Power supply control circuit, control method of power supply control circuit and electronic device

Abstract

The invention discloses a power supply control circuit, a control method of the power supply control circuit and an electronic device, the power supply control circuit comprises a first power supply circuit, the first power supply circuit comprises a power supply, and a first output end of the power supply is used for being connected with electric equipment and outputting a first voltage to the electric equipment under control; a second output end of the second power supply circuit is connected with the electric equipment, an input end of the second power supply circuit is connected with an external power supply, and the second power supply circuit is used for receiving the external voltage and converting the external voltage into a second voltage under control; the controller is connected with the first power supply circuit and the second power supply circuit, and the controller is provided with a voltage threshold value. When the first voltage output by the first power supply circuit is larger than or equal to the voltage threshold value, the first power supply circuit is controlled to supply power to the electric equipment, otherwise, the second power supply circuit is controlled to convert the external voltage into the second voltage to replace power supply, and the electric equipment still operates reliably when the first power supply circuit cannot supply power.

Description

Technical Field

[0001] The present application relates to the technical field of power supply, and in particular, to a power control circuit, a control method of the power control circuit, and an electronic device. Background Art

[0002] At present, energy storage battery packs are widely used in various electrical equipment due to their high energy density, portability, and rapid response. An energy storage battery pack generally includes a battery module, an electrical system, a thermal management system, a housing, and a BMS (Battery Management System). The battery module includes a plurality of battery cells. In the case of under-voltage of a single battery cell or overall under-voltage, the energy storage battery pack or the electrical equipment enters a sleep state to reduce power consumption and protect the battery module.

[0003] When there is an external voltage on the energy storage battery pack or the electrical equipment, the external voltage will wake up the energy storage battery pack or the electrical equipment. However, when the external voltage or the energy storage battery pack does not meet the charging conditions, the energy storage battery pack will be repeatedly woken up and put into sleep until the power of the battery module is exhausted, causing irreversible damage to the battery module. Summary of the Invention

[0004] In view of the problems in the background art, the purpose of the present application is to provide a power control circuit, a control method of the power control circuit, and an electronic device. When the first voltage output by the first power supply circuit is greater than or equal to a voltage threshold, the controller controls the first power supply circuit to supply power to the electrical equipment. Otherwise, the controller controls the second power supply circuit to convert the external voltage into the first voltage to replace the power supply, so that the electrical equipment can still operate reliably when the first power supply circuit cannot supply power.

[0005] To achieve the above object, the present application provides a power control circuit for supplying power to an electrical equipment. The power control circuit includes: a first power supply circuit, the first power supply circuit includes a power supply, a first output terminal of the power supply is used to connect to the electrical equipment, and under control, output a first voltage to the electrical equipment; a second power supply circuit, a second output terminal of the second power supply circuit is connected to the electrical equipment, an input terminal of the second power supply circuit is connected to an external power supply, for receiving an external voltage, and under control, convert the received external voltage into a second voltage; a controller, respectively connected to the first power supply circuit and the second power supply circuit, the controller is provided with a voltage threshold, the controller is used to receive the first voltage; when the first voltage is greater than or equal to the voltage threshold, the controller controls the first power supply circuit to supply power to the electrical equipment; when the first voltage is less than the voltage threshold, the controller controls the second power supply circuit to convert the received external voltage into the second voltage.

[0006] Among them, the second power supply circuit includes a conversion circuit and a switch. The conversion circuit is connected to the external power supply and is used to receive the external voltage. The first end of the switch is connected to the conversion circuit, and the second end of the switch is connected to the electrical device. When the first voltage is greater than or equal to the voltage threshold, the controller controls the switch to disconnect and controls the first power supply circuit to output the first voltage to the electrical device.

[0007] Among them, the conversion circuit is further used to convert the external voltage into the second voltage. When the first voltage is less than the voltage threshold, the controller is further used to receive the second voltage. And when the second voltage is greater than or equal to the voltage threshold, the controller controls the switch to conduct and controls the second power supply circuit to output the second voltage to the electrical device. Among them, the second voltage is less than the external voltage.

[0008] Among them, when the first voltage is less than the voltage threshold and the second voltage is less than the voltage threshold, the controller controls the switch to disconnect and controls the first power supply circuit not to supply power to the electrical device, or controls the electrical device to be in a sleep state.

[0009] Among them, the first power supply circuit further includes a first diode. The positive electrode of the first diode is connected to the power supply, and the negative electrode of the first diode is connected to the electrical device.

[0010] Among them, the second power supply circuit further includes a second diode. The positive electrode of the second diode is connected to the second end of the switch, and the negative electrode of the second diode is connected to the electrical device.

[0011] Among them, the input end of the second power supply circuit is connected to a photovoltaic module or the mains.

[0012] To achieve the above object, the present application further provides a control method for a power supply control circuit, which is applied to the power supply control circuit as described above. The control method includes: the controller obtains the first voltage from the first power supply circuit; in response to the first voltage being greater than or equal to the voltage threshold, controls the first power supply circuit to output the first voltage to the electrical device; in response to the first voltage being less than the voltage threshold, controls the second power supply circuit to convert the received external voltage into the second voltage.

[0013] Wherein, the control method further includes: the controller obtains the second voltage from the second power supply circuit; in response to the first voltage being less than the voltage threshold and the second voltage being greater than or equal to the voltage threshold, controlling the second power supply circuit to output the second voltage to the electrical device; in response to the first voltage being less than the voltage threshold and the second voltage being less than the voltage threshold, controlling the first power supply circuit and the second power supply circuit not to supply power to the electrical device, or controlling the electrical device to be in a sleep state.

[0014] To achieve the above object, the present application further provides an electronic device, including the power supply control circuit as described above, and the electronic device is used to supply power to the electrical device.

[0015] In the power supply control circuit, the control method of the power supply control circuit, and the electronic device provided by the embodiments of the present application, when the first voltage output by the first power supply circuit is greater than or equal to the voltage threshold, the controller controls the first power supply circuit to supply power to the electrical device, which can protect the battery module and enable the electrical device to operate reliably. In addition, when the first voltage is less than the voltage threshold, the second power supply circuit converts the external voltage into the second voltage. When the second voltage is greater than or equal to the voltage threshold, the controller controls the second power supply circuit to output the second voltage to the electrical device, that is, controls the external voltage to supply power to the electrical device, replacing the power supply of the first power supply circuit, which can reduce the loss of the battery module and enable the electrical device to operate reliably. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic framework diagram of an embodiment of the power supply control circuit of the present application;

[0018] Figure 2 is a schematic framework diagram of another embodiment of the power supply control circuit of the present application;

[0019] Figure 3 is a schematic framework diagram of yet another embodiment of the power supply control circuit of the present application;

[0020] Figure 4 is a schematic circuit diagram of an embodiment of the power supply control circuit of the present application;

[0021] Figure 5 is a schematic circuit diagram of another embodiment of the power supply control circuit of the present application;

[0022] Figure 6 It is a schematic flowchart of an embodiment of the control method of the power control circuit of the present application;

[0023] Figure 7 It is a schematic framework diagram of an embodiment of the electronic device of the present application. Detailed implementation manners

[0024] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only partial embodiments of the present application rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0025] Referring to "embodiment" herein means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0026] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "set", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0027] In the description of the present application, the descriptions referring to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0028] As used herein, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship. Furthermore, "plurality" in this text means two or more than two. In addition, the term "at least one" in this text means any one of a plurality or any combination of at least two of a plurality. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set composed of A, B, and C.

[0029] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] When there is an external voltage in an existing energy storage battery pack or electrical device, the external voltage will wake up the energy storage battery pack or electrical device. However, when the external voltage or the energy storage battery pack does not meet the charging conditions, the energy storage battery pack will be repeatedly woken up and put into sleep until the power of the battery module is exhausted, causing irreversible damage to the battery module.

[0031] Based on the above problems, this application proposes a power control circuit. Please refer to Figure 1 as shown Figure 1 is a schematic framework diagram of an embodiment of the power control circuit of this application. The power control circuit 10 of this embodiment is used to supply power to an electrical device. The power control circuit 10 of this embodiment can be applied to a mobile power supply or an outdoor power supply.

[0032] As Figure 1 shown, the power control circuit 10 includes a first power supply circuit 11, a second power supply circuit 12, and a controller 13.

[0033] The first output terminal of the first power supply circuit 11 is used to connect to the electrical device 20 and output a first voltage to the electrical device 20 under the control of the controller 13.

[0034] The first power supply circuit 11 includes a power supply 103, and the power supply 103 can be an energy storage battery pack. The energy storage battery pack includes a battery module and a BMS. The battery module includes a plurality of battery cells. The battery module is used to store electrical energy, and the BMS is used to monitor the working information of the battery module and control the charging or discharging of the battery module according to the working information of the battery module.

[0035] The first voltage may be a platform voltage or an operating voltage of the power source 103. The platform voltage of the power source 103 is the output voltage value when the battery module is stably discharged. The operating voltage of the power source 103 is the output voltage value when the battery module is in an operating state.

[0036] The first voltage is the output voltage of the power supply 103 .

[0037] The second output terminal of the second power supply circuit 12 is connected to the power consumption device 20. The input terminal of the second power supply circuit 12 is connected to the external power supply 30 for receiving an external voltage and converting the received external voltage into a second voltage under the control of the controller 13.

[0038] The external power source 30 may be a photovoltaic module or a mains power supply. The input end of the second power supply circuit 12 is connected to the photovoltaic module or the mains power supply.

[0039] The input end of the second power supply circuit 12 is connected to the photovoltaic module, and the external voltage is the DC voltage output by the photovoltaic module. In this embodiment, the specifications and models of the photovoltaic module are not specifically limited and can be selected and set according to actual needs.

[0040] The input end of the second power supply circuit 12 is connected to the mains via a power converter, which is used to convert the AC voltage of the mains into a DC voltage, and the external voltage is the DC voltage output by the power converter. The power converter may be an AC / DC converter (Alternating current / Direct current).

[0041] The second power supply circuit 12 is used to receive an external voltage and convert the received external voltage into a second voltage, wherein the second voltage is lower than the external voltage.

[0042] The controller 13 is connected to the first power supply circuit 11 and the second power supply circuit 12 respectively. The controller 13 is provided with a voltage threshold, and the controller 13 is used to receive a first voltage. When the first voltage is greater than or equal to the voltage threshold, the controller 13 controls the first power supply circuit 11 to supply power to the power-consuming device 20. When the first voltage is less than the voltage threshold, the controller 13 controls the second power supply circuit 12 to convert the received external voltage into a second voltage.

[0043] The controller 13 may be a control chip built into the power control circuit 10 , or may be a control module of a BMS of the power supply 103 .

[0044] Among them, the voltage threshold can be set according to the actual usage scenario. For example, the voltage threshold can be a voltage value set by comprehensively considering the electrical device 20 and the first power supply circuit 11. When the voltage value received by the electrical device 20 is greater than or equal to the voltage threshold, the electrical device 20 is in the working state; when the voltage value received by the electrical device is less than the voltage threshold, the electrical device 20 is in the sleep state. When the first voltage output by the first power supply circuit 11 is greater than or equal to the voltage threshold, the power supply 103 is in a non-undervoltage state; when the first voltage output by the first power supply circuit 11 is less than the voltage threshold, the power supply 103 is in an undervoltage state.

[0045] When the first voltage output by the first power supply circuit 11 is greater than or equal to the voltage threshold, the controller 13 controls the first power supply circuit 11 to supply power to the electrical device 20. When the first voltage is less than the voltage threshold, the controller 13 controls the second power supply circuit 12 to convert the received external voltage into a second voltage.

[0046] The power supply control circuit 10 of this embodiment includes: a first power supply circuit 11, a second power supply circuit 12, and a controller 13. The first output terminal of the first power supply circuit 11 is used to connect to the electrical device 20 and output a first voltage to the electrical device 20 under control; the second output terminal of the second power supply circuit 12 is connected to the electrical device 20 and converts the received external voltage into a second voltage under control; the controller 13 is respectively connected to the first power supply circuit 11 and the second power supply circuit 12. The controller 13 is provided with a voltage threshold and is used to receive the first voltage. When the first voltage is greater than or equal to the voltage threshold, the controller 13 controls the first power supply circuit 11 to supply power to the electrical device 20. When the first voltage is less than the voltage threshold, the controller 13 controls the second power supply circuit to convert the received external voltage into a second voltage. In this application, when the first voltage output by the first power supply circuit 11 is greater than or equal to the voltage threshold, the first power supply circuit 11 is controlled to supply power to the electrical device 20. Otherwise, the second power supply circuit 12 is controlled to convert the external voltage into a second voltage to replace the power supply, so that the electrical device 20 can still operate reliably when the first power supply circuit 11 cannot supply power.

[0047] Please refer to Figure 2 as shown in Figure 2 is a schematic framework diagram of another embodiment of the power supply control circuit of this application. The power supply control circuit 10 of this embodiment includes a first power supply circuit 11, a second power supply circuit 12, and a controller 13. Among them, the first power supply circuit 11 includes a power supply 103 and a first diode 104, and the second power supply circuit 12 includes a conversion circuit 101 and a switch 102.

[0048] The first power supply circuit 11 includes a power source 103 and a first diode 104. The power source 103 is connected to the electrical device 20 through the first diode 104. The power source 103 is used to output a first voltage to the electrical device 20. The power source 103 includes a battery module and a BMS. The battery module is used to store electrical energy, and the BMS is used to monitor the operating information of the battery module and control the charging or discharging of the battery module according to the operating information of the battery module. The power source 103 can be a mobile power source or an outdoor power source and is used to supply power to the electrical device 20. Among them, the first diode 104 is used to achieve reverse power connection protection and protect the electrical device 20.

[0049] The second power supply circuit 12 includes a conversion circuit 101 and a switch 102. The conversion circuit 101 is used to receive an external voltage and convert the external voltage into a second voltage. The first end of the switch 102 is connected to the conversion circuit 101, and the second end of the switch 102 is connected to the electrical device 20.

[0050] Among them, the conversion circuit 101 includes a DC / DC converter, and the DC / DC converter is used to convert the external voltage into a first voltage. In this embodiment, the switch 102 is used to control the second power supply circuit 12 to supply power to the electrical device 20. When the switch 102 is turned on, the second power supply circuit 12 supplies power to the electrical device 20; when the switch 102 is turned off, the second power supply circuit 12 is disconnected. The switch 102 can be a relay, a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), a triode, or an optocoupler.

[0051] When the first voltage is greater than or equal to the voltage threshold, the controller 13 controls the switch 102 to turn off and controls the first power supply circuit 11 to output the first voltage to the electrical device 20, that is, controls the first power supply circuit 11 to supply power to the electrical device 20.

[0052] Among them, when the first voltage output by the power source 103 is greater than or equal to the voltage threshold, control the first power supply circuit 11 to supply power to the electrical device 20. The controller 13 controls the switch 102 to turn off, and the second power supply circuit 12 is disconnected, and the first power supply circuit 11 supplies power to the electrical device 20.

[0053] Further, when the first voltage is less than the voltage threshold, the controller 13 receives the second voltage, and when the second voltage is greater than or equal to the voltage threshold, the controller 13 controls the switch 102 to turn on and controls the second power supply circuit 12 to output the second voltage to the electrical device 20, that is, the second power supply circuit 12 supplies power to the electrical device 20.

[0054] When the first voltage is less than the voltage threshold and the second voltage is less than the voltage threshold, the controller 13 controls the switch 102 to disconnect, and controls the first power supply circuit 11 not to supply power to the electrical device 20, or controls the electrical device 20 to be in a sleep state.

[0055] Among them, when the first voltage output by the power supply 103 is less than the voltage threshold and the second voltage output by the conversion circuit 101 is less than the voltage threshold, the controller 13 controls the switch 102 to disconnect, and controls the first power supply circuit 11 not to supply power to the electrical device 20, or controls the electrical device 20 to be in a sleep state. If the electrical device still consumes power when it is in the sleep state, then control the first power supply circuit 11 to supply power to the electrical device 20.

[0056] In this embodiment, by controlling the conduction or disconnection of the switch 102, it is controlled whether the first power supply circuit 11 supplies power to the electrical device 20. When the switch 102 is conducting, the conversion circuit 101 is connected to the electrical device through the switch 102, and the second power supply circuit 12 supplies power to the electrical device 20; when the switch 102 is disconnected, the conversion circuit 101 is disconnected, and the first power supply circuit 11 supplies power to the electrical device 20. When the first voltage is less than the voltage threshold, the conversion circuit 101 of the second power supply circuit 12 converts the external voltage into a second voltage, and when the second voltage is greater than or equal to the voltage threshold, then control the switch 102 to conduct, control the second power supply circuit 12 to output the second voltage to the electrical device 20, that is, control the external voltage to supply power to the electrical device 20, replacing the power supply of the first power supply circuit 11, which can reduce the loss of the battery module and make the electrical device 20 operate reliably.

[0057] Please refer to Figure 3 as shown in Figure 3 which is a schematic framework diagram of another embodiment of the power supply control circuit of the present application. The power supply control circuit 10 of this embodiment includes a first power supply circuit 11, a second power supply circuit 12 and a controller 13. Among them, the first power supply circuit 11 includes a power supply 103 and a first diode 104, and the second power supply circuit 12 includes a conversion circuit 101, a switch 102 and a second diode 105.

[0058] Different from Figure 2 the embodiment, the second power supply circuit 12 of this embodiment further includes a second diode 105. The positive electrode of the second diode 105 is connected to the second end of the switch 102, and the negative electrode of the second diode 105 is connected to the electrical device 20.

[0059] Among them, the second diode 105 is used to achieve power reverse connection protection and protect the electrical device 20.

[0060] Please refer to Figure 4 as shown in Figure 4It is a circuit schematic diagram of an embodiment of the power control circuit of the present application. The power control circuit 10 of this embodiment includes a controller 13, a conversion circuit 101, a switch 102, a power supply 103, and a first diode 104.

[0061] The conversion circuit 101 receives an external voltage U0, and the conversion circuit 101 is connected to the electrical device 20 through the switch 102. The power supply 103 is connected to the electrical device 20 through the first diode 104. The controller 13 is connected to the conversion circuit 101 and the power supply 103 for receiving a first voltage and a second voltage. The controller 13 is provided with a voltage threshold, and the controller 13 is connected to the switch 102 for controlling the switch 102 to conduct or disconnect.

[0062] When the first voltage is greater than or equal to the voltage threshold, the controller 13 controls the switch 102 to disconnect, and the power supply 103 supplies power to the electrical device 20.

[0063] When the first voltage is less than the voltage threshold, the controller receives the second voltage, and when the second voltage is greater than or equal to the voltage threshold, the controller 13 controls the switch 102 to conduct and controls the external voltage U0 to supply power to the electrical device 20 through the conversion circuit 101.

[0064] When the first voltage is less than the voltage threshold and the second voltage is less than the voltage threshold, the controller 13 controls the switch 102 to disconnect and controls the first power supply circuit 11 and the second power supply circuit 12 not to supply power to the electrical device 20, or controls the electrical device 20 to be in a sleep state.

[0065] Among them, the switch 102 can be a relay, a MOSFET, a triode, or an optocoupler.

[0066] Taking the switch 102 as a relay as an example, the relay includes an open state and a closed state. The relay can be a normally open relay or a normally closed relay. The normally open relay is in an open state when the coil is not energized. The normally closed relay is in a closed state when the coil is not energized. Whether to energize the coil is controlled by the controller 13, thereby controlling the open state or the closed state of the relay. When the relay is in an open state, the conversion circuit 101 supplies power to the electrical device 20; when the relay is in a closed state, the conversion circuit 101 is disconnected.

[0067] Taking the switch 102 as a MOSFET as an example, the controller 13 controls the conduction or cut-off of the MOSFET. When the MOSFET is conducting, the conversion circuit 101 supplies power to the electrical device 20; when the MOSFET is cut off, the conversion circuit 101 is disconnected.

[0068] Taking the switch 102 as a triode as an example, the controller 13 controls the conduction or cut-off of the triode. When the triode is conducting, the conversion circuit 101 supplies power to the electrical device 20; when the triode is cut off, the conversion circuit 101 is disconnected.

[0069] Taking the switch 102 as an optocoupler as an example, the optocoupler includes a light-emitting element and a light-receiving element. The controller 13 controls the current flowing through the light-emitting element to control the light-emitting element to emit light. The light intensity depends on the magnitude of the current. The light irradiates the light-receiving element, and an output voltage is generated in the light-receiving element due to the photoelectric effect. The controller 13 controls whether the light-emitting element emits light, and thus controls whether the optocoupler has an output voltage. When the optocoupler has a voltage output, the conversion circuit 101 supplies power to the electrical device 20; when the optocoupler has no voltage output, the conversion circuit 101 is disconnected.

[0070] The switch 102 in this embodiment can be a relay, MOSFET, triode or optocoupler. The controller 13 controls the conduction or disconnection of the switch 102 to control whether the power supply 103 supplies power to the electrical device 20. When the first voltage is greater than or equal to the voltage threshold, the controller 13 controls the switch 102 to be disconnected, and the power supply 103 supplies power to the electrical device 20. When the first voltage is less than the voltage threshold, the controller 13 controls the switch 102 to conduct, and the conversion circuit 101 converts the external voltage into a second voltage. The controller 13 receives the second voltage. When the second voltage is greater than or equal to the voltage threshold, the controller 13 controls the external voltage U0 to supply power to the electrical device 20 through the conversion circuit 101, replacing the power supply of the first power supply circuit, which can reduce the loss of the battery module and enable the reliable operation of the electrical device 20.

[0071] Please refer to Figure 5 as shown in Figure 5 is a schematic circuit diagram of another embodiment of the power supply control circuit of the present application. The power supply control circuit 10 of this embodiment includes a controller 13, a conversion circuit 101, a switch 102, a first diode 104, a power supply 103 and a second diode 105.

[0072] Different from Figure 4 the embodiment in

[0073] Please refer to Figure 6 as shown in Figure 6 is a schematic flowchart of an embodiment of the control method of the power supply control circuit of the present application. The control method of the power supply control circuit of this embodiment includes the following steps:

[0074] S101: The controller obtains a first voltage from a first power supply circuit.

[0075] Wherein, the first voltage is the output voltage of the first power supply circuit. The first voltage is the output voltage of the first power supply circuit, and the first power supply circuit includes a power source that outputs the first voltage to the electrical device.

[0076] S102: In response to the first voltage being greater than or equal to a voltage threshold, control the first power supply circuit to output the first voltage to the electrical device.

[0077] Wherein, the controller is set with a voltage threshold, and the voltage threshold can be set according to the actual usage scenario. When the first voltage output by the power source is greater than or equal to the voltage threshold, control the first power supply circuit to output the first voltage to the electrical device, that is, control the power source to supply power to the electrical device.

[0078] S103: In response to the first voltage being less than the voltage threshold, control the second power supply circuit to convert the received external voltage into a second voltage.

[0079] Wherein, the second power supply circuit receives the external voltage and converts the external voltage into a second voltage.

[0080] S104: The controller obtains the second voltage from the second power supply circuit.

[0081] S105: In response to the first voltage being less than the voltage threshold and the second voltage being greater than or equal to the voltage threshold, control the second power supply circuit to output the second voltage to the electrical device.

[0082] Wherein, when the first voltage is less than the voltage threshold, the power source is in an undervoltage state. When the first voltage is less than the voltage threshold and the second voltage is greater than or equal to the voltage threshold, control the second power supply circuit to output the second voltage to the electrical device, that is, supply power to the electrical device by the external voltage.

[0083] S106: In response to the first voltage being less than the voltage threshold and the second voltage being less than the voltage threshold, control neither the first power supply circuit nor the second power supply circuit to supply power to the electrical device, or control the electrical device to be in a sleep state.

[0084] When the second voltage output by the second power supply circuit is less than the voltage threshold and the first voltage output by the first power supply circuit is less than the voltage threshold, control neither the first power supply circuit nor the second power supply circuit to supply power to the electrical device, or control the electrical device to be in a sleep state. If the electrical device still consumes power when in the sleep state, control the first power supply circuit to supply power to the electrical device.

[0085] The control method of the power control circuit in this embodiment controls the first power supply circuit to supply power to the electrical device in response to the first voltage output by the power supply being greater than or equal to the voltage threshold, that is, controls the power supply to supply power to the electrical device; when the first voltage is less than the voltage threshold, the second power supply circuit converts the external voltage into a second voltage, and when the second voltage is greater than or equal to the voltage threshold, controls the second power supply circuit to output the second voltage to the electrical device, that is, controls the external voltage to supply power to the electrical device, replacing the power supply of the first power supply circuit, which can reduce the loss of the battery module and enable the electrical device to operate reliably.

[0086] Please refer to Figure 7 as shown in Figure 7 is a schematic framework diagram of an embodiment of the electronic device of the present application. The electronic device 70 in this embodiment includes a power control circuit 10, and the electronic device 70 is used to supply power to the electrical device 20.

[0087] The above-described embodiments do not constitute a limitation on the protection scope of the technical solution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the above embodiments are included in the protection scope of the technical solution.

Claims

1. A power control circuit, characterized in that, For powering an electrical device, the power supply control circuit includes: A first power supply circuit, the first power supply circuit includes a power supply, a first output terminal of the power supply is used to connect to the electrical device, and under control, outputs a first voltage to the electrical device; A second power supply circuit, a second output terminal of the second power supply circuit is connected to the electrical device, an input terminal of the second power supply circuit is connected to an external power supply, is used to receive an external voltage, and under control, converts the received external voltage into a second voltage; A controller, respectively connected to the first power supply circuit and the second power supply circuit, the controller is provided with a voltage threshold, the controller is used to receive the first voltage; when the first voltage is greater than or equal to the voltage threshold, the controller controls the first power supply circuit to supply power to the electrical device; when the first voltage is less than the voltage threshold, the controller controls the second power supply circuit to convert the received external voltage into the second voltage.

2. The power control circuit according to claim 1, characterized in that, The second power supply circuit includes a conversion circuit and a switch, the conversion circuit is connected to the external power supply, is used to receive the external voltage, a first end of the switch is connected to the conversion circuit, and a second end of the switch is connected to the electrical device; When the first voltage is greater than or equal to the voltage threshold, the controller controls the switch to disconnect, and controls the first power supply circuit to output the first voltage to the electrical device.

3. The power control circuit according to claim 2, characterized in that, The conversion circuit is further used to convert the external voltage into the second voltage, when the first voltage is less than the voltage threshold, the controller is further used to receive the second voltage, and when the second voltage is greater than or equal to the voltage threshold, the controller controls the switch to conduct, and controls the second power supply circuit to output the second voltage to the electrical device; Wherein, the second voltage is less than the external voltage.

4. The power control circuit according to claim 3, characterized in that, When the first voltage is less than the voltage threshold and the second voltage is less than the voltage threshold, the controller controls the switch to disconnect, and controls the first power supply circuit not to supply power to the electrical device, or controls the electrical device to be in a sleep state.

5. The power control circuit according to any one of claims 1-4, characterized in that, The first power supply circuit further includes a first diode, a positive electrode of the first diode is connected to the power supply, and a negative electrode of the first diode is connected to the electrical device.

6. The power control circuit according to any one of claims 2-4, characterized in that, The second power supply circuit further includes a second diode, a positive electrode of the second diode is connected to the second end of the switch, and a negative electrode of the second diode is connected to the electrical device.

7. The power control circuit according to claim 1, characterized in that, The input terminal of the second power supply circuit is connected to a photovoltaic module or the mains.

8. A control method for a power control circuit, characterized in that, Applied to the power supply control circuit according to any one of claims 1-7, the control method includes: The controller obtains the first voltage from the first power supply circuit; In response to the first voltage being greater than or equal to the voltage threshold, control the first power supply circuit to output the first voltage to the electrical device; In response to the first voltage being less than the voltage threshold, control the second power supply circuit to convert the received external voltage into the second voltage.

9. The control method according to claim 8, characterized in that, The control method further includes: The controller obtains the second voltage from the second power supply circuit; In response to the first voltage being less than the voltage threshold and the second voltage being greater than or equal to the voltage threshold, control the second power supply circuit to output the second voltage to the electrical device; In response to the first voltage being less than the voltage threshold and the second voltage being less than the voltage threshold, control neither the first power supply circuit nor the second power supply circuit to supply power to the electrical device, or control the electrical device to be in a sleep state.

10. An electronic device, characterized in that, Comprising the power supply control circuit according to any one of claims 1-7, the electronic device is used to supply power to the electrical device.

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