Battery protection circuit, control method and electronic equipment

Abstract

The invention relates to a battery protection circuit, a control method and electronic equipment, the battery protection circuit is applied to the electronic equipment, the battery protection circuit comprises a first control switch, the first end of the first control switch is used for being coupled with a battery, and the second end of the first control switch is used for being coupled with a main control circuit; the first control switch is used for controlling connection and disconnection between the battery and the main control circuit; and the switching circuit is coupled with the control end of the first control switch and a key of the electronic equipment, and the switching circuit is configured to control the on-off of the first control switch according to the state of the key. The electronic equipment can be awakened through the key of the electronic equipment, so that the awakening complexity of the electronic equipment is reduced. And meanwhile, the battery and the main control circuit can be disconnected, so that the power consumption of the electronic equipment is reduced, and the storage time of the battery is prolonged.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery protection, and in particular to a battery protection circuit, a control method and an electronic device. Background Art

[0002] At present, in order to extend the storage time of the battery in the electronic device, the electronic device is controlled to operate in the shipping mode to reduce the power consumption of the electronic device to avoid battery swelling and device loss. However, when operating in the shipping mode, the electronic device is difficult to wake up, resulting in high complexity in waking up the electronic device. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a battery protection circuit, a control method and an electronic device.

[0004] According to a first aspect of the present disclosure, a battery protection circuit is provided, which is applied to an electronic device, and the battery protection circuit includes:

[0005] A first control switch, wherein a first end of the first control switch is used to couple with a battery, a second end of the first control switch is used to couple with a main control circuit, and the first control switch is used to control the connection between the battery and the main control circuit;

[0006] A switching circuit is coupled to the control end of the first control switch and a key of the electronic device, and the switching circuit is configured to control the on and off of the first control switch according to the state of the key.

[0007] In some embodiments of the present disclosure, the switching circuit is used to couple with the first end of the button; the battery protection circuit further includes:

[0008] A second control switch, wherein the first end of the second control switch is used to couple with a signal source, the second end of the second control switch is used to couple with the second end of the button, the control end of the second control switch is coupled with the switching circuit, and the second control switch is used to control the on-off between the signal source and the button according to a first signal of the switching circuit.

[0009] In some embodiments of the present disclosure, the switching circuit includes:

[0010] a first protection circuit, wherein a first end of the first protection circuit is used to be coupled to a first end of the button, and a second end of the first protection circuit is coupled to a control end of the first control switch;

[0011] an electric meter, wherein a first end of the electric meter is coupled to a first end of the button and a first end of the first protection circuit, and a second end of the electric meter is coupled to a control end of the second control switch;

[0012] The power meter is used to send a third signal to the first end of the first protection circuit based on the second signal received at the first end of the power meter so that the first protection circuit controls the on and off of the first control switch, and the second signal is used to characterize the state of the button; the second end of the power meter is used to send the first signal to the control end of the second control switch.

[0013] In some embodiments of the present disclosure, the switching circuit further includes:

[0014] a first resistor, wherein a first end of the first resistor is used to couple with the battery, a second end of the first resistor is used to couple with the main control circuit, and a voltage at the second end of the first resistor is used to reflect a charge and discharge current of the battery;

[0015] The third end of the fuel meter is coupled to the second end of the first resistor, and the fuel meter sends the third signal to the first end of the first protection circuit according to the voltage of the second end of the first resistor so that the first protection circuit controls the on and off of the first control switch.

[0016] In some embodiments of the present disclosure, the battery protection circuit further includes:

[0017] a third control switch, wherein a first end of the third control switch is used to couple with the battery, a second end of the third control switch is coupled with the first end of the first control switch, and the third control switch is used to control the connection between the battery and the first control switch;

[0018] The switching circuit further includes:

[0019] The second protection circuit is coupled to the control end of the third control switch, and the second protection circuit is used to control the on-off of the third control switch.

[0020] In some embodiments of the present disclosure, the signal of the signal source is a low-level signal.

[0021] According to a second aspect of the present disclosure, a control method for the battery protection circuit as described above is provided, and the control method for the battery protection circuit includes:

[0022] When it is determined that the electronic device is in the first mode and a key of the electronic device is pressed, switching the electronic device from the first mode to the second mode;

[0023] In the first mode, the first control switch is turned off, and in the second mode, the first control switch is turned on.

[0024] In some embodiments of the present disclosure, the control method of the battery protection circuit further includes:

[0025] In the first mode, the second control switch of the battery protection circuit is controlled to be turned on.

[0026] In some embodiments of the present disclosure, switching the electronic device from the first mode to the second mode includes:

[0027] Controlling the first control switch to be turned on;

[0028] The second control switch is controlled to be turned off.

[0029] In some embodiments of the present disclosure, in the first mode, controlling the second control switch of the battery protection circuit to be turned on includes:

[0030] Sending a first signal to the control end of the second control switch, wherein the first signal is used to make the second control switch intermittently turned on, so that the signal from the signal source is intermittently transmitted to the button;

[0031] The step of determining whether a key of the electronic device is pressed comprises:

[0032] When the number of times the signal from the signal source is transmitted to the switching circuit reaches a preset number, it is determined that a key of the electronic device is pressed.

[0033] In some embodiments of the present disclosure, when it is determined that the electronic device is in the first mode and a key of the electronic device is pressed, switching the electronic device from the first mode to the second mode includes:

[0034] If the voltage of the battery is greater than a first preset voltage, the electronic device is switched from the first mode to the second mode.

[0035] In some embodiments of the present disclosure, the control method of the battery protection circuit further includes:

[0036] When the electronic device is in a shutdown state, the discharge current of the battery is less than or equal to a preset current and the duration reaches a preset time, the electronic device is controlled to operate in the first mode.

[0037] In some embodiments of the present disclosure, the control method of the battery protection circuit further includes:

[0038] When the electronic device in the first mode is connected to a charging device and the charging current of the battery is greater than a preset current, the electronic device is switched from the first mode to the second mode.

[0039] In some embodiments of the present disclosure, the control method of the battery protection circuit further includes:

[0040] When the voltage of the battery is less than or equal to a second preset voltage, controlling the battery to operate in the first mode;

[0041] Wherein, the second preset voltage is smaller than the first preset voltage.

[0042] According to a third aspect of the present disclosure, an electronic device is provided, comprising the battery protection circuit as described above.

[0043] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0044] The battery protection circuit includes a first control switch and a switching circuit. The first control switch is coupled between the battery and the main control circuit and is used to control the connection and disconnection between the battery and the main control circuit. The switching circuit is coupled to the first control switch and the button of the electronic device, and can control the connection and disconnection of the first control switch to connect or disconnect the battery and the main control circuit according to the state of the button. Since the switching circuit can disconnect the battery and the main control circuit through the first control switch according to the state of the button, the power consumption of the electronic device is reduced. Since the switching circuit can connect the battery and the main control circuit through the first control switch according to the state of the button, the electronic device is turned on and operated. The electronic device can be awakened by pressing the button of the electronic device, thereby reducing the complexity of awakening the electronic device. At the same time, since the battery and the main control circuit can be disconnected, the power consumption of the electronic device is reduced, thereby extending the battery storage time.

[0045] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0047] Figure 1 is a structural schematic diagram of a battery protection circuit provided by an exemplary embodiment of the present disclosure;

[0048] Figure 2 is a structural schematic diagram of a battery protection circuit provided by another exemplary embodiment of the present disclosure;

[0049] Figure 3is a structural schematic diagram of a battery protection circuit provided by another exemplary embodiment of the present disclosure;

[0050] Figure 4 is a system block diagram of an electronic device provided by an exemplary embodiment of the present disclosure.

[0051] In the figure:

[0052] 1-first control switch; 2-switching circuit; 3-battery; 4-main control circuit; 5-button; 6-second control switch; 7-signal source; 21-first protection circuit; 22-electricity meter; 23-second protection circuit; T1-first transistor; T2-second transistor; T3-third transistor; T4-fourth transistor; T5-fifth transistor; VD1-first diode; VD2-second diode; VD3-third diode; VD4-fourth diode; VD5-fifth diode; R1-first resistor; R2-second resistor; R3-third resistor; R4-fourth resistor; R5-fifth resistor; R6-sixth resistor; R7-seventh resistor; R8-eighth resistor; R9-ninth resistor; R10-tenth resistor; R11-eleventh resistor; R12-twelfth resistor; R13-thirteenth resistor; R14-fourteenth resistor; NTC-thermistor; C1-first capacitor; C2-second capacitor; C3-third resistor Capacitor; C4-the fourth capacitor; C5-the fifth capacitor; GND-ground terminal; VDD-power supply terminal; VSS-common terminal; CNTD-control discharge terminal; INT-interrupt terminal; PULS-pulse terminal; COUT-discharge output terminal; DOUT-charging output terminal; V--voltage detection terminal; CS-current detection terminal; BAT_SNS-power supply sensing terminal; SRP-first current detection terminal; SRN-second current detection terminal; Power1-first power supply terminal; Power2-second power supply terminal; SDA-data transmission terminal; SCL-clock transmission terminal; D-data terminal; C-clock terminal; TS-temperature detection terminal; CE-enable terminal; BAT-battery terminal; 400-electronic device; 402-processing component; 404-memory; 406-power supply component; 408-multimedia component; 410-audio component; 412-input and output interface; 414-sensor component; 416-communication component; 420-processor. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0054] At present, with the improvement of the quality of electronic equipment, the cycle of users replacing electronic equipment has increased, resulting in a gradual lengthening of the sales cycle of electronic equipment. During the storage of electronic equipment, if the battery continues to supply power to the main control circuit, the battery may swell and the devices in the electronic equipment will have certain losses. In order to extend the storage time of the battery of the electronic equipment, the power consumption of the electronic equipment is reduced by controlling the electronic equipment to operate in low power mode or shipping mode to avoid battery swell and device loss. In low power mode, since there are many devices in the electronic equipment, the sum of the power consumption of each device is still large, making it difficult to solve the problem of battery swell. In shipping mode, some devices can be in a zero power state, thereby greatly reducing the power consumption of the electronic equipment. However, when running in shipping mode, the electronic device is difficult to wake up, resulting in high complexity in waking up the electronic device.

[0055] Based on this, the present disclosure provides a battery protection circuit, wherein the switching circuit determines whether the user needs to wake up the electronic device from the shipping mode according to the state of the button, and controls the on and off of the first control switch to connect or disconnect the battery and the main control circuit. When the electronic device is in the shipping mode, the electronic device can be woken up by simply pressing the button of the electronic device, thereby reducing the complexity of waking up the electronic device.

[0056] like Figure 1 As shown, an exemplary embodiment of the present disclosure provides a battery protection circuit, including a first control switch 1 and a switching circuit 2. The first end of the first control switch 1 is used to couple with a battery 3, and the second end is used to couple with a main control circuit 4, and is used to control the on-off between the battery 3 and the main control circuit 4. The switching circuit 2 is coupled to the control end of the first control switch 1 and a key 5 of the electronic device, and the switching circuit 2 is configured to control the on-off of the first control switch 1 according to the state of the key 5.

[0057] In this embodiment, the battery protection circuit includes a first control switch and a switching circuit. The first control switch is coupled between the battery and the main control circuit, and is used to control the connection and disconnection between the battery and the main control circuit. The switching circuit is coupled to the first control switch and the button of the electronic device, and can control the connection and disconnection of the first control switch to connect or disconnect the battery and the main control circuit according to the state of the button. Since the switching circuit can disconnect the battery and the main control circuit through the first control switch according to the state of the button, the power consumption of the electronic device is reduced. Since the switching circuit can connect the battery and the main control circuit through the first control switch according to the state of the button, the electronic device is turned on and operated. The electronic device can be awakened by pressing the button of the electronic device, thereby reducing the complexity of awakening the electronic device. At the same time, since the battery and the main control circuit can be disconnected, the power consumption of the electronic device is reduced, thereby extending the battery storage time.

[0058] In one embodiment, if Figure 2 As shown, the switching circuit 2 is used to couple with the first end of the button 5. The battery protection circuit also includes a second control switch 6. The first end of the second control switch 6 is used to couple with the signal source 7, the second end is used to couple with the second end of the button 5, and the control end is coupled with the switching circuit 2, and is used to control the connection between the signal source 7 and the button 5 according to the first signal of the switching circuit 2.

[0059] In this embodiment, the battery protection circuit also includes a second control switch, and the signal of the signal source is transmitted / not transmitted to the second end of the key by turning the second control switch on and off. When the signal of the signal source is transmitted to the second end of the key, pressing the key can further transmit the signal of the signal source to the switching circuit, so that the switching circuit determines whether the user needs to wake up the electronic device. The signal of the signal source is transmitted through the second control switch, so that the switching circuit can receive the corresponding signal to determine whether the key is pressed, thereby reducing the complexity of determining the key state. At the same time, the signal of the signal source is cut off by the second control switch to avoid false awakening when the electronic device does not need to be awakened, thereby improving the reliability of awakening the electronic device.

[0060] Exemplarily, the signal source 7 may be a signal source of the switching circuit 2, or may be a first power supply, a second power supply, etc. The first power supply may output a high level signal, and the second power supply may output a low level signal, wherein the voltage of the high level signal is greater than the voltage of the low level signal.

[0061] In one embodiment, if Figure 3As shown, the switching circuit 2 includes a first protection circuit 21 and an electric meter 22. The first end of the first protection circuit 21 is used to couple with the first end of the button 5, and the second end is coupled with the control end of the first control switch 1. The first end of the electric meter 22 is coupled with the first end of the button 5 and the first end of the first protection circuit 21, and the second end is coupled with the control end of the second control switch 6. The electric meter 22 is used to send a third signal to the first end of the first protection circuit 21 according to the second signal received at the first end of the electric meter 22 so that the first protection circuit 21 controls the on and off of the first control switch 1, and the second signal is used to characterize the state of the button 5. The second end of the electric meter 22 is used to send the first signal to the control end of the second control switch 6.

[0062] In this embodiment, the fuel gauge can determine the state of the key according to the second signal received by the first end, and control the on and off of the first control switch through the first protection circuit to keep the electronic device in the shipping mode or wake up the electronic device. Since the fuel gauge automatically controls the first protection circuit to control the first control switch according to the second signal, the complexity of the battery protection circuit control is reduced. At the same time, by multiplexing the first protection circuit and the fuel gauge in the battery protection circuit as a switching circuit, the complexity of the battery protection circuit structure is reduced.

[0063] Exemplarily, the first end of the first protection circuit 21 may be a control discharge end CNTD, and the second end may be a discharge output end DOUT. The first end of the power meter 22 may be an interrupt end INT, and the second end may be a pulse end PULS.

[0064] In one embodiment, the switching circuit 2 further includes a first resistor R1. The first end of the first resistor R1 is used to couple with the battery 3, and the second end is used to couple with the main control circuit 4. The voltage at the second end of the first resistor R1 is used to reflect the charge and discharge current of the battery 3. The third end of the fuel gauge 22 is coupled with the second end of the first resistor R1. The fuel gauge 22 sends a third signal to the first end of the first protection circuit 21 according to the voltage at the second end of the first resistor R1 so that the first protection circuit 21 controls the on and off of the first control switch 1. The first resistor R1 can be a precision resistor (Rsense).

[0065] In this embodiment, the first resistor is coupled between the battery and the main control circuit to reflect the charge and discharge current of the battery. The fuel gauge is coupled to the first resistor and can control the on and off of the first control switch through the first protection circuit according to the charge and discharge current of the battery. Since the fuel gauge can turn on the first control switch according to the charging current of the battery, the electronic device can be awakened when an external charging device is connected, thereby reducing the complexity of awakening the electronic device.

[0066] Exemplarily, the third terminal of the fuel gauge 22 may be the first current detection terminal SRN.

[0067] In one embodiment, the battery protection circuit further includes a third control switch. A first end of the third control switch is used to couple with the battery 3, and a second end is coupled with a first end of the first control switch 1, and is used to control the on-off between the battery 3 and the first control switch 1. The switching circuit 2 further includes a second protection circuit 23. The second protection circuit 23 is coupled with a control end of the third control switch, and the second protection circuit 23 is used to control the on-off of the third control switch.

[0068] In this embodiment, the third control switch and the second protection circuit can further protect the battery on the basis of the first protection circuit, thereby improving the reliability of battery protection.

[0069] In one embodiment, the signal of the signal source 7 is a low level signal. The signal source 7 may be a ground terminal GND.

[0070] In this embodiment, since the first end of the electricity meter continuously outputs a high-level signal in the shipping mode, when the signal of the signal source is a low-level signal, the low-level signal can be transmitted after the key is pressed, so as to determine the state of the key because it is different from the signal output from the first end of the electricity meter. Since the signal of the signal source is different from the signal output from the first end of the electricity meter, it is convenient to determine the state of the key, thereby reducing the complexity of waking up the electronic device.

[0071] Exemplarily, the first control switch 1 includes a first transistor T1 and a second transistor T2. The first end of the first transistor T1 is coupled to the negative electrode of the battery 3 and the ground terminal GND through the first resistor R1, and the control end is coupled to the discharge output terminal DOUT of the first protection circuit 21. The first end of the second transistor T2 is coupled to the common terminal VSS of the main control circuit 4, the second end is coupled to the second end of the first transistor T1, and the control end is coupled to the charging output terminal COUT of the first protection circuit 21. The first control switch 1 also includes a first diode VD1 and a second diode VD2. The anode of the first diode VD1 is coupled to the first end of the first transistor T1, and the cathode is coupled to the second end of the first transistor T1. The first diode VD1 can be a body diode of the first transistor T1. The anode of the second diode VD2 is coupled to the first end of the second transistor T2, and the cathode is coupled to the second end of the second transistor T2. The second diode VD2 can be a body diode of the second transistor T2.

[0072] Exemplarily, the second control switch 6 includes a third transistor T3. The first end of the third transistor T3 is coupled to the ground end GND, the second end is coupled to the second end of the button 5, and the control end is coupled to the pulse end PULS of the power meter 22. The second control switch 6 also includes a third diode VD3. The anode of the third diode VD3 is coupled to the first end of the third transistor T3, and the cathode is coupled to the second end of the third transistor T3. The third diode VD3 can be a body diode of the third transistor T3.

[0073] Exemplarily, the third control switch includes a fourth transistor T4 and a fifth transistor T5. The first end of the fourth transistor T4 is coupled to the negative electrode of the battery 3 and the ground terminal GND, and the control end is coupled to the discharge output terminal DOUT of the second protection circuit 23. The first end of the fifth transistor T5 is coupled to the first end of the first transistor T1, the second end is coupled to the second end of the fourth transistor T4, and the control end is coupled to the charging output terminal COUT of the second protection circuit 23. The third control switch also includes a fourth diode VD4 and a fifth diode VD5. The anode of the fourth diode VD4 is coupled to the first end of the fourth transistor T4, the cathode is coupled to the second end of the fourth transistor T4, and the fourth diode VD4 can be the body diode of the fourth transistor T4. The anode of the fifth diode VD5 is coupled to the first end of the fifth transistor T5, the cathode is coupled to the second end of the fifth transistor T5, and the fifth diode VD5 can be the body diode of the fifth transistor T5.

[0074] Exemplarily, the switching circuit 2 further includes a second resistor R2, a third resistor R3 and a first capacitor C1. The second resistor R2 is coupled between the voltage detection terminal V- of the first protection circuit 21 and the first end of the second transistor T2. The third resistor R3 is coupled between the power supply terminal VDD of the first protection circuit 21 and the positive electrode of the battery 3. The first capacitor C1 is coupled between the third resistor R3 and the ground terminal GND. The common terminal VSS of the first protection circuit 21 is coupled to the ground terminal GND. The current detection terminal CS of the first protection circuit 21 is coupled to the second end of the first resistor R1.

[0075] Exemplarily, the switching circuit 2 further includes a fourth resistor R4, a fifth resistor R5 and a second capacitor C2. The fourth resistor R4 is coupled between the voltage detection terminal V- of the second protection circuit 23 and the first end of the fifth transistor T5. The fifth resistor R5 is coupled between the power supply terminal VDD of the second protection circuit 23 and the positive electrode of the battery 3. The second capacitor C2 is coupled between the fifth resistor R5 and the ground terminal GND. The common terminal VSS of the second protection circuit 23 is coupled to the ground terminal GND. The current detection terminal CS of the second protection circuit 23 is coupled to the second end of the first resistor R1.

[0076] Exemplarily, the switching circuit 2 further includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a thermistor NTC, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5. The sixth resistor R6 is coupled between the positive electrode of the battery 3 and the enable terminal CE and the power supply sensing terminal BAT_SNS of the fuel gauge 22. The seventh resistor R7 is coupled between the positive electrode of the battery 3 and the battery terminal BAT of the fuel gauge 22. The eighth resistor R8 is coupled between the first current detection terminal SRN of the fuel gauge 22 and the second terminal of the first resistor R1. The ninth resistor R9 is coupled between the second current detection terminal SRP of the fuel gauge 22 and the ground terminal GND. The tenth resistor R10 is coupled between the interrupt terminal INT of the fuel gauge 22 and the first power supply terminal Power1 of the main control circuit 4. The eleventh resistor R11 is coupled between the data transmission terminal SDA of the fuel gauge 22 and the data terminal D of the main control circuit 4. The twelfth resistor R12 is coupled between the clock transmission terminal SCL of the fuel gauge 22 and the clock terminal C of the main control circuit 4. The thirteenth resistor R13 is coupled between the button 5 and the control discharge terminal CNTD of the first protection circuit 21. The thermistor NTC is coupled between the temperature detection terminal TS and the ground terminal GND of the fuel gauge 22. The third capacitor C3 is coupled between the enable terminal CE of the fuel gauge 22 and the power supply sensing terminal BAT_SNS and the first end of the second transistor T2. The fourth capacitor C4 is coupled between the first current detection terminal SRN and the second current detection terminal SRP of the fuel gauge 22. The fifth capacitor C5 is coupled between the ground terminal GND and the seventh resistor R7. The battery terminal BAT of the main control circuit 4 is coupled to the positive electrode of the battery 3. The second power supply terminal Power2 of the main control circuit 4 is coupled to the second end of the button 5.

[0077] Exemplarily, the switching circuit 2 further includes a fourteenth resistor R14. The fourteenth resistor R14 is coupled between the first end of the third transistor T3 and the ground end GND.

[0078] Exemplarily, the first protection circuit 21 and the second protection circuit 23 perform overcharge and over-discharge protection of the battery 3 through the voltage detection terminal V-, and perform overcurrent protection of the battery 3 through the current detection terminal CS. The fuel gauge 22 can calculate the power, and record the health status (SOH) of the battery 3, the number of cycles (cycle count), the maximum current of charge and discharge, the highest voltage, the lowest voltage, the ambient temperature rise and other information, and determine whether the battery 3 is an official battery through the encryption algorithm and the main control circuit 4.

[0079] An exemplary embodiment of the present disclosure further provides a control method for a battery protection circuit. The control method can be applied to the above circuit structure, for example. The control method for the battery protection circuit includes:

[0080] When it is determined that the electronic device is in the first mode and a key of the electronic device is pressed, the electronic device is switched from the first mode to the second mode.

[0081] In the first mode, the first control switch is turned off, and in the second mode, the first control switch is turned on.

[0082] In this embodiment, when the electronic device is in the first mode, some components can be in a zero power consumption state, and the power consumption of the electronic device is low. When the electronic device needs to be awakened, the user presses a button of the electronic device, and the electronic device switches from the first mode to the second mode according to the state of the button being pressed. Since the electronic device can be awakened only by pressing a button in the first mode, the complexity of awakening the electronic device is reduced.

[0083] Exemplarily, the first mode may be a sleep mode such as a shipping mode, and the second mode may be a working mode.

[0084] In one embodiment, the control method of the battery protection circuit further includes:

[0085] In the first mode, the second control switch of the battery protection circuit is controlled to be turned on.

[0086] In this embodiment, in the first mode, the second control switch is turned on to enable the signal from the signal source to be transmitted to the key so as to determine the state of the key, thereby reducing the complexity of determining the state of the key.

[0087] In one embodiment, switching the electronic device from the first mode to the second mode includes:

[0088] The first control switch is controlled to be turned on.

[0089] The second control switch is controlled to be turned off.

[0090] In this embodiment, the electronic device is switched from the first mode to the second mode, and when the electronic device is turned on and operated, the first control switch is controlled to be turned on so that the battery supplies power to the main control circuit. The second control switch is controlled to be turned off to prevent the signal from the signal source from interfering with the operation of the electronic device. By controlling the first switch to be turned on and the second control switch to be turned off, the electronic device is turned on and operated, thereby improving the reliability of the battery protection circuit.

[0091] For example, in combination Figure 3 As shown, controlling the first control switch to be turned on may be controlling the first transistor T1 to be turned on through the discharge output terminal DOUT of the first protection circuit 21. In the first mode, the charging output terminal COUT of the first protection circuit 21 controls the second transistor T2 to be turned on by default. Controlling the second control switch to be turned off may be controlling the third transistor T3 to be turned off through the pulse terminal PULS of the fuel meter 22.

[0092] In one embodiment, in the first mode, controlling the second control switch of the battery protection circuit to be turned on includes:

[0093] A first signal is sent to the control end of the second control switch, where the first signal is used to make the second control switch intermittently turned on, so that the signal from the signal source is intermittently transmitted to the key.

[0094] Determine key presses on electronic devices, including:

[0095] When the number of times that the signal from the signal source is transmitted to the switching circuit reaches a preset number, it is determined that a key of the electronic device is pressed.

[0096] In this embodiment, in the first mode, a first signal is sent to the control end of the second control switch so that the signal of the signal source is intermittently transmitted to the button, so that the fuel meter can receive intermittent pulse signals to prevent the first protection circuit from erroneously turning on the first control switch. When the number of times the signal of the signal source is transmitted to the switching circuit reaches a preset number of times, the user presses the button of the electronic device for a certain period of time, and it is determined that the button of the electronic device is pressed to avoid false touches during transportation and false awakening. Since the intermittent signal of the signal source can prevent the first control switch from being erroneously turned on, and the number of times the signal of the signal source is transmitted can prevent the electronic device from being erroneously awakened, the reliability of the battery protection circuit is improved.

[0097] For example, in combination Figure 3 As shown, the signal of the signal source 7 is a low-level signal. The first signal is sent to the control end of the second control switch, and a pulse signal can be sent through the pulse end PULS of the fuel meter 22, so that the third transistor T3 is intermittently turned on to intermittently transmit the low-level signal to the second end of the key 5. Because in the first mode, the interrupt end INT of the fuel meter 22 sends a high-level signal to the control discharge end CNTD of the first protection circuit 21, so that the first transistor T1 is turned off. When the key 5 of the electronic device is pressed, the low-level signal will be intermittently transmitted to the interrupt end INT of the fuel meter 22 through the key 5. The fuel meter 22 determines whether the key 5 of the electronic device is pressed according to the number of low-level signals received by the interrupt end INT. At the same time, since the low-level signal is intermittently transmitted to the interrupt end INT of the fuel meter 22, the control discharge end CNTD of the first protection circuit 21 also receives the intermittent low-level signal, and the first transistor T1 will not be turned on by mistake.

[0098] Exemplarily, the preset number of times can be determined according to the frequency of the pulse signal, and can be 10 times, 15 times, 20 times, etc., which is not limited here.

[0099] In one embodiment, when it is determined that the electronic device is in the first mode and a key of the electronic device is pressed, switching the electronic device from the first mode to the second mode includes:

[0100] If the voltage of the battery is greater than the first preset voltage, the electronic device is switched from the first mode to the second mode.

[0101] In this embodiment, when the voltage of the battery is greater than the first preset voltage, the battery can stably supply power to the system load of the electronic device after the electronic device wakes up. When the voltage of the battery is less than or equal to the first preset voltage, the system load cannot stably operate after the electronic device wakes up. By waking up the electronic device when it is determined that the electronic device is in the first mode and a button of the electronic device is pressed, the battery can stably supply power, thereby improving the reliability of waking up the electronic device.

[0102] In one embodiment, when it is determined that the electronic device is in the first mode and a key of the electronic device is pressed, if the voltage of the battery is less than or equal to the first preset voltage, the electronic device is controlled to operate in the first mode.

[0103] In this embodiment, when the battery voltage is less than or equal to the first preset voltage, the system load cannot operate stably after the electronic device wakes up. By determining that the electronic device is in the first mode and the key of the electronic device is pressed, the battery cannot supply power stably, and the reliability of waking up the electronic device is improved.

[0104] For example, in combination Figure 3 As shown, if the voltage of the battery 3 is greater than the first preset voltage, the interrupt terminal INT and the pulse terminal PULS of the fuel gauge 22 output a low-level signal, and the control discharge terminal CNTD of the first protection circuit 21 controls the first transistor T1 to be turned on after receiving the low-level signal, and the third transistor T3 is turned off after receiving the low-level signal. If the voltage of the battery 3 is less than or equal to the first preset voltage, the interrupt terminal INT of the fuel gauge 22 outputs a high-level signal and the pulse terminal PULS outputs a low-level signal, and the control discharge terminal CNTD of the first protection circuit 21 controls the first transistor T1 to be turned off after receiving the high-level signal, and the third transistor T3 is turned off after receiving the low-level signal, thereby avoiding waking up the electronic device by pressing the button 5.

[0105] Exemplarily, the first preset voltage has a value range of 3V to 3.6V, and may be 3.3V, 3.4V, or 3.5V.

[0106] In one embodiment, the control method of the battery protection circuit further includes:

[0107] When the electronic device is in a shutdown state, the discharge current of the battery is less than or equal to a preset current and the duration reaches a preset time, the electronic device is controlled to operate in a first mode.

[0108] In this embodiment, the electronic device is in a shutdown state, which may be shut down during use by the user, or it may be shut down after leaving the factory. When the discharge current of the battery is small and the duration reaches a preset time, it is determined that the shutdown state of the electronic device is not caused by the user shutting down, but is shut down after leaving the factory. By determining whether to control the electronic device to operate in the first mode based on the discharge current and duration of the battery to avoid affecting the use of the user, the reliability of the battery protection circuit is improved.

[0109] For example, in combination Figure 3 As shown, when the electronic device is in the off state, the discharge current of the battery is less than or equal to the preset current and the duration reaches the preset time, the interrupt terminal INT of the fuel gauge 22 outputs a high-level signal, and the control discharge terminal CNTD of the first protection circuit 22 controls the first transistor T1 to be disconnected after receiving the high-level signal, so that the electronic device operates in the first mode.

[0110] Exemplarily, the preset time may be one week, two weeks, three weeks, etc., which is not limited here.

[0111] Exemplarily, the preset current has a value range of 0.05A to 0.5A, and the preset current may be 0.1A, 0.2A, or 0.3A, etc.

[0112] Exemplarily, when the electronic device is powered on and the discharge current of the battery is greater than a preset current, the electronic device is controlled to operate in the second mode. Since the electronic device is powered on, the battery can stably supply power to the load, so that the electronic device operates in the second mode to avoid switching to the first mode and affecting the user's use. Figure 3 As shown, when the electronic device is in the power-on state and the discharge current of the battery is greater than the preset current, the interrupt terminal INT of the fuel gauge outputs a low-level signal, and the control discharge terminal CNTD of the first protection circuit 22 controls the first transistor T1 to turn on after receiving the low-level signal, so that the electronic device operates in the second mode.

[0113] In one embodiment, the control method of the battery protection circuit further includes:

[0114] When the electronic device in the first mode is connected to the charging device and the charging current of the battery is greater than the preset current, the electronic device is switched from the first mode to the second mode.

[0115] In this embodiment, when the electronic device is in the first mode, the electronic device can be awakened by connecting to a charging device. When the charging current of the battery is greater than the preset current, the battery can be charged normally, and there is no abnormality in the battery protection circuit. Waking up the electronic device by connecting to a charging device reduces the complexity of waking up the electronic device.

[0116] For example, in combination Figure 3As shown, in the first mode of the electronic device, the first transistor T1 is turned off, and the second transistor T2 and the fifth transistor T5 are turned on. When the charging device is connected, the charging current flows from the battery terminal BAT of the main control chip 4 to the positive electrode of the battery 3, and from the negative electrode of the battery 3 through the first resistor R1, the fourth diode VD4, the fifth transistor T5, the first diode VD1 and the second transistor T2 to the common terminal VSS of the main control chip 4.

[0117] In one embodiment, the control method of the battery protection circuit further includes:

[0118] When the voltage of the battery is less than or equal to the second preset voltage, the electronic device is controlled to operate in the first mode.

[0119] The second preset voltage is smaller than the first preset voltage.

[0120] In this embodiment, when the battery voltage is low, the battery cannot stably supply power to the system load, and the system load cannot operate stably. By controlling the electronic device to operate in the first mode, the electronic device is prevented from waking up and failing to operate, thereby improving the reliability of the battery protection circuit.

[0121] For example, in combination Figure 3 As shown, when the voltage of the battery is less than or equal to the second preset voltage, the interrupt terminal INT and the pulse terminal PULS of the fuel gauge 22 output a low-level signal. Although the control discharge terminal CNTD of the first protection circuit 21 receives a low-level signal, the first transistor T1 is still in a disconnected state because the first protection circuit 21 and the second protection circuit 23 enter the over-discharge protection state. That is, when the voltage of the battery 3 is less than or equal to the second preset voltage, the electronic device cannot be awakened by the button 5 and the charging device. At this time, the battery 3 needs to be charged, and when the voltage of the battery 3 is greater than the second preset voltage, it can be awakened by the charging device.

[0122] Exemplarily, the second preset voltage ranges from 2.2V to 3V, and may be 2.4V, 2.5V, or 2.6V.

[0123] The following is a detailed description of the control method of the battery protection circuit. Figure 3 As shown, when the electronic device is in the power-on state, the discharge current of the battery 3 is greater than the preset current and the voltage of the battery 3 is greater than the first preset voltage, the interrupt terminal INT of the fuel gauge 22 outputs a low-level signal, and the control discharge terminal CNTD of the first protection circuit 21 receives the low-level signal to control the first transistor T1 to be turned on. The pulse terminal PULS of the fuel gauge 22 outputs a low-level signal to control the third transistor T3 to be turned off. The electronic device operates in the second mode.

[0124] When the electronic device is turned off, the fuel gauge 22 detects the discharge current of the battery 3 through the first current detection terminal SRN and the second current detection terminal SRP. When the discharge current is less than or equal to the preset current and the duration reaches the preset time, the interrupt terminal INT of the fuel gauge 22 outputs a high-level signal, and the control discharge terminal CNTD of the first protection circuit 21 receives the high-level signal, and controls the first transistor T1 to be disconnected. The electronic device operates in the first mode, which prolongs the battery storage time. The pulse terminal PULS of the fuel gauge 22 outputs a pulse signal, the period of the pulse signal is T, and the duty cycle is D. T can be 20us, 50us, 100us, etc., and D can be 30%, 50%, 70%, etc. The third transistor T3 is turned on and off according to the pulse signal. When the button of the electronic device is pressed, the interrupt terminal INT of the fuel gauge 22 receives an intermittent low-level signal and reaches a preset number of times, the interrupt terminal INT of the fuel gauge 22 outputs a low-level signal and the pulse terminal PULS outputs a low-level signal. After the control discharge terminal CNTD of the first protection circuit 21 receives a low-level signal, it controls the first transistor T1 to be turned on to wake up the electronic device. The third transistor T3 is disconnected after receiving a low-level signal. Alternatively, when the charging device is connected, when the fuel gauge 22 detects that the charging current of the battery 3 is greater than the preset current, the interrupt terminal INT of the fuel gauge 22 outputs a low-level signal and the pulse terminal PULS outputs a low-level signal. After the control discharge terminal CNTD of the first protection circuit 21 receives a low-level signal, the first transistor T1 is controlled to be turned on to wake up the electronic device. The third transistor T3 is disconnected after receiving a low-level signal.

[0125] When the voltage of the battery 3 is less than or equal to the first preset voltage and greater than the second preset voltage, the interrupt terminal INT of the fuel gauge 22 outputs a high level signal and the pulse terminal PULS outputs a low level signal. After receiving the high level signal, the control discharge terminal CNTD of the first protection circuit 21 controls the first transistor T1 to be disconnected. The third transistor T3 is disconnected after receiving the low level signal. At this time, the electronic device cannot be awakened by pressing the button 5, and can only be awakened by connecting the charging device.

[0126] When the voltage of the battery 3 is less than or equal to the second preset voltage, the interrupt terminal INT of the fuel gauge 22 outputs a low-level signal and the pulse terminal PULS outputs a low-level signal. Although the control discharge terminal CNTD of the first protection circuit 21 receives a low-level signal, the first transistor T1 is still in the disconnected state because the first protection circuit 21 and the second protection circuit 23 enter the over-discharge protection state. That is, when the voltage of the battery 3 is less than or equal to the second preset voltage, the electronic device cannot be awakened by the button and the charging device. At this time, the battery 3 needs to be charged, and when the voltage of the battery 3 is greater than the second preset voltage, it can be awakened by the charging device.

[0127] In an exemplary embodiment, an electronic device is provided, the electronic device being, for example, a mobile phone, a laptop computer, a tablet computer, a wearable device, etc., and the electronic device includes the battery protection circuit as described above.

[0128] refer to Figure 4 As shown, electronic device 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0129] The processing component 402 generally controls the overall operation of the electronic device 400, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 402 may include one or more modules to facilitate the interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate the interaction between the multimedia component 408 and the processing component 402.

[0130] The memory 404 is configured to store various types of data to support operations on the electronic device 400. Examples of such data include instructions for any application or method operating on the electronic device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0131] The power supply component 406 provides power to the various components of the electronic device 400. The power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 400.

[0132] The multimedia component 408 includes a screen that provides an output interface between the electronic device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera module and / or a rear camera module. When the electronic device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera module and / or the rear camera module may receive external multimedia data. Each front camera module and the rear camera module may be a fixed optical lens system or have a focal length and optical zoom capability.

[0133] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC), and when the electronic device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 404 or sent via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0134] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0135] The sensor assembly 414 includes one or more sensors for providing various aspects of status assessment for the electronic device 400. For example, the sensor assembly 414 can detect the open / closed state of the electronic device 400, the relative positioning of components, such as the display and keypad of the electronic device 400, and the sensor assembly 414 can also detect the position change of the electronic device 400 or a component of the electronic device 400, the presence or absence of user contact with the electronic device 400, the orientation or acceleration / deceleration of the electronic device 400, and the temperature change of the electronic device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0136] The communication component 416 is configured to facilitate wired or wireless communication between the electronic device 400 and other terminals. The electronic device 400 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0137] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above-described methods.

[0138] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, and the above instructions can be executed by the processor 420 of the electronic device 400 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a tape, a floppy disk, and an optical data storage terminal. When the instructions in the storage medium are executed by the processor of the terminal, the terminal is enabled to perform the method shown in the above embodiment.

[0139] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0140] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0141] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery protection circuit, applied to electronic equipment, characterized in that: The battery protection circuit comprises: A first control switch, wherein a first end of the first control switch is used to couple with a battery, a second end of the first control switch is used to couple with a main control circuit, and the first control switch is used to control the connection between the battery and the main control circuit; A switching circuit is coupled to the control end of the first control switch and a key of the electronic device, and the switching circuit is configured to control the on and off of the first control switch according to the state of the key.

2. The battery protection circuit according to claim 1, characterized in that: The switching circuit is used to couple with the first end of the button; the battery protection circuit also includes: A second control switch, wherein a first end of the second control switch is used to couple with a signal source, a second end of the second control switch is coupled with a second end for the button, a control end of the second control switch is coupled with the switching circuit, and the second control switch is used to control the on / off between the signal source and the button according to a first signal of the switching circuit.

3. The battery protection circuit according to claim 2, characterized in that: The switching circuit comprises: a first protection circuit, wherein a first end of the first protection circuit is used to be coupled to a first end of the button, and a second end of the first protection circuit is coupled to a control end of the first control switch; an electric meter, wherein a first end of the electric meter is coupled to a first end of the button and a first end of the first protection circuit, and a second end of the electric meter is coupled to a control end of the second control switch; The power meter is used to send a third signal to the first end of the first protection circuit based on the second signal received at the first end of the power meter so that the first protection circuit controls the on and off of the first control switch, and the second signal is used to characterize the state of the button; the second end of the power meter is used to send the first signal to the control end of the second control switch.

4. The battery protection circuit according to claim 3, characterized in that: The switching circuit further includes: a first resistor, wherein a first end of the first resistor is used to couple with the battery, a second end of the first resistor is used to couple with the main control circuit, and a voltage at the second end of the first resistor is used to reflect a charge and discharge current of the battery; The third end of the fuel meter is coupled to the second end of the first resistor, and the fuel meter sends the third signal to the first end of the first protection circuit according to the voltage of the second end of the first resistor so that the first protection circuit controls the on and off of the first control switch.

5. The battery protection circuit according to claim 3, characterized in that: The battery protection circuit also includes: a third control switch, wherein a first end of the third control switch is used to couple with the battery, a second end of the third control switch is coupled with the first end of the first control switch, and the third control switch is used to control the connection between the battery and the first control switch; The switching circuit further includes: The second protection circuit is coupled to the control end of the third control switch, and the second protection circuit is used to control the on-off of the third control switch.

6. The battery protection circuit according to any one of claims 2 to 5, characterized in that: The signal of the signal source is a low level signal.

7. A control method for a battery protection circuit according to any one of claims 1 to 6, characterized in that: The control method of the battery protection circuit comprises: When it is determined that the electronic device is in the first mode and a key of the electronic device is pressed, switching the electronic device from the first mode to the second mode; In the first mode, the first control switch is turned off, and in the second mode, the first control switch is turned on.

8. The control method of the battery protection circuit according to claim 7, characterized in that: The control method of the battery protection circuit also includes: In the first mode, the second control switch of the battery protection circuit is controlled to be turned on.

9. The control method of the battery protection circuit according to claim 8, characterized in that: The switching of the electronic device from the first mode to the second mode includes: Controlling the first control switch to be turned on; The second control switch is controlled to be turned off.

10. The control method of the battery protection circuit according to claim 8, characterized in that: In the first mode, controlling the second control switch of the battery protection circuit to be turned on includes: Sending a first signal to the control end of the second control switch, wherein the first signal is used to make the second control switch intermittently turned on, so that the signal from the signal source is intermittently transmitted to the button; The step of determining whether a key of the electronic device is pressed comprises: When the number of times the signal from the signal source is transmitted to the switching circuit reaches a preset number, it is determined that a key of the electronic device is pressed.

11. The control method of the battery protection circuit according to claim 7, characterized in that: When it is determined that the electronic device is in the first mode and a key of the electronic device is pressed, switching the electronic device from the first mode to the second mode includes: If the voltage of the battery is greater than a first preset voltage, the electronic device is switched from the first mode to the second mode.

12. The control method of the battery protection circuit according to claim 7, characterized in that: The control method of the battery protection circuit also includes: When the electronic device is in a shutdown state, the discharge current of the battery is less than or equal to a preset current and the duration reaches a preset time, the electronic device is controlled to operate in the first mode.

13. The control method of the battery protection circuit according to any one of claims 7 to 12, characterized in that: The control method of the battery protection circuit also includes: When the electronic device in the first mode is connected to a charging device and the charging current of the battery is greater than a preset current, the electronic device is switched from the first mode to the second mode.

14. The control method of the battery protection circuit according to any one of claims 7 to 12, characterized in that: The control method of the battery protection circuit also includes: When the voltage of the battery is less than or equal to a second preset voltage, controlling the battery to operate in the first mode; Wherein, the second preset voltage is smaller than the first preset voltage.

15. An electronic device, characterized in that: The electronic device comprises the battery protection circuit according to any one of claims 1 to 6.

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