CN211180588U - Control circuit applied to face cleaning tool - Google Patents
Control circuit applied to face cleaning tool Download PDFInfo
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- CN211180588U CN211180588U CN201922244148.0U CN201922244148U CN211180588U CN 211180588 U CN211180588 U CN 211180588U CN 201922244148 U CN201922244148 U CN 201922244148U CN 211180588 U CN211180588 U CN 211180588U
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- chip microcomputer
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Abstract
The utility model relates to a be applied to control circuit of clean face instrument, including the singlechip, charge management chip and drive control circuit who is connected with the singlechip respectively, the singlechip is connected with the battery of clean face instrument, and the singlechip passes through switch S1The negative pole of the battery is connected, the charging management chip is respectively connected with the USB connecting terminal and the battery of the face cleaning tool, and the driving control circuit comprises an electronic switch Q1The electronic switch Q1The control electrode is connected with the single chip microcomputer, the drain electrode is grounded, the motor is connected between the source electrode and the positive electrode of the battery, and the single chip microcomputer is also connected with the USB connecting terminal. The utility model discloses an in clean face instrument control circuitThe charging management chip is arranged, the charging process of the battery is monitored by utilizing the charging management chip, the voltage of the battery is detected while the battery is charged, the charging current is adjusted according to the voltage of the battery, and the phenomenon of overcharging or insufficient charging is avoided.
Description
The technical field is as follows:
the utility model relates to a be applied to clean face instrument's control circuit.
Background art:
the chargeable face cleaning tools such as shavers, blackhead suction instruments and the like in the market at present have single charging protection, and only when full charge is detected, the charging is stopped, so that the possibility of damaging the battery exists, the danger of explosion caused by overhigh temperature of the battery due to overcharging exists, in the using process, the under-voltage protection of the battery is not accurate enough, and the danger of damaging the battery due to overdischarge exists.
The utility model has the following contents:
the utility model discloses the technical problem that will solve is: the charging and discharging processes of the face cleaning tool can be effectively controlled, and damage to the battery due to overcharge and overdischarge is avoided.
In order to solve the technical problem, the utility model discloses a technical scheme is: control circuit applied to face cleaning tool comprises a single chip microcomputer, a charging management chip and a driving control circuit, wherein the charging management chip and the driving control circuit are respectively connected with the single chip microcomputer, the single chip microcomputer is connected with a battery of the face cleaning tool, and the single chip microcomputer passes through a switch S1The negative pole of the battery is connected, the charging management chip is respectively connected with the USB connecting terminal and the battery of the face cleaning tool, and the driving control circuit comprises an electronic switch Q1The electronic switch Q1The control electrode is connected with the single chip microcomputer, the drain electrode is grounded, the motor is connected between the source electrode and the positive electrode of the battery, and the single chip microcomputer is also connected with the USB connecting terminal.
As a preferred scheme, a resistor R is connected to a PROG pin of the charge management chip1Resistance R1The other end is grounded and used for limiting the maximum charging current.
As a preferred scheme, the single chip microcomputer is connected with the drive control circuit through a PWM output end, a first speed regulating switch and a second speed regulating switch are further connected to the single chip microcomputer, and the other ends of the first speed regulating switch and the second speed regulating switch are grounded.
As a preferred scheme, the terminal of the single chip microcomputer connected with the battery is grounded through a capacitor.
The utility model has the advantages that: the utility model arranges the charging management chip in the face cleaning tool control circuit, and utilizes the charging management chip to monitor the charging process of the battery, while charging the battery, detecting the battery voltage, and adjusting the charging current according to the battery voltage, when the voltage of the battery is far less than the rated voltage, the high-current or constant-current charging is adopted, when the voltage of the battery is close to the rated voltage, the charging current is gradually reduced until the charging current is reduced to zero when the voltage of the battery reaches the rated voltage, thus effectively reducing the heating problem during the charging of the battery, leading the voltage detection result to be accurate, avoiding the phenomenon of over-charging or insufficient charging, meanwhile, the battery voltage detected by the charging management chip can be fed back to the singlechip, when the battery voltage is too low, the single chip microcomputer enters an undervoltage protection state and refuses to output current to the drive control circuit, so that the situation of battery overdischarge is avoided.
Description of the drawings:
the following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a circuit diagram of the control circuit of the present invention.
In fig. 1: 1. the intelligent charging system comprises a single chip microcomputer, 2, a charging management chip, 3, a driving control circuit, 4, a battery, 5, a USB connecting terminal, 6, a motor, 7, a first speed regulation switch, 8, a second speed regulation switch, 9 and a capacitor.
The specific implementation mode is as follows:
the following describes in detail a specific embodiment of the present invention with reference to the drawings.
The control circuit applied to the facial cleaning tool as shown in fig. 1 is characterized by comprising a single chip microcomputer 1, a charging management chip 2 and a driving control circuit 3 which are respectively connected with the single chip microcomputer 1, wherein a VDD terminal of the single chip microcomputer 1 is connected with a positive electrode of a battery 4 of the facial cleaning tool, the battery 4 supplies working voltage to the single chip microcomputer 1, and the single chip microcomputer 1 supplies the working voltage to the single chip microcomputer 1 through a switch S1A circuit is formed by grounding or connecting the negative electrode of a battery 4, the VCC terminal of the charging management chip 2 is connected with the positive electrode of a USB connecting terminal 5, the BAT terminal is connected with the positive electrode of the battery 4 of the face cleaning tool, the drive control circuit 3 comprises an electronic switch Q1The electronic switch Q1Can be MOS tube or IGBT tube, preferably IGBT tube, electronic switch Q1The control electrode of the single chip microcomputer 1 is connected with the single chip microcomputer 1, the drain electrode of the single chip microcomputer 1 is grounded, the source electrode of the single chip microcomputer 1 is connected with the positive electrode of the battery 4 through the motor 6, and the PC2 terminal of the single chip microcomputer 1 is also connected with the positive electrode of the USB connecting terminal 5 and used for detecting charging current.
The above-mentionedThe PROG pin of the charging management chip 2 is connected with a resistor R1Resistance R1The other end is grounded and used for limiting the maximum charging current and detecting the current of the circuit so as to provide a basis for controlling the magnitude of the charging current. The single chip microcomputer 1 is connected with the drive control circuit 3 through the PWM output end, the single chip microcomputer 1 is further connected with a first speed regulation switch 7 and a second speed regulation switch 8, the other ends of the first speed regulation switch 7 and the second speed regulation switch 8 are grounded or connected with the negative electrode of the battery 4, when the first speed regulation switch 7 is switched on, the PWM output end is adjusted to be larger to output the pulse signal duty ratio, and when the second speed regulation switch is switched on, the PWM output end is adjusted to be smaller to output the pulse signal duty ratio. The single chip microcomputer 1 is connected with a terminal of the battery 4 and is grounded through a capacitor 8.
The utility model discloses the theory of operation is: as shown in fig. 1, when charging the battery 4, first connect the USB connection terminal 5 with a power adapter (also called charger, not shown in the figure), at this time, the charging management chip 2 gets power, the power adapter simultaneously makes the PC2/PWM5 terminal of the single chip 1 form a high level, the single chip 1 sends a signal indicating starting charging to the CHRG terminal of the charging management chip 2 through the PA7 terminal, after receiving the signal, the charging management chip 2 first detects the battery voltage through the BAT terminal, then presets the charging management chip 2 with the rated voltage of 4.2V as an example according to the comparison between the battery voltage and the preset rated voltage, when the battery 4 voltage is less than 3V, it charges with a large current of 1.5A, when the battery 4 voltage is between 3V and 4V, it charges with a current of 1A, when the battery 4 voltage is greater than 4V, it gradually reduces the charging current with the rise of the voltage, and when the voltage 4 of the battery reaches 4.2V, the charging current drops to zero, and the charging is stopped.
Because the low current is adopted for charging under the condition that the voltage of the battery 4 is higher, and the charging current is smaller along with the rise of the voltage, the heating phenomenon of battery charging is effectively reduced, and the phenomenon that the battery is damaged due to the overcharge of the battery is effectively avoided.
During discharge, as shown in FIG. 1, switch S1The grounding enables the PA3 terminal to form low level, the single chip microcomputer 1 controls the PC3/PWM4 terminal to output pulse signals with certain duty ratio, and the MOS transistor Q1According to the pulse signalOpening and closing, switching on the loop of the motor 6, rotating the motor 6 to form a discharging process, wherein in the discharging process, the ABT terminal of the charging management chip 2 continuously detects the voltage of the battery 4, and transmits the voltage data of the battery 4 to the singlechip 1 through the CHRG terminal, when the voltage of the battery 4 received by the singlechip 1 is lower than a preset minimum voltage value, the singlechip 1 starts an under-voltage protection function, the signal output of the PC3/PWM4 terminal is cut off, and the MOS tube Q is connected with the power supply1Off and the motor 6 stalls.
After recharging, when the battery voltage is greater than the lowest voltage value preset by the single chip microcomputer 1, the single chip microcomputer 1 returns to the normal state.
The utility model discloses an optimization to clean face instrument control circuit for 4 charges and discharges safety and stability more of battery of clean face instrument avoid the emergence of overcharge, overdischarge phenomenon, prolong battery 4's life.
The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (4)
1. Be applied to clean face instrument 'S control circuit, its characterized in that includes singlechip (1), charge management chip (2) and drive control circuit (3) of being connected with singlechip (1) respectively, singlechip (1) is connected with clean face instrument' S battery (4), and singlechip (1) passes through switch S1A negative electrode of a battery (4) is connected, the charging management chip (2) is respectively connected with the USB connecting terminal (5) and the battery (4) of the face cleaning tool, and the driving control circuit (3) comprises an electronic switch Q1(IGBT transistor), the electronic switch (MOS transistor) Q1The control electrode is connected with the single chip microcomputer (1), the drain electrode is grounded, the source electrode and the positive electrode of the battery (4) are connected with the motor (6), and the single chip microcomputer (1) is also connected with the USB connecting terminal (5).
2. The control circuit for a facial cleaning tool of claim 1, wherein said control circuit is adapted to control said facial cleaning toolA resistor R is connected to the PROG pin of the charging management chip (2)1Resistance R1The other end is grounded and used for limiting the maximum charging current.
3. The control circuit applied to the face cleaning tool is characterized in that the single chip microcomputer (1) is connected with the driving control circuit (3) through a PWM output end, a first speed regulating switch (7) and a second speed regulating switch (8) are further connected to the single chip microcomputer (1), and the other ends of the first speed regulating switch (7) and the second speed regulating switch (8) are grounded.
4. The control circuit applied to the face cleaning tool according to claim 1, wherein the terminal of the single chip microcomputer (1) connected to the battery (4) is grounded through a capacitor (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922244148.0U CN211180588U (en) | 2019-12-13 | 2019-12-13 | Control circuit applied to face cleaning tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922244148.0U CN211180588U (en) | 2019-12-13 | 2019-12-13 | Control circuit applied to face cleaning tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211180588U true CN211180588U (en) | 2020-08-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922244148.0U Active CN211180588U (en) | 2019-12-13 | 2019-12-13 | Control circuit applied to face cleaning tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211180588U (en) |
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2019
- 2019-12-13 CN CN201922244148.0U patent/CN211180588U/en active Active
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