On-off circuit and household electrical appliance

Abstract

The utility model provides a switch-on and switch-off circuit and a household electrical appliance, and relates to the technical field of household electrical appliances, the switch-on and switch-off circuit comprises a button circuit used for outputting a starting signal; the control end of the battery output circuit is connected with the first output end of the key circuit, and the battery output circuit is used for outputting a battery output signal according to the starting signal so as to conduct a battery to supply power. According to the technical scheme, the key circuit is adopted to output the starting signal and then is connected with the control end of the battery output circuit, so that the battery output circuit outputs the battery output signal according to the starting signal so as to conduct the battery for power supply, a single-chip microcomputer is not needed in the starting process, the requirement for more power-on time sequences can be met, and the power-on efficiency is improved. And the action of the on-off key does not need to be continuously monitored, so that energy can be effectively saved.

Description

Technical Field

[0001] This application relates to the field of home appliance technologies, and particularly to a power-on / off circuit and a household appliance. Background Art

[0002] In modern electronic products, the design of the power-on / off method is crucial, which is directly related to the power consumption of the device, the battery life, and the applicability of the application scenarios. A widely adopted implementation method of power-on / off is to continuously monitor the actions of the power-on / off button through a power-on / off control chip. When the button is pressed, the corresponding power-on or power-off command will be executed. However, this design method also brings some problems that cannot be ignored, especially in portable battery-powered devices.

[0003] The power-on / off control chip is usually designed as a low-power module, which continuously detects the state of the button. When the button is pressed, the chip will recognize this action and trigger the corresponding power-on or power-off process. This design method does bring convenience in terms of user experience, because it ensures that users can control the power state of the device through the button at any time.

[0004] However, in battery-powered devices, this continuously working power-on / off control chip will consume a certain amount of battery capacity, even when the device is in the power-off state. This means that even if the user does not use the device, the battery will gradually run out due to the operation of the power-on / off control chip. This is undoubtedly a significant challenge for devices that need to standby for a long time. Especially today when battery technology has not made a breakthrough, how to reduce the power consumption of the device has become an important issue that engineers need to solve.

[0005] In addition, the requirement of the power-on / off control chip for the supply voltage is also a factor that needs to be considered. In some high-voltage scenarios, this chip may not work properly, thus restricting the application of the device in these scenarios. This is undoubtedly a limitation for devices that need to work stably in various environments. Summary of the Utility Model

[0006] The main purpose of the present utility model is to provide a power-on / off circuit, aiming to solve the technical problem that the existing power-on / off circuit has been in a working state, continuously monitoring the actions of the power-on / off button, and consuming the battery capacity.

[0007] To achieve the above purpose, the present utility model proposes a power-on / off circuit, including: a button circuit, which is used to output a start signal;

[0008] a battery output circuit, the control end of which is connected to the first output end of the button circuit, and the battery output circuit is used to output a battery output signal according to the start signal to turn on the battery for power supply.

[0009] In one embodiment, the button circuit includes:

[0010] A first switch, with the first end of the first switch grounded and the second end of the first switch connected to the input end of the battery output circuit;

[0011] A first resistor, with at least one capacitor connected between the first end of the first resistor and ground, and a first diode connected between the second end of the first resistor and the second end of the first switch;

[0012] A second resistor, with the second end of the second resistor connected to the positive electrode of the first diode.

[0013] In one embodiment, the battery output circuit includes: a battery terminal;

[0014] A second diode, with a third diode connected between the positive electrode of the second diode and the second end of the first switch, and a third resistor connected between the positive electrode of the second diode and the battery terminal;

[0015] A first switching element, with the first conduction end of the first switching element connected to the positive electrode of the second diode, the second conduction end of the first switching element grounded, and a fourth resistor connected between the control end and the second conduction end of the first switching element;

[0016] A fifth resistor, with the second end of the fifth resistor connected to the control end of the first switching element;

[0017] A second switching element, with a sixth resistor connected between the control end and the negative electrode of the second diode, the second conduction end of the second switching element grounded, at least one resistor connected between the control end and the second conduction end of the second switching element, and at least one capacitor connected between the control end and ground of the second switching element;

[0018] A fourth diode, with a fifth diode connected between the positive electrode of the fourth diode and the first conduction end of the second switching element, and a seventh resistor connected between the common node of the fourth diode and the fifth diode and the battery terminal;

[0019] A third switching element, with an eighth resistor connected between the control end and the second conduction end of the third switching element, the second conduction end of the third switching element grounded, and the first conduction end of the third switching element connected to the second end of the seventh resistor;

[0020] A fourth switching element, a ninth resistor is connected between the control terminal of the fourth switching element and the negative electrode of the fourth diode, the second conduction terminal of the fourth switching element is grounded, and a sixth diode is connected between the first conduction terminal of the fourth switching element and the first conduction terminal of the first switching element;

[0021] A fifth switching element, a tenth resistor is connected between the control terminal of the fifth switching element and the first conduction terminal of the fourth switching element, the first conduction terminal of the fifth switching element is connected to the battery terminal, and the second conduction terminal of the fifth switching element is the output terminal of the battery output circuit.

[0022] In one embodiment, it further includes:

[0023] A control circuit, the control circuit is connected to the second output terminal of the key circuit, the first output terminal of the control circuit is connected to the battery output circuit, and the control circuit is used to output a corresponding control signal according to the switch signal output by the key circuit;

[0024] A power supply circuit, the first input terminal of the power supply circuit is connected to the battery output circuit, the output terminal of the power supply circuit is connected to the power supply input terminal of the control circuit, and the power supply circuit is used for power supply;

[0025] A charging circuit, the control terminal of the charging circuit is connected to the second output terminal of the control circuit, the first output terminal of the charging circuit is connected to the battery, the second output terminal of the charging circuit is connected to the second input terminal of the power supply circuit, and the charging circuit is used to connect to an external power supply and charge the battery.

[0026] In one embodiment, the power supply circuit includes:

[0027] A switching buck circuit, the switching buck circuit is respectively connected to the charging circuit and the battery output circuit;

[0028] A linear buck circuit, the input terminal of the linear buck circuit is connected to the output terminal of the switching buck circuit, and the output terminal of the linear buck circuit is connected to the control circuit.

[0029] In one embodiment, the charging circuit includes:

[0030] A charging interface, the charging interface is used to connect to an external power supply;

[0031] A charging control circuit, the power supply input terminal of the charging control circuit is connected to the charging interface, the output terminal of the charging control circuit is respectively connected to the battery and the second input terminal of the power supply circuit, and the charging control circuit is used to perform charging or stop charging actions according to the control signal of the control circuit.

[0032] In one embodiment, the charging control circuit includes:

[0033] A power charging circuit, the power charging circuit is connected to the second input terminal of the power circuit; the power charging circuit includes:

[0034] A seventh diode, the positive electrode of the seventh diode is connected to the charging interface, and the negative electrode of the seventh diode is connected to the second input terminal of the power circuit.

[0035] In one embodiment, the charging control circuit includes:

[0036] A battery charging circuit, the battery charging circuit is used to charge the battery; the battery charging circuit includes:

[0037] A sixth switching element, an eleventh resistor is connected between the control terminal of the sixth switching element and the second output terminal of the control circuit, the second conduction terminal of the sixth switching element is grounded, a twelfth resistor is connected between the control terminal and the second conduction terminal of the sixth switching element, at least one or more capacitors are connected between the control terminal of the sixth switching element and the ground, and a thirteenth resistor is connected between the first conduction terminal of the sixth switching element and the charging interface;

[0038] A seventh switching element, a fourteenth resistor is connected between the control terminal of the seventh switching element and the first conduction terminal of the sixth switching element, a fifteenth resistor is connected between the control terminal and the first conduction terminal of the seventh switching element, and the second conduction terminal of the seventh switching element is connected to the battery.

[0039] In one embodiment, the control circuit includes:

[0040] A control chip, the first input terminal of the control chip is connected to the key circuit, the power input terminal of the control chip is connected to the power output terminal of the power circuit, the first output terminal of the control chip is connected to the battery output circuit, and the second output terminal of the control chip is connected to the control terminal of the charging circuit.

[0041] In addition, to achieve the above object, the present invention also provides a household appliance, and the household appliance includes the power-on and power-off circuit as described above.

[0042] In the embodiment of the present invention, a start signal is output through the key circuit and then connected to the control terminal of the battery output circuit, so that the battery output circuit outputs a battery output signal according to the start signal to turn on the battery for power supply. The power-on process does not require the participation of a single-chip microcomputer, can adapt to the requirements of more power-on timings, does not need to continuously monitor the actions of the power-on and power-off keys, and can effectively save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0044] Figure 1 It is a schematic structural diagram of an embodiment of the power-on and power-off circuit of the present invention.

[0045] Figure 2 For Figure 1 the schematic diagram of the key circuit in

[0046] Figure 3 For Figure 1 the schematic diagram of the battery output circuit in

[0047] Figure 4 It is a schematic structural diagram of another embodiment of the power-on and power-off circuit of the present invention.

[0048] Figure 5 It is a schematic structural diagram of still another embodiment of the power-on and power-off circuit of the present invention.

[0049] Figure 6 It is a schematic structural diagram of another embodiment of the power-on and power-off circuit of the present invention.

[0050] Figure 7 It is a schematic structural diagram of yet another embodiment of the power-on and power-off circuit of the present invention.

[0051] Figure 8 For Figure 7 the schematic diagram of the power charging circuit in

[0052] Figure 9 It is a schematic structural diagram of another embodiment of the power-on and power-off circuit of the present invention.

[0053] Figure 10 For Figure 9 the schematic diagram of the battery charging circuit in

[0054] Figure 11 It is a schematic structural diagram of still another embodiment of the power-on and power-off circuit of the present invention.

[0055] Explanation of reference numerals:

[0056] 100, Button Circuit; 200, Battery Output Circuit; 300, Battery; 400, Control Circuit; 410, Control Chip; 500, Power Supply Circuit; 510, Switching Buck Circuit; 520, Linear Buck Circuit; 600, Charging Circuit; 610, Charging Interface; 620, Charging Control Circuit; 621, Power Charging Circuit; 622, Battery Charging Circuit;

[0057] The realization, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific Embodiments

[0058] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0059] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0060] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0061] In an embodiment of the present utility model, as Figure 1 shown, a power-on and power-off circuit includes a button circuit 100 and a battery output circuit 200, wherein:

[0062] The button circuit 100 is used to output a start signal; the control end of the battery output circuit 200 is connected to the first output end of the button circuit 100, and the battery output circuit 200 is used to conduct the battery for power supply according to the start signal.

[0063] In this embodiment, when the user presses the button in the button circuit 100, the button circuit 100 outputs a start signal. This start signal is transmitted to the control terminal of the battery output circuit 200. The battery output circuit 200 outputs a battery output signal according to the received start signal, causing the switching element that controls the output of the battery 300 to conduct, so as to control the battery 300 to conduct, thereby enabling the battery 300 to supply power and start the device. It can be understood that the button circuit 100 can be a physical button, a touch sensor, a voice recognizer, or other types of input devices, as long as it can generate and output a start signal. At the same time, the battery output circuit 200 is mainly used to control the output or stop the output of the battery 300. The specific implementation method of the battery output circuit 200 will also vary depending on the device type and application scenario. However, in any case, it needs to be able to receive the start signal and control the output of the battery 300 according to this signal. A specific implementation method of the button circuit 100 can be as Figure 2 shown. When the button is pressed, it will pull down the voltage of the network KEY. The KEY network is the input signal of the output control module of the battery 300 pack.

[0064] In this embodiment, the button circuit 100 and the battery output circuit 200 do not use integrated chips and can be built only with triodes and diodes. This circuit has a wide applicable voltage range and can adapt to the working scenarios of multiple batteries 300 connected in series by selecting diodes and triodes with different breakdown voltage ratings. The startup process does not require the participation of a single-chip microcomputer, thereby reducing the requirements for the single-chip microcomputer and adapting to the requirements of more power-on timings. The shutdown process can still be controlled by the single-chip microcomputer, so as to turn off the output of the battery 300 pack after performing the corresponding shutdown process. In addition, connecting a charger can also implement the startup function, avoiding the inability to start due to over-discharge of the battery 300.

[0065] It should be noted that although the on-off circuit in this embodiment describes a solution built with triodes and diodes, it does not mean that this is the only implementation method. In actual applications, other suitable circuit components and circuit topologies can also be selected according to specific requirements and application scenarios to implement the on-off function.

[0066] The technical solution of the present utility model outputs a start signal through the button circuit 100 and then connects it to the control terminal of the battery output circuit 200, so that the battery output circuit 200 outputs a battery output signal according to the start signal, causing the switching element that controls the output of the battery 300 to conduct, so as to control the battery 300 to conduct, thereby enabling the battery 300 to supply power and start the device. The startup process does not require the participation of a single-chip microcomputer, can adapt to the requirements of more power-on timings, does not need to continuously monitor the actions of the on-off button, and can effectively save energy.

[0067] With reference to Figure 2As shown, further, another embodiment of the present utility model provides a power-on / off circuit, based on the above Figure 1 shown embodiment, the key circuit 100 includes a first switch SW1, a first resistor R23, and a second resistor R13, where:

[0068] The first end of the first switch SW1 is grounded, and the second end of the first switch SW1 is connected to the input end of the battery output circuit 200; at least one or more capacitors are connected between the first end of the first resistor R23 and the ground, and a first diode D6 is connected between the second end of the first resistor R23 and the second end of the first switch SW1; the second end of the second resistor R13 is connected to the positive electrode of the first diode D6.

[0069] In this embodiment, when the user presses the first switch SW1, current flows from the battery 300 to the battery output circuit 200 through the first switch SW1, so that the battery output circuit 200 receives a start signal, outputs a battery output signal, turns on the switching element that controls the output of the battery 300, to control the battery 300 to conduct, so that the battery 300 supplies power to start the device. Among them, the first switch SW1 can be a touch switch or a button switch. In addition, the first resistor R23 and the second resistor R13 are used to limit the magnitude of the current and protect the stable operation of the circuit. The capacitor is used for filtering to reduce noise and interference in the circuit. The first diode D6 is used to prevent current backflow and protect the safety of the circuit. This circuit structure is simple, easy to implement, and low in cost, and is applicable to various devices that require power-on / off control.

[0070] With reference to Figure 3 shown, further, another embodiment of the present utility model provides a power-on / off circuit, based on the above Figure 2 shown embodiment, the battery output circuit 200 includes a battery terminal, a second diode D2, a first switching element Q5, a fifth resistor R5, a second switching element Q1, a fourth diode D3, a third switching element Q3, a fourth switching element Q2, and a fifth switching element Q48, where:

[0071] A third diode D5 is connected between the positive electrode of the second diode D2 and the second terminal of the first switch SW1, and a third resistor R2 is connected between the positive electrode of the second diode D2 and the battery terminal; the first conduction terminal of the first switching element Q5 is connected to the positive electrode of the second diode D2, the second conduction terminal of the first switching element Q5 is grounded, and a fourth resistor R20 is connected between the control terminal and the second conduction terminal of the first switching element Q5; the second terminal of the fifth resistor R5 is connected to the control terminal of the first switching element Q5; a sixth resistor R7 is connected between the control terminal of the second switching element Q1 and the negative electrode of the second diode D2, the second conduction terminal of the second switching element Q1 is grounded, at least one resistor is connected between the control terminal and the second conduction terminal of the second switching element Q1, and at least one capacitor is connected between the control terminal of the second switching element Q1 and the ground; a fifth diode D1 is connected between the positive electrode of the fourth diode D3 and the first conduction terminal of the second switching element Q1, and a seventh resistor R4 is connected between the common node of the fourth diode D3 and the fifth diode D1 and the battery terminal; an eighth resistor is connected between the control terminal and the second conduction terminal of the third switching element Q3, the second conduction terminal of the third switching element Q3 is grounded, and the first conduction terminal of the third switching element Q3 is connected to the second terminal of the seventh resistor R4; a ninth resistor R8 is connected between the control terminal of the fourth switching element Q2 and the negative electrode of the fourth diode D3, the second conduction terminal of the fourth switching element Q2 is grounded, and a sixth diode D4 is connected between the first conduction terminal of the fourth switching element Q2 and the first conduction terminal of the first switching element Q5; a tenth resistor R6 is connected between the control terminal of the fifth switching element Q48 and the first conduction terminal of the fourth switching element Q2, the first conduction terminal of the fifth switching element Q48 is connected to the battery terminal, and the second conduction terminal of the fifth switching element Q48 is the output terminal of the battery output circuit 200.

[0072] In this embodiment, the battery output circuit 200 includes multiple switching elements and components such as resistors, capacitors, and diodes, and is used to control the output of the battery 300. Among them, the second diode D2 is used to prevent current backflow and protect the safety of the circuit. The first switching element Q5, the second switching element Q1, the third switching element Q3, the fourth switching element Q2, and the fifth switching element Q48 are all controllable switching elements, such as triodes or field effect transistors, etc., and are used to control the on / off of the circuit 400. The battery terminal is the port connected to the battery, and its network is 9 VBAT. Resistors and capacitors are used to limit the current magnitude and filter, ensuring the stable operation of the circuit. In addition, the fifth diode D1 and the sixth diode D4 are used to prevent voltage backflow and protect the safety of the circuit. Although this circuit structure is relatively complex, it can better achieve precise control of the output of the battery 300 and meet the requirements of more devices and application scenarios.

[0073] In practical applications, the user can start the device by pressing the switch in the key circuit 100. At this time, the battery output circuit 200 will receive the start signal and start to work, output the battery output signal, and turn on the switching element that controls the output of the battery 300 to control the conduction of the battery 300, so that the battery 300 supplies power to start the device. At the same time, the battery output circuit 200 can also precisely control the output of the battery 300 according to the working state and requirements of the device to ensure the normal operation of the device.

[0074] Specifically, when the device is in the shutdown state and the battery 300 is connected, the second switching element Q1 will turn on earlier than the fourth switching element Q2, so that the fourth switching element Q2 is in the off state. At this time, the fifth switching element Q48 is in the off state, and the device is in the shutdown state. When the key circuit 100 outputs a start signal and the KEY network is pulled low by the key, the second switching element Q1 turns off and no longer controls the fourth switching element Q2 to turn off. The current flows through the pull-up resistor and the fourth diode D3 into the control terminal of the fourth switching element Q2, and the fourth switching element Q2 turns on. The conduction of the fourth switching element Q2 will continuously pull down the voltage of the KEY network, thereby maintaining the off state of the second switching element Q1.

[0075] It should be noted that although the battery output circuit 200 in this embodiment describes a solution built using multiple switching elements and components such as resistors, capacitors, and diodes, it does not mean that this is the only implementation method. In practical applications, other suitable circuit elements and circuit topologies can also be selected according to specific requirements and application scenarios to achieve precise control of the output of the battery 300.

[0076] With reference to Figure 4 shown, further, another embodiment of the present invention provides a power-on / off circuit, based on the above Figure 1In the illustrated embodiment, the power-on / off circuit further includes a control circuit 400, a power supply circuit 500, and a charging circuit 600, where:

[0077] The control circuit 400 is connected to the second output terminal of the key circuit 100. The first output terminal of the control circuit 400 is connected to the battery output circuit 200. The control circuit 400 is configured to output corresponding control signals according to the on / off signals output by the key circuit 100. The first input terminal of the power supply circuit 500 is connected to the battery output circuit 200. The output terminal of the power supply circuit 500 is connected to the power input terminal of the control circuit 400. The power supply circuit 500 is used for power supply. The control terminal of the charging circuit 600 is connected to the second output terminal of the control circuit 400. The first output terminal of the charging circuit 600 is connected to the battery 300. The second output terminal of the charging circuit 600 is connected to the second input terminal of the power supply circuit 500. The charging circuit 600 is used for connecting to an external power supply and charging the battery 300.

[0078] In this embodiment, in addition to the above-mentioned battery output circuit 200, a control circuit 400, a power supply circuit 500, and a charging circuit 600 are further introduced, making the functions of the entire power-on / off circuit more abundant and complete. The control circuit 400, as the core of the entire circuit, is responsible for receiving the on / off signals output by the key circuit 100 and outputting corresponding control signals according to these signals to control the working state of the battery output circuit 200. The power supply circuit 500 provides a stable power supply for the control circuit 400 to ensure the normal operation of the circuit. The charging circuit 600 is responsible for charging the battery 300 when an external power supply is connected to ensure the continuous use of the device.

[0079] In specific implementation, the control circuit 400 can adopt a microcontroller or other programmable logic devices to achieve precise control of the battery output circuit 200 through programming. The power supply circuit 500 can adopt circuit topologies such as linear voltage regulators or switching power supplies to provide a stable and reliable power supply. The charging circuit 600 can adopt common charging management modules, such as the charging management IC for lithium-ion batteries 300, or build a corresponding switching circuit through switching elements to achieve safe and fast charging of the battery 300.

[0080] In addition, it should be noted that although the power-on / off circuit in this embodiment includes a control circuit 400, a power supply circuit 500, and a charging circuit 600, this does not mean that this is the only implementation method. In actual applications, other suitable circuit components and circuit topologies can also be selected according to specific requirements and application scenarios to achieve the functions of the power-on / off circuit.

[0081] With reference to Figure 5As shown, further, another embodiment of the present utility model provides a power-on and power-off circuit. Based on the above Figure 4 shown embodiment, the power supply circuit 500 includes a switching buck circuit 510 and a linear buck circuit 520, wherein:

[0082] The switching buck circuit 510 is respectively connected to the charging circuit 600 and the battery output circuit 200; the input end of the linear buck circuit 520 is connected to the output end of the switching buck circuit 510, and the output end of the linear buck circuit 520 is connected to the control circuit 400.

[0083] In this embodiment, the power supply circuit 500 is further subdivided into two parts: a switching buck circuit 510 and a linear buck circuit 520. The switching buck circuit 510 is mainly responsible for processing the high voltage from the charging circuit 600 and the battery output circuit 200 and reducing it to a voltage range suitable for the operation of the control circuit 400. The linear buck circuit 520 further fine-tunes the voltage output by the switching buck circuit 510 to meet the precise requirements of the power supply voltage for the control circuit 400.

[0084] The design of the switching buck circuit 510 usually includes components such as a switching transistor, an inductor, and a capacitor. By the rapid on-off of the switching transistor, the inductor accumulates and releases magnetic field energy, thereby achieving voltage reduction of the input voltage. This circuit topology has advantages such as high efficiency, small size, and light weight, and is widely used in modern electronic devices.

[0085] The linear buck circuit 520 is relatively simple and mainly consists of components such as a linear voltage regulator and a capacitor. The linear voltage regulator adjusts the size of its internal resistance to keep the output voltage stable. Although the efficiency of the linear buck circuit 520 is relatively low, its output voltage is stable and the ripple is small, which is very suitable for providing power for sensitive circuits such as the control circuit 400.

[0086] With reference to Figure 6 As shown, further, another embodiment of the present utility model provides a power-on and power-off circuit. Based on the above Figure 4 shown embodiment, the charging circuit 600 includes a charging interface 610 and a charging control circuit 620, wherein:

[0087] The charging interface 610 is used to connect to an external power source; the power input end of the charging control circuit 620 is connected to the charging interface 610, the output end of the charging control circuit 620 is respectively connected to the battery 300 and the second input end of the power supply circuit 500, and the charging control circuit 620 is used to perform charging or stop charging actions according to the control signal of the control circuit 400.

[0088] In this embodiment, the charging circuit 600 is further refined and includes two parts: a charging interface 610 and a charging control circuit 620. The charging interface 610 is responsible for receiving an external power source and providing the power source for charging the device. The charging control circuit 620 is responsible for performing corresponding charging or stopping charging actions according to the control signal of the control circuit 400 to ensure the safe and effective charging of the battery 300.

[0089] Specifically, when the device needs to be charged, the control circuit 400 outputs a corresponding control signal to the charging control circuit 620. After receiving this signal, the charging control circuit 620 starts the charging process, connects to the external power source through the charging interface 610, and charges the battery 300. During the charging process, the charging control circuit 620 also monitors the charging status of the battery 300 in real time, such as parameters like voltage, current, and temperature, to ensure the safety and efficiency of the charging process. Once the battery 300 is fully charged or an abnormal situation occurs during the charging process, the charging control circuit 620 immediately stops charging and outputs a corresponding signal to the control circuit 400 to notify the device to stop charging.

[0090] In addition, the output terminal of the charging control circuit 620 is also connected to the second input terminal of the power supply circuit 500 to provide power support during the charging process for the power supply circuit 500. In this way, when the device is charging, the power supply circuit 500 can obtain power from the charging control circuit 620 to provide a stable power supply for sensitive circuits such as the control circuit 400 to ensure the normal operation of the device. In addition, in practical applications, other suitable circuit components and circuit topologies can also be selected according to specific requirements and application scenarios to implement the function of the charging circuit 600. For example, wireless charging technology can be adopted to charge the device through a wireless charger to further improve the convenience and flexibility of charging.

[0091] With reference to Figure 7 and Figure 8 shown, further, another embodiment of the present utility model provides a power-on and power-off circuit. Based on the above Figure 6 shown embodiment, the charging control circuit 620 includes a power charging circuit 621, where:

[0092] The power charging circuit 621 is connected to the second input terminal of the power supply circuit 500.

[0093] In this embodiment, the power charging circuit 621, as a part of the charging control circuit 620, is connected to the second input terminal of the power supply circuit 500 and is responsible for providing power support to the power supply circuit 500 during the charging process. When the device is connected to an external power supply and starts charging, the power charging circuit 621 will start to work. It receives power from the charging interface 610, converts it into a voltage and current suitable for the operation of the power supply circuit 500, and provides stable power support to the power supply circuit 500. In this way, even during the charging process, the power supply circuit 500 can obtain sufficient power from the power charging circuit 621 to ensure the normal operation of sensitive circuits such as the control circuit 400.

[0094] In addition, the design of the power charging circuit 621 also needs to consider efficiency and safety. To improve efficiency, high-efficiency conversion circuits and components can be used to reduce energy loss. At the same time, overcurrent, overvoltage, over-temperature and other protection mechanisms need to be added to ensure the safety and stability of the charging process.

[0095] The power charging circuit 621 includes a seventh diode D11, where:

[0096] The positive electrode of the seventh diode D11 is connected to the charging interface 610, and the negative electrode of the seventh diode D11 is connected to the second input terminal of the power supply circuit 500.

[0097] In this embodiment, the positive electrode of the seventh diode D11 is directly connected to the charging interface 610 and is responsible for receiving power from the external power supply. The negative electrode of the seventh diode D11 is connected to the second input terminal of the power supply circuit 500 to transmit the received power to the power supply circuit 500. The seventh diode D11 plays a role of unidirectional conduction here, ensuring that the power can only flow from the charging interface 610 to the power supply circuit 500 and preventing the reverse flow of current from damaging the device. In addition, the seventh diode D11 also has the characteristics of fast response and stability, and can effectively handle the current fluctuations and voltage changes that may occur during the charging process, ensuring the safe and stable operation of the device. At the same time, the compatibility of the device is also considered in this embodiment. Since different external power supplies may have different voltage and current characteristics, the design of the seventh diode D11 needs to be able to adapt to these changes to ensure that the device can work properly in different environments. Therefore, when selecting the seventh diode D11, parameters such as its forward voltage drop, reverse breakdown voltage, and maximum current need to be comprehensively considered to ensure that it meets the requirements of the device.

[0098] With reference to Figure 9 and Figure 10 shown, further, another embodiment of the present invention provides a power-on and power-off circuit. Based on the above Figure 6 shown embodiment, the charging control circuit 620 includes a battery charging circuit 622, where:

[0099] The battery charging circuit 622 is used to charge the battery 300.

[0100] In this embodiment, the battery charging circuit 622, as the core part of the charging control circuit 620, is responsible for charging the battery 300. It realizes the charging management of the battery 300 by connecting to the interface of the battery 300, ensuring the safe, fast and effective charging of the battery 300. The battery charging circuit 622 needs to consider the cooperation with the power supply circuit 500 and the control circuit 400. By connecting to the power supply circuit 500, the battery charging circuit 622 can obtain stable power support to ensure the smooth progress of the charging process. At the same time, by communicating with the control circuit 400, the battery charging circuit 622 can receive control signals to achieve accurate and reliable control.

[0101] The battery charging circuit 622 includes a sixth switching element Q50 and a seventh switching element Q49, where:

[0102] An eleventh resistor R27 is connected between the control terminal of the sixth switching element Q50 and the second output terminal of the control circuit 400. The second conduction terminal of the sixth switching element Q50 is grounded. A twelfth resistor R28 is connected between the control terminal and the second conduction terminal of the sixth switching element Q50. At least one or more capacitors are connected between the control terminal of the sixth switching element Q50 and the ground. A thirteenth resistor R24 is connected between the first conduction terminal of the sixth switching element Q50 and the charging interface 610. A fourteenth resistor R26 is connected between the control terminal of the seventh switching element Q49 and the first conduction terminal of the sixth switching element Q50. A fifteenth resistor R25 is connected between the control terminal and the first conduction terminal of the seventh switching element Q49. The second conduction terminal of the seventh switching element Q49 is connected to the battery 300.

[0103] In this embodiment, the sixth switching element Q50 and the seventh switching element Q49 together constitute the core part of the battery charging circuit 622. The control terminal of the sixth switching element Q50 is connected to the second output terminal of the control circuit 400 through the eleventh resistor R27, enabling the control circuit 400 to control the conduction and cutoff of the sixth switching element Q50 by outputting control signals. The second conduction terminal of the sixth switching element Q50 is grounded, and the first conduction terminal is connected to the charging interface 610 through the thirteenth resistor R24, allowing current to flow smoothly from the charging interface 610 into the sixth switching element Q50 during the charging process. At the same time, the presence of the twelfth resistor R28 and the capacitor can filter and stabilize the control signal to ensure the accurate control of the sixth switching element Q50.

[0104] The control terminal of the seventh switching element Q49 is connected to the first conduction terminal of the sixth switching element Q50 through the fourteenth resistor R26, and the first conduction terminal is connected to the battery 300 through the fifteenth resistor R25. In this connection manner, when the sixth switching element Q50 is turned on, current can flow into the battery 300 through the seventh switching element Q49 to realize the charging of the battery 300. At the same time, the resistor between the control terminal and the first conduction terminal of the seventh switching element Q49 can limit the current flowing through the seventh switching element Q49 to protect the battery 300 from damage caused by excessive current.

[0105] With reference to Figure 11 shown, further, another embodiment of the present invention provides a power-on and power-off circuit. Based on the above Figure 4 shown embodiment, the control circuit 400 includes a control chip 410, wherein:

[0106] The first input terminal of the control chip 410 is connected to the key circuit 100, the power input terminal of the control chip 410 is connected to the power output terminal of the power supply circuit 500, the first output terminal of the control chip 410 is connected to the battery output circuit 200, and the second output terminal of the control chip 410 is connected to the control terminal of the charging circuit 600.

[0107] In this embodiment, the first input terminal of the control chip 410 is connected to the key circuit 100 and is responsible for receiving the operation instructions input by the user through the keys. In this way, the user can control functions such as turning off the device, charging, and discharging through simple key operations. At the same time, the control chip 410 is also connected to the power output terminal of the power supply circuit 500 through its power input terminal to obtain stable power support to ensure its normal operation.

[0108] The first output terminal of the control chip 410 is connected to the battery output circuit 200, which is mainly responsible for controlling the process of turning off the battery output. When the power-on / off circuit is about to shut down, the control chip 410 will send a control signal to the battery output circuit 200 to turn it off. In addition, the second output terminal of the control chip 410 is connected to the control terminal of the charging circuit 600, which is responsible for controlling the charging process. When the device needs to be charged, the control chip 410 will send a control signal to the charging circuit 600 to make it start working, receive power from the charging interface 610, and charge the battery 300. At the same time, the control chip 410 will also adjust the charging current and voltage in real time according to the charging state of the battery 300 to ensure the safe, fast, and effective charging of the battery 300. The design of the control chip 410 also needs to consider low power consumption and stability. To reduce the power consumption of the device, the control chip 410 should adopt a low-power design to reduce unnecessary energy consumption. At the same time, the control chip 410 should also have stable performance and be able to ensure the normal operation and charging effect of the device in various environments and usage scenarios. In a feasible way, the control chip 410 can be implemented by a 51-type or 32-type single-chip microcomputer, such as the STM32 single-chip microcomputer, or by a controller such as an FPGA.

[0109] The present utility model also proposes a household appliance, which includes a power-on / off circuit. The specific structure of the power-on / off circuit refers to the above-mentioned embodiment. Since this household appliance adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0110] As described above is an implementation manner provided in combination with specific content, and it is not considered that the specific implementation of this application is only limited to these descriptions. Any approximation, similarity, or several technical deductions or replacements made under the premise of the concept of this application should be regarded as the protection scope of this application.

Claims

1. A power on / off circuit, characterized in that: include: A key circuit, the key circuit is used to output a start signal; a battery output circuit, the control end of the battery output circuit is connected to the first output end of the key circuit, and the battery output circuit is used to output a battery output signal according to the start signal to turn on the battery for power supply; The battery output circuit comprises: Battery terminal; a second diode, a third diode connected between an anode of the second diode and the second end of the first switch, and a third resistor connected between an anode of the second diode and the battery end; a first switch element, wherein a first conduction end of the first switch element is connected to the anode of the second diode, a second conduction end of the first switch element is grounded, and a fourth resistor is connected between the control end and the second conduction end of the first switch element; a fifth resistor, a second end of the fifth resistor being connected to the control end of the first switch element; a second switch element, a sixth resistor is connected between the control end of the second switch element and the cathode of the second diode, the second conduction end of the second switch element is grounded, at least one resistor is connected between the control end and the second conduction end of the second switch element, and at least one capacitor is connected between the control end of the second switch element and the ground; a fourth diode, a fifth diode connected between an anode of the fourth diode and the first conduction end of the second switch element, and a seventh resistor connected between a common node of the fourth diode and the fifth diode and the battery terminal; a third switch element, wherein an eighth resistor is connected between the control end and the second conduction end of the third switch element, the second conduction end of the third switch element is grounded, and the first conduction end of the third switch element is connected to the second end of the seventh resistor; a fourth switch element, wherein a ninth resistor is connected between a control end of the fourth switch element and a cathode of the fourth diode, a second conduction end of the fourth switch element is grounded, and a sixth diode is connected between a first conduction end of the fourth switch element and a first conduction end of the first switch element; A fifth switch element, wherein a tenth resistor is connected between the control end of the fifth switch element and the first conduction end of the fourth switch element, the first conduction end of the fifth switch element is connected to the battery end, and the second conduction end of the fifth switch element is the output end of the battery output circuit.

2. The switch circuit according to claim 1, characterized in that: The key circuit comprises: a first switch, a first end of the first switch is grounded, and a second end of the first switch is connected to an input end of the battery output circuit; a first resistor, wherein at least one capacitor is connected between a first end of the first resistor and ground, and a first diode is connected between a second end of the first resistor and a second end of the first switch; A second resistor, wherein a second end of the second resistor is connected to the anode of the first diode.

3. The switch circuit according to claim 1, characterized in that: Also includes: A control circuit is connected to the second output terminal of the key circuit, and the control circuit The first output end of the circuit is connected to the battery output circuit, and the control circuit is used to The switch signal output by the circuit outputs the corresponding control signal; A power supply circuit, wherein a first input terminal of the power supply circuit is connected to the battery output circuit, an output terminal of the power supply circuit is connected to a power supply input terminal of the control circuit, and the power supply circuit is used for supplying power; A charging circuit, wherein the control end of the charging circuit is connected to the second output end of the control circuit, the first output end of the charging circuit is connected to the battery, the second output end of the charging circuit is connected to the second input end of the power circuit, and the charging circuit is used to access an external power supply and charge the battery.

4. The switch circuit according to claim 3, characterized in that: The power supply circuit comprises: a switching buck circuit, wherein the switching buck circuit is connected to the charging circuit and the battery output circuit respectively; A linear buck circuit, wherein the input end of the linear buck circuit and the output end of the switch buck circuit The output end of the linear step-down circuit is connected to the control circuit.

5. The switch circuit according to claim 3, characterized in that: The charging circuit includes: a charging interface, the charging interface is used to connect to an external power source; A charging control circuit, wherein the power input end of the charging control circuit is connected to the charging interface, the output end of the charging control circuit is respectively connected to the battery and the second input end of the power circuit, and the charging control circuit is used to execute charging or stop charging according to a control signal of the control circuit.

6. The switch circuit according to claim 5, characterized in that: The charging control circuit package include: a power charging circuit, the power charging circuit being connected to the second input terminal of the power circuit; The power charging circuit comprises: A seventh diode, wherein an anode of the seventh diode is connected to the charging interface, and a cathode of the seventh diode is connected to the second input end of the power supply circuit.

7. The switch circuit according to claim 5, characterized in that: The charging control circuit package include: A battery charging circuit, the battery charging circuit is used to charge the battery; The battery charging circuit comprises: a sixth switch element, an eleventh resistor is connected between the control end of the sixth switch element and the second output end of the control circuit, the second conduction end of the sixth switch element is grounded, a twelfth resistor is connected between the control end and the second conduction end of the sixth switch element, at least one capacitor is connected between the control end of the sixth switch element and the ground, and a thirteenth resistor is connected between the first conduction end of the sixth switch element and the charging interface; A seventh switch element, a fourteenth resistor is connected between the control end of the seventh switch element and the first conduction end of the sixth switch element, a fifteenth resistor is connected between the control end and the first conduction end of the seventh switch element, and the second conduction end of the seventh switch element is connected to the battery.

8. The switch circuit according to claim 3, characterized in that: The control circuit comprises: A control chip, wherein a first input terminal of the control chip is connected to the key circuit, a power input terminal of the control chip is connected to a power output terminal of the power circuit, a first output terminal of the control chip is connected to the battery output circuit, and a second output terminal of the control chip is connected to a control terminal of the charging circuit.

9. A household appliance, characterized in that: The household appliance comprises a switch circuit as described in any one of claims 1-8.

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