Control circuit and control system

Abstract

The present application discloses a control circuit and control system. The circuit includes: a switch control module, a processor control module, a power output control module, a power supply module and an overcurrent protection control module. The output end of the processor control module is connected to the input end of the power output control module to control the on or off of the power output control module. The target output port of the power output control module and the input end of the overcurrent protection control module are both connected to the output end of the battery; the output end of the switch control module is connected to the input end of the processor control module, and the switch control module controls the start or shut down of the processor control module by closing or opening the switch key; the output end of the power supply module and the power input end of the processor control module are both connected to the first voltage source; the driving end of the overcurrent protection control module is connected to the driving end of the processor control module. The present application solves the technical problem of large current consumption when battery-powered products are in standby mode.

Description

Technical Field

[0001] The present application relates to the technical field of circuit design and battery management, and in particular to a control circuit and a control system. Background Art

[0002] With the rapid development of science and technology, more and more electronic devices such as smartphones, tablets, smart watches, smart home devices, etc., rely on battery power. In daily use, these devices are in standby mode for a considerable period of time in addition to active states (such as calls, games, video playback, etc.). However, the current consumption of many products in standby mode is not low. Some products do not fully consider low-power design during hardware design, resulting in more circuits remaining active in standby mode, thereby consuming a large amount of current. Being in standby mode for a long time, especially when the standby current is large, will accelerate the loss of battery capacity. The reduction in battery capacity means that the endurance of the device is reduced and it needs to be charged more frequently. The battery has a limited number of charge and discharge cycles. Frequent charging and long-term high current consumption will accelerate the aging process of the battery and shorten its service life.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present application provide a control circuit and a control system to at least solve the technical problem that the battery life is shortened or even damaged due to the large current consumption of the battery-powered product when in standby mode.

[0005] According to one aspect of an embodiment of the present application, a control circuit is provided, comprising: a switch control module, a processor control module, a power output control module, a power supply module and an overcurrent protection control module, wherein the output end of the processor control module is connected to the input end of the power output control module, for controlling the on or off of the power output control module, the target output port of the power output control module and the input end of the overcurrent protection control module are both connected to the output end of a battery, and the power output control module and the overcurrent protection control module are used to control the output of a power signal of the battery; the output end of the switch control module is connected to the input end of the processor control module, and the switch control module controls the start or shut down of the processor control module by closing or opening a switch key to control the output of the battery; the output end of the power supply module and the power input end of the processor control module are both connected to a first voltage source; the driving end of the overcurrent protection control module is connected to the driving end of the processor control module, for controlling the processor control module to disconnect when the current of the load device is greater than a preset threshold.

[0006] Optionally, the switch control module includes a switch key, a first transistor and multiple resistors, the emitter of the first transistor is grounded, the collector of the first transistor is connected to the first voltage source through the first resistor, the output end of the collector of the first transistor is connected to the input end of the processor control module, the base of the first transistor is connected in parallel with the second resistor and then grounded, which is used to filter the current passing through the first transistor, the base of the first transistor is connected in parallel with the third resistor and then connected to the second voltage source through the fourth resistor, and the connection between the third resistor and the fourth resistor is connected to the target input port through the switch key.

[0007] Optionally, the processor control module includes a first chip and a first capacitor, the power input terminal of the first chip is connected in parallel with the first capacitor and then grounded, the power input terminal of the first chip is connected to the first voltage source, and the input terminal of the first chip is connected to the output terminal of the switch control module.

[0008] Optionally, the power output control module includes a second triode, a MOS tube, a second capacitor and multiple resistors, the input end of the power output control module is connected to the base of the second triode through a fifth resistor, the base of the second triode is also connected to a sixth resistor and then grounded, for filtering the current passing through the second triode, the emitter of the second triode is grounded, the collector of the second triode is connected to the gate of the MOS tube through a seventh resistor, the drain of the MOS tube is connected to the gate of the MOS tube through an eighth resistor in parallel, the drain of the MOS tube is connected to the positive electrode of the battery, the source of the MOS tube is connected to the negative electrode of the battery, the source of the MOS tube is connected in parallel with the second capacitor and then grounded, for filtering the current passing through the MOS tube.

[0009] Optionally, the power supply module includes a second chip, multiple capacitors and multiple diodes, the first port of the second chip is grounded through a third capacitor, the first port is respectively connected to the cathode of the first diode and the cathode of the second diode, the anode of the first diode is connected to the second voltage source, the anode of the second diode is connected to the target output port, the second port of the second chip is grounded through a fourth capacitor, and the second port is also connected to the first voltage source.

[0010] Optionally, the overcurrent protection control module includes an amplifier circuit and a filter circuit, the amplifier circuit includes a third chip and multiple resistors, the first input end of the third chip is connected to the target output port, the target output port supplies power to the third chip, the first input end of the third chip is grounded through a fifth capacitor, the second input end of the third chip is connected to one end of the ninth resistor, the third port of the third chip is connected to one end of the tenth resistor, the other end of the ninth resistor is connected to the other end of the tenth resistor through an eleventh resistor, the other end of the tenth resistor is connected to the load output end, the other end of the ninth resistor is connected to the target output port, one end of the ninth resistor and one end of the tenth resistor are connected through a sixth capacitor, and the output end of the third chip is connected to the filter circuit to form a driving end of the overcurrent protection control module.

[0011] According to another aspect of an embodiment of the present application, a control system is also provided, including: the above-mentioned control circuit and an external device, wherein the output interface of the control circuit is connected to the external device for controlling the power on and off of the external device.

[0012] According to another aspect of the embodiment of the present application, a control method is also provided, which is applied to the processor control module in the above-mentioned control circuit, including: detecting the battery power when the battery is in standby mode; determining the power level corresponding to the battery based on the value range of the battery power; determining the number of disabled power-consuming devices corresponding to the power level, wherein the disabled power-consuming devices are devices in external devices connected to the battery that are prohibited from using the battery power when the battery is in standby mode, and the power level is inversely proportional to the number of disabled power-consuming devices.

[0013] Optionally, the method also includes: determining a power-off priority of each external device connected to the battery; sorting the power-off priorities in descending order to obtain a first power-off priority sequence; selecting a corresponding number of target power-off priority sequences from the first power-off priority sequence based on the number of disabled power-consuming devices; and determining the external devices corresponding to the target power-off priority sequences as disabled power-consuming devices.

[0014] Optionally, determining the power-off priority of each external device connected to the battery includes: obtaining the usage frequency and average power consumption of the target external device connected to the battery, wherein the target external device is any external device among all external devices connected to the battery; determining a first weight corresponding to the usage frequency, and determining a second weight corresponding to the average power consumption; determining the power-off priority of the target external device based on the first weight, the usage frequency, the second weight, and the average power consumption.

[0015] The control circuit of the embodiment of the present application includes: a switch control module, a processor control module, a power output control module, a power supply module and an overcurrent protection control module, wherein the output end of the processor control module is connected to the input end of the power output control module, so as to control the on or off of the power output control module, the target output port of the power output control module and the input end of the overcurrent protection control module are both connected to the output end of the battery, and the power output control module and the overcurrent protection control module are used to control the output of the power signal of the battery; the output end of the switch control module is connected to the input end of the processor control module, and the switch control module controls the start or shut down of the processor control module by closing or opening the switch key to control the output of the battery; the output end of the power supply module and the power input end of the processor control module are both connected to the first voltage source; the driving end of the overcurrent protection control module is connected to the driving end of the processor control module, and is used to control the processor control module to disconnect when the current of the load device is greater than the preset threshold value to prevent the circuit and the device from being damaged; by connecting multiple control modules to control the switching of the power output voltage, it is possible to prevent the battery from generating current when in standby mode, thereby solving the technical problem of shortened battery life or even damage caused by large current consumption of battery-powered products when in standby mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 is a schematic structural diagram of an optional control circuit according to an embodiment of the present application;

[0018] Figure 2 is a structural schematic diagram of a control system according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a connection structure of a switch control module according to an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a connection structure of a power output control module according to an embodiment of the present application;

[0021] Figure 5 is a schematic diagram of a connection structure of a power supply module according to an embodiment of the present application;

[0022] Figure 6 is a schematic diagram of a connection structure of a processor control module according to an embodiment of the present application;

[0023] Figure 7 is a schematic diagram of a connection structure of an overcurrent protection control module according to an embodiment of the present application;

[0024] Figure 8 is a schematic diagram of a connection structure of a display circuit according to an embodiment of the present application;

[0025] Fig. 9 is a schematic diagram of a connection structure of a battery according to an embodiment of the present application;

[0026] Fig.10 It is a flow chart of a control method according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Figure 1 is a schematic diagram of an optional control circuit according to an example of the present application, such as Figure 1 As shown, the control circuit includes: an overcurrent protection control module 10 , a switch control module 11 , a processor control module 12 , a power output control module 13 , and a power supply module 14 .

[0030] Among them, the output end of the processor control module 12 is connected to the input end of the power output control module 13, which is used to control the on or off of the power output control module 13. The target output port of the power output control module 13 and the input end of the overcurrent protection control module 10 are both connected to the output end of the battery 15 (such as BATOUT, i.e., the target output port hereinafter) , The power output control module 13 and the overcurrent protection control module 10 are used to control the output of the power signal of the battery 15; the output end of the switch control module 11 is connected to the input end of the processor control module 12, and the switch control module 11 controls the start or shut down of the processor control module 12 by closing or opening the switch key L1 to control the output of the battery 15; the output end of the power supply module 14 and the power input end of the processor control module 12 are both connected to the first voltage source 16, the overcurrent protection control module 10 is connected to the target output port of the power output control module 13, and the driving end (such as DRIV end) of the overcurrent protection control module 10 is connected to the driving end (such as DRIV end) of the processor control module 12, which is used to control the processor control module to disconnect when the current of the load device is greater than the preset threshold.

[0031] exist Figure 1 The control circuit shown is based on Figure 2 A schematic diagram of the structure of a control system is shown. Figure 3-9 The circuit connection structure diagram of each part in the control circuit is shown below. Figure 3-9 The specific structure and function of each module of the control circuit provided in the example of this application are explained.

[0032] Optionally, Figure 3 is a schematic diagram of a connection structure of a switch control module 11 according to an embodiment of the present application, such as Figure 3 As shown, the switch control module 11 includes a switch key L1, a first transistor Q3 and multiple resistors, the emitter of the first transistor Q3 is grounded, the collector of the first transistor Q3 is connected to the first voltage source +5V through the first resistor R6, the output end K1 of the collector of the first transistor Q3 is connected to the input end of the processor control module 12, the base of the first transistor Q3 is connected in parallel with the second resistor R11 and then grounded, which is used to filter the current passing through the first transistor Q3, the base of the first transistor Q3 is connected in parallel with the third resistor R9 and then connected to the second voltage source VDD1 through the fourth resistor R8, and the connection between the third resistor R9 and the fourth resistor R8 is connected to the target input port BATIN through the switch key L1.

[0033] It should be noted that the first transistor can be an NPN transistor. When the switch button L1 is pressed, the circuit is turned on and the corresponding VDD1 has a voltage. At this time, the first transistor Q3 is turned on and the collector output terminal outputs a control signal K1 that is a high level signal. The target input port BATIN is connected to the positive electrode of the battery 15.

[0034] When the switch key L1 is turned on, the battery power supply circuit is turned on, so that the battery energy can be output. The battery power supply circuit includes an overcurrent protection control module 10, a switch control module 11, a processor control module 12, a power supply module 14, and a power output control module 13. When the switch key L1 is turned off, the battery power supply circuit is disconnected, thereby preventing the loss of battery energy.

[0035] Optionally, Figure 4 is a schematic diagram of a connection structure of a power output control module 13 according to an embodiment of the present application, such as Figure 4 As shown, the power output control module 13 includes a second triode Q2, a MOS tube Q1, a second capacitor C2 and multiple resistors. The input terminal POWER_ON of the power output control module 13 is connected to the base of the second triode Q2 through a fifth resistor R7. The base of the second triode Q2 is also connected to a sixth resistor R10 and then grounded, which is used to filter the current passing through the second triode Q2. The emitter of the second triode is grounded, the collector of the second triode Q2 is connected to the gate of the MOS tube Q1 through a seventh resistor R5, the drain of the MOS tube Q1 is connected to the gate of the MOS tube Q1 through a parallel eighth resistor R1, the drain of the MOS tube Q1 is connected to the target input port BATIN, the source of the MOS tube Q1 is connected to the target output port BATOUT, the source of the MOS tube Q1 is connected in parallel with the second capacitor C2 and then grounded, which is used to filter the current passing through the MOS tube Q1.

[0036] It should be noted that when the first chip U1 (ie, the first chip U1 in the processor control module 12) outputs POWER_ON as a high level, the second transistor Q2 will be turned on, and after the source and drain of the MOS tube Q1 are turned on, the voltages of BATIN and BATOUT are the same.

[0037] Optionally, Figure 5 is a schematic diagram of a connection structure of a power supply module 14 according to an embodiment of the present application, such as Figure 5As shown, the power supply module 14 includes a second chip WD1, multiple capacitors and multiple diodes. The first port VIN of the second chip WD1 is grounded through the third capacitor C6, the first port VIN is connected to the cathode of the first diode D2 and the cathode of the second diode D2, the anode of the first diode D2 is connected to the second voltage source VDD1, the anode of the second diode D1 is connected to the target output port BATOUT, the second port OUT of the second chip WD1 is grounded through the fourth capacitor C5, and the second port is also connected to the first voltage source +5V.

[0038] It should be noted that the power supply module 14 is equivalent to a voltage stabilizing circuit, which ensures that the voltage of the target output port BATOUT, i.e., the battery output, can remain stable within a predetermined range when the load current changes due to input voltage fluctuations. Specifically, when the switch key L1 of the switch control module 11 is pressed, the circuit is turned on, and VDD1 has a voltage. At this time, BATOUT will output the battery voltage stably through the overcurrent protection control module to supply energy to related equipment. When the switch key L1 is not pressed, BATOUT outputs 0, the battery does not supply energy, and no current is generated. When the battery 15 is in power supply or standby mode, the power supply module 14 makes the working process of the battery 15 more stable under corresponding conditions.

[0039] Optionally, Figure 6 is a schematic diagram of a connection structure of a processor control module 12 according to an embodiment of the present application, such as Figure 6 As shown, the processor control module 12 includes a first chip U1 and a first capacitor C1. The power input terminal VDD of the first chip U1 is connected in parallel with the first capacitor C1 and then grounded. The power input terminal VDD of the first chip U1 (i.e., port 15) is connected to the first voltage source 16 (i.e., +5V). The input terminal (i.e., port 1) of the first chip U1 is connected to the output terminal K1 of the switch control module 11. The driving terminal (i.e., port 20) of the first chip U1 is connected to the output terminal DRIV of the overcurrent protection control module 10. The output terminal (i.e., port 13) of the first chip U1 outputs a POWER ON signal.

[0040] It should be noted that when the output terminal K1 of the switch control module 11 is at a high level, the first chip U1 outputs a POWER_ON high level signal, and when DRIV is at a high level, the POWER ON output by the first chip U1 is controlled to be at a low level.

[0041] The first chip U1 may be a MCU control chip of model JZ2605-20L.

[0042] Figure 71 is a schematic diagram of the connection structure of an overcurrent protection control module 10 according to an embodiment of the present application. The overcurrent protection control module includes an amplifier circuit and a filter circuit. The amplifier circuit includes a third chip U2 and multiple resistors. The first input terminal V+ (i.e., port 3) V+ of the third chip U2 is connected to the target output port BATOUT. The target output port BATOUT supplies power to the third chip U2. The first input terminal V+ (i.e., port 3) of the third chip U2 is grounded through a fifth capacitor C3. The second input terminal IN+ (i.e., port 4) of the third chip U2 is connected to one end of the ninth resistor R12. The third port IN- (i.e., port 5) of the third chip U2 is connected to one end of the tenth resistor R13. The other end of the ninth resistor R12 is connected to the other end of the tenth resistor R13 through an eleventh resistor R14. The other end of the tenth resistor R13 is connected to the load output terminal LOAD OUT is connected, the other end of the ninth resistor R12 is connected to the target output port BATOUT, one end of the ninth resistor R12 and one end of the tenth resistor R13 are connected through the sixth capacitor C4, and the output end OUT (i.e., port 6) of the third chip U2 is connected to the filter circuit (composed of R15 and R16) to form the driving end DRIV of the overcurrent protection control module 10.

[0043] Among them, when the load is too large, the load output terminal LOAD OUT outputs a larger current. At this time, the voltage across the eleventh resistor R14 is small. After the third chip U2 detects that the voltage is small, it will start the overcurrent protection. The signal is amplified by the third chip U2, and the DRIV signal is output through the OUT port to control the output of the POWER ON of the processor control module 12 to a low level, thereby disconnecting the power supply of the battery.

[0044] Optionally, Figure 8 is a schematic diagram of a connection structure of a display circuit 17 according to an embodiment of the present application, such as Figure 7 As shown, the control circuit also includes a display circuit 17, and the display circuit 17 is connected to the port of the processor control module 12. The display circuit includes a plurality of display branches, each display branch includes a resistor and a diode, one end of each display branch is connected to the first voltage source +5V, and the other end of each display branch is connected to different ports of the first chip U1 in the processor control module 12.

[0045] It should be noted that the display circuit can be composed of a +5V voltage source, three resistors and three light-emitting diodes, wherein the resistor R2 is connected to the anode of the light-emitting diode D3, i.e., the LED3 circuit, the resistor R3 is connected to the anode of the light-emitting diode D4, i.e., the LED2 circuit, and the resistor R4 is connected to the anode of the light-emitting diode D5, i.e., the LED1 circuit. The circuits where the three resistors are located are connected in parallel to the +5V voltage source, and the cathodes of the light-emitting diodes D3, D4, and D5 are connected to the P64, P63, and P62 ports of the first chip U1, respectively. Because of the unidirectional conductivity of the light-emitting diode, when the input K1 of the first chip U1 is at a high level, the first chip U1 is started, and at this time, the P62, P63, and P64 ports of the chip are at a low level, and the light-emitting diodes light up, indicating that the battery outputs a normal voltage.

[0046] It should be noted that, through LOAD OUT, the power signal of BATOUT can be brought out so as to be connected to these external devices or modules, thereby forming a complete power loop so that electric energy can flow through the components that need power supply.

[0047] Optionally, Fig. 9 is a schematic diagram of a connection structure of a battery 15 according to an embodiment of the present application, such as Fig. 9 As shown, the control circuit further includes a battery 15 (ie, BT1 ), a positive electrode of the battery 15 is connected to the target input port BATIN, and a negative electrode of the battery 15 is grounded.

[0048] The embodiment of the present application also provides a control method, which is applied to the processor control module in the above control circuit. Fig.10 is a flow chart of a control method according to an embodiment of the present application, and the following is combined with Fig.10 The control method is explained.

[0049] When the switch in the switch control module 11 is closed, the battery will be controlled to supply power to the processor control module, and the processor control module will start. After starting, the electronic device where the control circuit is located is in standby mode. In order to prevent the waste of power in the standby state, a power saving strategy can be set in the processor control module: first, the mapping relationship between the battery power and the power level, as well as the mapping relationship between the power level and the number of disabled power-consuming devices are maintained in the processor control module; the power of the battery in the standby state is detected; the value range of the current battery power is determined according to the above mapping relationship, and the power level corresponding to the value range is determined, wherein the larger the power level, the larger the value range of the power (that is, the larger the maximum value in the value range); the number of disabled power-consuming devices corresponding to the power level is determined, wherein the larger the power level, the smaller (fewer) the number of disabled power-consuming devices.

[0050] exist Fig.10In the control method shown, disabling power-consuming devices can be achieved in the following manner: first, determining the power-off priority of each external device connected to the battery; then sorting the power-off priorities in descending order to obtain a first power-off priority sequence; based on the number of disabled power-consuming devices, selecting a corresponding number of target power-off priority sequences from the first power-off priority sequence; and determining the external devices corresponding to the target power-off priority sequences as disabled power-consuming devices.

[0051] Specifically, the above-mentioned process of determining the power-off priority of each external device connected to the battery can be implemented in the following manner: obtain the usage frequency and average power consumption of the target external device connected to the battery, wherein the target external device is any external device among all the external devices connected to the battery; then determine a first weight corresponding to the usage frequency, and determine a second weight corresponding to the average power consumption; determine the power-off priority of the target external device based on the first weight, usage frequency, second weight, and average power consumption.

[0052] Optionally, when the current battery power is less than a preset threshold, a prompt message is generated, which is used to prompt the switch key in the switch control module to be turned on to control the power supply of all power-consuming devices that are in the working state when the battery is in the standby state. The prompt message can be implemented by an alarm circuit 40, which can be a prompt light, which is connected to the processor control module 12.

[0053] The embodiment of the present application also provides a control system, including: the above control circuit and an external device, wherein the output interface of the control circuit is connected to the external device and is used to control the power on and off of the external device. Figure 2 The connection structure of the control system is explained.

[0054] Figure 2 is a schematic diagram of a control system according to an example of the present application, such as Figure 2As shown, the control circuit includes: an overcurrent protection control module 10, a switch control module 11, a processor control module 12, a power output control module 13 and a power supply module 14, a battery 15, a first voltage source 16, and a display circuit 17. Among them, the output end of the processor control module 12 is connected to the input end of the power output control module 13, and is used to control the on or off of the power output control module 13. The target output port of the power output control module and the input end of the overcurrent protection control module are both connected to the output end of the battery. The power output control module and the overcurrent protection control module are used to control the output of the power signal of the battery; the output end of the switch control module 11 is connected to the input end of the processor control module 12, and the switch control module 11 controls the start or shut down of the processor control module 12 by closing or opening the switch key L1 to control the output of the battery 15; the output end of the power supply module 14 and the power input end of the processor control module 12 are both connected to the first voltage source 16. The following is combined Figure 3-9 The specific structure and function of each module of the control system provided in this application example are explained.

[0055] Optionally, the first voltage source 16 may be a +5V voltage source.

[0056] Alternatively, if Figure 3 As shown, the switch control module 11 includes a switch key L1, a first transistor Q3 and multiple resistors, the emitter of the first transistor Q3 is grounded, the collector of the first transistor Q3 is connected to the first voltage source 16 (i.e., +5V) through the first resistor R6, the output end K1 of the collector of the first transistor Q3 is connected to the input end of the processor control module 12, the base of the first transistor Q3 is connected in parallel with the second resistor R11 and then grounded, which is used to filter the current passing through the first transistor Q3, the base of the first transistor Q3 is connected in parallel with the third resistor R9 and then connected to the second voltage source VDD1 through the fourth resistor R8, and the connection between the third resistor R9 and the fourth resistor R8 is connected to the target input port BATIN through the switch key L1.

[0057] It should be noted that the first transistor can be an NPN transistor. When the switch button L1 is pressed, the circuit is turned on and the corresponding VDD1 has a voltage. At this time, the first transistor Q3 is turned on and the collector output terminal outputs a control signal K1 that is a high level signal. The target input port BATIN is connected to the positive electrode of the battery 15.

[0058] When the switch key L1 is turned on, the battery power supply circuit is turned on, so that the battery energy can be output. The battery 15 power supply circuit includes an overcurrent protection control module 10, a switch control module 11, a processor control module 12, a power output control module 13, and a power supply module 14. When the switch key L1 is turned off, the battery power supply circuit is disconnected, thereby preventing the loss of battery energy.

[0059] Alternatively, if Figure 4 As shown, the power output control module 13 includes a second triode Q2, a MOS tube Q1, a second capacitor C2 and multiple resistors. The input terminal POWER_ON of the power output control module 13 is connected to the base of the second triode Q2 through a fifth resistor R7. The base of the second triode Q2 is also connected to a sixth resistor R10 and then grounded, which is used to filter the current passing through the second triode Q2. The emitter of the second triode is grounded, the collector of the second triode Q2 is connected to the gate of the MOS tube Q1 through a seventh resistor R5, the drain of the MOS tube Q1 is connected to the gate of the MOS tube Q1 through a parallel eighth resistor R1, the drain of the MOS tube Q1 is connected to the target input port BATIN, the source of the MOS tube Q1 is connected to the target output port BATOUT, the source of the MOS tube Q1 is connected in parallel with the second capacitor C2 and then grounded, which is used to filter the current passing through the MOS tube Q1.

[0060] It should be noted that, when the first chip U1 outputs POWER_ON at a high level, the second transistor Q2 will be turned on, and after the source and drain of the MOS tube Q1 are turned on, the voltages of BATIN and BATOUT are the same.

[0061] Figure 5 is a schematic diagram of a connection structure of a power supply module 14 according to an embodiment of the present application, such as Figure 5 As shown, the power supply module 14 includes a second chip WD1, multiple capacitors and multiple diodes. The first port VIN of the second chip WD1 is grounded through the third capacitor C6, the first port VIN is connected to the cathode of the first diode D2 and the cathode of the second diode D1, the anode of the first diode D2 is connected to the second voltage source VDD1, the anode of the second diode D1 is connected to the target output port BATOUT, the second port OUT of the second chip WD1 is grounded through the fourth capacitor C5, and the second port is also connected to the first voltage source +5V.

[0062] It should be noted that the power supply module 14 is equivalent to a voltage stabilizing circuit, which ensures that the voltage of the target output port BATOUT, i.e., the battery output, can remain stable within a predetermined range when the load current changes due to input voltage fluctuations. Specifically, when the switch key L1 of the switch control module 11 is pressed, the circuit is turned on, and VDD1 has a voltage. At this time, BATOUT will output the battery voltage stably through the overcurrent protection control module to supply energy to related equipment. When the switch key L1 is not pressed, BATOUT outputs 0, the battery does not supply energy, and no current is generated. When the battery 15 is in power supply or standby mode, the power supply module 14 makes the working process of the battery 15 more stable under corresponding conditions.

[0063] Optionally, Figure 6is a schematic diagram of a connection structure of a processor control module 12 according to an embodiment of the present application, such as Figure 6 As shown, the processor control module 12 includes a first chip U1 and a first capacitor C1. The power input terminal VDD of the first chip U1 is connected in parallel with the first capacitor C1 and then grounded. The power input terminal VDD of the first chip U1 (i.e., port 15) is connected to the first voltage source 16 (i.e., +5V). The input terminal (i.e., port 1) of the first chip U1 is connected to the output terminal K1 of the switch control module 11. The driving terminal (i.e., port 20) of the first chip U1 is connected to the output terminal DRIV of the overcurrent protection control module 10. The output terminal (i.e., port 13) of the first chip U1 outputs a POWER ON signal.

[0064] It should be noted that when the output terminal K1 of the switch control module 11 is at a high level, the first chip U1 outputs a POWER_ON high level signal, and when DRIV is at a high level, the POWER ON output by the first chip U1 is controlled to be at a low level.

[0065] The first chip U1 may be a MCU control chip of model JZ2605-20L.

[0066] Figure 7 1 is a schematic diagram of the connection structure of an overcurrent protection control module 10 according to an embodiment of the present application. The overcurrent protection control module includes an amplifier circuit and a filter circuit. The amplifier circuit includes a third chip U2 and multiple resistors. The first input terminal (i.e., port 3) V+ of the third chip U2 is connected to the target output port BATOUT. The target output port BATOUT supplies power to the third chip U2. The first input terminal of the third chip U2 is grounded through the fifth capacitor C3. The second input terminal IN+ (i.e., port 4) of the third chip U2 is connected to one end of the ninth resistor R12. The third port IN- (i.e., port 5) of the third chip U2 is connected to one end of the tenth resistor R13. The other end of the ninth resistor R12 is connected to the other end of the tenth resistor R13 through the eleventh resistor R14. The other end of the tenth resistor R13 is connected to the load output terminal LOAD OUT is connected, the other end of the ninth resistor R12 is connected to the target output port BATOUT, one end of the ninth resistor R12 and one end of the tenth resistor R13 are connected through the sixth capacitor C4, and the output end OUT (i.e., port 6) of the third chip U2 is connected to the filter circuit (composed of R15 and R16) to form the driving end DRIV of the overcurrent protection control module 10.

[0067] Among them, when the load is too large, the load output terminal LOAD OUT outputs a larger current. At this time, the voltage across the eleventh resistor R14 is small. After the third chip U2 detects that the voltage is small, it will start the overcurrent protection. The signal is amplified by the third chip U2, and the DRIV signal is output through the OUT port to control the output of the POWER ON of the processor control module 12 to a low level, thereby disconnecting the power supply of the battery.

[0068] Optionally, Figure 8 is a schematic diagram of a connection structure of a display circuit 17 according to an embodiment of the present application, such as Figure 7 As shown, the control circuit also includes a display circuit 17, and the display circuit 17 is connected to the port of the processor control module 12. The display circuit includes a plurality of display branches, each display branch includes a resistor and a diode, one end of each display branch is connected to the first voltage source +5V, and the other end of each display branch is connected to different ports of the first chip U1 in the processor control module 12.

[0069] It should be noted that the display circuit can be composed of a +5V voltage source, three resistors and three light-emitting diodes, wherein the resistor R2 is connected to the anode of the light-emitting diode D3. That is, the LED3 circuit, the resistor R3 is connected to the anode of the light-emitting diode D4. That is, the LED2 circuit, the resistor R4 is connected to the anode of the light-emitting diode D5, that is, the LED1 circuit, the circuit where the three resistors are located is connected in parallel to the +5V voltage source, and the cathodes of the light-emitting diodes D3, D4, and D5 are respectively connected to the P64, P63, and P62 ports of the first chip U1. Because of the unidirectional conductivity of the light-emitting diode, when the input K1 of the first chip U1 is at a high level, the first chip U1 is started, and at this time, the P62, P63, and P64 ports of the chip are at a low level, and the light-emitting diodes light up, indicating that the battery outputs a normal voltage.

[0070] Alternatively, if Fig. 9 As shown, the control circuit further includes a battery 15 (ie, BT1 ), a positive electrode of the battery 15 is connected to the target input port BATIN, and a negative electrode of the battery 15 is grounded.

[0071] It should be noted that Figure 2 The control circuit in the control system shown is Figure 1 The control circuit shown is the same, so Figure 1 The explanations of the control circuit in the Figure 2 The control circuit in the control system shown will not be described in detail here.

[0072] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A control circuit, characterized in that: include: A switch control module, a processor control module, a power output control module, a power supply module and an overcurrent protection control module, wherein: The output end of the processor control module is connected to the input end of the power output control module, and is used to control the on or off of the power output control module. The target output port of the power output control module and the input end of the overcurrent protection control module are both connected to the output end of the battery. The power output control module and the overcurrent protection control module are used to control the output of the power signal of the battery. The output end of the switch control module is connected to the input end of the processor control module, and the switch control module controls the start or shut down of the processor control module by closing or opening a switch key to control the output of the battery; The output terminal of the power supply module and the power input terminal of the processor control module are both connected to a first voltage source; The driving end of the overcurrent protection control module is connected to the driving end of the processor control module, and is used to control the processor control module to disconnect when the current of the load device is greater than a preset threshold; The overcurrent protection control module includes an amplifier circuit and a filter circuit, the amplifier circuit includes a third chip and a plurality of resistors, the first input end of the third chip is connected to the target output port, the target output port supplies power to the third chip, the first input end of the third chip is grounded through a fifth capacitor, the second input end of the third chip is connected to one end of a ninth resistor, the third port of the third chip is connected to one end of a tenth resistor, the other end of the ninth resistor is connected to the other end of the tenth resistor through an eleventh resistor, the other end of the tenth resistor is connected to a load output end, the other end of the ninth resistor is connected to the target output port, one end of the ninth resistor and one end of the tenth resistor are connected through a sixth capacitor, and the output end of the third chip is connected to the filter circuit to form a driving end of the overcurrent protection control module; When the switch in the switch control module is closed and the electronic device where the control circuit is located is in standby mode, the processor control module executes a power saving strategy, including: obtaining the battery power, determining the power level to which the battery power belongs based on the battery power; and determining the number of disabled power-consuming devices corresponding to the power level.

2. The control circuit according to claim 1, characterized in that: The switch control module includes the switch key, a first transistor and multiple resistors, the emitter of the first transistor is grounded, the collector of the first transistor is connected to the first voltage source through the first resistor, the output end of the collector of the first transistor is connected to the input end of the processor control module, the base of the first transistor is connected in parallel with the second resistor and then grounded, which is used to filter the current passing through the first transistor, the base of the first transistor is connected in parallel with the third resistor and then connected to the second voltage source through the fourth resistor, and the connection between the third resistor and the fourth resistor is connected to the target input port through the switch key.

3. The control circuit according to claim 1, characterized in that: The processor control module includes a first chip and a first capacitor, the power input end of the first chip is connected in parallel with the first capacitor and then grounded, the power input end of the first chip is connected to the first voltage source, and the input end of the first chip is connected to the output end of the switch control module.

4. The control circuit according to claim 2, characterized in that: The power output control module includes a second triode, a MOS tube, a second capacitor and multiple resistors. The input end of the power output control module is connected to the base of the second triode through a fifth resistor. The base of the second triode is also connected to a sixth resistor and then grounded, so as to filter the current passing through the second triode. The emitter of the second triode is grounded, the collector of the second triode is connected to the gate of the MOS tube through a seventh resistor, the drain of the MOS tube is connected to the gate of the MOS tube through an eighth resistor in parallel, the drain of the MOS tube is connected to the target input port, the source of the MOS tube is connected to the target output port, the source of the MOS tube is connected to the second capacitor in parallel and then grounded, so as to filter the current passing through the MOS tube.

5. The control circuit according to claim 2, characterized in that: The power supply module includes a second chip, multiple capacitors and multiple diodes. The first port of the second chip is grounded through a third capacitor, the first port is connected to the cathode of the first diode and the cathode of the second diode respectively, the anode of the first diode is connected to the second voltage source, the anode of the second diode is connected to the target output port, the second port of the second chip is grounded through a fourth capacitor, and the second port is also connected to the first voltage source.

6. A control system, characterized in that: include: The control circuit and external device according to any one of claims 1 to 5, wherein the output interface of the control circuit is connected to the external device for controlling the power on and off of the external device.

7. A control method, characterized in that: A processor control module used in a control circuit according to any one of claims 1 to 5, comprising: Detect the battery power when the battery is in standby mode; Determining a power level of the battery according to a value range of the battery power; The number of disabled power-consuming devices corresponding to the power level is determined, wherein the disabled power-consuming devices are devices in external devices connected to the battery that are prohibited from using battery power when the battery is in a standby state, and the power level is inversely proportional to the number of disabled power-consuming devices.

8. The method according to claim 7, characterized in that The method further comprises: determining a power-off priority for each external device connected to the battery; After sorting the power-off priorities in descending order, a first power-off priority sequence is obtained; According to the number of the disabled power-consuming devices, selecting a corresponding number of target power-off priority sequences from the first power-off priority sequence; The external devices corresponding to the target power-off priority sequence are determined as the disabled power-consuming devices.

9. The method according to claim 8, characterized in that Determine the power-off priority for each external device connected to the battery, including: Acquire the usage frequency and average power consumption of a target external device connected to the battery, wherein the target external device is any one of all external devices connected to the battery; determining a first weight corresponding to the usage frequency, and determining a second weight corresponding to the average power consumption; A power-off priority of the target external device is determined according to the first weight, the usage frequency, the second weight, and the average power consumption.

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