loose interface position is determined according to the first loose resistance or the second loose resistance.

[0024] According to an embodiment of the present application, before determining the first loosening resistance from a preset current-resistance value mapping relationship according to the current current, the method further includes:

[0025] Acquire multiple current values ​​and a loose resistance value corresponding to each current value when a plug of at least one of the first to Nth interfaces is loose;

[0026] The preset current-loosening resistance value mapping relationship is generated according to the multiple current values ​​and the loosening resistance value corresponding to each current value.

[0027] According to an embodiment of the present application, before determining the first loosening resistance from a preset voltage-resistance value mapping relationship according to the current voltage, the method further includes:

[0028] Acquire multiple voltage values ​​and a loose resistance value corresponding to each voltage value when a plug of at least one of the first to Nth interfaces is loose;

[0029] The preset voltage-loosening resistance value mapping relationship is generated according to the multiple voltage values ​​and the loosening resistance value corresponding to each voltage value.

[0030] According to the high and low voltage interlocking circuit detection method provided by the embodiment of the present application, the circuit type of the current high and low voltage interlocking circuit is identified; if the circuit type is the first type, the current current of the current high and low voltage interlocking circuit is collected, and the first loose resistance is determined from the preset current-loose resistance value mapping relationship according to the current current; if the circuit type is the second type, the current voltage of the current high and low voltage interlocking circuit is collected, and the second loose resistance is determined from the preset voltage-loose resistance value mapping relationship according to the current voltage; the position of the loose interface of the plug is determined according to the first loose resistance or the second loose resistance. Thus, the problem that the related technology cannot troubleshoot the specific location of the fault point is solved, and the specific location of the plug loose fault is determined by monitoring the current or voltage of the main circuit in the high and low voltage interlocking circuit, thereby improving the efficiency of troubleshooting.

[0031] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the high and low voltage interlock circuit detection system as described in the above embodiment.

[0032] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] Figure 1 A block diagram of a high-low voltage interlock circuit detection system provided according to an embodiment of the present application;

[0035] Figure 2 A first type detection circuit according to an embodiment of the present application;

[0036] Figure 3 A second type detection circuit according to an embodiment of the present application;

[0037] Figure 4 Flow chart of a high and low voltage interlocking circuit detection method according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] Embodiments of the present application 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. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0039] The following describes the high and low voltage interlocking circuit detection system, method and vehicle of the embodiment of the present application with reference to the accompanying drawings. In view of the problem that the specific location of the fault point cannot be found in the above background technology, the present application provides a high and low voltage interlocking circuit detection system to identify the circuit type of the current high and low voltage interlocking circuit; if the circuit type is the first type, the current current of the current high and low voltage interlocking circuit is collected, and the first loose resistance is determined from the preset current-loose resistance value mapping relationship according to the current current; if the circuit type is the second type, the current voltage of the current high and low voltage interlocking circuit is collected, and the second loose resistance is determined from the preset voltage-loose resistance value mapping relationship according to the current voltage; the plug loose interface position is determined according to the first loose resistance or the second loose resistance. Thus, the problem that the related technology cannot find the specific location of the fault point is solved, and the specific location of the plug loose fault is determined by monitoring the current or voltage of the main circuit in the high and low voltage interlocking circuit, thereby improving the efficiency of fault detection.

[0040] Specifically, Figure 1 A block diagram of a high and low voltage interlock circuit detection system provided in an embodiment of the present application.

[0041] like Figure 1 As shown, the high-low voltage interlocking circuit detection system 10 includes: resistors 100 on the first to Nth interface branches, a detection resistor 200 , a collection module 300 and an identification module 400 .

[0042] Among them, the resistors 100 on the first to Nth interface branches are arranged in a high and low voltage interlocking loop, wherein N is an integer; the detection resistor 200 is arranged in the main circuit of the high and low voltage interlocking loop, and the acquisition module 300 is used to collect the current current of the current high and low voltage interlocking loop or the current voltage of the detection resistor; the identification module 400 is used to determine the first loose resistance from the resistors on the first to Nth interface branches according to the current current based on a preset current-loose resistance value mapping relationship, so as to use the interface position corresponding to the first loose resistance as the loose interface position of the plug, or to determine the second loose resistance from the resistors on the first to Nth interface branches according to the current voltage of the detection resistor based on a preset voltage-loose resistance value mapping relationship, so as to use the interface position corresponding to the second loose resistance as the loose interface position of the plug.

[0043] Specifically, the present application adds a branch line with a resistor next to the detection line of each interface on the basis of the original detection circuit, and the branch line does not pass through the interface, that is, the original detection circuit is in an open circuit state when the plug is not plugged in or the plug is loose, while the added branch line with a resistor is still in a conducting state when the plug is not plugged in. When the plug is tightly plugged in, the original detection circuit and the branch line with a resistor are both conducting, and when the plug is loose or disconnected, at this time, only the branch line with a resistor is in a conducting state.

[0044] It should be noted that the resistance value of each interface branch line is different.

[0045] Furthermore, the current current or current voltage of the current high-low voltage interlocking circuit is collected through the collection module 300 .

[0046] Optionally, the acquisition module 300 includes: a current acquisition component arranged in the main circuit of the high-low voltage interlocking circuit; or a voltage acquisition component arranged in the main circuit of the high-low voltage interlocking circuit.

[0047] Among them, the current collection component is a current sensor.

[0048] Specifically, if Figure 2 As shown, Figure 2 The current sensor set in the main circuit of the high and low voltage interlocking circuit is the current collection component, and the first resistor R 1 , the second resistor R 2 ...Nth resistor R N It is a resistor set on the first to Nth interface branches in the high and low voltage interlocking circuit.

[0049] Optionally, the voltage acquisition component includes: a voltage sensor, and the voltage sensor is connected in parallel with a detection resistor.

[0050] Specifically, if Figure 3 As shown, R 0 The detection resistor R is set in the main circuit of the high and low voltage interlocking circuit. 0 In parallel with the voltage sensor, the first resistor R 1 , the second resistor R 2 ...Nth resistor R N It is a resistor set on the first to Nth interface branches in the high and low voltage interlocking circuit.

[0051] Furthermore, the current current of the high and low voltage interlocking circuit is collected by a current collection component installed in the main circuit of the high and low voltage interlocking circuit, or the current voltage of the high and low voltage interlocking circuit is collected by a voltage collection component arranged in the high and low voltage interlocking circuit.

[0052] Further, assuming that the current high-low voltage interlocking circuit includes the first to fifth interfaces, the resistance on each interface branch line is respectively the first resistor R 1 , the second resistor R 2 , the third resistor R 3 , the fourth resistor R 4 and the fifth resistor R 5When the plug is loose or disconnected, for example, when the plug of the first interface is loose, the current value of the entire high-low voltage interlocking circuit obtained by the current acquisition component is the power supply voltage U of the circuit divided by the resistance value of the branch line at the interface where the plug is loose and the circuit protection resistance (circuit protection resistance R P To avoid excessive current when there is no looseness, the sum of the values ​​is set, that is, U / (R 1 +R P ), based on the preset current-loose resistance value mapping relationship, according to the current current value, the loose resistance can be determined from the resistances on the first to fifth interface branches as the first resistance R 1 , and then determine that the location of the loose plug interface is the location of the first interface. Since the resistance values ​​on the first to Nth interface branches are different, different current values ​​can be obtained when the plugs of different interfaces are loose. The BMS (Battery Management System) or other controller can determine the location of the loose plug interface through the current value.

[0053] In addition, the present application can also determine the specific location of the loose plug based on the voltage value collected by the voltage collection component in the high and low voltage interlocking circuit.

[0054] Specifically, assuming that the current high-low voltage interlocking circuit includes the first to fifth interfaces, the resistance on each interface branch line is respectively the first resistance R 1 , the second resistor R 2 , the third resistor R 3 , the fourth resistor R 4 and the fifth resistor R 5 When the plug is loose or disconnected, for example, when the plug of the second interface is loose, the current value I of the entire high-low voltage interlocking circuit is the power supply voltage U of the circuit divided by the resistance value of the branch line at the interface where the plug is loose and the sum of the detection resistor (the detection resistor acts as both a detection resistor and a circuit protection resistor in the circuit), that is, I = U / (R 2 +R 0 ), at this time, the voltage acquisition component collects the detection resistance R 0 The voltage value U 0 For U 0 =I*R 0 , based on the preset voltage-loose resistance value mapping relationship, according to the current detection resistance R 0 The voltage value can be determined from the resistance on the first to fifth interface branches. The loose resistance is the second resistance R 2 , and then determine that the location of the loose interface of the plug is the location of the second interface.

[0055] It is understandable that whenever a plug is loose, the change in resistance value at each interface will cause the detection resistor R 0 The voltage changes, and the BMS or other controller detects the resistor R 0 The size of the loaded voltage can be used to determine the location of the loose connector.

[0056] Therefore, by detecting the current or voltage value in the high and low voltage interlocking circuit, the position of the loose interface can be judged. When a high and low voltage interlocking fault occurs, the current value or voltage value monitored by the BMS or other controller through the current sensor or voltage sensor can accurately identify the interface position where the interlocking fault occurs, thereby improving the efficiency of troubleshooting.

[0057] Further, in some embodiments, a preset current-loose resistance value mapping relationship is generated by multiple current values ​​and loose resistance values ​​corresponding to each current value, wherein the multiple current values ​​are obtained when a plug of at least one of the first to Nth interfaces is loose.

[0058] Specifically, the preset current-looseness resistance value mapping relationship is achieved by setting resistors of different resistance values ​​at different interface positions. Those skilled in the art can set the current-looseness resistance value mapping relationship through a limited number of experiments, or obtain the current-looseness resistance value mapping relationship through computer simulation calculations, which is not specifically limited here.

[0059] Exemplarily, the preset current-loose resistance value mapping relationship may be as shown in Table 1:

[0060] Table 1

[0061]

[0062] Further, in some embodiments, a preset voltage-loose resistance value mapping relationship is generated by multiple voltage values ​​and loose resistance values ​​corresponding to each voltage value, wherein the multiple voltage values ​​are obtained when a plug of at least one of the first to Nth interfaces is loose.

[0063] Specifically, the preset voltage-loose resistance value mapping relationship is achieved by setting resistors of different resistance values ​​at different interface positions. Those skilled in the art can set the voltage-loose resistance value mapping relationship through a limited number of experiments, or obtain the voltage-loose resistance value mapping relationship through computer simulation calculation, which is not specifically limited here.

[0064] For example, taking the current value in Table 1 above as an example, the resistance of the detection resistor is R 0 , the preset voltage-loose resistance value mapping relationship can be shown in Table 2:

[0065] Table 2

[0066]

[0067] Therefore, the specific interface position where the high and low voltage interlocking fault occurs can be determined by monitoring the current or voltage value. The looseness of different interface plugs will cause different changes in the current collection component or the voltage collection component. The corresponding loose resistance can be obtained through the collected current value or voltage value, thereby obtaining the interface position where the plug is loose, avoiding the process of frequently plugging and unplugging connectors using the exhaustive method during troubleshooting.

[0068] According to the high-low voltage interlocking circuit detection system proposed in the embodiment of the present application, the circuit type of the current high-low voltage interlocking circuit is identified; if the circuit type is the first type, the current current of the current high-low voltage interlocking circuit is collected, and the first loose resistance is determined from the preset current-loose resistance value mapping relationship according to the current current; if the circuit type is the second type, the current voltage of the current high-low voltage interlocking circuit is collected, and the second loose resistance is determined from the preset voltage-loose resistance value mapping relationship according to the current voltage; the position of the loose interface of the plug is determined according to the first loose resistance or the second loose resistance. Thus, the problem that the related technology cannot troubleshoot the specific location of the fault point is solved, and the specific location of the plug loose fault is determined by monitoring the current or voltage of the main circuit in the high-low voltage interlocking circuit, thereby improving the efficiency of troubleshooting.

[0069] Next, a high and low voltage interlocking circuit detection method proposed according to an embodiment of the present application is described with reference to the accompanying drawings.

[0070] like Figure 4 As shown, the high and low voltage interlocking circuit detection method includes the following steps:

[0071] In step S401, the circuit type of the current high-low voltage interlocking loop is identified.

[0072] In step S402, if the circuit type is the first type, the current current of the current high and low voltage interlocking circuit is collected, and according to the current current, the first loosening resistance is determined from the preset current-loosening resistance value mapping relationship; if the circuit type is the second type, the current voltage of the detection resistor in the main circuit of the current high and low voltage interlocking circuit is collected, and according to the current voltage of the detection resistor, the second loosening resistance is determined from the preset voltage-loosening resistance value mapping relationship.

[0073] In step S403, the location of the loose interface of the plug is determined according to the first loose resistance or the second loose resistance.

[0074] Furthermore, in some embodiments, before determining the first loose resistance from a preset current-resistance value mapping relationship based on the current current, it also includes: obtaining multiple current values ​​and loose resistance values ​​corresponding to each current value when a plug is loose in at least one of the first to Nth interfaces; generating a preset current-loose resistance value mapping relationship based on the multiple current values ​​and the loose resistance value corresponding to each current value.

[0075] Furthermore, in some embodiments, before determining the first loose resistance from a preset voltage-resistance value mapping relationship based on the current voltage, it also includes: obtaining multiple voltage values ​​and loose resistance values ​​corresponding to each voltage value when a plug is loose in at least one of the first to Nth interfaces; generating a preset voltage-loose resistance value mapping relationship based on the multiple voltage values ​​and the loose resistance value corresponding to each voltage value.

[0076] It should be noted that the aforementioned explanation of the high and low voltage interlocking circuit detection system embodiment is also applicable to the high and low voltage interlocking circuit detection method of this embodiment, and will not be repeated here.

[0077] According to the high-low voltage interlocking circuit detection method proposed in the embodiment of the present application, the circuit type of the current high-low voltage interlocking circuit is identified; if the circuit type is the first type, the current current of the current high-low voltage interlocking circuit is collected, and according to the current current, the first loose resistance is determined from the preset current-loose resistance value mapping relationship; if the circuit type is the second type, the current voltage of the current high-low voltage interlocking circuit is collected, and according to the current voltage, the second loose resistance is determined from the preset voltage-loose resistance value mapping relationship; the position of the loose interface of the plug is determined according to the first loose resistance or the second loose resistance. Thus, the problem that the related technology cannot troubleshoot the specific location of the fault point is solved, and the specific location of the plug loose fault is determined by monitoring the current or voltage of the main circuit in the high-low voltage interlocking circuit, thereby improving the efficiency of troubleshooting.

[0078] In addition, an embodiment of the present application also provides a vehicle, which includes the above-mentioned high and low voltage interlock circuit detection system.

[0079] According to the vehicle proposed in the embodiment of the present application, the problem that the related technology cannot detect the specific location of the fault point is solved through the above-mentioned high and low voltage interlocking circuit detection system. The specific location of the loose plug fault is determined by monitoring the current or voltage of the main circuit in the high and low voltage interlocking circuit, thereby improving the efficiency of fault detection.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0082] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0083] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0084] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0085] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0086] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0087] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A high and low voltage interlock circuit detection system, It is characterized in that include: The resistors provided on the first to Nth interface branches of the high and low voltage interlocking circuit, wherein N is an integer; A detection resistor is set in the main circuit of the high and low voltage interlocking circuit; An acquisition module, used for acquiring the current current of the current high and low voltage interlocking circuit or the current voltage of the detection resistor; An identification module is used to determine a first loose resistance from the resistances on the first to Nth interface branches based on a preset current-loose resistance value mapping relationship according to the current current, so as to use the interface position corresponding to the first loose resistance as the loose interface position of the plug, or to determine a second loose resistance from the resistances on the first to Nth interface branches based on the current voltage of the detection resistor based on a preset voltage-loose resistance value mapping relationship, so as to use the interface position corresponding to the second loose resistance as the loose interface position of the plug.

2. The high and low voltage interlock circuit detection system according to claim 1, It is characterized in that The acquisition module comprises: A current collecting component provided in the main circuit of the high and low voltage interlocking circuit; Alternatively, a voltage collection component is provided in the main circuit of the high and low voltage interlocking circuit.

3. The high and low voltage interlock circuit detection system according to claim 2, It is characterized in that The voltage acquisition component comprises: A voltage sensor is connected in parallel with the detection resistor.

4. The high and low voltage interlock circuit detection system according to claim 2, It is characterized in that The current collecting component is a current sensor.

5. The high and low voltage interlock circuit detection system according to claim 1, It is characterized in that The preset current-loose resistance value mapping relationship is generated by a plurality of current values ​​and a loose resistance value corresponding to each current value, wherein the plurality of current values ​​are obtained when a plug of at least one of the first to Nth interfaces is loose.

6. The high and low voltage interlock circuit detection system according to claim 1, It is characterized in that The preset voltage-loose resistance value mapping relationship is generated by a plurality of voltage values ​​and a loose resistance value corresponding to each voltage value, wherein the plurality of voltage values ​​are obtained when a plug of at least one of the first to Nth interfaces is loose.

7. A high and low voltage interlocking circuit detection method, It is characterized in that The following steps are involved: Identify the circuit type of the current high and low voltage interlocking circuit; If the circuit type is the first type, the current current of the current high and low voltage interlocking circuit is collected, and according to the current current, the first loose resistance is determined from a preset current-loose resistance value mapping relationship; if the circuit type is the second type, the current voltage of the detection resistor in the main circuit of the current high and low voltage interlocking circuit is collected, and according to the current voltage of the detection resistor, the second loose resistance is determined from a preset voltage-loose resistance value mapping relationship; The plug loose interface position is determined according to the first loose resistance or the second loose resistance.

8. The method according to claim 7, It is characterized in that Before determining the first loosening resistance from a preset current-resistance value mapping relationship according to the current current, the method further includes: Acquire multiple current values ​​and a loose resistance value corresponding to each current value when a plug of at least one of the first to Nth interfaces is loose; The preset current-loosening resistance value mapping relationship is generated according to the multiple current values ​​and the loosening resistance value corresponding to each current value.

9. The method according to claim 7, It is characterized in that Before determining the first loose resistance from a preset voltage-resistance value mapping relationship according to the current voltage, the method further includes: Acquire multiple voltage values ​​and a loose resistance value corresponding to each voltage value when a plug of at least one of the first to Nth interfaces is loose; The preset voltage-loosening resistance value mapping relationship is generated according to the multiple voltage values ​​and the loosening resistance value corresponding to each voltage value.

10. A vehicle, It is characterized in that include: A high and low voltage interlock circuit detection system as described in any one of claims 1 to 6.

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