CN113917368A - High-voltage interlocking detection circuit, method and device - Google Patents
High-voltage interlocking detection circuit, method and device Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
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Abstract
The application discloses a high-voltage interlocking detection circuit, a method and a device, wherein the circuit comprises N high-voltage interlocking branches and 1 detection circuit, wherein N is a positive integer greater than or equal to 1, the detection circuit comprises a first resistor R0, a second resistor R1 and a power supply, and the first resistor R0 is connected with the second resistor R1 in series; when all the high-voltage interlocking branches are normally connected, the resistor in each high-voltage interlocking branch is connected in parallel with the two ends of the second resistor R1 through the corresponding high-voltage connectors; after the kth high-voltage interlocking branch circuit is disconnected, the kth to nth high-voltage interlocking branch circuits are all disconnected with the second resistor R1, wherein K is a positive integer greater than or equal to 1 and less than or equal to N. Based on the circuit, when any high-voltage interlocking branch is opened, the voltage value detected at the two ends of the second resistor R1 is unique, so that the disconnected high-voltage interlocking branch can be quickly positioned.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a high-voltage interlocking detection circuit, method and device.
Background
A method for monitoring the integrity of a high voltage circuit by using a low voltage signal in a high voltage interlock, referring to fig. 1, in fig. 1, a thick line represents a high voltage wire, a thin line represents a low voltage detection line, and high voltage plugs are arranged at two sides of a disconnection position, when a high voltage connector is connected, the low voltage detection line forms a complete circuit, and when the high voltage connector is disconnected, the low voltage detection line circuit is also disconnected. Therefore, whether the high-voltage plug is in good contact can be judged by detecting whether the low-voltage circuit is disconnected.
Based on the characteristics, the high-voltage interlocking technology is generally applied to the field of new energy automobiles, and aims to monitor whether each high-voltage connector is normally connected or not and guarantee the normal work of a high-voltage system. At present, the high-voltage interlocking technical scheme widely applied in the market is to perform high-voltage interlocking detection through a low-voltage circuit in series, specifically, an automobile controller sends a specific voltage or current signal to the low-voltage circuit in series, detects the signal at a receiving end of the low-voltage circuit, and judges whether all high-voltage connectors are connected well according to the detection result.
Above-mentioned scheme can judge whether there is the condition of disconnection in the high-voltage connector, but when having a plurality of high-voltage plug connectors to establish ties in the low pressure detection return circuit, if the condition of disconnection appears, then can't judge concrete which connector disconnection rapidly, need the professional to investigate one by one, and efficiency is not high.
Disclosure of Invention
The application provides a high-voltage interlocking detection circuit, a method and a device, which correspond to a unique resistance value after any high-voltage interlocking branch is disconnected, so that the disconnected high-voltage interlocking branch can be quickly positioned.
In a first aspect, the present application provides a high-voltage interlock detection circuit, which includes N high-voltage interlock branches and 1 detection circuit, where N is a positive integer greater than or equal to 1, the detection circuit includes a first resistor R0, a second resistor R1, and a power supply, and the first resistor R0 is connected in series with the second resistor R1;
when all the high-voltage interlocking branches are normally connected, the resistor in each high-voltage interlocking branch is connected in parallel with the two ends of the second resistor R1 through the corresponding high-voltage connectors;
when the Kth high-voltage interlocking branch circuit is disconnected, the Kth to Nth high-voltage interlocking branch circuits are all disconnected with the second resistor R1, wherein K is a positive integer which is greater than or equal to 1 and less than or equal to N.
Based on the detection circuit, when all the high-voltage interlocking branches are normally connected, the resistor in each high-voltage interlocking branch is connected in parallel to two ends of the second resistor R1 through the high-voltage connector in the branch, and after any one high-voltage interlocking branch is disconnected, the disconnected high-voltage interlocking branch and the high-voltage interlocking branch behind the disconnected high-voltage interlocking branch are disconnected with the second resistor R1. Because the more the resistors connected in parallel, the smaller the equivalent resistance, therefore, each high-voltage interlocking branch circuit corresponds to a unique resistance value after being disconnected, and further, the accurate positioning of the disconnected high-voltage interlocking branch circuits can be realized.
Optionally, the high-voltage interlocking branch includes a high-voltage interlocking resistor and a high-voltage connector, and the high-voltage interlocking resistor is connected in series with the high-voltage connector.
Preferably, in the two high-voltage interlocking branches, the high-voltage interlocking resistor is arranged in any one of the two high-voltage interlocking branches, and the other high-voltage interlocking branch is a common branch without the high-voltage interlocking resistor.
Through the scheme, the number of the preset detection voltages can be reduced, so that the difference value between every two detection voltages is larger, and the detection reliability is improved.
Optionally, when the high-voltage connector in the common branch is disconnected, a voltage value across the second resistor R1 is the same as a voltage value across the second resistor R1 after the high-voltage connector in the branch following the common branch is disconnected.
Preferably, after the nth high-voltage interlocking branch is disconnected, the difference between the voltage value at the two ends of the second resistor R1 and the voltage value at the two ends of the remaining high-voltage interlocking branches is greater than a preset threshold.
Through the scheme, when any high-voltage interlocking branch is disconnected, the voltage across the second voltage value R1 can obviously change, so that the possibility of false alarm faults is reduced.
In a second aspect, the present application provides a high voltage interlock detection method, based on the above circuit, the method includes:
detecting the voltage value of the two ends of the second resistor R1;
and determining a disconnected first high-voltage interlocking branch circuit in the N high-voltage interlocking branch circuits according to the voltage value.
Further, the detecting the voltage value across the second resistor R1 includes:
determining a detection position between a first resistor R0 and the second resistor R1;
the voltage value across the second resistor R1 is detected at the detection position.
Further, according to the voltage value, a first high-voltage interlocking branch which is disconnected is determined in the N high-voltage interlocking branches, and the method comprises the following steps:
inquiring in a preset database to obtain a first preset voltage value consistent with the voltage value, wherein the preset database comprises a plurality of different preset voltage values and high-voltage connector position information corresponding to each preset voltage value;
and determining the position of the disconnected high-voltage connector according to the first preset voltage value.
In a third aspect, the present application provides a high voltage interlock detection apparatus, the apparatus comprising:
the detection module is used for detecting the voltage value at two ends of the second resistor R1;
and the positioning module is used for determining a disconnected first high-voltage interlocking branch circuit in the N high-voltage interlocking branch circuits according to the voltage value.
Further, the positioning module is specifically configured to:
inquiring in a preset database to obtain a first preset voltage value consistent with the voltage value, wherein the preset database comprises a plurality of different preset voltage values and high-voltage connector position information corresponding to each preset voltage value;
and determining the position of the disconnected high-voltage connector according to the first preset voltage value.
Based on the high-voltage interlocking detection circuit that this application provided, when all high-voltage interlocking branch roads are normally connected, the resistance in every high-voltage interlocking branch road is parallelly connected at second resistance R1 both ends through the high-voltage connector in this branch road, and after any one grade high-voltage interlocking branch road disconnection, the high-voltage interlocking branch road that disconnection and behind the high-voltage interlocking branch road of disconnection all with second resistance R1 disconnection. The more the resistors connected in parallel, the smaller the equivalent resistance, so that each high-voltage interlocking branch circuit corresponds to a unique resistance value after being disconnected, and the quick positioning of the disconnected high-voltage interlocking branch circuits can be realized.
Meanwhile, only one of the two high-voltage interlocking branches close to each other is provided with the high-voltage interlocking resistor, so that the number of preset detection voltages can be reduced, the difference value between every two detection voltages is larger, and the detection reliability is improved.
In addition, after the nth high-voltage interlocking branch is disconnected, the voltage value at two ends of the corresponding second resistor R1 is obviously greater than the voltage values corresponding to the disconnection of other high-voltage interlocking resistors, so that when any one high-voltage interlocking branch is disconnected, the voltage at two ends of the second voltage value R1 is obviously changed, and the possibility of false alarm fault is reduced.
For each of the second aspect and the third aspect and possible technical effects of each aspect, reference is made to the above description of the possible technical effects of the first aspect or each possible solution of the first aspect, and repeated descriptions are omitted here.
Drawings
FIG. 1 is a schematic diagram of a high voltage interlock principle provided herein;
FIG. 2 is a schematic diagram of a high voltage interlock fault detection apparatus provided herein;
FIG. 3 is a schematic diagram of a high voltage interlock detection circuit provided herein;
FIG. 4 is a schematic diagram of a high voltage interlock branch circuit provided herein;
fig. 5 is a schematic structural diagram of a high-voltage interlock detection device provided in the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied to apparatus embodiments or system embodiments. It should be noted that "a plurality" is understood as "at least two" in the description of the present application. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. A is connected with B and can represent: a and B are directly connected and A and B are connected through C. In addition, in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not intended to indicate or imply relative importance nor order to be construed.
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
At present, in the field of new energy vehicles, in order to ensure normal operation of a high-voltage system, whether a high-voltage connector is normally connected or not is usually monitored, a common method is that a vehicle controller sends a specific voltage or current signal to a low-voltage detection circuit connected in series, the signal is detected at a receiving end of the low-voltage detection circuit, and whether all high-voltage connectors are connected or not is judged according to a detection result.
Above-mentioned scheme can judge whether there is the condition of disconnection in the high-voltage connector, but when having a plurality of high-voltage plug connectors to establish ties in the low pressure detection return circuit, if the condition of disconnection appears, then can't judge concrete which connector disconnection rapidly, need the professional to investigate one by one, and efficiency is not high.
Based on the above situation, as shown in fig. 2, in a high-voltage interlock fault detection apparatus in the prior art, in fig. 2, two ends of each high-voltage connector are connected in parallel with a high-voltage interlock resistor, when all the high-voltage connectors are normally connected, the resistance value in the high-voltage interlock circuit is only R0, and when any one of the high-voltage connectors is disconnected, the parallel resistor of the high-voltage connector is connected in series in the high-voltage interlock circuit.
In fig. 2, the resistance values of the high-voltage interlocking resistors are different, the resistance values of any plurality of high-voltage interlocking resistors after being connected in series are different, and the resistance values of any plurality of high-voltage interlocking resistors after being connected in series are different from the resistance values of the high-voltage interlocking resistors, so that when a certain high-voltage connector is disconnected, the high-voltage interlocking detection circuit judges the position of the failed high-voltage connector according to the detected resistance values by detecting the resistance values at the two ends of the high-voltage interlocking loop.
In the above scheme, in order to ensure that the above scheme can accurately detect the position of the disconnected high-voltage connector, it is necessary to ensure that the resistance values of the resistors are different from each other and that the resistance values of any plurality of resistors are different after being connected in series. Therefore, when the high-voltage interlocking detection circuit is designed, if the number of the resistors connected into the high-voltage interlocking detection circuit is increased, the resistance value of each resistor is difficult to determine, and it is difficult to ensure that the resistance value of the connected detection circuit is unique after any high-voltage connector is disconnected.
In order to solve the above problem, the present application provides a high-voltage interlock detection circuit, when all the high-voltage interlock branches are normally connected, a resistor in each high-voltage interlock branch is connected in parallel across the second resistor R1 through a high-voltage connector in the branch; when any one of the high-voltage interlocking branches is disconnected, the disconnected high-voltage interlocking branch and each high-voltage interlocking branch after the level of the disconnected high-voltage interlocking branch are disconnected with the second resistor R1. Since the more resistors are connected in parallel, the smaller the equivalent resistance, so that the possibility of repetition does not exist, and therefore, each connector is disconnected and corresponds to a unique resistance value.
As shown in fig. 3, the high-voltage interlock detection circuit provided in the embodiment of the present application includes N high-voltage interlock branches and 1 detection circuit, where N is a positive integer greater than or equal to 1, the detection circuit includes a first resistor R0, a second resistor R1, and a power supply, and the first resistor R0 is connected in series with the second resistor R1;
when all the high-voltage interlocking branches are normally connected, the resistor in each high-voltage interlocking branch is connected in parallel with the two ends of the second resistor R1 through the corresponding high-voltage connectors;
when the Kth high-voltage interlocking branch circuit is disconnected, the Kth to Nth high-voltage interlocking branch circuits are all disconnected with the second resistor R1, wherein K is a positive integer which is greater than or equal to 1 and less than or equal to N.
In the above circuit, when all the high-voltage interlocking branches are normally connected, the resistor in each high-voltage interlocking branch is connected in parallel to two ends of the second resistor R1 through the high-voltage connector in the branch, the more the resistors connected in parallel, the smaller the equivalent resistance of all the resistors connected in parallel, and after the kth high-voltage interlocking branch is disconnected, the kth to nth high-voltage interlocking branches are all disconnected from the second resistor R1, so that after any one high-voltage interlocking branch is disconnected, all the equivalent resistance values of the resistors connected in parallel, including the second resistor R1, are unique.
Further, the voltage value at the two ends of the second resistor R1 can be calculated according to the equivalent resistance value of the parallel resistor after any high-voltage interlocking branch is disconnected, and the specific calculation formula is as follows:
in equation (1), V is the voltage across the second resistor R1, RdxThe equivalent resistance of all parallel resistors including the second resistor R1, and E is the power supply potential in the detection circuit.
According to the formula (1), after any one high-voltage interlocking branch is disconnected, the corresponding equivalent resistance value R is obtaineddxIs unique and therefore the voltage across the second resistor R1 is also unique.
Preferably, in order to enable voltage values detected at two ends of the second resistor R1 to be uniformly distributed and to be adapted to the analog quantity accuracy of the voltage detection device when any one of the high-voltage interlocking branches is disconnected, the resistance values of the resistors in the disconnected high-voltage interlocking branch may be determined according to a preset voltage value, and the specific method includes the following steps:
firstly, presetting the voltage values at two ends of a second resistor R1 after any high-voltage interlocking branch is disconnected according to the analog quantity precision of voltage detection equipment;
for example, when the analog quantity accuracy of the voltage detection device is ± 25mV, after the 1 st, 2 nd, 3 rd, … … th and nth high-voltage interlocking branches are disconnected, the voltages respectively corresponding to the high-voltage interlocking branches are 4.975, 4.925, 4.875 and … …, and on the premise of ensuring the accuracy, the number of the set high-voltage interlocking branches can reach 100.
Next, determining a resistance value in any disconnected high-voltage interlocking branch according to a preset voltage value at two ends of the second resistor R1 after any high-voltage interlocking branch is disconnected, wherein a specific calculation formula of each resistor is as follows:
in the formula (2), Vs1The preset voltage value of the two ends of the second resistor R1 after the 1 st high-voltage interlocking branch is disconnected is shown;
in the formula (3), Vs2The preset voltage value at two ends of the second resistor R1 is shown after the 2 nd high-voltage interlocking branch is disconnected, and R2 shows the resistance value in the 1 st high-voltage interlocking branch;
in the formula (4), VsiAnd after the ith high-voltage interlocking branch is disconnected, the preset voltage value at two ends of the second resistor R1 is shown, Ri shows the resistance value in the (i-1) th high-voltage interlocking branch, wherein i is a positive integer greater than or equal to 2.
According to the resistance value in each high-voltage interlocking branch determined in the above manner, under the condition that any high-voltage interlocking branch is disconnected, the voltage values detected at the two ends of the second resistor R1 are uniformly distributed, the condition that the corresponding detection voltage values are close when any two high-voltage interlocking branches are disconnected does not occur, and the detected voltage values are adapted to the analog quantity precision of the voltage detection equipment.
Preferably, when the nth high-voltage interlock branch is disconnected, a difference between a detected voltage value at two ends of the second resistor R1 and a detected voltage value corresponding to the remaining high-voltage interlock branches after being disconnected is greater than a preset threshold.
Through the scheme, when any high-voltage interlocking branch is disconnected, the detection voltage at the two ends of the second resistor R1 can obviously change, so that the possibility of false alarm faults is reduced.
Optionally, the resistance values of all the high-voltage interlock branches may be set to be equal to the resistance value of the second resistor R1, and the voltage value detected at the two ends of the second resistor R1 is:
in the formula (5), VjiIndicating the detected voltage value across the second resistor R1 after the ith high-voltage interlock branch is disconnected.
Optionally, referring to fig. 4, in fig. 4, the high-voltage interlocking branch includes a high-voltage interlocking resistor and a high-voltage connector, where the high-voltage interlocking resistor is connected in series with the high-voltage connector.
As a preferable scheme, when any two high-voltage interlocking branches are close to each other, referring to fig. 4, in the two high-voltage interlocking branches, if a high-voltage interlocking resistor is provided in any one of the high-voltage interlocking branches, the other high-voltage interlocking branch is a common branch without the high-voltage interlocking resistor.
Optionally, when the high-voltage connector in the common branch is disconnected, a voltage value across the second resistor R1 is the same as a voltage value across the second resistor R1 after the high-voltage connector in the branch following the common branch is disconnected.
For example, when the 1 st high-voltage interlocking branch is closer to the 2 nd high-voltage interlocking branch, the high-voltage connectors in the 1 st high-voltage interlocking branch are connected in series with the high-voltage interlocking resistor, and the 2 nd high-voltage interlocking branch is a common branch, in this case, when the high-voltage connectors in the 2 nd high-voltage interlocking branch are disconnected, the preset voltage values at the two ends of the second resistor R1 are the same as the corresponding preset voltage values when the high-voltage connectors in the 3 rd high-voltage interlocking branch are disconnected.
Based on the above-mentioned high-voltage interlock detection circuit, the present application provides a high-voltage interlock detection method, specifically includes:
first, a detection position is determined between the first resistor R0 and the second resistor R1;
then, the voltage value across the second resistor R1 is detected at the detection position;
further, based on the detected voltage value, a broken first high-voltage interlock branch is determined among the plurality of high-voltage interlock branches, specifically:
inquiring in a preset database to obtain a first preset voltage value consistent with the detected voltage value, wherein the preset database comprises a plurality of different preset voltage values and high-voltage connector position information corresponding to each preset voltage value;
and determining the position of the disconnected high-voltage connector according to the first preset voltage value obtained by inquiry.
In a possible application scenario, when a plurality of high-voltage interlocking branches are disconnected at the same time, a foremost high-voltage interlocking branch can be determined in the plurality of disconnected high-voltage interlocking branches each time, and in the embodiment of the present application, the sequence from the 1 st high-voltage interlocking branch to the nth high-voltage interlocking branch is from front to back.
For example, if the 2 nd, 5 th, and 8 th high-voltage interlocking branches are disconnected in the same high-voltage interlocking path, the 2 nd high-voltage interlocking branch that is detected to have a fault for the first time is detected, and after the 2 nd high-voltage interlocking branch is repaired, the 5 th high-voltage interlocking branch that is detected to have a disconnection can be detected, and the 8 th high-voltage interlocking branch can be detected in the same way.
Based on the same inventive concept, an embodiment of the present application further provides a high-voltage interlock detection device, as shown in fig. 5, which is a schematic structural diagram of the high-voltage interlock detection device in the present application, and as shown in fig. 5, the device includes:
the detection module 51 is used for detecting the voltage value at two ends of the second resistor R1;
and the positioning module 52 is configured to determine a disconnected first high-voltage interlocking branch from the N high-voltage interlocking branches according to the voltage value.
Further, the positioning module 52 is specifically configured to:
inquiring in a preset database to obtain a first preset voltage value consistent with the voltage value, wherein the preset database comprises a plurality of different preset voltage values and high-voltage connector position information corresponding to each preset voltage value;
and determining the position of the disconnected high-voltage connector according to the first preset voltage value.
Based on the high-voltage interlocking detection circuit, the high-voltage interlocking detection method and the high-voltage interlocking detection device, when all the high-voltage interlocking branches are normally connected, the resistor in each high-voltage interlocking branch is connected to two ends of the second resistor R1 in parallel through the high-voltage connector in the branch, and after any one high-voltage interlocking branch is disconnected, the disconnected high-voltage interlocking branch and the high-voltage interlocking branches behind the disconnected high-voltage interlocking branch are disconnected with the second resistor R1. The more the resistors connected in parallel, the smaller the equivalent resistance, so that each high-voltage interlocking branch circuit corresponds to a unique resistance value after being disconnected, and the disconnected high-voltage interlocking branch circuits can be positioned.
Meanwhile, only one of the two high-voltage interlocking branches close to each other is provided with the high-voltage interlocking resistor, so that the number of preset detection voltages can be reduced, the difference value between every two detection voltages is larger, and the detection reliability is improved.
In addition, after the nth high-voltage interlocking branch is disconnected, the voltage value at two ends of the corresponding second resistor R1 is obviously greater than the voltage values corresponding to the disconnection of other high-voltage interlocking resistors, so that when any one high-voltage interlocking branch is disconnected, the voltage at two ends of the second voltage value R1 is obviously changed, and the possibility of false alarm fault is reduced.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.
Claims (10)
1. A high-voltage interlocking detection circuit comprises N high-voltage interlocking branches and 1 detection circuit, wherein N is a positive integer greater than or equal to 1, and the high-voltage interlocking detection circuit is characterized by comprising a first resistor R0, a second resistor R1 and a power supply, wherein the first resistor R0 is connected with the second resistor R1 in series;
when all the high-voltage interlocking branches are normally connected, the resistor in each high-voltage interlocking branch is connected in parallel with the two ends of the second resistor R1 through the corresponding high-voltage connectors;
when the Kth high-voltage interlocking branch circuit is disconnected, the Kth to Nth high-voltage interlocking branch circuits are all disconnected with the second resistor R1, wherein K is a positive integer which is greater than or equal to 1 and less than or equal to N.
2. The circuit of claim 1, wherein said high voltage interlock branch comprises a high voltage interlock resistor and a high voltage connector, said high voltage interlock resistor being connected in series with said high voltage connector.
3. The circuit of claim 2, wherein in the two high voltage interlock branches, if any one of the high voltage interlock branches is provided with the high voltage interlock resistor, the other high voltage interlock branch is a common branch which is not provided with the high voltage interlock resistor.
4. The circuit of claim 3 wherein the voltage across said second resistor R1 when said high voltage connector in said common branch is open is the same as the voltage across said second resistor R1 when said high voltage connector in a branch subsequent to said common branch is open.
5. The circuit as claimed in claim 1, wherein when the nth high-voltage interlock branch is disconnected, a difference between a voltage across the second resistor R1 and a voltage across the remaining high-voltage interlock branches is greater than a predetermined threshold value.
6. A high voltage interlock detection method based on the circuit of any one of claims 1-5, the method comprising:
detecting the voltage value of the two ends of the second resistor R1;
and determining a disconnected first high-voltage interlocking branch circuit in the N high-voltage interlocking branch circuits according to the voltage value.
7. The method of claim 6, wherein said detecting a voltage value across the second resistor R1 comprises:
determining a detection position between a first resistor R0 and the second resistor R1;
the voltage value across the second resistor R1 is detected at the detection position.
8. The method of claim 6, wherein said determining a first broken high voltage interlock branch among the N high voltage interlock branches based on said voltage value comprises:
inquiring in a preset database to obtain a first preset voltage value consistent with the voltage value, wherein the preset database comprises a plurality of different preset voltage values and high-voltage connector position information corresponding to each preset voltage value;
and determining the position of the disconnected high-voltage connector according to the first preset voltage value.
9. A high voltage interlock detection device, comprising:
the detection module is used for detecting the voltage value at two ends of the second resistor R1;
and the positioning module is used for determining a disconnected first high-voltage interlocking branch circuit in the N high-voltage interlocking branch circuits according to the voltage value.
10. The apparatus of claim 9, wherein the positioning module is specifically configured to:
inquiring in a preset database to obtain a first preset voltage value consistent with the voltage value, wherein the preset database comprises a plurality of different preset voltage values and high-voltage connector position information corresponding to each preset voltage value;
and determining the position of the disconnected high-voltage connector according to the first preset voltage value.
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