Power supply device and atomizer

Abstract

The utility model discloses a power supply device and an atomizer, and belongs to the technical field of electronic equipment power supply. The power supply device comprises a plurality of power supply modules, a plurality of voltage division circuits corresponding to the power supply modules in number, and a comparison circuit connected with the voltage division circuits. Each power supply module is electrically connected with the to-be-powered module through a switching circuit and is used for supplying power to the to-be-powered module. Each voltage division circuit is connected with the corresponding power supply module, and is used for carrying out voltage division sampling on the corresponding power supply module to obtain a power supply voltage. The comparison circuit is electrically connected with the voltage division circuits and is used for receiving the power supply voltages through the comparison circuit so as to compare the power supply voltages and output an enable signal for switching one of the power supply modules into the power supply module according to a comparison result. And each switching circuit is connected to the output end of the comparison circuit and is used for enabling the corresponding switching circuit of the power supply module to perform circuit closing according to the enable signal so as to supply power to the module to be powered.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply for electronic equipment, in particular to a power supply device and an atomizer. Background Art

[0002] Due to the advantages of nebulization therapy such as convenience, painlessness and high efficiency, nebulization therapy has quickly become popular, and many patients have begun to use nebulization to treat respiratory diseases.

[0003] Currently, mesh nebulizers are gradually gaining market share due to their portability and low noise levels. These mesh nebulizers may need to be used without mains electricity, which places certain demands on their internal power supply endurance. To extend treatment time and prevent delays in treatment effectiveness, increasing the battery capacity and reducing power consumption of mesh nebulizers are key approaches. Increasing battery capacity can be achieved by increasing the number of batteries, but this increase in the number of batteries can pose risks to the use of the nebulizer and reduce its service life, leading to a poor user experience. Furthermore, increasing the number of batteries in series increases the operating voltage of the host, thereby increasing the host's operating and standby power consumption. Utility Model Content

[0004] The embodiments of the present application provide a power supply device and an atomizer to solve the technical problem that the current atomizer power supply has poor battery life and is difficult to safely improve the battery life.

[0005] The present application provides a power supply device, comprising: a plurality of power modules, a plurality of voltage divider circuits corresponding to the number of the power modules, and a comparison circuit connected to each of the voltage divider circuits;

[0006] Each of the power supply modules is electrically connected to the modules to be powered via a switch circuit, and is used to supply power to the modules to be powered respectively;

[0007] Each of the voltage dividing circuits is connected to the corresponding power supply module, and is used to perform voltage division sampling on the corresponding power supply module to obtain a supplyable voltage;

[0008] The comparison circuit is electrically connected to each of the voltage divider circuits, and is used to receive each of the supplyable voltages through an input terminal of the comparison circuit, compare each of the supplyable voltages, and output an enable signal for switching one of the power modules to become the power supply module according to the comparison result;

[0009] Each of the switching circuits is connected to the output end of the comparison circuit by selecting the closing end, and is used to close the circuit of the switching circuit with a one-to-one mapping electrical connection relationship between the power supply modules according to the enable signal, so as to power the module to be powered connected to the output end of the switching circuit.

[0010] In one implementation of the present application, the power supply device further includes a DC-DC boost circuit;

[0011] The first end of the DC-DC boost circuit is electrically connected to one of the multiple power modules, and the second end is electrically connected to the comparison circuit, for boosting the voltage of the connected power module and supplying power to the comparison circuit so that the comparison circuit outputs a stable enable signal.

[0012] In one implementation of the present application, the DC-DC boost circuit includes: a first capacitor, a second capacitor, a first inductor, a first diode, and a DC / DC chip;

[0013] One end of the first capacitor is connected to one end of the first inductor to serve as the first end of the DC-DC boost circuit;

[0014] The other end of the first inductor is connected to the anode of the first diode and the input end of the DC / DC chip respectively;

[0015] The cathode of the first diode is connected to the output end of the DC / DC chip and one end of the second capacitor respectively, serving as the second end of the DC-DC boost circuit.

[0016] In one implementation of the present application, the voltage divider circuit includes: a first voltage divider resistor, a second voltage divider resistor;

[0017] The power supply module is connected to one end of the first voltage-dividing resistor, and the other end of the first voltage-dividing resistor is respectively connected to the input end of the comparison circuit and one end of the second voltage-dividing resistor, for dividing the supply voltage of the power supply module and sampling it to the comparison circuit.

[0018] In one implementation of the present application, the comparison circuit includes: a comparator, an NMOS transistor, and a first resistor;

[0019] The positive input terminal and the negative input terminal of the comparator serve as input terminals of the comparison circuit, respectively, and are connected to different voltage divider circuits, so as to output a high level when the supply voltage of the positive input terminal is greater than the supply voltage of the negative input terminal, and output a low level when the supply voltage of the positive input terminal is less than the supply voltage of the negative input terminal;

[0020] The output end of the comparator is connected to the gate of the NMOS transistor, and the drain of the NMOS transistor is respectively connected to one end of the first resistor, for inverting the high level or the low level;

[0021] The output end of the comparator and the drain of the NMOS transistor serve as the output end of the comparison circuit respectively, and are connected to different switch circuits for outputting the enable signal so that the switch circuit receiving the enable signal at the low level closes the circuit.

[0022] In one implementation of the present application, the switch circuit includes: a first switch PMOS transistor, a second switch PMOS transistor;

[0023] The gate of the first switch PMOS transistor is electrically connected to the gate of the second switch PMOS transistor and serves as the selected closing end of the switch circuit. The drain of the first switch PMOS transistor is electrically connected to the drain of the second switch PMOS transistor. The source of the first switch PMOS transistor is connected to the power module. The source of the second switch PMOS transistor serves as the output end of the switch circuit and is connected to the module to be powered. The transistors are configured to turn on or off the first switch PMOS transistor and the second switch PMOS transistor according to the enable signal, so as to close or open the switch circuit.

[0024] In one implementation of the present application, the power supply device further includes: a stabilization control circuit;

[0025] The stabilization control circuit is provided between the output terminal of the comparison circuit and the selection closing terminal of the switch circuit, and includes a first stabilization resistor, a second stabilization resistor, a third stabilization resistor, and a stabilization transistor, and is used to control the on-off state of the stabilization transistor according to the enable signal to control the switch circuit to close or open the circuit;

[0026] One end of the first stabilizing resistor is connected to the output end of the comparison circuit, and the other end of the first stabilizing resistor is connected to the base of the stabilizing transistor and one end of the second stabilizing resistor respectively;

[0027] The emitter of the stabilizing transistor is connected to one end of the third stabilizing resistor;

[0028] The other end of the second stabilizing resistor and the other end of the third stabilizing resistor are respectively connected to the selection closing end.

[0029] In one implementation of the present application, the power supply device further includes an external power supply module connected to the module to be powered, for providing external power to the module to be powered.

[0030] In one implementation of the present application, the external power supply module includes: a plurality of output isolation diodes, a second diode;

[0031] The anode of each output isolation diode is connected to the external power supply module, and the cathode of each output isolation diode is connected to the connection point between the selected closing end of the corresponding switch circuit and the output end of the comparison circuit.

[0032] The anode of the second diode is connected to the external power supply module, and the cathode of the second diode is connected to the module to be powered.

[0033] In one implementation of the present application, the multiple power modules include at least two battery packs; and the battery packs are not electrically connected to each other.

[0034] On the other hand, an embodiment of the present application further provides an atomizer, characterized in that the atomizer includes a power supply device and a module to be powered; the power supply device includes: a plurality of power modules, a plurality of voltage divider circuits corresponding to the number of the power modules, and a comparison circuit connected to each of the voltage divider circuits;

[0035] Each of the power supply modules is electrically connected to the modules to be powered via a switch circuit, and is used to supply power to the modules to be powered respectively;

[0036] Each of the voltage dividing circuits is connected to the corresponding power supply module, and is used to perform voltage division sampling on the corresponding power supply module to obtain a supplyable voltage;

[0037] The comparison circuit is electrically connected to each of the voltage divider circuits, and is used to receive each of the supplyable voltages through an input terminal of the comparison circuit, compare each of the supplyable voltages, and output an enable signal for switching one of the power modules to become the power supply module according to the comparison result;

[0038] Each of the switching circuits is connected to the output end of the comparison circuit by selecting the closing end, and is used to close the circuit of the switching circuit with a one-to-one mapping electrical connection relationship between the power supply modules according to the enable signal, so as to power the module to be powered connected to the output end of the switching circuit.

[0039] The beneficial effects of this application include but are not limited to:

[0040] 1) Through the above solution, the present application can set up switching circuits for multiple power modules, allowing each power module to supply power to the module to be powered separately, while switching power to the power module based on the available supply voltage. This achieves balanced discharge of each power module, improves the power supply capacity of the power supply circuit, and thus increases the power supply endurance of the module to be powered.

[0041] 2) The circuit design of this application can avoid mutual influence between power modules, avoid mutual charging and discharging or battery leakage and other problems, and can safely and reliably improve the endurance of electrical appliances.

[0042] 3) This application realizes stable and reliable automatic switching of multiple power supplies through hardware circuits, without the need for software control, thus saving development costs.

[0043] 4) The power module of the present application does not improve the battery life by simply increasing the number of batteries in series, but rather improves the battery life by dividing the power module into multiple groups through circuit design and switching the power supply. It will not increase the host operating voltage and can avoid the increase of the host working and standby power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0045] Figure 1 This is a structural diagram of a power supply device in an embodiment of the present application;

[0046] Figure 2 This is another structural schematic diagram of a power supply device in an embodiment of the present application;

[0047] Figure 3 This is a circuit schematic diagram of a DC-DC boost circuit of a power supply device according to an embodiment of the present application;

[0048] Figure 4 This is a circuit schematic diagram of a voltage divider circuit of a power supply device according to an embodiment of the present application;

[0049] Figure 5 This is a circuit schematic diagram of a comparison circuit of a power supply device according to an embodiment of the present application;

[0050] Figure 6 This is a circuit schematic diagram of a first stabilization control circuit of a power supply device according to an embodiment of the present application;

[0051] Figure 7 This is a circuit schematic diagram of a second stabilization control circuit of a power supply device according to an embodiment of the present application;

[0052] Figure 8 This is a circuit diagram of a power supply device according to an embodiment of the present application;

[0053] Figure 9 This is a structural diagram of an atomizer in an embodiment of the present application.

[0054] List of parts and reference numerals:

[0055] 100, power supply device; 110, power module; 111, first power module; 112, second power module; 120, voltage divider circuit; 121, first voltage divider circuit; 122, second voltage divider circuit; 130, comparison circuit; 140, switch circuit; 141, first switch circuit; 142, second switch circuit; 150, DC-DC boost circuit; 160, stability control circuit; 161, first stability control circuit; 162, second stability control circuit; 200, module to be powered; 300, external power supply module; C6, first capacitor; C11, second capacitor; L4, first inductor; D11, first diode; U3, DC / DC chip; D10, second diode; D8, first output isolation diode; D9, second output isolation diode; R 14, first voltage-divider resistor of path 1; R15, second voltage-divider resistor of path 1; R19, first voltage-divider resistor of path 2; R20, second voltage-divider resistor of path 2; U2A, comparator; Q17, NMOS transistor; R27, first resistor; Q11, first switch PMOS transistor of switch 1; Q12, second switch PMOS transistor of switch 1; Q14, first switch PMOS transistor of switch 2; Q15, second switch PMOS transistor of switch 2; R17, first stabilizing resistor of switch 1; R18, second stabilizing resistor of switch 1; R16, third stabilizing resistor of switch 1; Q13, stabilizing transistor of switch 1; R23, first stabilizing resistor of switch 2; R24, second stabilizing resistor of switch 2; R22, third stabilizing resistor of switch 2; Q16, stabilizing transistor of switch 2. DETAILED DESCRIPTION

[0056] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0057] The embodiments of the present application provide a power supply device and an atomizer, which are used to solve the technical problems that the current atomizer power supply has poor battery life and is difficult to safely improve the battery life.

[0058] The following describes in detail various embodiments of the present application with reference to the accompanying drawings.

[0059] The embodiment of the present application provides a power supply device such as Figure 1 As shown, the power supply device 100 includes: a plurality of power modules 110 , a plurality of voltage dividing circuits 120 corresponding to the number of the power modules 110 , and a comparison circuit 130 connected to each of the voltage dividing circuits 120 .

[0060] Each power module 110 is electrically connected to the module to be powered 200 via a switch circuit 140, and is used to supply power to the module to be powered 200. Each voltage divider circuit 120 is connected to the corresponding power module 110 and is used to perform voltage sampling on the corresponding power module 110 to obtain a supplyable voltage. A comparison circuit 130 is electrically connected to each voltage divider circuit 120 and is used to receive each supplyable voltage through the input terminal of the comparison circuit 130, compare the supplyable voltages, and output an enable signal to switch one of the power modules 110 to become the power supply module based on the comparison result. Each switch circuit 140 is connected to the output terminal of the comparison circuit 130 by selecting a closing terminal. It is used to close the switch circuit 140 with a one-to-one electrical connection relationship with the power supply module according to the enable signal, so as to power the module to be powered 200 connected to the output terminal of the switch circuit 140.

[0061] That is, the power supply device can be provided with multiple power supply modules, and each voltage divider circuit can be used to sample the voltage in each power supply module, and the comparison circuit can compare the supply voltage after the voltage division sampling. Based on the comparison result, a power supply module is selected to supply power to the module to be powered, for example, a power supply module with a higher current voltage is selected to supply power to the module to be powered. Among them, the switching circuit electrically connects the power supply module to the module to be powered. Before the comparison circuit performs voltage comparison, the switching circuit can disconnect the circuit between the power supply module and the module to be powered. After the voltage comparison, the switching circuit can be selectively closed according to the enable signal corresponding to the voltage comparison result, thereby flexibly allowing the power supply module to supply power to the module to be powered. Figure 1 Taking the power supply device having two power modules as an example, in actual use, the number of power modules can be increased, and this application does not make any specific restrictions on this.

[0062] For example, the first power module 111 and the second power module 112 supply power to the module to be powered 200. The voltage of the first power module 111 passes through the first voltage divider circuit 121 and reaches the comparison circuit 130. The voltage of the second power module 112 passes through the second voltage divider circuit 122 and reaches the comparison circuit 130. The comparison circuit 130 compares the first available supply voltage from the first voltage divider circuit 121 with the second available supply voltage from the second voltage divider circuit 122. For example, if the comparison result shows that the first available supply voltage is greater than the second available supply voltage, the first power module 111 will function as the power supply module. At this time, the enable signal will cause the first switch circuit 141 to close and the second switch circuit 142 to remain open, thereby causing the first power module 111 to supply power to the module to be powered 200 until the first available supply voltage is less than the second available supply voltage.

[0063] It should be noted that the power module can be any electrical appliance that can store electricity, including but not limited to dry cells and storage batteries.

[0064] In one embodiment of the present application, the plurality of power modules 110 include at least two battery packs, and the battery packs are not electrically connected to each other.

[0065] For example, the power supply device has two battery packs, each battery pack is composed of multiple No. 5 alkaline batteries connected in series, and there is no electrical connection between each battery pack. The voltage of one battery pack is 3V (volts).

[0066] In one embodiment of the present application, Figure 2 As shown, the power supply device 100 further includes a DC-DC boost circuit 150 .

[0067] The first end of the DC-DC boost circuit 150 is electrically connected to one of the multiple power modules 110, and the second end is electrically connected to the comparison circuit 130, for boosting the voltage of the connected power module 110 and supplying power to the comparison circuit 130, so that the comparison circuit outputs a stable enable signal. Figure 2 Take the DC-DC boost circuit 150 being connected to the first power module as an example.

[0068] That is to say, the present application can select a power supply module to supply power to the comparison circuit so that the comparison circuit can realize the voltage comparison function. Taking the above two power supply modules as an example, the first end of the DC-DC boost circuit can be connected to the first power supply module or the second power supply module, and the present application does not make specific restrictions on this. The present application uses a DC-DC boost circuit, which can still perform voltage boosting processing even when the power supply module consumes power, so as to continuously and stably power the comparison circuit, thereby increasing the service life and service life of the power supply device.

[0069] In one embodiment of the present application, the circuit schematic diagram of the DC-DC boost circuit is as follows: Figure 3 As shown, it includes: a first capacitor C6, a second capacitor C11, a first inductor L4, a first diode D11, and a DC / DC chip U3.

[0070] One end of the first capacitor C6 is connected to one end of the first inductor L4, and is connected to the battery working mode dedicated pin of the power module as the first end of the DC-DC boost circuit. Taking the DC-DC boost circuit connected to the first power module as an example, the first end of the DC-DC boost circuit is connected to the battery working mode dedicated pin VBAT1 of the first power module, and the other end of the first capacitor C6 is grounded. GND represents the grounding end of the wire, and this application will not go into details. The other end of the first inductor L4 is respectively connected to the positive electrode of the first diode D11 and the input terminal Vin (pin 2) of the DC / DC chip U3. The negative electrode of the first diode D11 is respectively connected to the output terminal Vout (pin 3) of the DC / DC chip U3 and one end of the second capacitor C11, as the second end of the DC-DC boost circuit, and the pin VCC4 (power supply voltage) is connected to the comparison circuit for power supply. Pin 1 of U3 is grounded.

[0071] In the embodiment of the present application, C6 in the above-mentioned DC-DC boost circuit can provide a stable input current, improve the response time and stabilize the voltage input to U3. C11 is an output capacitor, which is used to reduce the output voltage ripple and current ripple. Since the voltage output by the DC / DC chip is a fluctuating voltage, the output parallel capacitor can effectively reduce the fluctuation of the output voltage and enhance the load capacity of the circuit. L4 cooperates with the DC / DC chip to realize the boost function, and D11 is a freewheeling diode. The above-mentioned first capacitor C6, second capacitor C11, first inductor L4, first diode D11, and DC / DC chip U3 together constitute a DC-DC boost circuit. U3 can use chips such as H8118A40PR, ME2108A33PG, etc., and other types of chips can also be used. This application does not specifically limit this. In an example, L4 can be 47uH (microhenry), C6 and C11 can be 10uF to 22uF (microfarad), and D11 can be SS14, SS34 and other type diodes. The parameters of the specific components can be selected by yourself during actual use. This application only provides an exemplary existence here, and this application does not make specific limitations on the specific parameters of the components.

[0072] In one embodiment of the present application, the voltage divider circuit is connected to the power module, and the voltage divider circuit includes: a first voltage divider resistor and a second voltage divider resistor.

[0073] The power supply module is connected to one end of the first voltage-dividing resistor, and the other end of the first voltage-dividing resistor is respectively connected to the input end of the comparison circuit and one end of the second voltage-dividing resistor, for dividing the power supply voltage of the power supply module and sampling it to the comparison circuit.

[0074] like Figure 4As shown, the voltage divider circuit is connected to the power modules, with one voltage divider circuit corresponding to each power module. Taking two power modules as an example, one end of the first voltage divider circuit is connected to VBAT1 of the first power module, and one end of the second voltage divider circuit is connected to VBAT2 of the second power module. The other end of the first voltage divider circuit is connected to the first input of the comparator circuit, such as the positive input of pin 3 of comparator U2A; the other end of the second voltage divider circuit is connected to the second input of the comparator circuit, such as the negative input of pin 2 of comparator U2A.

[0075] Specifically, the first voltage-dividing resistor of path 1 in the first voltage-dividing circuit is R14, and the second voltage-dividing resistor of path 1 is R15. One end of R14 is connected to the first power supply module through VBAT1, and the other end is respectively connected to the positive phase input terminal of the comparator U2A in the comparison circuit and one end of R15; the first voltage-dividing resistor of path 2 in the second voltage-dividing circuit is R19, and the second voltage-dividing resistor of path 2 is R20. One end of R19 is connected to the second power supply module through VBAT2, and the other end of R19 is respectively connected to the negative phase input terminal of the comparator U2A in the comparison circuit and one end of R20.

[0076] For example, VBAT1 and VBAT2 are sampled at the positive and negative inputs of U2A through resistors R14, R15, and R19, R20, respectively. If the voltage of VBAT1 is greater than that of VBAT2, the voltage at U2A's positive input will be greater than that at its negative input. Based on the comparator's characteristics, U2A's output will output a high level. Conversely, if the voltage of VBAT1 is less than that of VBAT2, U2A's output will output a low level. When the voltages of VBAT1 and VBAT2 are equal—that is, the available supply voltage at the positive input equals the available supply voltage at the negative input—the comparator can default to a low level. The different comparator outputs can be used to control the closing or opening of different switching circuits, selecting different power modules to power the module to be powered.

[0077] In one embodiment of the present application, Figure 5 As shown, the comparison circuit 130 includes: a comparator U2A, an NMOS transistor Q17, and a first resistor R27.

[0078] The positive input terminal V+ and the negative input terminal V- of the comparator U2A serve as the input terminals of the comparison circuit and are connected to different voltage divider circuits. They are configured to output a high level when the supply voltage at the positive input terminal is greater than the supply voltage at the negative input terminal, and to output a low level when the supply voltage at the positive input terminal is less than the supply voltage at the negative input terminal. The output terminal of the comparator U2A is connected to the gate of an NMOS transistor Q17, and the drain of the NMOS transistor Q17 is connected to one end of a first resistor R27, respectively, for inverting the high or low level. The output terminal 1 pin of the comparator U2A and the drain of the NMOS transistor Q17 serve as the output terminals of the comparison circuit and are connected to different switch circuits for outputting an enable signal, causing the switch circuit that receives the low enable signal to close the circuit. In addition, pin 4 of comparator U2A is used for power supply and connected to the DC-DC boost circuit pin VCC4, and pin 5 is grounded; the source of Q17 is grounded; the other end of R27 is connected to the DC-DC boost circuit pin VCC4, and R27 acts as a current limiting protection circuit.

[0079] In other words, when the output of comparator U2A is high or low, it can close different switch circuits. For example, with two power modules, when the output enable signal COMP OUT is high, the select-close terminal of one switch circuit, such as the second switch circuit, receives a high signal. Since Q17 inverts the high signal and the enable signal ~COMPOUT is low, the select-close terminal of the first switch circuit receives a low signal.

[0080] In one embodiment of the present application, the switch circuit includes: a first switch PMOS transistor and a second switch PMOS transistor.

[0081] The gate of the first switch PMOS transistor is electrically connected to the gate of the second switch PMOS transistor and serves as a selective closing end of the switch circuit. The drain of the first switch PMOS transistor is electrically connected to the drain of the second switch PMOS transistor. The source of the first switch PMOS transistor is connected to the switch circuit. The source of the second switch PMOS transistor serves as an output end of the switch circuit and is connected to the module to be powered. The transistor is configured to turn on or off the first switch PMOS transistor and the second switch PMOS transistor according to an enable signal, so as to close or open the switch circuit.

[0082] Take this application as an example with two power modules, two switch circuits such as Figure 6 、 Figure 7 As shown, the first switch circuit is connected to VBAT1 of the first power module, the second switch circuit is connected to VBAT2 of the second power module, and both switch circuits are connected to the power supply pin VBUS+ of the module to be powered.

[0083] The first switch circuit includes a first PMOS transistor Q11 and a second PMOS transistor Q12. The gate G of the first PMOS transistor Q11 is electrically connected to the gate G of the second PMOS transistor Q12 and serves as a selective closing terminal of the switch circuit. The drain D of the first PMOS transistor Q11 is electrically connected to the drain D of the second PMOS transistor Q12. The source S of the first PMOS transistor Q11 serves as an input terminal of the switch circuit and is connected to VBAT1 of the power module. The source S of the second PMOS transistor Q12 serves as an output terminal of the switch circuit and is connected to VBUS+ of the module to be powered. The first PMOS transistor and the second PMOS transistor are turned on or off according to an enable signal. In actual use, when the enable signal is at a low level, the first PMOS transistor and the second PMOS transistor are turned on, thereby connecting the circuit between the first power module and the module to be powered, and the first power module supplies power to the module to be powered.

[0084] The second switch circuit includes a first switch PMOS transistor Q14 of switch 2 and a second switch PMOS transistor Q15 of switch 2. A gate G of the first switch PMOS transistor Q14 of switch 2 is electrically connected to a gate G of the second switch PMOS transistor Q15 of switch 2 and serves as a selective closing end of the switch circuit. A drain D of the first switch PMOS transistor Q14 of switch 2 is electrically connected to a drain D of the second switch PMOS transistor Q15 of switch 2. A source S of the first switch PMOS transistor Q14 of switch 2 serves as an input end of the switch circuit and is connected to VBAT2 of the power module. A source S of the second switch PMOS transistor Q15 of switch 2 serves as an output end of the switch circuit and is connected to VBUS+ of the module to be powered, and is used to turn on or off the first switch PMOS transistor and the second switch PMOS transistor of switch 2 according to an enable signal.

[0085] In another embodiment of the present application, Figure 2 As shown, the power supply device 100 further includes a stabilization control circuit 160 , which is disposed between the output terminal of the comparison circuit and the selection closing terminal of the switch circuit and includes a first stabilization control circuit 161 and a second stabilization control circuit 162 .

[0086] refer to Figure 6 、 Figure 7The stabilization control circuit includes a first stabilizing resistor, a second stabilizing resistor, a third stabilizing resistor, and a stabilizing transistor, and is used to control the on / off state of the stabilizing transistor through an enable signal to control the switch circuit to close or open the circuit. One end of the first stabilizing resistor is connected to the output end of the comparison circuit, and the other end of the first stabilizing resistor is respectively connected to the base of the stabilizing transistor and one end of the second stabilizing resistor. The emitter of the stabilizing transistor is connected to one end of the third stabilizing resistor. The other ends of the second stabilizing resistor and the other ends of the third stabilizing resistor are respectively connected to the selection closing end.

[0087] Among them, the second stabilizing resistor is a pull-up resistor, and the stabilizing transistor is a PNP transistor. When the pull-up resistor is passed, the stabilizing transistor is closed in the default state. After the comparison circuit has an output, the stabilizing transistor is turned on to enhance the power supply stability of the circuit.

[0088] Specifically, the first stabilization control circuit connected to the first switch circuit includes a first stabilization resistor R17, a second stabilization resistor R18, a third stabilization resistor R16, and a first stabilization transistor Q13. One end of the first stabilization resistor R17 is connected to the output of the comparison circuit to receive the enable signal ~COMP OUT. The other end of the first stabilization resistor R17 is connected to the base of the first stabilization transistor Q13 and one end of the second stabilization resistor R18. The emitter of the first stabilization transistor Q13 is connected to one end of the third stabilization resistor R16. The other ends of the second stabilization resistor R18 and the other ends of the third stabilization resistor R16 are each connected to the selected closing end of the first switch circuit.

[0089] The second stabilization control circuit connected to the second switch circuit includes a first stabilization resistor R23 of switch 2, a second stabilization resistor R24 ​​of switch 2, a third stabilization resistor R22 of switch 2, and a stabilization transistor Q16 of switch 2. One end of the first stabilization resistor R23 of switch 2 is connected to the output of the comparison circuit to receive the enable signal COMP OUT. The other end of the first stabilization resistor R23 of switch 2 is respectively connected to the base of the stabilization transistor Q16 of switch 2 and one end of the second stabilization resistor R24 ​​of switch 2. The emitter of the stabilization transistor Q16 of switch 2 is connected to one end of the third stabilization resistor R22 of switch 2. The other ends of the second stabilization resistor R24 ​​of switch 2 and the other ends of the third stabilization resistor R22 of switch 2 are respectively connected to the selected closing end of the second switch circuit.

[0090] For example, if COMP OUT is high, then ~COMP OUT is low. Due to transistor characteristics, Q16's emitter and collector are disconnected, and R22 is floating. The gates of Q14 and Q15 are floating, turning off Q14 and Q15, and disconnecting VBAT2 from VBUS+. Since the first and second stabilization control circuits are identical, VBAT1 is turned on. In contrast to the control process described above, Q13's emitter and collector are closed, and Q11 and Q12 are closed. VBAT1 now supplies power to VBUS+.

[0091] Q11, Q12, Q14, and Q15 can prevent VBAT1 or VBAT2 from being directly connected to the module to be powered, thus avoiding the problem of two battery groups being connected in parallel, which may cause mutual charging and discharging between the batteries or lead to battery leakage.

[0092] In one embodiment of the present application, Figure 2 As shown, the power supply device 100 further includes an external power supply module 300 connected to the module to be powered 200 , for providing external power to the module to be powered 200 .

[0093] refer to Figure 8 , Figure 8 This is a circuit schematic diagram of a power supply device. In an embodiment of the present application, the external power supply module 300 includes: multiple output isolation diodes and a second diode.

[0094] The anode of each output isolation diode is connected to the external power supply module, and the cathode of each output isolation diode is connected to the connection between the selected closing end of the corresponding switch circuit and the output end of the comparison circuit. The anode of the second diode is connected to the external power supply module, and the cathode of the second diode is connected to the module to be powered.

[0095] D8 is the first output isolation diode, D9 is the second output isolation diode, and D10 is the second diode. The external power supply module is connected to the circuit of the power supply device through the pin VUSB. The external power supply module can be understood as being connected to a household AC power supply, an external power bank, etc. This application does not specifically limit this. The positive pole of the first output isolation diode D8 is connected to the VUSB of the external power supply module, and the negative pole of the first output isolation diode D8 is connected to the connection between the selection closing end of the first switch circuit and the output end of the comparison circuit, that is, one end of R17 and the drain of Q17 are respectively connected. The positive pole of the second output isolation diode D9 is connected to the VUSB of the external power supply module, and the negative pole of the second output isolation diode D9 is connected to the connection between the selection closing end of the second switch circuit and the output end of the comparison circuit, that is, one end of R23 and the output end of U2A are respectively connected. The positive pole of the second diode D10 is connected to the external power supply module, and the negative pole of the second diode D10 is connected to the pin VBUS+ of the module to be powered.

[0096] In this embodiment of the present application, when VUSB is connected, the supply voltage of VUSB is at least greater than the supply voltage of VBAT1 and VBAT2. At this point, the supply voltage of the external power supply module reaches the bases of Q13 and Q16 through diodes D8 and D9. At this point, according to the transistor characteristics, the collectors and emitters of Q13 and Q16 are turned off, which means that Q11, Q12, Q14, and Q15 are all turned off. At this point, VBAT1 and VBAT2 are disconnected from VBUS+. VUSB is then connected to VBUS+ through diode D10, providing power to the module to be powered.

[0097] The above-mentioned D8 and D9 can prevent the output of U2A and Q17 from flowing back into the control loop, isolating the outputs of U2A and Q17 and avoiding switching errors. D10 can prevent the VBUS+ output from flowing back into the control loop, isolating VBUS+ from the control pin that controls the on / off of the transistor and avoiding switching errors.

[0098] Through the above scheme, the present application can set up switching circuits for multiple power modules respectively, so that each power module can supply power to the module to be powered separately, and at the same time switch the power supply of the power module according to the available supply voltage. This can achieve balanced discharge of each power module, improve the power supply capacity of the power supply circuit, and thus improve the power supply life of the module to be powered. At the same time, the circuit design of the present application can avoid mutual influence between power modules, avoid problems such as mutual charging and discharging or battery leakage, and can safely and reliably improve the life of electrical appliances.

[0099] Furthermore, the present application achieves stable and reliable automatic switching of multiple power sources through hardware circuits, eliminating the need for software control and saving development costs. Furthermore, the present application's power module improves battery life not by simply increasing the number of batteries in series, but rather by dividing the power supply into multiple groups through circuit design and switching power supply. This does not increase the host operating voltage, thus avoiding increased power consumption during both operating and standby periods.

[0100] Figure 9 A schematic diagram of the structure of an atomizer provided in an embodiment of the present application is shown in FIG. Figure 9 As shown, the atomizer includes a power supply device 100 and a module 200 to be powered.

[0101] The power supply device 100 includes a plurality of power supply modules, a plurality of voltage dividing circuits corresponding to the number of the power supply modules, and a comparison circuit connected to each of the voltage dividing circuits.

[0102] Each power supply module is electrically connected to the module to be powered via a switching circuit, and is used to supply power to the module to be powered. Each voltage divider circuit is connected to the corresponding power supply module, and is used to perform voltage division sampling on the corresponding power supply module to obtain a supplyable voltage. A comparison circuit is electrically connected to each voltage divider circuit, and is used to receive each supplyable voltage through the input end of the comparison circuit, compare each supplyable voltage, and output an enable signal for switching one of the power supply modules to become the power supply module based on the comparison result. Each switching circuit is connected to the output end of the comparison circuit by selecting the closing end, and is used to close the switching circuit with a one-to-one mapping electrical connection relationship between the power supply modules according to the enable signal, so as to supply power to the module to be powered connected to the output end of the switching circuit.

[0103] The atomizer provided with the above-mentioned power supply device can greatly improve the battery life and safety.

[0104] The various embodiments in this application are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from other embodiments. In particular, the atomizer embodiment is generally similar to the power supply embodiment, so the description is relatively simple. For relevant parts, refer to the description of the device embodiment.

[0105] The product atomizer provided in the embodiment of the present application corresponds one-to-one to the device. Therefore, the product atomizer also has similar beneficial technical effects as its corresponding device. Since the beneficial technical effects of the device have been described in detail above, the beneficial technical effects of the product atomizer will not be repeated here.

[0106] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0107] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A power supply device, characterized in that: The power supply device includes: a plurality of power modules, a plurality of voltage divider circuits corresponding to the number of the power modules, and a comparison circuit connected to each of the voltage divider circuits; Each of the power supply modules is electrically connected to the modules to be powered via a switch circuit, and is used to supply power to the modules to be powered respectively; Each of the voltage dividing circuits is connected to the corresponding power supply module, and is used to perform voltage division sampling on the corresponding power supply module to obtain a supplyable voltage; The comparison circuit is electrically connected to each of the voltage divider circuits, and is used to receive each of the supplyable voltages through an input terminal of the comparison circuit, compare each of the supplyable voltages, and output an enable signal for switching one of the power modules to become the power supply module according to the comparison result; Each of the switching circuits is connected to the output end of the comparison circuit by selecting the closing end, and is used to close the circuit of the switching circuit with a one-to-one mapping electrical connection relationship between the power supply modules according to the enable signal, so as to power the module to be powered connected to the output end of the switching circuit.

2. A power supply device according to claim 1, characterized in that: The power supply device also includes a DC-DC boost circuit; The first end of the DC-DC boost circuit is electrically connected to one of the multiple power modules, and the second end is electrically connected to the comparison circuit, for boosting the voltage of the connected power module and supplying power to the comparison circuit so that the comparison circuit outputs a stable enable signal.

3. A power supply device according to claim 2, characterized in that: The DC-DC boost circuit includes: a first capacitor, a second capacitor, a first inductor, a first diode, and a DC / DC chip; One end of the first capacitor is connected to one end of the first inductor to serve as the first end of the DC-DC boost circuit; The other end of the first inductor is connected to the anode of the first diode and the input end of the DC / DC chip respectively; The cathode of the first diode is connected to the output end of the DC / DC chip and one end of the second capacitor respectively, serving as the second end of the DC-DC boost circuit.

4. The power supply device according to claim 1, characterized in that: The voltage dividing circuit includes: a first voltage dividing resistor and a second voltage dividing resistor; The power supply module is connected to one end of the first voltage-dividing resistor, and the other end of the first voltage-dividing resistor is respectively connected to the input end of the comparison circuit and one end of the second voltage-dividing resistor, for dividing the supply voltage of the power supply module and sampling it to the comparison circuit.

5. The power supply device according to claim 1, characterized in that: The comparison circuit includes: a comparator, an NMOS transistor, and a first resistor; The positive input terminal and the negative input terminal of the comparator serve as input terminals of the comparison circuit, respectively, and are connected to different voltage divider circuits, so as to output a high level when the supply voltage of the positive input terminal is greater than the supply voltage of the negative input terminal, and output a low level when the supply voltage of the positive input terminal is less than the supply voltage of the negative input terminal; The output end of the comparator is connected to the gate of the NMOS transistor, and the drain of the NMOS transistor is respectively connected to one end of the first resistor, for inverting the high level or the low level; The output end of the comparator and the drain of the NMOS transistor serve as the output end of the comparison circuit respectively, and are connected to different switch circuits for outputting the enable signal so that the switch circuit receiving the enable signal at the low level closes the circuit.

6. The power supply device according to claim 1, characterized in that: The switch circuit includes: a first switch PMOS transistor and a second switch PMOS transistor; The gate of the first switch PMOS transistor is electrically connected to the gate of the second switch PMOS transistor and serves as the selected closing end of the switch circuit. The drain of the first switch PMOS transistor is electrically connected to the drain of the second switch PMOS transistor. The source of the first switch PMOS transistor is connected to the power module. The source of the second switch PMOS transistor serves as the output end of the switch circuit and is connected to the module to be powered. The transistors are configured to turn on or off the first switch PMOS transistor and the second switch PMOS transistor according to the enable signal, so as to close or open the switch circuit.

7. A power supply device according to claim 6, characterized in that: The power supply device further includes: a stabilization control circuit; The stabilization control circuit is provided between the output terminal of the comparison circuit and the selection closing terminal of the switch circuit, and includes a first stabilization resistor, a second stabilization resistor, a third stabilization resistor, and a stabilization transistor, and is used to control the on-off state of the stabilization transistor according to the enable signal to control the switch circuit to close or open the circuit; One end of the first stabilizing resistor is connected to the output end of the comparison circuit, and the other end of the first stabilizing resistor is connected to the base of the stabilizing transistor and one end of the second stabilizing resistor respectively; The emitter of the stabilizing transistor is connected to one end of the third stabilizing resistor; The other end of the second stabilizing resistor and the other end of the third stabilizing resistor are respectively connected to the selection closing end.

8. A power supply device according to any one of claims 1 to 7, characterized in that: The power supply device further includes an external power supply module connected to the module to be powered, for providing external power to the module to be powered.

9. The power supply device according to claim 8, characterized in that: The external power supply module includes: a plurality of output isolation diodes and a second diode; The anode of each output isolation diode is connected to the external power supply module, and the cathode of each output isolation diode is connected to the connection point between the selected closing end of the corresponding switch circuit and the output end of the comparison circuit. The anode of the second diode is connected to the external power supply module, and the cathode of the second diode is connected to the module to be powered.

10. The power supply device according to claim 1, characterized in that: The multiple power modules include at least two battery packs; and the battery packs are not electrically connected to each other.

11. An atomizer, characterized in that: The atomizer includes a power supply device according to any one of claims 1 to 10 and a module to be powered.

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