Activation circuit and electronic device

Abstract

The application discloses an activation circuit and an electronic device. The activation circuit comprises a first switch branch, a second switch branch, an energy storage branch and a self-locking branch. The first switch branch is configured to be turned on or turned off. The energy storage branch is charged by a power supply when the first switch branch is turned on. The second switch branch is turned on when the energy storage branch is charged to output an activation signal to a controller based on a voltage output of the power supply. The self-locking branch outputs a first feedback signal when the first switch branch is turned on to make the controller output a first control signal. The self-locking branch outputs a self-locking signal to the second switch branch when the first control signal is received, and stops outputting the self-locking signal when the first control signal is not received. The second switch branch remains turned on in response to the self-locking signal, and is turned off when the energy storage branch is charged and the self-locking signal is not received. In this way, the connection between the power supply and the controller can be automatically disconnected when the electronic device is abnormal or powered off, so as to reduce power consumption.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to an activation circuit and electronic device. Background Technology

[0002] With the increasingly widespread application of lithium-ion batteries, more and more electronic devices are powered by them. The Battery Management System (BMS) acts as the link between the battery and the user, primarily aiming to improve battery utilization, prevent overcharging and over-discharging, extend battery life, and monitor battery status. In lithium-ion battery management systems, a sleep state exists to reduce power consumption. This sleep state requires an activation circuit to unlock it, specifically by activating the MCU (Microcontroller Unit).

[0003] Currently, the activation method typically involves closing a toggle switch to trigger the switching circuit connected between the power supply and the MCU, thereby activating the MCU. However, with this method, when the electronic device malfunctions or shuts down, the toggle switch needs to be manually disconnected; otherwise, the power supply will remain connected to the MCU, resulting in additional power loss. Utility Model Content

[0004] This application provides an activation circuit and an electronic device that can automatically disconnect the power supply and controller when the electronic device malfunctions or is shut down, thereby reducing power consumption.

[0005] In a first aspect, embodiments of this application provide an activation circuit, including: a first switching branch, a second switching branch, an energy storage branch, and a self-locking branch; the second switching branch is connected between a power supply and a controller; the energy storage branch is connected to both the first switching branch and the second switching branch; the self-locking branch is connected to the first switching branch, the second switching branch, and the controller; the first switching branch is configured to be turned on or off; the energy storage branch is configured to be charged by the power supply when the first switching branch is turned on; the second switching branch is configured to be turned on when the energy storage branch is charged, so as to output an activation signal to the controller based on the voltage of the power supply. The controller is activated; the self-locking branch is configured to output a first feedback signal to the controller when the first switch branch is turned on, so that the controller outputs a first control signal to the self-locking branch based on the first feedback signal; the self-locking branch is further configured to output a self-locking signal to the second switch branch when the first control signal is received, and is configured to stop outputting the self-locking signal when the first control signal is not received; the second switch branch is further configured to remain on in response to the self-locking signal, and is configured to turn off when the energy storage branch finishes charging and the self-locking signal is not received, so as to disconnect the connection between the power supply and the controller.

[0006] In one or more embodiments, the self-locking branch includes: a filtering unit connected between the first switching branch and the controller, configured to filter the signal generated when the first switching branch is turned on, so as to output the first feedback signal to the controller; and a switching unit connected between the controller and the second switching branch, configured to turn on when the first control signal is received, so as to output the self-locking signal, and configured to turn off when the first control signal is not received, so as to stop outputting the self-locking signal.

[0007] In one or more embodiments, the first switch branch includes a toggle switch; the first end of the toggle switch is connected to the energy storage branch and the self-locking branch respectively, and the second end of the toggle switch is grounded.

[0008] In one or more embodiments, the second switching branch includes a first switching transistor, a first resistor, and a second resistor; the first end of the first switching transistor is connected to the second end of the first resistor, the first end of the second resistor, and the energy storage branch, respectively; the second end of the first switching transistor is connected to the first end of the first resistor and the positive terminal of the power supply, respectively; the third end of the first switching transistor is connected to the controller; and the second end of the second resistor is connected to the self-locking branch.

[0009] In one or more embodiments, the energy storage branch includes a first capacitor; a first terminal of the first capacitor is connected to the second switching branch, and a second terminal of the first capacitor is connected to both the first switching branch and the self-locking branch.

[0010] In one or more embodiments, the filtering unit includes a third resistor and a second capacitor; the first end of the third resistor is connected to the first switching branch and the energy storage branch respectively, the second end of the third resistor is connected to the first end of the second capacitor and the controller respectively, and the second end of the second capacitor is grounded.

[0011] In one or more embodiments, the switching unit includes a second switching transistor, a fourth resistor, and a fifth resistor; the first terminal of the second switching transistor is connected to the first terminal of the fourth resistor and the first terminal of the fifth resistor, respectively; the second terminal of the second switching transistor is grounded; the third terminal of the second switching transistor is connected to the second switching branch; the second terminal of the fourth resistor is connected to the controller; and the second terminal of the fifth resistor is grounded.

[0012] In one or more embodiments, the activation circuit further includes a first diode and a second diode; the anode of the first diode is connected to the second switching branch, the cathode of the first diode is connected to the energy storage branch, the anode of the second diode is connected to the self-locking branch, and the cathode of the second diode is connected to both the first switching branch and the energy storage branch.

[0013] In one or more embodiments, the first switching transistor in the second switching branch is a PNP transistor, with its first terminal being the base of the PNP transistor, its second terminal being the emitter of the PNP transistor, and its third terminal being the collector of the PNP transistor; the second switching transistor in the switching unit is an NPN transistor, with its first terminal being the base of the NPN transistor, its second terminal being the emitter of the NPN transistor, and its third terminal being the collector of the NPN transistor.

[0014] Secondly, embodiments of this application provide an electronic device, including a power supply, a controller, and an activation circuit as described above; the activation circuit is connected between the power supply and the controller.

[0015] The beneficial effects of this application are as follows: The activation circuit of this application embodiment includes a first switching branch, a second switching branch, an energy storage branch, and a self-locking branch. When the first switching branch is turned on, the energy storage branch is charged by the power supply. At this time, the second switching branch is turned on and outputs an activation signal to the controller based on the voltage of the power supply, thus activating the controller. Simultaneously, the self-locking branch outputs a first feedback signal to the controller. The controller outputs a first control signal to the self-locking branch based on the first feedback signal. The self-locking branch outputs a self-locking signal to the second switching branch, so that the second switching branch remains on. When the electronic device including this activation circuit malfunctions or shuts down, the controller stops outputting the first control signal, so that the self-locking branch stops outputting the self-locking signal. At the same time, since the energy storage branch has finished charging, the second switching branch is turned off, and the connection between the power supply and the controller is disconnected. The power supply will not have additional power loss, thereby achieving the purpose of reducing power consumption. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are not intended to limit the embodiments, and elements having the same reference numerals in the drawings are designated as similar elements.

[0017] Figure 1 This is a schematic diagram of the activation circuit provided in the embodiments of this application. Figure 1 ; Figure 2 This is a schematic diagram of the activation circuit provided in the embodiments of this application. Figure 2 ; Figure 3 This is a schematic diagram of the activation circuit provided in the embodiments of this application. Figure 3 ; Figure 4 This is a schematic diagram of the activation circuit provided in the embodiments of this application. Figure 4 . Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0019] It should be noted that when an element is described as "connected" to another element, it can be directly connected to the other element, or there can be one or more intermediate elements between them.

[0020] Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0021] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the block diagram of the activation circuit provided in an embodiment of this application. Figure 1 As shown, the activation circuit 100 includes a first switch branch 10, a second switch branch 20, an energy storage branch 30, and a self-locking branch 40.

[0022] The second switch branch 20 is connected between the power supply 200 and the controller 30. The energy storage branch 30 is connected to both the first switch branch 10 and the second switch branch 20. The self-locking branch 40 is connected to the first switch branch 10, the second switch branch 20, and the controller 300. Specifically, the first end of the second switch branch 20 is connected to the power supply 200, the second end of the second switch branch 20 is connected to the first end of the energy storage branch 30, the second end of the energy storage branch 30 is connected to both the first switch branch 10 and the first end of the self-locking branch 40, the second end of the self-locking branch 40 is connected to the first end of the controller 300, the third end of the self-locking branch 40 is connected to the second end of the controller 300, the fourth end of the self-locking branch 40 is connected to the third end of the second switch branch 20, and the fourth end of the second switch branch 20 is connected to the third end of the controller 300.

[0023] Specifically, the first switching branch 10 is configured to be on or off. The energy storage branch 30 is configured to be charged by the power supply 200 when the first switching branch 10 is on. The second switching branch 20 is configured to be on when the energy storage branch 30 is being charged, to output an activation signal to the controller 300 based on the voltage of the power supply 200, and to activate the controller 300. The self-locking branch 40 is configured to output a first feedback signal to the controller 300 when the first switching branch 10 is on, so that the controller 300 outputs a first control signal to the self-locking branch 40 based on the first feedback signal. The self-locking branch 40 is also configured to output a self-locking signal to the second switching branch 20 when the first control signal is received, and is configured to stop outputting the self-locking signal when the first control signal is not received. The second switching branch 20 is also configured to remain on in response to the self-locking signal, and is configured to be off when the energy storage branch 30 finishes charging and no self-locking signal is received, to disconnect the connection between the power supply 200 and the controller 300.

[0024] In practical applications, when the first switch branch 10 is turned on, the energy storage branch 30 is charged by the power supply 200. At this time, the second switch branch 20 is turned on and outputs an activation signal to the controller 300 based on the voltage of the power supply 200, thus activating the controller 300. Simultaneously, the self-locking branch 40 outputs a first feedback signal to the controller 300. The controller 300 outputs a first control signal to the self-locking branch 40 based on the first feedback signal. The self-locking branch 40 outputs a self-locking signal to the second switch branch 20 to keep the second switch branch 20 on. When the electronic device including the activation circuit 100 malfunctions and needs to stop operating, or when the electronic device is powered off, the controller 300 stops outputting the first control signal, causing the self-locking branch 40 to stop outputting the self-locking signal. At the same time, since the energy storage branch 30 has finished charging, the second switch branch 20 automatically turns off, and the connection between the power supply 200 and the controller 300 is disconnected. The power supply 200 does not experience additional power loss, thereby reducing power consumption.

[0025] In some embodiments, such as Figure 2 As shown, the self-locking branch 40 includes a filter unit 41 and a switching unit 42.

[0026] The filter unit 41 is connected between the first switch branch 10 and the controller 300, and the switch unit 42 is connected between the controller 300 and the second switch branch 20. Specifically, the first end of the filter unit 41 is connected to the second end of the energy storage branch 30 and the first switch branch 10, the second end of the filter unit 41 is connected to the first end of the controller 300, the first end of the switch unit 42 is connected to the second end of the controller 300, and the second end of the switch unit 42 is connected to the third end of the second switch branch 20. The first end of the filter unit 41 is also the first end of the self-locking branch 40, the second end of the filter unit 41 is also the second end of the self-locking branch 40, the first end of the switch unit 42 is also the third end of the self-locking branch 42, and the second end of the switch unit 42 is also the fourth end of the self-locking branch 42.

[0027] Specifically, the filtering unit 41 is configured to filter the signal generated when the first switch branch 10 is turned on, so as to output a first feedback signal to the controller 300. The switching unit 42 is configured to turn on when a first control signal is received to output a self-locking signal, and is configured to turn off when no first control signal is received to stop outputting the self-locking signal.

[0028] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the circuit structure of the activation circuit provided in an embodiment of this application. Figure 3 As shown, the first switch branch 10 includes a toggle switch S1.

[0029] The first terminal of the toggle switch S1 is connected to the energy storage branch 30 and the self-locking branch 40, respectively, and the second terminal of the toggle switch S1 is grounded to GND. When the toggle switch S1 is closed, the corresponding first switch branch 10 is turned on; when the toggle switch S1 is open, the corresponding first switch branch 10 is turned off.

[0030] A toggle switch S1 is an electronic component that connects or disconnects a circuit by manually moving a switch handle. It typically has two or more positions, and changing the switch position controls the on / off state of the circuit or switches different circuit paths. In some embodiments, the toggle switch S1 includes at least one of a single-pole single-throw switch, a single-pole double-throw switch, and a double-pole double-throw switch.

[0031] In some embodiments, the second switching branch 20 includes a first switching transistor Q1, a first resistor R1, and a second resistor R2.

[0032] The first terminal of the first switch Q1 is connected to the second terminal of the first resistor R1, the first terminal of the second resistor R2, and the energy storage branch 30, respectively. The second terminal of the first switch Q1 is connected to the first terminal of the first resistor R1 and the positive terminal of the power supply 200, respectively. The third terminal of the first switch Q1 is connected to the controller 300, and the second terminal of the second resistor R2 is connected to the self-locking branch 40.

[0033] The second terminal of the first switch transistor Q1 is the first terminal of the second switch branch 20, the second terminal of the first switch transistor Q1 is the second terminal of the second switch branch 20, the second terminal of the second resistor R2 is the third terminal of the second switch branch 20, and the third terminal of the first switch transistor Q1 is the fourth terminal of the second switch branch 20.

[0034] The first resistor R1 is used to generate a voltage to drive the first switch Q1 to turn on. The first resistor R1 also serves to discharge current when the first switch Q1 is turned off, ensuring that the first switch Q1 is reliably turned off. The second resistor R2 is used for current limiting.

[0035] In this embodiment, the first switching transistor Q1 is a PNP transistor. The first terminal of the first switching transistor Q1 is the base of the PNP transistor, the second terminal of the first switching transistor Q1 is the emitter of the PNP transistor, and the third terminal of the first switching transistor Q1 is the collector of the PNP transistor.

[0036] In addition, the first switch Q1 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field-effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0037] In some embodiments, the energy storage branch 30 includes a first capacitor C1.

[0038] The first terminal of the first capacitor C1 is connected to the second switch branch 20, and the second terminal of the first capacitor C1 is connected to both the first switch branch 10 and the self-locking branch 40. The first terminal of the first capacitor C1 is the first terminal of the energy storage branch 30, and the second terminal of the first capacitor C1 is the second terminal of the energy storage branch 30.

[0039] When the toggle switch S1 is closed, the power supply 200, the first resistor R1, the first diode D1, the first capacitor C1, and the toggle switch S1 form a circuit, and the power supply 200 charges the first capacitor C1. When the voltage across the first capacitor C1 is equal to the voltage of the power supply 200, the charging of the first capacitor C1 ends. At this time, the charging current drops to zero, which is equivalent to the circuit no longer existing.

[0040] In some embodiments, the filter unit 41 includes a third resistor R3 and a second capacitor C2.

[0041] The first terminal of the third resistor R3 is connected to the first switch branch 10 and the energy storage branch 30, respectively. The second terminal of the third resistor R3 is connected to the first terminal of the second capacitor C2 and the controller 300, respectively. The second terminal of the second capacitor C2 is grounded to GND. The third resistor R3 and the second capacitor C2 form an RC filter.

[0042] The first end of the third resistor R3 is the first end of the filter unit 41, and the second end of the third resistor R3 is the second end of the filter unit 41.

[0043] In some embodiments, the switching unit 42 includes a second switching transistor Q2, a fourth resistor R4, and a fifth resistor R5.

[0044] The first terminal of the second switch Q2 is connected to the first terminal of the fourth resistor R4 and the first terminal of the fifth resistor R5 respectively. The second terminal of the second switch Q2 is grounded to GND. The third terminal of the second switch Q2 is connected to the second switch branch 20. The second terminal of the fourth resistor R4 is connected to the controller 300. The second terminal of the fifth resistor R5 is grounded to GND.

[0045] The second end of the fourth resistor R4 is the first end of the switching unit 42, and the third end of the second switching transistor Q2 is the second end of the switching unit 42.

[0046] The fourth resistor R4 and the fifth resistor R5 are used to divide the voltage of the first control signal output by the controller 300, and the voltage division across the fifth resistor R5 based on the voltage of the first control signal drives the second switch Q2 to turn on. The fifth resistor R5 also serves to discharge current when the second switch Q2 is turned off, ensuring reliable turn-off of the second switch Q2. The fourth resistor R4 is also used for current limiting.

[0047] In this embodiment, the second switch Q2 is an NPN transistor. The first terminal of the second switch Q2 is the base of the NPN transistor, the second terminal of the second switch Q2 is the emitter of the NPN transistor, and the third terminal of the second switch Q2 is the collector of the NPN transistor.

[0048] In addition, the second switch Q2 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field-effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0049] In some embodiments, the activation circuit 100 further includes a first diode D1 and a second diode D2.

[0050] The anode of the first diode D1 is connected to the second switch branch 20, the cathode of the first diode D1 is connected to the energy storage branch 30, the anode of the second diode D2 is connected to the self-locking branch 40, and the cathode of the second diode D2 is connected to the first switch branch 10 and the energy storage branch 30 respectively.

[0051] The first diode D1 is used to prevent current from flowing back into the power supply 200, thus protecting the power supply 200. The second diode D2 is used to prevent current from flowing back into the controller 300, thus protecting the controller 300.

[0052] The following are Figure 3 The working principle shown will be explained.

[0053] When the toggle switch S1 is closed, the power supply 200, the first resistor R1, the first diode D1, the first capacitor C1, and the toggle switch S1 form a circuit, and the power supply 200 charges the first capacitor C1. At this time, the first resistor R1 generates a voltage based on the charging current to drive the first switch Q1 to conduct. The voltage of the power supply 200 serves as an activation signal, which is input to the controller 300 through the first switch Q1 to activate the controller 300. Simultaneously, since the toggle switch S1 is closed, the third resistor R3 is grounded to GND through the second diode D2 and the toggle switch S1, corresponding to the first switch branch 10 being turned on, and outputs a low-level signal. This low-level signal is filtered by the RC filter of the third resistor R3 and the second capacitor C2 and then input to the controller 300. Based on the received low-level signal, the controller 300 determines that the toggle switch S1 is closed and outputs a first control signal. The first control signal is input to the first terminal of the second switch Q2 through the fourth resistor R4 to drive the second switch Q2 to conduct. The first terminal of the first switch Q1 is grounded to GND via the second resistor R2 and the second switch Q2. Correspondingly, the switching unit 42 outputs a latching signal (a low-level signal in this embodiment) to the first switch Q1 to keep it conducting. In this case, even if the first capacitor C1 is fully charged and there is no voltage difference across the first resistor R1, the first switch Q1 can still remain conducting due to the conduction of the second switch Q2, thus ensuring that the power supply 200 continues to supply power to the controller 300.

[0054] When the electronic device including the activation circuit 100 malfunctions and needs to stop operating, or when the electronic device is powered off, the controller 300 stops outputting the first control signal, causing the second switch Q2 to turn off. The connection between the first terminal of the first switch Q1 and ground GND is disconnected, corresponding to the self-locking branch 40 stopping the output of the self-locking signal. Simultaneously, since the first capacitor C1 has finished charging, the first switch Q1 automatically turns off, and the connection between the power supply 200 and the controller 300 is disconnected. The power supply 200 experiences no additional power loss, thereby reducing power consumption.

[0055] It should be noted that, as Figure 3 The hardware structure of the activation circuit 100 shown is only an example, and the activation circuit 100 may have more or fewer components than those shown in the figure, may combine two or more components, or may have different component configurations. The various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application-specific integrated circuits.

[0056] For example, in some embodiments, such as Figure 4As shown, the activation circuit 100 also includes a voltage conversion circuit 50. The voltage conversion circuit 50 is connected between the second switching branch 20 and the controller 300, and is used to convert the power supply voltage into the supply voltage required by the controller 300 when the second switching branch 20 is turned on. In some embodiments, the voltage conversion circuit 50 includes a low dropout regulator (LDO).

[0057] This application also provides an electronic device, which includes a power supply, a controller, and an activation circuit 100 as described in any embodiment of this application. The activation circuit 100 is connected between the power supply and the controller.

[0058] In some embodiments, the power source includes a battery, which includes a plurality of cells connected in parallel, series, or mixed connections for storing and providing electrical energy. The mixed connection includes both series and parallel connections.

[0059] In some embodiments, the controller may be a microcontroller unit (MCU) or a digital signal processing (DSP) controller, etc.

[0060] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

[0061] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An activation circuit, characterized in that, include: The circuit consists of a first switch branch, a second switch branch, an energy storage branch, and a self-locking branch; The second switch branch is connected between the power supply and the controller. The energy storage branch is connected to the first switch branch and the second switch branch respectively. The self-locking branch is connected to the first switch branch, the second switch branch and the controller respectively. The first switch branch is configured to be on or off; The energy storage branch is configured to be charged by the power source when the first switch branch is turned on; The second switching branch is configured to turn on when the energy storage branch is charged, so as to output an activation signal to the controller based on the voltage of the power supply and activate the controller; The self-locking branch is configured to output a first feedback signal to the controller when the first switch branch is turned on, so that the controller outputs a first control signal to the self-locking branch based on the first feedback signal. The self-locking branch is further configured to output a self-locking signal to the second switch branch when the first control signal is received, and to stop outputting the self-locking signal when the first control signal is not received; The second switch branch is also configured to remain on in response to the latching signal and to turn off when the energy storage branch finishes charging and no latching signal is received, thereby disconnecting the power supply from the controller.

2. The activation circuit according to claim 1, characterized in that, The self-locking branch includes: A filtering unit, connected between the first switch branch and the controller, is configured to filter the signal generated when the first switch branch is turned on, so as to output the first feedback signal to the controller. A switching unit, connected between the controller and the second switching branch, is configured to turn on when the first control signal is received to output the self-locking signal, and is configured to turn off when the first control signal is not received to stop outputting the self-locking signal.

3. The activation circuit according to claim 1 or 2, characterized in that, The first switch branch includes a toggle switch; The first terminal of the toggle switch is connected to the energy storage branch and the self-locking branch, respectively, and the second terminal of the toggle switch is grounded.

4. The activation circuit according to claim 1 or 2, characterized in that, The second switching branch includes a first switching transistor, a first resistor, and a second resistor; The first terminal of the first switch is connected to the second terminal of the first resistor, the first terminal of the second resistor, and the energy storage branch, respectively. The second terminal of the first switch is connected to the first terminal of the first resistor and the positive terminal of the power supply, respectively. The third terminal of the first switch is connected to the controller, and the second terminal of the second resistor is connected to the self-locking branch.

5. The activation circuit according to claim 1 or 2, characterized in that, The energy storage branch includes a first capacitor; The first terminal of the first capacitor is connected to the second switch branch, and the second terminal of the first capacitor is connected to both the first switch branch and the self-locking branch.

6. The activation circuit according to claim 2, characterized in that, The filtering unit includes a third resistor and a second capacitor; The first end of the third resistor is connected to the first switch branch and the energy storage branch respectively, the second end of the third resistor is connected to the first end of the second capacitor and the controller respectively, and the second end of the second capacitor is grounded.

7. The activation circuit according to claim 2, characterized in that, The switching unit includes a second switching transistor, a fourth resistor, and a fifth resistor; The first terminal of the second switch is connected to the first terminal of the fourth resistor and the first terminal of the fifth resistor, respectively. The second terminal of the second switch is grounded. The third terminal of the second switch is connected to the second switch branch. The second terminal of the fourth resistor is connected to the controller. The second terminal of the fifth resistor is grounded.

8. The activation circuit according to claim 2, characterized in that, The activation circuit also includes a first diode and a second diode; The anode of the first diode is connected to the second switch branch, the cathode of the first diode is connected to the energy storage branch, the anode of the second diode is connected to the self-locking branch, and the cathode of the second diode is connected to both the first switch branch and the energy storage branch.

9. The activation circuit according to claim 2, characterized in that, The first switching transistor in the second switching branch is a PNP transistor. The first terminal of the first switching transistor is the base of the PNP transistor, the second terminal of the first switching transistor is the emitter of the PNP transistor, and the third terminal of the first switching transistor is the collector of the PNP transistor. The second switching transistor in the switching unit is an NPN transistor. The first terminal of the second switching transistor is the base of the NPN transistor, the second terminal of the second switching transistor is the emitter of the NPN transistor, and the third terminal of the second switching transistor is the collector of the NPN transistor.

10. An electronic device, characterized in that, Includes a power supply, a controller, and an activation circuit as described in any one of claims 1-9; The activation circuit is connected between the power supply and the controller.

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