CN216546061U - General type power supply control circuit and intelligent relay - Google Patents
General type power supply control circuit and intelligent relay Download PDFInfo
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- CN216546061U CN216546061U CN202123449820.3U CN202123449820U CN216546061U CN 216546061 U CN216546061 U CN 216546061U CN 202123449820 U CN202123449820 U CN 202123449820U CN 216546061 U CN216546061 U CN 216546061U
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Abstract
The utility model discloses a universal power supply control circuit and an intelligent relay. The circuit comprises a first input end, a second input end and a control circuit, wherein the first input end is used for being connected with the positive pole of a power supply; a second input for connection to a negative pole of a power supply; the control circuit is connected with the line control circuit and the sampling circuit, generates a control signal according to an input signal of the line control circuit or compares the sampling signal of the sampling circuit with a preset voltage, and outputs the control signal according to a comparison result; and the switch circuit is connected with the control circuit, the second input end and the load and is used for switching on and off under the control of the control signal so as to control the power-on and power-off of the load. The circuit and the intelligent relay provide intelligent control and wire control for loading loads, are suitable for loading loads of vehicles with different storage battery types, and are strong in universality, convenient and practical.
Description
Technical Field
The utility model relates to the technical field of switches, in particular to a universal power supply control circuit and an intelligent relay.
Background
With the improvement of living standard of people, various riding equipment such as vehicles for riding instead of walking is more and more popular.
When a load is additionally arranged on a vehicle, a storage battery of the vehicle generally supplies power to the load, the types of the storage batteries of the vehicle are different, some use a lithium battery as a power supply, and some use a lead-acid battery as a power supply. The voltage of the lithium battery is stable, the quality of the lead-acid battery is uneven, the voltage fluctuation range of the lead-acid battery with good quality is limited, the voltage of the lead-acid battery with poor quality is shifted greatly, and different battery types of vehicles enable the relay technology of loads to put forward higher requirements.
In the conventional power supply circuit, the voltage of the input power supply is converted into the target voltage by using the voltage conversion chip and then is output to the load, and in this way, if the voltage of the input power supply fluctuates, the problem that the load is damaged because a path between the input power supply and the load cannot be closed in time exists.
In addition, the existing relay technology only based on a chip is slightly redundant in arrangement of an intelligent voltage control circuit for a lithium battery with stable voltage, and the intelligent voltage control cannot be well adapted to the situation of large voltage fluctuation of a vehicle battery.
Disclosure of Invention
Based on the above, in order to solve the technical problems in the prior art, the utility model provides a general power supply control circuit and an intelligent relay capable of selecting a relay mode, which provide two relay modes of intelligent control and line control for additionally installing a load, are suitable for expanding loads of vehicles with different storage battery types, and have strong universality, convenience and practicability.
In a first aspect, the present invention relates to a universal power supply control circuit, comprising:
a first input terminal for connection to a positive terminal of a power supply;
a second input for connection to a negative pole of a power supply;
the control circuit is connected with the line control circuit and the sampling circuit, generates a control signal according to an input signal of the line control circuit or compares the sampling signal of the sampling circuit with a preset voltage, and outputs the control signal according to a comparison result;
and the switch circuit is connected with the control circuit, the second input end and the load and is used for switching on and off under the control of the control signal so as to control the power-on and power-off of the load.
In a second aspect, the present invention relates to an intelligent relay comprising:
the general supply control circuit of the first aspect;
the universal power supply control circuit is connected with the first input end and the second input end, and comprises a first output end and a second output end, wherein the first output end is connected with the anode of the load, and the second output end is connected with the cathode of the load.
According to the universal power supply control circuit and the intelligent relay, the control circuit is connected with the two relay circuits, and a user can select different relay modes. This general type power supply control circuit and intelligent relay provide two kinds of relay modes of intelligent relay control and drive-by-wire control for installing the load additional in this embodiment to the vehicle that is applicable to different storage battery types expands the dress load, greatly improves the commonality, and the vehicle of different grade type all can install safely additional and control the load, convenient and practical.
According to the universal power supply control circuit and the intelligent relay, the drive-by-wire circuit is provided with the filter capacitor, so that the power supply signal of the vehicle ACC line is output to a chip of the control circuit after being filtered in the voltage reduction transmission process, current mutation and electromagnetic interference generated by the power supply signal are effectively prevented, the electromagnetic interference is restrained from the source, and the stability of signal data is ensured.
In addition, the general power supply control circuit and the intelligent relay are provided with the temperature fuse at the power output end, and when the temperature of the power tube is abnormal, for example, the high-power tube fails and fires, the temperature fuse is fused to play a protective role.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
fig. 1 is a schematic circuit diagram of an intelligent relay according to an embodiment of the present application;
FIG. 2 is an exemplary circuit schematic of a line control circuit of the universal power supply control circuit shown in FIG. 1;
FIG. 3 is an exemplary circuit diagram of a sampling and switching circuit of the general power supply control circuit shown in FIG. 1;
fig. 4 is a circuit schematic diagram of an anti-reverse connection circuit of the general power supply control circuit of the embodiment;
FIG. 5 is an exemplary circuit diagram of a reverse connection prevention circuit of the universal power supply control circuit shown in FIG. 4;
FIG. 6 is a schematic circuit diagram of a voltage stabilizing circuit of the intelligent relay according to the present embodiment;
FIG. 7 is an exemplary circuit diagram of a voltage regulator circuit of the universal power supply control circuit shown in FIG. 6;
fig. 8 is an exemplary circuit schematic diagram of an indication circuit of the general power supply control circuit of the present embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a general power supply control circuit of the present embodiment is shown, in which an intelligent relay is used as a controller bridge circuit to connect a voltage and a load, and the internal circuit structure is the same.
The general power supply control circuit comprises a first input terminal 110, wherein the first input terminal 110 is used for being connected with the positive pole of the power supply 10; a second input 120, the second input 120 being adapted to be connected to the negative pole of the power supply 10; the control circuit 300 is connected with the sampling circuit 200 for intelligent power supply, the control circuit 300 is connected with the line control circuit 800, the control circuit 300 is used for comparing the sampling signal with a preset voltage and outputting a control signal according to the comparison result or the control circuit 300 generates the control signal according to the input signal of the line control circuit 800; and a switch circuit, the switch circuit is connected to the control circuit, the second input terminal and the load, and the switch circuit 400 is used for switching on and off under the control of the control signal to control the power-on and power-off of the load.
The general type power supply control circuit and the intelligent relay of this embodiment set up two kinds of relay circuit at control circuit. The user can select different relay modes by himself. The general power supply control circuit and the intelligent relay of the embodiment provide two relay modes of intelligent relay control and line control for the load 20.
The intelligent relay control part at least comprises a sampling circuit 200, a control circuit 300 and a switch circuit 400. In order to provide more functions, the intelligent relay control part further includes one or more of the following module circuits, such as a thermal fuse 900, an anti-reverse connection circuit 500, a voltage stabilizing circuit 600, and an indication circuit 700.
The relay-by-wire part at least comprises a relay-by-wire circuit 800, a control circuit 300 and a switch circuit 400. In order to provide more functions, the relay-by-wire part further includes one or more of the following module circuits, such as a thermal fuse 900, an anti-reverse connection circuit 500, a voltage stabilizing circuit 600, and an indication circuit 700.
The general type power supply control circuit and the intelligent relay of this embodiment can be applicable to the vehicle of different storage battery types and expand the dress load, greatly improve the commonality.
The storage battery types of the vehicles are different, some use lithium batteries as power supplies, and some use lead-acid batteries as power supplies. In the prior scheme, the voltage of the lithium battery power supply is stable, the ACC line connected to the vehicle is selected without any fluctuation or change basically, and the drive-by-wire control is realized by the ignition switch of the vehicle. The lead-acid battery with good quality has a limited voltage fluctuation range, generally between 12.8V and 13.6V, and intelligent relay control is selected, so that an ACC (adaptive control) line of a vehicle is not required to be connected. If the voltage of the lead-acid battery with poor quality is shifted to be particularly large, the drive-by-wire control is selected, and no matter how large the voltage fluctuation of the ACC line connected to the vehicle is, the drive-by-wire input signal sent to the control circuit is basically kept at 5V through voltage reduction and filtering of the drive-by-wire circuit of the embodiment.
The general type power supply control circuit or the intelligent relay is provided with a temperature fuse 900. The thermal fuse 900 connects the switching circuit 400 and the load 20. By arranging the temperature fuse 900 at the power output end, when the temperature of the power tube is abnormal, for example, the high-power tube fails and fires, the temperature fuse is fused to play a protection role.
Referring to fig. 2, the drive-by-wire circuit 800 includes a fifth switch Q5, a collector of which is connected to the control circuit 300, an emitter of which is grounded, and a base of which is connected to the ACC line of the vehicle through a series-connected voltage-dividing resistor, such as a seventh resistor R7 and an eighth resistor R8. The fifth switch Q5 is provided with a bias resistor R10 and a filter capacitor C6. The drive-by-wire circuit 800 is provided with a filter capacitor C6, so that the power signals of the vehicle ACC line are filtered simultaneously in the voltage reduction transmission process and then output to the chip of the control circuit 300, and current sudden change and electromagnetic interference generated by the power signals are effectively prevented.
Referring to fig. 3, the common part of the line-controlled relay and the intelligent relay includes a control circuit 300, a switch circuit 400, an anti-reverse connection circuit 500, a voltage stabilizing circuit 600, and an indication circuit 700.
In the aspect of intelligent control, the power supply control circuit 300 collects the voltage of the power supply 10, compares the voltage of the power supply 10 with a preset voltage, and controls the connection between the power supply 10 and the load 20 according to the comparison result, that is, controls the power-on and power-off of the load 20, when the voltage of the power supply 10 fluctuates, the control circuit 300 disconnects the connection between the power supply 10 and the load 20, and the problem that the load 20 is damaged due to the fluctuation of the voltage of the power supply 10 is avoided.
In the aspect of controlling the relay, the power supply control circuit 300 receives an input signal from the ACC line and subjected to voltage reduction filtering, and generates a control signal for controlling the switch circuit 400, and the switch circuit 400 controls the connection between the power supply 10 and the load 20 according to the control signal, that is, controls the power-on and power-off of the load 20.
The control circuit 300 in this embodiment may be formed by a device or a chip having a voltage comparison function, and the conventional option may be a voltage comparator, a single chip, or the like. Optionally, the control circuit 300 in this embodiment is a single chip microcomputer of a type HT66F007, and it can be understood that it is a conventional technique to compare a preset voltage in the single chip microcomputer with a voltage value of the acquired sampling signal, and output a high-low level as a control signal according to a comparison result. In other embodiments, other types of singlechips or voltage comparators may be used.
The switch circuit 400 in this embodiment may be formed by a controllable switch such as a switch tube, please refer to fig. 3, in an embodiment, the switch circuit 400 includes: a first switch tube Q1, wherein a control terminal of the first switch tube Q1 is connected to the control circuit 300, an input terminal of the first switch tube Q1 is connected to a negative electrode of the load 20, an output terminal of the first switch tube Q1 is connected to the second input terminal 120, when the first switch tube Q1 is turned on, a path is formed between the power supply 10 and the load 20 and the switch circuit 400, and the power supply 10 powers on the load 20; conversely, when the first switching tube Q1 is turned off, the power source 10 is disconnected from the load 20.
Optionally, the switch circuit 400 further includes a second switch tube Q2 and a third resistor R3, a first end of the third resistor R3 is connected to the control circuit 300, a control end of the first switch tube Q1 and a control end of the second switch tube Q2, an input end of the second switch tube Q2 is connected to the input end of the first switch tube Q1 and the negative electrode of the load 20, and an output end of the second switch tube Q2 is connected to the output end of the first switch tube Q1 and the second input end 120.
The first switch tube Q1 and the second switch tube Q2 of this embodiment are NMOS tubes, wherein a gate of the NMOS tube is a control end of the switch tube, a drain of the NMOS tube is an input end of the switch tube, and a source of the NMOS tube is an output end of the switch tube, when a control signal is at a high level, the first switch tube Q1 and the second switch tube Q2 are turned on, and when the control signal is at a low level, the first switch tube Q1 and the second switch tube Q2 are turned off. In other embodiments, a PMOS transistor, a triode, or the like may also be used as the switching transistor.
Referring to fig. 4, in an embodiment, the power supply further includes an anti-reverse connection circuit 500, the anti-reverse connection circuit 500 is connected to the first input terminal 110, the second input terminal 120 and the load 20, and the anti-reverse connection circuit 500 is configured to close or open the connection between the power supply 10 and the load 20 according to the connection between the positive pole and the negative pole of the power supply 10 and the first input terminal 110 and the second input terminal 120.
The reverse connection prevention circuit 500 may be formed by a controllable switch, and optionally, referring to fig. 5, in one embodiment, the reverse connection prevention circuit 500 includes: a first diode D1, a second diode D2, a third switch Q3, and a fourth resistor R4, wherein a first end of the fourth resistor R4 is connected to the first input terminal 110, a second end of the fourth resistor R4 is connected to an anode of the first diode D1 and a control terminal of the third switch Q3, a cathode of the first diode D1 is connected to a cathode of the second diode D2, an anode of the second diode D2 is connected to an output terminal of the third switch Q3 and the second input terminal 120, and an input terminal of the third switch Q3 is connected to a cathode of the load 20. Optionally, the reverse connection preventing circuit 500 further includes a fourth switch tube Q4, a control end of the fourth switch tube Q4 is connected to the anode of the first diode D1, the second end of the fourth resistor R4, and the control end of the third switch tube Q3, an input end of the fourth switch tube Q4 is connected to the cathode of the load 20, and an output end of the fourth switch tube Q4 is connected to the second input end 120.
In this embodiment, the third switch transistor Q3 and the fourth switch transistor Q4 are NMOS transistors, wherein a gate of the NMOS transistor is a control terminal of the switch transistor, a drain of the NMOS transistor is an input terminal of the switch transistor, and a source of the NMOS transistor is an output terminal of the switch transistor. When the power supply control circuit 300 is normally connected to the power supply 10, that is, the first input terminal 110 is connected to the positive electrode of the power supply 10, and the second input terminal 120 is connected to the negative electrode of the power supply 10, at this time, the third switching tube Q3 and the fourth switching tube Q4 are turned on, and the power supply 10 is normally connected to the load 20. When the power supply control circuit 300 is reversely connected with the power supply 10, that is, when the first input terminal 110 is connected to the negative pole of the power supply 10 and the second input terminal 120 is connected to the positive pole of the power supply 10, the third switching tube Q3 and the fourth switching tube Q4 are cut off, and the connection between the power supply 10 and the load 20 is disconnected, so that the power supply 10 and the load 20 are prevented from being damaged due to the reverse connection of the power supply 10.
Referring to fig. 6, in an embodiment, the power supply further includes a voltage stabilizing circuit 600, the voltage stabilizing circuit 600 is connected to the first input terminal 110 and the control circuit 300, and the voltage stabilizing circuit 600 is configured to convert the voltage of the power supply 10 into a target voltage to supply power to the control circuit 300.
The voltage stabilizing circuit 600 may be formed by a voltage stabilizing chip, for example, in this embodiment, the voltage stabilizing chip is HT 7550-2. Referring to fig. 7, in one embodiment, the voltage stabilizing circuit 600 includes a third diode D3, a fourth diode D4, a fifth resistor R5, the voltage stabilizing circuit comprises a second capacitor C2, a third capacitor C3 and a voltage stabilizing chip, wherein the anode of a third diode D3 is connected with the first input end 110, the cathode of a third diode D3 is connected with the cathode of a fourth diode D4, the anode of a fourth diode D4 is connected with the first end of a fifth resistor R5, the second end of a fifth resistor R5 is connected with the first end of a second capacitor C2 and the input end (VIN pin) of the power supply 10 of the voltage stabilizing chip, the second end of the second capacitor C2 is grounded, the output end (OUT pin) of the power supply 10 of the voltage stabilizing chip and the first end of a third capacitor C3 are connected with the output end of the voltage stabilizing circuit 600 in common, the output end of the voltage stabilizing circuit 600 is connected with the control circuit 300, the second end of a third capacitor C3 is grounded, and the ground end (GND pin) of the voltage stabilizing chip is grounded.
Referring to fig. 8, in an embodiment, the apparatus further includes an indication circuit 700, the indication circuit 700 is connected to the first input terminal 110 and the input terminal of the switch circuit 400, and the indication circuit 700 is used for indicating on/off of the switch circuit 400. In one embodiment, the indication circuit 700 includes a light emitting diode D5 and a sixth resistor R6, wherein an anode of the light emitting diode D5 is connected to the first input terminal 110, a cathode of the light emitting diode D5 is connected to a first terminal of the sixth resistor R6, and a second terminal of the sixth resistor R6 is connected to the input terminal of the switch circuit 400. It should be understood that when the power supply 10 normally powers the load 20, i.e. the switch circuit 400 is turned on and the reverse connection preventing circuit 500 is turned on, the light emitting diode D5 is bright, which represents that the circuit is normal; when the power supply 10 cannot power up the load 20 when the switch circuit 400 is turned off or the reverse connection preventing circuit 500 is turned off, the light emitting diode D5 is extinguished.
The above is the introduction of the common circuit part for line control relay and intelligent control. The circuit principle and structure in the intelligent relay mode are described below with reference to the drawings.
The intelligent relay control part at least comprises a sampling circuit 200, a control circuit 300 and a switch circuit 400. In order to provide more functions, the intelligent relay control part further includes one or more of the following module circuits, such as a thermal fuse 900, an anti-reverse connection circuit 500, a voltage stabilizing circuit 600, and an indication circuit 700.
The sampling signal may be a voltage signal and the control signal may be a level signal. The preset voltage is a voltage corresponding to the sampling signal output by the sampling circuit 200 under the condition of the standard voltage.
Referring to fig. 3, the sampling circuit 200 in the present embodiment may be formed by devices with voltage acquisition functions, such as a sampling resistor and a voltage sensor. In one embodiment, the sampling circuit 200 includes: the sampling circuit comprises a first resistor R1, a second resistor R2 and a first capacitor C1, wherein a first end of the first resistor R1 is connected with the first input end 110, a second end of the first resistor R1 is connected with a first end of the second resistor R2 and a first end of the first capacitor C1, a first end of the second resistor R2 serving as a signal output end of the sampling circuit 200 is connected with the control circuit 300, and a second end of the second resistor R2 and a second end of the first capacitor C1 are connected to the ground in common.
A second aspect of embodiments of the present application provides an intelligent relay.
The intelligent relay includes a universal power supply control circuit as previously described.
The general power supply control circuit is connected with a first input end and a second input end, the first input end is connected with the anode of the power supply 10, and the second input end is connected with the cathode of the power supply 10. The universal power supply control circuit includes a first output terminal and a second output terminal. The first output terminal is connected to the positive pole of the load 20, and the second output terminal is connected to the negative pole of the load 20.
While the utility model has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the utility model is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A universal power supply control circuit, comprising:
a first input terminal for connection to a positive pole of a power supply;
a second input for connection to a negative pole of a power supply;
the control circuit is connected with the line control circuit and the sampling circuit, generates a control signal according to an input signal of the line control circuit or compares the sampling signal of the sampling circuit with a preset voltage, and outputs the control signal according to a comparison result;
and the switch circuit is connected with the control circuit, the second input end and the load and is used for switching on and off under the control of the control signal so as to control the power-on and power-off of the load.
2. The universal power supply control circuit as claimed in claim 1, further comprising a temperature fuse connecting the switching circuit and the load.
3. The general power supply control circuit according to claim 2, wherein the drive-by-wire circuit comprises a fifth switching tube, a collector of the fifth switching tube is connected with the control circuit, an emitter of the fifth switching tube is grounded, a base of the fifth switching tube is connected with an ACC line of the vehicle through a series-connected voltage dividing resistor, and the fifth switching tube is provided with a bias resistor and a filter capacitor.
4. The general power supply control circuit according to claim 1, wherein the switch circuit includes a first switch tube, a second switch tube and a third resistor, a control terminal of the first switch tube is connected to the control circuit, an input terminal of the first switch tube is connected to the negative electrode of the load, an output terminal of the first switch tube is connected to the second input terminal, a first terminal of the third resistor is connected to the control circuit, the control terminal of the first switch tube and the control terminal of the second switch tube, an input terminal of the second switch tube is connected to the input terminal of the first switch tube and the negative electrode of the load, and an output terminal of the second switch tube is connected to the output terminal of the first switch tube and the second input terminal.
5. The general power supply control circuit according to claim 1, wherein the sampling circuit comprises: the first end of the first resistor is connected with the first input end, the second end of the first resistor is connected with the first end of the second resistor and the first end of the first capacitor, the first end of the second resistor serves as the signal output end of the sampling circuit and the control circuit, and the second end of the second resistor is connected with the second end of the first capacitor in a common mode.
6. The general power supply control circuit according to claim 1, further comprising an anti-reverse connection circuit, wherein the anti-reverse connection circuit is connected to the first input terminal, the second input terminal and the load, and the anti-reverse connection circuit is configured to close or open the connection between the power supply and the load according to the connection between the positive electrode and the negative electrode of the power supply and the first input terminal and the second input terminal.
7. The universal power supply control circuit according to claim 1, further comprising a voltage regulator circuit connected to the first input terminal and the control circuit, the voltage regulator circuit being configured to convert a voltage of the power supply to a target voltage for powering the control circuit.
8. The universal power supply control circuit according to claim 7, wherein said voltage regulator circuit comprises: the high-voltage power supply comprises a third diode, a fourth diode, a fifth resistor, a second capacitor, a third capacitor and a voltage stabilizing chip, wherein the anode of the third diode is connected with the first input end, the cathode of the third diode is connected with the cathode of the fourth diode, the anode of the fourth diode is connected with the first end of the fifth resistor, the second end of the fifth resistor is connected with the first end of the second capacitor and the power input end of the voltage stabilizing chip, the second end of the second capacitor is grounded, the power output end of the voltage stabilizing chip and the first end of the third capacitor are connected together to form the output end of the voltage stabilizing circuit, the output end of the voltage stabilizing circuit is connected with the control circuit, and the second end of the third capacitor is grounded.
9. The general power supply control circuit according to claim 1, further comprising an indication circuit, the indication circuit being connected to the first input terminal and the input terminal of the switch circuit, the indication circuit being configured to indicate on/off of the switch circuit.
10. An intelligent relay, comprising:
the universal supply control circuit of any of claims 1-9;
the general power supply control circuit is connected with the first input end and the second input end, the general power supply control circuit comprises a first output end and a second output end, the first output end is connected with the anode of the load, and the second output end is connected with the cathode of the load.
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| CN202123449820.3U CN216546061U (en) | 2021-12-31 | 2021-12-31 | General type power supply control circuit and intelligent relay |
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| CN202123449820.3U CN216546061U (en) | 2021-12-31 | 2021-12-31 | General type power supply control circuit and intelligent relay |
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