CN113945865A - High-voltage interlocking circuit, high-voltage wire harness detection method, vehicle and storage medium - Google Patents
High-voltage interlocking circuit, high-voltage wire harness detection method, vehicle and storage medium Download PDFInfo
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Abstract
The application relates to the technical field of high-voltage interlocking, and discloses a high-voltage interlocking loop, a high-voltage wire harness detection method, a vehicle and a medium, which are used for solving the problem that the existing high-voltage interlocking loop cannot accurately position the abnormality of a high-voltage connector. The high-pressure interlock loop section includes: the vehicle-mounted controller comprises a first excitation source circuit, a first resistance unit and a second resistance unit, wherein one end of the first resistance unit and one end of the second resistance unit are connected in common and connected to a first connection end of a high-voltage connection piece on a high-voltage component, the other end of the first resistance unit is connected to a vehicle body ground end, the other end of the second resistance unit and one end of the first excitation source circuit are connected in common and connected to a first detection end of a processor unit of the high-voltage component, the other end of the first excitation source circuit is connected to a first excitation end of the processor unit, and the processor unit is used for receiving a first feedback signal detected by the first detection end after sending the first excitation signal through the first excitation end and feeding the first feedback signal back to the vehicle controller through a bus.
Description
Technical Field
The application relates to the technical field of vehicle high-voltage interlocking, in particular to a high-voltage interlocking loop, a high-voltage wire harness detection method, a vehicle and a computer storage medium.
Background
A High Voltage InterLock (HVIL) loop is a type of circuit that uses small electrical signals to confirm the electrical integrity or continuity of entire High Voltage products, wires, connectors, etc. If there are high voltage components (i.e. high voltage components), all the high voltage components and the wiring harness connector are required to be installed in place, and no short circuit or open circuit occurs, the HVIL circuit is mainly used for detecting the above functions.
The inventor researches and discovers that at present, for the design of an HVIL loop, only a signal output circuit is used, only the output port of the last high-voltage component in the loop is detected, and an intermediate node of the loop is not detected, so that the problem cannot be located in detail when the HVIL loop has a problem.
Disclosure of Invention
Therefore, it is necessary to provide a high-voltage interlock circuit, a high-voltage wire harness detection method, a vehicle and a storage medium for solving the problem that the circuit cannot be positioned in detail when the circuit has a problem because the middle node of the high-voltage interlock circuit in the prior art is not detected.
A high-voltage interlocking loop comprises a first excitation source circuit, a first resistance unit and a second resistance unit, one end of the first resistance unit and one end of the second resistance unit are connected in common and the connected end is connected to the first connected end of the high-voltage connecting piece of the high-voltage component on the high-voltage component, the other end of the first resistance unit is connected to the ground end of the vehicle body, the other end of the second resistance unit is connected with one end of the first excitation source circuit in a common mode, the common connection end is connected to the first detection end of the processor unit of the high-voltage component, the other end of the first excitation source circuit is connected to a first excitation end of the processor unit, the processor unit is used for sending a first excitation signal through the first excitation end, and receiving a first feedback signal detected by the first detection end, and feeding the first feedback signal back to the vehicle control unit through a bus.
Furthermore, the first connection end and the second connection end of the high-voltage connection piece are in a short-circuit state.
Furthermore, the high-voltage interlocking circuit further comprises a third resistance unit, one end of the third resistance unit is connected to the joint end of the second resistance unit and the first excitation source circuit, and the other end of the third resistance unit is connected to the vehicle body ground end.
Further, the first excitation source circuit includes a fourth resistance unit, one end of the fourth resistance unit is connected to the common terminal of the second resistance unit and the third resistance unit, and the other end of the fourth resistance unit is connected to the first excitation terminal.
Furthermore, the first connecting end and the second connecting end of the high-voltage connecting piece are in a disconnected state, the high-voltage interlocking loop further comprises a second excitation source circuit, a fifth resistance unit and a sixth resistance unit, one end of the fifth resistance unit and one end of the sixth resistance unit are connected in common and the common connection end is connected to the second connection end, the other end of the fifth resistance unit is connected to the ground end of the vehicle body, the other end of the sixth resistance unit is connected with one end of the second excitation source circuit in a common mode, the common connection end of the sixth resistance unit and one end of the second excitation source circuit is connected to the second detection end of the processor unit, the other end of the second excitation source circuit is connected to a second excitation end of the processor unit, the processor unit is used for sending a second excitation signal through the second excitation end, and receiving a second feedback signal detected by the second detection end, and feeding the second feedback signal back to the vehicle control unit through the bus.
A vehicle comprising a high-pressure interlock circuit of any of the preceding claims.
A high-voltage wiring harness detection method is based on the high-voltage interlocking loop and comprises the following steps:
sending a start detection signal to a processor unit of the high-voltage component to enable the processor unit to send out the first excitation signal;
receiving a first feedback signal sent by the processor unit, wherein the first feedback signal is a signal detected by the processor unit through a first detection end;
and determining the wiring harness state of the high-voltage connector according to the first feedback signal.
Further, the determining the wiring harness state of the high-voltage connector according to the first feedback signal includes:
acquiring corresponding reference values of the first connecting end, wherein the corresponding reference values comprise a normal connection state reference value, a dead foot state reference value, a short-to-ground state reference value and a short-to-power battery state reference value of the first connecting end;
comparing the first feedback signal with one or more of the corresponding reference values;
and when one item mark corresponds to the reference value and meets the first feedback signal, confirming that the first connection end is in the wiring harness state of the target corresponding reference value.
Further, in combination with the above-mentioned scheme, the first connection end and the second connection end of the high-voltage connector are in a disconnected state, and a high-voltage wire harness detection method is also provided, the method includes:
sending a start detection signal to a processor unit of the high-voltage component to enable the processor unit to send out the first excitation signal and the second excitation signal;
receiving a first feedback signal and a second feedback signal sent by the processor unit, wherein the first feedback signal is a signal detected by the processor unit through a first detection end, and the second feedback signal is a signal detected by the processor unit through a second detection end;
and determining the wiring harness state of the high-voltage connector according to the first feedback signal and the second feedback signal.
One or more readable storage media storing a computer program, wherein the computer program when executed by a processor implements the steps of the high voltage harness detection method according to any one of the preceding claims.
In the above implementation scheme, a new high-voltage interlock loop is provided, when high-voltage wiring harness detection is required, the vehicle control unit may send a start detection signal by using the internal processor unit to notify the high-voltage component that the high-voltage wiring harness detection is possible, and then after the processor unit inside the high-voltage component receives the start detection signal, the processor unit may send a first excitation signal by using the first excitation terminal, so that the first excitation source circuit generates a first excitation source, the first excitation source generated by the first excitation source circuit is output to the second resistance unit, and then the processor unit may receive a first feedback signal detected by the first detection terminal, because the first detection terminal of the processor unit is connected with the other terminal of the second resistance unit and one terminal of the first excitation source circuit, the wiring harness state of the high-voltage connecting member can be reflected by using the first feedback signal detected by the first detection terminal, therefore, after the high-voltage part feeds the first feedback signal back to the vehicle control unit through the bus, the vehicle control unit can accurately know the wiring harness condition of the high-voltage connecting piece corresponding to the high-voltage part according to the first feedback signal, and each high-voltage part in the vehicle body can adopt the scheme, so that the vehicle control unit can accurately and comprehensively know which high-voltage part's high-voltage wiring harness has the connection conditions of poor contact and the like, and the wiring harness problem of the abnormal position is accurately positioned.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a high pressure interlock circuit including a single high pressure component according to an embodiment of the subject application;
FIG. 2 is a schematic diagram of a high-pressure interlock loop including a plurality of high-pressure components according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a high pressure joint according to an embodiment of the present application;
FIG. 4 is another schematic structural view of a high pressure joint according to an embodiment of the subject application;
FIG. 5 is another schematic diagram of a high voltage interlock circuit including a single high voltage component according to an embodiment of the subject application;
FIG. 6 is a schematic diagram of another configuration of a high pressure interlock loop incorporating a single high pressure component in an embodiment of the present disclosure;
FIG. 7 is another schematic diagram of a high voltage interlock circuit including a plurality of high voltage components according to an embodiment of the present disclosure;
FIG. 8 is a schematic diagram of a high pressure interlock loop including a plurality of high pressure components according to a second embodiment of the present disclosure;
figure 9 is a schematic diagram of a high pressure interlock circuit including multiple high pressure components according to three embodiments of the subject application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In some embodiments of the present application, the present application is specifically addressed by taking advantage of the feature that the high voltage component itself has a processor unit inside. The high-voltage components mentioned in the embodiments of the present application include, but are not limited to, vehicle body high-voltage components such as a Positive Temperature coefficient heater (PTC), an engine Electronic stability system (ECP), and the internal processor units of these high-voltage components may be units such as a CPU, a DSP processor, and the like, and are not limited specifically. Based on the above features, in some embodiments of the present application, a new high-voltage interlock circuit is provided, which is described in detail below.
Scheme one
In an embodiment of the present application, as shown in fig. 1, a high-voltage interlock loop is provided, where the high-voltage interlock loop includes a first excitation source circuit 11, a first resistance unit 12, a second resistance unit 13, one end of the first resistance unit 12 and one end of the second resistance unit 13 are connected in common, the common end is connected to a first connection end of a high-voltage connector 15 on a high-voltage component 14, the other end of the first resistance unit 12 is connected to a vehicle body ground end, the other end of the second resistance unit 13 and one end of the first excitation source circuit 11 are connected in common, the common end is connected to a first detection end of a processor unit 141 of the high-voltage component 14, the other end of the first excitation source circuit 11 is connected to a first excitation end of the processor unit 141, and the first excitation source circuit 11 is configured to generate a first excitation source circuit according to a first excitation source signal.
Based on the above circuit relationship, it can be seen that the processor unit 141 is configured to receive the first feedback signal detected by the first detection end after the first excitation end sends the first excitation signal, and feed back the received first feedback signal to the vehicle controller 20 through the bus, and specifically, the processor unit 141 inside the high-voltage component 14 feeds back the first feedback signal to the processor unit of the vehicle controller 20 through the bus.
In this embodiment, it can be seen that, when the high-voltage harness detection is required, the vehicle control unit 20 may send a start detection signal to the internal processor unit 141 of the high-voltage component 14 by using the internal processor unit to notify that the high-voltage component 14 can perform the high-voltage harness detection, after the processor unit 141 inside the high-voltage component 14 receives the start detection signal, the processor unit 141 may send a first excitation signal through the first excitation terminal, so that the first excitation source circuit 11 generates a first excitation source, the first excitation source generated by the first excitation source circuit 11 is output to the second resistance unit 13, and then the processor unit 141 may receive a first feedback signal detected by the first detection terminal, since the first detection terminal of the processor unit 141 is connected to the other end of the second resistance unit 13 and one end of the first excitation source circuit 11, the harness state of the high-voltage connector 15 can be reflected by the first feedback signal detected by the first detection terminal, therefore, after the high-voltage component 14 feeds back the first feedback signal to the vehicle controller 20 through the bus, the vehicle controller 20 can accurately know the wiring harness condition of the high-voltage connecting piece 15 corresponding to the high-voltage component 14 according to the first feedback signal, and since each high-voltage component in the vehicle body can adopt the above scheme, the vehicle controller 20 can accurately and comprehensively know which high-voltage wiring harness of the high-voltage component has poor contact and other connection conditions.
In some embodiments, as shown in fig. 1, the high voltage component 14 may further include, in addition to the processor unit 141, a first excitation source circuit 11 and a second resistance unit 13, which are not limited in particular.
For example, as shown in fig. 2, fig. 2 is a schematic connection diagram in the case of a plurality of high-voltage components implemented based on the above-mentioned embodiment, fig. 2 is illustrated by taking 3 high-voltage components as an example, fig. 2 includes a high-voltage component 1, a high-voltage component 2 and a high-voltage component 3, each high-voltage component includes a processor unit inside, and a corresponding high-voltage interlock circuit is provided for each high-voltage component, the processor unit of the vehicle controller can simultaneously or respectively send an activation detection signal to the processor units inside the high- voltage components 1, 2 and 3, so that the processor units inside the high- voltage components 1, 2 and 3 all send corresponding first excitation signals in response to the activation detection signal, and then the processor units inside the high- voltage components 1, 2 and 3 can utilize the first feedback signals detected by their corresponding first detection terminals, and the first feedback signals fed back by the processor units in the high-voltage part 1, the high-voltage part 2 and the high-voltage part 3 respectively can be utilized to analyze the wire harness states of the high-voltage connectors of the piezoelectric device 1, the high-voltage part 2 and the high-voltage part 3 for the vehicle controller.
It can be seen that in the embodiment that this application provided, because each high-voltage component can carry out the multiple spot fault detection simultaneously or parallelly for vehicle control unit can discern the pencil state of the high-pressure union piece of a plurality of high-voltage components fast, including holding end connection condition etc. in addition, based on the high-pressure interlocking return circuit that this application embodiment provided, need not to utilize extra pencil series connection between the high-pressure union piece of high-voltage component, make holistic high-pressure interlocking return circuit pencil shorten, arrange more simply, convenient, also can reduce use cost.
It is understood that, based on the above-described embodiments, the present application has different embodiments depending on the state of communication of both terminal ends of the high-voltage component. Two embodiments will be described below.
First embodiment of the invention
In this embodiment, the first terminal and the second terminal of the high-voltage terminal are in a short-circuit state, as shown in figure 3, FIG. 3 is a schematic structural diagram of a high-pressure connector, which includes a male high-pressure connector and a female high-pressure connector, the female high-pressure connector includes contacts A 'and B', A 'and B' in the female connector are in a connected state, the male high-pressure connector includes a first terminal A and a second terminal B, the first terminal A is used for contacting with the contact A 'and the second terminal B is used for contacting with the contact B' when the female high-pressure connector and the male high-pressure connector are mated, in the first embodiment of the above-mentioned solution, the first connection end a and the second connection end B of the high-pressure connection member are in a connected state, so that, because the first connecting end and the second connecting end of the high-voltage connecting piece are in a short-circuit state, the first connecting end and the second connecting end are the same wire harness, and the wire harness states of the first connecting end and the second connecting end of the high-voltage connecting piece, such as the wire harness states, can be directly detected by utilizing the embodiment.
Second embodiment of the invention
In a second embodiment of this embodiment, the two terminals of the high-voltage connector on the high-voltage component are in a disconnected state, as shown in fig. 4, fig. 4 is another schematic structural diagram of the high-voltage connector in the embodiment of this application, and includes a high-voltage connector male head and a high-voltage connector female head, the high-voltage connector female head includes contacts a 'and B', a 'and B' in the female head are in a connected state, the high-voltage connector male head includes a first terminal a and a second terminal B, when the high-voltage connector female head and the high-voltage connector male head are mated, the first terminal a is used for contacting with the contact a ', the second terminal B is used for contacting with the contact B', when the second embodiment of the above-mentioned embodiment is adopted, as shown by the forks in the first terminal a and the second terminal B in fig. 4, the first terminal a and the second terminal B of the high-voltage connector are in a disconnected state, and the controller can know the state of the second wiring harness B of the high-voltage connector by using the first feedback signal as a whole, but the wiring harness state of the first terminal a cannot be known.
Therefore, in the second embodiment of the present invention, the wire harness state of one of the connected high-voltage connectors can be known for a certain high-voltage component, that is, the vehicle control unit can know the wire harness state of one of the high-voltage connectors of all the high-voltage components, but compared with the prior art, more comprehensive and more accurate detection has been achieved, but for further comprehensive purposes, in this embodiment, with reference to fig. 4 and 5, when the first connection end a and the second connection end B are in the disconnected state, based on the same detection idea of the second connection end B, a corresponding loop is further configured on the second connection end B for detecting the first connection end a, that is, in this embodiment, as shown in fig. 5, the first connection end and the second connection end of the high-voltage connector 15 are in the disconnected state, and the high-voltage interlock loop further includes a second excitation source circuit 21, The high-voltage component 14 comprises a fifth resistance unit 22 and a sixth resistance unit 23, wherein one end of the fifth resistance unit 22 and one end of the sixth resistance unit 23 are connected in common, and the connected end is connected to the second connected end, the other end of the fifth resistance unit 22 is connected to the ground end of the vehicle body, the other end of the sixth resistance unit 23 and one end of the second excitation source circuit 23 are connected in common, and the connected end is connected to the second detection end of the processor unit, the other end of the second excitation source circuit 23 is connected to the second excitation end of the processor unit of the high-voltage component 14, and the processor unit of the high-voltage component 14 is configured to receive a second feedback signal detected by the second detection end after sending a second excitation signal through the second excitation end, and feed the second feedback signal back to the processor unit of the vehicle controller 20 through a bus. Therefore, when the scheme is adopted, the vehicle control unit can comprehensively know the wiring harness connection state of the second connection end A and the second connection end B of the high-voltage connector by using the first feedback signal and the second feedback signal, and can more comprehensively and accurately know the wiring harness state of the high-voltage connector 15.
It should be noted that, according to the above-mentioned solutions, two implementation manners are provided in an embodiment of the present application, and are respectively applied to a scenario where the first connection end and the first connection end of the high-voltage connector are disconnected, and a situation where the first connection end and the first connection end of the high-voltage connector are connected, so that the two implementation manners have strong pertinence. It should be noted that, in the embodiment of the present application, in a scenario where the first terminal and the first terminal are connected, only one half of the circuit structure (see the difference between fig. 1 and fig. 5) is needed, and the cost is relatively lower than that in a scenario where the first terminal and the first terminal are disconnected. However, in any of the above scenarios, compared with the prior art, the wiring harness state can be detected by means of interaction between the processor unit inside the high-voltage component and the vehicle control unit, so that the detection comprehensiveness of the high-voltage component of the vehicle body can be effectively improved, the wiring harness state of the high-voltage connecting piece of a certain high-voltage component can be more accurately positioned, and the detection is more comprehensive and accurate.
It should be noted that the same driver source circuit can be used for the first driver source circuit and the second driver source circuit, and the embodiment of the present application is not limited thereto, please refer to fig. 6, in some embodiments of the present application, the first driving source circuit is implemented by using the fourth resistance unit 11, that is, the fourth resistance unit 11 is used as a pull-up resistance to implement a driving source, one end of the fourth resistance unit 11 is connected to the other end of the second resistance unit 13, the other end of the fourth resistance unit 11 is connected to the first driving end of the processor unit of the high-voltage component, and in addition, the first detecting end is used for detecting the first feedback signal, in some embodiments of the present application, the high-voltage interlock loop further includes a third resistance unit 16, one end of the third resistance unit 16 is connected to the common end of the second resistance unit 13 and the fourth resistance unit 11, and the other end is connected to the vehicle body ground.
Similarly, in some embodiments of the present application, the second excitation source circuit includes a seventh resistance unit 21, that is, the seventh resistance unit 21 is used as a pull-up resistance to realize the excitation source, one end of the seventh resistance unit 21 is connected to the other end of the sixth resistance unit 23, the other end of the seventh resistance unit 21 is connected to the second excitation end of the processor unit of the high-voltage component, and in addition, the second detection end is used to facilitate detecting the second feedback signal.
It should be noted that, in some embodiments of the present application, the resistance unit may be implemented by using a suitable single or multiple resistors, and is not limited specifically.
For example, a circuit diagram in which two connection terminals of the high-voltage component are disconnected in the case of three high-voltage components is described here, and referring to fig. 7, a high-voltage component 2, a high-voltage component 3, and a high-voltage component are provided, in which:
for the high-voltage component 2, the first resistor unit is a resistor R2_5, the second resistor unit is a resistor R2_1, the fourth resistor unit is R2_3, the third resistor unit is a resistor R2_7, the fifth resistor unit is a resistor R2_6, the sixth resistor unit is a resistor R2_2, the seventh resistor unit is a resistor R2_4, the eighth resistor unit is a resistor R2_8, the connection end 8 is a first connection end, and the connection end 7 is a second connection end.
For the high-voltage component 3, the first resistor unit is a resistor R3_5, the second resistor unit is a resistor R3_1, the fourth resistor unit is a resistor R3_3, the third resistor unit is a resistor R3_7, the fifth resistor unit is a resistor R3_6, the sixth resistor unit is a resistor R3_2, the seventh resistor unit is a resistor R3_4, the eighth resistor unit is a resistor R3_8, the connection terminal 6 is a first connection terminal, and the connection terminal 5 is a second connection terminal, and specific connection relationships can be referred to fig. 6 and will not be described in detail herein. One end of the resistor R3_3 is connected to the first excitation end I/O _3_1 of the processor unit MCU3, one end of the resistor R3_4 is connected to the second excitation end I/O _3_2 of the processor unit MCU3, the first detection end ADC _3_1 of the processor unit MCU3 is connected to the common end of the resistor R3_1, the resistor R3_3 and the resistor R3_7, the second detection end ADC _3_2 of the processor unit MCU3 is connected to the common end of the resistor R3_2, the resistor R3_4 and the resistor R3_8, and the processor unit MCU3 performs bus communication with the bus transceiver 1 of the processor unit 1 of the vehicle controller through the bus transceiver MU 3 in the high-voltage component 3, specifically, CAN use a CAN LIN or other bus.
For the high-voltage component 4, the first resistor unit is a resistor R4_5, the second resistor unit is a resistor R4_1, the fourth resistor unit is a resistor R4_3, the third resistor unit is a resistor R4_7, the fifth resistor unit is a resistor R4_6, the sixth resistor unit is a resistor R4_2, the seventh resistor unit is a resistor R4_4, the eighth resistor unit is a resistor R4_8, the connection terminal 4 is a first connection terminal, and the connection terminal 3 is a second connection terminal, and specific connection relationships can be referred to fig. 6 and will not be described in detail herein. One end of the resistor R4_3 is connected to the first excitation end I/O _4_1 of the processor unit MCU4, one end of the resistor R4_4 is connected to the second excitation end I/O _4_2 of the processor unit MCU4, the first detection end ADC _4_1 of the processor unit MCU4 is connected to the common end of the resistor R4_1, the resistor R4_3 and the resistor R4_3, the second detection end ADC _4_2 of the processor unit MCU4 is connected to the common end of the resistor R4_2, the resistor R4_4 and the resistor R4_8, and the processor unit MCU4 performs bus communication with the bus transceiver 1 of the processor unit 1 of the vehicle controller through the bus transceiver MU 4 in the high-voltage component 4, specifically, CAN use a CAN LIN or other bus.
Here, taking the high-voltage component 2 in fig. 6 as an example, how to determine the wiring harness state of the high-voltage component on the high-voltage component is described in detail below. After each high-voltage component is electrified and initialized, the wiring harness state of a high-voltage connector is detected, the wiring harness state of the high-voltage connector is pulled up, the pulling-up voltage is V2_1, the wiring harness state of the high-voltage connector can be judged according to the truth table 1 of the following table, it is to be further explained that the precondition established by the following table 1 is that the connector end (namely, a first connection end and a second connection end, and for the high-voltage component 2, the corresponding connection end 8 and the connection end 7) of the high-voltage wiring harness is in an off state, if the high-voltage component is in a short-circuit state, one of two groups of (R2_1, R2_3, R2_5, R2_7) and (R2_2, R2_4, R2_6, R2_8) can be selected, namely, a common circuit can be omitted, here, I/O _2_1 can also control a high-level control circuit, which is not necessarily the pulling-up circuit using a resistor shown in FIG. 6, and aims to generate an excitation source, the resistance value of the pull-up resistor is generally selected to be K level so as to detect whether the detection line of the high-voltage wire harness is grounded or not, and the purpose is that when an external pin is connected to a BAT (battery), the pin of the MCU2 can be smaller than an injection current, and other high-voltage components are similar.
TABLE 1
Formula (1):
formula (2):
formula (3):
it can be seen that, in the embodiment of the present application, the above formula relationship can be obtained through a circuit relationship, and a corresponding reference value of the first connection terminal (connection terminal 8) can be obtained, where the corresponding reference value includes a normal connection state reference value of the first connection terminal, a dead-leg state reference value, a short-to-ground state reference value, and a short-to-power battery state reference value (4.5V), and what is obtained by the above formula is a corresponding reference value, where the short-to-power battery state reference value is an empirical value. After the reference values are obtained, the first feedback signal actually detected by the actual MUC2 is used for comparing the first feedback signal with one or more reference values in the corresponding reference values, and when one item corresponds to the reference value conforming to the first feedback signal, the first connection terminal is determined to be in the state of the target corresponding reference value, so that the processor unit MCU1 of the vehicle controller can know the wiring harness state of the connection terminal 8, including whether the connection terminal 8 is in a normal state or a dead state, whether the connection terminal is shorted to the ground or shorted to the BAT. For the second connection end, that is, the connection end 7, the detection can be performed by referring to the detection mode of the connection end 8 correspondingly, and for other high-voltage components, the detection can be performed by referring to the detection mode correspondingly, and the description is not repeated here.
In some embodiments of the present application, there is provided a high voltage wiring harness detection method, based on the high voltage interlock circuit of the foregoing embodiments, the method comprising the steps of:
s10: sending a starting detection signal to a processor unit of the high-voltage component so as to enable the processor unit to send out a first excitation signal;
s20: receiving a first feedback signal sent by a processor unit, wherein the first feedback signal is a signal detected by the processor unit through a first detection end;
s30: and determining the wiring harness state of the high-voltage connector according to the first feedback signal.
In one embodiment, step S30 includes the following steps:
s31: acquiring corresponding reference values of the first connecting end, wherein the corresponding reference values comprise a normal connection state reference value, a pin state reference value, a short-circuit-to-ground state reference value and a short-circuit-to-power battery state reference value of the first connecting end;
s32: comparing the first feedback signal with one or more of the corresponding reference values;
s33: when one item mark corresponds to the reference value and accords with the first feedback signal, the first connection end is confirmed to be in the state of the target corresponding reference value.
Specifically, the corresponding reference values of the first connection terminal are obtained, where the corresponding reference values include a normal connection state reference value, a dead-leg state reference value, a short-to-ground state reference value, and a short-to-power battery state reference value of the first connection terminal, and reference may be made to the foregoing description, and a description thereof is not repeated here.
In some embodiments of the present application, when the first connection end and the second connection end of the high-voltage component are in a disconnected state, a method for detecting a high-voltage wiring harness is further provided, comprising the following steps:
s101: sending a start detection signal to a processor unit of the high-voltage component to enable the processor unit to send out the first excitation signal and the second excitation signal;
s102: receiving a first feedback signal and a second feedback signal sent by the processor unit, wherein the first feedback signal is a signal detected by the processor unit through a first detection end, and the second feedback signal is a signal detected by the processor unit through a second detection end;
s103: and determining the wiring harness state of the high-voltage connector according to the first feedback signal and the second feedback signal.
And determining the wiring harness state of the high-voltage connecting piece according to the first feedback signal and the second feedback signal, namely determining the wiring harness state of the first connecting end according to the first feedback signal, and determining the wiring harness state of the second connecting end according to the second feedback signal. The process of determining the harness state of the first terminal or the second terminal may correspond to the process of how to obtain the terminal 8 described in the foregoing circuit embodiment, and the description is not repeated here.
With respect to steps S101-S103, it can be understood that the process is different from the process of detecting the harness state of the first connection end of the high-voltage component only in the detected port, and in addition, the specific detection process also refers to the corresponding description in the foregoing circuit embodiment, and is not described here.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
It should be noted that, according to the above-mentioned solutions, two circuit implementation manners and corresponding high-voltage harness detection methods are proposed in an embodiment of the present application, and are respectively applied to a scenario where the first connection end and the first connection end of the high-voltage connector are disconnected, and a situation where the first connection end and the first connection end of the high-voltage connector are connected, so that the method has a strong pertinence. It should be noted that, in the embodiment of the present application, in a scenario where the first terminal and the first terminal are connected, only one half of the circuit structure (see the difference between fig. 1 and fig. 4) is needed, and the cost is relatively lower than that in a scenario where the first terminal and the first terminal are disconnected. However, in any of the above scenarios, compared with the prior art, the detection of the wire harness state can be realized by means of interaction between the processor unit inside the high-voltage component and the vehicle control unit, the detection comprehensiveness of the high-voltage component of the vehicle body can be effectively improved, the wire harness state of the high-voltage connecting piece of a certain high-voltage component can be more accurately positioned, the detection is more comprehensive and accurate, moreover, the high-voltage connecting pieces among the high-voltage components are not required to be connected in series by additional wire harnesses, the arrangement complexity of the wire harnesses is reduced, the wire harness cost is also reduced, the high-voltage components can be detected at the same time point or in parallel, and the detection efficiency is higher.
It should be noted that, in some embodiments of the present application, another method for detecting a wire harness state of a high-voltage connector by using an internal processor unit of a high-voltage component is further provided, which is described in the following second and third schemes.
Scheme two
Referring to fig. 8, a second embodiment of the present application provides a high-voltage interlock circuit, and fig. 8 illustrates four high-voltage components, which is not limited specifically. Here, it is assumed that the high-voltage component 2, the high-voltage component 3, the high-voltage component 4, and the high-voltage component 5 are provided, respectively, wherein: the connection end 8 of the high-voltage connection piece of the high-voltage component 2 is connected to one end of the detection loop, the other end of the detection loop is connected to a detection port I/O1_2 of an MCU1 in the vehicle controller, the connection end 8 is further connected to one end of a resistor R2_1, the other end of the resistor R2_1 is connected to a port I/O2_1 of an MUC2 in the high-voltage component, the connection end 7 and the connection end 8 are connected in series, the connection end 7 is connected to the 6 end of the high-voltage connection piece corresponding to the next high-voltage component 3, the connection ends of the high-voltage connection pieces of the high-voltage components in the middle are sequentially connected, the connection end 7 is further connected to one end of a resistor R2_2, the other end of the resistor R2_2 is connected to a port I/O2_2 of the MUC2 in the high-voltage component, and the MCU1 is connected to a bus transceiver 1 corresponding to the vehicle controller through the bus transceiver 2. The connection terminal 1 of the high-voltage connector corresponding to the high-voltage component 5 is connected to one end of the excitation source circuit, the other end of the excitation source circuit is connected to the detection port I/O1_1 of the MCU1, the connection terminal 1 of the high-voltage connector corresponding to the high-voltage component 5 is further connected to one end of the resistor R5_1, the other end of the resistor R5_1 is connected to the port I/O5_1 of the MCU5 corresponding to the high-voltage component 5, the MCU5 is connected to the bus transceiver 1 corresponding to the vehicle controller through the bus transceiver 5, the high-voltage component 3 is connected to the bus transceiver 1 corresponding to the vehicle controller through the bus transceiver 3, the voltage consumer 4 is connected to the bus transceiver 1 corresponding to the vehicle controller through the bus transceiver 4, fig. 8 further includes resistors R3_1, R3_2, R4_1, R4_2, R5_2, and the connection terminals of the high-voltage connectors corresponding to other high-voltage components, including the connection terminal 5, the connection terminal 1, the connection terminal connection is further connection terminal connection is connected to the high-connection terminal connection of the high-connection of the MCU3, the high-connection of, 4. 3 and 2, and also includes ports of MCUs corresponding to other high-voltage components, including I/O3_1, I/O3_2, I/O4_1, I/O4_2, and I/O5_1, and the connection relationship thereof can refer to fig. 8, which is not described one by one here. It should be noted that, for convenience of illustration, the embodiment of the present application is described by taking only 4 high-voltage components as an example, and if there are more high-voltage components, the analogy can be made, and specific examples are not given here.
It should be noted that, in some embodiments of the present application, the resistors R2_1 and R2_2 may be selected alternatively, and if two simultaneous selection effects are better, the other resistors R3_1, R3_2, R4_1, R4_2, R5_1, and R5_2 are similar, and if there are more high-voltage components, a general resistor unit may be subtracted, which is not illustrated here.
The operation of this high-voltage interlock circuit is described here in the scheme shown in fig. 8:
step 1: the Vehicle Control Unit (VCU) generates a driving signal through the driving source circuit, where the driving signal may be a high level transmitted by a driving terminal I/O1_1 of the MCU1, may be a PWM signal, and is not limited specifically. The MCU1 detects the excitation signal sent by the whole vehicle controller from the detection loop circuit through the detection end I/O1_2, if the corresponding excitation signal can be detected, the high-voltage loop is normal, the high-voltage connectors of all high-voltage components are in normal contact, the high-voltage can be applied, the detection program exits, and if the detection program does not enter the step 2.
Step 2: the whole vehicle controller continuously generates an excitation signal, informs the MCU5 of the high-voltage component 5 to start detection through the bus, does not start detection of the MCUs of the other high-voltage components, sets the ports I/O _5_1 and I/O _5_2 of the MUC5 to be in an input mode (or an ADC (analog to digital converter) end, which can detect the excitation signal) when the MCU5 starts detection, feeds back the excitation signal to the whole vehicle controller through the bus to prompt that the wiring harness of the high-voltage connecting piece of the high-voltage component 5 is in poor contact (namely the connection end 1 or the connection end 2 is in poor contact) if the excitation signal cannot be detected, exits detection, and otherwise enters the step 3.
And 3, step 3: and the vehicle controller continuously generates an excitation signal, informs the MCU4 of the high-voltage component 4 to start detection through the bus, and the remaining steps are consistent with the step 2 until all the high-voltage components finish polling and find a fault point.
In the second embodiment, the MUC of each high-voltage component may feed back the detection result in a bus manner such as CAN or LIN, and the embodiment of the present application is not limited in particular.
Therefore, in the second embodiment of the scheme provided by the application, the wiring harness state of the high-voltage connector of each high-voltage component is detected in sequence, and the specific high-voltage wiring harness of which high-voltage component is poor in contact can be accurately known.
In both of the first and second embodiments, it is required that all of the high-voltage components include the processor unit, and when there is a part of the high-voltage components without the processor unit, the third embodiment can be obtained in addition to the second embodiment.
Scheme three
Referring to fig. 9, a third embodiment of the present application provides a high-voltage interlock circuit, and fig. 9 illustrates four high-voltage components, which is not limited specifically. It is assumed here that the high voltage components 2, 3, 4 and 5 are high voltage components, wherein the high voltage components 2 and 4 do not include MCU, the high voltage components 3 and 4 include MCU, the connection relationship is similar to that in fig. 8, except that the high voltage components 2 and 4 do not include MCU, so the high voltage components 2 and 4 are not connected to the vehicle start-up device through the bus transceiver, the connection ends of the high voltage connectors of the high voltage components are adjacent in sequence, and one connection end of the first and last high voltage components are respectively connected to one end of the detection circuit and one end of the excitation source circuit, which is specifically shown in fig. 9 and will not be described again. It should also be noted that, for convenience of illustration, the embodiment of the present application only exemplifies 4 high-voltage components, and if there are more high-voltage components, the analogy can be made, and specific examples are not given here.
It should be noted that, in some embodiments of the present application, the resistors R3_1 and R3_2 may be selected alternatively, if two simultaneous selection effects are better, the other resistors R5_1 and R5_2 have similar conditions, and if there are more high-voltage components, a general resistor unit may be subtracted, which is not illustrated here.
Step 1: and consistent with the step 1 of the second scheme, if normal exit detection is detected, and if abnormal exit detection is detected, the step 2 is entered.
Step 2: and if the excitation signal cannot be detected, the MCU5 corresponding to the high-voltage component 5 prompts the whole vehicle controller through the bus, the high-voltage wire harness of the high-voltage component 5 has poor contact, the detection is quitted, and otherwise the step 3 is entered.
And 3, step 3: the vehicle control unit continuously generates an excitation signal, informs the MCU of the high-voltage part 3 to start detection through the bus, the MCUs of the other high-voltage parts do not start detection, the I/O _3_1 and the I/O _3_2 of the high-voltage part 3 are set to be in an input mode (or an ADC (analog to digital converter) end, and can detect the excitation signal), if the excitation signal cannot be detected, prompts that the high-voltage wire harness of the high-voltage part 3 or the high-voltage part 4 is in poor contact through the bus, and quits the detection, otherwise, the high-voltage connecting piece wire harness of the high-voltage part 2 is abnormal.
It can be seen that the high-voltage component 4 without the MCU is sandwiched between the high-voltage component 5 with the MCU and the high-voltage component 3 with the MCU, and although it is impossible to locate which high-voltage component is, it is possible to locate one of the two components.
In some embodiments of the present application, there is also provided a vehicle comprising any one of the high voltage interlock circuits mentioned in the above embodiments, for example, the vehicle comprising a high voltage interlock circuit as shown in fig. 7 or fig. 8 or fig. 9.
In one embodiment, one or more computer-readable storage media storing computer-readable instructions are provided, the readable storage media provided by the embodiments including non-volatile readable storage media and volatile readable storage media. The readable storage medium stores computer readable instructions, and the computer readable instructions, when executed by one or more processors, implement the steps or functions of the above-mentioned high-voltage wiring harness detection method, which can be referred to the foregoing embodiments specifically, and will not be described here again.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A high-voltage interlocking loop is characterized by comprising a first excitation source circuit, a first resistance unit and a second resistance unit, one end of the first resistance unit and one end of the second resistance unit are connected in common and the connected end is connected to the first connected end of the high-voltage connecting piece on the high-voltage component, the other end of the first resistance unit is connected to the ground end of the vehicle body, the other end of the second resistance unit is connected with one end of the first excitation source circuit in a common mode, the common connection end is connected to the first detection end of the processor unit of the high-voltage component, the other end of the first excitation source circuit is connected to a first excitation end of the processor unit, the processor unit is used for sending a first excitation signal through the first excitation end, and receiving a first feedback signal detected by the first detection end, and feeding the first feedback signal back to the vehicle control unit through a bus.
2. The high voltage interlock loop of claim 1 wherein said first terminal and said second terminal of said high voltage terminal are in a short circuit condition.
3. The high-voltage interlock circuit according to claim 1 or 2, further comprising a third resistance unit, wherein one end of the third resistance unit is connected to a common end of the second resistance unit and the first excitation source circuit, and the other end of the third resistance unit is connected to the vehicle body ground.
4. The high-voltage interlock loop of claim 3, wherein the first excitation source circuit comprises a fourth resistance unit, one end of the fourth resistance unit is connected to the common end of the second resistance unit and the third resistance unit, and the other end of the fourth resistance unit is connected to the first excitation end.
5. The high-voltage interlocking circuit as claimed in claim 1, wherein the first connection end and the second connection end of the high-voltage connection member are in a disconnected state, the high-voltage interlocking circuit further comprises a second excitation source circuit, a fifth resistance unit and a sixth resistance unit, one end of the fifth resistance unit and one end of the sixth resistance unit are connected in common and the connected end is connected to the second connection end, the other end of the fifth resistance unit is connected to the vehicle body ground end, the other end of the sixth resistance unit and one end of the second excitation source circuit are connected in common and the connected end is connected to the second detection end of the processor unit, the other end of the second excitation source circuit is connected to the second excitation end of the processor unit, the processor unit is configured to receive a second feedback signal detected by the second detection end after the second excitation end sends out a second excitation signal, and feeding back the second feedback signal to the vehicle control unit through the bus.
6. A vehicle comprising a high-pressure interlock circuit according to any one of claims 1 to 5.
7. A high-voltage wiring harness detection method, based on the high-voltage interlock circuit according to any one of claims 1 to 4, comprising:
sending a start detection signal to a processor unit of the high-voltage component to enable the processor unit to send out the first excitation signal;
receiving a first feedback signal sent by the processor unit, wherein the first feedback signal is a signal detected by the processor unit through a first detection end;
and determining the wiring harness state of the high-voltage connector according to the first feedback signal.
8. The method for detecting the high-voltage wire harness according to claim 7, wherein the determining the wire harness state of the high-voltage connector according to the first feedback signal comprises:
acquiring corresponding reference values of the first connecting end, wherein the corresponding reference values comprise a normal connection state reference value, a dead foot state reference value, a short-to-ground state reference value and a short-to-power battery state reference value of the first connecting end;
comparing the first feedback signal with one or more of the corresponding reference values;
and when one item mark corresponds to the reference value and meets the first feedback signal, confirming that the first connection end is in the wiring harness state of the target corresponding reference value.
9. A high-voltage wiring harness detection method, based on the high-voltage interlock circuit of claim 5, characterized by comprising:
sending a start detection signal to a processor unit of the high-voltage component to enable the processor unit to send out the first excitation signal and the second excitation signal;
receiving a first feedback signal and a second feedback signal sent by the processor unit, wherein the first feedback signal is a signal detected by the processor unit through a first detection end, and the second feedback signal is a signal detected by the processor unit through a second detection end;
and determining the wiring harness state of the high-voltage connector according to the first feedback signal and the second feedback signal.
10. One or more readable storage media storing a computer program, wherein the computer program when executed by a processor implements the steps of the high voltage harness detection method according to any one of claims 7 to 9.
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| CN115407236A (en) * | 2022-07-15 | 2022-11-29 | 中国第一汽车股份有限公司 | Method and device for testing high-speed transmission wire harness of vehicle, vehicle and storage medium |
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