Control circuits and electronic devices

Abstract

The present application discloses a control circuit and an electronic device, belonging to the technical field of electronic devices. The circuit includes: a load, a battery, a control module, a first capacitor and a boost module; the battery is connected to the load, the boost module is respectively connected to the battery and the first capacitor, the control module is respectively connected to the battery, the load, the first capacitor and the boost module, and the control module is used to detect the operating temperature and battery voltage of the electronic device; wherein, when the operating temperature is less than the first threshold, the control module controls the battery and the boost module to charge the first capacitor when the battery voltage is greater than or equal to the reference voltage, and the control module controls the first capacitor to supply power to the load when the battery voltage drops to less than the reference voltage.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a control circuit and an electronic equipment. Background Art

[0002] Lithium-ion batteries are rechargeable batteries that rely on the movement of lithium ions between the positive and negative electrodes to work. During the operation of lithium-ion batteries, the internal resistance of lithium-ion batteries will be affected by the ambient temperature. In low-temperature environments, the diffusion rate of ions and electrochemical reactions slow down, causing the internal resistance of lithium-ion batteries to increase sharply, the voltage drop of lithium-ion batteries to increase, and electronic equipment is prone to abnormal shutdown or freezes. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a control circuit and an electronic device that can solve the problem that the internal resistance of a lithium-ion battery increases sharply in a low temperature environment, the voltage drop of the lithium-ion battery increases, and the electronic device is prone to abnormal shutdown or crash.

[0004] In a first aspect, an embodiment of the present application provides a control circuit, including: a load, a battery, a control module, a first capacitor and a boost module;

[0005] The battery is connected to the load, the boost module is connected to the battery and the first capacitor respectively, the control module is connected to the battery, the load, the first capacitor and the boost module respectively, and the control module is used to detect the operating temperature and battery voltage of the electronic device;

[0006] Wherein, when the operating temperature is lower than a first threshold value, the control module controls the battery and the boost module to charge the first capacitor when the battery voltage is greater than or equal to a reference voltage, and the control module controls the first capacitor to supply power to the load when the battery voltage drops to less than the reference voltage.

[0007] In a second aspect, an embodiment of the present application provides an electronic device, which includes the control circuit as described in the first aspect.

[0008] In an embodiment of the present application, by adding a boost module to the control circuit of the electronic device, when it is detected that the electronic device is in a low temperature environment, the first capacitor is charged by the battery and the boost module of the electronic device, so that when the voltage of the battery is pulled down, the charge stored in the first capacitor is released to supplement the power consumption of the load. In this way, when the electronic device is in a low temperature environment and the battery voltage meets the use requirements, the first capacitor can be charged in advance, and when the battery voltage is reduced to not meet the use requirements, the load of the electronic device is powered by the charged first capacitor, which can effectively reduce the voltage drop of the battery and avoid the problem of abnormal shutdown or crash of the electronic device in a low temperature environment. And, when the operating temperature and battery voltage of the electronic device are normal, the first capacitor can also decouple the battery without adding additional capacitors. In addition, the control circuit of the embodiment of the present application can reduce the number of capacitors, avoid taking up too much space, and be conducive to the design of thin and light electronic devices and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a structural schematic diagram of a control circuit provided in an embodiment of the present application;

[0010] Figure 2 is a structural schematic diagram of another control circuit provided in an embodiment of the present application;

[0011] Figure 3 It is a schematic diagram of the principle of charging a boost capacitor by a battery provided in an embodiment of the present application;

[0012] Figure 4 is a schematic diagram of the principle of charging the first capacitor provided in an embodiment of the present application;

[0013] Figure 5 It is a structural schematic diagram of another control circuit provided in an embodiment of the present application.

[0014] Reference numerals:

[0015] 10-load; 20-battery; 30-control module, 31-control unit, 311-temperature sensor, 312-voltage comparator, 313-controller, 32-first switch; 40-first capacitor; 50-boost module, 51-switch group, 511-second switch, 512-third switch, 513-fourth switch, 514-fifth switch, 52-boost capacitor, 521-second capacitor, 522-third capacitor. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0017] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "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.

[0018] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0019] During the operation of lithium-ion batteries, the internal resistance of lithium-ion batteries will be affected by the ambient temperature. In a low temperature environment, the diffusion rate of ions and electrochemical reactions slow down, causing the internal resistance of lithium-ion batteries to increase sharply, the voltage drop of lithium-ion batteries to increase, and electronic equipment is prone to abnormal shutdown or freeze.

[0020] In the related art, a capacitor can be connected in parallel to the battery, and the energy storage characteristics of the capacitor can be used to supply power to the system when the electronic device consumes a large amount of power instantly, so as to reduce the voltage drop of the battery and avoid abnormal shutdown or freezing. However, since the energy storage capacity of the capacitor is limited, multiple capacitors need to be set up, which will take up more space inside the electronic device and have a high cost.

[0021] To solve the above problems, an embodiment of the present application provides a control circuit, which adds a boost module and an energy storage capacitor. When it is detected that the electronic device is in a low-temperature environment, the energy storage capacitor is charged through the battery and the boost module of the electronic device, so that when the battery voltage is pulled down, the load is powered by the energy storage capacitor, thereby effectively reducing the voltage drop of the battery and avoiding the problem of abnormal shutdown or freezing of the electronic device in a low-temperature environment. In addition, the present application does not need to add additional capacitors, avoids taking up too much space, is conducive to the design of lightweight electronic devices, and reduces costs.

[0022] The control 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.

[0023] An embodiment of the present application provides a control circuit for use in an electronic device product, wherein the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, a wearable device, or other electronic device.

[0024] See also Figure 1 The embodiment of the present application discloses a control circuit, which may include a load 10, a battery 20, a control module 30, a first capacitor 40 and a boost module 50; the battery 20 is connected to the load 10, the boost module 50 is respectively connected to the battery 20 and the first capacitor 40, the control module 30 is respectively connected to the battery 20, the load 10, the first capacitor 40 and the boost module 50, and the control module 30 is used to detect the operating temperature and battery voltage of the electronic device.

[0025] In which, when the operating temperature is lower than the first threshold, the control module 30 controls the battery 20 and the boost module 50 to charge the first capacitor 40 when the battery voltage is greater than or equal to the reference voltage, and the control module 30 controls the first capacitor 40 to supply power to the load 10 when the battery voltage drops to less than the reference voltage.

[0026] In this embodiment, the load 10 may be various power-consuming modules in an electronic device.

[0027] In this embodiment, the first capacitor 40 is used as an energy storage capacitor to store the charge input by the battery 20 and the boost module 50 so as to supply power to the load 10 when the battery voltage is too low.

[0028] In this embodiment, the boost module 50 is used to charge the first capacitor 40 when the electronic device is in a low-temperature working environment.

[0029] In this embodiment, the first threshold value may be used to measure whether the electronic device is in a low-temperature working environment. When the operating temperature of the electronic device is greater than the first threshold value, it indicates that the electronic device is in a normal working environment. When the operating temperature of the electronic device is less than the first threshold value, it indicates that the operating temperature of the electronic device is too low, that is, the electronic device is in a low-temperature working environment. It should be noted that the first threshold value can be set according to actual experience. For example, the first threshold value is 15°C, and this embodiment of the present application does not specifically limit this.

[0030] In this embodiment, the reference voltage can be used to measure whether the battery voltage is too low. When the battery voltage is greater than or equal to the reference voltage, it means that the battery voltage of the battery 20 can meet the power demand of the load 10 of the electronic device. When the battery voltage is less than the reference voltage, it means that the battery voltage of the battery 20 is too low and cannot meet the power demand of the load 10 of the electronic device. It should be noted that the reference voltage can be set according to the minimum operating voltage of the electronic device, and the embodiment of the present application does not specifically limit this.

[0031] Based on this, the control module 30 can be used to detect the operating temperature and battery voltage of the electronic device, and when the operating temperature of the electronic device is less than the first threshold, the battery 20, the boost module 50 and the first capacitor 40 are controlled to operate according to the battery voltage of the electronic device, so that when the battery voltage is greater than the reference voltage, the battery 20 and the boost module are controlled to charge the first capacitor 40, and when the battery voltage drops to less than the reference voltage, the first capacitor 40 is controlled to supply power to the load 10.

[0032] In an embodiment of the present application, by adding a boost module to the control circuit of the electronic device, when it is detected that the electronic device is in a low temperature environment, the first capacitor is charged by the battery and the boost module of the electronic device, so that when the voltage of the battery is pulled down, the charge stored in the first capacitor is released to supplement the power consumption of the load. In this way, when the electronic device is in a low temperature environment and the battery voltage meets the use requirements, the first capacitor can be charged in advance, and when the battery voltage is reduced to not meet the use requirements, the load of the electronic device is powered by the charged first capacitor, which can effectively reduce the voltage drop of the battery and avoid the problem of abnormal shutdown or crash of the electronic device in a low temperature environment. And, when the operating temperature and battery voltage of the electronic device are normal, the first capacitor can also decouple the battery without adding additional capacitors. In addition, the control circuit of the embodiment of the present application can reduce the number of capacitors, avoid taking up too much space, and be conducive to the design of thin and light electronic devices and reduce costs.

[0033] In some embodiments of this application, see Figure 2, the control module 30 may include a control unit 31 and a first switch 32. The first end of the control unit 31 is connected to the battery 20 and the load 10 respectively, the second end of the control unit 31 is connected to the reference voltage, and the third end of the control unit 31 is connected to the boost module 50; the first end of the first switch 32 is connected to the fourth end of the control unit 31, the second end of the first switch 32 is connected to the battery 20 and the load 10 respectively, and the third end of the first switch 32 is connected to the first capacitor 40 and the boost module 50 respectively;

[0034] Among them, when the operating temperature is lower than the first threshold and the battery voltage is greater than or equal to the reference voltage, the control unit 31 controls the first switch 32 to be disconnected so that the battery 20 and the boost module 50 charge the first capacitor 40; thereafter, when the operating temperature is lower than the first threshold and the battery voltage is lower than the reference voltage, the control unit 31 controls the first switch 32 to be turned on so that the first capacitor 40 supplies power to the load 10.

[0035] In this embodiment, the control unit 31 can be used to detect the operating temperature and battery voltage of the electronic device. The control unit 31 can also control the on and off of the first switch 32. When the first switch 32 is turned on, the battery 20 and the first capacitor 40 connected in parallel supply power to the load 10, and when the first switch 32 is turned off, the battery 20 can charge the boost module 50, and the battery 20 and the boost module 50 can charge the first capacitor 40.

[0036] The working principle of the control circuit can be that when the operating temperature of the electronic device is greater than or equal to the first threshold, the battery 20 controls the first switch 32 to be turned on, and the battery 20 and the first capacitor 40 connected in parallel supply power to the load 10. When the operating temperature is less than the first threshold, when the battery voltage is greater than or equal to the reference voltage, the control unit 31 controls the first switch 32 to be turned off, and the battery 20 charges the boost module 50. After the boost module 50 is charged, the boost module 50 and the battery 20 simultaneously charge the first capacitor 40. Afterwards, as the battery voltage of the battery 20 decreases, when the battery voltage is less than the reference voltage, the control unit 31 controls the first switch 32 to be turned on, so that the charged first capacitor 40 supplies power to the load 10.

[0037] In this embodiment, by setting the control unit and the first switch, the control unit can control the on and off of the first switch according to the operating temperature of the electronic device and the battery voltage, so that when it is detected that the electronic device is in a low temperature environment, the first capacitor is charged through the battery and the boost module of the electronic device, and when the battery voltage is pulled down, the charge stored in the first capacitor is released to supplement the power consumption of the load. In this way, when the electronic device is in a low temperature environment and the battery voltage meets the use requirements, the first capacitor can be charged in advance, and when the battery voltage is reduced to not meet the use requirements, the load of the electronic device is powered by the charged first capacitor, which can effectively reduce the voltage drop of the battery and avoid the problem of abnormal shutdown or crash of the electronic device in a low temperature environment.

[0038] In some optional embodiments, the first switch 32 is a field effect transistor switch. In this embodiment, the working principle of the field effect transistor is used to control the on and off of the first switch to control the power supply mode of the electronic device, and the circuit structure is simple.

[0039] In some embodiments of this application, please continue to refer to Figure 2 The control unit 31 may include a temperature sensor 311, a voltage comparator 312 and a controller 313. The temperature sensor 311 is used to detect the operating temperature of the electronic device. The positive input terminal of the voltage comparator 312 is connected to the positive electrode of the battery 20, and the negative input terminal of the voltage comparator 312 is connected to the reference voltage. The first input terminal of the controller 313 is connected to the output terminal of the temperature sensor 311, the second input terminal of the controller 313 is connected to the output terminal of the voltage comparator 312, and the output terminal of the controller 313 is respectively connected to the first terminal of the first switch 32 and the boost module 50.

[0040] In this embodiment, if Figure 2 As shown, the temperature sensor 311 is used to detect the operating temperature of the electronic device and output a control signal to the controller 313 according to the operating temperature of the electronic device. The output end of the temperature sensor 311 is connected to the first input end of the controller 313 to output a control signal to the controller 313 according to the operating temperature of the electronic device.

[0041] Exemplarily, when the temperature sensor 311 detects that the operating temperature of the electronic device is greater than or equal to the first threshold, the temperature sensor 311 outputs a low-level signal to the controller 313; when the temperature sensor 311 detects that the operating temperature of the electronic device is less than the first threshold, the temperature sensor 311 outputs a high-level signal to the controller 313. In other words, when the electronic device is in a normal temperature environment, the temperature sensor 311 outputs a low-level signal to the controller 313, and when the electronic device is in a low temperature environment, the temperature sensor 311 outputs a high-level signal to the controller 313.

[0042] The positive input terminal of the voltage comparator 312 is connected to the positive electrode of the battery 10, the negative electrode of the battery 10 is grounded, and the inverting input terminal of the voltage comparator 312 is connected to a reference voltage providing module (not shown in the figure). The reference voltage providing module is used to output a reference voltage, that is, the inverting input terminal of the voltage comparator 312 is connected to the reference voltage, and the output terminal of the voltage comparator 312 is connected to the second input terminal of the controller 313. The voltage comparator 312 is used to compare the battery voltage with the reference voltage, and output a control signal to the controller 313 according to the comparison result of the battery voltage and the reference voltage.

[0043] Alternatively, the voltage comparator 312 may be a hysteresis comparator.

[0044] Exemplarily, when the battery voltage input to the positive input terminal is greater than or equal to the reference voltage input to the negative input terminal, the voltage comparator 312 outputs a low level signal to the controller 313; when the battery voltage input to the positive input terminal is less than the reference voltage input to the negative input terminal, the voltage comparator 312 outputs a high level signal to the controller 313. In other words, when the battery voltage is a normal working voltage, the voltage comparator 312 outputs a low level signal to the controller 313, and when the battery voltage is a low voltage, the voltage comparator 312 outputs a high level signal to the controller 313.

[0045] The output end of the controller 313 is connected to the first end of the first switch 32, the second end of the first switch 32 is respectively connected to the positive electrode of the battery 20 and the load 10, and the third end of the first switch 32 is respectively connected to the first capacitor 40 and the boost module 50. The output end of the controller 313 is also connected to the boost module 50. Based on this, the controller 313 can control the first switch 32 and the boost module 50 to work according to the control signal input by the temperature sensor 311 and the voltage comparator 312.

[0046] In this embodiment, by setting a voltage comparator, the battery voltage can be compared with the reference voltage to detect whether the battery voltage is too low, and by setting a temperature sensor, it can be detected whether the electronic device is in a low temperature environment. The controller is connected to the voltage comparator and the temperature sensor respectively, and can control the on and off of the first switch in combination with the temperature condition and the voltage condition, so that when the electronic device is in a low temperature environment, the first capacitor is charged through the boost module, and when the battery voltage is too low, the load is powered by the first capacitor, which can effectively reduce the voltage drop of the battery, avoid the phenomenon of freezing and sudden shutdown of the electronic device, and provide a better user experience.

[0047] In some embodiments of the present application, the controller 313 is a logic gate circuit. Optionally, the controller 313 can be an XOR gate circuit. For the XOR gate circuit, when only one of the two input terminals is at a low level, the output is a low level. When the input levels of the two input terminals are the same, the output is a high level.

[0048] For example, please see Figure 2 When the electronic device is in a normal temperature environment and the battery voltage is normal, that is, when the operating temperature of the electronic device detected by the temperature sensor 311 is greater than or equal to the first threshold, and the battery voltage is greater than or equal to the reference voltage, the temperature sensor 311 outputs a low-level signal to the controller 313, the voltage comparator 312 outputs a low-level signal to the controller 313, and the controller 313 outputs a high-level signal to the first switch 32 to turn on the first switch 32.

[0049] When the electronic device is in a low temperature environment and the battery voltage is normal, that is, when the operating temperature of the electronic device detected by the temperature sensor 311 is less than the first threshold value, and the battery voltage is greater than or equal to the reference voltage, the temperature sensor 311 outputs a high level signal to the controller 313, the voltage comparator 312 outputs a low level signal to the controller 313, and the controller 313 outputs a low level signal to the first switch 32 to disconnect the first switch 32.

[0050] When the electronic device is in a low temperature environment and the battery voltage is low, that is, when the operating temperature of the electronic device detected by the temperature sensor 311 is less than the first threshold value, and the battery voltage is less than the reference voltage, the temperature sensor 311 outputs a high level signal to the controller 313, the voltage comparator 312 outputs a high level signal to the controller 313, and the controller 313 outputs a high level signal to the first switch 32 to turn on the first switch 32.

[0051] In this embodiment, by utilizing the working principle of the XOR gate circuit, the on-off of the first switch can be controlled according to the temperature and voltage conditions of the electronic device. The implementation is simple and the circuit structure can be simplified.

[0052] In some embodiments of this application, please continue to refer to Figure 2 , the boost module 50 includes a switch group 51 and a boost capacitor 52. The switch group 51 is connected to the battery 20, the control module 30 and the first capacitor 40 respectively, and the boost capacitor 52 is connected to the switch group 51. When the switch group 51 is in the first connection state, the battery 20 charges the boost capacitor 52 through the switch group 51; when the switch group 51 is in the second connection state, the boost capacitor 52 charges the first capacitor 40 through the switch group 51.

[0053] For example, Figure 2 As shown, the first end of the switch group 51 is connected to the output end of the controller 313, the second end of the switch group 51 is connected to the positive electrode of the battery 20, the second end of the switch group 51 is also connected to the second end of the first switch 32, the third end of the switch group 51 is connected to the third end of the first switch 32, the third end of the switch group 51 is also connected to the first end of the first capacitor 40, the fourth end of the switch group 51 is grounded, and the switch group 51 is also connected to the boost capacitor 52. The second end of the first switch 32 is also connected to the positive electrode of the battery 20 and the first end of the load 10 respectively, the second end of the load 10 is grounded, the third end of the first switch 32 is also connected to the first end of the first capacitor 40, and the second end of the first capacitor 40 is grounded.

[0054] In this embodiment, the first end of the switch group 51 is an enable end, and the first end of the switch group 51 is connected to the output end of the controller 313, so that when the controller 313 outputs a low level, the switch group 51 starts to work.

[0055] In this embodiment, the control module 30 is connected to the switch group 51 to control the operation of the switch group 51 according to the temperature conditions and voltage conditions of the electronic device. When the electronic device is in a low temperature environment, the battery 20 charges the boost capacitor 52, and the boost capacitor 52 charges the first capacitor 40 by changing the connection mode of the switch group 51. In this way, through the setting of the boost module 50, when the electronic device is in a low temperature environment, the battery is used to store energy in the first capacitor in advance, so that when the battery voltage is too low, the charge stored in the first capacitor is released to supplement the power consumption of the load.

[0056] In this embodiment, the switch group 51 may include multiple switches, and the boost capacitor 52 may also include multiple capacitors. By adjusting the connection relationship between the multiple switches in the switch group 51 and the multiple capacitors in the boost capacitor, the amount of charge stored in the first capacitor by the boost module 50 can be adjusted. It should be noted that the connection relationship between the multiple switches in the switch group 51 and the multiple capacitors in the boost capacitor can be set according to the different voltages required by the load.

[0057] In some optional embodiments, please continue to see Figure 2 The switch group 51 includes a second switch 511, a third switch 512, a fourth switch 513 and a fifth switch 514. The first end of the second switch 511 is connected to the first end of the first capacitor 40, and the second end of the second switch 511 is connected to the positive electrode of the battery 20; the first end of the third switch 512 is respectively connected to the second end of the second switch 511 and the positive electrode of the battery 20; the first end of the fourth switch 513 is respectively connected to the first end of the second switch 511 and the first end of the first capacitor 40, and the second end of the fourth switch 513 is connected to the second end of the third switch 512; the first end of the fifth switch 514 is connected to the positive electrode of the battery 20, and the second end of the fifth switch 514 is grounded.

[0058] The boost capacitor 52 includes a second capacitor 521 and a third capacitor 522. The first end of the second capacitor 521 is connected to the control end of the second switch 511, and the second end of the second capacitor 521 is connected to the control end of the third switch 512; the first end of the third capacitor 522 is connected to the control end of the fourth switch 513, and the second end of the third capacitor 522 is connected to the control end of the fifth switch 514.

[0059] Exemplarily, the second switch 511 , the third switch 512 , the fourth switch 513 , and the fifth switch 514 are all single-pole double-throw switches.

[0060] by Figure 2 Taking the boost module shown as an example, the working process of the control circuit of the embodiment of the present application is: when the electronic device is in a normal temperature environment and the battery voltage is normal, that is, when the operating temperature of the electronic device detected by the temperature sensor 311 is greater than or equal to the first threshold value, and the battery voltage is greater than or equal to the reference voltage, the temperature sensor 311 outputs a low-level signal to the controller 313, the voltage comparator 312 outputs a low-level signal to the controller 313, and the controller 313 outputs a high-level signal to the first switch 32 to turn on the first switch 32. At the same time, the controller 313 outputs a high-level signal to the switch group 51, and the switch group 51 does not work. At this time, the boost module 50 does not work, the battery 20 is connected in parallel with the first capacitor 40, and the parallel battery 20 and the first capacitor 40 supply power to the load 10.

[0061] When the electronic device is in a low temperature environment and the battery voltage is normal, that is, when the operating temperature of the electronic device detected by the temperature sensor 311 is less than the first threshold value and the battery voltage is greater than or equal to the reference voltage, the temperature sensor 311 outputs a high level signal to the controller 313, the voltage comparator 312 outputs a low level signal to the controller 313, and the controller 313 outputs a low level signal to the first switch 32 to disconnect the first switch 32. At the same time, the controller 313 outputs a low level signal to the switch group 51, and the switch group 51 starts to work. At this time, the first capacitor 40 is in a state of waiting for boost.

[0062] The voltage boosting process of the first capacitor 40 includes two stages. In the first stage: the battery 20 charges the boosting capacitor 52 through the switch group 51. Exemplarily, when the switch group 51 is in the first connection state, that is, the control end of the second switch 511 is connected to the second end of the second switch 511, the control end of the third switch 512 is connected to the second end of the third switch 512, the control end of the fourth switch 513 is connected to the second end of the fourth switch 513, and the control end of the fifth switch 514 is connected to the second end of the fifth switch 514. Figure 3The second capacitor 521 and the third capacitor 522 are connected in series, one end of the second capacitor 521 and the third capacitor 522 are connected to the positive electrode of the battery 20, and the other end is grounded. The battery 20 charges the second capacitor 521 and the third capacitor 522 so that the voltage across the second capacitor 521 and the third capacitor 522 is equal to the battery voltage (Vin), that is, the voltage across the second capacitor 521 is 1 / 2Vin, and the voltage across the third capacitor 522 is also 1 / 2Vin.

[0063] Phase 2: The boost capacitor 52 charges the first capacitor 40 through the switch group 51. Exemplarily, when the switch group 51 is in the second connection state, that is, the control end of the second switch 511 is connected to the first end of the second switch 511, the control end of the third switch 512 is connected to the first end of the third switch 512, the control end of the fourth switch 513 is connected to the first end of the fourth switch 513, and the control end of the fifth switch 514 is connected to the first end of the fifth switch 514. Figure 4 The second capacitor 521 and the third capacitor 522 are connected in parallel, one end of the second capacitor 521 and the third capacitor 522 are connected to the positive electrode of the battery 20, and the other end is connected to the first end of the first capacitor 40, and the battery 20 and the second capacitor 521 and the third capacitor 522 in parallel charge the first capacitor 40 at the same time until the capacitance across the first capacitor 40 is 1.5Vin.

[0064] It should be noted that the second switch 511 , the third switch 512 , the fourth switch 513 and the fifth switch 514 can be switched at a fixed frequency according to the requirements of the capacitor charging and discharging time.

[0065] When the electronic device is in a low temperature environment and the battery voltage is low, that is, when the operating temperature of the electronic device detected by the temperature sensor 311 is less than the first threshold value and the battery voltage is less than the reference voltage, the temperature sensor 311 outputs a high level signal to the controller 313, the voltage comparator 312 outputs a high level signal to the controller 313, and the controller 313 outputs a high level signal to the first switch 32 to turn on the first switch 32. At the same time, the controller 313 outputs a high level signal to the switch group 51, and the switch group 51 stops working. At this time, the boost module 50 stops working, and the boosted first capacitor 40 supplies power to the load 10.

[0066] When the battery voltage of the electronic device returns to normal, and the electronic device is still in a low temperature environment, that is, when the operating temperature of the electronic device detected by the temperature sensor 311 is less than the first threshold value, and the battery voltage is greater than or equal to the reference voltage, the temperature sensor 311 outputs a high-level signal to the controller 313, and the voltage comparator 312 outputs a low-level signal to the controller 313, and the controller 313 outputs a low-level signal to the first switch 32 to disconnect the first switch 32. At the same time, the controller 313 outputs a low-level signal to the switch group 51, and the switch group 51 starts working again. At this time, the first capacitor 40 is recharged, and the charging process of the first capacitor 40 is as described above, which will not be repeated here.

[0067] When the battery voltage and temperature of the electronic device return to normal, that is, when the operating temperature of the electronic device detected by the temperature sensor 311 is greater than or equal to the first threshold value, and the battery voltage is greater than or equal to the reference voltage, the temperature sensor 311 outputs a low-level signal to the controller 313, the voltage comparator 312 outputs a low-level signal to the controller 313, and the controller 313 outputs a high-level signal to the first switch 32 to turn on the first switch 32. At the same time, the controller 313 outputs a high-level signal to the switch group 51, and the switch group 51 stops working. At this time, the boost module 50 stops working, the battery 20 is connected in parallel with the first capacitor 40, and the parallel battery 20 and the first capacitor 40 supply power to the load 10.

[0068] In some other optional embodiments, see Figure 5 The switch group 51 includes a second switch 511, a third switch 512, a fourth switch 513 and a fifth switch 514. The first end of the second switch 511 is connected to the positive electrode of the battery 20; the first end of the third switch 512 is connected to the positive electrode of the battery 20 and the first end of the second switch 511 respectively; the first end of the fourth switch 513 is connected to the second end of the second switch 511; the first end of the fifth switch 514 is connected to the second end of the third switch 512, and the second end of the fifth switch 514 is grounded.

[0069] The boost capacitor 52 includes a second capacitor 521, a first end of the second capacitor 521 is connected to the second end of the second switch 511 and the first end of the fourth switch 513, and a second end of the second capacitor 521 is connected to the second end of the third switch 512 and the first end of the fifth switch 514.

[0070] by Figure 5Taking the boost module shown as an example, the boost process of the first capacitor 40 is as follows: the first stage: the battery 20 charges the boost capacitor 52 through the switch group 51. Exemplarily, when the switch group 51 is in the first connection state, that is, the second switch 511 is closed, the third switch 512 is disconnected, the fourth switch 513 is disconnected, and the fifth switch 514 is closed, at this time, the first end of the second capacitor 521 is connected to the positive electrode of the battery 20, the second end of the second capacitor 521 is grounded, and the battery 30 charges the second capacitor 521 so that the voltage across the second capacitor 521 is equal to the battery voltage (Vin).

[0071] The second stage: the boost capacitor 52 charges the first capacitor 40 through the switch group 51. Exemplarily, when the switch group 51 is in the second connection state, that is, the second switch 511 is disconnected, the third switch 512 is closed, the fourth switch 513 is closed, and the fifth switch 514 is disconnected, at this time, the first end of the second capacitor 521 is connected to the first end of the first capacitor 40, and the second end of the second capacitor 521 is connected to the positive electrode of the battery 20. The battery 20 and the second capacitor 521 charge the first capacitor 40 at the same time, so that the voltage across the first capacitor 40 is equal to twice the battery voltage (2Vin).

[0072] It should be noted that the second switch 511 , the third switch 512 , the fourth switch 513 and the fifth switch 514 can be switched at a fixed frequency according to the requirements of the capacitor charging and discharging time.

[0073] Understandably, Figure 5 The control process of the first switch of the control circuit shown in FIG. Figure 2 The description of the working process of the control circuit shown will not be repeated here.

[0074] In an embodiment of the present application, by adding a boost module to the control circuit of the electronic device, when it is detected that the electronic device is in a low temperature environment, the first capacitor is charged by the battery and the boost module of the electronic device, so that when the voltage of the battery is pulled down, the charge stored in the first capacitor is released to supplement the power consumption of the load. In this way, when the electronic device is in a low temperature environment and the battery voltage meets the use requirements, the first capacitor can be charged in advance, and when the battery voltage is reduced to not meet the use requirements, the load of the electronic device is powered by the charged first capacitor, which can effectively reduce the voltage drop of the battery and avoid the problem of abnormal shutdown or crash of the electronic device in a low temperature environment. And, when the operating temperature and battery voltage of the electronic device are normal, the first capacitor can also decouple the battery without adding additional capacitors. In addition, the control circuit of the embodiment of the present application can reduce the number of capacitors, avoid taking up too much space, and be conducive to the design of thin and light electronic devices and reduce costs.

[0075] An embodiment of the present application also provides an electronic device, comprising any control circuit provided in the aforementioned embodiments.

[0076] In this embodiment, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, a wearable device, etc.

[0077] It should be noted that the implementation method of the above control circuit embodiment is also applicable to the embodiment of the electronic device and can achieve the same technical effect, which will not be described in detail here.

[0078] Other structures and operations of the control circuit and the electronic device according to the embodiments of the present application are known to those skilled in the art and will not be described in detail here.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] 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 the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A control circuit, characterized in that: include: A load, a battery, a control module, a first capacitor and a boost module; The battery is connected to the load, the boost module is connected to the battery and the first capacitor respectively, the control module is connected to the battery, the load, the first capacitor and the boost module respectively, and the control module is used to detect the operating temperature and battery voltage of the electronic device; Wherein, when the operating temperature is less than a first threshold, the control module controls the battery and the boost module to charge the first capacitor when the battery voltage is greater than or equal to a reference voltage, and the control module controls the first capacitor to supply power to the load when the battery voltage decreases to less than the reference voltage; The boost module comprises: a switch group, wherein the switch group is respectively connected to the battery, the control module and the first capacitor; A boost capacitor connected to the switch group; Wherein, when the switch group is in a first connection state, the battery charges the boost capacitor through the switch group; when the switch group is in a second connection state, the boost capacitor charges the first capacitor through the switch group.

2. The control circuit according to claim 1, wherein the control module comprises: A control unit, wherein a first end of the control unit is connected to the battery and the load respectively, a second end of the control unit is connected to the reference voltage, and a third end of the control unit is connected to the boost module; a first switch, wherein a first end of the first switch is connected to a fourth end of the control unit, a second end of the first switch is connected to the battery and the load respectively, and a third end of the first switch is connected to the first capacitor and the boost module respectively; Wherein, when the operating temperature is less than a first threshold and the battery voltage is greater than or equal to the reference voltage, the control unit controls the first switch to be disconnected so that the battery and the boost module charge the first capacitor; Afterwards, when the operating temperature is less than the first threshold and the battery voltage is less than the reference voltage, the control unit controls the first switch to be turned on, so that the first capacitor supplies power to the load.

3. The control circuit according to claim 2, wherein the control unit comprises: A temperature sensor, wherein the temperature sensor is used to detect the operating temperature of the electronic device; A voltage comparator, wherein a positive input terminal of the voltage comparator is connected to the positive electrode of the battery, and an inverting input terminal of the voltage comparator is connected to the reference voltage; A controller, wherein a first input terminal of the controller is connected to an output terminal of the temperature sensor, a second input terminal of the controller is connected to an output terminal of the voltage comparator, and an output terminal of the controller is respectively connected to a first terminal of the first switch and the boost module.

4. The control circuit according to claim 3, characterized in that: The controller is a logic gate circuit.

5. The control circuit according to claim 4, characterized in that: The logic gate circuit is an XOR gate circuit.

6. The control circuit according to claim 2, characterized in that: The first switch is a field effect transistor switch.

7. The control circuit according to claim 1, characterized in that: The switch group includes: a second switch, wherein a first end of the second switch is connected to the first capacitor, and a second end of the second switch is connected to the battery; a third switch, wherein a first end of the third switch is connected to a second end of the second switch and the battery respectively; a fourth switch, wherein a first end of the fourth switch is connected to the first end of the second switch and the first capacitor respectively, and a second end of the fourth switch is connected to the second end of the third switch; a fifth switch, wherein a first end of the fifth switch is connected to the battery, and a second end of the fifth switch is grounded; The boost capacitor comprises: a second capacitor, wherein a first end of the second capacitor is connected to the control end of the second switch, and a second end of the second capacitor is connected to the control end of the third switch; A third capacitor, wherein a first end of the third capacitor is connected to the control end of the fourth switch, and a second end of the third capacitor is connected to the control end of the fifth switch.

8. The control circuit according to claim 1, characterized in that: The switch group includes: a second switch, wherein a first end of the second switch is connected to the battery; a third switch, wherein a first end of the third switch is respectively connected to the battery and a first end of the second switch; a fourth switch, a first end of the fourth switch being connected to a second end of the second switch; a fifth switch, wherein a first end of the fifth switch is connected to a second end of the third switch, and a second end of the fifth switch is grounded; The boost capacitor comprises: A second capacitor, wherein a first end of the second capacitor is respectively connected to a second end of the second switch and a first end of the fourth switch, and a second end of the second capacitor is respectively connected to a second end of the third switch and a first end of the fifth switch.

9. An electronic device, characterized in that: include: A control circuit as claimed in any one of claims 1 to 8.

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