CN212808421U - Bidirectional power supply display device with button battery for generator - Google Patents
Bidirectional power supply display device with button battery for generator Download PDFInfo
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- CN212808421U CN212808421U CN202021521724.8U CN202021521724U CN212808421U CN 212808421 U CN212808421 U CN 212808421U CN 202021521724 U CN202021521724 U CN 202021521724U CN 212808421 U CN212808421 U CN 212808421U
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Abstract
A bidirectional power supply display device with a button battery for a generator belongs to the technical field of generator display devices. The utility model discloses a resistance-capacitance step-down rectifier circuit, chip control circuit, voltage detection circuit, two-way power supply circuit, outside supply voltage sampling circuit, and reference voltage sampling circuit, resistance-capacitance step-down rectifier circuit links to each other with reference voltage sampling circuit, reference voltage sampling circuit links to each other with chip control circuit and outside supply voltage sampling circuit respectively, two-way power supply circuit links to each other with outside supply voltage sampling circuit, voltage detection circuit links to each other with resistance-capacitance step-down rectifier circuit and chip control circuit respectively. The utility model discloses possess simultaneously and hold two kinds of power supply modes of step-down rectifier circuit power supply and button cell power supply, when holding step-down rectifier circuit power supply, button cell is out of work, not power consumptive, has improved button cell's life.
Description
Technical Field
The utility model belongs to the technical field of the generator display device, specifically be relate to a generator is with two-way power supply display device who takes button cell.
Background
At present, a display device used on a generator generally adopts a generator main winding to supply power or a button battery to supply power, and if the generator main winding is adopted to supply power, the display device can be started to work after the generator runs; if the button battery is used for supplying power, the display device always runs in a power-consuming mode, the requirement on the button battery is high, and a double power supply circuit with a complex structure and high cost is adopted. Accordingly, there is a need for improvements in existing display devices.
Disclosure of Invention
The utility model mainly solves the technical problem existing in the prior art and provides a bidirectional power supply display device with a button cell for a generator.
The above technical problem of the present invention can be solved by the following technical solutions: the utility model provides a generator is with two-way power supply display device who takes button cell, includes resistance-capacitance step-down rectifier circuit, chip control circuit, voltage detection circuit, two-way power supply circuit, outside supply voltage sampling circuit and reference voltage sampling circuit, resistance-capacitance step-down rectifier circuit links to each other with reference voltage sampling circuit, reference voltage sampling circuit links to each other with chip control circuit and outside supply voltage sampling circuit respectively, two-way power supply circuit links to each other with outside supply voltage sampling circuit, voltage detection circuit links to each other with resistance-capacitance step-down rectifier circuit and chip control circuit respectively.
Preferably, the reference voltage sampling circuit comprises a resistor R4, a resistor R5, a resistor R6, a capacitor C9, an integrated chip Q2 and a thyristor D1, the integrated chip Q2 is CJ431 in model, the cathode of the integrated chip Q2 is respectively connected with the output end of the resistor-capacitor step-down rectification circuit and one end of the resistor R4, the reference electrode of the integrated chip Q2 is respectively connected with the other end of the resistor R4 and the cathode of the thyristor D1, the anode of the integrated chip Q2 is respectively connected with one end of the resistor R5 and an external power supply voltage sampling circuit, the other end of the resistor R5 is respectively connected with the control electrode of the thyristor D1, one end of the resistor R6 and one end of the capacitor C9, the common connection of the resistor R6326 is connected with the chip control circuit, the anode of the thyristor D1 is respectively connected with the other end of the resistor R6, the other end of the capacitor C9 and the external power supply voltage.
Preferably, the external power supply voltage sampling circuit comprises a resistor R11, a resistor R12 and a capacitor C13, one end of the resistor R11 is respectively connected with the reference voltage sampling circuit and the bidirectional power supply circuit, the other end of the resistor R11 is respectively connected with one end of a resistor R12 and one end of a capacitor C11, the common connection of the resistor R11 and the one end of the capacitor C11 is connected with the chip control circuit, and the other end of the resistor R12 is respectively connected with the other end of the capacitor C13 and the reference voltage sampling circuit.
Preferably, the bidirectional power supply circuit comprises a capacitor C6, a capacitor C8, a capacitor C10, a diode D2, a diode D4 and a button cell, wherein the anode of the button cell is connected with the anode of the diode D4, the cathode of the diode D4 is respectively connected with the cathode of the diode D2 and one end of the capacitor C10, the other end of the capacitor C10 is respectively connected with the cathode of the button cell and the ground, the anode of the diode D2 is respectively connected with one end of the capacitor C6, one end of the capacitor C8 and the external power supply voltage sampling circuit, and the other end of the capacitor C6 and the other end of the capacitor C8 are both grounded.
The utility model discloses beneficial effect who has: the utility model discloses possess simultaneously and hold two kinds of power supply modes of step-down rectifier circuit power supply and button cell power supply, when holding step-down rectifier circuit power supply, button cell is out of work, not power consumptive, has improved button cell's life. The utility model discloses an adopt reference voltage sampling circuit's design, control chip MCU records integrated chip CJ 431's reference voltage and regards it as the inside comparison benchmark of control chip MCU to effectively avoid the measurement deviation because of ambient temperature changes and arouse. The utility model discloses a state that the generator was located can effectively be known to outside power supply voltage sampling circuit's design, and when the generator was not in operation, outside voltage did not have the input, does not have outside power supply voltage, and control chip MCU closes inside comparison benchmark to can effectively avoid causing control chip MCU sampling error to lead to the display screen to show in disorder because of noise interference.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a resistance-capacitance voltage reduction rectifying circuit; 2. a chip control circuit; 3. a voltage detection circuit; 4. a bidirectional power supply circuit; 5. an external supply voltage sampling circuit; 6. reference voltage sampling circuit.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example (b): the utility model provides a two-way power supply display device of taking button cell for generator, as shown in figure 1, includes resistance-capacitance step-down rectifier circuit 1, chip control circuit 2, voltage detection circuit 3, two-way power supply circuit 4, external power supply voltage sampling circuit 5 and reference voltage sampling circuit 6, resistance-capacitance step-down rectifier circuit 1 links to each other with reference voltage sampling circuit 6, reference voltage sampling circuit 6 links to each other with chip control circuit 2 and external power supply voltage sampling circuit 5 respectively, two-way power supply circuit 4 links to each other with external power supply voltage sampling circuit 5, voltage detection circuit 3 links to each other with resistance-capacitance step-down rectifier circuit 1 and chip control circuit 2 respectively. The chip control circuit 2 comprises a control chip MCU and a display screen, the display screen is connected with the control chip MCU, and the control chip MCU is provided with a reference voltage end (namely VREF), a power supply voltage end (namely I _ VCC) and a voltage detection end.
The resistance-capacitance step-down rectifying circuit 1 comprises a rectifying bridge stack DA1, a resistor R1, a resistor R2, a capacitor C1, a capacitor C3, a capacitor C5 and a TVS tube D3, wherein the rectifying bridge stack DA1 is provided with 4 connecting ends which are respectively a first input end, a second input end, a first output end and a second output end, the first input end and the second input end of the rectifying bridge stack DA1 are respectively used as the first input end and the second input end of the resistance-capacitance step-down rectifying circuit 1, the first input end and the second input end of the rectifying bridge stack DA1 are externally connected with a generator main winding, the capacitor C1 is connected in series with the first input end of the rectifying bridge stack DA1, the resistor R1 is connected in parallel with the capacitor C1, the first output end and the second output end of the rectifying bridge stack DA1 are respectively used as the first output end and the second output end of the resistance-capacitance step-down rectifying circuit 1, the resistor R2 is connected in series with the first output end of the rectifying bridge stack DA, The TVS tube D3 and the capacitor C5 are connected in parallel on the first output end and the second output end, and the second output end of the rectifier bridge stack DA1 is grounded.
The voltage detection circuit 3 comprises a diode D6, a resistor R9, a resistor R10 and a capacitor C2, the anode of the diode D6 is connected with the first input end of a rectifier bridge DA1, the cathode of the diode D6 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with one end of a capacitor C2 and one end of a resistor R10 respectively, the common connection end of the resistor R9 is connected with the voltage detection end of the MCU, and the other end of the resistor R10 is connected with the other end of the capacitor C2 and the ground respectively.
The bidirectional power supply circuit 4 comprises a capacitor C6, a capacitor C8, a capacitor C10, a diode D2, a diode D4 and a button cell, the anode of the button cell is connected with the anode of a diode D4, the cathode of a diode D4 is respectively connected with the cathode of a diode D2 and one end of the capacitor C10, the other end of a capacitor C10 is respectively connected with the cathode of the button cell and the ground, the anode of the diode D2 is respectively connected with one end of a capacitor C6, one end of the capacitor C8 and the external power supply voltage sampling circuit 5, and the other end of the capacitor C6 and the other end of the capacitor C8 are all grounded. The diode D2 and the diode D4 have a one-way cutoff function, and can avoid power consumption of the button cell when external input voltage exists.
External power supply voltage sampling circuit 5 includes resistance R11, resistance R12 and electric capacity C13, resistance R11's one end connects reference voltage sampling circuit 6 and diode D2's positive pole respectively, resistance R11's the other end connects resistance R12's one end and electric capacity C11's one end respectively, and its common connection termination control chip MCU's supply voltage end, resistance R12's the other end connects electric capacity C13's the other end and reference voltage sampling circuit 6 respectively.
The reference voltage sampling circuit 6 comprises a resistor R4, a resistor R5, a resistor R6, a capacitor C9, an integrated chip Q2 and a thyristor D1, the type of the integrated chip Q2 is CJ431, the cathode of the integrated chip Q2 is respectively connected with one end of the resistor R4 and the first output end of a rectifier bridge stack DA1, the reference electrode of the integrated chip Q2 is respectively connected with the other end of the resistor R4 and the cathode of the thyristor D1, the anode of the integrated chip Q2 is respectively connected with one end of the resistor R5 and one end of the resistor R11, the other end of the resistor R5 is respectively connected with the control electrode of the thyristor D1, one end of the resistor R6 and one end of the capacitor C9, the common connection end of the resistor is connected with the reference voltage end of the control chip MCU, the anode of the thyristor D1 is respectively connected with the other end of the resistor R6, the other end of the capacitor C9 and the other end of the resistor R12.
When the generator does not operate, the external voltage is not input, the button battery supplies power to the control chip MCU, and the display screen displays information such as accumulated time; when the generator operates, external voltage is input, the resistance-capacitance voltage reduction rectifying circuit 1 supplies power to the control chip MCU, and the button cell does not work and consumes no power.
Under the condition of large temperature change, the reference voltage of the integrated chip CJ431 has small change, but the voltage drop of the diode D2 has large change, so that large fluctuation of the MCU supply voltage of the control chip is caused, and large deviation of the measurement voltage occurs. The utility model discloses an adopt reference voltage sampling circuit 6's design, control chip MCU records integrated chip CJ 431's reference voltage and regards it as the inside comparison benchmark of control chip MCU to effectively avoid the measurement deviation because of ambient temperature changes and arouse.
In the prior art, due to the fact that noise interference around the generator is large, sampling errors of a control chip MCU are caused frequently, and therefore the situation that a display screen displays in a mess mode is caused. The utility model discloses an adopt the design of outside supply voltage adoption circuit, can effectively tell the state that the generator is located, when the generator does not operate, outside voltage does not have the input, does not have outside supply voltage, and control chip MCU closes inside comparison benchmark to can effectively avoid causing control chip MCU sampling error to lead to the display screen to show in disorder because of noise interference.
To sum up, the utility model discloses possess simultaneously and hold two kinds of power supply modes of buck rectifier circuit power supply and button cell power supply, when the power supply of buck rectifier circuit, button cell is out of work, not power consumptive, has improved button cell's life. The utility model discloses an adopt reference voltage sampling circuit's design, control chip MCU records integrated chip CJ 431's reference voltage and regards it as the inside comparison benchmark of control chip MCU to effectively avoid the measurement deviation because of ambient temperature changes and arouse. The utility model discloses a state that the generator was located can effectively be known to outside power supply voltage sampling circuit's design, and when the generator was not in operation, outside voltage did not have the input, does not have outside power supply voltage, and control chip MCU closes inside comparison benchmark to can effectively avoid causing control chip MCU sampling error to lead to the display screen to show in disorder because of noise interference.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.
Claims (4)
1. The utility model provides a generator is with two-way power supply display device who takes button cell which characterized in that, includes resistance-capacitance step-down rectifier circuit, chip control circuit, voltage detection circuit, two-way power supply circuit, external supply voltage sampling circuit and reference voltage sampling circuit, resistance-capacitance step-down rectifier circuit links to each other with reference voltage sampling circuit, reference voltage sampling circuit links to each other with chip control circuit and external supply voltage sampling circuit respectively, two-way power supply circuit links to each other with external supply voltage sampling circuit, voltage detection circuit links to each other with resistance-capacitance step-down rectifier circuit and chip control circuit respectively.
2. The button cell-equipped bidirectional power supply display device for the generator as claimed in claim 1, wherein the reference voltage sampling circuit comprises a resistor R4, a resistor R5, a resistor R6, a capacitor C9, an integrated chip Q2 and a thyristor D1, the integrated chip Q2 is CJ431, the cathode of the integrated chip Q2 is connected to the output terminal of the RC step-down rectification circuit and one terminal of the resistor R4, the reference electrode of the integrated chip Q2 is connected to the other terminal of the resistor R4 and the cathode of the thyristor D1, the anode of the integrated chip Q2 is connected to one terminal of the resistor R5 and the external power supply voltage sampling circuit, the other terminal of the resistor R5 is connected to the control electrode of the thyristor D1, one terminal of the resistor R6 and one terminal of the capacitor C9, and the common connection terminal thereof is connected to the chip control circuit, the anode of the thyristor D1 is connected to the other terminal of the resistor R6, the other terminal of the capacitor C9 and the external power supply voltage sampling circuit, and its common connection is grounded.
3. The button cell-equipped bidirectional power supply display device for the generator as claimed in claim 1, wherein the external power supply voltage sampling circuit comprises a resistor R11, a resistor R12 and a capacitor C13, one end of the resistor R11 is respectively connected with the reference voltage sampling circuit and the bidirectional power supply circuit, the other end of the resistor R11 is respectively connected with one end of a resistor R12 and one end of a capacitor C11, a common connection of the resistor R11 and the capacitor C11 is connected with the chip control circuit, and the other end of the resistor R12 is respectively connected with the other end of the capacitor C13 and the reference voltage sampling circuit.
4. The button cell-equipped bidirectional power supply display device for the generator as claimed in claim 1, wherein the bidirectional power supply circuit comprises a capacitor C6, a capacitor C8, a capacitor C10, a diode D2, a diode D4 and a button cell, wherein an anode of the button cell is connected to an anode of a diode D4, a cathode of a diode D4 is respectively connected to a cathode of the diode D2 and one end of the capacitor C10, the other end of the capacitor C10 is respectively connected to a cathode of the button cell and ground, an anode of the diode D2 is respectively connected to one end of a capacitor C6, one end of the capacitor C8 and an external power supply voltage sampling circuit, and the other end of the capacitor C6 and the other end of the capacitor C8 are both grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021521724.8U CN212808421U (en) | 2020-07-24 | 2020-07-24 | Bidirectional power supply display device with button battery for generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021521724.8U CN212808421U (en) | 2020-07-24 | 2020-07-24 | Bidirectional power supply display device with button battery for generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212808421U true CN212808421U (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021521724.8U Active CN212808421U (en) | 2020-07-24 | 2020-07-24 | Bidirectional power supply display device with button battery for generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212808421U (en) |
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- 2020-07-24 CN CN202021521724.8U patent/CN212808421U/en active Active
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