CN113544521B - 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
- Publication number
- CN113544521B CN113544521B CN202080013185.3A CN202080013185A CN113544521B CN 113544521 B CN113544521 B CN 113544521B CN 202080013185 A CN202080013185 A CN 202080013185A CN 113544521 B CN113544521 B CN 113544521B
- Authority
- CN
- China
- Prior art keywords
- resistor
- relay
- module
- circuit module
- voltage value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims description 25
- 238000012545 processing Methods 0.000 claims abstract description 122
- 238000005070 sampling Methods 0.000 claims abstract description 100
- 238000005259 measurement Methods 0.000 claims abstract description 96
- 230000000087 stabilizing effect Effects 0.000 claims description 41
- 230000002159 abnormal effect Effects 0.000 claims description 33
- 238000010586 diagram Methods 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A relay working state detection system, a relay working state detection method and a reverse connection detection method are provided, wherein the positive electrode 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 the 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 electrode of the second DC module (113), the other end of the first sampling circuit module (121) and one end of a main negative relay (114), the other end of the third resistor (R3) is connected with 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 with 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 with the first sampling circuit module (121), the second sampling circuit module (123), the third sampling circuit module (112) and the main relay (114). The fault information is convenient to report in time by the detection system, and the fault judgment accuracy is improved.
Description
Technical Field
The application relates to the technical field of electric automobiles, in particular to a relay working state detection system, a device and a method and a reverse connection detection method.
Background
With the progress of society and the development of science and technology, the problems of environment and energy are increasingly outstanding, the development and popularization of electric automobiles are increasingly rising, and the mass production and sales of the electric automobiles 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 up to hundreds of amperes, under the action of high current and high voltage, the relay is easy to generate phenomena such as arc discharge and the like, 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 can be influenced, and even the automobile cannot normally run; if the relay contact is sintered and cannot be normally opened, the relay contact can cause endless power consumption after stopping, waste electric energy and even safety accidents occur during daily maintenance, so that the detection of the state of the relay in a high-voltage loop is very important. At present, a detection device for detecting the state of a relay contact is not available, and in order to ensure the safety and the performance of a vehicle-mounted power battery system, the information of the closing state of the relay needs to be monitored in real time.
Disclosure of Invention
The embodiment of the application provides a relay working state detection system, a device, a method and a reverse connection detection method, wherein the relay working state detection system adopts a plurality of sampling circuit modules, voltage values actually collected by the sampling circuit modules are compared with expected voltage values, and then working states of a main positive relay and a main negative relay are judged, so that fault judgment accuracy is improved, and fault information timeliness is reported.
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,
the positive electrode 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 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.
In one embodiment, the second sampling circuit module further comprises a fifth resistor, a unidirectional conducting element and an external power source, wherein,
the external power supply, the unidirectional 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 positive electrode of the unidirectional conduction element is connected with the external power supply;
the external power supply is used for providing electric energy, the unidirectional 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 module comprises a sixth resistor, a seventh resistor, and a first measurement processing element, the third sampling circuit module comprises 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 positive electrode 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 negative electrode of the first DC module;
the sixth resistor and the seventh resistor are used for dividing and protecting the first measurement processing element, and the eighth resistor and the ninth resistor are used for dividing and protecting 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 the sixth resistor is connected with one end of the first protection circuit module, the other end of the first protection circuit module is connected with the first measurement processing element, the other end of the eighth resistor is connected with one end of the third protection circuit module, the other end of the third protection circuit module is connected with the third measurement processing element, the other end of the first resistor, one end of the second resistor, the other end of the third resistor and one end of the fourth resistor are connected with one end of the second protection circuit module, and the other end of the second protection circuit module is connected with the second measurement processing element.
In one embodiment, the first protection circuit module includes a first protection device and a first voltage regulator device, the second protection circuit module includes a second protection device and a second voltage regulator device, and the third protection circuit module includes a third protection device and a third voltage regulator device, wherein,
the positive pole of second DC module is connected the one end of first resistance with the one end of sixth resistance, the other end of first resistance is connected the one end of second resistance, the one end of third resistance, the one end of fourth resistance and the second protection device, the second protection device is connected the second measurement processing element with the second voltage stabilizing device, the second voltage stabilizing device is connected the negative pole of first DC module, the other end of sixth resistance is connected the one end of seventh resistance with first protection device, first protection device is connected the first measurement processing element with first voltage stabilizing device, first voltage stabilizing device is connected the negative pole of second DC module, the positive pole of first DC module is connected the one end of eighth resistance, the other end of eighth resistance is connected the one end of ninth resistance with third protection device, the third protection device is connected the third measurement processing element with the third voltage stabilizing device, the third other end is connected the negative pole of first DC module with the first voltage stabilizing device.
A second aspect of an embodiment of the present application provides a method for detecting a working state of a relay, which is applied to any one of the relay working state detection systems of the first aspect, and the method includes:
the control processing module is used for acquiring a first driving signal of the main positive relay and a second driving signal of the main negative relay;
determining a first voltage value set according to the first driving signal and the second driving signal, wherein the first voltage value set is a set of the first expected voltage value, a second expected voltage value and the third expected voltage value obtained according to the first driving signal and the second driving signal;
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 states 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, the 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 includes:
When the difference value between the first voltage value set and the second voltage value set is less than or equal to a preset threshold value, determining that the working state of the main positive relay and/or the main negative relay is normal;
and when judging that the difference value between the first voltage value set and the second voltage value set is 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 the 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 can not 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 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, the method further comprises:
and outputting a prompt message if the working state of the main positive relay and/or the working state of the main negative relay are abnormal.
A third aspect of embodiments of the present application provides a reverse connection detection method, which is applied to the relay working state detection system described in any one of the first aspect, and the method includes:
detecting a driving signal of the main negative relay;
when the main negative relay has no driving signal, the second measurement processing element acquires a first voltage value;
when the main negative relay has a driving signal, 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, a 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, the positive electrode 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 fourth resistor and one end of 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 main positive relay, and the main relay is connected with the first sampling circuit module and the 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 first driving signals of the main positive relay and second driving signals of the main negative relay, comparing the collected voltage values with expected voltage values obtained according to the first driving signals and the second driving signals, 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. Therefore, the relay working state detection system acquires actual voltage values through the first sampling circuit module, the second sampling circuit module and the third sampling circuit, obtains expected voltage values according to the first driving signals of the main positive relay and the second driving signals of the main negative relay, compares the actual voltage values with the expected voltage values, further judges working states of the main positive relay and the main negative relay, and determines opening and closing states of the main positive relay and the main negative relay according to the actual voltage values when working is abnormal, further judges fault information according to the first driving signals, the second driving signals and the opening and closing states, and improves fault judgment accuracy and timely reports the fault information.
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 describe the technical solutions in the embodiments or the background of the present application, the following description will briefly describe the drawings related to the embodiments or the background of the present application.
Fig. 1 is a schematic diagram of a relay working state detection system provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application;
FIG. 4 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application;
FIG. 5 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application;
FIG. 6 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application;
FIG. 7 is a schematic diagram of another relay operating state detection system provided in an embodiment of the present application;
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;
fig. 9 is a flow chart of a reverse connection detection method provided in the embodiment of the present application.
Detailed description of the preferred embodiments
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
The following will describe in detail.
The terms "first," "second," "third," and "fourth" and the like in the description and in the claims of this application and in the drawings, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprising," "including," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may 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 may be included in at least one embodiment of the present application. The appearances of such phrases 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
A relay is an electrical control device. It has an interactive relationship between the control system (also called input loop) and the controlled system (also called output loop). It is commonly used in automated control circuits and is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, the circuit plays roles of automatic regulation, safety protection, circuit switching 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 the vehicle-mounted power battery system and reduce the potential safety hazard of an automobile, when an automobile relay fails, the state and position information of the relay need to be judged in time, and the existing relay detection equipment has low failure positioning efficiency and accuracy and can not report failure information in time.
In view of the above problems, an embodiment of the present application provides a relay operating state detection system and a detection method, where the relay operating state detection system includes a first loop, a voltage sampling circuit and a control processing module, where the first loop includes a first DC module, a main positive relay, a second DC module and a main negative relay that are sequentially connected in series, 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, where an anode of the second DC module is connected to one end of the first sampling circuit module, one end of the first resistor is connected to one end of the main positive relay, another end of the first resistor is connected to one end of the second resistor, one end of the third resistor is connected to one end of the fourth resistor is connected to the second measurement processing element, and another end of the second resistor is connected to a cathode of the second DC module, another end of the second resistor is connected to another end of the first DC module, another end of the first resistor is connected to another end of the main relay, and another end of the first DC module is connected to another end of the main relay; 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.
Therefore, the relay working state detection system acquires actual voltage values through the first sampling circuit module, the second sampling circuit module and the third sampling circuit, obtains expected voltage values according to the first driving signals of the main positive relay and the second driving signals of the main negative relay, compares the actual voltage values with the expected voltage values, determines the opening and closing states of the main positive relay and the main negative relay according to the actual voltage values when judging that the working states of the main positive relay and the main negative relay work abnormally, and judges fault information according to the first driving signals, the second driving signals and the opening and closing states, so that fault judgment accuracy is improved and fault information is reported timely.
Embodiments of the present application are 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, where 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 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 and a fourth resistor R4 and a second measurement processing element 1221, where,
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 second sampling circuit module 122, the third sampling circuit module 123, the main positive relay and the 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, 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 working states of the main positive relay 112 and the main negative relay 114, where the working 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 OBC, a vehicle controller, a quick charge interface, a heater, a DCDC, and the like; the second measurement processing element 1221 may be an ad_smp, where SMP means a group of processors are clustered 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 a first driving signal and a 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, and 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 value; if the obtained difference is greater than the preset threshold, the control processing module 130 determines that the operation of the main positive relay 112 and the main negative relay 114 is 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 the main positive relay 112 or the main negative relay 114 is detected to be in the abnormal state; and then judging the actual opening and closing states of the relay according to the first actual voltage value, the second actual voltage value and the third actual voltage value, and determining specific fault information of the main positive relay and the main negative relay according to the expected opening and closing states and the actual opening and closing states.
In a specific implementation, when the second DC module provides a voltage in the relay working state detection system, the first sampling circuit module and the second sampling circuit module may collect data and process the data, so as to determine the open-close states of the main positive relay and the main negative relay, and further determine the abnormal states of the main positive relay and the main negative relay. When the first DC module provides voltage in the relay working state detection system, the data can be collected and processed only through the second sampling circuit module and the third sampling circuit module, and the opening and closing states of the main positive relay and the main negative relay can be determined.
It can be seen that, in this example, the relay working state detection system compares the actual voltage value with the expected voltage value according to the collected actual voltage value, so as to determine the working states of the main positive relay 112 and the main negative relay 114, and improve the accuracy of fault determination and timeliness of reporting fault information.
As a possible implementation manner, referring to fig. 2, fig. 2 is a schematic diagram of another relay operating state detection system provided in the 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, where,
The external power supply 1222, the unidirectional conduction 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, where an anode of the unidirectional conduction element is connected to the external power supply;
the external power supply 1222 is configured to provide electric power, the unidirectional conducting element D1 is configured to protect the external power supply, and the fifth resistor R5 is configured to protect the second measurement processing element 1221 and provide a bias voltage to 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 current-carrying element D1 can prevent the external power source 1222 from being damaged due to the excessively high circuit voltage, and prevent the accuracy of the voltage measurement by the second measurement processing element 1221 from being affected.
In a 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 reverse, and the current of the external power supply 1222 provides a bias voltage to the second measurement processing element 1221 through the fifth resistor R5, where, when the first DC module 111 is connected in positive, 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 connected in reverse, the voltage value acquired by the second measurement element 1221 when the main negative relay 114 is closed is smaller than the voltage value acquired by the second measurement element 1221 when the main negative relay 114 is open.
It can be seen that, in this example, the relay working state detection system can determine the working states of the main positive relay 112 and the main negative relay 114 and whether the first DC module 111 is in reverse connection with positive and negative by setting the external power supply 1222 in the second sampling circuit module 122, so as to improve the fault determination accuracy.
As a possible implementation manner, referring to fig. 3, fig. 3 is a schematic diagram of another relay operating state detection system provided in the embodiment of the present application, the first sampling circuit module 121 includes a sixth resistor R6, a seventh resistor R7, and a first measurement processing element 1211, and the third sampling circuit module 123 includes an eighth resistor R8, a ninth resistor R9, and a third measurement processing element 1231, where,
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 to divide and protect the first measurement processing element 1211, and the eighth resistor R8 and the ninth resistor R9 are used to divide and protect 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, so as to determine the working states of the main positive relay 112 and the main negative relay 114.
It can be seen that, in this example, the relay working state detection system realizes voltage division by setting a plurality of resistors, and can collect actual voltage values in different states of the main positive relay 112 and the main negative relay 114, so as to determine the working states of the main positive relay 112 and the main negative relay 114 according to the actual voltage values, and the circuit is simple and the cost is low.
As a possible implementation manner, referring to fig. 4, fig. 4 is a schematic diagram of another relay operation state detection system provided in the embodiment of the present application, where 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, the third sampling circuit module 123 further includes a third protection circuit module 1232, where,
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 clipping circuit or different clipping circuits.
It can be seen that, in this example, the relay working 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 setting the first protection circuit module 1212, the second protection circuit module 1223 and the third protection circuit module 1232, so as to avoid damaging the first measurement processing element 1211, the second measurement processing element 1221 and the third measurement processing element 1231 due to over-high voltage or reverse connection, and improve the accuracy of fault determination.
As a possible implementation manner, referring to fig. 5, fig. 5 is a schematic diagram of another relay operation state detection system provided in this embodiment of the present application, where the first protection circuit module 1212 includes a first protection device P1 and a first voltage stabilizing device Q1, the second protection circuit module 1223 includes a second protection device P2 and a second voltage stabilizing device Q2, the third protection circuit module 1232 includes a third protection device P3 and a third voltage stabilizing device Q3, where,
the 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 stabilizing device Q2, the second voltage stabilizing device Q2 is connected to the 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 negative electrode of the second DC module 113, the positive electrode of the first DC module 111 is connected to one end of the eighth resistor R8, the other end of the eighth resistor R8 is connected to the third resistor R9 and the third protection device P3, and the negative electrode of the third protection device Q3 is connected to the third resistor Q3 and the third protection device P3.
The first protection circuit module 1212 includes a first protection device P1 and a first voltage stabilizing device Q1, the second protection circuit module 1212 includes a second protection device P2 and a second voltage stabilizing device Q2, the third protection circuit module 1212 includes a third protection device P3 and a third voltage stabilizing device Q3, the first voltage stabilizing device Q1, the second voltage stabilizing device Q2 and the third voltage stabilizing device Q3 may be voltage stabilizing diodes or voltage stabilizing chips, etc., the first protection device P1, the second protection device P2 and the third protection device P3 may include current limiting resistors, etc., the first voltage stabilizing device Q1, the second voltage stabilizing device Q2 and the third voltage stabilizing device Q3 are respectively reverse biased in the first protection circuit module 1212, the second protection circuit module 1223 and the third protection circuit module 1232, the first voltage stabilizing device Q1 is connected in series with the first protection device P1 and then connected in parallel with the detection device 520, and when the circuit voltage rises, the first measurement processing element 1211, the second measurement processing element and the third measurement processing element 1221 are kept unchanged.
As can be seen, in this example, the relay operating state detection system performs circuit protection through the first protection device P1 and the first voltage stabilizing device Q1, the second protection device P2 and the second voltage stabilizing device Q2, and the third protection device P3 and the third voltage stabilizing device Q3, so as to avoid damage to the first measurement processing element 1211, the second measurement processing element 1221 and the third measurement processing element 1231 caused by excessive voltage or reverse connection, and improve the circuit safety and the accuracy of fault determination.
As a possible implementation manner, the first protection device, the second protection device and the third protection device are a first protection resistor, a second protection resistor and a third protection resistor, respectively; 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.
In this example, the relay working state detection system protects the circuit of the detection system by adopting a plurality of resistors and a plurality of zener diodes, so that the manufacturing cost of the system is reduced and the circuit safety of the detection system is improved.
As a possible implementation manner, referring to fig. 6, fig. 6 is a schematic diagram of another relay working state detection system provided in the 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 in the relay working state detection system determines that the relay is in an abnormal state, the control processing module 130 transmits the abnormal state to the fault processing module 140, the fault processing module 140 can repair according to the abnormal state, the alarm module 150 can send out alarm sound, and the fault display module displays the abnormal state, so that a worker can repair the relay in time.
It can be seen that, in this example, the relay working state detection system can repair the minor faults in time according to the abnormal states, so as to avoid the safety problem and reduce the maintenance cost, and the alarm module 150 and the fault display module 160 can alarm and display the abnormal states which cannot be repaired in time, so as to repair the abnormal states in time.
As a possible implementation manner, the fault handling module is used for analyzing and handling abnormal states of relay operation.
The fault handling module 140 may simply repair the relay according to the abnormal state, and feedback the abnormal state when detecting failure in repair, so that a worker or the like may receive the information of the abnormal state of the relay in time, for example, the fault handling module 140 transmits the fault information to the alarm module 150 and the fault display module 160, so that the worker is convenient to repair the relay.
Therefore, in this example, the fault processing module in the relay working state detection system can repair according to the abnormal state, and can timely feed back the abnormal state which cannot be repaired, so that the maintenance cost can be reduced, and the abnormal state can be repaired timely.
As a possible implementation manner, referring to fig. 7, fig. 7 is a schematic diagram of another relay operation state detection system provided in the embodiment of the present application, where the transmission module 170 performs data transmission with the 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, fault information is wirelessly transmitted to the mobile device 180 through the transmission module 170, so that a user can receive the fault information in time and record the fault information and the control processing information.
It can be seen that, 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 the control 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, which is applied to the above-mentioned system for detecting a working state of a relay, and the method includes:
s801, a first driving signal of the main positive relay and a second driving signal of the main negative relay are obtained through a control processing module;
S802, determining a first voltage value set according to the first driving signal and the second driving signal, wherein the first voltage value set 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, 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;
s804, working states of the main positive relay and the main negative relay are determined according to the first voltage value set and the second voltage value set.
Therefore, the relay working state detection system of the application is capable of accurately judging fault information by acquiring the first driving signal of the main positive relay and the second driving signal of the main negative relay, determining a first voltage value set according to the first driving signal and the second driving signal, acquiring a first actual voltage value, a second actual voltage value and a third actual voltage value, obtaining a second voltage value set, and 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, so that the relay working state detection system can accurately judge the fault information, and improving the fault judgment accuracy and reporting the fault information in time.
In one possible example, the determining the operating states of the main positive relay and the main negative relay according to the first voltage value set and the second voltage value set includes:
when the difference value between the first voltage value set and the second voltage value set is less than or equal to a preset threshold value, determining that the working state of the main positive relay and/or the main negative relay is normal;
and when judging that the difference value between the first voltage value set and the second voltage value set is 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 the determining that the operating state of the main positive relay and/or the main negative relay is the abnormal first voltage value set 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 can not 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 voltage value set and the second voltage value set, the method further includes:
and outputting a prompt message if the working state of the main positive relay and/or the working state of the main negative relay are abnormal.
Referring to fig. 9, fig. 9 is a schematic flow chart of a reverse connection detection method, which is applied to the above-mentioned relay working state detection system, and the method includes:
s901, detecting a driving signal of the main negative relay;
s902, when the main negative relay has no driving signal, acquiring a first voltage value through the second measurement processing element;
s903, when the main negative relay has a driving signal, acquiring a second voltage value through the second measurement processing element;
and S904, determining that the first DC module is reversely connected when the second voltage value is smaller than the first voltage value.
Therefore, the relay working state detection system detects the driving signal of the main negative relay, when the main negative relay has no driving signal, the second measurement processing element is used for collecting the first voltage value, when the main negative relay has the driving signal, the second measurement processing element is used for collecting the second voltage value, when the second voltage value is smaller than the first voltage value, the first DC module is determined to be reversely connected, the accuracy of accurately judging whether the first DC module is reversely connected in positive and negative directions is realized, and the reverse connection information is timely reported.
It should be noted that, for simplicity of description, the foregoing embodiments of the application are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing has outlined rather broadly the basic principles, features and advantages of the present application and the detailed description of the principles and embodiments herein applied to the present application, the above examples being provided solely to assist in the understanding of the present application and its core ideas; meanwhile, as those skilled in the art will have varying points in specific implementation and application scope in light of the ideas of the present application, the above description should not be construed as limiting the present application.
Claims (8)
1. The 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 first sampling circuit module comprises a sixth resistor, a seventh resistor and a first measurement processing element, the second sampling circuit module comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a second measurement processing element, the third sampling circuit module comprises an eighth resistor, a ninth resistor and a third measurement processing element, wherein,
the positive electrode 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;
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 positive electrode 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 negative electrode of the first DC module; the sixth resistor and the seventh resistor are used for dividing and protecting the first measurement processing element, and the eighth resistor and the ninth resistor are used for dividing and protecting the third measurement processing element;
the first sampling circuit module is used for collecting a first actual voltage value, the second sampling circuit module is used for collecting a second actual voltage value, the third sampling circuit module is used for collecting a third actual voltage value, 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 first actual voltage value, the second actual voltage value and the third actual voltage value with a first expected voltage value, a second period of voltage value and a third expected voltage value obtained according to the first driving signal and the second driving signal respectively, and judging that the working states of the main positive relay and the main negative relay are normal states if the obtained difference value is smaller than or equal to a preset threshold value;
And if the obtained difference value is larger than the preset threshold value, determining that the working states of the main positive relay and the main negative relay are abnormal states.
2. The relay operating state detection system of 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 unidirectional 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 positive electrode of the unidirectional conduction element is connected with the external power supply;
the external power supply is used for providing electric energy, the unidirectional 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 condition detection system of claim 1, 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 the sixth resistor is connected with one end of the first protection circuit module, the other end of the first protection circuit module is connected with the first measurement processing element, the other end of the eighth resistor is connected with one end of the third protection circuit module, the other end of the third protection circuit module is connected with the third measurement processing element, the other end of the first resistor, one end of the second resistor, the other end of the third resistor and one end of the fourth resistor are connected with one end of the second protection circuit module, and the other end of the second protection circuit module is connected with the second measurement processing element.
4. The relay operation state detection system according to claim 3, wherein the first protection circuit module includes a first protection device and a first voltage stabilizing device, the second protection circuit module includes a second protection device and a second voltage stabilizing device, the third protection circuit module includes a third protection device and a third voltage stabilizing device, wherein,
the positive pole of second DC module is connected the one end of first resistance with the one end of sixth resistance, the other end of first resistance is connected the one end of second resistance, the one end of third resistance, the one end of fourth resistance and the second protection device, the second protection device is connected the second measurement processing element with the second voltage stabilizing device, the second voltage stabilizing device is connected the negative pole of first DC module, the other end of sixth resistance is connected the one end of seventh resistance with first protection device, first protection device is connected the first measurement processing element with first voltage stabilizing device, first voltage stabilizing device is connected the negative pole of second DC module, the positive pole of first DC module is connected the one end of eighth resistance, the other end of eighth resistance is connected the one end of ninth resistance with third protection device, the third protection device is connected the third measurement processing element with the third voltage stabilizing device, the third other end is connected the negative pole of first DC module with the first voltage stabilizing device.
5. A method for detecting an operating state of a relay, applied to the system for detecting an operating state of a relay according to any one of claims 1 to 4, the method comprising:
the control processing module is used for acquiring a first driving signal of the main positive relay and a second driving signal of the main negative relay;
determining a first voltage value set according to the first driving signal and the second driving signal, wherein the first voltage value set is a set of the first expected voltage value, a second expected voltage value and the third expected voltage value obtained according to the first driving signal and the second driving signal;
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;
when the difference value between the first voltage value set and the second voltage value set is less than or equal to a preset threshold value, determining that the working states of the main positive relay and the main negative relay are normal;
and when judging that the difference value between the first voltage value set and the second voltage value set is larger than the preset threshold value, determining that the working state of the main positive relay and/or the main negative relay is abnormal.
6. The method for detecting an operating state of a relay according to claim 5, further comprising, after the determining that the operating state of the main positive relay and/or the main negative relay is abnormal:
determining the actual opening and closing states of the main positive relay and the main negative 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 can not be closed according to the first driving signal, the second driving signal and the actual opening and closing state.
7. The method for detecting an operating state of a relay according to claim 5, further comprising, after the operating states of the main positive relay and the main negative relay are determined according to the first set of voltage values and the second set of voltage values:
and outputting a prompt message if the working state of the main positive relay and/or the working state of the main negative relay are abnormal.
8. A reverse connection detection method, characterized in that it is applied to the relay operation state detection system according to any one of claims 1 to 4, and comprises:
Detecting a driving signal of the main negative relay;
when the main negative relay has no driving signal, a first voltage value is acquired through the second measurement processing element;
when the main negative relay has a driving signal, 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.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/122591 WO2022082531A1 (en) | 2020-10-21 | 2020-10-21 | Relay working state inspection system, apparatus and method, and reverse connection detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113544521A CN113544521A (en) | 2021-10-22 |
| CN113544521B true CN113544521B (en) | 2024-03-15 |
Family
ID=78094435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080013185.3A Active CN113544521B (en) | 2020-10-21 | 2020-10-21 | Relay working state detection system, device and method and reverse connection detection method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113544521B (en) |
| WO (1) | WO2022082531A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116148755B (en) * | 2023-04-18 | 2023-08-18 | 马剑 | Detection circuit, single-phase intelligent meter and detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676117A (en) * | 2014-11-17 | 2016-06-15 | 上海海拉电子有限公司 | Relay fault detection circuit and detection method thereof |
| CN109444729A (en) * | 2018-10-30 | 2019-03-08 | 上海元城汽车技术有限公司 | A kind of automobile high-voltage relay diagnostic device and method |
| CN209514004U (en) * | 2018-12-28 | 2019-10-18 | 华人运通(江苏)技术有限公司 | A kind of negative relay status detection circuit of power battery master |
| CN111337822A (en) * | 2020-03-20 | 2020-06-26 | 威睿电动汽车技术(宁波)有限公司 | Relay adhesion detection circuit and main and negative relay adhesion detection method |
| CN213934122U (en) * | 2020-10-21 | 2021-08-10 | 深圳欣锐科技股份有限公司 | Relay working state detection system and device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391241B (en) * | 2014-10-13 | 2018-03-06 | 惠州市亿能电子有限公司 | A kind of electrokinetic cell high-voltage relay state detection circuit and its method |
| CN108802605A (en) * | 2017-04-26 | 2018-11-13 | 宁德时代新能源科技股份有限公司 | Relay adhesion detection method and system |
| CN107526041A (en) * | 2017-08-29 | 2017-12-29 | 宁德时代新能源科技股份有限公司 | Battery detection circuit and battery management system |
| KR102516435B1 (en) * | 2017-10-17 | 2023-03-31 | 엘지이노텍 주식회사 | Electric Vehicle Charging Controller |
| CN110888050B (en) * | 2019-11-12 | 2022-04-22 | 东风汽车有限公司 | Relay adhesion detection device and vehicle |
-
2020
- 2020-10-21 WO PCT/CN2020/122591 patent/WO2022082531A1/en active Application Filing
- 2020-10-21 CN CN202080013185.3A patent/CN113544521B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676117A (en) * | 2014-11-17 | 2016-06-15 | 上海海拉电子有限公司 | Relay fault detection circuit and detection method thereof |
| CN109444729A (en) * | 2018-10-30 | 2019-03-08 | 上海元城汽车技术有限公司 | A kind of automobile high-voltage relay diagnostic device and method |
| CN209514004U (en) * | 2018-12-28 | 2019-10-18 | 华人运通(江苏)技术有限公司 | A kind of negative relay status detection circuit of power battery master |
| CN111337822A (en) * | 2020-03-20 | 2020-06-26 | 威睿电动汽车技术(宁波)有限公司 | Relay adhesion detection circuit and main and negative relay adhesion detection method |
| CN213934122U (en) * | 2020-10-21 | 2021-08-10 | 深圳欣锐科技股份有限公司 | Relay working state detection system and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113544521A (en) | 2021-10-22 |
| WO2022082531A1 (en) | 2022-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203198756U (en) | Monitoring and alarm device for electric car high-tension distribution system | |
| CN107031410B (en) | Electric automobile pre-charging circuit and fault diagnosis method thereof | |
| CN103884988A (en) | Battery pack fault detection device and detection method | |
| CN108944459B (en) | High-voltage safety monitoring system and control method | |
| CN213934122U (en) | Relay working state detection system and device | |
| CN103368380B (en) | Monitoring arrangement and vehicle-mounted type electronic-controlled installation | |
| CN113544521B (en) | Relay working state detection system, device and method and reverse connection detection method | |
| CN113167833B (en) | Relay detection circuit and detection device based on differential sampling | |
| CN106299180B (en) | The combination of electric tool and battery pack | |
| CN104655973A (en) | Method and device for detecting battery module short circuit in UPS system | |
| CN104655907A (en) | Assembled-battery voltage detection device | |
| CN206685314U (en) | A kind of relay with load faulty detection function | |
| CN103723045A (en) | Monitoring and alarming device for electric vehicle high-voltage power distribution systems | |
| CN104483588A (en) | Electrical failure diagnosis method and device for relay control terminal | |
| CN104578243A (en) | A method for monitoring the DC voltage charge and a battery management system | |
| CN113366326A (en) | Relay adhesion detection circuit, method and system | |
| CN105093048A (en) | Port detection system and vehicle possessing same | |
| CN204696641U (en) | A kind of equipment for the protection of high-tension battery using electricity system and the vehicle with this equipment | |
| CN213482396U (en) | Relay detection circuit and detection device based on positive and negative poles | |
| CN213934120U (en) | Relay detection circuit and detection device based on differential sampling | |
| CN203616422U (en) | Input signal state detecting device and electric automobile provided with same | |
| CN115616289A (en) | Insulation resistance value detection circuit and method, battery management controller and vehicle | |
| CN110632492A (en) | Portable IGBT tester | |
| CN113454474B (en) | System and method for detecting working state of main and negative relays | |
| CN213934121U (en) | Main and negative relay working state detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |