CN220399955U - Electronic label - Google Patents
Electronic label Download PDFInfo
- Publication number
- CN220399955U CN220399955U CN202322090085.4U CN202322090085U CN220399955U CN 220399955 U CN220399955 U CN 220399955U CN 202322090085 U CN202322090085 U CN 202322090085U CN 220399955 U CN220399955 U CN 220399955U
- Authority
- CN
- China
- Prior art keywords
- resistor
- power supply
- circuit
- input
- energy storage
- 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
- 238000004146 energy storage Methods 0.000 claims abstract description 68
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 11
- 230000005856 abnormality Effects 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 26
- 230000001012 protector Effects 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000003068 static effect Effects 0.000 abstract description 5
- 239000003990 capacitor Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an electronic tag, which comprises: the electronic tag comprises an energy storage module for storing electric energy, an input protection circuit for avoiding damage to a subsequent circuit caused by abnormality of an input power supply, a charging circuit for charging the energy storage module when the input power supply is connected, a voltage stabilizing circuit for converting an input voltage into a preset voltage when the input power supply is connected, and an output management circuit for switching a power supply of the electronic tag into the energy storage module when the input power supply is not connected and switching the power supply into the input power supply after the input voltage conversion when the input power supply is connected. The utility model has the charging function and the protection function, can prevent the electronic element from being damaged by overcurrent or overvoltage, surge and static electricity of the input power supply, and effectively improves the safety of the circuit.
Description
Technical Field
The utility model relates to the technical field of intelligent transportation, in particular to an electronic tag.
Background
Along with the continuous development of ETC industry, the application scene of electronic tags is increasingly abundant, and along with the increase of use frequency, the endurance time of traditional electronic tags is greatly shortened, and the defects of poor safety and reliability exist, such as neglecting the overcurrent or overvoltage of an input power supply, the possibility of damaging electronic elements due to surges or static electricity in the input power supply, equipment abnormality is caused, and user experience is seriously influenced. The defects of the power supply design scheme adopted by the electronic tag in the current market are increasingly evident, and a design scheme which is rechargeable and has a protection function is lacking.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an electronic tag.
The technical scheme adopted for solving the technical problems is as follows: an electronic tag is constructed, comprising:
an energy storage module for storing electrical energy;
the input protection circuit is connected to the input power supply and is used for avoiding the damage to the subsequent circuit caused by the abnormality of the input power supply;
the charging circuit is connected with the second end of the input protection circuit and the energy storage module and is used for charging the energy storage module when the input power supply is connected;
the voltage stabilizing circuit is connected with the second end of the input protection circuit and used for converting the input voltage of the input protection circuit into a preset voltage when the input power supply is connected; and
and the output management circuit is connected with the energy storage module and is used for switching the power supply of the electronic tag into the energy storage module when the input power supply is not connected and switching the power supply into the input power supply after the input voltage conversion when the input power supply is connected.
Preferably, the input protection circuit comprises an overcurrent protection unit and an overvoltage protection unit; the first end of the overcurrent protection unit is the first end of the input protection circuit, the second end of the overcurrent protection unit is the second end of the input protection circuit, and the second end of the overcurrent protection unit is also connected with the overvoltage protection unit.
Preferably, the output management circuit includes:
the first switch unit is connected with the second end of the input protection circuit and is used for outputting a first control signal when the input power supply is not connected;
the second switch unit is connected with the first switch unit and is used for outputting a second control signal when receiving the first control signal; and
and the third switch unit is connected with the second switch unit and the positive electrode of the energy storage module and is used for being conducted when the second control signal is received, so that the power supply is switched into the energy storage module.
Preferably, the first switching unit includes a first resistor R1, a second resistor R2, a first switching tube Q1, and a third resistor R3; the second switching unit comprises a seventh switching tube Q7, a fourth resistor R4 and a fifteenth resistor R15; the third switching unit comprises an eighth switching tube Q8, a fourteenth resistor R14, a second diode DS2 and a third diode DS3;
the first end of the first resistor R1 is connected with the second end of the input protection circuit, the second end of the first resistor R1 is connected with the control end of the first switching tube Q1 and is also connected to the ground through the second resistor R2, the first end of the first switching tube Q1 is connected with the first end of the fourth resistor R4, the first end of the first switching tube Q1 is also connected to the first direct-current voltage through the third resistor R3, and the second end of the first switching tube Q1 is grounded;
the control end of the seventh switching tube Q7 is connected with the second end of the fourth resistor R4, the second end of the seventh switching tube Q7 is grounded, the first end of the seventh switching tube Q7 is connected to the control end of the eighth switching tube Q8 through the fifteenth resistor R15, and the second end of the seventh switching tube Q7 is grounded;
the control end of the eighth switching tube Q8 is connected to a connection point between the first end of the eighth switching tube Q8 and the positive electrode of the energy storage module through the fourteenth resistor R14, the first end of the eighth switching tube Q8 is further connected to the anode of the second diode DS2, the cathode of the second diode DS2 is connected to the anode of the third diode DS3, the cathode of the third diode DS3 is connected to the second end of the eighth switching tube Q8, and the second end of the eighth switching tube Q8 is used for outputting the positive voltage of the energy storage module when the eighth switching tube Q8 is turned on.
Preferably, the electronic tag further comprises a temperature acquisition circuit for detecting the ambient temperature;
wherein the temperature acquisition circuit comprises a thermistor Rntc; the charging circuit comprises a charging manager U11, a ninth resistor Rt2 and a tenth resistor Rt1;
the power supply end of the charging manager U11 is connected with the second end of the input protection circuit, the battery connection end of the charging manager U11 is connected with the positive electrode of the energy storage module, the temperature detection end of the charging manager U11 is connected with the second end of the thermistor Rntc, the second end of the ninth resistor Rt2 and the second end of the tenth resistor Rt1, the first end of the thermistor Rntc and the first end of the ninth resistor Rt2 are grounded, and the first end of the tenth resistor Rt1 is connected with the second end of the input protection circuit.
Preferably, the voltage stabilizing circuit comprises a linear voltage stabilizer LDO1;
the input end of the linear voltage regulator LDO1 is connected with the second end of the input protection circuit, and when the input power supply is connected, the output end of the linear voltage regulator LDO1 outputs the preset voltage.
Preferably, the electronic tag further comprises a protection circuit connected with the energy storage module and used for preventing the energy storage module from being overcharged and overdischarged.
Preferably, the protection circuit includes a charging protector U12, a fourth resistor R125, a first MOS transistor Q11, a second MOS transistor Q12, and an eighth resistor R124;
the current detection end of the charging protector U12 is connected to the ground through the fourth resistor R125, the charging control end of the charging protector U12 is connected with the grid electrode of the first MOS tube Q11, the discharging control end of the charging protector U12 is connected with the grid electrode of the second MOS tube Q12, the first MOS tube Q11 is connected with the drain electrode of the second MOS tube Q12, the source electrode of the first MOS tube Q11 is grounded, the source electrode of the second MOS tube Q12 is connected with the negative electrode of the energy storage module and the ground end of the charging protector U12, and the power supply end of the charging protector U12 is connected to the positive electrode of the energy storage module through the eighth resistor R124.
Preferably, the electronic tag further comprises an interface circuit connected with the first end of the input protection circuit and used for accessing the input power supply; the interface circuit includes a TypeC interface.
Preferably, the electronic tag further comprises a second end connected with the input protection circuit, and the second end is used for detecting whether the input power supply is connected to the detection signal detection circuit or not and outputting detection signals.
The utility model has the following beneficial effects: when an input power supply is connected, the input protection circuit is utilized to avoid damaging a later-stage circuit due to the abnormality of the input power supply, the energy storage module is charged through the charging circuit, the input voltage of the input power supply is converted into a preset voltage through the voltage stabilizing circuit, and the output management circuit switches the power supply of the electronic tag into the input power supply after the conversion of the input voltage; when the input power supply is not connected, the output management circuit switches the power supply to the energy storage module; the utility model has the charging function and the protection function, can prevent the electronic element from being damaged by overcurrent or overvoltage, surge and static electricity of the input power supply, effectively improves the safety of the circuit, and has the advantages of simple circuit structure and high reliability.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic block diagram of an electronic tag in some embodiments of the utility model;
FIG. 2 is a circuit diagram of an input protection circuit and a detection circuit in some embodiments of the utility model;
FIG. 3 is a circuit diagram of a charging circuit and a temperature acquisition circuit in some embodiments of the utility model;
FIG. 4 is a circuit diagram of a voltage regulator circuit and an output management circuit in some embodiments of the utility model;
fig. 5 is a circuit diagram of a protection circuit in some embodiments of the utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of an electronic tag in some embodiments of the utility model. The electronic tag is suitable for the technical field of intelligent transportation (namely ETC industry), and comprises a communication module, a safety module, a controller (used for controlling the work of each module and circuit in the electronic tag) and the like, and has the advantages of being capable of being charged, good in protection effect, long in endurance time, high in reliability and the like. As shown in fig. 1, the electronic tag includes an energy storage module 1, an input protection circuit 2, a charging circuit 3, a voltage stabilizing circuit 4 and an output management circuit 5.
The energy storage module 1 is used for storing electric energy. In particular, the energy storage module 1 may be composed of at least one battery, and the batteries may be connected in series or in parallel. In order to improve the cruising ability, the battery can adopt a high-capacity lithium iron phosphate battery.
The input protection circuit 2 is connected to an input power supply, and the input protection circuit 2 is used for avoiding damage to a subsequent circuit caused by abnormal input power supply.
In some embodiments, as shown in fig. 2, the input protection circuit 2 includes an overcurrent protection unit 21 and an overvoltage protection unit 22. The first end of the overcurrent protection unit 21 is the first end of the input protection circuit 2, the second end of the overcurrent protection unit 21 is the second end of the input protection circuit 2, and the second end of the overcurrent protection unit 21 is also connected with the overvoltage protection unit 22.
Further, in some embodiments, the over-current protection unit 21 may include a thermistor, a first end of the thermistor is a first end of the over-current protection unit 21, and a second end of the thermistor is a second end of the over-current protection unit 21. In this embodiment, when the current input to the power supply exceeds a set value, the resistance of the thermistor (which may be a PTC thermistor) is rapidly increased to limit the magnitude of the current input to the rear-stage circuit, thereby functioning as an overcurrent protection.
Further, in some embodiments, the overvoltage protection unit 22 may include a TVS diode, a cathode of which is connected to the second terminal of the overcurrent protection unit 21, and an anode of which is grounded.
In this embodiment, when the input power supply is abnormal in voltage such as overvoltage, surge, etc. due to insertion moment, static electricity or voltage fluctuation, the TVS diode clamps the voltage of the input power supply below a protection value, thereby avoiding overvoltage of the subsequent stage circuit. The protection value belongs to the parameter characteristic of the TVS diode, and the protection value can be determined according to the power supply voltage value of the electronic tag.
The charging circuit 3 is connected with the second end of the input protection circuit 2 and the energy storage module 1, and the charging circuit 3 is used for charging the energy storage module 1 when the input power supply is connected.
In some embodiments, as shown in fig. 3, the charging circuit 3 includes a charging manager U11, a ninth resistor Rt2, a tenth resistor Rt1, an eleventh resistor R135, and a twelfth resistor R136. The power supply end VIN of the charging manager U11 is connected with the second end of the input protection circuit 2, the battery connection end BAT of the charging manager U11 is connected with the positive electrode of the energy storage module 1, the temperature detection end NTC of the charging manager U11 is connected with the second end of the ninth resistor Rt2 and the second end of the tenth resistor Rt1, the first end of the ninth resistor Rt2 is grounded, the first end of the tenth resistor Rt1 is connected with the second end of the input protection circuit 2, the charging indication end STAT of the charging manager U11 is connected with the positive electrode of the energy storage module 1 through an eleventh resistor R135, the full-power indication end STBY of the charging manager U11 is connected with the positive electrode of the energy storage module 1 through a twelfth resistor R136, and the charging enabling end EN of the charging manager U11 is connected with the controller.
In this embodiment, the charging manager U11 may be a battery management chip commonly used in the market, the charging indication end of the charging manager U11 may be connected to a controller or an indication circuit, and when the energy storage module 1 is in a charging state, the charging indication end of the charging manager U11 outputs a first set level (such as a high level or a low level), so as to inform the controller that the energy storage module 1 is charging or controls the corresponding indication circuit to work; the full-charge indication end of the charge manager U11 may be connected to a controller or an indication circuit, and after the energy storage module 1 is fully charged, the full-charge indication end of the charge manager U11 outputs a second set level (such as a high level or a low level), so as to inform the controller that the energy storage module 1 is fully charged or control the corresponding indication circuit to work. In addition, the controller may also control whether the charge manager U11 charges the energy storage module 1 by inputting the third setting level to the charge enable terminal EN of the charge manager U11.
The voltage stabilizing circuit 4 is connected to the second end of the input protection circuit 2, and the voltage stabilizing circuit 4 is used for converting an input voltage output by the input power supply into a preset voltage when the input power supply is connected.
In some embodiments, as shown in fig. 4, the voltage stabilizing circuit 4 includes a linear voltage stabilizer LDO1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5. The input end of the linear voltage regulator LDO1 is connected with the second end of the input protection circuit 2, and when the input power supply is connected, the input voltage output by the input power supply is converted into a preset voltage by the linear voltage regulator LDO1, and then the preset voltage is output through the output end of the linear voltage regulator LDO 1. In addition, the third capacitor C3 and the second capacitor C2 are respectively connected in parallel between the input end of the linear regulator LDO1 and ground, and the third capacitor C3 and the second capacitor C2 form an input filtering unit for filtering an input power supply. The fourth capacitor C4 and the fifth capacitor C5 are respectively connected in parallel between the output end of the linear voltage regulator LDO1 and the ground, and the fourth capacitor C4 and the fifth capacitor C5 form an output filtering unit for filtering preset voltage.
The output management circuit 5 is connected with the energy storage module 1, and the output management circuit 5 is used for switching the power supply of the electronic tag into the energy storage module 1 when the input power supply is not connected and switching the power supply into the input power supply after the input voltage conversion when the input power supply is connected.
In some embodiments, as shown in fig. 4, the output management circuit 5 includes a first switching unit 51 for outputting a first control signal when the input power is not connected, a second switching unit 52 for outputting a second control signal when the first control signal is received, and a third switching unit 53 for switching on the power supply source to the energy storage module 1 when the second control signal is received.
The first switch unit 51 is connected to the second end of the input protection circuit 2, the second switch unit 52 is connected to the first switch unit 51, and the third switch unit 53 is connected to the second switch unit 52 and the positive electrode of the energy storage module 1.
In some embodiments, as shown in fig. 4, the first switching unit 51 includes a first resistor R1, a second resistor R2, a first switching tube Q1, a third resistor R3, and a first capacitor C1. Optionally, the first switching transistor Q1 is an NPN triode.
The first end of the first resistor R1 is connected to the second end of the input protection circuit 2, the second end of the first resistor R1 is connected to the control end of the first switching tube Q1 and is also connected to the ground through the second resistor R2, the first end of the first switching tube Q1 is connected to the first end of the fourth resistor R4 in the second switching unit 52, the first end of the first switching tube Q1 is also connected to the first direct current voltage sys_3v3 through the third resistor R3, the second end of the first switching tube Q1 is grounded, and the control end of the first switching tube Q1 is also connected to the ground through the first capacitor C1.
Further, as shown in fig. 4, the second switching unit 52 includes a seventh switching tube Q7, a fourth resistor R4, a fifteenth resistor R15, and an eighth capacitor C8. Optionally, the seventh switching tube Q7 is an NMOS tube.
The control end of the seventh switching tube Q7 is connected to the second end of the fourth resistor R4, the second end of the seventh switching tube Q7 is grounded, the first end of the seventh switching tube Q7 is connected to the control end of the eighth switching tube Q8 in the third switching unit 53 through the fifteenth resistor R15, the second end of the seventh switching tube Q7 is grounded, and the control end of the eighth switching tube Q8 is also connected to the ground through the eighth capacitor C8.
Further, as shown in fig. 4, the third switching unit 53 includes an eighth switching transistor Q8, a fourteenth resistor R14, a second diode DS2, and a third diode DS3. Optionally, the eighth switching tube Q8 is a PMOS tube.
The control end of the eighth switching tube Q8 is connected to the first end of the fifteenth resistor R15 and is connected to a connection point between the first end of the eighth switching tube Q8 and the positive electrode of the energy storage module 1 through the fourteenth resistor R14, the first end of the eighth switching tube Q8 is further connected to the anode of the second diode DS2, the cathode of the second diode DS2 is connected to the anode of the third diode DS3, the cathode of the third diode DS3 is connected to the second end of the eighth switching tube Q8, and the second end of the eighth switching tube Q8 is used for outputting the positive voltage of the energy storage module 1 when the eighth switching tube Q8 is turned on.
Referring to fig. 2 and 4, the operation principle of the output management circuit 5 is as follows: when the input power supply is not connected, under the action of the second resistor R2, the control of the first switching tube Q1 is low level, the first switching tube Q1 is turned off, at the moment, under the action of the third resistor R3, the first end of the first switching tube Q1 is high level (the high level corresponds to a first control signal), the seventh switching tube Q7 is turned on after receiving the first control signal, the first end of the seventh switching tube Q7 is low level (the low level corresponds to a second control signal), and then the control end voltage of the eighth switching tube Q8 is pulled down, the eighth switching tube Q8 is also turned on, and at the moment, the energy storage module 1 outputs the positive voltage outwards through the eighth switching tube Q8, namely, the energy storage module supplies power to all modules and circuits in the electronic tag system; when an input power supply is connected, the second end of the input protection circuit 2 is at a high level, under the action of the first resistor R1, the first switching tube Q1 is turned on, the first end of the first switching tube Q1 is at a low level, the seventh switching tube Q7 is turned off, the eighth switching tube Q8 is also turned off, and at the moment, a voltage difference exists between the positive voltage of the energy storage module 1 and a preset voltage, so that the second diode DS2 and the third diode DS3 cannot be turned on, and therefore, the preset voltage supplies power for all modules and circuits in the electronic tag system. It should be noted that, to make the second diode DS2 and the third diode DS3 conductive, the positive voltage of the energy storage module 1 needs to be greater than the preset voltage, so that the second diode DS2 and the third diode DS3 may be selected according to design requirements to ensure that the second diode DS2 and the third diode DS3 are turned off when the eighth switching tube Q8 is turned off.
In some embodiments, as shown in fig. 1, the electronic tag further includes a protection circuit 6 connected to the energy storage module 1 for preventing the energy storage module 1 from being overcharged and overdischarged.
Further, in some embodiments, as shown in fig. 5, the protection circuit 6 includes a charging protector U12, a fourth resistor R125, a first MOS transistor Q11, a second MOS transistor Q12, a thirteenth resistor R127, an eighth resistor R124, and a seventh capacitor C140. The current detection end CS of the charging protector U12 is connected to the ground through a fourth resistor R125, the charging control end OC of the charging protector U12 is connected with the grid electrode of a first MOS tube Q11, the discharging control end OD of the charging protector U12 is connected with the grid electrode of a second MOS tube Q12, the drains of the first MOS tube Q11 and the second MOS tube Q12 are connected, the source electrode of the first MOS tube Q11 is grounded, the source electrode of the second MOS tube Q12 is connected with the negative electrode of the energy storage module 1 and the grounding end of the charging protector U12, the source electrode of the first MOS tube Q11 is also connected with the source electrode of the second MOS tube Q12 through a thirteenth resistor R127, the power supply end VDD of the charging protector U12 is connected with the positive electrode of the energy storage module 1 through an eighth resistor R124, the power supply end VDD of the charging protector U12 is also connected to the ground through a seventh capacitor C140, and the grounding end VSS of the charging protector U12 is connected with the negative electrode of the energy storage module 1.
In this embodiment, as shown in fig. 5, when the positive voltage of the energy storage module 1 is greater than the overcharge voltage value, the charge control end OC of the charge protector U12 controls the first MOS transistor Q11 to be turned off, so as to inhibit the energy storage module 1 from continuing to charge, thereby playing a role in preventing overcharge; when the positive voltage of the energy storage module 1 is greater than the overdischarge voltage value, the discharge control end OD of the charge protector U12 controls the second MOS tube Q12 to be turned off, and the energy storage module 1 is prohibited from continuing to discharge, so as to play a role in preventing overdischarge. In addition, the charge protector U12 may be a battery protection chip commonly used in the art.
In some embodiments, as shown in fig. 1, the electronic tag further comprises an interface circuit 7 connected to the first end of the input protection circuit 2 for accessing an input power source. Alternatively, the interface circuit 7 includes a TypeC interface, and an input power supply can be plugged in from the forward and reverse directions.
In some embodiments, as shown in fig. 1, the electronic tag further includes a second terminal connected to the input protection circuit 2, for detecting whether the input power is connected to the input protection circuit and outputting a detection signal detection circuit 8.
Further, in some embodiments, as shown in fig. 2, the detection circuit 8 includes a second detection resistor RA2 and a first detection resistor RA1. The first end of the second detection resistor RA2 is connected with the second end of the input protection circuit 2, the second end of the second detection resistor RA2 is connected with the controller and inputs detection signals to the controller, and the second end of the second detection resistor RA2 is also connected to the ground through the first detection resistor RA1. In this embodiment, the function of the detection signal is to inform the controller whether the electronic tag is connected to the input power source, so that the input power source performs the relevant operation. The related operations include, but are not limited to, inputting a third setting level to the charge enable terminal EN of the charge manager U11, controlling the electronic tag to exit the energy saving mode, and the like.
In some embodiments, as shown in fig. 1, the electronic tag further comprises a temperature acquisition circuit 9 for detecting the ambient temperature. Further, as shown in fig. 3, the temperature acquisition circuit 9 includes a thermistor Rntc, a second end of the thermistor Rntc is connected to the temperature detection end NTC of the charging manager U11, and a first end of the thermistor Rntc is grounded. In this embodiment, the resistance value of the thermistor Rntc changes according to the change of the ambient temperature, and then the thermistor Rntc cooperates with the charging manager U11 to enable the voltage of the temperature detection end NTC of the charging manager U11 to change along with the change of the ambient temperature, and when the ambient temperature is greater than the over-temperature threshold, the charging manager U11 controls the charging current of the energy storage module 1 to decrease or stop charging, thereby avoiding the temperature of the electronic tag from continuously rising and playing a role of preventing over-temperature.
The utility model has the following beneficial effects: when an input power supply is connected, the input protection circuit is utilized to avoid damaging a later-stage circuit due to the abnormality of the input power supply, the energy storage module is charged through the charging circuit, the input voltage of the input power supply is converted into a preset voltage through the voltage stabilizing circuit, and the output management circuit switches the power supply of the electronic tag into the input power supply after the conversion of the input voltage; when the input power supply is not connected, the output management circuit switches the power supply to the energy storage module; the utility model has the charging function and the protection function, can prevent the electronic element from being damaged by overcurrent or overvoltage, surge and static electricity of the input power supply, effectively improves the safety of the circuit, and has the advantages of simple circuit structure and high reliability.
It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. An electronic tag, comprising:
an energy storage module (1) for storing electrical energy;
an input protection circuit (2) connected to the input power supply and used for avoiding damage to the subsequent circuit due to abnormality of the input power supply;
the charging circuit (3) is connected with the second end of the input protection circuit (2) and the energy storage module (1) and is used for charging the energy storage module (1) when the input power supply is connected;
the voltage stabilizing circuit (4) is connected with the second end of the input protection circuit (2) and is used for converting input voltage into preset voltage when the input power supply is connected; and
and the output management circuit (5) is connected with the energy storage module (1) and is used for switching the power supply of the electronic tag into the energy storage module (1) when the input power supply is not connected and switching the power supply into the input power supply after the input voltage conversion when the input power supply is connected.
2. Electronic tag according to claim 1, characterized in that the input protection circuit (2) comprises an overcurrent protection unit (21) and an overvoltage protection unit (22); the first end of the overcurrent protection unit (21) is the first end of the input protection circuit (2), the second end of the overcurrent protection unit (21) is the second end of the input protection circuit (2), and the second end of the overcurrent protection unit (21) is also connected with the overvoltage protection unit (22).
3. Electronic tag according to claim 1, characterized in that said output management circuit (5) comprises:
a first switch unit (51) connected with the second end of the input protection circuit (2) and used for outputting a first control signal when the input power supply is not connected;
a second switching unit (52) connected to the first switching unit (51) for outputting a second control signal when the first control signal is received; and
and a third switch unit (53) connected with the second switch unit (52) and the positive electrode of the energy storage module (1) and used for being conducted when the second control signal is received, so that the power supply is switched into the energy storage module (1).
4. An electronic tag according to claim 3, characterized in that the first switching unit (51) comprises a first resistor R1, a second resistor R2, a first switching tube Q1 and a third resistor R3; the second switching unit (52) comprises a seventh switching tube Q7, a fourth resistor R4 and a fifteenth resistor R15; the third switching unit (53) includes an eighth switching tube Q8, a fourteenth resistor R14, a second diode DS2, and a third diode DS3;
the first end of the first resistor R1 is connected with the second end of the input protection circuit (2), the second end of the first resistor R1 is connected with the control end of the first switching tube Q1 and is also connected to the ground through the second resistor R2, the first end of the first switching tube Q1 is connected with the first end of the fourth resistor R4, the first end of the first switching tube Q1 is also connected to the first direct-current voltage through the third resistor R3, and the second end of the first switching tube Q1 is grounded;
the control end of the seventh switching tube Q7 is connected with the second end of the fourth resistor R4, the second end of the seventh switching tube Q7 is grounded, the first end of the seventh switching tube Q7 is connected to the control end of the eighth switching tube Q8 through the fifteenth resistor R15, and the second end of the seventh switching tube Q7 is grounded;
the control end of the eighth switching tube Q8 is connected to a connection point between the first end of the eighth switching tube Q8 and the positive electrode of the energy storage module (1) through the fourteenth resistor R14, the first end of the eighth switching tube Q8 is further connected to the anode of the second diode DS2, the cathode of the second diode DS2 is connected to the anode of the third diode DS3, the cathode of the third diode DS3 is connected to the second end of the eighth switching tube Q8, and the second end of the eighth switching tube Q8 is used for outputting the positive voltage of the energy storage module (1) when the eighth switching tube Q8 is turned on.
5. Electronic tag according to claim 1, further comprising a temperature acquisition circuit (9) for detecting the ambient temperature;
wherein the temperature acquisition circuit (9) comprises a thermistor Rntc; the charging circuit (3) includes a charging manager U11, a ninth resistor Rt2, and a tenth resistor Rt1;
the power supply end of the charging manager U11 is connected with the second end of the input protection circuit (2), the battery connection end of the charging manager U11 is connected with the positive electrode of the energy storage module (1), the temperature detection end of the charging manager U11 is connected with the second end of the thermistor Rntc, the second end of the ninth resistor Rt2 and the second end of the tenth resistor Rt1, the first end of the thermistor Rntc and the first end of the ninth resistor Rt2 are grounded, and the first end of the tenth resistor Rt1 is connected with the second end of the input protection circuit (2).
6. Electronic tag according to claim 1, characterized in that the voltage stabilizing circuit (4) comprises a linear voltage stabilizer LDO1;
the input end of the linear voltage regulator LDO1 is connected with the second end of the input protection circuit (2), and when the input power supply is connected, the output end of the linear voltage regulator LDO1 outputs the preset voltage.
7. Electronic tag according to any of claims 1 to 6, further comprising a protection circuit (6) connected to the energy storage module (1) for preventing overcharging and overdischarging of the energy storage module (1).
8. The electronic tag according to claim 7, wherein the protection circuit (6) comprises a charge protector U12, a fourth resistor R125, a first MOS transistor Q11, a second MOS transistor Q12, and an eighth resistor R124;
the current detection end of the charging protector U12 is connected to the ground through the fourth resistor R125, the charging control end of the charging protector U12 is connected with the grid electrode of the first MOS tube Q11, the discharging control end of the charging protector U12 is connected with the grid electrode of the second MOS tube Q12, the first MOS tube Q11 is connected with the drain electrode of the second MOS tube Q12, the source electrode of the first MOS tube Q11 is grounded, the source electrode of the second MOS tube Q12 is connected with the negative electrode of the energy storage module (1) and the grounding end of the charging protector U12, and the power supply end of the charging protector U12 is connected to the positive electrode of the energy storage module (1) through the eighth resistor R124.
9. The electronic tag according to any one of claims 1 to 6, further comprising an interface circuit (7) connected to the first end of the input protection circuit (2) for accessing the input power supply; the interface circuit (7) comprises a TypeC interface.
10. Electronic tag according to any of claims 1 to 6, further comprising a detection signal detection circuit (8) connected to the second terminal of the input protection circuit (2) for detecting whether the input power source is connected to and outputting a detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322090085.4U CN220399955U (en) | 2023-08-04 | 2023-08-04 | Electronic label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322090085.4U CN220399955U (en) | 2023-08-04 | 2023-08-04 | Electronic label |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220399955U true CN220399955U (en) | 2024-01-26 |
Family
ID=89602059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322090085.4U Active CN220399955U (en) | 2023-08-04 | 2023-08-04 | Electronic label |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220399955U (en) |
-
2023
- 2023-08-04 CN CN202322090085.4U patent/CN220399955U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202712892U (en) | Battery management system and load detection circuit thereof | |
| CN102255345B (en) | Double-battery powered circuit | |
| CN203481802U (en) | Battery protective circuit and system | |
| CN112165156A (en) | Charging/discharging device, battery system, charging/discharging control method, and storage medium | |
| CN105305382A (en) | Charge and discharge protective circuit for battery | |
| CN202014087U (en) | Lithium battery charging protection circuit for portable system | |
| CN108306402A (en) | A kind of master control borad super capacitor backup power supply | |
| CN204407870U (en) | A kind of secondary battery protection circuit | |
| CN117220399B (en) | Lithium battery, solar power supply conversion circuit and conversion control method | |
| CN203456930U (en) | Compound energy system | |
| CN202997539U (en) | A super capacitor voltage balance protection circuit | |
| CN210199274U (en) | Power supply management device | |
| CN220399955U (en) | Electronic label | |
| CN203813423U (en) | Universal protection system for lithium battery | |
| CN203933057U (en) | A kind of portable multi-function portable power source | |
| CN105048606A (en) | Battery discharge protection circuit and rechargeable battery pack with discharge protection function | |
| CN209472415U (en) | Power-supply system | |
| CN204464971U (en) | Battery protecting circuit, electric energy generator and electronic installation | |
| CN210350810U (en) | Power supply charging protection device | |
| CN209419247U (en) | A kind of lithium battery high temperature automatic protection plate | |
| CN209627047U (en) | Ups power | |
| CN209402181U (en) | A kind of battery over-discharge protection circuit, communication equipment and battery | |
| CN203761120U (en) | Uninterrupted power supply circuit and electronic product | |
| CN104901363A (en) | Activation circuit and method for battery of mobile equipment | |
| CN205160169U (en) | Charging and discharging circuit and chargeable IC -card |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |