Electric appliance standby control circuit with battery charging function and control method

Abstract

The invention belongs to the technical field of control circuits, and provides an electric appliance standby control circuit with a battery charging function and a control method, and the electric appliance standby control circuit comprises a battery, a charging and discharging management module, an MCU system and a low-power-consumption control module. The battery is connected with the charge-discharge management module; the charging and discharging management module is connected with the MCU system and the low-power-consumption control module. And the MCU system is connected with the low-power-consumption control module. The circuit has the advantages of few components, no additional occupation of I / O port resources of the MCU, no standby power consumption, long service life and the like, and for an electric appliance with a battery charging function, the service time of a battery can be remarkably prolonged, the requirement for frequent charging is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of control circuits, and in particular to an electrical appliance standby control circuit with a battery charging function and a control method. Background Art

[0002] Currently, for portable devices with batteries, low-power design can significantly extend battery life, reduce the need for frequent charging, and improve user experience. Low-power design can reduce the operating temperature of the device, reduce failures caused by overheating, and improve system stability and reliability.

[0003] The existing technology generally uses the MCU to enter a sleep state, but there is still a current consumption of 1-200uA. For devices with insufficient battery capacity, the battery will be exhausted within a certain period of time and cannot be started.

[0004] Therefore, it is necessary to provide an electrical appliance standby control circuit and control method with a battery charging function. Summary of the invention

[0005] The present invention provides an electrical appliance standby control circuit and control method with a battery charging function, which has the advantages of fewer components, no additional occupation of MCU I / O port resources, no standby power consumption, and long service life. For electrical appliances with a battery charging function, the battery life can be significantly extended, the need for frequent charging is reduced, and the user experience is improved.

[0006] The present invention provides an electrical appliance standby control circuit with a battery charging function, comprising:

[0007] Battery, charge and discharge management module, MCU system and low power consumption control module; the battery is connected to the charge and discharge management module; the charge and discharge management module is respectively connected to the MCU system and the low power consumption control module; the MCU system is connected to the low power consumption control module.

[0008] Furthermore, the battery is a series-parallel structure of 1 to 6 pieces, the battery voltage is between 3.6V and 24V, and the battery is equipped with an NTC temperature sensor.

[0009] Furthermore, the charge and discharge management module includes a battery charge management chip, which controls fast charging or normal charging of the battery, and the charging voltage corresponding to the charging supports the PD fast charging protocol or the QC fast charging protocol.

[0010] Furthermore, the MCU system includes a single chip microcomputer, a crystal oscillator or an internal crystal oscillator.

[0011] Further, the low power consumption control module includes a PMOS tube Q1, a transistor Q2, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R12, a capacitor C1, a diode D1, a diode D2, a button SW1 and a button SW2; the drain of the PMOS tube Q1 is connected to the positive electrode of the battery; the source of the PMOS tube Q1 is connected to the power supply voltage; the gate of the PMOS tube Q1 is respectively connected to the other end of the resistor R2, one end of the resistor R3 and one end of the resistor R5; one end of the resistor R2 is connected to the positive electrode of the battery; the other end of the resistor R5 is connected to the collector of the transistor Q2; the emitter of the transistor Q2 is grounded; the base of the transistor Q2 is respectively connected to one end of the resistor R9 and one end of the resistor R12; the other end of the resistor R12 is grounded;

[0012] The other end of the resistor R3 is connected to the anode of the diode D1, and the cathode of the diode D1 is respectively connected to one end of the capacitor C1 and the 1 and 2 ports of the button SW1; the anode of the diode D2 is connected to one end of the resistor R7, and the other end of the resistor R7 is respectively connected to the other end of the resistor R6 and one end of the resistor R10; one end of the resistor R6 is connected to the power supply voltage; the other end of the resistor R10 is connected to the 3 and 4 ports of the button SW2; the 3 and 4 ports of the button SW1 and the 1 and 2 ports of the button SW1 are all grounded; the other end of the resistor R6 is connected to the detection port SW2_AD.

[0013] Furthermore, the other end of the resistor R6 is connected to the detection port SW2_AD of the single chip microcomputer, and the other end of the resistor R9 is connected to the CE terminal of the single chip microcomputer.

[0014] A control method is applied to an electrical appliance standby control circuit with a battery charging function, comprising:

[0015] When the appliance is not started, the charge and discharge management module is used to control the battery to connect to the USB for charging or disconnect charging; at this time, the gate-source voltage VGS of the PMOS tube Q1 in the low-power control module is 0, which is in the cut-off state, and the power supply voltage VCC in the MCU system is 0, and the appliance does not consume power;

[0016] When the appliance enters the working state, the MCU system is operated by pressing the button SW1 in the low power control module;

[0017] When the working process of the appliance is completed, or the button SW1 in the low-power control module is controlled to be turned off, the MCU system is not working to ensure that the appliance enters a zero-power standby state;

[0018] When the appliance is restarted, the MCU system can be cycled between operation and non-operation by repeatedly pressing the key SW1 in the low power consumption control module.

[0019] Furthermore, when the appliance enters the working state, the operation of the MCU system is realized by pressing the button SW1 in the low power control module, including:

[0020] When the appliance enters the working state, press the button SW1, the gate-source voltage VGS of the PMOS tube Q1 is the same as the battery voltage, the PMOS tube Q1Q1 is turned on, the power supply voltage VCC in the MCU system is the same as the battery voltage, and the MCU system starts to work;

[0021] After the MCU system is running, it first outputs a high level through the CE terminal. At this time, the transistor Q2 is turned on, and the gate-source voltage VGS of the PMOS tube Q1 is connected to GND through the resistor R3 and the transistor Q2. The PMOS tube Q1 is always turned on. Whether the button SW1 is pressed or released, it does not affect the conduction of the PMOS tube Q1. At this time, the power supply voltage VCC is the same as the battery voltage; during the operation of the appliance, CE maintains a high level, the power supply voltage VCC in the MCU system is maintained, and the MCU system is in working condition.

[0022] Furthermore, when the working process of the appliance is completed, or the button SW1 in the low power control module is controlled to be turned off, the MCU system is not operated to ensure that the appliance enters a zero power standby state, including:

[0023] When the working process of the appliance is completed, or it is turned off due to the control of button SW1, the MCU system will output CE at a low level, and the reverse breakdown voltage VBE on the emitter and base of the transistor Q2 is 0, and it is in the cut-off state. At the same time, the gate-source voltage VGS of the PMOS tube Q1 is controlled to be 0, and it is in the cut-off state. At this time, the power supply voltage of the MCU system is 0, the MCU system does not work, and enters the zero-power standby state.

[0024] Furthermore, the method further includes processing the over-high temperature situation based on the temperature monitoring result of the battery, specifically:

[0025] An over-temperature control module connected to the charge and discharge management module and the MCU system is configured; the over-temperature control module includes a processor and a comparator;

[0026] Using the processor, collect and obtain the temperature data of the NTC temperature sensor configured on the battery;

[0027] Compare the temperature data with the set temperature threshold through a comparator to obtain a comparison result;

[0028] If the comparison result shows that the set first control condition is met, the processor controls the battery charging management chip in the charging and discharging management module to adjust the battery from fast charging to normal charging, or from normal charging to suspended charging, so as to achieve the effect of reducing the temperature;

[0029] If the comparison result shows that the set second control condition is met, the MCU system controls the pressing or popping up of the button SW2 to assist in adjusting the power consumption of the electrical appliance, thereby achieving the effect of lowering the temperature.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects: it has the advantages of fewer components, does not occupy additional I / O port resources of the MCU, has no standby power consumption, and has a long service life. For electrical appliances with battery charging function, it can significantly extend the battery life, reduce the need for frequent charging, and improve user experience.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0032] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the structure of a standby control circuit module of an electrical appliance with a battery charging function;

[0035] Figure 2 It is a schematic diagram of the structure of the low power consumption control module;

[0036] Figure 3 A schematic diagram of the steps of a control method. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0038] The present invention provides an electrical appliance standby control circuit with a battery charging function, such as Figure 1 As shown, including:

[0039] Battery, charge and discharge management module, MCU system and low power consumption control module; the battery is connected to the charge and discharge management module; the charge and discharge management module is respectively connected to the MCU system and the low power consumption control module; the MCU system is connected to the low power consumption control module.

[0040] The working principle of the above technical solution is: in order to realize an electrical standby control circuit with a battery charging function, the present invention proposes a battery, a charge and discharge management module, an MCU system and a low-power control module; the battery is connected to the charge and discharge management module; the charge and discharge management module is respectively connected to the MCU system and the low-power control module; the MCU system is connected to the low-power control module.

[0041] The beneficial effects of the above technical solution are: by adopting the solution provided in this embodiment, the electrical standby control circuit has the advantages of components, no additional occupation of the MCU's I / O port resources, no standby power consumption, and a long service life. For electrical appliances with battery charging function, it can significantly extend the battery life, reduce the need for frequent charging, and improve user experience.

[0042] In one embodiment, the battery is a series-parallel structure of 1 to 6 pieces, the battery voltage is between 3.6V and 24V, and an NTC temperature sensor is configured on the battery.

[0043] The working principle of the above technical solution is: the battery proposed by the present invention is a series-parallel structure of 1 to 6 pieces, the voltage of the battery is between 3.6V and 24V, and an NTC temperature sensor is configured on the battery.

[0044] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by configuring the battery structure and battery voltage, and configuring an NTC temperature sensor on the battery, a basis is provided for subsequent control implementation.

[0045] In one embodiment, the charge and discharge management module includes a battery charge management chip, which controls fast charging or normal charging of the battery, and the charging voltage corresponding to the charging supports the PD fast charging protocol or the QC fast charging protocol.

[0046] The working principle of the above technical solution is: in order to realize the functions of the charge and discharge management module, the present invention proposes to use a battery charging management chip to implement fast charging or normal charging of the battery, and the charging voltage corresponding to the charging supports the PD fast charging protocol or the QC fast charging protocol.

[0047] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the battery can be fast charged or normally charged through the control of the battery charging management chip of the charge and discharge management module.

[0048] In one embodiment, the MCU system includes a single chip microcomputer, a crystal oscillator or an internal crystal oscillator.

[0049] The working principle of the above technical solution is: the MCU system includes a single-chip microcomputer, a crystal oscillator or an internal crystal oscillator.

[0050] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the charge and discharge management module and the low power consumption control module can be controlled through the MCU system.

[0051] In one embodiment, Figure 2 As shown, the low power consumption control module includes a PMOS tube Q1, a transistor Q2, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R12, a capacitor C1, a diode D1, a diode D2, a button SW1 and a button SW2; the drain of the PMOS tube Q1 is connected to the positive electrode of the battery; the source of the PMOS tube Q1 is connected to the power supply voltage; the gate of the PMOS tube Q1 is respectively connected to the other end of the resistor R2, one end of the resistor R3 and one end of the resistor R5; one end of the resistor R2 is connected to the positive electrode of the battery; the other end of the resistor R5 is connected to the collector of the transistor Q2; the emitter of the transistor Q2 is grounded; the base of the transistor Q2 is respectively connected to one end of the resistor R9 and one end of the resistor R12; the other end of the resistor R12 is grounded;

[0052] The other end of the resistor R3 is connected to the anode of the diode D1, and the cathode of the diode D1 is respectively connected to one end of the capacitor C1 and the 1 and 2 ports of the button SW1; the anode of the diode D2 is connected to one end of the resistor R7, and the other end of the resistor R7 is respectively connected to the other end of the resistor R6 and one end of the resistor R10; one end of the resistor R6 is connected to the power supply voltage; the other end of the resistor R10 is connected to the 3 and 4 ports of the button SW2; the 3 and 4 ports of the button SW1 and the 1 and 2 ports of the button SW1 are all grounded; the other end of the resistor R6 is connected to the detection port SW2_AD.

[0053] The working principle of the above technical solution is as follows: the low power consumption control module proposed by the present invention comprises a PMOS tube Q1, a transistor Q2, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R12, a capacitor C1, a diode D1, a diode D2, a button SW1 and a button SW2; the drain of the PMOS tube Q1 is connected to the positive electrode of the battery; the source of the PMOS tube Q1 is connected to the power supply voltage; the gate of the PMOS tube Q1 is respectively connected to the other end of the resistor R2, one end of the resistor R3 and one end of the resistor R5; one end of the resistor R2 is connected to the positive electrode of the battery; the other end of the resistor R5 is connected to the collector of the transistor Q2; the emitter of the transistor Q2 is grounded; the base of the transistor Q2 is respectively connected to one end of the resistor R9 and one end of the resistor R12; the other end of the resistor R12 is grounded;

[0054] The other end of the resistor R3 is connected to the anode of the diode D1, and the cathode of the diode D1 is respectively connected to one end of the capacitor C1 and the 1 and 2 ports of the button SW1; the anode of the diode D2 is connected to one end of the resistor R7, and the other end of the resistor R7 is respectively connected to the other end of the resistor R6 and one end of the resistor R10; one end of the resistor R6 is connected to the power supply voltage; the other end of the resistor R10 is connected to the 3 and 4 ports of the button SW2; the 3 and 4 ports of the button SW1 and the 1 and 2 ports of the button SW1 are all grounded; the other end of the resistor R6 is connected to the detection port SW2_AD.

[0055] The beneficial effect of the above technical solution is: by adopting the solution provided by this embodiment, the function of implementing low power consumption control can be guaranteed by configuring the structure of the low power consumption control module.

[0056] In one embodiment, the other end of the resistor R6 is connected to the detection port SW2_AD of the single chip microcomputer, and the other end of the resistor R9 is connected to the CE terminal of the single chip microcomputer.

[0057] The working principle of the above technical solution is: the other end of the resistor R6 is connected to the detection port SW2_AD of the single-chip microcomputer, and the other end of the resistor R9 is connected to the CE end of the single-chip microcomputer, so that the structural connection between the modules can be realized.

[0058] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the structural connection between the modules can be achieved by configuring the connection between the other end of the resistor R6 and the other end of the resistor R9.

[0059] A control method such as Figure 3 As shown, it is applied to an electrical appliance standby control circuit with a battery charging function, comprising:

[0060] When the appliance is not started, the charge and discharge management module is used to control the battery to connect to the USB for charging or disconnect charging; at this time, the gate-source voltage VGS of the PMOS tube Q1 in the low-power control module is 0, which is in the cut-off state, and the power supply voltage VCC in the MCU system is 0, and the appliance does not consume power;

[0061] When the appliance enters the working state, the MCU system is operated by pressing the button SW1 in the low power control module;

[0062] When the working process of the appliance is completed, or the button SW1 in the low-power control module is controlled to be turned off, the MCU system is not working to ensure that the appliance enters a zero-power standby state;

[0063] When the appliance is restarted, the MCU system can be cycled between operation and non-operation by repeatedly pressing the key SW1 in the low power consumption control module.

[0064] The working principle of the above technical solution is as follows: in order to realize the control method, the present invention proposes that: when the appliance is not started, the charge and discharge management module is used to control the battery to connect to the USB for charging or disconnect the charging; at this time, the gate-source voltage VGS of the PMOS tube Q1 in the low-power control module is 0, which is in the cut-off state, the power supply voltage VCC in the MCU system is 0, and the appliance does not consume power; when the appliance enters the working state, the operation of the MCU system is realized by controlling the pressing of the button SW1 in the low-power control module; when the working process of the appliance is completed, or the button SW1 in the low-power control module is controlled to be turned off, the MCU system is not working to ensure that the appliance enters the zero-power standby state; when the appliance is started again, the operation and non-working cycle of the MCU system is realized by repeatedly pressing the button SW1 in the low-power control module.

[0065] The beneficial effect of the above technical solution is: by adopting the solution provided by this embodiment and proposing a control method, effective control of an electrical appliance with a battery charging function can be achieved.

[0066] In one embodiment, when the appliance enters the working state, the operation of the MCU system is realized by pressing the button SW1 in the low power consumption control module, including:

[0067] When the appliance enters the working state, press the button SW1, the gate-source voltage VGS of the PMOS tube Q1 is the same as the battery voltage, the PMOS tube Q1Q1 is turned on, the power supply voltage VCC in the MCU system is the same as the battery voltage, and the MCU system starts to work;

[0068] After the MCU system is running, it first outputs a high level through the CE terminal. At this time, the transistor Q2 is turned on, and the gate-source voltage VGS of the PMOS tube Q1 is connected to GND through the resistor R3 and the transistor Q2. The PMOS tube Q1 is always turned on. Whether the button SW1 is pressed or released, it does not affect the conduction of the PMOS tube Q1. At this time, the power supply voltage VCC is the same as the battery voltage; during the operation of the appliance, CE maintains a high level, the power supply voltage VCC in the MCU system is maintained, and the MCU system is in working condition.

[0069] The working principle of the above technical solution is: in order to realize the operation of the MCU system by pressing the button SW1 in the low-power control module, the present invention proposes: when the appliance enters the working state, the button SW1 is pressed, the gate-source voltage VGS of the PMOS tube Q1 is the same as the battery voltage, the PMOS tube Q1Q1 is turned on, the power supply voltage VCC in the MCU system is the same as the battery voltage, and the MCU system starts to work;

[0070] After the MCU system is running, it first outputs a high level through the CE terminal. At this time, the transistor Q2 is turned on, and the gate-source voltage VGS of the PMOS tube Q1 is connected to GND through the resistor R3 and the transistor Q2. The PMOS tube Q1 is always turned on. Whether the button SW1 is pressed or released, it does not affect the conduction of the PMOS tube Q1. At this time, the power supply voltage VCC is the same as the battery voltage; during the operation of the appliance, CE maintains a high level, the power supply voltage VCC in the MCU system is maintained, and the MCU system is in working condition.

[0071] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the working state of the MCU system is controlled by pressing the button SW1.

[0072] In one embodiment, when the working process of the appliance is completed, or the button SW1 in the low power consumption control module is controlled to be turned off, the MCU system is not operated to ensure that the appliance enters a zero power consumption standby state, including:

[0073] When the working process of the appliance is completed, or it is turned off due to the control of button SW1, the MCU system will output CE at a low level, and the reverse breakdown voltage VBE on the emitter and base of the transistor Q2 is 0, and it is in the cut-off state. At the same time, the gate-source voltage VGS of the PMOS tube Q1 is controlled to be 0, and it is in the cut-off state. At this time, the power supply voltage of the MCU system is 0, the MCU system does not work, and enters the zero-power standby state.

[0074] The working principle of the above technical solution is: in order to realize that when the working process of the appliance is completed, or when the button SW1 in the low-power control module is controlled to be turned off, the MCU system does not work to ensure that the appliance enters a zero-power standby state, the present invention proposes that when the working process of the appliance is completed, or when the button SW1 control is turned off, the MCU system outputs a low level CE, the reverse breakdown voltage VBE on the emitter and base of the transistor Q2 is 0, and it is in a cut-off state, and at the same time, the gate-source voltage VGS of the PMOS tube Q1 is controlled to be 0, and it is in a cut-off state. At this time, the power supply voltage of the MCU system is 0, the MCU system does not work, and enters a zero-power standby state.

[0075] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, when the working process of the appliance is completed, or when the button SW1 in the low-power control module is controlled to be turned off, the MCU system is controlled to stop working, thereby ensuring that the appliance enters a zero-power standby state.

[0076] In one embodiment, the process further includes processing the over-high temperature situation based on the temperature monitoring result of the battery, specifically:

[0077] An over-temperature control module connected to the charge and discharge management module and the MCU system is configured; the over-temperature control module includes a processor and a comparator;

[0078] Using the processor, collect and obtain the temperature data of the NTC temperature sensor configured on the battery;

[0079] Compare the temperature data with the set temperature threshold through a comparator to obtain a comparison result;

[0080] If the comparison result shows that the set first control condition is met, the processor controls the battery charging management chip in the charging and discharging management module to adjust the battery from fast charging to normal charging, or from normal charging to suspended charging, so as to achieve the effect of reducing the temperature;

[0081] If the comparison result shows that the set second control condition is met, the MCU system controls the pressing or popping up of the button SW2 to assist in adjusting the power consumption of the electrical appliance, thereby achieving the effect of lowering the temperature.

[0082] The working principle of the above technical solution is: in order to better ensure the efficient operation of the electrical appliance, the present invention also proposes to handle the situation of excessive temperature based on the temperature monitoring result of the battery, specifically: first configure an over-temperature control module connected to the charge and discharge management module and the MCU system respectively; the over-temperature control module includes a processor and a comparator; then use the processor to collect and obtain the temperature data of the NTC temperature sensor configured on the battery; then compare the temperature data with the set temperature threshold through the comparator to obtain a comparison result; if the comparison result shows that the set first control condition is met, then based on the processor controlling the battery charging management chip in the charge and discharge management module, the battery is adjusted from fast charging to normal charging, or from normal charging to suspended charging, so as to achieve the effect of lowering the temperature; if the comparison result shows that the set second control condition is met, then based on the MCU system, the button SW2 is pressed or popped up to assist in adjusting the power consumption of the electrical appliance, thereby achieving the effect of lowering the temperature.

[0083] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the situation of excessive temperature is processed based on the temperature monitoring result of the battery, so as to better ensure the efficient operation of the electrical appliance.

[0084] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An electrical appliance standby control circuit with a battery charging function, characterized in that: include: Battery, charge and discharge management module, MCU system and low power control module; The battery is connected to the charge and discharge management module; the charge and discharge management module is respectively connected to the MCU system and the low power consumption control module; the MCU system is connected to the low power consumption control module.

2. The electrical appliance standby control circuit with battery charging function according to claim 1, characterized in that: The battery is a series-parallel structure of 1 to 6 pieces, the battery voltage is between 3.6V and 24V, and the battery is equipped with an NTC temperature sensor.

3. The electrical appliance standby control circuit with battery charging function according to claim 1, characterized in that: The charge and discharge management module includes a battery charge management chip, which controls the fast charging or normal charging of the battery. The charging voltage corresponding to the charging supports the PD fast charging protocol or the QC fast charging protocol.

4. The electrical appliance standby control circuit with battery charging function according to claim 1, characterized in that: The MCU system includes a single-chip microcomputer, a crystal oscillator or an internal crystal oscillator.

5. The electrical appliance standby control circuit with battery charging function according to claim 1, characterized in that: The low power consumption control module includes a PMOS tube Q1, a transistor Q2, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R12, a capacitor C1, a diode D1, a diode D2, a button SW1 and a button SW2; the drain of the PMOS tube Q1 is connected to the positive electrode of the battery; the source of the PMOS tube Q1 is connected to the power supply voltage; the gate of the PMOS tube Q1 is respectively connected to the other end of the resistor R2, one end of the resistor R3 and one end of the resistor R5; one end of the resistor R2 is connected to the positive electrode of the battery; the other end of the resistor R5 is connected to the collector of the transistor Q2; the emitter of the transistor Q2 is grounded; the base of the transistor Q2 is respectively connected to one end of the resistor R9 and one end of the resistor R12; the other end of the resistor R12 is grounded; The other end of the resistor R3 is connected to the anode of the diode D1, and the cathode of the diode D1 is respectively connected to one end of the capacitor C1 and the 1 and 2 ports of the button SW1; the anode of the diode D2 is connected to one end of the resistor R7, and the other end of the resistor R7 is respectively connected to the other end of the resistor R6 and one end of the resistor R10; one end of the resistor R6 is connected to the power supply voltage; the other end of the resistor R10 is connected to the 3 and 4 ports of the button SW2; the 3 and 4 ports of the button SW1 and the 1 and 2 ports of the button SW1 are all grounded; the other end of the resistor R6 is connected to the detection port SW2_AD.

6. The electrical appliance standby control circuit with battery charging function according to claim 5, characterized in that: The other end of the resistor R6 is connected to the detection port SW2_AD of the single chip microcomputer, and the other end of the resistor R9 is connected to the CE terminal of the single chip microcomputer.

7. A control method, applied to an electrical appliance standby control circuit with a battery charging function as claimed in any one of claims 1 to 6, characterized in that: include: When the appliance is not started, the charge and discharge management module is used to control the battery to connect to the USB for charging or disconnect charging; At this time, the gate-source voltage VGS of the PMOS tube Q1 in the low-power control module is 0, which is in the cut-off state. The power supply voltage VCC in the MCU system is 0, and the electrical appliance does not consume power. When the appliance enters the working state, the MCU system is operated by pressing the button SW1 in the low power control module; When the working process of the appliance is completed, or the button SW1 in the low-power control module is controlled to be turned off, the MCU system is not working to ensure that the appliance enters a zero-power standby state; When the appliance is restarted, the MCU system can be cycled between operation and non-operation by repeatedly pressing the button SW1 in the low power consumption control module.

8. A control method according to claim 7, characterized in that: When the appliance enters the working state, the MCU system is operated by pressing the button SW1 in the low power control module, including: When the appliance enters the working state, press the button SW1, the gate-source voltage VGS of the PMOS tube Q1 is the same as the battery voltage, the PMOS tube Q1Q1 is turned on, the power supply voltage VCC in the MCU system is the same as the battery voltage, and the MCU system starts to work; After the MCU system is running, it first outputs a high level through the CE terminal. At this time, the transistor Q2 is turned on, and the gate-source voltage VGS of the PMOS tube Q1 is connected to GND through the resistor R3 and the transistor Q2. The PMOS tube Q1 is always turned on. Whether the button SW1 is pressed or released, it does not affect the conduction of the PMOS tube Q1. At this time, the power supply voltage VCC is the same as the battery voltage; during the operation of the appliance, CE maintains a high level, the power supply voltage VCC in the MCU system is maintained, and the MCU system is in working condition.

9. A control method according to claim 7, characterized in that: When the working process of the appliance is completed, or the button SW1 in the low-power control module is controlled to be turned off, the MCU system is not working to ensure that the appliance enters a zero-power standby state, including: When the working process of the appliance is completed, or it is turned off due to the control of button SW1, the MCU system will output CE at a low level, and the reverse breakdown voltage VBE on the emitter and base of the transistor Q2 is 0, and it is in the cut-off state. At the same time, the gate-source voltage VGS of the PMOS tube Q1 is controlled to be 0, and it is in the cut-off state. At this time, the power supply voltage of the MCU system is 0, the MCU system does not work, and enters the zero-power standby state.

10. A control method according to claim 7, characterized in that: It also includes processing the over-temperature situation based on the temperature monitoring results of the battery, specifically: An over-temperature control module connected to the charge and discharge management module and the MCU system is configured; the over-temperature control module includes a processor and a comparator; Using the processor, collect and obtain the temperature data of the NTC temperature sensor configured on the battery; Compare the temperature data with the set temperature threshold through a comparator to obtain a comparison result; If the comparison result shows that the set first control condition is met, the processor controls the battery charging management chip in the charging and discharging management module to adjust the battery from fast charging to normal charging, or from normal charging to suspended charging, so as to achieve the effect of reducing the temperature; If the comparison result shows that the set second control condition is met, the MCU system controls the pressing or popping up of the button SW2 to assist in adjusting the power consumption of the electrical appliance, thereby achieving the effect of lowering the temperature.

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