CN110445102B - Electronic relay device and protection method - Google Patents
Electronic relay device and protection method Download PDFInfo
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- CN110445102B CN110445102B CN201910749181.0A CN201910749181A CN110445102B CN 110445102 B CN110445102 B CN 110445102B CN 201910749181 A CN201910749181 A CN 201910749181A CN 110445102 B CN110445102 B CN 110445102B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
Abstract
The invention discloses an electronic relay device and a protection method, wherein the electronic relay device comprises a microcontroller, a power switch, a signal acquisition module and a hardware protection module; a control signal receiving end of the microcontroller is electrically connected with the control signal wiring terminal, a first driving signal output end of the microcontroller is electrically connected with the power switch, and the microcontroller is used for outputting a first driving signal to the power switch according to the control signal received by the control signal receiving end; the first detection signal input end of the hardware protection module is electrically connected with the detection signal output end, the second driving signal output end of the hardware protection module is electrically connected with the power switch, and the hardware protection module is used for outputting a second driving signal to the power switch according to a signal acquisition value input by the first detection signal input end. The electronic relay device ensures the stable, safe, lasting and intelligent work of the electronic relay.
Description
Technical Field
The embodiment of the invention relates to the technical field of power/electronics, in particular to the field of automotive electronics and industrial automation, and more particularly relates to an electronic relay device and a protection method.
Background
The relay is a device with the functions of isolation, low-voltage control of high voltage, main switch/reverse connection prevention, small current control of large current and the like, plays the roles of automatic adjustment, safety protection and the like in a circuit, and is widely applied to the fields of automobiles, industry and the like.
The electronic relay is provided with: the relay has the characteristics of long service life, low noise in the switching process, low system power loss, good electromagnetic interference resistance, intellectualization and the like, and occupies an important position in the related application of the relay.
However, the electronic relay is a switching function realized by a semiconductor device, and in order to ensure stable, safe and durable operation of the electronic relay, it becomes important to design an electronic relay apparatus, a protection method, and the like.
Disclosure of Invention
The invention provides an electronic relay device and a protection method, which are used for ensuring the stable, safe and lasting work of an electronic relay.
In a first aspect, an embodiment of the present invention provides an electronic relay device, where the electronic relay device includes a microcontroller, a power switch, a signal acquisition module, and a hardware protection module;
the microcontroller comprises a control signal receiving end and a first driving signal output end; the signal acquisition module comprises a detection signal output end; the hardware protection module comprises a first detection signal input end and a second driving signal output end;
the control signal receiving end is electrically connected with a control signal wiring terminal, the first driving signal output end is electrically connected with the power switch, and the microcontroller is used for outputting a first driving signal to the power switch according to a control signal received by the control signal receiving end;
the first detection signal input end is electrically connected with the detection signal output end, the second driving signal output end is electrically connected with the power switch, and the hardware protection module is used for outputting a second driving signal to the power switch according to a signal acquisition value input by the first detection signal input end.
In a second aspect, an embodiment of the present invention further provides a method for protecting an electronic relay device, where the method for protecting an electronic relay device is implemented based on the electronic relay device in the first aspect;
the protection method of the electronic relay device comprises the following steps:
the microcontroller outputs a first driving signal to the power switch according to the control signal received by the control signal receiving end;
and the hardware protection module outputs a second driving signal to the power switch according to the signal acquisition value input by the first detection signal input end.
The electronic relay device provided by the embodiment of the invention comprises: microcontroller, power switch, signal acquisition module and hardware protection module, microcontroller exports first drive signal to power switch according to the control signal that the control signal receiving terminal received, the second drive signal is exported to power switch to the signal acquisition value that the hardware protection module was input according to first detected signal, the second drive signal that the first drive signal that sends through microcontroller and the second drive signal that the hardware protection module sent control power switch's switching on/shutoff together, because the power switch can be quick turn-off to the hardware protection module, electronic relay has been guaranteed to stabilize, safety and lasting work.
Drawings
Fig. 1 is a schematic structural diagram of an electronic relay apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another electronic relay device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another electronic relay device according to an embodiment of the present invention;
fig. 4 is a flowchart of the entire operation process of the electronic relay apparatus provided by the embodiment of the present invention;
fig. 5 is a flowchart of a protection method for an electronic relay device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. In addition, for convenience of description, only a part of structures related to the present invention, not all of the structures, is shown in the drawings.
Fig. 1 is a schematic structural diagram of an electronic relay device according to an embodiment of the present invention, and as shown in fig. 1, the electronic relay device according to the embodiment includes a microcontroller 10, a power switch 40, a signal acquisition module 20, and a hardware protection module 30; the microcontroller 10 comprises a control signal receiving end AA and a first driving signal output end BB; the signal acquisition module 20 comprises a detection signal output end EE; the hardware protection module 30 includes a first detection signal input terminal CC and a second driving signal output terminal DD; the control signal receiving terminal AA is electrically connected to the control signal connection terminal QQ, and the first driving signal output terminal BB is electrically connected to the power switch 40. The microcontroller 10 is configured to output a first driving signal to the power switch 40 according to the control signal received by the control signal receiving terminal AA; the first detection signal input end CC is electrically connected with the detection signal output end EE, and the second driving signal output end DD is electrically connected with the power switch 40; the hardware protection module 30 is configured to output a second driving signal to the power switch 40 according to the signal collection value input by the first detection signal input terminal CC.
The signal acquisition module 20 may acquire, for example, voltage signals, current signals, chip temperature signals, and environmental temperature signals before, during, and after the electronic relay is turned on; the power switch 40 may include, for example, an insulated gate field effect transistor, an insulated gate bipolar transistor, or the like; the hardware protection module 30 may receive, for example, the signal acquisition value of the signal acquisition module 20. In the embodiment of the present invention, the second driving signal output by the hardware protection module 30 and the first driving signal output by the microcontroller 10 are "and" transmitted to the power switch 40, so as to control the power switch 40 to be turned on or off. Specifically, the power switch 40 can be quickly turned off by setting output thresholds of overvoltage, overcurrent and overtemperature, that is, when the acquired signal acquisition value is greater than a preset detection signal, quickly outputting a second driving signal to the power switch 40, wherein the second driving signal is a stop signal; when the acquired detection signal is smaller than the preset detection signal, a second driving signal is rapidly output to the power switch 40, at this time, the second driving signal is a normal signal, and if the first driving signal output by the microcontroller 10 is also a normal signal, the power switch 40 is turned on. For example, when the second driving signal output by the hardware protection module 30 is a normal signal, and is sent to the power switch 40 after the first driving signal and, the power switch is turned on; when the second driving signal output by the hardware protection module 30 is a stop signal, the power switch 40 is turned off quickly regardless of the state of the first driving signal, so that the power switch 40 is protected better.
The electronic relay device provided by the embodiment of the invention comprises: the microcontroller outputs a first driving signal to the power switch according to a control signal received by the control signal receiving end, the hardware protection module outputs a second driving signal to the power switch according to a signal acquisition value input by the first detection signal input end, and the first driving signal sent by the microcontroller and the second driving signal sent by the hardware protection module control the on/off of the power switch together; the hardware protection module can rapidly turn off the power switch, so that the stable, safe and lasting work of the electronic relay device is ensured.
On the basis of the above technical solution, optionally, fig. 2 is a schematic structural diagram of another electronic relay device provided in an embodiment of the present invention, and as shown in fig. 2, the signal acquisition module 20 includes: a voltage acquisition unit 21, a current acquisition unit 22 and a temperature acquisition unit 23; the voltage acquisition unit 21 comprises a voltage signal receiving end E1 and a voltage signal output end E2; the current collecting unit 22 comprises a current signal receiving end E3 and a current signal output end E4; the temperature acquisition unit 23 comprises a temperature signal receiving end E5 and a temperature signal output end E6; the voltage signal receiving end E1 is electrically connected with the power switch 40, and the voltage signal output end E2 is electrically connected with the hardware protection module 30 and the microcontroller 10 respectively; the current signal receiving end E3 is electrically connected with the power switch 40, and the current signal output end E4 is electrically connected with the hardware protection module 30 and the microcontroller 10 respectively; the temperature signal receiving end E5 is electrically connected with the power switch 40, and the temperature signal output end E6 is electrically connected with the hardware protection module 30 and the microcontroller 10 respectively; the voltage acquisition unit 21 is configured to acquire an input voltage signal of the power switch 40 and an output voltage signal of the power switch 40, and send the input voltage signal and the output voltage signal to the microcontroller 10; the current collecting unit 22 is configured to collect a first current signal of the power switch 40 and send the first current signal to the microcontroller 10; the temperature acquisition unit 23 is configured to acquire a first temperature signal and a second temperature signal of the power switch, and send the first temperature signal and the second temperature signal to the microcontroller 10; the microcontroller 10 is configured to not output the first driving signal to the power switch 40 when the input voltage signal is greater than a first preset input voltage value, the output voltage signal is greater than a first preset output voltage value, the first current signal is greater than a first preset first current value, the first temperature signal is greater than a first preset first temperature value, or the second temperature signal is greater than a first preset second temperature value; wherein, the first temperature signal is the temperature of the power switch 40; the second temperature signal is the temperature of the environment in which the power switch 40 is located.
For example, the voltage collecting unit 21 may collect an input voltage signal and an output voltage signal of the power switch 40 during the power-on detection phase, and the temperature collecting unit 23 may collect a first temperature signal and a second temperature signal of the power switch 40 during the power-on detection phase. The microcontroller 10 determines whether to send the first driving signal to the power switch 40 according to the input voltage signal, the output voltage signal, the first temperature signal and the second temperature signal in the power-on detection stage, so as to ensure whether the power switch 40 is safe before being turned on. Specifically, when any one of the input voltage signal, the output voltage signal, the first temperature signal and the second temperature signal is greater than the corresponding preset value, the microcontroller 10 does not output the first driving signal to the power switch 40, so that the power switch is not turned on, and the safety of the power switch 40 is ensured.
For example, the voltage acquisition unit 21 may acquire an input voltage signal and an output voltage signal of the power switch 40 during a soft start phase, the current acquisition unit 22 may acquire a first current signal of the power switch 40 during the soft start phase, and the temperature acquisition unit 23 may acquire a first temperature signal and a second temperature signal of the power switch 40 during the soft start phase. The microcontroller 10 determines whether to send the first driving signal to the power switch 40 according to the input voltage signal, the output voltage signal, the first current signal, the first temperature signal, and the second temperature signal in the soft start stage, so as to ensure whether the power switch 40 is safe in the soft start stage. Specifically, when any one of the detected values of the input voltage signal, the output voltage signal, the first current signal, the first temperature signal and the second temperature signal is greater than the corresponding preset value, the microcontroller 10 does not output the first driving signal to the power switch 40, so that the power switch 40 is turned off, and the safety of the power switch 40 is ensured.
For example, the voltage acquisition unit 21 may acquire an input voltage signal and an output voltage signal of the power switch 40 in the on phase, the current acquisition unit 22 may acquire a first current signal of the power switch 40 in the on phase, and the temperature acquisition unit 23 may acquire a first temperature signal and a second temperature signal of the power switch 40 in the on phase. The microcontroller 10 determines whether to send the first driving signal to the power switch 40 according to the input voltage signal, the output voltage signal, the first current signal, the first temperature signal, and the second temperature signal in the on-phase, so as to ensure whether the power switch 40 is safe in the on-phase. Specifically, when any one of the input voltage signal, the output voltage signal, the first current signal, the first temperature signal and the second temperature signal is greater than the corresponding preset value, the microcontroller 10 does not output the first driving signal to the power switch 40, so that the power switch 40 is turned off, and the safety of the power switch 40 is ensured.
On the basis of the above scheme, optionally, referring to fig. 2 continuously, the microcontroller 10 further includes a protection signal receiving terminal HH, the hardware protection module 30 further includes a protection signal output terminal II, and the protection signal receiving terminal HH is electrically connected to the protection signal output terminal II; the hardware protection module 30 further includes a delay unit 31; the delay unit 31 includes a delay signal output end MM, and the microcontroller 10 further includes a delay signal receiving end NN electrically connected to the delay signal output end MM; the voltage acquisition unit 21 is further configured to send the input voltage signal and the output voltage to the hardware protection module; the current collecting unit 22 is further configured to send the first current signal to the hardware protection module 30; the temperature acquisition unit 23 is further configured to send the first temperature signal and the second temperature signal to the hardware protection module 30; the hardware protection module 30 is configured to determine that when the input voltage signal is greater than a second preset input voltage value, the output voltage signal is greater than a second preset output voltage value, the first current signal is greater than a second preset first current value, the first temperature signal is greater than a second preset first temperature value, or the second temperature signal is greater than a second preset second temperature value, the stop signal is sent to the microcontroller 10 through the protection signal output end MM, and the stop signal is sent to the power switch 40 through the second drive signal output end DD; the hardware protection module 30 is further configured to output a start signal to the microcontroller 10 after the delay unit 31 delays the fourth time, and control the microcontroller 10 to continue to send the first driving signal to the power switch 10. Meanwhile, the hardware protection module 30 also sends a stop signal to the microcontroller 10, so that the microcontroller does not continue to send the first driving signal to the power switch 40, thereby reducing power consumption. When the second voltage signal of the power switch 40 is decreased to the second voltage preset value, the first current signal is decreased to the first current preset value, and the second temperature signal is decreased to the second temperature preset value, the second driving signal is continuously output to the power switch 40, and meanwhile, after the hardware protection module 30 delays for the fourth time through the delay unit 31, the hardware protection module sends a signal to the microcontroller 10 so that the microcontroller 10 continuously sends the first driving signal to the power switch 40, because the power switch 40 is turned on according to the first driving signal and the second driving signal, when the hardware protection module 30 delays for the fourth time through the delay unit 31, the hardware protection module sends a signal to the microcontroller 10 so that the microcontroller 10 continuously sends the first driving signal to the power switch 40, the power switch 40 can be further kept turned off, and the power switch 40 is further protected.
The first preset input voltage value may be equal to the second preset input voltage value, the first preset output voltage value may be equal to the second preset output voltage value, the first preset first current value may be equal to the second preset first current value, the first preset first temperature value may be equal to the second preset first temperature value, and the first preset second temperature value may be equal to the second preset second temperature value.
Specifically, the hardware protection module 30 may, for example, set the output thresholds of the overvoltage, the overcurrent and the overtemperature, that is, the second preset input voltage value, the second preset output voltage value, the second preset first current value, the second preset first temperature value and the second preset second temperature value, when the input voltage signal is greater than the second preset input voltage value, the output voltage signal is greater than the second preset output voltage value, the first current signal is greater than the second preset first current value, the first temperature signal is greater than the second preset first temperature value, or the second temperature signal is greater than the second preset second temperature value, rapidly output the second driving signal to the power switch 40, at this time, the second driving signal is a stop signal, so that the power switch 40 is rapidly turned off by setting the hardware protection module in the embodiment of the present invention, the power switch 40 can be rapidly controlled to turn off, the power switch 40 is prevented from being damaged due to over-temperature, over-voltage or over-current, and the power switch 40 is protected better. When the input voltage signal of the power switch 40 is decreased to the second preset input voltage value, the output voltage signal is decreased to the second preset output voltage value, the first current signal is decreased to the second preset first current value, the first temperature signal is decreased to the second preset first temperature value, and the second temperature signal is decreased to the second preset second temperature value, the second driving signal is continuously output to the power switch 40, and simultaneously, after the hardware protection module 30 is delayed for the fourth time by the delay unit 31, the signal is sent to the microcontroller 10 so that the microcontroller 10 continuously sends the first driving signal to the power switch 40, because the power switch 40 is turned on according to the first driving signal and the second driving signal, when the hardware protection module 30 is delayed for the fourth time by the delay unit 31, the signal is sent to the microcontroller 10 so that the microcontroller 10 continuously sends the first driving signal to the power switch 40, the power switch 40 can be further ensured to be turned off, and the power switch 40 is further protected.
On the basis of the above solution, optionally, with continued reference to fig. 2, the microcontroller 10 comprises: a time acquisition unit 13, a timing unit 11 and a processing unit 12; the timing unit 11 comprises a control signal receiving end AA and a time output end FF; the processing unit 13 comprises a time receiving end GG and a first driving signal output end BB, wherein the time receiving end GG is electrically connected with a time output end FF; the time acquisition unit 13 comprises a time acquisition receiving end Z1 and a time acquisition output end Z2; the time acquisition receiving end Z1 is electrically connected with the power switch 40, and the time acquisition output end Z2 is electrically connected with the processing unit 12; in the on-state of the power switch 40, the time acquisition unit 13 of the microcontroller 10 is configured to acquire the continuous operating time of the power switch 40, and send the continuous operating time to the processing unit 12 of the microcontroller 10; the processing unit 12 of the microcontroller 10 is configured to determine a continuous operating time of the power switch 40, and stop sending the first driving signal to the power switch 40 if the continuous operating time is longer than a preset continuous operating time; the timing unit 11 is used for recording the receiving time of the control signal and sending the receiving time to the processing unit 12 of the microcontroller 10; in the closing stage of the power switch 40, the processing unit 12 is configured to calculate a time difference between the receiving time of the current control signal and the receiving time of the previous control signal, and output a first driving signal to the power switch 40 if the time difference is greater than a preset receiving time value.
Specifically, the timing unit 11 records the receiving time of each control signal, and sends the receiving time of each control signal to the processing unit 12, the processing unit 12 calculates the time difference between the time of receiving the control signal this time and the time of receiving the control signal of the last control signal, and if the time difference is greater than the preset receiving time value set in advance, outputs a first driving signal to the power switch 40; if the time difference is smaller than the preset receiving time value set in advance, which indicates that the time interval between the last start time of the power switch 40 and the current start time is short, the first driving signal is not output to the power switch 40, so that the power switch 40 has sufficient time to dissipate heat, and the power switch 40 is further protected.
Through setting up the time acquisition unit 13 that is used for gathering the duration on-time of power switch 40 stage after switching on to with duration on-time send processing unit 12, processing unit 12 judges when duration on-time is greater than preset duration on-time, stops to export first drive signal to power switch 40, so that power switch 40 stop work, further protected power switch 40, further ensured electronic relay device's safety, increase electronic relay device's life-span.
Optionally, in the start-up phase, the microcontroller 10 is configured to output the driving signal at a third time according to the control signal until the first driving signal is reached; the microcontroller 10 is further configured to determine that when any one of the input voltage signal, the output voltage signal, the first current signal, the first temperature signal, and the second temperature signal is greater than the corresponding preset value, the microcontroller 10 adjusts the value of the output driving signal at a third time until all signal values of the input voltage signal, the output voltage signal, the first current signal, the first temperature signal, and the second temperature signal are less than the corresponding preset values, so as to ensure the safety of the power switch 40.
According to the technical scheme, the output value of the third time is adjusted in the starting stage, so that the interval time is increased in the starting stage of the power switch, the power switch is further protected, the safety of the electronic relay device is further ensured, and the service life of the electronic relay is prolonged.
On the basis of the above solution, optionally, with continued reference to fig. 2, the microcontroller 10 further comprises a counting unit 14; the counting unit 14 comprises a counting acquisition end Z3 and a counting output end Z4; the processing unit 12 further comprises a counting receiver Z5; the counting acquisition end Z3 is electrically connected with the power switch 40, the counting output end Z4 is electrically connected with the counting receiving end Z5, and the counting unit 16 is used for acquiring the opening times of the power switch 40 and sending the opening times to the processing unit 12; the processing unit 12 is configured to stop sending the first driving signal to the power switch 40 when determining that the turn-on number is greater than the preset turn-on number.
This technical scheme is used for gathering the count unit of power switch opening number of times through setting up to open the number of times and send to the processing unit, processing unit judges when opening the number of times and is greater than predetermineeing and open the number of times, stops to power switch output first drive signal, so that power switch stop work, has further protected power switch, has further ensured electronic relay device's safety, increases electronic relay device's life-span. On the basis of the above solution, optionally, with continued reference to fig. 2, the electronic relay device further includes: a storage module 60; the storage module 60 is used for storing the production date and the manufacturer information of the electronic relay device; the storage module 60 is further configured to collect signal collection values at a fifth time interval and store the signal collection values.
The storage module 60 may store parameters of each device of the electronic relay device, production date and manufacturer information of the electronic relay device, and the storage module 60 may further collect a signal collection value received by the microcontroller 10 every fifth time interval, and store the signal collection value so that a subsequent worker or maintainer can refer to the data. In addition, the storage module 60 also stores fault information when the power switch 40 fails, which is beneficial for subsequent staff to obtain failure models of the electronic relays, analyze failure reasons, and the like.
On the basis of the above scheme, optionally, with continued reference to fig. 2, the electronic relay protection device further includes a display module 70; the display module 70 is electrically connected to the microcontroller 10, and is configured to display the input voltage signal, the output voltage signal, the first current signal, the first temperature signal, and the second temperature signal. In addition, the parameters of each component of the running state of the electronic relay, the production date and the manufacturer information of the electronic relay device and the like can be displayed.
The microcontroller 10 may be connected to a bus, for example: the CAN, LIN or UART bus transmits the signal detection value, the working state of the electronic relay device or the fault information of the electronic relay device to the display module 70, and the display module 70 displays the detection signal so that the staff CAN check the detection signal.
According to the technical scheme, the display module is arranged, so that the man-machine interaction is improved, and the working state of the electronic relay is favorably displayed, and the abnormal analysis and fault processing are assisted; by providing the information storage unit, it is advantageous to analyze the cause of failure of the electronic relay device, and the like.
On the basis of the above solution, optionally, fig. 3 is a schematic structural diagram of another electronic relay device provided in an embodiment of the present invention, and referring to fig. 3, the electronic relay protection device further includes: a first protection circuit 110, a second protection circuit 120, and a third protection circuit 130; wherein the first protection circuit 110 is located between the detection power input connection terminal Q1 and the power switch 40; the third protection circuit 130 is located between the detection power output terminal Q2 and the power switch 40; the second protection circuit 120 is electrically connected to the power switch 40. The first protection circuit 110, the second protection circuit 120 and the third protection circuit 130 are used to further protect the power switch 40 from signals such as lightning strikes and surges, which may damage the power switch 40.
Optionally, with continued reference to fig. 2, the electronic relay protection device further comprises a power supply module 140 and a programming and debugging interface 150. The power supply module 140 is electrically connected to the microcontroller 10 and the hardware protection device 30, and is configured to supply power to the microcontroller 10 and the hardware protection device 30. The programming and debugging interface 150 is electrically connected to the microcontroller 10 for programming and debugging the microcontroller 10.
Optionally, the electronic relay protection device further includes a logic conversion module (not shown in the figure), the control signal connection terminal QQ is electrically connected to the microcontroller 10 through the logic conversion module, and the logic conversion module is configured to perform level conversion on the control signal received by the control signal connection terminal QQ for subsequent use.
To sum up, the embodiments of the present invention describe each working stage of the electronic relay device in detail, and fig. 4 is a flowchart of the electronic relay device according to the embodiments of the present invention.
The technical scheme provided by the embodiment of the invention protects the electronic relay device in each working stage, and ensures the stable, safe and lasting work of the electronic relay device.
Based on the same inventive concept, the embodiment of the invention also provides a protection method of the electronic relay device, which is realized based on the electronic relay device. Fig. 5 is a flowchart of a method for protecting an electronic relay device according to an embodiment of the present invention, where the method for protecting an electronic relay device includes:
s1, the microcontroller outputs a first driving signal to the power switch according to the control signal input by the control signal receiving end;
and S2, the hardware protection module outputs a second driving signal to the power switch according to the signal acquisition value input by the first detection signal input end.
According to the protection method of the electronic relay device, the first driving signal sent by the microcontroller and the second driving signal sent by the hardware protection module control the power switch to be switched on or switched off, and the hardware protection module can realize the rapid switching-off of the power switch, so that the stable, safe and lasting work of the electronic relay device is ensured.
On the basis of the above scheme, optionally, the microcontroller outputs the first driving signal to the power switch according to the control signal received by the control signal receiving terminal, including:
the voltage acquisition unit acquires an input voltage signal of the power switch and an output voltage signal of the power switch and sends the input voltage signal and the output voltage signal to the microcontroller;
the current acquisition unit acquires a first current signal of the power switch and sends the first current signal to the microcontroller;
the temperature acquisition unit acquires a first temperature signal and a second temperature signal of the power switch and sends the first temperature signal and the second temperature signal to the microcontroller;
when the input voltage signal is smaller than a first preset input voltage value, the output voltage signal is smaller than a first preset output voltage value, the first current signal is smaller than a first preset first current value, the first temperature signal is smaller than a first preset first temperature value and the second temperature signal is smaller than a first preset second temperature value, outputting a first driving signal to the power switch;
the first temperature signal is the temperature of the power switch; the second temperature signal is the temperature of the environment in which the power switch is located.
In the technical scheme, a voltage acquisition unit acquires an input voltage signal of a power switch and an output voltage signal of the power switch, a current acquisition unit acquires a first current signal of the power switch, a temperature acquisition unit acquires the temperature of the power switch and the temperature of the environment where the power switch is positioned, and the input voltage signal, the output voltage signal, the first current signal, the temperature of the power switch and the temperature of the environment where the power switch is located are sent to the microcontroller, and the microcontroller judges that when the input voltage signal is smaller than a first preset input voltage value, the output voltage signal is smaller than a first preset output voltage value, the first current signal is smaller than a first preset first current value, the first temperature signal is smaller than a first preset first temperature value and the second temperature signal is smaller than a first preset second temperature value, the first driving signal is output to the power switch, so that the safety of the power switch 40 is ensured.
On the basis of the above scheme, optionally, before the hardware protection module outputs the second driving signal to the power switch according to the signal acquisition value input by the first detection signal input end, the method includes:
the voltage acquisition unit sends the input voltage signal and the output voltage signal to the hardware protection module;
the current acquisition unit sends the first current signal to the hardware protection module;
the temperature acquisition unit sends the first temperature signal and the second temperature signal to the hardware protection module;
when the input voltage signal is smaller than a preset input voltage value, the output voltage signal is smaller than a preset output voltage signal, the first current signal is smaller than a preset first current signal, the first temperature signal is smaller than a preset first temperature signal, and the second temperature signal is smaller than a preset second temperature signal, the hardware protection module outputs a second driving signal to the power switch;
when the input voltage signal is greater than a second preset input voltage value, the output voltage signal is greater than a second preset output voltage value, the first current signal is greater than a second preset first current value, the first temperature signal is greater than a second preset first temperature value, or the second temperature signal is greater than a second preset second temperature value, the hardware protection module sends a stop signal to the microcontroller through the protection signal output end and sends the stop signal to the power switch through the second driving signal output end;
and after the hardware protection module delays the fourth time through the delay unit, the hardware protection module outputs a starting signal to the microcontroller, and controls the microcontroller to continuously send the first driving signal to the power switch.
According to the technical scheme, the hardware protection module can rapidly turn off the power switch, so that the stable, safe and lasting work of the electronic relay device is ensured.
On the basis of the above scheme, optionally, the microcontroller outputs the first driving signal to the power switch according to the control signal received by the control signal receiving terminal, including:
the timing unit records the receiving time of the control signal and sends the receiving time to the processing unit of the microcontroller;
the processing unit calculates a time difference value between the receiving time of the current control signal and the receiving time of the previous control signal, and outputs a first driving signal to the power switch when the time difference value is greater than a preset receiving time value;
the hardware protection module outputs a second driving signal to the power switch according to a signal acquisition value input by the first detection signal receiving end, and the hardware protection module comprises:
a time acquisition unit of the microcontroller acquires the continuous working time of the power switch and sends the continuous working time to a processing unit of the microcontroller;
and when the continuous working time of the power switch is longer than the preset continuous working time, the processing unit of the microcontroller stops outputting the first driving signal to the power switch.
The technical scheme further ensures the safety of the electronic relay device and prolongs the service life of the electronic relay device.
On the basis of the above scheme, optionally, the method for protecting an electronic relay device further includes:
the display module displays the input voltage signal, the output voltage signal, the first current signal, the first temperature signal and the second temperature signal.
According to the technical scheme, the display module is arranged, so that the man-machine interaction is improved, and the working state display and the exception handling of the electronic relay are facilitated.
The electronic relay device provided by the embodiment of the invention can be applied to electronic equipment, namely, the electronic equipment comprises the electronic relay device provided by the embodiment. The electronic devices may include, for example, a battery pack main switch, an automobile starter, an automobile distribution box, etc.; the electronic equipment can also be applied to an industrial automation production line.
For example, when the electronic device is a main switch of a battery pack, the electronic relay device provided by the embodiment of the invention is arranged in the battery pack, and power can be supplied to a load through the electronic relay device in the battery pack.
For example, when the electronic device is a battery pack, and the battery pack is connected to the electronic device, the two battery packs may receive and transmit the mutual electrical signal through the electronic relay device.
It is noted that the foregoing is only exemplary of the present invention and the technical principles employed. Those skilled in the art will appreciate that the invention is not limited to the specific embodiments described herein and that various obvious changes, modifications and substitutions are possible, without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An electronic relay device is characterized by comprising a microcontroller, a power switch, a signal acquisition module and a hardware protection module;
the microcontroller comprises a control signal receiving end and a first driving signal output end; the signal acquisition module comprises a detection signal output end; the hardware protection module comprises a first detection signal input end and a second driving signal output end;
the control signal receiving end is electrically connected with a control signal wiring terminal, the first driving signal output end is electrically connected with the power switch, and the microcontroller is used for outputting a first driving signal to the power switch according to a control signal received by the control signal receiving end;
the first detection signal input end is electrically connected with the detection signal output end, the second driving signal output end is electrically connected with the power switch, and the hardware protection module is used for outputting a second driving signal to the power switch according to a signal acquisition value input by the first detection signal input end;
the microcontroller comprises: the device comprises a time acquisition unit, a timing unit and a processing unit;
the timing unit comprises a control signal receiving end and a time output end; the processing unit comprises a time receiving end and the first driving signal output end, and the time receiving end is electrically connected with the time output end;
the time acquisition unit comprises a time acquisition receiving end and a time acquisition output end; the time acquisition receiving end is electrically connected with the power switch, and the time acquisition output end is electrically connected with the processing unit;
in the conducting stage of the power switch, a time acquisition unit of the microcontroller is used for acquiring the continuous working time of the power switch and sending the continuous working time to a processing unit of the microcontroller; the processing unit of the microcontroller is used for judging the continuous working time of the power switch, and if the continuous working time is longer than the preset continuous working time, the processing unit stops sending the first driving signal to the power switch;
the timing unit is used for recording the receiving time of the control signal and sending the receiving time to the processing unit of the microcontroller;
and in the closing stage of the power switch, the processing unit is used for outputting the first driving signal to the power switch when the time difference between the receiving time of the current control signal and the receiving time of the previous control signal is greater than a preset receiving time value.
2. The electronic relay device of claim 1, wherein the signal acquisition module comprises: the device comprises a voltage acquisition unit, a current acquisition unit and a temperature acquisition unit;
the voltage acquisition unit comprises a voltage signal receiving end and a voltage signal output end; the current acquisition unit comprises a current signal receiving end and a current signal output end; the temperature acquisition unit comprises a temperature signal receiving end and a temperature signal output end;
the voltage signal receiving end is electrically connected with the power switch, and the voltage signal output end is respectively electrically connected with the hardware protection module and the microcontroller;
the current signal receiving end is electrically connected with the power switch, and the current signal output end is respectively electrically connected with the hardware protection module and the microcontroller;
the temperature signal receiving end is electrically connected with the power switch, and the temperature signal output end is respectively electrically connected with the hardware protection module and the microcontroller;
the voltage acquisition unit is used for acquiring an input voltage signal of the power switch and an output voltage signal of the power switch and sending the input voltage signal and the output voltage signal to the microcontroller;
the current acquisition unit is used for acquiring a first current signal of the power switch and sending the first current signal to the microcontroller;
the temperature acquisition unit is used for acquiring a first temperature signal and a second temperature signal of the power switch and sending the first temperature signal and the second temperature signal to the microcontroller;
the microcontroller is used for not outputting the first driving signal to the power switch when the input voltage signal is greater than a first preset input voltage value, the output voltage signal is greater than a first preset output voltage value, the first current signal is greater than a first preset first current value, the first temperature signal is greater than a first preset first temperature value, or the second temperature signal is greater than a first preset second temperature value;
wherein the first temperature signal is a temperature of the power switch; the second temperature signal is the temperature of the environment where the power switch is located.
3. The electronic relay device according to claim 2, wherein said microcontroller further comprises a protection signal receiving terminal, said hardware protection module further comprises a protection signal output terminal, said protection signal receiving terminal being electrically connected to said protection signal output terminal; the hardware protection module also comprises a delay unit; the time delay unit comprises a time delay signal output end, the microcontroller also comprises a time delay signal receiving end, and the time delay signal receiving end is electrically connected with the time delay signal output end;
the voltage acquisition unit is also used for sending the input voltage signal and the output voltage signal to the hardware protection module;
the current acquisition unit is also used for sending the first current signal to the hardware protection module;
the temperature acquisition unit is further used for sending the first temperature signal and the second temperature signal to the hardware protection module;
the hardware protection module is used for judging whether the input voltage signal is greater than a second preset input voltage value, the output voltage signal is greater than a second preset output voltage value, the first current signal is greater than a second preset first current value, the first temperature signal is greater than a second preset first temperature value, or the second temperature signal is greater than a second preset second temperature value, and sending a stop signal to the microcontroller through the protection signal output end and sending the stop signal to the power switch through the second driving signal output end; the hardware protection module is further configured to output a start signal to the microcontroller after the delay unit delays for a fourth time, and control the microcontroller to continue sending the first driving signal to the power switch.
4. The electronic relay device according to claim 1, wherein said microcontroller further comprises a counting unit;
the counting unit comprises a counting acquisition end and a counting output end; the processing unit also comprises a counting receiving end; the counting acquisition end is electrically connected with the power switch, and the counting output end is electrically connected with the counting receiving end; the counting unit is used for collecting the opening times of the power switch and sending the opening times to the processing unit; and the processing unit is used for stopping sending the first driving signal to the power switch when judging that the starting times are greater than preset starting times.
5. The electronic relay device according to claim 1, further comprising: a storage module; the storage module is used for storing the production date and the manufacturer information of the electronic relay device;
the storage module is further used for collecting the signal collection value at an interval of fifth time and storing the signal collection value.
6. The electronic relay device according to claim 2, further comprising: a display module;
the display module is electrically connected with the microcontroller and is used for displaying the input voltage signal, the output voltage signal, the first current signal, the first temperature signal and the second temperature signal.
7. A protection method of an electronic relay device, which is realized based on the electronic relay device of any one of claims 1 to 6; it is characterized by comprising:
the microcontroller outputs a first driving signal to the power switch according to the control signal received by the control signal receiving end;
the hardware protection module outputs a second driving signal to the power switch according to a signal acquisition value input by the first detection signal input end;
the microcontroller comprises: the device comprises a time acquisition unit, a timing unit and a processing unit; microcontroller exports first drive signal to power switch according to the control signal that control signal receiving terminal received, includes:
the timing unit records the receiving time of the control signal and sends the receiving time to the processing unit of the microcontroller;
the processing unit calculates a time difference value between the receiving time of the current control signal and the receiving time of the previous control signal, and outputs the first driving signal to the power switch when the time difference value is greater than a preset receiving time value;
the hardware protection module outputs a second driving signal to the power switch according to a signal acquisition value input by the first detection signal receiving end, and the hardware protection module comprises:
a time acquisition unit of the microcontroller acquires the continuous working time of the power switch and sends the continuous working time to a processing unit of the microcontroller;
and when the continuous working time of the power switch is longer than the preset continuous working time, the processing unit of the microcontroller stops outputting the first driving signal to the power switch.
8. The method for protecting an electronic relay device according to claim 7, wherein said signal acquisition module comprises: the device comprises a voltage acquisition unit, a current acquisition unit and a temperature acquisition unit; microcontroller exports first drive signal to power switch according to the control signal that control signal receiving terminal received, includes:
the voltage acquisition unit acquires an input voltage signal of the power switch and an output voltage signal of the power switch, and sends the input voltage signal and the output voltage signal to the microcontroller;
the current acquisition unit acquires a first current signal of the power switch and sends the first current signal to the microcontroller;
the temperature acquisition unit acquires a first temperature signal and a second temperature signal of the power switch and sends the first temperature signal and the second temperature signal to the microcontroller;
when the input voltage signal is smaller than a first preset input voltage value, the output voltage signal is smaller than a first preset output voltage value, the first current signal is smaller than a first preset first current value, the first temperature signal is smaller than a first preset first temperature value, and the second temperature signal is smaller than a first preset second temperature value, outputting the first driving signal to the power switch;
wherein the first temperature signal is a temperature of the power switch; the second temperature signal is the temperature of the environment where the power switch is located.
9. The method of claim 8, wherein the microcontroller further comprises a protection signal receiving terminal, the hardware protection module further comprises a protection signal output terminal, and the protection signal receiving terminal is electrically connected to the protection signal output terminal; the hardware protection module also comprises a delay unit; the hardware protection module outputs a second driving signal to the power switch according to a signal acquisition value input by the first detection signal input end, and the hardware protection module comprises:
the voltage acquisition unit sends the input voltage signal and the output voltage signal to the hardware protection module;
the current acquisition unit sends the first current signal to the hardware protection module;
the temperature acquisition unit sends the first temperature signal and the second temperature signal to the hardware protection module;
when the input voltage signal is smaller than a preset input voltage value, the output voltage signal is smaller than a preset output voltage signal, the first current signal is smaller than a preset first current signal, the first temperature signal is smaller than a preset first temperature signal, and the second temperature signal is smaller than a preset second temperature signal, the hardware protection module outputs a second driving signal to the power switch;
when the input voltage signal is greater than a second preset input voltage value, the output voltage signal is greater than a second preset output voltage value, the first current signal is greater than a second preset first current value, the first temperature signal is greater than a second preset first temperature value, or the second temperature signal is greater than a second preset second temperature value, the hardware protection module sends a stop signal to the microcontroller through the protection signal output end and sends a stop signal to the power switch through the second drive signal output end;
and after the hardware protection module delays for a fourth time through the delay unit, the hardware protection module outputs a starting signal to the microcontroller and controls the microcontroller to continuously send the first driving signal to the power switch.
10. The method for protecting an electronic relay device according to claim 8, further comprising:
the display module displays the input voltage signal, the output voltage signal, the first current signal, the first temperature signal and the second temperature signal.
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| CN110880800B (en) * | 2019-11-27 | 2020-12-11 | 深圳市长江连接器有限公司 | Charging connector for state display |
| CN112108743B (en) * | 2020-08-27 | 2024-01-05 | 上海沪工焊接集团股份有限公司 | Thermal protection control method for controlling internal temperature of arc welding power supply |
| CN113009249B (en) * | 2021-02-22 | 2023-07-28 | 福建星云电子股份有限公司 | Fault diagnosis method for charging pile component |
| CN116382385B (en) * | 2023-04-03 | 2024-03-05 | 无锡市稳先微电子有限公司 | Temperature control method, temperature control circuit, intelligent electronic switch and automobile |
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