CN213125615U - Power supply circuit and household appliance - Google Patents
Power supply circuit and household appliance Download PDFInfo
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- CN213125615U CN213125615U CN202021883537.4U CN202021883537U CN213125615U CN 213125615 U CN213125615 U CN 213125615U CN 202021883537 U CN202021883537 U CN 202021883537U CN 213125615 U CN213125615 U CN 213125615U
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Abstract
The application provides a power supply circuit and a household appliance, wherein the power supply circuit comprises an input port, a first voltage input port and a second voltage input port, wherein the input port is configured to input a first voltage; a battery management circuit connected to the input port, configured to be charged with the first voltage, and output a second voltage; an output port configured to connect an external device; a switching circuit connected to the input port, the battery management circuit and the output port, and configured to select the first voltage or the second voltage to power the external device; wherein the first voltage and the second voltage have different voltage values. The power supply circuit can select different power supply modes to achieve optimal efficiency and has high reliability; the voltage-reducing circuit is suitable for various working voltages, voltage reduction or voltage boosting processing of output voltage is not needed, and energy loss is reduced.
Description
Technical Field
The application relates to the technical field of power supply control, in particular to a power supply circuit and a household appliance.
Background
In an electrical apparatus, in order to improve the convenience of the electrical apparatus, a commercial power supply and a backup battery are generally provided in a power supply circuit, and the two power supplies can be selected according to different working states.
However, the voltage provided by the utility power and the voltage provided by the backup battery are not consistent, so a voltage boosting or voltage reducing circuit is generally arranged in the power supply circuit to boost or reduce the voltage provided by the utility power or the voltage provided by the backup battery, and the power supply circuit supplies power to the electrical equipment when the voltage is adjusted to the preset power supply voltage. However, the power supply voltage is output in a voltage boosting or voltage reducing mode, extra loss of electric energy exists, and the experience of a user is poor.
SUMMERY OF THE UTILITY MODEL
The application provides power supply circuit and domestic appliance to solve among the prior art because step-up or step-down handles the problem that leads to the extra loss of electric energy.
In order to solve the above technical problem, the present application provides a power supply circuit, including an input port configured to input a first voltage; a battery management circuit connected to the input port, configured to be charged with a first voltage, and output a second voltage; an output port configured to connect an external device; the switching circuit is connected with the input port, the battery management circuit and the output port and is configured to select the first voltage or the second voltage to supply power to the external equipment; wherein the first voltage and the second voltage have different voltage values.
In order to solve the technical problem, the present application provides a household appliance, which includes the above power supply circuit.
The application discloses a power supply circuit, which comprises an input port, a first voltage input port and a second voltage input port, wherein the input port is configured to input a first voltage; a battery management circuit connected to the input port, configured to be charged with a first voltage, and output a second voltage; an output port configured to connect an external device; the switching circuit is connected with the input port, the battery management circuit and the output port and is configured to select the first voltage or the second voltage to supply power to the external equipment; wherein the first voltage and the second voltage have different voltage values. The power supply circuit can select different power supply modes to achieve optimal efficiency and has high reliability; the voltage-reducing circuit is suitable for various working voltages, voltage reduction or voltage boosting processing of output voltage is not needed, and energy loss is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the description will be briefly introduced below, it is obvious that the drawings in the following description are only some of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a schematic circuit diagram of an embodiment of a power supply circuit provided in the present application;
FIG. 2 is a schematic diagram of another embodiment of a power supply circuit provided in the present application;
fig. 3 is a schematic circuit structure diagram of a first embodiment of the power supply circuit provided in the present application;
fig. 4 is a schematic circuit structure diagram of a second embodiment of the power supply circuit provided in the present application;
fig. 5 is a schematic circuit structure diagram of a third embodiment of the power supply circuit provided in the present application;
fig. 6 is a schematic circuit diagram of a fourth embodiment of the power supply circuit provided in the present application;
fig. 7 is a schematic structural diagram of an embodiment of a household appliance provided by the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present application, the power supply circuit 100 and the household appliance provided by the present invention are further described in detail below with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 and fig. 2 together, fig. 1 is a schematic structural diagram of an embodiment of a power supply circuit provided in the present application. Fig. 2 is a schematic structural diagram of another embodiment of the power supply circuit provided in the present application. The power supply circuit 100 may include an input port 110, a battery management circuit 120, an output port 130, and a patching circuit 140.
Wherein the input port 110 may be configured to input a first voltage. The first voltage may be a voltage converted by an external grid voltage, the input port 110 may be connected to an external grid through a power adapter to obtain the first voltage, the external grid voltage is generally a mains voltage, the first voltage is generally an adapted voltage obtained by converting the external grid voltage through the power adapter, for example, the external grid voltage (i.e., the mains voltage) is generally 220V, and the first voltage is a 24V adapted voltage obtained by converting the 220V external grid voltage through the power adapter.
The battery management circuit 120 may be connected to the input port 110, and configured to be charged with a first voltage and output a second voltage. Wherein the first voltage and the second voltage have different voltage values.
The second voltage may be an output voltage of the battery 122, and the battery 122 is a backup battery 122 of the power supply circuit 100, and may be a lithium battery 122, a storage battery 122, or the like. Preferably, the battery 122 may be a lithium battery 122 pack. In the present embodiment, the second voltage may be 12V.
The output port 130 may be configured to connect an external device. The external device may receive the first voltage or the second voltage as an operating voltage to perform an operation. The external device can accept a wide range of operating voltages, so in this embodiment, it is not necessary to boost or buck the first voltage or the second voltage, and the first voltage or the second voltage can be directly used as the operating voltage of the external device.
The external device may be a brushless motor, a brush motor, or other devices, which are not listed here.
The patching circuit 140 may connect the input port 110, the battery management circuit 120, and the output port 130, and is configured to select the first voltage or the second voltage to power the external device.
The present embodiment provides a power supply circuit 100 including an input port 110 configured to input a first voltage. The battery management circuit 120 is connected to the input port 110, and is configured to be charged with a first voltage and output a second voltage. An output port 130 configured to connect an external device. The switching circuit 140, connected to the input port 110, the battery management circuit 120 and the output port 130, is configured to select the first voltage or the second voltage to power the external device. Wherein the first voltage and the second voltage have different voltage values. The power supply circuit 100 can select different power supply modes to achieve optimal efficiency and high reliability. The voltage-reducing circuit is suitable for various working voltages, voltage reduction or voltage boosting processing of output voltage is not needed, and energy loss is reduced.
Further, referring to fig. 2, the battery management circuit 120 may further include a charging and discharging circuit 121 and a battery 122.
The switching circuit 140 may be connected to the input port 110, the output port 130, and the battery 122, respectively, and the charging and discharging circuit 121 may be connected to the input port 110 and the battery 122, respectively.
The charging and discharging circuit 121 may be configured to charge the battery 122 with a first voltage, and the battery 122 may be configured to output a second voltage to the adaptor circuit 140.
Referring to fig. 1, fig. 2 and fig. 3, fig. 3 is a schematic circuit structure diagram of a first embodiment of a power supply circuit provided in the present application. The switching circuit 140 includes: the first diode D202, the positive pole of the first diode D202 is connected to the input port 110(CN201), the negative pole of the first diode D202 is connected to the output port 130(CN202), the input port 110(CN201) is connected to the input terminal of the charging and discharging circuit 121 of the battery management circuit 120(CN203), and the output terminal of the battery 122 of the battery management circuit 120(CN203) is connected to the output port 130(CN 202).
The working principle is as follows: when the input port 110(CN201) has the first voltage input, the first voltage passes through the first diode D202, and thus supplies power to the external device. Meanwhile, the first voltage charges the battery 122 through the charge and discharge circuit 121 of the battery management circuit 120(CN 203). When the input port 110(CN201) has no first voltage input, the battery 122 of the battery management circuit 120(CN203) outputs a second voltage to power the external device.
Referring to fig. 1, fig. 2 and fig. 4, fig. 4 is a schematic circuit structure diagram of a second embodiment of the power supply circuit provided in the present application. Among them, the switching circuit 140 may include: the circuit comprises a second diode D092, a third diode D201, a first resistor R204 and a first switch Q201.
The anode of the second diode D092 may be connected to the input port 110(CN091), and the cathode of the second diode D092 may be connected to the output port 130. An anode of the third diode D201 may be connected to the output terminal of the battery 122, and a cathode of the third diode D201 may be connected to the output port 130. A first end of the first resistor R204 may be connected to the output port 130. The control terminal G of the first switch Q201 is connected to the input port 110(CN091), the first terminal D of the first switch Q201 is connected to the second terminal of the first resistor R204, and the second terminal S of the first switch Q201 is grounded. The first end D of the first switch Q201 may further input a control signal OTG, where the control signal OTG is used to control the charging and discharging circuit 121 to perform charging and discharging switching. Alternatively, the first switch Q201 may be a triode.
The patching circuit 140 also includes the following electronic components:
a second resistor R203, wherein a first end of the second resistor R203 is connected to the input port 110(CN 091).
A first end of the third resistor R202 is connected to the second end of the second resistor R203, and a second end of the third resistor R202 is connected to the control end G of the first switch Q201.
And a first end of the fourth resistor R201 is connected to the second end of the second resistor R203, and a second end of the fourth resistor R201 is grounded.
Specifically, when the input port 110(CN091) receives the first voltage, the switching circuit 140 receives the first voltage, and the first voltage supplies power to the charging and discharging circuit 121 through the second diode D092, so as to charge the battery 122. On the other hand, the first voltage directly supplies power to the external equipment, and then drives the external equipment to work.
Meanwhile, the first voltage received by the switching circuit 140 is divided by the second resistor R203 and then input to the control terminal G of the first switch Q201, so that the first switch Q201 is turned on, at this time, the second terminal S of the first switch Q201 is grounded, and the control signal OTG input to the first terminal D of the first switch Q201 controls the charging and discharging circuit 121 to be in the charging mode.
When the input port 110(CN091) has no input of the first voltage or the input of the first voltage is suddenly disconnected, the voltage of the control terminal G of the first switch Q201 is 0, the first switch Q201 is turned off, and at this time, the control signal OTG input to the first terminal D of the first switch Q201 controls the charging and discharging circuit 121 to be in the reverse boost discharging mode. At this time, the output voltage of the output port 130 gradually decreases, and when the output voltage of the output port 130 decreases to be lower than the output voltage VBAT _ OUT of the output terminal of the battery 122, the second voltage VBAT _ OUT is output from the output terminal of the battery 122 to temporarily supply power to the external device. When the voltage of the charge and discharge circuit 121 in reverse boost discharge rises to a target voltage, for example, the target voltage is 24V, and the voltage value of the target voltage is higher than the output voltage VBAT _ OUT of the battery 122, the target voltage is switched to the boosted voltage to supply power to the external device. The third diode D201 can prevent the input voltage, i.e., the first voltage, from being directly applied to both ends of the battery 122, and thus, the battery 122 is protected.
The working principle is as follows: in this embodiment, when the input port 110(CN091) has the first voltage input, the first voltage received by the switching circuit 140 supplies power to the external device on the one hand, and charges the battery 122 through the battery management circuit 120 on the other hand. When the first voltage is removed, the output voltage of the output port 130 gradually decreases, and when the output voltage of the output port 130 is lower than the output voltage VBAT _ OUT of the battery 122, the external device is temporarily powered by the output voltage VBAT _ OUT of the battery 122. At this time, the control signal OTG input to the first end D of the first switch Q201 controls the charge and discharge circuit 121 to be in the reverse boost discharge mode, and when the voltage of the charge and discharge circuit 121 in the reverse boost discharge mode rises to the target voltage, that is, the target voltage is higher than the output voltage VBAT _ OUT output from the battery 122 end, the target voltage after the boost is switched to supply power to the external device. Through the mode, the normal work of the external equipment cannot be influenced by the plugging of the power adapter, and the stable power supply voltage can be basically guaranteed to be provided for the external equipment.
Referring to fig. 1, fig. 2 and fig. 5, fig. 5 is a schematic circuit structure diagram of a third embodiment of the power supply circuit provided in the present application. The through circuit 140 may include a fourth diode D092, a fifth diode D204, a sixth diode D207, and a first switch circuit.
The anode of the fourth diode D092 is connected to the input port 110(CN091), the anode of the fifth diode D204 is connected to the output terminal VBAT _ OUT of the battery 122, the anode of the sixth diode D207 is connected to the cathode of the fifth diode D204, and the output terminal of the sixth diode D207 is connected to the cathode of the fourth diode D092. The first terminal of the first switch circuit is connected to the anode of the sixth diode D207, the second terminal of the first switch circuit is connected to the cathode of the sixth diode D207, and the control terminal of the first switch circuit is configured to be turned on or off according to the electrical signal input from the input port 110(CN 091).
Optionally, the first switching circuit comprises: a second switch Q202, a third switch Q204, and a fourth switch Q201.
The first end E of the second switch Q202 is grounded, the second end C of the second switch Q202 is connected to the cathode of the sixth diode D207 through the fifth resistor R2012, and the control end B of the second switch Q202 is connected to the input port 110(CN 091). The first terminal E of the third switch Q204 is connected to ground, and the control terminal B of the third switch Q204 is connected to the second terminal C of the second switch Q202. The second switch Q202 and the third switch Q204 may be transistors. A first terminal Bot _ OUT of the fourth switch Q201 is connected to the anode of the sixth diode D207, a second terminal of the fourth switch Q201 is connected to the cathode of the sixth diode D207, and a control terminal of the fourth switch Q201 is connected to the second terminal C of the third switch Q204. The fourth switch Q201 may be a PMOS transistor, a drain of the PMOS transistor is connected to the output end of the fifth diode D204, and a source of the PMOS transistor is connected to the output end of the sixth diode D207.
The first switching circuit further includes:
a sixth resistor R2010, a first end of the sixth resistor R2010 is connected to the input port 110(CN091), and a second end of the sixth resistor R2010 is connected to the control end B of the second switch Q202.
A first end of the seventh resistor R2011 is connected to the second end of the sixth resistor R2010, and a second end of the seventh resistor R2011 is grounded.
A first end of the eighth resistor R205 is connected to the second end C of the second switch Q202, and a second end of the eighth resistor R205 is connected to the control end G of the third switch Q204.
A ninth resistor R2013, a first end of the ninth resistor R2013 is connected to the second end of the eighth resistor R205, and a second end of the ninth resistor R2013 is grounded.
And a first end of the tenth resistor R202 is connected with the control end of the fourth switch Q201.
A first end of the eleventh resistor R201 is connected to the output port 130, and a second end of the eleventh resistor R201 is connected to a second end of the tenth resistor R202.
And a first end of the twelfth resistor R203 is connected to the second end of the tenth resistor R202, and a second end of the twelfth resistor R203 is connected to the second end C of the third switch Q204.
Specifically, as shown in fig. 5, when the input port 110(CN091) has the first voltage input, the first voltage received by the switching circuit 140 supplies power to the charging and discharging circuit 121 after passing through the fourth diode D092, so as to charge the battery 122, and simultaneously supplies power to the external device to drive the external device to operate. When the input port 110(CN091) receives no first voltage, the output voltage of the output port 130 gradually decreases, and when the output voltage is lower than the output voltage VBAT _ OUT of the battery 122, the output terminal of the battery 122 outputs the voltage VBAT _ OUT, the output voltage VBAT _ OUT enters the control terminal B of the third switch Q204 through the fifth diode D204, the sixth diode D207, the fifth resistor R2012 and the eighth resistor R205, the third switch Q204 is turned on, the output voltage passing through the third switch Q204 is divided through the eleventh resistor R201 and the twelfth resistor R203, so that the control terminal and the second terminal of the fourth switch Q201 generate a conducting voltage difference, the fourth switch Q201 is turned on, and the current of the output voltage VBAT _ OUT of the output terminal of the battery 122 is output through the fifth diode D204 and the fourth switch Q201 to supply power to the external device.
The working principle is as follows: when the first voltage is input to the input port 110(CN091), the electrical signal PVDD input to the input port 110(CN091) is at a high level, the second switch Q202 is turned on, the control terminal B of the third switch Q204 is grounded, the third switch Q204 is turned off, the voltages of the control terminal and the second terminal of the fourth switch Q201 are equal, and the third switch Q201 is turned off. At this time, the first voltage output passes through the switching circuit 140, and after the switching circuit 140 performs load balancing processing on the first voltage, the voltage value is not attenuated, and the original voltage value is maintained and then output, so as to supply power to the external device.
When the input port 110(CN091) has no first voltage input, the external device is powered in response to the second voltage output from the output terminal of the battery 122. Specifically, the electrical signal PVDD input by the input port 110(CN091) is at a low level, the second switch Q202 is not turned on, the second voltage enters the control electrode B of the third switch Q204 through the fifth diode D204, the sixth diode D207, the fifth resistor R2012 and the eighth resistor R205, the third switch Q204 is turned on, the output voltage passing through the third switch Q204 is divided by the eleventh resistor R201 and the twelfth resistor R203, so that the control electrode of the fourth switch Q201 and the second terminal voltage are not equal, the fourth switch Q201 is turned on, and the current of the output voltage VBAT _ OUT at the output end of the battery 122 is output through the fifth diode D204 and the fourth switch Q201, thereby reducing the loss.
Referring to fig. 1, fig. 2 and fig. 6, fig. 6 is a schematic circuit structure diagram of a fourth embodiment of the power supply circuit provided in the present application. Among them, the switching circuit 140 may include: a fifth switch Q093, a sixth switch Q096, a capacitor C092, and a seventh switch Q095. The control terminal B of the fifth switch Q093 is connected to the input port 110(CN091), the first terminal E of the fifth switch Q093 is grounded, and the second terminal C of the fifth switch Q093 is connected to the power LDO through the thirteenth resistor R095. The control terminal B of the sixth switch Q096 is connected to the input port 110(CN091), the first terminal E of the sixth switch Q096 is grounded, and the second terminal C of the sixth switch Q096 is connected to the power LDO through the fourteenth resistor R098. A first terminal of the capacitor C092 is connected to a second terminal C of the sixth switch Q096. A control terminal B of the seventh switch Q095 is connected to the second terminal of the capacitor C092, a first terminal E of the seventh switch Q095 is grounded, and a second terminal C of the seventh switch Q095 is connected to the power LDO through a fifteenth resistor R096.
The second end C of the seventh switch Q095 is further connected to an enable end EN of the charge and discharge circuit 121, and the enable end EN is configured to receive an enable signal to control the operation of the charge and discharge circuit 121.
Optionally, the switching circuit 140 may further include:
a first terminal of the sixteenth resistor R093 and a first terminal of the sixteenth resistor R093 are connected to the input port 110(CN091), and a second terminal of the sixteenth resistor R093 is connected to the control terminal B of the fifth switch Q093.
A seventeenth resistor R094, a first end of the seventeenth resistor R094 is connected to the control end B of the fifth switch Q093, and a second end of the seventeenth resistor R094 is grounded.
The eighteenth resistor R097, a first end of the eighteenth resistor R097 is connected to the second end of the capacitor C092, and a second end of the eighteenth resistor R097 is grounded.
Specifically, when the input port 110(CN091) has the first voltage input, the through circuit 140 receives the first voltage, and the first voltage supplies power to the charging and discharging circuit 121 after passing through the fourth diode D092, so as to charge the battery 122. While the first voltage powers the external device. That is, the first voltage supplies power to the battery management circuit 120, and then charges the battery 122, and supplies power to the external device, and then drives the external device to operate.
The second end C of the fifth switch Q093 further inputs a control signal OTG for controlling the charging and discharging circuit 121 to perform charging and discharging switching. When the first voltage is input to the power supply circuit 100, the input first voltage is divided by the sixteenth resistor R093 and then input to the control end B of the fifth switch Q093, so that the fifth switch Q093 is turned on, and then the control signal OTG for controlling the charge and discharge circuit 121 to perform charge and discharge switching is grounded, and the control signal OTG controls the charge and discharge circuit 121 to be in the charging mode.
Meanwhile, the first voltage passes through the control terminal B of the sixth switch Q096, so that the sixth switch Q096 is turned on, and thus the capacitor C092 connected to the second terminal C of the sixth switch Q096 is grounded, the control terminal B of the seventh switch Q095 connected to the second terminal C of the capacitor C092 has no current flowing therethrough, the seventh switch Q095 is turned off, and finally the enable terminal EN of the charge and discharge circuit 121 connected to the second terminal C of the seventh switch Q095 receives an enable signal, so as to control the charge and discharge circuit 121 to perform normal charge and discharge operations.
When the power supply circuit 100 has no first voltage input, for example, when the external power supply is removed, the input voltage at the control terminal B of the fifth switch Q093 is 0, and the fifth switch Q093 is turned off, so as to cause the charging and discharging switching control signal OTG for controlling the charging and discharging circuit 121 to perform charging and discharging switching, and control the charging and discharging circuit 121 to be in the reverse boost discharging mode. Meanwhile, the first end of the capacitor C092 is pulled up to the LDO power supply voltage from 0V, and in the voltage rising process, the capacitor C092 is charged, the second end of the capacitor C092, the control end B of the seventh switch Q095, and the enable end EN of the charging and discharging circuit 121 connected to the second end C of the seventh switch Q095 have current passing through, the seventh switch Q095 is turned on, and the enable end EN of the charging and discharging circuit 121 receives an enable signal to control the charging and discharging circuit 121 not to work. When the voltage at the first end of the capacitor C092 is pulled up from 0V to the LDO power voltage, and the capacitor C092 is fully charged, the second end of the capacitor C092, the control end B of the seventh switch Q095, and the enable end EN of the charge and discharge circuit 121 connected to the second end C of the seventh switch Q095 have no current passing through, the seventh switch Q095 is turned off, and the enable end EN of the charge and discharge circuit 121 receives an enable signal to control the charge and discharge circuit 121 to perform normal charge and discharge operations. At this time, since there is no input of the first voltage, the fifth switch Q093 is in an off state, and thus the control signal OTG for controlling the charging and discharging switching of the charging and discharging circuit 121 is caused, the charging and discharging circuit 121 is controlled to be in a reverse voltage boosting discharging mode, the voltage of the output port 130 quickly reaches the target voltage, and a stable working voltage is provided to the external device. By the mode, the normal work of the external equipment cannot be influenced by the plugging of the external power supply, and a stable power supply voltage can be provided for the external equipment.
Based on the above power supply circuit 100, the present application also provides a household appliance 200. Referring to fig. 7, fig. 7 is a schematic structural diagram of an embodiment of a household appliance provided in the present application. As shown in fig. 7, the household appliance 200 may include the power supply circuit 100 described above. The home appliance 200 may include an electric fan, a table lamp, and other home appliances.
In summary, the power supply circuit 100 provided in the present application includes an input port 110 configured to input a first voltage. The battery management circuit 120 is connected to the input port 110, and is configured to be charged with a first voltage and output a second voltage. An output port 130 configured to connect an external device. The switching circuit 140, connected to the input port 110, the battery management circuit 120 and the output port 130, is configured to select the first voltage or the second voltage to power the external device. Wherein the first voltage and the second voltage have different voltage values. The power supply circuit 100 can select different power supply modes to achieve optimal efficiency and high reliability. The voltage-reducing circuit is suitable for various working voltages, voltage reduction or voltage boosting processing of output voltage is not needed, and energy loss is reduced.
It is to be understood that the particulars described herein are by way of illustration and not by way of limitation. In addition, for convenience of description, only a part of structures related to the present application, not all of the structures, are shown in the drawings. All others that would be obvious to one of ordinary skill in the art based on this disclosure, without any creative effort, are within the scope of this disclosure.
The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "a" or "an" means that a particular feature, structure, or characteristic described in connection with the application may be included in at least one of the applications. The appearances of the phrase in various places in the specification are not necessarily all referring to the same, nor are separate or alternative meanings mutually exclusive of others. Those skilled in the art will explicitly and implicitly appreciate that what is described herein may be combined with others.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.
Claims (11)
1. A power supply circuit, characterized in that the power supply circuit comprises:
an input port configured to input a first voltage;
a battery management circuit connected to the input port, configured to be charged with the first voltage, and output a second voltage;
an output port configured to connect an external device;
a switching circuit connected to the input port, the battery management circuit and the output port, and configured to select the first voltage or the second voltage to power the external device;
wherein the first voltage and the second voltage have different voltage values.
2. The power supply circuit of claim 1,
the battery management circuit includes:
the charging and discharging circuit is connected with the input port;
the battery is connected with the charging and discharging circuit and the switching circuit;
wherein the charging and discharging circuit is configured to charge the battery with the first voltage, and the battery is configured to output a second voltage to the transfer circuit.
3. The power supply circuit of claim 2,
the transfer circuit includes:
the anode of the first diode is connected with the input port, and the cathode of the first diode is connected with the output port;
the input port is connected with the input end of the charge and discharge circuit;
the output end of the battery is connected with the output port.
4. The power supply circuit of claim 2,
the transfer circuit includes:
the anode of the second diode is connected with the input port, and the cathode of the second diode is connected with the output port;
the anode of the third diode is connected with the output end of the battery, and the cathode of the third diode is connected with the output port;
a first end of the first resistor is connected with the output port;
a control end of the first switch is connected with the input port, a first end of the first switch is connected with a second end of the first resistor, and a second end of the first switch is grounded;
and the first end of the first switch is also used for inputting a control signal, and the control signal is used for controlling the charge and discharge circuit to carry out charge and discharge switching.
5. The power supply circuit of claim 4,
the switching circuit further includes:
a first end of the second resistor is connected with the input port;
a first end of the third resistor is connected with a second end of the second resistor, and a second end of the third resistor is connected with a grid electrode of the first switching tube;
and a first end of the fourth resistor is connected with the second end of the second resistor, and a second end of the fourth resistor is grounded.
6. The power supply circuit of claim 2,
the transfer circuit includes:
a fourth diode, an anode of the fourth diode being connected to the input port;
the anode of the fifth diode is connected with the output end of the battery;
the anode of the sixth diode is connected with the cathode of the fifth diode, and the output end of the sixth diode is connected with the cathode of the fourth diode;
a first terminal of the first switch circuit is connected to the anode of the sixth diode, a second terminal of the first switch circuit is connected to the cathode of the sixth diode, and a control terminal of the first switch circuit is configured to be turned on or off according to an electrical signal input from the input port.
7. The power supply circuit of claim 6,
the first switching circuit includes:
a first end of the second switch is grounded, a second end of the second switch is connected with a cathode of the sixth diode through a fifth resistor, and a control end of the second switch is connected with the input port;
a first end of the third switch is grounded, and a control end of the third switch is connected with a second end of the second switch;
a first end of the fourth switch is connected to the anode of the sixth diode, a second end of the fourth switch is connected to the cathode of the sixth diode, and a control end of the fourth switch is connected to the second end of the third switch.
8. The power supply circuit of claim 7,
the first switching circuit further includes:
a first end of the sixth resistor is connected with the input port, and a second end of the sixth resistor is connected with the control end of the second switch;
a first end of the seventh resistor is connected with a second end of the sixth resistor, and a second end of the seventh resistor is grounded;
a first end of the eighth resistor is connected with the second end of the second switch, and a second end of the eighth resistor is connected with the control end of the third switch;
a ninth resistor, a first end of the ninth resistor being connected to a second end of the eighth resistor, a second end of the ninth resistor being grounded;
a tenth resistor, a first end of the tenth resistor being connected to the control end of the fourth switch;
a first end of the eleventh resistor is connected with the output port, and a second end of the eleventh resistor is connected with a second end of the tenth resistor;
a twelfth resistor, a first end of the twelfth resistor being connected to a second end of the tenth resistor, and a second end of the twelfth resistor being connected to a second end of the third switch.
9. The power supply circuit of claim 2,
the transfer circuit includes:
a control end of the fifth switch is connected with the input port, a first end of the fifth switch is grounded, and a second end of the fifth switch is connected with a power supply through a thirteenth resistor;
a control end of the sixth switch is connected with the input port, a first end of the sixth switch is grounded, and a second end of the sixth switch is connected with the power supply through a fourteenth resistor;
a first end of the capacitor is connected with a second end of the sixth switch;
a control end of the seventh switch is connected with the second end of the capacitor, a first end of the seventh switch is grounded, and a second end of the seventh switch is connected with the power supply through a fifteenth resistor;
the second end of the seventh switch is further connected to an enable end of the charge and discharge circuit, and the enable end is used for receiving an enable signal to control the operation of the charge and discharge circuit.
10. The power supply circuit of claim 9,
the switching circuit further includes:
a sixteenth resistor, wherein a first end of the sixteenth resistor is connected to the input port, and a second end of the sixteenth resistor is connected to the control end of the fifth switch;
a seventeenth resistor, wherein a first end of the seventeenth resistor is connected to the control end of the fifth switch, and a second end of the seventeenth resistor is grounded;
and the first end of the eighteenth resistor is connected with the second end of the capacitor, and the second end of the eighteenth resistor is grounded.
11. A household appliance, characterized in that it comprises a supply circuit according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021883537.4U CN213125615U (en) | 2020-09-01 | 2020-09-01 | Power supply circuit and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021883537.4U CN213125615U (en) | 2020-09-01 | 2020-09-01 | Power supply circuit and household appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213125615U true CN213125615U (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021883537.4U Active CN213125615U (en) | 2020-09-01 | 2020-09-01 | Power supply circuit and household appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213125615U (en) |
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