Power supply circuit and electronic equipment

Abstract

The utility model discloses a power supply circuit and electronic equipment, and belongs to the technical field of power supply. The power supply circuit comprises a first battery arranged on the first machine body, a second battery arranged on the second machine body, a functional module, a voltage detection module and a switch module; wherein the first end of the voltage detection module is electrically connected with at least one of the first battery and the functional module, and the second end of the voltage detection module is electrically connected with the switch module; the first battery is electrically connected with the function module; the first end of the switch module is electrically connected with the second battery, and the second end of the switch module is electrically connected with the function module; under the condition that the first condition is met, the first end and the second end of the switch module are conducted, so that the second battery supplies power to the functional module; under the condition that the first condition is not met, the first end and the second end of the switch module are disconnected; the first condition comprises at least one of the following conditions: the battery voltage of the first battery is smaller than a voltage threshold, and the input end voltage of the functional module is smaller than the minimum working voltage of the functional module.

Description

Technical Field

[0001] The present application belongs to the field of power supply technology, and specifically relates to a power supply circuit and electronic equipment. Background Art

[0002] With the development of electronic products, more and more foldable phones have been developed. A foldable phone may include a first body and a second body, with the first body being equipped with a charging chip. Each body may be equipped with a battery, with the batteries in different bodies connected in parallel.

[0003] In the prior art, the functional modules of the second body are powered by the following methods: 1. The functional modules of the second body are powered by the battery of the first body, that is, VPH is used for power supply; 2. The functional modules of the second body are powered directly by the battery of the second body.

[0004] However, for VPH power supply, the power supply circuit is pulled from the first body to the second body through a flexible printed circuit (FPC). The path is long and the impedance is large, which will cause voltage drops. When the battery voltage of the first body is low, the voltage drop can easily cause the input voltage of the functional module of the second body to fall below the lower limit of the power supply requirement, resulting in low power supply reliability. For direct power supply, since the functional modules of the second body are all hung on the battery of the second body, when the battery is fully charged, the functional modules cannot directly draw power from the charger and can only consume the power of the battery of the second body. This will trigger the restart of charging, resulting in frequent and repeated charging and stopping, bringing battery safety risks. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a power supply circuit and electronic equipment that can solve the problem of low power supply reliability of the functional modules of the second body without bringing battery safety risks.

[0006] In a first aspect, an embodiment of the present application provides a power supply circuit for an electronic device, the electronic device including a first body and a second body, the power supply circuit including: a first battery provided in the first body, a second battery provided in the second body and a functional module, a voltage detection module, and a switch module;

[0007] The first end of the voltage detection module is electrically connected to at least one of the first battery and the functional module, and the second end of the voltage detection module is electrically connected to the switch module; the first battery is electrically connected to the functional module; the first end of the switch module is electrically connected to the second battery, and the second end of the switch module is electrically connected to the functional module; the voltage detection module is used to control the conduction state of the switch module;

[0008] When the first condition is met, the first end and the second end of the switch module are connected, so that the second battery supplies power to the functional module; when the first condition is not met, the first end and the second end of the switch module are disconnected;

[0009] The first condition includes at least one of the following: the battery voltage of the first battery is less than a voltage threshold, and the input terminal voltage of the functional module is less than a minimum operating voltage of the functional module.

[0010] In a second aspect, an embodiment of the present application provides an electronic device, comprising a first body, a second body, and a power supply circuit as described in the first aspect.

[0011] In an embodiment of the present application, a power supply circuit includes a first battery disposed in a first body, a second battery disposed in a second body, and a functional module, a voltage detection module, and a switch module, wherein a first end of the voltage detection module is electrically connected to at least one of the first battery and the functional module, and a second end is electrically connected to the switch module; the first battery is electrically connected to the functional module; a first end of the switch module is electrically connected to the second battery, and a second end of the switch module is electrically connected to the functional module; and the voltage detection module is configured to control the conduction state of the switch module. When a first condition is satisfied, the first condition including at least one of the following: the battery voltage of the first battery is less than a voltage threshold, and the input voltage of the functional module is less than the minimum operating voltage of the functional module, the first end and the second end of the switch module are electrically connected, thereby connecting the second battery to the functional module and introducing the second battery to increase the input voltage of the functional module. This reduces the probability of the input voltage of the functional module falling below the lower limit of the power supply requirement, thereby improving the power supply reliability of the functional module. When the first condition is not met, the first end and the second end of the switch module are disconnected, so that the second battery is disconnected from the functional module, and the second battery is removed from the power supply circuit. Using VPH for power supply can reduce the charging trigger frequency, thereby improving battery safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1a This is one of the structural diagrams of the power supply circuit provided in the embodiment of the present application;

[0013] Figure 1b This is the second structural diagram of the power supply circuit provided in the embodiment of the present application;

[0014] Figure 1c This is the third structural diagram of the power supply circuit provided in the embodiment of the present application;

[0015] Figure 2 This is the fourth structural diagram of the power supply circuit provided in the embodiment of the present application;

[0016] Figure 3 This is the fifth structural diagram of the power supply circuit provided in the embodiment of the present application;

[0017] Figure 4 This is the sixth structural diagram of the power supply circuit provided in the embodiment of the present application;

[0018] Figure 5 This is the seventh structural diagram of the power supply circuit provided in the embodiment of the present application;

[0019] Figure 6 This is a flow chart of the power supply method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0021] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0022] For ease of understanding, some of the contents involved in this application are explained below.

[0023] Some power supply circuits such as Figures 1a to 1c As shown, in Figures 1a to 1c In the figure, body 1 is the first body, body 2 is the second body, and body 2 includes functional modules 1 to 3. The circuit power supply and communication of body 1 and body 2 are connected through FPC.

[0024] Body 1 is equipped with a charging chip (charging IC), which has a battery path management function. Specifically, it can turn off or on battery 1 (BT1) through Q4, allowing the system to choose to draw power from the charger or battery. Body 2 is equipped with functional modules 1-3.

[0025] exist Figure 1a In the example, functional modules 1-3 are powered by the power network VPH. When the battery voltage (VBT1) of battery 1 is low, the voltage drop can easily cause the input voltage of the functional module of the second body to drop below the power supply requirement lower limit, resulting in low power supply reliability.

[0026] exist Figure 1b In the example, functional modules 1-3 are directly connected to battery 2 (BT2) for power supply. In this case, when the battery is fully charged, the Q4 tube of the charging IC will be cut off, and the system will directly draw power from the charger. At this time, since functional modules 1-3 are all connected to battery 2, the power of battery 2 will be consumed, which will cause charging to restart. This repeated charging and stopping process may cause battery swelling if the number of times is too frequent, which may bring battery safety problems.

[0027] exist Figure 1c in Figure 1a On the basis of the power supply circuit, a boost or bypass power supply IC is added, which can boost or directly bypass the input and output. When the battery is at high voltage, it is in bypass mode, and the input and output are directly connected; when the battery is at low voltage, it is in boost mode, and the battery voltage is increased before powering the functional modules 1-3. This ensures that after the voltage drop caused by the long FPC impedance, the input voltage of the functional modules 1-3 can still meet the requirements. However, the load capacity of the boost or bypass power supply IC is small. If the current demand of the functional modules 1-3 is large, multiple boost or bypass power supply ICs are needed to power the different functional modules of the fuselage 2 separately, which is costly and occupies a large PCB area. In order to reduce the impact of the FPC impedance, the FPC needs to be made very wide, which also has a great impact on the design and cost of the whole machine.

[0028] Based on this, the embodiment of the present application provides a new power supply circuit that can solve the problem of low power supply reliability of the functional modules of the second body without changing the design of the entire machine, and at the same time does not bring battery safety risks.

[0029] The power supply circuit provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0030] The power supply circuit of the embodiment of the present application can be applied to an electronic device, which includes a first body and a second body. The first body is provided with a charging IC and can be regarded as a main body, and the second body can be regarded as a secondary body.

[0031] In the embodiments of this application, Figure 2 As shown, the power supply circuit may include a first battery 11 provided in the first body 10 , a second battery 21 and a function module 22 provided in the second body 20 , a voltage detection module 30 , and a switch module 40 .

[0032] It is worth noting that in Figure 2In the embodiment, the voltage detection module 30 is disposed in the first body 10 and the switch module 40 is disposed in the second body 20, but this does not limit the location of the voltage detection module 30 and the switch module 40. In other embodiments, the voltage detection module 30 may be disposed in the second body 20, and the specific location may be determined based on actual conditions, and is not limited in this embodiment of the present application.

[0033] exist Figure 2 In the figure, the first end of the voltage detection module 30 is connected to the first battery 11 and the functional module 22 respectively by dashed lines, indicating that the first end of the voltage detection module 30 can be electrically connected to at least one of the first battery 11 and the functional module 22. In actual applications, the component connected to the first end of the voltage detection module 30 can be determined based on actual needs. The second end of the voltage detection module 30 is electrically connected to the switch module 40. The voltage detection module 30 can be used to control the conductive state of the switch module 40.

[0034] When the first end of the voltage detection module 30 is electrically connected to the first battery 11, the voltage detection module 30 can detect the battery voltage of the first battery 11 and control the conduction state of the switch module 40 based on the comparison result of the detected battery voltage of the first battery 11 and the voltage threshold.

[0035] When the first end of the voltage detection module 30 is electrically connected to the functional module 22, the voltage detection module 30 can detect the input terminal voltage of the functional module 22 and control the conduction state of the switch module 40 based on the comparison result of the detected input terminal voltage of the functional module 22 and the minimum operating voltage of the functional module 22.

[0036] The first battery 11 is electrically connected to the functional module 22, so that the first battery 11 can supply power to the functional module 22. Figure 2 As shown, the first battery 11 can be electrically connected to the functional module 22 via Q4 in the charging IC, but is not limited thereto.

[0037] The first end of the switch module 40 is electrically connected to the second battery 21, and the second end of the switch module 40 is electrically connected to the functional module 22. That is, the second battery 21 can be connected to the functional module 22 through the switch module 40. The switch module 40 can be used to control the connectivity between the second battery 21 and the functional module 22 to determine whether to introduce the second battery 21 into the power supply circuit of the functional module 22 to increase the input voltage of the functional module 22.

[0038] In the embodiment of the present application, when the first condition is met, the first end of the switch module 40 is connected to the second end; when the first condition is not met, the first end of the switch module 40 is disconnected from the second end.

[0039] The first condition may include at least one of the following:

[0040] The battery voltage of the first battery 11 detected by the voltage detection module 30 is less than the voltage threshold;

[0041] The voltage at the input end of the functional module 22 detected by the voltage detection module 30 is lower than the minimum operating voltage of the functional module 22 .

[0042] The voltage threshold can be determined based on the impedance between the first battery 11 and the functional module 22. The greater the impedance between the first battery 11 and the functional module 22, the greater the dropout voltage between the first battery 11 and the functional module 22, and the higher the voltage threshold; conversely, the voltage threshold is lower. If the battery voltage of the first battery 11 is lower than the voltage threshold, it means that the first battery 11 cannot meet the power supply requirements of the functional module 22; conversely, the first battery 11 can meet the power supply requirements of the functional module 22.

[0043] It is worth noting that the specific manifestation of the first condition is related to the component connected to the first end of the voltage detection module 30. Specifically, when the first end of the voltage detection module 30 is electrically connected to the first battery 11, the first condition includes the battery voltage of the first battery 11 detected by the voltage detection module 30 being less than a voltage threshold. When the first end of the voltage detection module 30 is electrically connected to the functional module 22, the first condition includes the voltage at the input end of the functional module 22 detected by the voltage detection module 30 being less than a minimum operating voltage. When the first end of the voltage detection module 30 is electrically connected to the first battery 11 and the functional module 22, respectively, the first condition may include: the battery voltage of the first battery 11 detected by the voltage detection module 30 being less than a voltage threshold; and the voltage at the input end of the functional module 22 detected by the voltage detection module 30 being less than a minimum operating voltage.

[0044] If the first condition is met, it indicates that the first battery 11 cannot meet the power supply requirements of the functional module 22. The first and second terminals of the switch module 40 can be connected to connect the second battery 21 and the functional module 22. The second battery 21 is introduced into the power supply circuit of the functional module 22, allowing it to be connected in parallel with the first battery 11 to power the functional module 22, thereby increasing the input voltage of the functional module 22. In this case, the second battery 21 increases the input voltage of the functional module 22 by directly providing the input voltage to the functional module 22. This reduces the probability of the input voltage of the functional module falling below the lower limit of the power supply requirement, thereby improving the power supply reliability of the functional module.

[0045] When the first condition is not met, it means that the first battery 11 can meet the power supply requirements of the functional module 22. The first end and the second end of the switch module 40 can be disconnected to disconnect the second battery 21 and the functional module 22, so that the actual power supply circuit of the functional module 22 does not include the second battery 21. The power supply circuit provides the input terminal voltage to the functional module 22 through the first battery 11. In this way, the charging trigger frequency can be reduced, thereby improving battery safety.

[0046] The power supply circuit of an embodiment of the present application includes a first battery disposed on a first body, a second battery disposed on a second body, and a functional module, a voltage detection module, and a switch module, wherein a first end of the voltage detection module is electrically connected to at least one of the first battery and the functional module, and a second end is electrically connected to the switch module; the first battery is electrically connected to the functional module; the first end of the switch module is electrically connected to the second battery, and the second end of the switch module is electrically connected to the functional module; and the voltage detection module is configured to control the conduction state of the switch module. When a first condition is satisfied, the first condition including at least one of the following: the battery voltage of the first battery is less than a voltage threshold, and the input voltage of the functional module is less than the minimum operating voltage of the functional module, the first end and the second end of the switch module are electrically connected, thereby connecting the second battery to the functional module and introducing the second battery to increase the input voltage of the functional module. This reduces the probability of the input voltage of the functional module falling below the lower limit of the power supply requirement, thereby improving the power supply reliability of the functional module. When the first condition is not met, the first end and the second end of the switch module are disconnected, so that the second battery is disconnected from the functional module, and the second battery is removed from the power supply circuit. Using VPH for power supply can reduce the charging trigger frequency, thereby improving battery safety.

[0047] In some embodiments, when the first end of the voltage detection module 30 is electrically connected to the first battery 11 or one of the functional modules 22, as shown in FIG. Figure 2 As shown, the second end of the voltage detection module 30 is electrically connected to the control end of the switch module 40 .

[0048] In this embodiment, the voltage detection module 30 can directly control the conduction state of the control switch module 40. In specific implementation, the conduction state of the switch module 40 can be controlled by outputting a signal, which can be a control signal or a level signal, depending on actual needs and is not limited in this embodiment of the application.

[0049] The embodiments of the present application do not limit the specific form of the switch module 40. The switch module 40 may be any electronic switch element, such as a transistor or a MOS transistor. In some embodiments, the switch module 40 may be a PMOS transistor; wherein the first end of the switch module 40 is the source of the PMOS transistor, the second end of the switch module 40 is the drain of the PMOS transistor, and the control end of the switch module 40 is the gate of the PMOS transistor.

[0050] In other embodiments, Figure 3 As shown, when the first end of the voltage detection module 30 is electrically connected to the first battery 11 and the functional module 22, the power supply circuit may further include a switch drive circuit 41, wherein the first end of the switch drive circuit 41 is electrically connected to the second end of the voltage detection module 30, and the second end of the switch drive circuit 41 is electrically connected to the control end of the switch module 40.

[0051] The voltage detection module 30 is used to control the working state of the switch driving circuit 41 so that the switch driving circuit 41 controls the conducting state of the switch module 40 .

[0052] When the first condition is met, the first end and the second end of the switch module 40 are connected by the switch driving circuit 41 ; when the first condition is not met, the first end and the second end of the switch module 40 are disconnected by the switch driving circuit 41 .

[0053] In this embodiment, the first end of the voltage detection module 30 is electrically connected to both the first battery 11 and the functional module 22. In order to improve the control accuracy of the conduction state of the switch module 40, a switch driving circuit 41 can be introduced to control the conduction state of the switch module 40.

[0054] In some embodiments, the voltage detection module 30 can transmit the detected battery voltage of the first battery 11 and the input terminal voltage of the functional module 22 to the switch driving circuit 41. The switch driving circuit 41 can independently determine the comparison result of the battery voltage of the first battery 11 with the voltage threshold and the comparison result of the input terminal voltage of the functional module 22 with the minimum operating voltage, and then control the conduction state of the switch module 40 based on the two comparison results.

[0055] In other embodiments, after detecting the battery voltage of the first battery 11 and the input terminal voltage of the functional module 22, the voltage detection module 30 may determine a comparison result between the battery voltage of the first battery 11 and a voltage threshold, and a comparison result between the input terminal voltage of the functional module 22 and a minimum operating voltage, and then transmit the two comparison results to the switch driving circuit 41, so that the switch driving circuit 41 controls the conduction state of the switch module 40 based on the two comparison results.

[0056] In a specific implementation, if the battery voltage of the first battery 11 is less than the voltage threshold and the input voltage of the functional module 22 is less than the minimum operating voltage of the functional module 22, the switch driving circuit 41 can control the switch module 40 to be turned on. Otherwise, the switch driving circuit 41 can control the switch module 40 to be turned off.

[0057] In this embodiment, the switch driving circuit 41 can control the conduction state of the switch module 40 based on the comparison result of the battery voltage of the first battery 11 and the voltage threshold, and the comparison result of the minimum operating voltage of the input terminal voltage of the functional module 22. In this way, the control accuracy of the power supply circuit can be improved.

[0058] In some embodiments, as Figure 4 As shown, the power supply circuit may include a charging or bypass module 42, which is electrically connected to the voltage detection module 30, the second battery 21 and the first battery 11 respectively; the voltage detection module 30 is used to control the conduction state of the charging or bypass module 42.

[0059] When the first condition is met, the second battery 21 charges the first battery 11 through the charging or bypass module 42 ; when the first condition is not met, the second battery 21 is directly connected to the first battery 11 through the charging or bypass module 42 .

[0060] In this embodiment, the second battery 21 is electrically connected to the first battery 11 via a charging or bypass module 42. The charging or bypass module 42 has a charging function and a bypass function. The charging function can charge the battery power of the second battery 21 to the first battery 11, and the bypass function can directly connect the second battery 21 and the first battery 11.

[0061] In a specific implementation, if the first condition is met, the charging or bypass module 42 can perform a charging function, triggering the second battery 21 to charge the first battery 11. In this way, the second battery 21 can increase the input voltage of the functional module 22 by increasing the battery voltage of the first battery 11, thereby improving power supply reliability. In this case, the second battery 21 increases the input voltage of the functional module 22 by charging the first battery.

[0062] When the first condition is not met, the charging or bypass module 42 can perform a bypass function and directly connect the second battery 21 and the first battery 11, so that the actual power supply circuit of the functional module 22 does not include the second battery 21. In this way, the charging trigger frequency can be reduced, thereby improving battery safety.

[0063] In this embodiment, the charging or bypass module can switch its function based on the voltage detected by the voltage detection module. When the charging or bypass module is performing the charging function, the second battery can charge the first battery, increasing the battery voltage of the first battery, thereby increasing the input voltage of the functional module 22 and improving power supply reliability.

[0064] The embodiments of the present application do not limit the specific structure of the charging or bypass module 42. Any unit that can implement the above principles can fall within the protection scope of the embodiments of the present application.

[0065] In some embodiments, the charging or bypass module 42 may include a path switching component, a charging circuit, and a bypass circuit, wherein the charging circuit is used to implement a charging function, and the bypass circuit is used to implement a bypass function.

[0066] A first end of the path switching assembly is electrically connected to the second battery 21, a second end of the path switching assembly is electrically connected to the first end of the charging circuit, and a third end of the path switching assembly is electrically connected to the first end of the bypass circuit. The second ends of the charging circuit and the bypass circuit are both electrically connected to the first battery 11.

[0067] The voltage detection module 30 is used to control the conduction state of the path switching component.

[0068] When the first condition is met, the first and second terminals of the path switching component are electrically connected, and the first and third terminals of the path switching component are disconnected. In this case, the second battery 21 is electrically connected to the first battery 11 via the charging circuit. The second battery 21 can charge the first battery 11 through the charging circuit, increasing the battery voltage of the first battery 11, thereby increasing the input voltage of the functional module 22 and improving the reliability of the power supply.

[0069] If the first condition is not met, the first and third terminals of the path switching component are electrically connected, while the first and second terminals of the path switching component are disconnected. In this case, the second battery 21 is electrically connected to the first battery 11 via a bypass circuit, and the second battery 21 is directly connected to the first battery 11. Using VPH power supply can reduce the charging trigger frequency, thereby improving battery safety.

[0070] In this embodiment, the actual power supply circuit of the functional module can be changed by controlling the states between the first end, the second end, and the third end of the path switching component, thereby improving charging reliability while ensuring battery safety.

[0071] The embodiment of the present application does not limit the specific structure of the voltage detection module 30 .

[0072] In some embodiments, the voltage detection module 30 may include at least one of a first voltage detection unit and a second voltage detection unit, wherein the first voltage detection unit may be electrically connected to the first battery 11 for detecting the battery voltage of the first battery 11. Therefore, the first voltage detection unit may also be referred to as a VBAT voltage detection unit; the second voltage detection unit may be electrically connected to the functional module 22 for detecting the input voltage of the functional module 22.

[0073] The detection of the input terminal voltage of the functional module 22 is described in detail below.

[0074] In some embodiments, as Figure 5 As shown, the voltage detection module 30 may include a comparator 31. Specifically, the second voltage detection unit includes the comparator 31.

[0075] The first input terminal of the comparator 31 is electrically connected to the input terminal of the functional module 22, the second input terminal of the comparator 31 is input with the minimum operating voltage, and the output terminal of the comparator 31 is electrically connected to the switch module 40. Based on this connection relationship, it can be understood that the first input terminal of the comparator 31 is input with the input terminal voltage of the functional module 22, and the comparator 31 can compare the input voltage of the first input terminal with the input voltage of the second input terminal to obtain a comparison result between the two. Thereafter, the comparator 31 outputs a signal matching the comparison result to the switch module 40 through the output terminal, indicating the comparison result between the input terminal voltage of the functional module 22 and the minimum operating voltage.

[0076] For Figure 5 In the power supply circuit shown in FIG. 1 , in one example, when the comparison result between the two is that the input voltage of the functional module 22 is less than the minimum operating voltage, the comparator 31 may output a high level; otherwise, the comparator 31 may output a low level.

[0077] In this embodiment, a comparator can output a signal to the switch module to indicate the comparison result between the input voltage of the functional module and the minimum operating voltage. In this way, the switch module can accurately switch the actual power supply circuit of the functional module based on the signal of the comparator, thereby improving the reliability of the power supply.

[0078] In the embodiment of the present application, the number of functional modules 22 in the second body 20 can be set based on actual needs, and the number of functional modules 22 can be greater than or equal to one.

[0079] In some embodiments, when the number of functional modules 22 is N, where N is an integer greater than 1, the voltage detection module 30 includes N comparators 31 and a signal processing circuit 32. Specifically, the second voltage detection unit includes N comparators 31 and a signal processing circuit 32.

[0080] In this embodiment, N comparators 31 correspond one-to-one to N functional modules 22, and the output signal of each comparator 31 in the N comparators 31 is used to indicate the comparison result between the input terminal voltage of the functional module 22 corresponding to the comparator 31 and the minimum operating voltage; the output terminals of the N comparators 31 are electrically connected to the switch module 40 through the signal processing circuit 32.

[0081] The signal processing circuit 32 is used to:

[0082] There is a first comparator among the N comparators 31. When the input terminal voltage of the functional module 22 corresponding to the first comparator is lower than the minimum operating voltage, the first comparator outputs a first signal, which is used to indicate that the input terminal voltage of the functional module 22 is lower than the minimum operating voltage;

[0083] In the case that the first comparator does not exist in the N comparators 31 , a second signal is output, where the second signal is used to indicate that the input voltage of the functional module 22 is greater than or equal to the minimum operating voltage.

[0084] For easier understanding, see Figure 5 .exist Figure 5 In the embodiment, the second body includes three functional modules 22 , and correspondingly, three comparators 31 are provided. The first input end of each comparator 31 is connected to a functional module 22 , and the output end of each comparator 31 is connected to a signal processing circuit 32 .

[0085] When the signal processing circuit 32 detects that the voltage of a functional module 22 detected by the comparator 31 is lower than the minimum operating voltage, it can output a first signal, so that the switch module 40 determines that the first condition is met and introduces the second battery to increase the input voltage of the functional module 22.

[0086] When the signal processing circuit 32 obtains that the voltage of the functional modules 22 detected by all comparators 31 is less than the minimum operating voltage, it can output a second signal, so that the switch module 40 determines that the first condition is not met and does not introduce the second battery to increase the input voltage of the functional module 22.

[0087] The embodiment of the present application does not limit the specific structure of the signal processing circuit 32. In some embodiments, such as Figure 5 As shown, the signal processing circuit 32 may be an OR gate, but is not limited thereto.

[0088] In this embodiment, when the number of functional modules in the second body is greater than one, a comparator can be provided for each functional module to detect whether the input terminal voltage of the functional module is less than the minimum input terminal voltage, and the signal processing module determines its own output signal based on the output signal of each comparator, so that the switching module can accurately determine whether the first condition is met, and then accurately switch the actual power supply circuit of the functional module, thereby improving the reliability of power supply.

[0089] It should be noted that the various optional embodiments introduced in the embodiments of the present application can be implemented in combination with each other or separately if they do not conflict with each other, and the embodiments of the present application do not limit this.

[0090] For easier understanding, the following examples are provided:

[0091] In some embodiments, the power supply circuit may be as follows Figure 5 As shown,

[0092] exist Figure 5 In the figure, body 1 is the first body and body 2 is the second body. The power supply circuit includes a first battery 11, a second battery 21, three functional modules 22, a VBAT voltage detection unit, three comparators 31, an OR gate 32, a switch module 40 and a switch drive circuit 41. The connection relationship of each component in the power supply circuit can be referred to the above description and Figure 5 , no more details.

[0093] for Figure 5 In the illustrated power supply circuit, the VBAT detection unit detects the battery voltage of the first battery 11. Only when the battery voltage of the first battery 11 falls below a voltage threshold does the switch driver circuit 41 enable the switch module 40 to conduct. This is because only at low voltages can the voltage drop below the lower limit after the power is drawn from the main body 2. When the first battery 11 is at high voltage or fully charged, the switch module 40 is disconnected, eliminating the safety issues associated with repeated charging and discharging of the fully charged battery.

[0094] Comparator 31 detects the voltage of the power supply pin of each connected functional module 22 and compares the detected voltage at the input of the functional module 22 with a reference voltage vref. Reference voltage vref is set as the voltage lower limit required by the functional module, i.e., the minimum operating voltage. When the voltage at the functional module pin is lower than vref, comparator 31 outputs a high level.

[0095] The output of the comparator 31 corresponding to each functional module 22 is connected to the OR gate 32. When any comparator 31 detects that the pin voltage is lower than the lower limit, that is, any comparator 31 outputs a high level, the OR gate 32 outputs a high level, and the high level controls the MOS drive circuit to work, driving the switch module 40 to open. At this time, the second battery 21 is connected to the functional module 22 of the fuselage 2, which can supply power to the functional module 22 of the fuselage 2 and increase the input voltage of the functional module 22.

[0096] To understand the working process of the power supply circuit, please refer to Figure 6 .

[0097] like Figure 6 As shown, the power supply method may include the following steps:

[0098] Step 601: Determine whether the battery voltage is less than a voltage threshold.

[0099] If so, execute step 602; otherwise, execute step 605.

[0100] Step 602: Determine whether there is a comparator outputting a high level.

[0101] If so, execute step 603; otherwise, execute step 605.

[0102] Step 603: Turn on the switch component.

[0103] Step 604 , determining whether the battery voltage is greater than or equal to a voltage threshold.

[0104] If so, step 605 is executed; otherwise, the switch component is controlled to be in the on state.

[0105] Step 605: disconnect the switch assembly.

[0106] for Figure 5 The power supply circuit shown does not require the use of multiple external boost or bypass power ICs. Instead, a voltage detection module and a MOS tube are used to introduce a second battery to power the functional module, thereby increasing the input voltage of the functional module. This circuit occupies a small area and is low in cost.

[0107] An embodiment of the present application also provides an electronic device, including a first body, a second body, and a power supply circuit provided in an embodiment of the present application, which can achieve the same beneficial effects as the power supply circuit. To avoid repetition, it will not be repeated here.

[0108] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0109] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0110] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A power supply circuit, characterized in that: Applied to an electronic device, the electronic device comprises a first body and a second body, the power supply circuit comprises: a first battery arranged in the first body, a second battery and a functional module arranged in the second body, a voltage detection module, and a switch module; The first end of the voltage detection module is electrically connected to at least one of the first battery and the functional module, and the second end of the voltage detection module is electrically connected to the switch module; the first battery is electrically connected to the functional module; the first end of the switch module is electrically connected to the second battery, and the second end of the switch module is electrically connected to the functional module; the voltage detection module is used to control the conduction state of the switch module; When the first condition is met, the first end of the switch module is connected to the second end so that the second battery supplies power to the functional module; when the first condition is not met, the first end of the switch module is disconnected from the second end; The first condition includes at least one of the following: a battery voltage of the first battery is less than a voltage threshold, and an input terminal voltage of the functional module is less than a minimum operating voltage of the functional module.

2. The power supply circuit according to claim 1, characterized in that: When the first end of the voltage detection module is electrically connected to the first battery or one of the functional modules, the second end of the voltage detection module is electrically connected to the control end of the switch module.

3. The power supply circuit according to claim 1, characterized in that: In a case where the first end of the voltage detection module is electrically connected to the first battery and the functional module, the power supply circuit further includes a switch driving circuit; The first end of the switch driving circuit is electrically connected to the second end of the voltage detection module, and the second end of the switch driving circuit is electrically connected to the control end of the switch module; the voltage detection module is used to control the working state of the switch driving circuit so that the switch driving circuit controls the conduction state of the switch module; When the first condition is met, the switch driving circuit drives the first end and the second end of the switch module to be turned on; when the first condition is not met, the switch driving circuit drives the first end and the second end of the switch module to be turned off.

4. The power supply circuit according to claim 2, characterized in that: The switch module is a PMOS tube; wherein the first end of the switch module is the source of the PMOS tube, the second end of the switch module is the drain of the PMOS tube, and the control end of the switch module is the gate of the PMOS tube.

5. The power supply circuit according to claim 1, characterized in that: The power supply circuit further includes a charging or bypass module, which is electrically connected to the voltage detection module, the second battery and the first battery respectively; the voltage detection module is used to control the conduction state of the charging or bypass module; When the first condition is met, the second battery charges the first battery through the charging or bypass module; when the first condition is not met, the second battery is directly connected to the first battery through the charging or bypass module.

6. The power supply circuit according to claim 5, characterized in that: The charging or bypass module includes a path switching component, a charging circuit and a bypass circuit; The first end of the path switching component is electrically connected to the second battery, the second end of the path switching component is electrically connected to the first end of the charging circuit, and the third end of the path switching component is electrically connected to the first end of the bypass circuit; the second end of the charging circuit and the second end of the bypass circuit are both electrically connected to the first battery; the voltage detection module is used to control the conduction state of the path switching component; When the first condition is met, the first end of the path switching component is connected to the second end, and the first end of the path switching component is disconnected from the third end; When the first condition is not met, the first end of the path switching component is connected to the third end, and the first end of the path switching component is disconnected from the second end.

7. The power supply circuit according to any one of claims 1 to 6, characterized in that: The voltage detection module includes a comparator; The first input terminal of the comparator is electrically connected to the input terminal of the functional module, the second input terminal of the comparator inputs the minimum operating voltage, and the output terminal of the comparator is electrically connected to the switch module; The output signal of the output terminal of the comparator is used to indicate the comparison result between the input terminal voltage of the functional module and the minimum operating voltage.

8. The power supply circuit according to claim 7, characterized in that: When the number of the functional modules is N, and N is an integer greater than 1, the voltage detection module includes N comparators and a signal processing circuit; The N comparators correspond to the N functional modules one by one, and the output signal of each comparator in the N comparators is used to indicate the comparison result between the input terminal voltage of the functional module corresponding to the comparator and the minimum operating voltage; The output ends of the N comparators are electrically connected to the switch module through the signal processing circuit; The signal processing circuit is used for: There is a first comparator among the N comparators, and when the input terminal voltage of the functional module corresponding to the first comparator is less than the minimum operating voltage, the first comparator outputs a first signal, wherein the first signal is used to indicate that the input terminal voltage of the functional module is less than the minimum operating voltage; In the case that the first comparator does not exist in the N comparators, a second signal is output, where the second signal is used to indicate that the input terminal voltage of the functional module is greater than or equal to the minimum operating voltage.

9. The power supply circuit according to claim 8, characterized in that: The signal processing circuit is an OR gate.

10. An electronic device, characterized in that: include: A first body, a second body, and a power supply circuit as claimed in any one of claims 1 to 9.

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