Electronic device

Abstract

The embodiment of the invention discloses electronic equipment, the electronic equipment comprises a battery pack, a startup control circuit and a power management chip, and the startup control circuit comprises a key circuit, a first switching circuit and a second switching circuit. The key circuit is connected with the battery pack, and the key circuit responds to key operation of a user and outputs a first signal. The first switch circuit can conduct connection between the key circuit and the power management chip when receiving a voltage signal of a system power supply. The second switching circuit can output a second signal to the battery pack when receiving the voltage signal of the system power supply. According to the electronic equipment, in a low-power-consumption mode, synchronous awakening of the battery and triggering of startup can be achieved by pressing the power button or connecting the power supply through the USB, and the applicability of the product is improved.

Description

electronic devices Technical Field

[0001] The present application belongs to the technical field of electronic products, and in particular relates to an electronic device. Background Art

[0002] To comply with battery safety requirements for air transport, electronic products shipped overseas must be transported with a low battery charge. However, when selling electronic products to users, they must be able to power on the device by pressing the power button. This means that the low-battery charge must still have sufficient power to power on the device after transportation. Therefore, electronic products must be shipped, transported, and stored in a preset low-power mode.

[0003] Taking a mobile phone as an example, when an electronic product enters low-power mode, the phone's battery management system (BMS) controls the switch circuit to disconnect the battery from the phone. It also shuts down most modules, putting the battery into a dormant state. However, in this scenario, when a user wants to turn on the phone for the first time, there are two ways to do so: by pressing the power button or by connecting it to a power source via a universal serial bus (USB). Both of these methods require battery power to power on. Current mobile phones cannot achieve this. Therefore, how to ensure that when a mobile phone is in low-power mode, the user can wake up the battery and trigger the phone to turn on by pressing the power button or connecting it to a power source via USB is a pressing issue.

[0004] Summary of the Invention

[0005] An embodiment of the present application discloses an electronic device. In low power consumption mode, the electronic device of the present application can realize synchronously waking up the battery and triggering the startup by pressing the power button or connecting the power supply via USB.

[0006] The present application provides an electronic device, including a battery pack, a power-on control circuit and a power management chip. The power-on control circuit can be electrically connected between the battery pack and the power management chip, and the power-on control circuit can include a key circuit, a first switch circuit and a second switch circuit. The key circuit is electrically connected to the battery pack, and the key circuit can output a first signal in response to a user's key operation. The first switch circuit is electrically connected between the key circuit and the power management chip, and the first switch circuit is used to conduct the connection between the key circuit and the power management chip when receiving a voltage signal from a system power supply. The second switch circuit is electrically connected to the battery pack, and the second switch circuit outputs a second signal to the battery pack when receiving a voltage signal from a system power supply. Based on such a design, the electronic device of the present application can meet the battery safety requirements for air transportation when shipped overseas, and can also be sold to users so that the user can wake up the battery and trigger the power on by pressing the power button or connecting the power supply via USB, thereby improving the applicability of the product.

[0007] In one optional implementation, when the key circuit outputs a first signal to wake up the battery pack, the system power supply outputs a voltage signal based on the power supply of the battery pack to control the first switch circuit to connect the key circuit to the power management chip, thereby transmitting the first signal to the power management chip. When a user presses the power button of the electronic device, the battery can be woken up and the device can be turned on simultaneously.

[0008] In one alternative implementation, when the electronic device is plugged into a universal serial bus (USB) device, the power management chip triggers the electronic device to power on via the system power management interface bus, causing the system power supply to output a voltage signal to the second switching circuit. Upon receiving the voltage signal, the second switching circuit outputs a second signal to the battery pack to wake the battery pack. When the user connects the electronic device to a power source via USB, the battery can be woken up and the device can be powered on simultaneously.

[0009] In one optional implementation, the button circuit includes a power button and a first resistor. The power button includes a first end, a second end, and a pressing end. The first end of the power button is grounded, and the second end of the power button is electrically connected to the first switch circuit and the battery pack via the first resistor. Based on this design, when a user presses the power button, the button circuit can output a first signal to the battery pack and the power management chip, thereby simultaneously waking up the battery and triggering power on.

[0010] In one optional implementation, when the push-button is pressed, the first and second ends are connected, causing the key circuit to output a first signal to the battery pack and the power management chip. Therefore, when the user presses the push-button, the key circuit can output the first signal, thereby simultaneously waking up the battery and triggering power on.

[0011] In an optional implementation, when the pressing end is not pressed, the first end and the second end are disconnected.

[0012] In an optional implementation, the first switching circuit includes a first switching tube and a second resistor, the first end of the first switching tube is electrically connected to the system power supply, the second end of the first switching tube is electrically connected to the power management chip, the third end of the first switching tube is electrically connected to the second end of the power button through the first resistor, and the third end of the first switching tube is also electrically connected to the battery pack through the second resistor.

[0013] In one optional implementation, when the push-button is pressed, a first signal is transmitted to the battery pack to wake it up, and the system power supply outputs the voltage signal to control the conduction of the first switch tube, thereby transmitting the first signal to the power management chip. Based on this design, after the first signal wakes up the battery pack, by controlling the conduction of the first switch tube, the first signal output by the key circuit can be transmitted to the power management chip, thereby achieving the goal of simultaneously waking up the battery and triggering power on by pressing the power button.

[0014] In an optional implementation, the second switching circuit includes a second switching tube and a third resistor, the first end of the second switching tube is electrically connected to the system power supply, the second end of the second switching tube is grounded, and the third end of the second switching tube is electrically connected to the battery pack through the third resistor.

[0015] In an optional implementation, the battery pack may include a battery cell, a battery management chip and a fourth resistor, the enable pin of the battery management chip is electrically connected to the positive electrode of the battery cell through the fourth resistor, the enable pin is also electrically connected to the third end of the second switch tube through the third resistor, and the enable pin is also electrically connected to the third end of the first switch tube through the second resistor.

[0016] In an optional implementation, when the electronic device is plugged into a universal serial bus device, the power management chip triggers the electronic device to start up through the system power management interface bus, so that the system power outputs the voltage signal to the second switch tube to control the second switch tube to turn on, and the second signal is transmitted to the enable pin of the battery pack to wake up the battery pack.

[0017] In an optional implementation, when the electronic device is plugged into a universal serial bus device, the power management chip triggers the electronic device to start up through the system power management interface bus, and the system power outputs a voltage signal to control the first switch tube to turn on.

[0018] In an optional implementation, the first signal is used to wake up the battery pack and to enable the power management chip to trigger the electronic device to turn on, and the second signal is used to wake up the battery pack. Both the first signal and the second signal can be low-level signals.

[0019] The electronic device provided in this application can, in low-power mode, simultaneously wake up the battery and trigger power-on by pressing the power button or connecting to a power source via USB. This electronic device can meet battery safety requirements for air transportation when shipped overseas, and can also be guaranteed to power on by the user by pressing the power button or plugging in a USB, thus improving the product's applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a diagram showing an application scenario of an electronic device provided in an embodiment of the present application.

[0021] FIG2 is another application scenario diagram of the electronic device provided in an embodiment of the present application.

[0022] FIG3 is a schematic diagram of an electronic device according to an embodiment of the present application.

[0023] FIG4 is another schematic diagram of an electronic device according to an embodiment of the present application.

[0024] FIG5 is a circuit diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, words such as "exemplary" and "or" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of words such as "exemplary" and "or" or "for example" is intended to present the relevant concepts in a concrete way.

[0026] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0027] To comply with battery safety requirements for air transport, electronic products shipped overseas must be transported with a low battery charge. However, when selling electronic products to users, they must be able to power on the device by pressing the power button. This means that the low-battery charge must still have sufficient power to power on the device after transportation. Therefore, electronic products must be shipped, transported, and stored in a preset low-power mode.

[0028] Taking a mobile phone as an example, when an electronic product enters low-power mode, the battery management system controls the charge and discharge switching circuit to disconnect the battery from the phone. It also shuts down most modules, putting the battery into a dormant state. In this scenario, when a user wants to power on the phone for the first time, there are two options: pressing the power button or connecting to a power source via a universal serial bus (USB). Both of these methods require battery power to power on. Current mobile phones cannot achieve this. Therefore, how to ensure that when a phone is in low-power mode, pressing the power button or connecting to a power source via USB can simultaneously wake up the battery and trigger a power-on trigger is an urgent problem that needs to be solved.

[0029] To address the above issues, the present application provides an electronic device that, when in low-power mode, can simultaneously wake up the battery and trigger power-on by pressing the power button or connecting a USB power source. This electronic device can meet battery safety requirements for air transportation when shipped overseas, and when sold to users, users can be guaranteed to power on by pressing the power button or plugging in a USB power source, thereby improving the product's applicability.

[0030] Please refer to Figure 1, which is an application scenario diagram of an electronic device 100 provided in one embodiment of the present application. The electronic device 100 of the present application can be an electronic product such as a mobile phone, a tablet computer, a smart wearable device, etc. The present embodiment of the application uses the electronic device 100 as an example to illustrate.

[0031] As shown in Figure 1, this is an application scenario diagram of the present application for turning on the electronic device 100 by pressing a button. The electronic device 100 is in low power mode, and the user can control the electronic device 100 to exit the low power mode (that is, the battery is awakened) and trigger the electronic device 100 to start up by pressing the power button SW1 of the electronic device 100. It can be understood that the low power mode mentioned in this article refers to the electronic device 100, in which the battery management system controls the charge and discharge switch circuit to disconnect the battery from the electronic device 100, the battery no longer supplies power to the electronic device 100, and most of the modules of the battery management system are turned off to put the battery into a dormant state.

[0032] Please refer to FIG. 2 , which is another application scenario diagram of the electronic device 100 provided in one embodiment of the present application.

[0033] As shown in Figure 2, this is an application scenario diagram of the present application for powering on the electronic device 100 by connecting the power source to a USB. In this scenario, the electronic device 100 is in low-power mode, and the USB interface of the electronic device 100 can be plugged into the USB interface of the electronic device 200 via a USB cable. The electronic device 200 can power the electronic device 100, thereby triggering the electronic device 100 to power on. It is understood that in some optional implementations, the electronic device 200 can be, but is not limited to, a charger, a computer case, or a laptop computer. In the embodiment of the present application, the electronic device 200 is illustrated as a computer case.

[0034] As shown in the application scenarios of FIG. 1 and FIG. 2 , the electronic device 100 of the present application can realize the functions of button power-on and USB power-on in the low power consumption mode.

[0035] Please refer to FIG3 , which is a schematic diagram of an electronic device 100 provided in accordance with an embodiment of the present application.

[0036] The electronic device 100 includes a power-on control circuit 10 , a battery pack 20 , and a power management chip 30 . The power-on control circuit 10 is electrically connected between the battery pack 20 and the power management chip 30 .

[0037] The battery pack 20 is used to power the electronic devices in the electronic device 100. The electronic devices may include a motherboard, a display, a microphone, etc. The power-on control circuit 10 is used to control the battery pack 20 to exit the low-power mode and trigger the electronic device 100 to power on in response to user operations.

[0038] For example, when the user presses the power button, the power-on control circuit 10 can wake up the battery pack 20 and trigger the electronic device 100 to power on. When the user plugs the USB port of the electronic device 100 into the USB port of the electronic device 200 via a USB cable, the power-on control circuit 10 can wake up the battery pack 20 and trigger the electronic device 100 to power on.

[0039] Please refer to FIG4 , which is a schematic diagram of an electronic device 100 provided in accordance with an embodiment of the present application.

[0040] As shown in FIG. 4 , in this embodiment, the power-on control circuit 10 may include a key circuit 12 , a first switch circuit 14 , and a second switch circuit 16 .

[0041] The first switch circuit 14 is electrically connected between the battery pack 20 and the power management chip 30. The first switch circuit 14 is also electrically connected to the system power supply 18. The key circuit 12 is electrically connected to the battery pack 20 and the first switch circuit 14. The second switch circuit 16 is electrically connected to the battery pack 20 and the first switch circuit 14. The second switch circuit 16 is also electrically connected to the system power supply 18.

[0042] It can be understood that the system power supply 18 can be used to output a voltage signal to the first switch circuit 14 and the second switch circuit 16 when receiving power from the battery pack 20. The system power supply 18 can also be used to output a voltage signal to the first switch circuit 14 and the second switch circuit 16 when the electronic device 100 is connected to a power source via a USB. In an optional example, the system power supply 18 can be a power conversion circuit in the electronic device 100. For example, the system power supply 18 can be a power conversion circuit on the mainboard of the electronic device 100, and the power conversion circuit can be used to convert the power supply voltage of the battery pack 20 into a voltage signal having a voltage value. The power conversion circuit can also be used to convert the power supply voltage of the electronic device 200 into a voltage signal having a voltage value when the electronic device 100 is connected to the electronic device 200 via a USB cable. Optionally, the voltage value can be 1.8V.

[0043] It is understood that the key circuit 12 can output a first signal in response to a key operation by a user, wherein the first signal can be used to wake up the battery pack 20 and to enable the power management chip 30 to trigger the power on of the electronic device 100 .

[0044] The first switch circuit 14 may also be connected between the key circuit 12 and the power management chip 30 . The first switch circuit 14 may connect the key circuit 12 and the power management chip 30 upon receiving a voltage signal from the system power supply 18 .

[0045] The second switch circuit 16 may output a second signal upon receiving a voltage signal from the system power supply 18 , and the second signal may be used to wake up the battery pack 20 .

[0046] It can be understood that both the first signal and the second signal are low-level signals.

[0047] When the electronic device 100 is in low-power mode, the battery management chip (not shown in FIG. 4 ) in the battery pack 20 is inoperative, the discharge switch of the charge-discharge switch circuit in the battery pack 20 is turned off, the battery pack 20 does not power the electronic device 100, and the system power supply 18 does not output a voltage signal to the first switch circuit 14 and the second switch circuit 16. The first switch circuit 14 disconnects the key circuit 12 from the power management chip 30 and also disconnects the battery pack 20 from the power management chip 30. The second switch circuit 16 is in an off state, meaning that the second switch circuit 16 does not output a second signal to the battery pack 20.

[0048] In the first power-on scenario, the user presses the power button of the electronic device 100, and the key circuit 12 outputs a first signal to the battery management chip of the battery pack 20 to enable the battery management chip to start working. The battery management chip controls the discharge switch tube of the charge and discharge switch circuit to turn on, so that the battery pack 20 supplies power to the electronic device 100, thereby waking up the battery pack 20. The system power supply 18 is used to output a voltage signal to the first switch circuit 14 and the second switch circuit 16 when receiving power from the battery pack 20. The first switch circuit 14 is used to conduct the connection between the key circuit 12 and the power management chip 30 when receiving the voltage signal from the system power supply 18. In other words, the key circuit 12 is connected to the power management chip 30 through the first switch circuit 14 to output a first signal to the power management chip 30, thereby triggering the power-on of the electronic device 100.

[0049] In the second startup scenario, the user plugs the USB interface of the electronic device 100 into the USB interface of the electronic device 200 via a USB cable. The electronic device 200 will power the electronic device 100. The power management chip 30 can trigger the startup of the electronic device 100 through the system power management interface (SPMI) bus. The system power supply 18 outputs a voltage signal to the second switching circuit 16. The second switching circuit 16 is used to output a second signal to the battery management chip of the battery pack 20 after receiving the voltage signal, so as to enable the battery management chip to start working. The battery management chip controls the discharge switch tube of the charge and discharge switch circuit to turn on, so that the battery pack 20 powers the electronic device 100, thereby waking up the battery pack 20.

[0050] Please refer to FIG5 , which is a circuit diagram of an electronic device 100 provided in one embodiment of the present application.

[0051] The button circuit 12 includes a power button SW1 and a resistor R1. The power button SW1 includes a first terminal 1, a second terminal 2, and a pressing terminal 3. The first terminal 1 of the power button SW1 is grounded, and the second terminal 2 of the power button SW1 is connected to the first switch circuit 14 via the resistor R1. It is understood that, in an alternative example, the pressing terminal 3 can be a metal dome with a protrusion.

[0052] When the pressing end 3 of the power button SW1 is not pressed, the first end 1 of the power button SW1 is disconnected from the second end 2 of the power button SW1. When the pressing end 3 of the power button SW1 is pressed, the metal sheet deforms, allowing the metal sheet to establish an electrical connection between the first end 1 of the power button SW1 and the second end 2 of the power button SW1. When the user releases the power button SW1, the protrusion of the metal sheet rebounds, disconnecting the first end 1 of the power button SW1 from the second end 2 of the power button SW1.

[0053] In this embodiment, the first switch circuit 14 includes a switch tube Q1 and a resistor R2.

[0054] The first end of the switch Q1 is connected to the system power supply 18 via a resistor R2. The second end of the switch Q1 is connected to the power management chip 30. The third end of the switch Q1 is connected to the second end 2 of the power button SW1 via a resistor R1. The third end of the switch Q1 can also be connected to the battery pack 20 via a resistor R3. The first end of the switch Q1 can serve as a control end of the switch Q1. In other words, the first end of the switch Q1 can be used to receive a voltage signal output by the system power supply 18, and the voltage signal can control the conduction or shutdown of the switch Q1.

[0055] In this embodiment, when the switch Q1 is on, the power management chip 30 is connected to the battery pack 20, and the power management chip 30 is connected to the key circuit 12. When the switch Q1 is off, the power management chip 30 is disconnected from the battery pack 20, and the power management chip 30 is disconnected from the key circuit 12.

[0056] It can be understood that the switch tube Q1 in this embodiment can be any one of a metal oxide semiconductor field-effect transistor (MOSFET), an insulated gate bipolar transistor (IGBT), a bipolar power transistor (BPT), a junction gate field-effect transistor (JFET), a bipolar junction transistor (BJT) or a wide bandgap semiconductor field-effect transistor.

[0057] The power management chip 30 includes a trigger pin PHONE_ON, which is connected to the system power supply 18 via a resistor R4. The trigger pin PHONE_ON of the power management chip 30 is also electrically connected to the second end of the switch Q1.

[0058] The second switch circuit 16 includes a switch tube Q2 , a resistor R5 , and a resistor R6 .

[0059] The first terminal of the switch Q2 is connected to the system power supply 18 via a resistor R5. The second terminal of the switch Q2 is grounded. The third terminal of the switch Q2 is connected to the battery pack 20 via a resistor R6. The first terminal of the switch Q2 can serve as a control terminal of the switch Q2. In other words, the first terminal of the switch Q2 can be used to receive a voltage signal output by the system power supply 18, and the voltage signal can control the conduction or shutdown of the switch Q2.

[0060] It can be understood that the switch tube Q2 in this embodiment can be any one of a metal oxide semiconductor field-effect transistor (MOSFET), an insulated gate bipolar transistor (IGBT), a bipolar power transistor (BPT), a junction gate field-effect transistor (JFET), a bipolar junction transistor (BJT) or a wide bandgap semiconductor field-effect transistor.

[0061] The battery pack 20 may include a battery cell 21 , a battery management chip 22 and a resistor R7 .

[0062] The battery management chip 22 includes an enable pin CE, which is connected to the positive electrode B+ of the battery cell 21 through the resistor R7. The enable pin CE of the battery management chip 22 is also electrically connected to a node P1 between the resistor R6 and the resistor R3.

[0063] It is understood that in an optional embodiment, the battery pack 20 may further include a charge and discharge switch circuit (not shown in the figure), which is electrically connected between the battery cell 21 and the electrical device. The electrical device may be the motherboard or other electrical devices in the electronic device 100. The charge and discharge switch circuit may include a charge switch tube and a discharge switch tube. The battery management chip 22 may control the state of the discharge switch tube in the charge and discharge switch circuit, thereby powering the electrical device through the charge and discharge switch circuit. For example, when the signal pin of the battery management chip 22 outputs a signal to control the discharge switch tube to turn on, the battery cell 21 will be able to power the electrical device in the electronic device 100. When the battery management chip 22 is not working, that is, the signal pin of the battery management chip 22 does not output a signal, the discharge switch tube is turned off, and the battery cell 21 will not power the electrical device in the electronic device 100.

[0064] The following will take the circuit diagram shown in the embodiment of FIG. 5 as an example to describe in detail the power-on process of the electronic device 100 according to the embodiment of the present application.

[0065] When the electronic device 100 is in low power consumption mode, the battery management chip 22 of the battery pack 20 does not work, and the discharge switch tube of the charge and discharge switch circuit is in the off state. At this time, the battery cell 21 does not power the electronic device 100.

[0066] In the first power-on scenario, that is, the user powers on the electronic device 100 by pressing a button, the user presses the pressing end 3 of the power button SW1 of the electronic device 100, the first end 1 of the power button SW1 and the second end 2 of the power button SW1 are connected, and the enable pin CE of the battery management chip 22 is connected to the ground through the resistor R3 and the resistor R1 in sequence. The voltage V ce Satisfies the following formula (1). V ce =(r3+r1) / (r7+r3+r1)*V1 (1)

[0067] Among them, V ce is the voltage of the enable pin CE of the battery management chip 22 , r3 is the resistance value of the resistor R3 , r1 is the resistance value of the resistor R1 , r7 is the resistance value of the resistor R7 , and V1 is the voltage of the battery cell 21 .

[0068] It is understood that in one possible example, it is assumed that r3 is 200k ohms, r1 is 1.5k ohms, and r7 is 200M ohms. ce =(200k+1.5k) / (2M+200k+1.5k)*V1, and V ceLess than the first threshold. It is understood that, in an alternative implementation, the first threshold may be 0.55V. In other words, when the voltage on the enable pin CE is less than the first threshold, i.e., when the enable pin CE of the battery management chip 22 receives a low-level signal, the battery management chip 22 begins operation, waking up the battery pack 20 and exiting low-power mode. The battery pack 20 then controls the discharge switch in the charge-discharge switching circuit to conduct, thereby enabling the battery pack 20 to power the electronic devices 100. After receiving power from the battery pack 20, the system power supply 18 outputs a voltage signal to the switch Q2 and the switch Q1 to control the conduction of the switch Q2 and the switch Q1. The trigger pin PHONE_ON of the power management chip 30 is grounded through resistor R1, thereby pulling the voltage on the trigger pin PHONE_ON below the second threshold. This means that the trigger pin PHONE_ON of the power management chip 30 receives a low-level signal, thereby triggering the electronic device 100 to power on. It is understood that, in an alternative implementation, the second threshold may be 0.63V.

[0069] Since the switch Q2 is in the on state, even if the user has released the power button SW1, the enable pin CE of the battery management chip 22 is grounded through the resistor R6, even if the voltage V ce The voltage at the trigger pin PHONE_ON is still lower than the first threshold, meaning that the enable pin CE of the battery management chip 22 receives a low-level signal from the second switch circuit 16, allowing the battery pack 20 to remain in operation and thereby power the electronic device 100. Furthermore, when the switch Q1 is turned on, the trigger pin PHONE_ON of the power management chip 30 is grounded via resistors R3 and R6. The addition of resistor R3 to this loop means that the voltage at the trigger pin PHONE_ON will be higher than the third threshold. This prevents the voltage at the trigger pin PHONE_ON from interfering with the subsequent startup process of the electronic device 100, ensuring normal startup of the electronic device 100. It will be appreciated that, in an alternative implementation, the third threshold may be 1.17V.

[0070] In the second power-on scenario, when the user plugs the USB interface of the electronic device 100 into the USB interface of the electronic device 200 via a USB cable, the power management chip 30 can trigger the electronic device 100 to start up via the SPMI bus, and the system power supply 18 outputs a voltage signal to the switch tubes Q1 and Q2 to control the switch tubes Q1 and Q2 to turn on. At this time, the enable pin CE is grounded through the resistor R6, and the voltage V ce Satisfies the following formula (2). V ce =(r6 / (r6+r7))×V1 (2)

[0071] Wherein, r6 is the resistance value of the resistor R6 , r7 is the resistance value of the resistor R7 , and V1 is the voltage of the battery cell 21 .

[0072] In one example, r6 is 1.5k ohms and r7 is 200M ohms. ce =(1.5k / (1.5k+2M))×V1, and V ce When the voltage is lower than the first threshold, the enable pin CE of the battery management chip 22 receives a low-level signal, and the battery management chip 22 begins operation. This awakens the battery pack 20 and exits low-power mode. The battery pack 20 then controls the discharge switch in the charge-discharge switch circuit to conduct, thereby enabling the battery pack 20 to power the electronic device 100. Furthermore, when the switch Q1 is turned on, the trigger pin PHONE_ON of the power management chip 30 is grounded via resistors R3 and R6. The addition of resistor R3 to this circuit means that the voltage at the trigger pin PHONE_ON will be greater than the third threshold. This prevents the voltage at the trigger pin PHONE_ON from interfering with the subsequent startup process of the electronic device 100, ensuring normal startup of the electronic device 100. It will be appreciated that, in an alternative implementation, the third threshold may be 1.17V.

[0073] In the power-on control circuit 10 of the present application, the switch Q1 is electrically connected between the positive electrode B+ of the battery cell 21 and the trigger pin PHONE_ON of the power management chip 30. When the electronic device 100 is shut down and enters low-power mode, the system power supply 18 stops outputting voltage signals to the switch Q1, and the switch Q1 is turned off, thereby disconnecting the positive electrode B+ of the battery cell 21 from the power management chip 30. This cuts off the leakage path from the battery pack to the motherboard when the electronic device 100 is shut down, thereby reducing battery pack leakage.

[0074] Based on the above embodiments, the electronic device 100 of the present application can meet the battery safety requirements of air transportation when shipped overseas, and can also realize simultaneous triggering of battery activation and power-on by pressing the power button when sold to users, thereby improving the applicability of the product.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of some embodiments of the present application and are not limiting. Although some embodiments of the present application are described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solutions of some implementation examples of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of some embodiments of the present application.

Claims

1. An electronic device, characterized in that, It includes a battery pack, a power-on control circuit, and a power management chip. The power-on control circuit is electrically connected between the battery pack and the power management chip. The power-on control circuit includes a key circuit, a first switch circuit, and a second switch circuit; The key circuit is electrically connected to the battery pack, and the key circuit is used to output a first signal in response to a user's key operation; The first switch circuit is electrically connected between the key circuit and the power management chip. The first switch circuit is used to conduct the connection between the key circuit and the power management chip when receiving the voltage signal of the system power supply; The second switch circuit is electrically connected to the battery pack, and the second switch circuit outputs a second signal to the battery pack when receiving the voltage signal of the system power supply.

2. The electronic device according to claim 1, wherein When the first signal output by the key circuit wakes up the battery pack, the system power supply outputs the voltage signal according to the power supply of the battery pack to control the first switch circuit to conduct the connection between the key circuit and the power management chip, so that the first signal is transmitted to the power management chip.

3. The electronic device according to claim 1 or 2, wherein When the electronic device is plugged into a universal serial bus device, the power management chip triggers the power-on of the electronic device through the system power management interface bus, so that the system power supply outputs the voltage signal to the second switch circuit. The second switch circuit outputs the second signal to the battery pack when receiving the voltage signal to wake up the battery pack.

4. The electronic device according to claim 1, wherein The key circuit includes a power button and a first resistor. The power button includes a first terminal, a second terminal, and a pressing terminal. The first terminal of the power button is grounded, and the second terminal of the power button is electrically connected to the first switch circuit and the battery pack through the first resistor.

5. The electronic device according to claim 4, wherein When the pressing terminal is pressed, the first terminal and the second terminal are connected to each other, so that the key circuit outputs the first signal to the battery pack and the power management chip.

6. The electronic device according to claim 4, wherein When the pressing terminal is not pressed, the connection between the first terminal and the second terminal is disconnected.

7. The electronic device according to any one of claims 1 to 6, wherein The first switch circuit includes a first switch tube and a second resistor. The first terminal of the first switch tube is electrically connected to the system power supply, the second terminal of the first switch tube is electrically connected to the power management chip, the third terminal of the first switch tube is electrically connected to the second terminal of the power button through the first resistor, and the third terminal of the first switch tube is also electrically connected to the battery pack through the second resistor.

8. The electronic device according to claim 7, wherein When the pressing end is pressed, the first signal is transmitted to the battery pack to wake up the battery pack, and the system power supply outputs the voltage signal to control the first switching transistor to conduct, so that the first signal is transmitted to the power management chip.

9. The electronic device according to claim 7, wherein the second switching circuit includes a second switching transistor and a third resistor. The first end of the second switching transistor is electrically connected to the system power supply, the second end of the second switching transistor is grounded, and the third end of the second switching transistor is electrically connected to the battery pack through the third resistor.

10. The electronic device according to claim 9, wherein the battery pack includes a battery cell, a battery management chip and a fourth resistor. The enable pin of the battery management chip is electrically connected to the positive electrode of the battery cell through the fourth resistor, the enable pin is also electrically connected to the third end of the second switching transistor through the third resistor, and the enable pin is also electrically connected to the third end of the first switching transistor through the second resistor.

11. The electronic device according to claim 10, wherein when the electronic device is plugged into a universal serial bus device, the power management chip triggers the electronic device to power on through the system power management interface bus, so that the system power supply outputs the voltage signal to the second switching transistor to control the second switching transistor to conduct, so that the second signal is transmitted to the enable pin of the battery management chip.

12. The electronic device according to claim 10, wherein when the electronic device is plugged into a universal serial bus device, the power management chip triggers the electronic device to power on through the system power management interface bus, and the system power supply outputs the voltage signal to the first switching transistor to control the first switching transistor to conduct.

13. The electronic device according to any one of claims 1-12, wherein the first signal is used to wake up the battery pack and to cause the power management chip to trigger the electronic device to power on, and the second signal is used to wake up the battery pack.

14. The electronic device according to claim 13, wherein both the first signal and the second signal are low-level signals.

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