Switching circuit and device adaptive to power bank

Abstract

The utility model relates to the technical field of power bank power supply, in particular to a switching circuit and device adaptive to a power bank, the switching circuit adaptive to the power bank comprises a trigger module, a detection control module and a switching module, the trigger module comprises a trigger switch, and the detection control module is connected with the switching module according to on-off of the trigger switch. Adjusting a control level signal output to the input end of the detection control module; the detection control module is used for sending a switch control signal to the switch module through the output end of the detection control module according to the control level signal; and the switch module is used for controlling the on-off of the switch module according to the switch control signal so as to control the power supply of the external power bank to the load. The method can achieve the beneficial effects of preventing the power bank from misjudging the power supply demand of the equipment end, and improving the use experience of a user.

Description

Technical Field

[0001] The present application relates to the technical field of power supply of power banks, and in particular to a switch circuit and device adapted for power banks. Background Art

[0002] A power bank is a portable power supply device that can power various electronic devices. However, some devices powered by power banks have some problems. For example, when the device is turned off or enters a low-power state, it is easy to trigger charging shutdown, and when charging shutdown, it is impossible to trigger the power on through the button on the device. This brings inconvenience to the user experience.

[0003] In the prior art, a power bank usually consists of a main control chip and a battery. The main control chip is responsible for controlling the charging and discharging process of the power bank and managing communications with external devices. When a device is connected to the power bank, the main control chip detects the power requirements of the device and provides the corresponding current according to the power requirements of the device. However, when the device is turned off or enters a low-power state, the main control chip may mistakenly believe that the device does not need power, thereby turning off the power output of the power bank. In this case, the user cannot trigger the power on by pressing the button on the device, and can only rely on the button on the power bank to restart the power bank, which will cause inconvenience to the user.

[0004] Based on this, how to prevent the power bank from misjudging the power supply requirements of the device to improve the user experience is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The embodiment of the present application provides a switch circuit adapted to a power bank, which can prevent the power bank from misjudging the power supply demand of the device end, thereby improving the user experience.

[0006] In a first aspect, the present application provides a switch circuit adapted to a power bank: a switch circuit adapted to a power bank, comprising a trigger module, a detection control module, and a switch module, wherein the trigger module comprises an input terminal and an output terminal, the detection control module comprises an input terminal and an output terminal, and the switch module comprises an on-off control terminal, an input terminal, and an output terminal;

[0007] The input end of the trigger module is connected to the power supply end of the external power bank, the output end of the trigger module is connected to the input end of the detection control module, the output end of the detection control module is connected to the on-off control end, the input end of the switch module is connected to the connection between the trigger module and the external power bank, and the output end of the switch module is connected to the load;

[0008] The trigger module includes a trigger switch, which is used to adjust the control level signal output to the input end of the detection control module according to the on-off of the trigger switch;

[0009] The detection control module is used to send a switch control signal to the switch module through the output end of the detection control module according to the control level signal;

[0010] The switch module is used to control the on and off of the switch module according to the switch control signal, so as to control the power supply of the external power bank to the load.

[0011] By adopting the above technical solution, the push switch is a switch used to control the on or off of the load. When the load device is in the off state, the push switch is pressed, and the internal circuit of the trigger module is turned on to generate an excitation current. In this case, the external power bank is activated and turned on. The detection control module will obtain this situation and send a switch control signal to the switch module through its output end to turn on the switch module. At this time, the external power bank can supply power to the load through the turned-on switch module. In this process, since the detection control module will also obtain power from the external power bank as a load, even if the device enters low power consumption mode, the external power bank will still maintain power supply because it detects power demand, thereby avoiding the power bank from misjudging the power demand on the device side, thereby improving the user experience.

[0012] Optionally, the trigger module includes a key switch, a first resistor, a first diode, a second diode and a first resistor group, and the first resistor group includes one or more resistors;

[0013] One end of the key switch is connected to the power supply end of the external power bank, and the other end is connected to one end of the first resistor group, and the other end of the first resistor group is grounded;

[0014] One end of the first resistor is connected to the connection between the external power bank and the key switch, and the other end is connected to the input end of the detection control module and the positive electrode of the first diode, and the negative electrode of the first diode is connected to the connection between the key switch and the first resistor group;

[0015] The connection point between the first diode and the first resistor group is connected to the anode of the second diode, and the cathode of the second diode is connected to the output end of the detection control module and the on-off control end of the switch module.

[0016] By adopting the above technical solution, the first resistor is used for voltage division, the first diode and the second diode are used to ensure the current direction to avoid device damage and current backflow, and the first resistor group is used to form a loop from the external power bank, the first resistor group to the ground when the key switch is pressed, thereby generating an excitation current, and the excitation current is used to activate the power bank to turn on.

[0017] Optionally, the detection control module includes an MCU, and the MCU includes an input terminal and an output terminal;

[0018] The input end of the MCU is connected to the connection point between the first resistor and the first diode, and the input end of the MCU is connected to the connection point between the second diode and the switch module.

[0019] By adopting the above technical solution, detection and corresponding output are performed through MCU. When the excitation current is generated, the MCU detects that the input end is a low-level signal, and sends a high-level signal through the output end, thereby controlling the conduction of the switch module; conversely, the MCU input end detects a high-level signal, and it is converted to a low level through the output end, thereby turning off the switch module.

[0020] Optionally, the detection control module includes a third diode;

[0021] The cathode of the third diode is connected to the connection point between the second diode and the switch module, and the anode of the third diode is connected to the input end of the MCU.

[0022] By adopting the above technical solution and setting the third diode, the current is prevented from flowing back to the MCU through the input terminal of the MCU, thereby preventing the MCU from being damaged, thereby extending the service life of the device and improving the reliability of the circuit.

[0023] Optionally, the switch module includes a first triode, a second resistor, a third resistor and a first MOS tube;

[0024] One end of the second resistor is connected to the connection point between the second diode and the third diode, and the other end is connected to the base of the first transistor, the emitter of the first transistor is grounded, and the collector of the first transistor is connected to one end of the third resistor and the gate of the first MOS transistor;

[0025] The power supply end of the external power bank is connected to the other end of the third resistor and the source of the first MOS tube, and the drain of the first MOS tube is connected to the load.

[0026] By adopting the above technical solution, when the MCU sends a high-level signal, the first transistor is turned on, thereby pulling down the gate of the first MOS tube. Due to the presence of the second resistor, a voltage difference is formed between the source and the gate of the first MOS tube, and the first MOS tube is turned on, thereby turning on the power supply line for the external power bank to supply power to the load device.

[0027] Optionally, the switch module further includes a fourth resistor;

[0028] One end of the fourth resistor is connected to the connection point between the second resistor and the first transistor, and the other end is grounded.

[0029] By adopting the above technical solution, a fourth resistor is used to form a discharge loop to the ground to avoid the electrical signal having nowhere to be discharged and damaging the first transistor when the first transistor is not turned on, thereby protecting the device and increasing its service life, ensuring the reliability of the circuit.

[0030] Optionally, the first resistor group includes a plurality of resistors, and any two resistors among the plurality of resistors are connected in parallel.

[0031] By adopting the above technical solution, the value of the excitation current is adjusted by connecting multiple resistors in parallel. In this embodiment, the power bank is triggered to pass a current of about 50mA, and the current size is determined by the total resistance formed by connecting multiple resistors in parallel in the first resistor group.

[0032] A second aspect of the present application provides a switch device adapted for a power bank, which is equipped with the above-mentioned switch circuit adapted for a power bank.

[0033] To sum up, the beneficial effects of the present application are as follows: the push switch is a switch used to control the on or off of the load. When the load device is in the off state, the push switch is pressed, and the internal circuit of the trigger module is turned on to generate an excitation current. In this case, the external power bank is activated and turned on. The detection control module will obtain this situation and send a switch control signal to the switch module through its output end to turn on the switch module. At this time, the external power bank can supply power to the load through the turned-on switch module. In this process, since the detection control module will also obtain power from the external power bank as a load, even if the device enters low power consumption mode, the external power bank will still maintain power supply because it detects power demand, thereby avoiding the power bank from misjudging the power demand on the device side, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a module connection diagram of a switch circuit adapted for a power bank provided in an embodiment of the present application;

[0035] Figure 2 It is a circuit schematic diagram of a switch circuit adapted for a power bank provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The following examples will help those skilled in the art to further understand the effects of the present application, but are not intended to limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several modifications and improvements may be made without departing from the concept of the present application. These all fall within the scope of protection of the present application.

[0037] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0038] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0039] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0040] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0041] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0042] The present application is further described in detail below in conjunction with the accompanying drawings.

[0043] Reference Figure 1 , Figure 1 It is a module connection diagram of a switch circuit adapted to a power bank provided in an embodiment of the present application, including a trigger module 1, a detection control module 2, and a switch module 3, wherein the trigger module 1 includes an input terminal and an output terminal, the detection control module 2 includes an input terminal and an output terminal, and the switch module 3 includes an on-off control terminal, an input terminal, and an output terminal. The connection relationship between the modules is as follows:

[0044] The input end of the trigger module 1 is connected to the power supply end of the external power bank, the output end of the trigger module 1 is connected to the input end of the detection control module 2, the output end of the detection control module 2 is connected to the on-off control end, the input end of the switch module 3 is connected to the connection between the trigger module 1 and the external power bank, and the output end of the switch module 3 is connected to the load.

[0045] Based on the connection relationship between the above modules, each module is described in detail below in combination with the working principle:

[0046] Regarding the trigger module 1: the trigger module 1 includes a trigger switch, which is used to adjust the control level signal output to the input end of the detection control module 2 according to the on-off of the trigger switch.

[0047] Specifically, the trigger switch can be an on / off control key of an externally connected load device, that is, the circuit provided in this embodiment is triggered when the load device is turned on, and is also cut off when it is turned off. In this embodiment, the trigger module 1 includes a resistor, and the key switch is used to control the external power bank to the ground through the resistor in the trigger module 1, thereby generating an excitation current. On the one hand, the excitation current is used to start the work of the detection control module 2; on the other hand, the detection control module 2 is used to activate the external power bank as a load. The detection control module 2 will sample the trigger module 1 to obtain a control level signal, and the control level signal is used to determine the output of the detection control module 2 to control the on / off of the switch module 3.

[0048] Regarding the detection control module 2: the detection control module 2 is used to send a switch control signal to the switch module through the output end of the detection control module 2 according to the control level signal.

[0049] Specifically, the control level signal includes a low level and a high level. In the present embodiment, an example is given for convenience of explanation. After the detection control module 2 is activated, if the control level signal sampled from the trigger module 1 is a low level, a corresponding switch control signal will be sent to the switch module 3. In the present embodiment, the switch control signal corresponding to the low level control level signal is a high level signal, and vice versa. It will not be elaborated here.

[0050] Regarding the switch module 3: the switch module 3 is used to control the on and off of the switch module 3 according to the switch control signal, so as to control the power supply of the external power bank to the load.

[0051] Specifically, the switch module 3 includes one or more switching devices, including but not limited to transistors, MOS tubes and IGBT tubes, which are not limited in this application, and controls the corresponding switching devices to be turned on and off according to the switch control signal sent by the detection control module 2, thereby controlling whether the power supply line of the external power bank to the load equipment is opened.

[0052] Based on the above module function description, the specific circuit connection structure of each module is further explained. Please refer to Figure 2 , Figure 2 This is a circuit schematic diagram of a switch circuit adapted for a power bank provided in an embodiment of the present application, which is described in detail below:

[0053] The trigger module includes a key switch SW1, a first resistor R1, a first diode D1, a second diode D2 and a first resistor group R11, wherein the first resistor group includes one or more resistors;

[0054] One end of the key switch SW1 is connected to the power supply end of the external power bank, and the other end is connected to one end of the first resistor group R11, and the other end of the first resistor group R11 is grounded;

[0055] One end of the first resistor R1 is connected to the connection between the external power bank and the key switch SW1, and the other end is connected to the input end of the detection control module 2 and the positive electrode of the first diode D1, and the negative electrode of the first diode D1 is connected to the connection between the key switch SW1 and the first resistor group R11;

[0056] The connection point between the first diode D1 and the first resistor group R11 is connected to the anode of the second diode D2 , and the cathode of the second diode D2 is connected to the output end of the detection control module 2 and the on / off control end of the switch module 3 .

[0057] Specifically, the first resistor R1 is used for voltage division, the first diode D1 and the second diode D2 are used to ensure the current direction to avoid device damage and current backflow, and the first resistor group R11 is used to form a loop from the external power bank, the first resistor group R11 to the ground when the key switch is pressed, thereby generating an excitation current, and the excitation current is used to activate the power bank to turn on. Among them, the first resistor group R11 is formed by one or more resistors connected in series. In the embodiment of the present application, the first resistor group R11 includes multiple resistors, and any two of the multiple resistors are connected in parallel.

[0058] More specifically, the value of the excitation current is adjusted by connecting multiple resistors in parallel. In this embodiment, the power bank is triggered to pass a current of about 50 mA, and the current size is determined by the resistance value of the resistor group formed by connecting multiple resistors in parallel in the first resistor group R11.

[0059] The detection control module includes an MCU, and the MCU includes an input terminal and an output terminal;

[0060] The input end of the MCU is connected to the connection point between the first resistor R1 and the first diode D1 , and the input end of the MCU is connected to the connection point between the second diode D2 and the switch module 3 .

[0061] The detection control module 2 includes a third diode D3;

[0062] The cathode of the third diode D3 is connected to the connection point between the second diode D2 and the switch module 3 , and the anode of the third diode D3 is connected to the input end of the MCU.

[0063] Specifically, detection and corresponding output are performed through MCU. When the excitation current is generated, the MCU detects that the input terminal MCU_INT is a low-level signal, and a high-level signal is sent through the output terminal MCU_OUT, thereby controlling the conduction of the switch module 3; conversely, the MCU input terminal MCU_INT detects a high-level signal, and it is converted to a low level through the output terminal MCU_OUT, thereby turning off the switch module 3.

[0064] More specifically, the resistance of the first resistor R1 is much larger than that of the first resistor group R11. In the present embodiment, the resistance of the first resistor is 10K, and the first resistor group is composed of three 50R resistors in parallel. When the key switch SW1 is pressed, the power is started from the off state. In this case, the external power bank is connected from the power supply end to the ground through the three 50R resistors, thereby generating an excitation current of about 50mA. At this time, the power bank is activated and turned on, and the MCU on the control board will send an MCU_OUT signal, which is a high-level signal in the present embodiment, so that the path of the switch module 3 is opened; if the key control is to shut down, the key switch SW1 is disconnected, and the external power bank supplies energy to the ground through the first resistor. In this case, MCU_INT is a high-level signal, corresponding to the control MCU_OUT output of a low level, thereby turning off the switch module 3 and cutting off the power supply to the load device.

[0065] The switch module includes a first transistor Q1, a second resistor R2, a third resistor R3 and a first MOS tube M1;

[0066] One end of the second resistor R2 is connected to the connection point between the second diode D2 and the third diode D3, and the other end is connected to the base of the first transistor Q1. The emitter of the first transistor Q1 is grounded, and the collector of the first transistor Q1 is connected to one end of the third resistor R3 and the gate of the first MOS transistor M1.

[0067] The power supply end of the external power bank is connected to the other end of the third resistor R3 and the source of the first MOS tube M1 , and the drain of the first MOS tube M1 is connected to the load.

[0068] One end of the fourth resistor R4 is connected to the connection point between the second resistor R2 and the first transistor D1 , and the other end is grounded.

[0069] Specifically, when MCU_OUT outputs a high level, the base of the first transistor Q1 is pulled up to be turned on, and the base of the first MOS tube M1 is grounded and pulled down because of the conduction of the first transistor Q1. Due to the voltage division of the third resistor R3, M1 is turned on. After M1 is turned on, the power supply line of the external power bank to the load device is turned on, thereby achieving conduction. A fourth resistor R4 is also provided as a discharge circuit to prevent the electrical signal from having nowhere to be discharged and damaging the first transistor Q1 when the first transistor Q1 is not turned on, thereby protecting the device and increasing its service life, and ensuring the reliability of the circuit.

[0070] A second aspect of the present application provides a switch device adapted for a power bank, which is equipped with the above-mentioned switch circuit adapted for a power bank.

[0071] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A switch circuit adapted for a power bank, characterized in that: It includes a trigger module, a detection control module, and a switch module. The trigger module includes an input terminal and an output terminal. The detection control module includes an input terminal and an output terminal. The switch module includes an on-off control terminal, an input terminal, and an output terminal. The input end of the trigger module is connected to the power supply end of the external power bank, the output end of the trigger module is connected to the input end of the detection control module, the output end of the detection control module is connected to the on-off control end, the input end of the switch module is connected to the connection between the trigger module and the external power bank, and the output end of the switch module is connected to the load; The trigger module includes a trigger switch, which is used to adjust the control level signal output to the input end of the detection control module according to the on-off of the trigger switch; The detection control module is used to send a switch control signal to the switch module through the output end of the detection control module according to the control level signal; The switch module is used to control the on and off of the switch module according to the switch control signal, so as to control the power supply of the external power bank to the load.

2. The switch circuit adapted for power bank according to claim 1, characterized in that: The trigger module includes a key switch, a first resistor, a first diode, a second diode and a first resistor group, wherein the first resistor group includes one or more resistors; One end of the key switch is connected to the power supply end of the external power bank, and the other end is connected to one end of the first resistor group, and the other end of the first resistor group is grounded; One end of the first resistor is connected to the connection between the external power bank and the key switch, and the other end is connected to the input end of the detection control module and the positive electrode of the first diode, and the negative electrode of the first diode is connected to the connection between the key switch and the first resistor group; The connection point between the first diode and the first resistor group is connected to the anode of the second diode, and the cathode of the second diode is connected to the output end of the detection control module and the on-off control end of the switch module.

3. The switch circuit adapted for power bank according to claim 2, characterized in that: The detection control module includes an MCU, and the MCU includes an input terminal and an output terminal; The input end of the MCU is connected to the connection point between the first resistor and the first diode, and the input end of the MCU is connected to the connection point between the second diode and the switch module.

4. The switch circuit adapted for power bank according to claim 3, characterized in that: The detection control module includes a third diode; The cathode of the third diode is connected to the connection point between the second diode and the switch module, and the anode of the third diode is connected to the input end of the MCU.

5. The switch circuit adapted for power bank according to claim 4, characterized in that: The switch module includes a first triode, a second resistor, a third resistor and a first MOS tube; One end of the second resistor is connected to the connection point between the second diode and the third diode, and the other end is connected to the base of the first transistor, the emitter of the first transistor is grounded, and the collector of the first transistor is connected to one end of the third resistor and the gate of the first MOS transistor; The power supply end of the external power bank is connected to the other end of the third resistor and the source of the first MOS tube, and the drain of the first MOS tube is connected to the load.

6. The switch circuit adapted for power bank according to claim 5, characterized in that: The switch module further includes a fourth resistor; One end of the fourth resistor is connected to the connection point between the second resistor and the first transistor, and the other end is grounded.

7. The switch circuit adapted for power bank according to claim 2, characterized in that: The first resistor group includes a plurality of resistors, and any two resistors among the plurality of resistors are connected in parallel.

8. A switch device adapted for a power bank, characterized in that: A switch circuit adapted for a power bank as described in any one of claims 1 to 7 is provided.

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