CN113544521A - Relay working state detection system, device and method and reverse connection detection method - Google Patents
Relay working state detection system, device and method and reverse connection detection method Download PDFInfo
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- 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
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Abstract
A relay working state detection system, a relay working state detection method and a reverse connection detection method are disclosed, wherein the positive pole of a second DC module (113) is connected with one end of a first sampling circuit module (121), one end of a first resistor (R1) and one end of a main positive relay (112), the other end of a first resistor (R1) is connected with one end of a second resistor (R2), one end of a third resistor (R3), one end of a fourth resistor (R4) and a second measurement processing element (1221), the other end of the second resistor (R2) is connected with the negative pole of the second DC module (113), the other end of the first sampling circuit module (121) and one end of the main negative relay (114), the other end of the third resistor (R3) is connected with the positive pole of the first DC module (111) and the other end of the main positive relay (112), the other end of the fourth resistor (R4) is connected with the negative pole of the first DC module (111) and the other end of the main negative relay (114), the control processing module (130) is connected with the first sampling circuit module (121), the second sampling circuit module (122), the third sampling circuit module (123), the main positive relay (112) and the main negative relay (114). The fault information can be conveniently reported by the detection system in time, and the fault judgment accuracy is improved.
Description
Technical Field
The application relates to the technical field of electric automobiles, in particular to a system, a device and a method for detecting the working state of a relay and a reverse connection detection method.
Background
With the progress of society and the development of science and technology, environmental and energy problems are increasingly prominent, the demand for the development and popularization of electric vehicles is increasing, and the mass production and sale of electric vehicles are started at home and abroad. The vehicle-mounted power battery system is used as a core component of the electric automobile, and the performance of the vehicle-mounted power battery system directly influences the performance and safety of the electric automobile. Because the current passing through the relay is sometimes as high as several hundred amperes, the relay is easy to generate arc discharge and other phenomena under the action of large current and high voltage, if the relay of the automobile breaks down, serious consequences can be caused, for example, the relay is not normally closed during normal running, the dynamic property and the fuel economy of the whole automobile are inevitably influenced, and even the automobile can not run normally; if the relay contact is sintered, the relay contact cannot be normally disconnected, no end power consumption is caused after the vehicle is stopped, electric energy is wasted, and even safety accidents occur during daily maintenance, so that the detection of the state of the relay in the high-voltage loop is very important. At present, no detection device for detecting the state of a relay contact is used for monitoring the closing state information of the relay in real time in order to ensure the safety and the performance of a vehicle-mounted power battery system.
Disclosure of Invention
The embodiment of the application provides a relay working state detection system, a relay working state detection device, a relay working state detection method and a reverse connection detection method.
The first aspect of the embodiment of the application provides a relay working state detection system, which comprises a first loop, a voltage sampling circuit and a control processing module, wherein the first loop comprises a first DC module, a main positive relay, a second DC module and a main negative relay which are sequentially connected in series, the voltage sampling circuit comprises a first sampling circuit module, a second sampling circuit module and a third sampling circuit module, the second sampling circuit module comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a second measurement processing element, wherein,
the positive pole of the second DC module is connected with one end of the first sampling circuit module, one end of the first resistor and one end of the main positive relay, the other end of the first resistor is connected with one end of the second resistor, one end of the third resistor, one end of the fourth resistor and the second measurement processing element, the other end of the second resistor is connected with the negative pole of the second DC module, the other end of the first sampling circuit module and one end of the main negative relay, the other end of the third resistor is connected with the positive pole of the first DC module and the other end of the main positive relay, the other end of the fourth resistor is connected with the negative pole of the first DC module and the other end of the main negative relay, and the control processing module is connected with the first sampling circuit module, the second sampling circuit module, the third sampling circuit module, A main positive relay and a main negative relay;
the first sampling circuit module, the second sampling circuit module and the third sampling circuit module are used for collecting voltage values, the control processing module is used for collecting a first driving signal of the main positive relay and a second driving signal of the main negative relay, comparing the collected voltage values and an expected voltage value obtained according to the first driving signal and the second driving signal, and determining the working states of the main positive relay and the main negative relay, wherein the working states comprise a normal state and an abnormal state.
In one embodiment, the second sampling circuit module further comprises a fifth resistor, a unidirectional conducting element and an external power supply, wherein,
the external power supply, the one-way conduction element and the fifth resistor are sequentially connected in series and then connected with the second measurement processing element, one end of the third resistor and one end of the fourth resistor, wherein the anode of the one-way conduction element is connected with the external power supply;
the external power supply is used for providing electric energy, the one-way conduction element is used for protecting the external power supply, and the fifth resistor is used for protecting the second measurement processing element and providing bias voltage for the second measurement processing element.
In one embodiment, the first sampling circuit block includes a sixth resistor, a seventh resistor, and a first measurement processing element, the third sampling circuit block includes an eighth resistor, a ninth resistor, and a third measurement processing element, wherein,
one end of the sixth resistor is connected with the anode of the second DC module, the other end of the sixth resistor is connected with one end of the seventh resistor and the first measurement processing element, and the other end of the seventh resistor is connected with the cathode of the second DC module;
one end of the eighth resistor is connected with the anode of the first DC module, the other end of the eighth resistor is connected with one end of the ninth resistor and the third measurement processing element, and the other end of the ninth resistor is connected with the cathode of the first DC module;
the sixth resistor and the seventh resistor are used for voltage division and protection of the first measurement processing element, and the eighth resistor and the ninth resistor are used for voltage division and protection of the third measurement processing element.
In one embodiment, the first sampling circuit module further comprises a first protection circuit module, the second sampling circuit module further comprises a second protection circuit module, the third sampling circuit module further comprises a third protection circuit module, wherein,
the other end of sixth resistance is connected the one end of first protection circuit module, the other end of first protection circuit module is connected first measurement processing element, the other end of eighth resistance is connected the one end of third protection circuit module, the other end of third protection circuit module is connected the third measurement processing element, the other end of first resistance the one end of second resistance the other end of third resistance with the one end of fourth resistance is connected the one end of second protection circuit module, the other end of second protection circuit module is connected the second measurement processing element.
In one embodiment, the first protection circuit module includes a first protection device and a first voltage stabilization device, the second protection circuit module includes a second protection device and a second voltage stabilization device, and the third protection circuit module includes a third protection device and a third voltage stabilization device, wherein,
the anode of the second DC module is connected to one end of the first resistor and one end of the sixth resistor, the other end of the first resistor is connected to one end of the second resistor, one end of the third resistor, one end of the fourth resistor and the second protection device, the second protection device is connected to the second measurement processing element and the second voltage stabilization device, the second voltage stabilization device is connected to the cathode of the first DC module, the other end of the sixth resistor is connected to one end of the seventh resistor and the first protection device, the first protection device is connected to the first measurement processing element and the first voltage stabilization device, the first voltage stabilization device is connected to the cathode of the second DC module, the anode of the first DC module is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to one end of the ninth resistor and the third protection device, the third protection device is connected with the third measurement processing element and the third voltage stabilizing device, and the third voltage stabilizing device is connected with the other end of the ninth resistor and the negative electrode of the first DC module.
A second aspect of the embodiments of the present application provides a method for detecting a working state of a relay, which is applied to a system for detecting a working state of a relay in any one of the first aspects, and the method includes:
acquiring a first driving signal of the main positive relay and a second driving signal of the main negative relay through a control processing module;
determining a first set of voltage values from the first and second drive signals, the first set of voltage values being a set of the first, second and third expected voltage values derived from the first and second drive signals;
acquiring a first actual voltage value, a second actual voltage value and a third actual voltage value through the first measurement processing element, the second measurement processing element and the third measurement processing element to obtain a second voltage value set;
and determining the working state of the main positive relay and the main negative relay according to the first voltage value set and the second voltage value set.
In one embodiment, said determining an operational state of said main positive relay and said main negative relay from said first set of voltage values and said second set of voltage values comprises:
when the difference value of the first voltage value set and the second voltage value set is judged to be less than or equal to a preset threshold value, the working state of the main positive relay and/or the main negative relay is determined to be normal;
and when the difference value of the first voltage value set and the second voltage value set is judged to be larger than the preset threshold value, determining that the working state of the main positive relay and/or the main negative relay is abnormal.
In one embodiment, after determining that the working state of the main positive relay and/or the main negative relay is abnormal, the method further includes:
determining the actual opening and closing states of the first relay and the second relay according to the first actual voltage value, the second actual voltage value and the third actual voltage value;
and determining whether the main positive relay and the main negative relay are adhered or cannot be closed according to the first driving signal, the second driving signal and the actual opening and closing state.
In one embodiment, after determining the operating states of the main positive relay and the main negative relay according to the first set of voltage values and the second set of voltage values, the method further comprises:
and if the working state of the main positive relay and/or the main negative relay is determined to be abnormal, outputting a prompt message.
A third aspect of the embodiments of the present application provides a reverse connection detection method, which is applied to the relay operating state detection system according to any one of the first aspect, and the method includes:
detecting a driving signal of the main and negative relays;
when the main relay and the negative relay have no driving signals, the second measurement processing element collects a first voltage value;
when the main relay and the negative relay have driving signals, the second measurement processing element acquires a second voltage value;
and when the second voltage value is smaller than the first voltage value, determining that the positive electrode and the negative electrode of the first DC module are reversely connected.
In the application, the relay working state detection system comprises a first loop, a voltage sampling circuit and a control processing module, wherein the first loop comprises a first DC module, a main positive relay, a second DC module and a main negative relay which are sequentially connected in series, the voltage sampling circuit comprises a first sampling circuit module, a second sampling circuit module and a third sampling circuit module, the second sampling circuit module comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a second measurement processing element, wherein the positive pole of the second DC module is connected with one end of the first sampling circuit module, one end of the first resistor and one end of the main positive relay, the other end of the first resistor is connected with one end of the second resistor, one end of the third resistor, one end of the fourth resistor and the second measurement processing element, the other end of the second resistor is connected with the negative pole of the second DC module, the other end of the first sampling circuit module and one end of the main negative relay, the other end of the third resistor is connected with the positive electrode of the first DC module and the other end of the main positive relay, the other end of the fourth resistor is connected with the negative electrode of the first DC module and the other end of the main negative relay, and the control processing module is connected with the first sampling circuit module, the second sampling circuit module, the third sampling circuit module, the main positive relay and the main negative relay; the first sampling circuit module, the second sampling circuit module and the third sampling circuit module are used for collecting voltage values, the control processing module is used for collecting a first driving signal of the main positive relay and a second driving signal of the main negative relay, comparing the collected voltage values with expected voltage values obtained according to the first driving signal and the second driving signal, and determining working states of the main positive relay and the main negative relay, wherein the working states comprise a normal state and an abnormal state. It can be seen that, the relay working state detection system of the present application collects an actual voltage value through the first sampling circuit module, the second sampling circuit module and the third sampling circuit, obtains an expected voltage value according to a first driving signal of the main positive relay and a second driving signal of the main negative relay, compares the actual voltage value with the expected voltage value, and further determines the working states of the main positive relay and the main negative relay, determines the open-close states of the main positive relay and the main negative relay according to the actual voltage value when the relay is abnormal in work, and further determines fault information according to the first driving signal, the second driving signal and the open-close states, so that the fault determination accuracy is improved, and fault information is reported in time.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings referred to in the embodiments or the background art of the present application will be briefly described below.
Fig. 1 is a schematic diagram of a relay operating state detection system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another relay operating condition detection system provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of another relay operating condition detection system provided by an embodiment of the present application;
FIG. 4 is a schematic diagram of another relay operating condition detection system provided by an embodiment of the present application;
FIG. 5 is a schematic diagram of another relay operating condition detection system provided by an embodiment of the present application;
FIG. 6 is a schematic diagram of another relay operating condition detection system provided by an embodiment of the present application;
FIG. 7 is a schematic diagram of another relay operating condition detection system provided by an embodiment of the present application;
fig. 8 is a schematic flowchart of a method for detecting an operating state of a relay according to an embodiment of the present disclosure;
fig. 9 is a schematic flowchart of a reverse connection detection method according to an embodiment of the present application.
Detailed description of the invention
In order to make the technical solutions better understood by those skilled in the art, 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 only partial embodiments of the present application, but not all embodiments. 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.
The following are detailed below.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
A relay is an electrically controlled device. It has an interactive relationship between a control system (also called an input loop) and a controlled system (also called an output loop). It is commonly used in automated control circuits, which are actually a "recloser" that uses low current to control high current operation. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. The vehicle-mounted power battery system is used as a core component of the electric automobile, and the performance of the vehicle-mounted power battery system directly influences the performance and safety of the electric automobile. In order to ensure the safety and performance of a vehicle-mounted power battery system and reduce the potential safety hazard of an automobile, when an automobile relay breaks down, the state and the position information of the relay need to be judged in time, and the conventional relay detection equipment has low fault positioning efficiency and accuracy and cannot report fault information in time.
To the above problem, an embodiment of the present application provides a relay operating condition detecting system and a detecting method, the relay operating condition detecting system includes a first loop, a voltage sampling circuit and a control processing module, the first loop includes a first DC module, a main positive relay, a second DC module and a main negative relay which are connected in series in sequence, the voltage sampling circuit includes a first sampling circuit module, a second sampling circuit module and a third sampling circuit module, the second sampling circuit module includes a first resistor, a second resistor, a third resistor, a fourth resistor and a second measurement processing element, wherein, the positive pole of the second DC module is connected with one end of the first sampling circuit module, one end of the first resistor and one end of the main positive relay, the other end of the first resistor is connected with one end of the second resistor, One end of the third resistor, one end of the fourth resistor and the second measurement processing element, the other end of the second resistor is connected with the negative electrode of the second DC module, the other end of the first sampling circuit module and one end of the main negative relay, the other end of the third resistor is connected with the positive electrode of the first DC module and the other end of the main positive relay, the other end of the fourth resistor is connected with the negative electrode of the first DC module and the other end of the main negative relay, and the control processing module is connected with the first sampling circuit module, the second sampling circuit module, the third sampling circuit module, the main positive relay and the main negative relay; the first sampling circuit module, the second sampling circuit module and the third sampling circuit module are used for collecting voltage values, the control processing module is used for collecting a first driving signal of the main positive relay and a second driving signal of the main negative relay, comparing the collected voltage values and an expected voltage value obtained according to the first driving signal and the second driving signal, and determining the working states of the main positive relay and the main negative relay, wherein the working states comprise a normal state and an abnormal state.
It can be seen that, the relay working state detection system of the present application collects an actual voltage value through the first sampling circuit module, the second sampling circuit module and the third sampling circuit, obtains an expected voltage value according to the first driving signal of the main positive relay and the second driving signal of the main negative relay, compares the actual voltage value with the expected voltage value, and further determines the open/close state of the main positive relay and the main negative relay according to the actual voltage value when the working state of the main positive relay and the working state of the main negative relay are judged to be abnormal, and further determines fault information according to the first driving signal, the second driving signal and the open/close state, so that the fault determination accuracy is improved, and fault information is reported in time.
Embodiments of the present application will be described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a relay working state detection system provided in an embodiment of the present application, the relay working state detection system 100 includes a first loop, a voltage sampling circuit 120 and a control processing module 130, the first loop includes a first DC module 111, a main positive relay 112, a second DC module 113 and a main negative relay 114 that are sequentially connected in series, the voltage sampling circuit 120 includes a first sampling circuit module 121, a second sampling circuit module 122 and a third sampling circuit module 123, the second sampling circuit module 122 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a second measurement processing element 1221, wherein,
the positive electrode of the second DC module 113 is connected to one end of the first sampling circuit module 121, one end of the first resistor R1 and one end of the main positive relay 112, the other end of the first resistor R1 is connected to one end of the second resistor R2, one end of the third resistor R3, one end of the fourth resistor R4 and the second measurement processing element 1221, the other end of the second resistor R2 is connected to the negative electrode of the second DC module 113, the other end of the first sampling circuit module 121 and one end of the main negative relay 114, the other end of the third resistor R3 is connected to the positive electrode of the first DC module 111 and the other end of the main positive relay 112, the other end of the fourth resistor R4 is connected to the negative electrode of the first DC module 111 and the other end of the main negative relay 114, and the control processing module 130 is connected to the first sampling circuit module 121, the first negative relay 114, A second sampling circuit module 122, a third sampling circuit module 123, a main positive relay 112, and a main negative relay 114;
the first sampling circuit module 121, the second sampling circuit module 122, and the third sampling circuit module 123 are configured to collect voltage values, and the control processing module 130 is configured to collect a first driving signal of the main positive relay 112 and a second driving signal of the main negative relay 114, compare the collected voltage values with expected voltage values obtained according to the first driving signal and the second driving signal, and determine operating states of the main positive relay 112 and the main negative relay 114, where the operating states include a normal state and an abnormal state.
The first DC module 111 may include a power battery, a storage battery, a PDC, an integrated motor control, and the like, and the second DC module 113 may include an automobile OBC, a vehicle controller, a fast charging interface, a heater, a DCDC, and the like; the second measurement processing element 1221 may be an AD _ SMP, where SMP refers to a set of processors integrated on one computer. The collected voltage values include a first actual voltage value, a second actual voltage value and a third actual voltage value collected by the first sampling circuit module 121, the second sampling circuit module 122 and the third sampling circuit module 123, and the expected voltage values include a first expected voltage value, a second expected voltage value and a third expected voltage value obtained according to the first driving signal and the second driving signal.
The positive electrode of the first DC module 111 is sequentially connected to the positive electrodes of the main positive relay 112 and the second DC module 113, and the negative electrode of the first DC module 111 is sequentially connected to the negative electrodes of the main negative relay 114 and the second DC module 113.
In a specific implementation, the control processing module 130 obtains a first actual voltage value, a second actual voltage value, and a third actual voltage value from the first sampling circuit module 121, the second sampling circuit module 122, and the third sampling circuit module 123, obtains a first driving signal of the main positive relay 112 and a second driving signal of the main negative relay 114 at this time, obtains a first expected voltage value, a second expected voltage value, and a third expected voltage value according to the first driving signal and the second driving signal, compares the first actual voltage value, the second actual voltage value, and the third actual voltage value with the first expected voltage value, the second expected voltage value, and the third expected voltage value, respectively, and determines that the main positive relay 112 and the main negative relay 114 operate normally if the obtained difference is less than or equal to a preset threshold; if the obtained difference is greater than the preset threshold, the control processing module 130 determines that the main positive relay 112 and the main negative relay 114 work in an abnormal state, and determines the expected opening and closing states of the main negative relay and the main positive relay according to the first driving signal of the main positive relay 112 and the second driving signal of the main negative relay 114 when detecting that the main positive relay 112 or the main negative relay 114 is in the abnormal state; and then, judging the actual opening and closing state of the relay according to the first actual voltage value, the second actual voltage value and the third actual voltage value, and determining the specific fault information of the main positive relay and the main negative relay according to the expected opening and closing state and the actual opening and closing state.
In specific implementation, when the second DC module provides voltage in the relay working state detection system, the switching states of the main positive relay and the main negative relay can be determined only by processing data collected by the first sampling circuit module and the second sampling circuit module, and then the abnormal states of the main positive relay and the main negative relay can be determined. When the first DC module provides voltage in the relay working state detection system, the switching states of the main positive relay and the main negative relay can be determined only by collecting data and processing the data through the second sampling circuit module and the third sampling circuit module.
As can be seen, in this example, the relay operating state detection system compares the actual voltage value with the expected voltage value according to the collected actual voltage value and the expected voltage value, so as to determine the operating states of the main positive relay 112 and the main negative relay 114, thereby improving the accuracy of fault determination and the timeliness of reporting fault information.
Referring to fig. 2 as a possible implementation manner, fig. 2 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application, the second sampling circuit module 122 further includes a fifth resistor R5, a unidirectional conducting element D1, and an external power source 1222, wherein,
the external power source 1222, the one-way conducting element D1 and the fifth resistor R5 are sequentially connected in series and then connected to the second measurement processing element 1221, one end of the third resistor R3 and one end of the fourth resistor R4, wherein the positive electrode of the one-way conducting element is connected to the external power source;
the external power source 1222 is used for providing power, the one-way conduction element D1 is used for protecting the external power source, and the fifth resistor R5 is used for protecting the second measurement processing element 1221 and providing bias voltage for the second measurement processing element 1221.
Wherein the external power supply 1222 provides a bias voltage for the second measurement processing element through the fifth resistor R5. The unidirectional conducting element D1 can prevent the external power source 1222 from being damaged due to too high circuit voltage and prevent the accuracy of the voltage measurement of the second measurement processing element 1221 from being affected.
In specific implementation, the relay working state detection system can also be used for reverse connection detection. For example, it may be detected whether the first DC module 111 is connected in a negative-positive reverse manner, and the current of the external power source 1222 provides a bias voltage to the second measurement processing element 1221 through a fifth resistor R5, at this time, when the first DC module 111 is connected in a positive manner, the voltage value collected by the second measurement processing element 1221 when the main negative relay 114 is opened is smaller than the voltage value collected when the main negative relay 114 is closed; when the first DC module 111 is reversely connected, the voltage value acquired by the second measuring element 1221 when the main negative relay 114 is closed is smaller than the voltage value acquired by the second measuring element 1221 when the main negative relay 114 is open.
In this example, the relay operating state detection system can determine the operating states of the main positive relay 112 and the main negative relay 114 and whether the first DC module 111 is connected in a negative-positive manner by providing the external power source 1222 to the second sampling circuit module 122, so as to improve the accuracy of fault determination.
Referring to fig. 3 as a possible implementation manner, fig. 3 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application, in which the first sampling circuit module 121 includes a sixth resistor R6, a seventh resistor R7, and a first measurement processing element 1211, the third sampling circuit module 123 includes an eighth resistor R8, a ninth resistor R9, and a third measurement processing element 1231, wherein,
one end of the sixth resistor R6 is connected to the positive electrode of the second DC module 113, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and the first measurement processing element 1211, the other end of the seventh resistor R7 is connected to the negative electrode of the second DC module 113, one end of the eighth resistor R8 is connected to the positive electrode of the first DC module 111, the other end of the eighth resistor R8 is connected to one end of the ninth resistor R9 and the third measurement processing element 1231, and the other end of the ninth resistor R9 is connected to the negative electrode of the first DC module 111;
the sixth resistor R6 and the seventh resistor R7 are used for voltage division and protection of the first measurement processing element 1211, and the eighth resistor R8 and the ninth resistor R9 are used for voltage division and protection of the third measurement processing element 1231.
The sixth resistor R6, the seventh resistor R7, the eighth resistor R8, and the ninth resistor R9 are voltage dividing devices, and are further configured to enable the first measurement processing element 1211 and the third measurement processing element 1231 to measure different actual voltage values, respectively, so as to determine the operating states of the main positive relay 112 and the main negative relay 114.
It can be seen that, in this example, the relay operating state detection system realizes voltage division by setting up a plurality of resistors, and the actual voltage values that can be collected under the different states of main positive relay 112 and main negative relay 114, and then judge the operating state of main positive relay 112 and main negative relay 114 according to the actual voltage values, and the circuit is simple, and is with low costs.
As a possible implementation manner, please refer to fig. 4, fig. 4 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application, in which the first sampling circuit module 121 further includes a first protection circuit module 1212, the second sampling circuit module 122 further includes a second protection circuit module 1223, and the third sampling circuit module 123 further includes a third protection circuit module 1232, wherein,
one end of the sixth resistor R6 is connected to one end of the first protection circuit module 1212, the other end of the first protection circuit module 1212 is connected to the first measurement processing element 1211, one end of the eighth resistor R8 is connected to one end of the third protection circuit module 1232, the other end of the third protection circuit module 1232 is connected to the third measurement processing element 1231, the other end of the first resistor R1, one end of the second resistor R2, one end of the third resistor R3 and one end of the fourth resistor R4 are connected to one end of the second protection circuit module 1223, and the other end of the second protection circuit module 1223 is connected to the second measurement processing element 1221.
Wherein the first protection circuit module 1212, the second protection circuit module 1223, and the third protection circuit module 1232 are configured to protect the first measurement processing element 1211, the second measurement processing element 1221, and the third measurement processing element 1231.
The circuit designs of the first protection circuit module 1212, the second protection circuit module 1223, and the third protection circuit module 1232 may be the same amplitude limiting circuit, or different amplitude limiting circuits.
In this example, the relay operating state detection system can protect the first measurement processing element 1211, the second measurement processing element 1221 and the third measurement processing element 1231 by providing the first protection circuit module 1212, the second protection circuit module 1223 and the third protection circuit module 1232, so as to prevent the first measurement processing element 1211, the second measurement processing element 1221 and the third measurement processing element 1231 from being damaged due to over-high voltage or reverse connection, and improve the accuracy of fault judgment.
Referring to fig. 5 as a possible implementation manner, fig. 5 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application, in which the first protection circuit module 1212 includes a first protection device P1 and a first voltage regulator device Q1, the second protection circuit module 1223 includes a second protection device P2 and a second voltage regulator device Q2, and the third protection circuit module 1232 includes a third protection device P3 and a third voltage regulator device Q3,
a positive electrode of the second DC module 113 is connected to one end of the first resistor R1 and one end of the sixth resistor R6, the other end of the first resistor R1 is connected to one end of the second resistor R2, one end of the third resistor R3, one end of the fourth resistor R4 and the second protection device P2, the second protection device P2 is connected to the second measurement processing element 1221 and the second voltage stabilization device Q2, the second voltage stabilization device Q2 is connected to a negative electrode of the first DC module 111, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and the first protection device P1, the first protection device P1 is connected to the first measurement processing element 1211 and the first voltage stabilization device Q1, the first voltage stabilization device Q1 is connected to a negative electrode of the second DC module 113, a positive electrode of the first DC module 111 is connected to one end of the eighth resistor R636, and the other end of the eighth resistor R8 is connected to the ninth protection device P9 The third protection device P3 is connected to the third measurement processing element 1231 and the third regulator device Q3, and the third regulator device Q3 is connected to the other end of the ninth resistor R9 and the negative terminal of the first DC module 111.
Wherein the first protection circuit module 1212 includes a first protection device P1 and a first voltage regulator device Q1, the second protection circuit module 1212 includes a second protection device P2 and a second voltage regulator device Q2, the third protection circuit module 1212 includes a third protection device P3 and a third voltage regulator device Q3, the first voltage regulator device Q1, the second voltage regulator device Q2 and the third voltage regulator device Q3 may be zener diodes or zener chips, etc., the first protection device P1, the second protection device P2 and the third protection device P3 may include a current limiting resistor, etc., the first voltage regulator device Q1, the second voltage regulator device Q2 and the third voltage regulator device Q3 are reverse-biased in the first protection circuit module 1212, the second protection circuit module 1223 and the third protection circuit module 1232, respectively, the first voltage regulator device Q1 is connected in series with the first protection device P1 and then connected in parallel with the voltage detection device Q35520 when the voltage detection circuit module goes up, the voltages at the measurement points of the first measurement processing element 1211, the second measurement processing element 1221, and the third measurement processing element 1231 are kept substantially constant, thereby protecting the circuit.
In this example, the relay operating state detection system performs circuit protection through the first protection device P1 and the first voltage stabilization device Q1, the second protection device P2 and the second voltage stabilization device Q2, and the third protection device P3 and the third voltage stabilization device Q3, so that the first measurement processing element 1211, the second measurement processing element 1221 and the third measurement processing element 1231 are prevented from being damaged due to overhigh voltage or reverse connection, and the circuit safety and the accuracy of fault judgment are improved.
As a possible implementation, the first protection device, the second protection device and the third protection device are respectively a first protection resistor, a second protection resistor and a third protection resistor; the first voltage stabilizing device, the second voltage stabilizing device and the third voltage stabilizing device are respectively a first voltage stabilizing diode, a second voltage stabilizing diode and a third voltage stabilizing diode.
Therefore, in the example, the relay working state detection system adopts the plurality of resistors and the plurality of voltage stabilizing diodes to protect the circuit of the detection system, so that the system manufacturing cost is reduced, and the circuit safety of the detection system is improved.
Referring to fig. 6 as a possible implementation manner, fig. 6 is a schematic diagram of another relay working state detection system provided in an embodiment of the present application, and the control processing module 130 is electrically connected to the fault processing module 140, the alarm module 150, the fault display module 160, and the transmission module 170 in sequence.
When the control processing module 130 determines that the relay is in an abnormal state in the relay working state detection system, the control processing module 130 transmits the abnormal state to the fault processing module 140, the fault processing module 140 can perform repairing work according to the abnormal state, the alarm module 150 can give an alarm, and the fault display module displays the abnormal state, so that a worker can timely go forward to maintain the relay.
It can be seen that, in this example, the relay working state detection system can perform a repairing work according to the abnormal state, and can repair a small fault in time, thereby avoiding a safety problem and reducing a maintenance cost, and the alarm module 150 and the fault display module 160 can alarm and display the abnormal state that cannot be repaired in time, so that the abnormal state can be repaired in time.
As a possible implementation, the fault handling module is used for analyzing and handling an abnormal state of the relay operation.
The fault handling module 140 may perform simple repair work on the relay according to the abnormal state, and when a repair failure is detected, the abnormal state is fed back, so that a worker and the like can receive information of the abnormal state of the relay in time, for example, the fault handling module 140 transmits fault information to the alarm module 150 and the fault display module 160, so that the worker can repair the relay conveniently.
Therefore, in this example, the fault processing module in the relay working state detection system can perform the repairing work according to the abnormal state, and can feed back the abnormal state which cannot be repaired in time, so that the maintenance cost can be reduced, and the abnormal state can be repaired in time.
Referring to fig. 7 as a possible implementation manner, fig. 7 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application, where the transmission module 170 performs data transmission with a mobile device 180 through wireless transmission.
When the control processing module in the relay working state detection system determines that the relay is in an abnormal state, the fault information is wirelessly transmitted to the mobile device 180 through the transmission module 170, so that a user can conveniently receive the fault information in time, record the fault information and control the processing information.
In this example, the relay operating state detection system transmits the fault information through the transmission module 170, so that the user can process the fault in time and record the fault information and control the processing information.
The embodiment of the application also provides a relay working state detection device, which comprises the relay working state detection system.
Referring to fig. 8, fig. 8 is a schematic flow chart of a method for detecting a working state of a relay according to an embodiment of the present application, which is applied to the system for detecting a working state of a relay, and the method includes:
s801, acquiring a first driving signal of the main positive relay and a second driving signal of the main negative relay through a control processing module;
s802, determining a first set of voltage values according to the first driving signal and the second driving signal, where the first set of voltage values is a set of the first expected voltage value, the second expected voltage value, and the third expected voltage value obtained according to the first driving signal and the second driving signal;
s803, obtaining a first actual voltage value, a second actual voltage value and a third actual voltage value through the first measurement processing element, the second measurement processing element and the third measurement processing element, and obtaining a second voltage value set;
s804, determining the working states of the main positive relay and the main negative relay according to the first voltage value set and the second voltage value set.
It can be seen that, this application relay operating condition detecting system is through obtaining the first drive signal of main positive relay and the second drive signal of main negative relay, and confirm first voltage value set according to first drive signal and second drive signal again to and obtain first actual voltage value, second actual voltage value and third actual voltage value, obtain the second voltage value set, confirm the operating condition of main positive relay and main negative relay according to first voltage value set and second voltage value set, and then relay operating condition detecting system can accurately judge fault information, improved the fault and judged the degree of accuracy and in time reported fault information.
In one possible example, the determining the operating states of the main positive relay and the main negative relay according to the first set of voltage values and the second set of voltage values includes:
when the difference value of the first voltage value set and the second voltage value set is judged to be less than or equal to a preset threshold value, the working state of the main positive relay and/or the main negative relay is determined to be normal;
and when the difference value of the first voltage value set and the second voltage value set is judged to be larger than the preset threshold value, determining that the working state of the main positive relay and/or the main negative relay is abnormal.
In one possible example, after determining that the operating state of the main positive relay and/or the main negative relay is an abnormal first voltage value set and a second voltage value set, the method further includes:
determining the actual opening and closing states of the first relay and the second relay according to the first actual voltage value, the second actual voltage value and the third actual voltage value;
and determining whether the main positive relay and the main negative relay are adhered or cannot be closed according to the first driving signal, the second driving signal and the actual opening and closing state.
In one possible example, after determining the operating states of the main positive relay and the main negative relay according to the first set of voltage values and the second set of voltage values, the method further includes:
and if the working state of the main positive relay and/or the main negative relay is determined to be abnormal, outputting a prompt message.
Referring to fig. 9, fig. 9 is a schematic flow chart of a reverse connection detection method according to an embodiment of the present application, which is applied to the relay working state detection system, and the method includes:
s901, detecting a driving signal of the main and negative relays;
s902, when the main and negative relays have no driving signals, a first voltage value is collected through the second measurement processing element;
s903, when the main relay and the negative relay have driving signals, a second voltage value is collected through the second measurement processing element;
s904, when the second voltage value is smaller than the first voltage value, determining that the first DC module is reversely connected.
It can be seen that, this application relay operating condition detecting system detects the actuating signal of main negative relay, when main negative relay does not have actuating signal, gather first voltage value through second measurement processing element, when main negative relay has actuating signal, gather the second voltage value through second measurement processing element, when the second voltage value is less than first voltage value, confirm first DC module and connect in reverse, realized the accuracy degree of accurate judgement first DC module whether positive negative reverse connects to and in time report reverse information.
It should be noted that, for the sake of simplicity, the embodiments of the present application are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The foregoing has outlined rather broadly the principles and features of the present application and the advantages thereof, and the detailed description of the embodiments that follows may be better understood when read in conjunction with the accompanying drawings, which are included to illustrate and explain the principles and implementations of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific implementation and application scope, and in view of the above, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A relay working state detection system is characterized by comprising a first loop, a voltage sampling circuit and a control processing module, wherein the first loop comprises a first DC module, a main positive relay, a second DC module and a main negative relay which are sequentially connected in series, the voltage sampling circuit comprises a first sampling circuit module, a second sampling circuit module and a third sampling circuit module, the second sampling circuit module comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a second measurement processing element, wherein,
the positive pole of the second DC module is connected with one end of the first sampling circuit module, one end of the first resistor and one end of the main positive relay, the other end of the first resistor is connected with one end of the second resistor, one end of the third resistor, one end of the fourth resistor and the second measurement processing element, the other end of the second resistor is connected with the negative pole of the second DC module, the other end of the first sampling circuit module and one end of the main negative relay, the other end of the third resistor is connected with the positive pole of the first DC module and the other end of the main positive relay, the other end of the fourth resistor is connected with the negative pole of the first DC module and the other end of the main negative relay, and the control processing module is connected with the first sampling circuit module, the second sampling circuit module, the third sampling circuit module, A main positive relay and a main negative relay;
the first sampling circuit module, the second sampling circuit module and the third sampling circuit module are used for collecting voltage values, the control processing module is used for collecting a first driving signal of the main positive relay and a second driving signal of the main negative relay, comparing the collected voltage values and an expected voltage value obtained according to the first driving signal and the second driving signal, and determining the working states of the main positive relay and the main negative relay, wherein the working states comprise a normal state and an abnormal state.
2. The relay operating state detecting system according to claim 1, wherein the second sampling circuit module further comprises a fifth resistor, a unidirectional conductive element, and an external power source, wherein,
the external power supply, the one-way conduction element and the fifth resistor are sequentially connected in series and then connected with the second measurement processing element, one end of the third resistor and one end of the fourth resistor, wherein the anode of the one-way conduction element is connected with the external power supply;
the external power supply is used for providing electric energy, the one-way conduction element is used for protecting the external power supply, and the fifth resistor is used for protecting the second measurement processing element and providing bias voltage for the second measurement processing element.
3. The relay operating state detecting system according to claim 1 or 2, wherein the first sampling circuit block includes a sixth resistance, a seventh resistance, and a first measurement processing element, and the third sampling circuit block includes an eighth resistance, a ninth resistance, and a third measurement processing element, wherein,
one end of the sixth resistor is connected with the anode of the second DC module, the other end of the sixth resistor is connected with one end of the seventh resistor and the first measurement processing element, and the other end of the seventh resistor is connected with the cathode of the second DC module;
one end of the eighth resistor is connected with the anode of the first DC module, the other end of the eighth resistor is connected with one end of the ninth resistor and the third measurement processing element, and the other end of the ninth resistor is connected with the cathode of the first DC module;
the sixth resistor and the seventh resistor are used for voltage division and protection of the first measurement processing element, and the eighth resistor and the ninth resistor are used for voltage division and protection of the third measurement processing element.
4. The relay operational status detection system of claim 3, wherein the first sampling circuit module further comprises a first protection circuit module, the second sampling circuit module further comprises a second protection circuit module, the third sampling circuit module further comprises a third protection circuit module, wherein,
the other end of sixth resistance is connected the one end of first protection circuit module, the other end of first protection circuit module is connected first measurement processing element, the other end of eighth resistance is connected the one end of third protection circuit module, the other end of third protection circuit module is connected the third measurement processing element, the other end of first resistance the one end of second resistance the other end of third resistance with the one end of fourth resistance is connected the one end of second protection circuit module, the other end of second protection circuit module is connected the second measurement processing element.
5. The relay operational status detection system according to claim 4, wherein the first protection circuit module includes a first protection device and a first voltage stabilization device, the second protection circuit module includes a second protection device and a second voltage stabilization device, and the third protection circuit module includes a third protection device and a third voltage stabilization device, wherein,
the anode of the second DC module is connected to one end of the first resistor and one end of the sixth resistor, the other end of the first resistor is connected to one end of the second resistor, one end of the third resistor, one end of the fourth resistor and the second protection device, the second protection device is connected to the second measurement processing element and the second voltage stabilization device, the second voltage stabilization device is connected to the cathode of the first DC module, the other end of the sixth resistor is connected to one end of the seventh resistor and the first protection device, the first protection device is connected to the first measurement processing element and the first voltage stabilization device, the first voltage stabilization device is connected to the cathode of the second DC module, the anode of the first DC module is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to one end of the ninth resistor and the third protection device, the third protection device is connected with the third measurement processing element and the third voltage stabilizing device, and the third voltage stabilizing device is connected with the other end of the ninth resistor and the negative electrode of the first DC module.
6. A relay operating state detecting method applied to the relay operating state detecting system according to any one of claims 1 to 5, the method comprising:
acquiring a first driving signal of the main positive relay and a second driving signal of the main negative relay through a control processing module;
determining a first set of voltage values from the first and second drive signals, the first set of voltage values being a set of the first, second and third expected voltage values derived from the first and second drive signals;
acquiring a first actual voltage value, a second actual voltage value and a third actual voltage value through the first measurement processing element, the second measurement processing element and the third measurement processing element to obtain a second voltage value set;
and determining the working state of the main positive relay and the main negative relay according to the first voltage value set and the second voltage value set.
7. The relay operating state detecting method according to claim 6, wherein the determining the operating states of the main positive relay and the main negative relay according to the first set of voltage values and the second set of voltage values comprises:
when the difference value of the first voltage value set and the second voltage value set is judged to be less than or equal to a preset threshold value, the working state of the main positive relay and/or the main negative relay is determined to be normal;
and when the difference value of the first voltage value set and the second voltage value set is judged to be larger than the preset threshold value, determining that the working state of the main positive relay and/or the main negative relay is abnormal.
8. The method for detecting the operating state of the relay according to claim 7, wherein after determining that the operating state of the main positive relay and/or the main negative relay is abnormal, the method further comprises:
determining the actual opening and closing states of the first relay and the second relay according to the first actual voltage value, the second actual voltage value and the third actual voltage value;
and determining whether the main positive relay and the main negative relay are adhered or cannot be closed according to the first driving signal, the second driving signal and the actual opening and closing state.
9. The method for detecting the operating state of the relay according to claim 6, wherein after determining the operating states of the main positive relay and the main negative relay according to the first set of voltage values and the second set of voltage values, the method further comprises:
and if the working state of the main positive relay and/or the main negative relay is determined to be abnormal, outputting a prompt message.
10. A reverse connection detection method applied to the relay operation state detection system according to any one of claims 1 to 5, the method comprising:
detecting a driving signal of the main and negative relays;
when the main relay and the negative relay have no driving signals, a first voltage value is collected through the second measurement processing element;
when the main relay and the negative relay have driving signals, a second voltage value is acquired through the second measurement processing element;
and when the second voltage value is smaller than the first voltage value, determining that the positive electrode and the negative electrode of the first DC module are reversely connected.
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| PCT/CN2020/122591 WO2022082531A1 (en) | 2020-10-21 | 2020-10-21 | Relay working state inspection system, apparatus and method, and reverse connection detection method |
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