Electronic device

Abstract

This application discloses an electronic device, belonging to the field of electronic device technology. The electronic device provided in this application includes: a battery cell, a control module, a first switch module, and a load circuit. The load circuit includes at least one of a power supply VPH circuit and a battery power supply VBAT circuit for the electronic device. A first end of the battery cell is electrically connected to a first end of the load circuit, and a second end of the load circuit is electrically connected to a second end of the battery cell through the first switch module. The control module is connected to the first switch module and is used to control the first switch module to be in a first state or a second state. In the first state, the current loop between the load circuit and the battery cell is closed; in the second state, the current loop between the load circuit and the battery cell is open. This application embodiment can improve the storage time of the electronic device.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment technology, and specifically relates to an electronic device. Background Technology

[0002] Electronic devices (such as smartphones) can be left unused for a long time after they are manufactured, transported, stored, sold, and used by users. In addition, even during the user usage phase, they may remain idle for extended periods.

[0003] During the aforementioned process, electronic devices also consume battery power. If the battery is not charged for a certain period of time, it will become over-discharged, potentially causing the cell voltage to drop to extremely low levels (close to 0V). In this state, battery performance will decrease, affecting the use and lifespan of the electronic device. Summary of the Invention

[0004] The purpose of this application is to provide an electronic device that can extend the standby time of the electronic device, thereby reducing the probability of battery over-discharge and improving battery performance.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides an electronic device, including: a battery cell, a control module, a first switch module, and a load circuit. The load circuit includes at least one of the electronic device's power supply VPH circuit and battery power supply VBAT circuit.

[0007] The first end of the battery cell is electrically connected to the first end of the load circuit, and the second end of the load circuit is electrically connected to the second end of the battery cell through the first switch module;

[0008] The control module is connected to the first switch module, and the control module is used to control the first switch module to be in a first state or a second state.

[0009] In the first state, the current loop between the load circuit and the battery cell is closed;

[0010] In the second state, the current loop between the load circuit and the battery cell is disconnected.

[0011] Optionally, the first end of the battery cell is the positive terminal of the battery cell, the second end of the battery cell is the negative terminal of the battery cell, the first end of the load circuit is the power supply terminal of the load circuit, and the second end of the load circuit is the ground terminal of the load circuit.

[0012] Optionally, the first end of the battery cell is the negative terminal of the battery cell, the second end of the battery cell is the positive terminal of the battery cell, the first end of the load circuit is the ground terminal of the load circuit, and the second end of the load circuit is the power supply terminal of the load circuit.

[0013] Optionally, the control module includes: a first control unit, which is connected to the first switch module;

[0014] The first control unit includes a detection pin, which is used to detect a first electrical signal parameter of the battery cell and / or a second electrical signal parameter of the current loop between the load circuit and the battery cell;

[0015] When the first control unit determines that the battery cell is operating normally based on the first electrical signal parameters and / or the second electrical signal parameters, it controls the first switching module to be in the first state; and / or,

[0016] When the first control unit determines that the electrical signal of the battery cell meets a first condition based on the first electrical signal parameter and / or the second electrical signal parameter, it controls the first switching module to be in the second state, wherein the first condition includes at least one of the following:

[0017] The discharge voltage of the battery cell is less than or equal to a first preset voltage;

[0018] The battery cell was over-discharged;

[0019] The discharge current of the battery cell is greater than or equal to the first preset current;

[0020] The charging voltage of the battery cell is greater than or equal to the second preset voltage;

[0021] The battery cell is overcharged;

[0022] The charging current of the battery cell is greater than or equal to the second preset current.

[0023] Optionally, the first control unit obtains an operating voltage from the battery cell, and the first preset voltage includes at least one of the low voltage threshold of the battery cell and the operating voltage of the first control unit.

[0024] Optionally, the control module further includes: a second control unit, which is connected to the first switch module;

[0025] The second control unit is configured to control the first switch module to be in the second state when the electronic device meets the second condition, wherein the second condition includes at least one of the following:

[0026] The electronic device is in the factory delivery stage;

[0027] The electronic device shut down due to low battery.

[0028] The battery level of the electronic device is lower than the preset battery level;

[0029] The standby time of the electronic device is greater than or equal to a preset time.

[0030] Optionally, the electronic device may further include: a logic unit;

[0031] The first control unit includes a first control pin, and the second control unit includes a second control pin;

[0032] The first control pin of the first control unit is electrically connected to the first terminal of the logic unit, the second control pin of the second control unit is electrically connected to the second terminal of the logic unit, and the third terminal of the logic unit is electrically connected to the first switch module.

[0033] Wherein, when the first control unit determines that the electrical signal of the battery cell meets the first condition based on the first electrical signal parameter and / or the second electrical signal parameter, the first control unit outputs the first electrical signal through the first control pin of the first control unit;

[0034] When the electronic device meets the second condition, the second control unit outputs a second electrical signal through the second control pin of the second control unit;

[0035] When the first electrical signal is obtained at the first terminal of the logic unit, or when the second electrical signal is obtained at the second terminal of the logic unit, the logic unit outputs a third electrical signal to control the first switch module to be in the second state.

[0036] Optionally, the first switching module includes a first switching transistor and a second switching transistor, and the first control unit further includes a third control pin;

[0037] The gate of the first switching transistor is electrically connected to the third terminal of the logic unit, the source of the first switching transistor is electrically connected to the second terminal of the battery cell, and the drain of the first switching transistor is electrically connected to the drain of the second switching transistor.

[0038] The gate of the second switching transistor is electrically connected to the third control pin of the first control unit, and the source of the second switching transistor is electrically connected to the second terminal of the load circuit.

[0039] Wherein, when the electrical signal of the battery cell meets the first condition, the first control unit outputs a first electrical signal through the first control pin, causing the gate of the first switching transistor to disconnect the source and drain of the first switching transistor under the action of the third electrical signal, or outputs a fourth electrical signal through the third control pin, causing the gate of the second switching transistor to disconnect the source and drain of the second switching transistor under the action of the fourth electrical signal.

[0040] Optionally, the electronic device includes a power input pin, the second control unit is electrically connected to the power input pin, and the second control unit is connected in the current loop between the positive and negative terminals of the battery cell;

[0041] In the first state, the second control unit obtains operating power from the battery cell through the current loop;

[0042] In the second state, when the electronic device is connected to a charger, the second control unit obtains the operating power input through the charger via the power input pin.

[0043] In this embodiment, by setting a first switch module in the current loop between the battery cell and the load circuit, and using a control module to control the state of the first switch module, the first switch module can disconnect or connect the current loop between the battery cell and the load circuit. In this way, when the first switch module disconnects the current loop between the battery cell and the load circuit, the load circuit cannot obtain power from the battery cell, thereby greatly reducing the leakage rate of battery cell power, significantly extending the standby time of electronic devices, reducing the probability of battery over-discharge, and improving battery performance. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0045] Figure 2 This is a schematic diagram of the circuit structure of an electronic device provided in an embodiment of this application;

[0046] Figure 3 This is a schematic diagram of the circuit structure of another electronic device provided in an embodiment of this application. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0049] In related technologies, when the standby time of an electronic device exceeds a preset duration (e.g., six months or even longer), the battery may experience over-discharge, or even a state where the cell voltage drops to extremely low levels (close to 0V). In this case, to ensure the normal operation of the electronic device, the following methods can be adopted:

[0050] 1. Enables electronic devices to support 0V cell charging, ensuring that the electronic device can be activated by charging even when the cell is completely discharged to 0V. The disadvantage is that charging the cell at 0V poses a risk of liquid leakage and bulging of the battery.

[0051] 2. Increase the battery capacity of electronic devices at the factory. The disadvantages are: excessively high battery capacity poses safety risks such as fire during transportation and storage. Furthermore, increasing the factory battery capacity, if the leakage current during shutdown is high, still cannot optimize the storage time after low battery shutdown. This storage time represents the longest interval between when the electronic device is turned off and the next charging time. If the electronic device is turned off due to low battery and is charged after this storage time, there may be risks such as the battery not being able to be activated, battery damage, or reduced battery life. This storage time is sometimes also called standby time, but it is not specifically defined here.

[0052] 3. The device enters a shipping power-saving mode at the factory. In this mode, the electrical connection between the battery power supply (VBAT) circuit and the electronic device's power supply (VPH) circuit is disconnected, causing the components in the VPH circuit to disconnect from the battery. This prevents leakage current during shutdown, thereby reducing overall power-off leakage current and extending the device's storage time. The drawback is that once the user plugs in the charger, VPH and VBAT reconnect, and the device exits shipping mode. It will not re-enter shipping mode subsequently. This means the solution only optimizes the initial storage time after factory shipment and cannot optimize the idle power-off leakage current after low battery shutdown. Furthermore, if the power-off leakage current of the components in the VBAT circuit is high, it still cannot further optimize the device's storage time.

[0053] In this embodiment, the current loop between the battery cell and the load circuit is controlled by a control module. This allows the load circuit to be unable to draw power from the battery cell when the current loop between the battery cell and the load circuit is disconnected, thereby greatly reducing the rate of power leakage from the battery cell, significantly extending the standby time of the electronic device, reducing the probability of battery over-discharge, and improving battery performance.

[0054] The electronic device provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0055] Please see Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application, such as... Figure 1 As shown, the electronic device 100 includes: a battery cell 1, a control module 2, a first switch module 3, and a load circuit 4. The load circuit 4 includes at least one of the power supply VPH circuit and the battery power supply VBAT circuit of the electronic device 100.

[0056] The first end of the battery cell 1 is electrically connected to the first end of the load circuit 4, and the second end of the load circuit 4 is electrically connected to the second end of the battery cell 1 through the first switch module 3.

[0057] Control module 2 is connected to first switch module 3, and control module 2 is used to control first switch module 3 to be in a first state or a second state;

[0058] In the first state, the current loop between the load circuit 4 and the battery cell 1 is closed.

[0059] In the second state, the current loop between the load circuit 4 and the battery cell 1 is broken.

[0060] In one possible implementation, the first switch module 3 can be connected between the negative terminal of the battery cell 1 and the ground terminal of the load circuit 4. In this case, the first end of the battery cell 1 is the positive terminal of the battery cell 1, the second end of the battery cell 1 is the negative terminal of the battery cell 1, the first end of the load circuit 4 is the power supply terminal of the load circuit 4, and the second end of the load circuit 4 is the ground terminal of the load circuit 4.

[0061] For example: Figure 2 As shown, assuming the first switching module 3 includes two back-to-back metal-oxide-semiconductor field-effect transistors (MOSFETs), the load circuit includes a VBAT circuit and a VPH circuit, the positive terminal of the battery cell is connected to the power supply terminals of the VBAT circuit and the VPH circuit respectively, the first switching module 3 is connected between the negative terminal of the battery cell 1 and the motherboard ground (GND), and the VBAT circuit and the VPH circuit are grounded through the GND, so that when the first switching module 3 is turned on (i.e., both back-to-back MOSFETs are turned on), the current loop between the battery cell 1, the VBAT circuit and the VPH circuit is turned on; when the first switching module 3 is turned off (i.e., at least one of the two back-to-back MOSFETs is turned off), the current loop between the battery cell 1, the VBAT circuit and the VPH circuit is turned off.

[0062] In implementation, when the first switch module 3 is in the first state, the power supply terminal of the load circuit 4 is electrically connected to the positive terminal of the battery cell 1, and the ground terminal of the load circuit 4 is electrically connected to the negative terminal of the battery cell 1, thus forming a closed current loop. This allows the output current of the battery cell 1 to flow through the load circuit 4, thereby increasing the leakage current of the battery cell 1. However, when the first switch module 3 is in the second state, the power supply terminal of the load circuit 4 is electrically connected to the positive terminal of the battery cell 1, but the ground terminal of the load circuit 4 is disconnected from the negative terminal of the battery cell 1. This prevents the formation of a complete current loop, causing the output current of the battery cell 1 to not flow through the load circuit 4, thereby reducing the leakage current of the battery cell 1.

[0063] In another possible implementation, the first switch module 3 can be connected between the positive terminal of the battery cell 1 and the power supply terminal of the load circuit 4. In this case, the first terminal of the battery cell 1 is the negative terminal of the battery cell 1, the second terminal of the battery cell 1 is the positive terminal of the battery cell 1, the first terminal of the load circuit 4 is the ground terminal of the load circuit 4, and the second terminal of the load circuit 4 is the power supply terminal of the load circuit 4.

[0064] For example: Figure 3As shown, assuming the first switching module 3 includes two back-to-back metal-oxide-semiconductor field-effect transistors (MOSFETs), and the load circuit includes a VBAT circuit and a VPH circuit, the first terminal of the first switching module 3 is connected to the positive terminal of the battery cell 1, the second terminal of the first switching module 3 is connected to the power supply terminal of the VBAT circuit and the power supply terminal of the VPH circuit, and the negative terminal of the battery cell 1 is connected to the ground terminals of the VBAT circuit and the VPH circuit respectively, so that when the first switching module 3 is turned on (i.e., both back-to-back MOSFETs are turned on), the current loop between the battery cell 1, the VBAT circuit and the VPH circuit is turned on; when the first switching module 3 is turned off (i.e., at least one of the two back-to-back MOSFETs is turned off), the current loop between the battery cell 1, the VBAT circuit and the VPH circuit is turned off.

[0065] In implementation, when the first switch module 3 is in the first state, the power supply terminal of the load circuit 4 is electrically connected to the positive terminal of the battery cell 1, and the ground terminal of the load circuit 4 is electrically connected to the negative terminal of the battery cell 1, thus forming a closed current loop. This allows the output current of the battery cell 1 to flow through the load circuit 4, thereby increasing the leakage current of the battery cell 1. However, when the first switch module 3 is in the second state, the ground terminal of the load circuit 4 is connected to the negative terminal of the battery cell 1, but the power supply terminal of the load circuit 4 is disconnected from the positive terminal of the battery cell 1. Therefore, a complete current loop cannot be formed, and the output current of the battery cell 1 will not flow through the load circuit 4, thereby reducing the leakage current of the battery cell 1.

[0066] As an optional implementation, the control module 2 includes: a first control unit 21, which is connected to the first switch module 3;

[0067] The first control unit 21 includes a detection pin, which is used to detect a first electrical signal parameter of the battery cell 1 and / or a second electrical signal parameter of the current loop between the load circuit 4 and the battery cell 1.

[0068] When the first control unit 21 determines that the battery cell 1 is operating normally based on the first electrical signal parameters and / or the second electrical signal parameters, it controls the first switch module 3 to be in the first state; and / or,

[0069] When the first control unit 21 determines that the electrical signal of the battery cell 1 meets the first condition based on the first electrical signal parameter and / or the second electrical signal parameter, it controls the first switch module 3 to be in the second state, wherein the first condition includes at least one of the following:

[0070] The discharge voltage of the battery cell 1 is less than or equal to the first preset voltage;

[0071] The battery cell 1 was over-discharged;

[0072] The discharge current of the battery cell 1 is greater than or equal to the first preset current;

[0073] The charging voltage of the battery cell 1 is greater than or equal to the second preset voltage;

[0074] The battery cell 1 is overcharged;

[0075] The charging current of the battery cell 1 is greater than or equal to the second preset current.

[0076] In implementation, the aforementioned first control unit 21 can be a control chip installed within the battery, such as a reused existing battery protection integrated circuit (IC). This first control unit 21 can detect first electrical signal parameters of the battery cell 1 via the detection pin, such as discharge voltage, charging voltage, discharge current, and charging current, or detect second electrical signal parameters of the charging or discharging circuit, such as current and voltage. Figure 2 The VINI pin shown can be used to detect overcurrent in a current loop, such as... Figure 2 The VM pin shown can be used to detect the battery's charging and discharging voltages.

[0077] As shown in Table 1 below, the pin definitions of the first control unit 21 are as follows:

[0078] Table 1

[0079]

[0080] Option 1: During battery discharge, if the discharge voltage of cell 1 is less than or equal to the first preset voltage, it indicates that the voltage of cell 1 is too low. In order to prolong the time it takes for cell 1 to be depleted, it is necessary to control the first switch module 3 to enter the second state to reduce the leakage current of the load circuit 4, thereby slowing down the power consumption rate of cell 1. At this time, the first preset voltage can be a pre-configured voltage value that indicates that cell 1 enters the low voltage state, for example: 2.2V.

[0081] Alternatively, the first preset voltage can also be the operating voltage of the first control unit 21. In this way, when the discharge voltage of the battery cell 1 is less than the operating voltage of the first control unit 21, the first control unit 21 will not be able to operate continuously. At this time, the first control unit 21 will output a control signal by default to control the first switch module 3 to enter the second state.

[0082] Option two: In the event of battery over-discharge, to prolong the time it takes for cell 1 to be fully depleted, the first switch module 3 needs to be controlled to enter the second state to reduce the leakage current of the load circuit 4, thereby slowing down the rate at which cell 1 consumes power. In practice, over-discharge of cell 1 can be determined by detecting that the terminal voltage of cell 1 is lower than a preset voltage.

[0083] Option 3: During battery discharge, if the discharge current of cell 1 is too large, it may damage the components in the current loop. In this case, by controlling the first switch module 3 to disconnect the current loop between cell 1 and the load circuit 4, the discharge current of cell 1 can be reduced, thereby reducing the probability of overcurrent damage to the components in the electronic device. The aforementioned first preset current can be the maximum allowable current determined based on the parameters of each component in the current loop, and is not specifically limited here.

[0084] Option 4: During battery charging, if the charging voltage of cell 1 is greater than or equal to the second preset voltage, it indicates that cell 1 is about to be over-voltaged. In order to avoid damage caused by over-voltage of cell 1, the first switch module 3 is controlled to enter the second state to disconnect the current circuit for charging cell 1, thereby preventing the voltage of cell 1 from rising further. At this time, the aforementioned second preset voltage can be pre-configured to indicate the voltage value at which cell 1 is about to be over-voltaged, for example: 4.8V.

[0085] Option 5: In the event of battery overcharging, to prevent damage to cell 1 due to overcharging, the first switch module 3 is controlled to enter the second state to disconnect the charging current loop of cell 1, thereby stopping charging cell 1. In implementation, overcharging of cell 1 can be determined by detecting whether the terminal voltage of cell 1 is greater than or equal to a preset voltage.

[0086] Option 6: During battery charging, if the charging current of cell 1 is too high, it may damage the components in the current loop. In this case, by controlling the first switch module 3 to disconnect the current loop between cell 1 and the load circuit 4, the charging current of cell 1 can be reduced, thereby reducing the probability of overcurrent damage to the components in the electronic device. The aforementioned second preset current can be the maximum allowable charging current determined based on the parameters of cell 1, and is not specifically limited here.

[0087] In this embodiment, the first control unit 21 can determine whether the battery cell 1 has abnormal operating states such as over-discharge, over-charge, low charge, or overcurrent based on the detected first electrical signal parameters and / or second electrical signal parameters. In these states, it can cut off the current circuit of the battery cell 1 to reduce the leakage rate of the battery cell 1 in the low charge state, reduce the discharge rate of the battery cell 1 in the over-discharge state, reduce the risk of overcurrent damage to the charging circuit or the devices in the discharging circuit of the battery cell 1, and reduce the risk of overcharge damage to the battery cell 1.

[0088] Optionally, the first control unit 21 obtains an operating voltage from the battery cell, wherein the first preset voltage includes at least one of the low voltage threshold of the battery cell 1 and the operating voltage of the first control unit 21.

[0089] For example: Figure 2 As shown, the positive power input pin (VDD pin) of the first control unit 21 is electrically connected to the positive terminal of the battery cell 1, and the negative power input pin (VSS pin) of the first control unit 21 is electrically connected to the negative terminal of the battery cell 1. In this way, the first control unit 21 obtains the operating voltage from the battery cell through the VDD pin and the VSS pin.

[0090] In one embodiment, the first preset voltage can be a preset low voltage threshold. When the voltage of the battery cell 1 is lower than or equal to the low voltage threshold, it indicates that the remaining power of the battery cell 1 is relatively low, and thus the power saving mode is started, that is, the current loop between the battery cell 1 and the load circuit 4 is disconnected to reduce the leakage current caused by a large number of devices on the load circuit 4 to the battery cell 1, thereby greatly slowing down the power consumption rate of the battery cell 1.

[0091] In one embodiment, the first preset voltage can be the operating voltage of the first control unit 21 (i.e., the rated operating voltage, for example: 2.1V). When the voltage provided by the battery cell 1 to the first control unit 21 is lower than its operating voltage, the remaining power of the battery cell 1 is relatively low and insufficient to maintain the operating voltage of the first control unit 21. At this time, the first control unit 21 directly controls the first switching module 3 to disconnect the current loop between the battery cell 1 and the load circuit 4, so as to reduce the leakage current caused by a large number of devices on the load circuit 4 to the battery cell 1, thereby greatly slowing down the power consumption rate of the battery cell 1.

[0092] Of course, the first preset voltage may also include a preset low voltage threshold and the operating voltage of the first control unit 21. The operating voltage of the first control unit 21 may be slightly lower than the low voltage threshold. For example, the low voltage threshold is 2.2V and the operating voltage of the first control unit 21 is 2.1V. When the remaining power of the battery cell 1 is low, the first control unit 21 can control the first switching module 3 to disconnect the current loop between the battery cell 1 and the load circuit 4, so as to reduce the leakage current caused by the large number of devices on the load circuit 4 to the battery cell 1, thereby greatly slowing down the power consumption rate of the battery cell 1.

[0093] Optional, such as Figure 2 or Figure 3 As shown, the control module 2 also includes a second control unit 22, which is connected to the first switch module 3;

[0094] The second control unit 22 is used to control the first switch module 3 to be in the second state when the electronic device 100 meets the second condition, wherein the second condition includes at least one of the following:

[0095] Electronic device 100 is in the manufacturing stage;

[0096] Electronic device 100 shuts down due to low battery power (e.g., battery voltage less than or equal to 3.4V);

[0097] The battery level of electronic device 100 is lower than the preset battery level;

[0098] The standby time of electronic devices 100 is greater than or equal to the preset time.

[0099] In one embodiment, the aforementioned manufacturing stage can be the period from when the electronic device leaves the factory until its first charge. During this manufacturing stage, the electronic device may need to be stored for a relatively long time. For example, the process from when a mobile phone leaves the factory, is transported, to when it is sold may take six months or even longer. During this stage, the electronic device may be in a powered-off state, and the battery needs to be able to be charged and activated after the electronic device is sold. Thus, in order to extend the storage time supported by the electronic device, the first switch module 3 can be put into the second state after the electronic device leaves the factory to reduce the power consumption rate of the battery cell 1.

[0100] In one implementation, the electronic device will shut down when its battery level falls below a very low threshold. At this time, the battery will still retain a certain amount of charge to support a certain period of standby and subsequent charging activation. For example, the device will shut down when the remaining charge of cell 1 drops to 10%, and to extend the standby time, the first switch module 3 can be controlled to maintain a second state while the device is off.

[0101] In one implementation, when the remaining battery power of the electronic device is lower than a preset level, the first switch module 3 can be controlled to enter a second state to extend the standby time. For example, the electronic device can be turned off when the remaining battery power drops to 10%, and there is a relatively long period of time after the device is turned off without being charged. During this period, the battery cell 1 will gradually lose power (e.g., due to leakage current generated by the current loop between the battery cell 1 and the load circuit 4). In this case, in order to extend the standby time, the first switch module 3 can be controlled to enter the second state when the remaining battery power drops to 5% (i.e., the preset battery power is equal to 5%).

[0102] In one implementation, when the standby time of the electronic device reaches a preset duration (e.g., 5 days, 7 days, etc.), the first switch module 3 can be controlled to enter a second state to extend the standby time.

[0103] In implementation, Figure 2As shown, the second control unit 22 may include at least one of the processor 5 and the charging module 6 of the electronic device 100, so that the first switch module 3 can be actively controlled to enter the second state based on the processor 5 and the charging module 6.

[0104] Specifically, such as Figure 2 As shown, the processor 5 and the charging module 6 can be connected via a communication interface. The charging module 6 may include a communication interface control circuit 61, a drive circuit 62, and a second control pin (such as...). Figure 2 The BAT_CON pin shown can be a GPIO pin of the charging module (which can be controlled by the processor to output a logic high or logic low level). The processor 5 can determine whether the large electronic device 100 meets the second condition, and if the second condition is met, it sends a first control signal to the communication interface control circuit 61 through the communication interface with the charging module 6, so that the communication interface control circuit 61 sends a second control signal to the first switch module 3 through the BAT_CON pin to control the first switch module 3 to be in the second state.

[0105] In implementation, the drive circuit 62 can be used to drive at least one of the VBAT circuit and the VPH circuit. In implementation, for different states of the cell 1, the processor 5 can send a first control signal corresponding to the state to the communication interface control circuit 61. At this time, the communication interface control circuit 61 can also send a corresponding third control signal to the drive circuit 62 based on the first control signal. In this way, the drive circuit 62 can determine whether to drive all the load circuits 4 or drive only a portion of the load circuits based on the third control signal.

[0106] For example: Figure 2 As shown, assuming the electronic device also includes a second switch module 7, the VBAT circuit and the VPH circuit are connected in parallel in the power supply circuit of the battery cell 1 through the second switch module 7. When the electronic device 100 is in the factory stage and the remaining power of the electronic device 100 is greater than a certain threshold (e.g., 15%), the drive circuit 62 can control the second switch module 7 to close so that both the VBAT circuit and the VPH circuit are connected in the power supply circuit of the battery cell 1. When the remaining power of the electronic device 100 drops to a lower threshold (e.g., 10%), the drive circuit 62 can control the second switch module 7 to open so that the VBAT circuit is connected in the power supply circuit of the battery cell 1, while the VPH circuit is disconnected from the current circuit of the battery cell 1. In this way, the leakage current generated by the VPH circuit to the battery cell 1 can be reduced, thereby reducing the power consumption rate of the battery cell 1.

[0107] In this embodiment, compared to the first control unit 21 determining whether the battery cell 1 is in normal working condition based on the electrical signal in the current circuit of the battery cell 1 and / or controlling the working state of the first switch module 3 based on the determination result, the second control unit 22 can control the switching state of the first switch module 3 and / or the second switch module 7 based on the overall situation of the electronic device 100.

[0108] As an optional implementation method, such as Figure 2 or Figure 3 As shown, the electronic device 100 also includes: a logic unit 8;

[0109] The first control unit 21 includes a first control pin (such as...). Figure 2 or Figure 3 The second control unit 22 includes a second control pin (such as the DO pin in the text). Figure 2 or Figure 3 (BAT_CON pin in the middle);

[0110] The DO pin of the first control unit 21 is electrically connected to the first end of the logic unit 8, the BAT_CON pin of the second control unit 22 is electrically connected to the second end of the logic unit 8, and the third end of the logic unit 8 is electrically connected to the first switch module 3.

[0111] Wherein, when the first control unit 21 determines that the electrical signal of the battery cell 1 meets the first condition based on the first electrical signal parameter and / or the second electrical signal parameter, the first control unit 21 outputs the first electrical signal through the DO pin of the first control unit 21;

[0112] When the electronic device 100 meets the second condition, the second control unit 22 outputs a second electrical signal through the BAT_CON pin of the second control unit;

[0113] When the first electrical signal is obtained at the first terminal of the logic unit 8, or when the second electrical signal is obtained at the second terminal of the logic unit 8, the logic unit 8 outputs a third electrical signal to control the first switch module 3 to be in the second state.

[0114] In practice, the first, second, and third electrical signals can be logic low-level signals, and the first switch module 3 is disconnected based on the low-level signal.

[0115] Of course, the first, second, and third electrical signals mentioned above can also be logic high-level signals, so that the first switch module 3 is disconnected based on the high-level signal. For ease of explanation, in this embodiment, the example is that the first, second, and third electrical signals can be logic low-level signals, and the control terminal (gate) of the first switch module 3 is disconnected (i.e., the source and drain are disconnected) when it receives a low-level signal, and is turned on (i.e., the source and drain are turned on) when it receives a high-level signal. This is not a specific limitation.

[0116] For example: Assuming logic unit 8 is an AND logic unit, when both its first and second terminals receive a high-level signal, its third terminal outputs a high-level signal; otherwise, it outputs a low-level signal. As shown in Table 2 below, the correspondence between the output signals of the DO pin and the BAT_CON pin and the output signals of logic unit 8 is as follows:

[0117] Table 2

[0118]

[0119] As shown in Table 2 above, L represents logic low level and H represents logic high level.

[0120] In this embodiment, the second control unit 22 can output a high level when the electronic device is working normally, and output a low level when the electronic device meets the second condition. The logic unit 8 enables the first control unit 21 and the second control unit 22 to control the same switching module in parallel.

[0121] As an optional implementation method, such as Figure 2 or Figure 3 As shown, the first switching module 3 includes a first switching transistor 31 and a second switching transistor 32, and the first control unit 21 also includes a third control pin (such as...). Figure 2 or Figure 3 (as shown in the CO pin);

[0122] The gate (G) of the first switching transistor 31 is electrically connected to the third terminal of the logic unit 8, the source (S) of the first switching transistor 31 is electrically connected to the second terminal of the battery cell 1, and the drain (D) of the first switching transistor 31 is electrically connected to the drain of the second switching transistor 32.

[0123] The gate of the second switching transistor 32 is electrically connected to the CO pin of the first control unit 21, and the source of the second switching transistor 32 is electrically connected to the second terminal of the load circuit 4.

[0124] When the electrical signal of cell 1 meets the first condition, the first control unit 21 outputs a first electrical signal through the DO pin, causing the gate of the first switching transistor 31 to disconnect the source and drain of the first switching transistor 31 under the action of the third electrical signal, or outputs a fourth electrical signal through the CO pin, causing the gate of the second switching transistor 32 to disconnect the source and drain of the second switching transistor 32 under the action of the fourth electrical signal.

[0125] In implementation, the aforementioned DO pin can be used to control cell 1 during the discharge process, and the aforementioned CO pin can be used to control cell 1 during the charging process. Furthermore, in implementation, the first switching transistor 31 and the second switching transistor 32 can reuse the existing battery protection MOSFET in the battery to reduce the battery's path impedance. This optimizes the charging speed, reduces battery temperature rise, and reduces the voltage drop from the battery to the motherboard.

[0126] Optional, such as Figure 2 or Figure 3 The electronic device 100 shown includes a power input pin (VBUS_INPUT pin), a second control unit 22 electrically connected to the VBUS_INPUT pin, and the second control unit 22 connected in the current loop between the positive and negative terminals of the battery cell 1.

[0127] In the first state, the second control unit 22 obtains operating power from the battery cell 1 through the current loop;

[0128] In the second state, when the electronic device 100 is connected to the charger, the second control unit 22 obtains the operating power input through the charger via the VBUS_INPUT pin.

[0129] In practice, if the electronic device 100 is not connected to an external power source, the VBUS_INPUT pin cannot supply power to the second control unit 22. In this case, the second control unit 22 needs to obtain operating power from the battery cell 1. If the electronic device 100 is connected to an external power source, the VBUS_INPUT pin is energized, thereby enabling the second control unit 22 to obtain operating power through the VBUS_INPUT pin.

[0130] In one possible application scenario, if the first switch module 3 is disconnected during charging, the current loop between the battery cell 1 and the second control unit 22 will be broken, thus preventing the second control unit 22 from obtaining operating power from the battery cell 1. In this case, the second control unit 22 can obtain operating power through the VBUS_INPUT pin.

[0131] In one possible application scenario, if the electronic device 100 controls the first switch module 3 to disconnect due to low battery, and the second control unit 22 cannot obtain operating power from the battery cell 1, the first switch module 3 will remain in the disconnected state until the electronic device 100 is connected to the charger. At this point, the VBUS_INPUT pin will be energized, allowing the second control unit 22 to obtain operating power through the VBUS_INPUT pin. When the power supply is restored, the second control unit 22 can control the first switch module 3 to reset (i.e., control the first switch module 3 to close, so that the charging and discharging circuit of the battery cell 1 is connected).

[0132] In one possible application scenario, if the second control unit 22 outputs a low level when the electronic device 100 is in the factory stage, causing the first switching transistor 31 to turn off, the current loop between the battery cell 1 and the second control unit 22 is broken. The second control unit 22 cannot obtain operating power from the battery cell 1, and the electrical signal on the BAT_CON pin remains at a low level until the electronic device 100 is connected to the charger. At this time, the VBUS_INPUT pin is energized, allowing the second control unit 22 to obtain operating power through the VBUS_INPUT pin. Then, when the power supply is restored, the second control unit 22 can control the first switching transistor 31 to close. At this time, the first control unit 21 can also determine whether the battery cell 1 is in a normal working state, and control the first switching transistor 31 or the second switching transistor 32 to turn off when the battery cell 1 is in an overcurrent, over-discharge, or overcharge state.

[0133] Optionally, the load circuit 4 can be the power supply VPH circuit of the electronic device 100, the battery power supply VBAT circuit of the electronic device 100, or the VPH circuit and VBAT circuit of the electronic device 100.

[0134] In practice, the leakage current of the battery in the off state mainly comes from components in the VPH and VBAT circuits, such as... Figure 2 or Figure 3 The components 101-1nn and 201-2nn are included. By disconnecting the current loop between at least one of the VPH circuit and VBAT circuit and the battery cell 1, the leakage current of the battery cell 1 can be greatly reduced, thereby extending the time for the battery cell 1 to be depleted.

[0135] Taking the load circuit 4, which includes the VPH circuit and VBAT circuit of the electronic device 100, as an example, the electronic device 100 provided in this application embodiment can perform the following process:

[0136] Step 1: When the system is working normally, the BAT_CON pin outputs a logic high level "H".

[0137] Step 2: The BAT_CON pin outputs a logic low level "L" in the following scenarios:

[0138] A: When electronic devices leave the factory, the production line actively sends instructions, and the processor controls the BAT_CON pin to output a logic low level "L" through the communication interface;

[0139] B: When the battery is low and the system shuts down (e.g., the battery voltage is below 3.4V), the system actively sends a command, and the processor controls the BAT_CON pin to output a logic low level "L" through the communication interface;

[0140] C. When the system detects that the user has been in a screen-off, inactive state for a long time (e.g., 5 days, which can be set by the system) and the battery level is below a threshold (e.g., 35%, which can be set by the system), it actively sends a command, and the processor controls the BAT_CON pin to output a logic low level "L" through the communication interface.

[0141] Step 3: Logic unit 8 outputs a logic low level "L", and the first switching transistor 31 is turned off, so that the negative terminal of cell 1 is not connected to the GND of the devices in the VPH circuit and VBAT circuit. At this time, there are only a few devices such as the first control unit 21 and logic unit 8 on cell 1, so it can maintain a very low leakage current in the power-off state.

[0142] Step 4: If you want to turn on the device after powering off, you need to insert the charger. The charging module 6 will work, and the BAT_CON pin will output a logic high level "H" by default. The first switching transistor 31 will be turned on, and the 1VPH circuit and VBAT circuit of the battery cell will be reconnected. At this time, as long as the battery voltage meets the power-on voltage, the device can be turned on normally.

[0143] Taking a real terminal device as an example, the battery capacity is 4000mAh, and the terminal's factory default capacity is set to 35% (i.e., 1400mAh). The power-off leakage current of the components in the VPH circuit and VBAT circuit is 120uA (typ typical value) or 200uA (maximum value) respectively, and the power-off leakage current at the battery terminal is 10uA.

[0144] Without any optimization measures: the storage time from low battery shutdown (3.4V) to low cell voltage (1.5V) is 4.2 to 4.4 months, and the storage time from factory to low cell voltage (1.5V) is 9 to 12.2 months. Specific parameters are shown in Table 3 below:

[0145] Table 3

[0146]

[0147]

[0148] Wherein, UVP represents the voltage threshold for the first control unit 21 to perform over-discharge protection on cell 1, and is assumed to be equal to 2.35V.

[0149] When using Scheme 3 (i.e., disconnecting the current loop between the VPH circuit and cell 1) in the relevant technology: the storage time from low charge shutdown (3.4V) to low cell voltage (1.5V) is 4.6 to 5 months, and the storage time from factory delivery to low cell voltage (1.5V) is 13.8 to 19.9 months. The specific parameters are shown in Table 4 below.

[0150] Table 4

[0151]

[0152]

[0153] When using the solution provided in this application embodiment, the storage time from low battery shutdown (3.4V) to low cell voltage (1.5V) is 17.8 months, and the storage time from factory delivery to low cell voltage (1.5V) is 212.2 months. Specific parameters are shown in Table 5 below:

[0154] Table 5

[0155]

[0156] Based on Table 5 above, if we add a solution that increases the factory-set battery level and actively disconnects the components on the VBAT and VPH circuits after the system detects prolonged periods of inactivity with the screen off, the storage time will be even longer. For example, if the components on the VBAT and VPH circuits are actively disconnected at 45% battery level to enter an extremely low shutdown leakage current state, the storage time will be as long as 267.8 months. Specific parameters are shown in Table 6 below.

[0157] Table 6

[0158]

[0159] As can be seen from the examples above, the embodiments of this application can greatly extend the battery storage time.

[0160] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: The electronic device includes a battery cell, a control module, a first switching module, and a load circuit, wherein the load circuit includes at least one of the power supply VPH circuit and the battery power supply VBAT circuit. The first end of the battery cell is electrically connected to the first end of the load circuit, and the second end of the load circuit is electrically connected to the second end of the battery cell through the first switch module; The control module is connected to the first switch module, and the control module is used to control the first switch module to be in a first state or a second state. In the first state, the current loop between the load circuit and the battery cell is closed; In the second state, the current loop between the load circuit and the battery cell is disconnected; The control module includes: a first control unit and a second control unit. The first control unit includes a detection pin and a first control pin. The detection pin is used to detect a first electrical signal parameter of the battery cell and / or to detect a second electrical signal parameter of the current loop between the load circuit and the battery cell. The electronic device further includes a logic unit, the second control unit includes a second control pin, the first control pin of the first control unit is electrically connected to a first terminal of the logic unit, the second control pin of the second control unit is electrically connected to a second terminal of the logic unit, and the third terminal of the logic unit is electrically connected to the first switch module. Wherein, when the first control unit determines that the electrical signal of the battery cell meets the first condition based on the first electrical signal parameter and / or the second electrical signal parameter, the first control unit outputs the first electrical signal through the first control pin of the first control unit; When the electronic device meets the second condition, the second control unit outputs a second electrical signal through the second control pin of the second control unit; When the first electrical signal is obtained at the first terminal of the logic unit, or when the second electrical signal is obtained at the second terminal of the logic unit, the logic unit outputs a third electrical signal to control the first switch module to be in the second state.

2. The electronic device according to claim 1, characterized in that, The first end of the battery cell is the positive terminal of the battery cell, the second end of the battery cell is the negative terminal of the battery cell, the first end of the load circuit is the power supply terminal of the load circuit, and the second end of the load circuit is the ground terminal of the load circuit.

3. The electronic device according to claim 1, characterized in that, The first end of the battery cell is the negative terminal of the battery cell, the second end of the battery cell is the positive terminal of the battery cell, the first end of the load circuit is the ground terminal of the load circuit, and the second end of the load circuit is the power supply terminal of the load circuit.

4. The electronic device according to any one of claims 1 to 3, characterized in that, When the first control unit determines that the battery cell is operating normally based on the first electrical signal parameters and / or the second electrical signal parameters, it controls the first switching module to be in the first state; and / or, When the first control unit determines that the electrical signal of the battery cell meets a first condition based on the first electrical signal parameter and / or the second electrical signal parameter, it controls the first switching module to be in the second state, wherein the first condition includes at least one of the following: The discharge voltage of the battery cell is less than or equal to a first preset voltage; The battery cell was over-discharged; The discharge current of the battery cell is greater than or equal to the first preset current; The charging voltage of the battery cell is greater than or equal to the second preset voltage; The battery cell is overcharged; The charging current of the battery cell is greater than or equal to the second preset current.

5. The electronic device according to claim 4, characterized in that, The first control unit obtains the operating voltage from the battery cell, and the first preset voltage includes at least one of the low voltage threshold of the battery cell and the operating voltage of the first control unit.

6. The electronic device according to claim 4, characterized in that, The second condition includes at least one of the following: The electronic device is in the factory delivery stage; The electronic device shut down due to low battery. The battery level of the electronic device is lower than the preset battery level; The standby time of the electronic device is greater than or equal to a preset time.

7. The electronic device according to claim 6, characterized in that, The first switching module includes a first switching transistor and a second switching transistor, and the first control unit further includes a third control pin; The gate of the first switching transistor is electrically connected to the third terminal of the logic unit, the source of the first switching transistor is electrically connected to the second terminal of the battery cell, and the drain of the first switching transistor is electrically connected to the drain of the second switching transistor. The gate of the second switching transistor is electrically connected to the third control pin of the first control unit, and the source of the second switching transistor is electrically connected to the second terminal of the load circuit. Wherein, when the electrical signal of the battery cell meets the first condition, the first control unit outputs a first electrical signal through the first control pin, causing the gate of the first switching transistor to disconnect the source and drain of the first switching transistor under the action of the third electrical signal, or outputs a fourth electrical signal through the third control pin, causing the gate of the second switching transistor to disconnect the source and drain of the second switching transistor under the action of the fourth electrical signal.

8. The electronic device according to claim 6, characterized in that, The electronic device includes a power input pin, the second control unit is electrically connected to the power input pin, and the second control unit is connected in the current loop between the positive and negative terminals of the battery cell; In the first state, the second control unit obtains operating power from the battery cell through the current loop; In the second state, when the electronic device is connected to a charger, the second control unit obtains the operating power input through the charger via the power input pin.

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